ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

42 files changed, 12459 insertions, 0 deletions

diff --git a/tools/perf/ui/Build b/tools/perf/ui/Build
new file mode 100644
index 000000000..6005f813c
--- /dev/null
+++ b/tools/perf/ui/Build
@@ -0,0 +1,13 @@
+perf-ui-y += setup.o
+perf-ui-y += helpline.o
+perf-ui-y += progress.o
+perf-ui-y += util.o
+perf-ui-y += hist.o
+perf-ui-y += stdio/hist.o
+
+CFLAGS_setup.o += -DLIBDIR="BUILD_STR($(LIBDIR))"
+
+perf-ui-$(CONFIG_SLANG) += browser.o
+perf-ui-$(CONFIG_SLANG) += keysyms.o
+perf-ui-$(CONFIG_SLANG) += browsers/
+perf-ui-$(CONFIG_SLANG) += tui/
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
new file mode 100644
index 000000000..321187b20
--- /dev/null
+++ b/tools/perf/ui/browser.c
@@ -0,0 +1,828 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../util/string2.h"
+#include "../util/config.h"
+#include "libslang.h"
+#include "ui.h"
+#include "util.h"
+#include <linux/compiler.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/string.h>
+#include <stdlib.h>
+#include <sys/ttydefaults.h>
+#include "browser.h"
+#include "helpline.h"
+#include "keysyms.h"
+#include "../util/color.h"
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
+
+static int ui_browser__percent_color(struct ui_browser *browser,
+				     double percent, bool current)
+{
+	if (current && (!browser->use_navkeypressed || browser->navkeypressed))
+		return HE_COLORSET_SELECTED;
+	if (percent >= MIN_RED)
+		return HE_COLORSET_TOP;
+	if (percent >= MIN_GREEN)
+		return HE_COLORSET_MEDIUM;
+	return HE_COLORSET_NORMAL;
+}
+
+int ui_browser__set_color(struct ui_browser *browser, int color)
+{
+	int ret = browser->current_color;
+	browser->current_color = color;
+	SLsmg_set_color(color);
+	return ret;
+}
+
+void ui_browser__set_percent_color(struct ui_browser *browser,
+				   double percent, bool current)
+{
+	 int color = ui_browser__percent_color(browser, percent, current);
+	 ui_browser__set_color(browser, color);
+}
+
+void ui_browser__gotorc_title(struct ui_browser *browser, int y, int x)
+{
+	SLsmg_gotorc(browser->y + y, browser->x + x);
+}
+
+void ui_browser__gotorc(struct ui_browser *browser, int y, int x)
+{
+	SLsmg_gotorc(browser->y + y + browser->extra_title_lines, browser->x + x);
+}
+
+void ui_browser__write_nstring(struct ui_browser *browser __maybe_unused, const char *msg,
+			       unsigned int width)
+{
+	SLsmg_write_nstring(msg, width);
+}
+
+void ui_browser__vprintf(struct ui_browser *browser __maybe_unused, const char *fmt, va_list args)
+{
+	SLsmg_vprintf(fmt, args);
+}
+
+void ui_browser__printf(struct ui_browser *browser __maybe_unused, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	ui_browser__vprintf(browser, fmt, args);
+	va_end(args);
+}
+
+static struct list_head *
+ui_browser__list_head_filter_entries(struct ui_browser *browser,
+				     struct list_head *pos)
+{
+	do {
+		if (!browser->filter || !browser->filter(browser, pos))
+			return pos;
+		pos = pos->next;
+	} while (pos != browser->entries);
+
+	return NULL;
+}
+
+static struct list_head *
+ui_browser__list_head_filter_prev_entries(struct ui_browser *browser,
+					  struct list_head *pos)
+{
+	do {
+		if (!browser->filter || !browser->filter(browser, pos))
+			return pos;
+		pos = pos->prev;
+	} while (pos != browser->entries);
+
+	return NULL;
+}
+
+void ui_browser__list_head_seek(struct ui_browser *browser, off_t offset, int whence)
+{
+	struct list_head *head = browser->entries;
+	struct list_head *pos;
+
+	if (browser->nr_entries == 0)
+		return;
+
+	switch (whence) {
+	case SEEK_SET:
+		pos = ui_browser__list_head_filter_entries(browser, head->next);
+		break;
+	case SEEK_CUR:
+		pos = browser->top;
+		break;
+	case SEEK_END:
+		pos = ui_browser__list_head_filter_prev_entries(browser, head->prev);
+		break;
+	default:
+		return;
+	}
+
+	assert(pos != NULL);
+
+	if (offset > 0) {
+		while (offset-- != 0)
+			pos = ui_browser__list_head_filter_entries(browser, pos->next);
+	} else {
+		while (offset++ != 0)
+			pos = ui_browser__list_head_filter_prev_entries(browser, pos->prev);
+	}
+
+	browser->top = pos;
+}
+
+void ui_browser__rb_tree_seek(struct ui_browser *browser, off_t offset, int whence)
+{
+	struct rb_root *root = browser->entries;
+	struct rb_node *nd;
+
+	switch (whence) {
+	case SEEK_SET:
+		nd = rb_first(root);
+		break;
+	case SEEK_CUR:
+		nd = browser->top;
+		break;
+	case SEEK_END:
+		nd = rb_last(root);
+		break;
+	default:
+		return;
+	}
+
+	if (offset > 0) {
+		while (offset-- != 0)
+			nd = rb_next(nd);
+	} else {
+		while (offset++ != 0)
+			nd = rb_prev(nd);
+	}
+
+	browser->top = nd;
+}
+
+unsigned int ui_browser__rb_tree_refresh(struct ui_browser *browser)
+{
+	struct rb_node *nd;
+	int row = 0;
+
+	if (browser->top == NULL)
+                browser->top = rb_first(browser->entries);
+
+	nd = browser->top;
+
+	while (nd != NULL) {
+		ui_browser__gotorc(browser, row, 0);
+		browser->write(browser, nd, row);
+		if (++row == browser->rows)
+			break;
+		nd = rb_next(nd);
+	}
+
+	return row;
+}
+
+bool ui_browser__is_current_entry(struct ui_browser *browser, unsigned row)
+{
+	return browser->top_idx + row == browser->index;
+}
+
+void ui_browser__refresh_dimensions(struct ui_browser *browser)
+{
+	browser->width = SLtt_Screen_Cols - 1;
+	browser->height = browser->rows = SLtt_Screen_Rows - 2;
+	browser->rows -= browser->extra_title_lines;
+	browser->y = 1;
+	browser->x = 0;
+}
+
+void ui_browser__handle_resize(struct ui_browser *browser)
+{
+	ui__refresh_dimensions(false);
+	ui_browser__show(browser, browser->title ?: "", ui_helpline__current);
+	ui_browser__refresh(browser);
+}
+
+int ui_browser__warning(struct ui_browser *browser, int timeout,
+			const char *format, ...)
+{
+	va_list args;
+	char *text;
+	int key = 0, err;
+
+	va_start(args, format);
+	err = vasprintf(&text, format, args);
+	va_end(args);
+
+	if (err < 0) {
+		va_start(args, format);
+		ui_helpline__vpush(format, args);
+		va_end(args);
+	} else {
+		while ((key = ui__question_window("Warning!", text,
+						   "Press any key...",
+						   timeout)) == K_RESIZE)
+			ui_browser__handle_resize(browser);
+		free(text);
+	}
+
+	return key;
+}
+
+int ui_browser__warn_unhandled_hotkey(struct ui_browser *browser, int key, int timeout, const char *help)
+{
+	char kname[32];
+
+	key_name(key, kname, sizeof(kname));
+	return ui_browser__warning(browser, timeout, "\n'%s' key not associated%s!\n", kname, help ?: "");
+}
+
+int ui_browser__help_window(struct ui_browser *browser, const char *text)
+{
+	int key;
+
+	while ((key = ui__help_window(text)) == K_RESIZE)
+		ui_browser__handle_resize(browser);
+
+	return key;
+}
+
+bool ui_browser__dialog_yesno(struct ui_browser *browser, const char *text)
+{
+	int key;
+
+	while ((key = ui__dialog_yesno(text)) == K_RESIZE)
+		ui_browser__handle_resize(browser);
+
+	return key == K_ENTER || toupper(key) == 'Y';
+}
+
+void ui_browser__reset_index(struct ui_browser *browser)
+{
+	browser->index = browser->top_idx = 0;
+	browser->seek(browser, 0, SEEK_SET);
+}
+
+void __ui_browser__show_title(struct ui_browser *browser, const char *title)
+{
+	SLsmg_gotorc(0, 0);
+	ui_browser__set_color(browser, HE_COLORSET_ROOT);
+	ui_browser__write_nstring(browser, title, browser->width + 1);
+}
+
+void ui_browser__show_title(struct ui_browser *browser, const char *title)
+{
+	mutex_lock(&ui__lock);
+	__ui_browser__show_title(browser, title);
+	mutex_unlock(&ui__lock);
+}
+
+int ui_browser__show(struct ui_browser *browser, const char *title,
+		     const char *helpline, ...)
+{
+	int err;
+	va_list ap;
+
+	if (browser->refresh_dimensions == NULL)
+		browser->refresh_dimensions = ui_browser__refresh_dimensions;
+
+	browser->refresh_dimensions(browser);
+
+	mutex_lock(&ui__lock);
+	__ui_browser__show_title(browser, title);
+
+	free(browser->title);
+	browser->title = strdup(title);
+	zfree(&browser->helpline);
+
+	va_start(ap, helpline);
+	err = vasprintf(&browser->helpline, helpline, ap);
+	va_end(ap);
+	if (err > 0)
+		ui_helpline__push(browser->helpline);
+	mutex_unlock(&ui__lock);
+	return err ? 0 : -1;
+}
+
+void ui_browser__hide(struct ui_browser *browser)
+{
+	mutex_lock(&ui__lock);
+	ui_helpline__pop();
+	zfree(&browser->helpline);
+	zfree(&browser->title);
+	mutex_unlock(&ui__lock);
+}
+
+static void ui_browser__scrollbar_set(struct ui_browser *browser)
+{
+	int height = browser->height, h = 0, pct = 0,
+	    col = browser->width,
+	    row = 0;
+
+	if (browser->nr_entries > 1) {
+		pct = ((browser->index * (browser->height - 1)) /
+		       (browser->nr_entries - 1));
+	}
+
+	SLsmg_set_char_set(1);
+
+	while (h < height) {
+	        ui_browser__gotorc(browser, row++, col);
+		SLsmg_write_char(h == pct ? SLSMG_DIAMOND_CHAR : SLSMG_CKBRD_CHAR);
+		++h;
+	}
+
+	SLsmg_set_char_set(0);
+}
+
+static int __ui_browser__refresh(struct ui_browser *browser)
+{
+	int row;
+	int width = browser->width;
+
+	row = browser->refresh(browser);
+	ui_browser__set_color(browser, HE_COLORSET_NORMAL);
+
+	if (!browser->use_navkeypressed || browser->navkeypressed)
+		ui_browser__scrollbar_set(browser);
+	else
+		width += 1;
+
+	SLsmg_fill_region(browser->y + row + browser->extra_title_lines, browser->x,
+			  browser->rows - row, width, ' ');
+
+	if (browser->nr_entries == 0 && browser->no_samples_msg)
+		__ui__info_window(NULL, browser->no_samples_msg, NULL);
+	return 0;
+}
+
+int ui_browser__refresh(struct ui_browser *browser)
+{
+	mutex_lock(&ui__lock);
+	__ui_browser__refresh(browser);
+	mutex_unlock(&ui__lock);
+
+	return 0;
+}
+
+/*
+ * Here we're updating nr_entries _after_ we started browsing, i.e.  we have to
+ * forget about any reference to any entry in the underlying data structure,
+ * that is why we do a SEEK_SET. Think about 'perf top' in the hists browser
+ * after an output_resort and hist decay.
+ */
+void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries)
+{
+	off_t offset = nr_entries - browser->nr_entries;
+
+	browser->nr_entries = nr_entries;
+
+	if (offset < 0) {
+		if (browser->top_idx < (u64)-offset)
+			offset = -browser->top_idx;
+
+		browser->index += offset;
+		browser->top_idx += offset;
+	}
+
+	browser->top = NULL;
+	browser->seek(browser, browser->top_idx, SEEK_SET);
+}
+
+int ui_browser__run(struct ui_browser *browser, int delay_secs)
+{
+	int err, key;
+
+	while (1) {
+		off_t offset;
+
+		mutex_lock(&ui__lock);
+		err = __ui_browser__refresh(browser);
+		SLsmg_refresh();
+		mutex_unlock(&ui__lock);
+		if (err < 0)
+			break;
+
+		key = ui__getch(delay_secs);
+
+		if (key == K_RESIZE) {
+			ui__refresh_dimensions(false);
+			browser->refresh_dimensions(browser);
+			__ui_browser__show_title(browser, browser->title);
+			ui_helpline__puts(browser->helpline);
+			continue;
+		}
+
+		if (browser->use_navkeypressed && !browser->navkeypressed) {
+			if (key == K_DOWN || key == K_UP ||
+			    (browser->columns && (key == K_LEFT || key == K_RIGHT)) ||
+			    key == K_PGDN || key == K_PGUP ||
+			    key == K_HOME || key == K_END ||
+			    key == ' ') {
+				browser->navkeypressed = true;
+				continue;
+			} else
+				return key;
+		}
+
+		switch (key) {
+		case K_DOWN:
+			if (browser->index == browser->nr_entries - 1)
+				break;
+			++browser->index;
+			if (browser->index == browser->top_idx + browser->rows) {
+				++browser->top_idx;
+				browser->seek(browser, +1, SEEK_CUR);
+			}
+			break;
+		case K_UP:
+			if (browser->index == 0)
+				break;
+			--browser->index;
+			if (browser->index < browser->top_idx) {
+				--browser->top_idx;
+				browser->seek(browser, -1, SEEK_CUR);
+			}
+			break;
+		case K_RIGHT:
+			if (!browser->columns)
+				goto out;
+			if (browser->horiz_scroll < browser->columns - 1)
+				++browser->horiz_scroll;
+			break;
+		case K_LEFT:
+			if (!browser->columns)
+				goto out;
+			if (browser->horiz_scroll != 0)
+				--browser->horiz_scroll;
+			else
+				goto out;
+			break;
+		case K_PGDN:
+		case ' ':
+			if (browser->top_idx + browser->rows > browser->nr_entries - 1)
+				break;
+
+			offset = browser->rows;
+			if (browser->index + offset > browser->nr_entries - 1)
+				offset = browser->nr_entries - 1 - browser->index;
+			browser->index += offset;
+			browser->top_idx += offset;
+			browser->seek(browser, +offset, SEEK_CUR);
+			break;
+		case K_PGUP:
+			if (browser->top_idx == 0)
+				break;
+
+			if (browser->top_idx < browser->rows)
+				offset = browser->top_idx;
+			else
+				offset = browser->rows;
+
+			browser->index -= offset;
+			browser->top_idx -= offset;
+			browser->seek(browser, -offset, SEEK_CUR);
+			break;
+		case K_HOME:
+			ui_browser__reset_index(browser);
+			break;
+		case K_END:
+			offset = browser->rows - 1;
+			if (offset >= browser->nr_entries)
+				offset = browser->nr_entries - 1;
+
+			browser->index = browser->nr_entries - 1;
+			browser->top_idx = browser->index - offset;
+			browser->seek(browser, -offset, SEEK_END);
+			break;
+		default:
+		out:
+			return key;
+		}
+	}
+	return -1;
+}
+
+unsigned int ui_browser__list_head_refresh(struct ui_browser *browser)
+{
+	struct list_head *pos;
+	struct list_head *head = browser->entries;
+	int row = 0;
+
+	if (browser->nr_entries == 0)
+		return 0;
+
+	if (browser->top == NULL || browser->top == browser->entries)
+                browser->top = ui_browser__list_head_filter_entries(browser, head->next);
+
+	pos = browser->top;
+
+	list_for_each_from(pos, head) {
+		if (!browser->filter || !browser->filter(browser, pos)) {
+			ui_browser__gotorc(browser, row, 0);
+			browser->write(browser, pos, row);
+			if (++row == browser->rows)
+				break;
+		}
+	}
+
+	return row;
+}
+
+static struct ui_browser_colorset {
+	const char *name, *fg, *bg;
+	int colorset;
+} ui_browser__colorsets[] = {
+	{
+		.colorset = HE_COLORSET_TOP,
+		.name	  = "top",
+		.fg	  = "red",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_MEDIUM,
+		.name	  = "medium",
+		.fg	  = "green",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_NORMAL,
+		.name	  = "normal",
+		.fg	  = "default",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_SELECTED,
+		.name	  = "selected",
+		.fg	  = "black",
+		.bg	  = "yellow",
+	},
+	{
+		.colorset = HE_COLORSET_JUMP_ARROWS,
+		.name	  = "jump_arrows",
+		.fg	  = "blue",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_ADDR,
+		.name	  = "addr",
+		.fg	  = "magenta",
+		.bg	  = "default",
+	},
+	{
+		.colorset = HE_COLORSET_ROOT,
+		.name	  = "root",
+		.fg	  = "white",
+		.bg	  = "blue",
+	},
+	{
+		.name = NULL,
+	}
+};
+
+
+static int ui_browser__color_config(const char *var, const char *value,
+				    void *data __maybe_unused)
+{
+	char *fg = NULL, *bg;
+	int i;
+
+	/* same dir for all commands */
+	if (!strstarts(var, "colors.") != 0)
+		return 0;
+
+	for (i = 0; ui_browser__colorsets[i].name != NULL; ++i) {
+		const char *name = var + 7;
+
+		if (strcmp(ui_browser__colorsets[i].name, name) != 0)
+			continue;
+
+		fg = strdup(value);
+		if (fg == NULL)
+			break;
+
+		bg = strchr(fg, ',');
+		if (bg == NULL)
+			break;
+
+		*bg = '\0';
+		bg = skip_spaces(bg + 1);
+		ui_browser__colorsets[i].bg = bg;
+		ui_browser__colorsets[i].fg = fg;
+		return 0;
+	}
+
+	free(fg);
+	return -1;
+}
+
+void ui_browser__argv_seek(struct ui_browser *browser, off_t offset, int whence)
+{
+	switch (whence) {
+	case SEEK_SET:
+		browser->top = browser->entries;
+		break;
+	case SEEK_CUR:
+		browser->top = (char **)browser->top + offset;
+		break;
+	case SEEK_END:
+		browser->top = (char **)browser->entries + browser->nr_entries - 1 + offset;
+		break;
+	default:
+		return;
+	}
+	assert((char **)browser->top < (char **)browser->entries + browser->nr_entries);
+	assert((char **)browser->top >= (char **)browser->entries);
+}
+
+unsigned int ui_browser__argv_refresh(struct ui_browser *browser)
+{
+	unsigned int row = 0, idx = browser->top_idx;
+	char **pos;
+
+	if (browser->top == NULL)
+		browser->top = browser->entries;
+
+	pos = (char **)browser->top;
+	while (idx < browser->nr_entries &&
+	       row < (unsigned)SLtt_Screen_Rows - 1) {
+		assert(pos < (char **)browser->entries + browser->nr_entries);
+		if (!browser->filter || !browser->filter(browser, *pos)) {
+			ui_browser__gotorc(browser, row, 0);
+			browser->write(browser, pos, row);
+			if (++row == browser->rows)
+				break;
+		}
+
+		++idx;
+		++pos;
+	}
+
+	return row;
+}
+
+void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
+			 u16 start, u16 end)
+{
+	SLsmg_set_char_set(1);
+	ui_browser__gotorc(browser, start, column);
+	SLsmg_draw_vline(end - start + 1);
+	SLsmg_set_char_set(0);
+}
+
+void ui_browser__write_graph(struct ui_browser *browser __maybe_unused,
+			     int graph)
+{
+	SLsmg_set_char_set(1);
+	SLsmg_write_char(graph);
+	SLsmg_set_char_set(0);
+}
+
+static void __ui_browser__line_arrow_up(struct ui_browser *browser,
+					unsigned int column,
+					u64 start, u64 end)
+{
+	unsigned int row, end_row;
+
+	SLsmg_set_char_set(1);
+
+	if (start < browser->top_idx + browser->rows) {
+		row = start - browser->top_idx;
+		ui_browser__gotorc(browser, row, column);
+		SLsmg_write_char(SLSMG_LLCORN_CHAR);
+		ui_browser__gotorc(browser, row, column + 1);
+		SLsmg_draw_hline(2);
+
+		if (row-- == 0)
+			goto out;
+	} else
+		row = browser->rows - 1;
+
+	if (end > browser->top_idx)
+		end_row = end - browser->top_idx;
+	else
+		end_row = 0;
+
+	ui_browser__gotorc(browser, end_row, column);
+	SLsmg_draw_vline(row - end_row + 1);
+
+	ui_browser__gotorc(browser, end_row, column);
+	if (end >= browser->top_idx) {
+		SLsmg_write_char(SLSMG_ULCORN_CHAR);
+		ui_browser__gotorc(browser, end_row, column + 1);
+		SLsmg_write_char(SLSMG_HLINE_CHAR);
+		ui_browser__gotorc(browser, end_row, column + 2);
+		SLsmg_write_char(SLSMG_RARROW_CHAR);
+	}
+out:
+	SLsmg_set_char_set(0);
+}
+
+static void __ui_browser__line_arrow_down(struct ui_browser *browser,
+					  unsigned int column,
+					  u64 start, u64 end)
+{
+	unsigned int row, end_row;
+
+	SLsmg_set_char_set(1);
+
+	if (start >= browser->top_idx) {
+		row = start - browser->top_idx;
+		ui_browser__gotorc(browser, row, column);
+		SLsmg_write_char(SLSMG_ULCORN_CHAR);
+		ui_browser__gotorc(browser, row, column + 1);
+		SLsmg_draw_hline(2);
+
+		if (++row == 0)
+			goto out;
+	} else
+		row = 0;
+
+	if (end >= browser->top_idx + browser->rows)
+		end_row = browser->rows - 1;
+	else
+		end_row = end - browser->top_idx;
+
+	ui_browser__gotorc(browser, row, column);
+	SLsmg_draw_vline(end_row - row + 1);
+
+	ui_browser__gotorc(browser, end_row, column);
+	if (end < browser->top_idx + browser->rows) {
+		SLsmg_write_char(SLSMG_LLCORN_CHAR);
+		ui_browser__gotorc(browser, end_row, column + 1);
+		SLsmg_write_char(SLSMG_HLINE_CHAR);
+		ui_browser__gotorc(browser, end_row, column + 2);
+		SLsmg_write_char(SLSMG_RARROW_CHAR);
+	}
+out:
+	SLsmg_set_char_set(0);
+}
+
+void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
+			      u64 start, u64 end)
+{
+	if (start > end)
+		__ui_browser__line_arrow_up(browser, column, start, end);
+	else
+		__ui_browser__line_arrow_down(browser, column, start, end);
+}
+
+void ui_browser__mark_fused(struct ui_browser *browser, unsigned int column,
+			    unsigned int row, int diff, bool arrow_down)
+{
+	int end_row;
+
+	if (diff <= 0)
+		return;
+
+	SLsmg_set_char_set(1);
+
+	if (arrow_down) {
+		if (row + diff <= browser->top_idx)
+			return;
+
+		end_row = row + diff - browser->top_idx;
+		ui_browser__gotorc(browser, end_row, column - 1);
+		SLsmg_write_char(SLSMG_LTEE_CHAR);
+
+		while (--end_row >= 0 && end_row > (int)(row - browser->top_idx)) {
+			ui_browser__gotorc(browser, end_row, column - 1);
+			SLsmg_draw_vline(1);
+		}
+
+		end_row = (int)(row - browser->top_idx);
+		if (end_row >= 0) {
+			ui_browser__gotorc(browser, end_row, column - 1);
+			SLsmg_write_char(SLSMG_ULCORN_CHAR);
+			ui_browser__gotorc(browser, end_row, column);
+			SLsmg_draw_hline(2);
+		}
+	} else {
+		if (row < browser->top_idx)
+			return;
+
+		end_row = row - browser->top_idx;
+		ui_browser__gotorc(browser, end_row, column - 1);
+		SLsmg_write_char(SLSMG_LTEE_CHAR);
+		ui_browser__gotorc(browser, end_row, column);
+		SLsmg_draw_hline(2);
+	}
+
+	SLsmg_set_char_set(0);
+}
+
+void ui_browser__init(void)
+{
+	int i = 0;
+
+	perf_config(ui_browser__color_config, NULL);
+
+	while (ui_browser__colorsets[i].name) {
+		struct ui_browser_colorset *c = &ui_browser__colorsets[i++];
+		SLtt_set_color(c->colorset, c->name, c->fg, c->bg);
+	}
+}
diff --git a/tools/perf/ui/browser.h b/tools/perf/ui/browser.h
new file mode 100644
index 000000000..9d4404f9b
--- /dev/null
+++ b/tools/perf/ui/browser.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_BROWSER_H_
+#define _PERF_UI_BROWSER_H_ 1
+
+#include <linux/types.h>
+#include <stdarg.h>
+#include <sys/types.h>
+
+#define HE_COLORSET_TOP		50
+#define HE_COLORSET_MEDIUM	51
+#define HE_COLORSET_NORMAL	52
+#define HE_COLORSET_SELECTED	53
+#define HE_COLORSET_JUMP_ARROWS	54
+#define HE_COLORSET_ADDR	55
+#define HE_COLORSET_ROOT	56
+
+struct ui_browser {
+	u64	      index, top_idx;
+	void	      *top, *entries;
+	u16	      y, x, width, height, rows, columns, horiz_scroll;
+	u8	      extra_title_lines;
+	int	      current_color;
+	void	      *priv;
+	char	      *title;
+	char	      *helpline;
+	const char    *no_samples_msg;
+	void 	      (*refresh_dimensions)(struct ui_browser *browser);
+	unsigned int  (*refresh)(struct ui_browser *browser);
+	void	      (*write)(struct ui_browser *browser, void *entry, int row);
+	void	      (*seek)(struct ui_browser *browser, off_t offset, int whence);
+	bool	      (*filter)(struct ui_browser *browser, void *entry);
+	u32	      nr_entries;
+	bool	      navkeypressed;
+	bool	      use_navkeypressed;
+};
+
+int  ui_browser__set_color(struct ui_browser *browser, int color);
+void ui_browser__set_percent_color(struct ui_browser *browser,
+				   double percent, bool current);
+bool ui_browser__is_current_entry(struct ui_browser *browser, unsigned row);
+void ui_browser__refresh_dimensions(struct ui_browser *browser);
+void ui_browser__reset_index(struct ui_browser *browser);
+
+void ui_browser__gotorc_title(struct ui_browser *browser, int y, int x);
+void ui_browser__gotorc(struct ui_browser *browser, int y, int x);
+void ui_browser__write_nstring(struct ui_browser *browser, const char *msg,
+			       unsigned int width);
+void ui_browser__vprintf(struct ui_browser *browser, const char *fmt, va_list args);
+void ui_browser__printf(struct ui_browser *browser, const char *fmt, ...);
+void ui_browser__write_graph(struct ui_browser *browser, int graph);
+void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
+			      u64 start, u64 end);
+void ui_browser__mark_fused(struct ui_browser *browser, unsigned int column,
+			    unsigned int row, int diff, bool arrow_down);
+void __ui_browser__show_title(struct ui_browser *browser, const char *title);
+void ui_browser__show_title(struct ui_browser *browser, const char *title);
+int ui_browser__show(struct ui_browser *browser, const char *title,
+		     const char *helpline, ...);
+void ui_browser__hide(struct ui_browser *browser);
+int ui_browser__refresh(struct ui_browser *browser);
+int ui_browser__run(struct ui_browser *browser, int delay_secs);
+void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries);
+void ui_browser__handle_resize(struct ui_browser *browser);
+void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
+			 u16 start, u16 end);
+
+int ui_browser__warning(struct ui_browser *browser, int timeout,
+			const char *format, ...);
+int ui_browser__warn_unhandled_hotkey(struct ui_browser *browser, int key, int timeout, const char *help);
+int ui_browser__help_window(struct ui_browser *browser, const char *text);
+bool ui_browser__dialog_yesno(struct ui_browser *browser, const char *text);
+int ui_browser__input_window(const char *title, const char *text, char *input,
+			     const char *exit_msg, int delay_sec);
+struct perf_session;
+int tui__header_window(struct perf_session *session);
+
+void ui_browser__argv_seek(struct ui_browser *browser, off_t offset, int whence);
+unsigned int ui_browser__argv_refresh(struct ui_browser *browser);
+
+void ui_browser__rb_tree_seek(struct ui_browser *browser, off_t offset, int whence);
+unsigned int ui_browser__rb_tree_refresh(struct ui_browser *browser);
+
+void ui_browser__list_head_seek(struct ui_browser *browser, off_t offset, int whence);
+unsigned int ui_browser__list_head_refresh(struct ui_browser *browser);
+
+void ui_browser__init(void);
+#endif /* _PERF_UI_BROWSER_H_ */
diff --git a/tools/perf/ui/browsers/Build b/tools/perf/ui/browsers/Build
new file mode 100644
index 000000000..ae67a2161
--- /dev/null
+++ b/tools/perf/ui/browsers/Build
@@ -0,0 +1,8 @@
+perf-ui-y += annotate.o
+perf-ui-y += annotate-data.o
+perf-ui-y += hists.o
+perf-ui-y += map.o
+perf-ui-y += scripts.o
+perf-ui-y += header.o
+perf-ui-y += res_sample.o
+perf-ui-y += c2c-function.o
diff --git a/tools/perf/ui/browsers/annotate-data.c b/tools/perf/ui/browsers/annotate-data.c
new file mode 100644
index 000000000..aa8c89fe2
--- /dev/null
+++ b/tools/perf/ui/browsers/annotate-data.c
@@ -0,0 +1,614 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <inttypes.h>
+#include <string.h>
+#include <linux/zalloc.h>
+#include <sys/ttydefaults.h>
+
+#include "ui/browser.h"
+#include "ui/helpline.h"
+#include "ui/keysyms.h"
+#include "ui/ui.h"
+#include "util/annotate.h"
+#include "util/annotate-data.h"
+#include "util/evsel.h"
+#include "util/evlist.h"
+#include "util/sort.h"
+
+#define FOLDED_SIGN  '+'
+#define UNFOLD_SIGN  '-'
+#define NOCHLD_SIGN  ' '
+
+struct browser_entry {
+	struct list_head node;
+	struct annotated_member *data;
+	struct type_hist_entry *hists;
+	struct browser_entry *parent;
+	struct list_head children;
+	int indent;  /*indentation level, starts from 0 */
+	int nr_entries; /* # of visible entries: self + descendents */
+	bool folded;  /* only can be false when it has children */
+};
+
+struct annotated_data_browser {
+	struct ui_browser b;
+	struct list_head entries;
+	struct browser_entry *curr;
+	int nr_events;
+};
+
+static struct annotated_data_browser *get_browser(struct ui_browser *uib)
+{
+	return container_of(uib, struct annotated_data_browser, b);
+}
+
+static void update_hist_entry(struct type_hist_entry *dst,
+			      struct type_hist_entry *src)
+{
+	dst->nr_samples += src->nr_samples;
+	dst->period += src->period;
+}
+
+static int get_member_overhead(struct annotated_data_type *adt,
+			       struct browser_entry *entry,
+			       struct evsel *leader)
+{
+	struct annotated_member *member = entry->data;
+	int i, k;
+
+	for (i = 0; i < member->size; i++) {
+		struct type_hist *h;
+		struct evsel *evsel;
+		int offset = member->offset + i;
+
+		k = 0;
+		for_each_group_evsel(evsel, leader) {
+			if (symbol_conf.skip_empty &&
+			    evsel__hists(evsel)->stats.nr_samples == 0)
+				continue;
+
+			h = adt->histograms[evsel->core.idx];
+			update_hist_entry(&entry->hists[k++], &h->addr[offset]);
+		}
+	}
+	return 0;
+}
+
+static int add_child_entries(struct annotated_data_browser *browser,
+			     struct browser_entry *parent,
+			     struct annotated_data_type *adt,
+			     struct annotated_member *member,
+			     struct evsel *evsel, int indent)
+{
+	struct annotated_member *pos;
+	struct browser_entry *entry;
+	struct list_head *parent_list;
+
+	entry = zalloc(sizeof(*entry));
+	if (entry == NULL)
+		return -1;
+
+	entry->hists = calloc(browser->nr_events, sizeof(*entry->hists));
+	if (entry->hists == NULL) {
+		free(entry);
+		return -1;
+	}
+
+	entry->data = member;
+	entry->parent = parent;
+	entry->indent = indent;
+	if (get_member_overhead(adt, entry, evsel) < 0) {
+		free(entry);
+		return -1;
+	}
+
+	INIT_LIST_HEAD(&entry->children);
+	if (parent)
+		parent_list = &parent->children;
+	else
+		parent_list = &browser->entries;
+
+	list_add_tail(&entry->node, parent_list);
+
+	list_for_each_entry(pos, &member->children, node) {
+		int nr = add_child_entries(browser, entry, adt, pos, evsel,
+					   indent + 1);
+		if (nr < 0)
+			return nr;
+	}
+
+	/* add an entry for the closing bracket ("}") */
+	if (!list_empty(&member->children)) {
+		struct browser_entry *bracket;
+
+		bracket = zalloc(sizeof(*bracket));
+		if (bracket == NULL)
+			return -1;
+
+		bracket->indent = indent;
+		bracket->parent = entry;
+		bracket->folded = true;
+		bracket->nr_entries = 1;
+
+		INIT_LIST_HEAD(&bracket->children);
+		list_add_tail(&bracket->node, &entry->children);
+	}
+
+	/* fold child entries by default */
+	entry->folded = true;
+	entry->nr_entries = 1;
+	return 0;
+}
+
+static u32 count_visible_entries(struct annotated_data_browser *browser)
+{
+	int nr = 0;
+	struct browser_entry *entry;
+
+	list_for_each_entry(entry, &browser->entries, node)
+		nr += entry->nr_entries;
+
+	return nr;
+}
+
+static int annotated_data_browser__collect_entries(struct annotated_data_browser *browser)
+{
+	struct hist_entry *he = browser->b.priv;
+	struct annotated_data_type *adt = he->mem_type;
+	struct evsel *evsel = hists_to_evsel(he->hists);
+
+	INIT_LIST_HEAD(&browser->entries);
+
+	add_child_entries(browser, /*parent=*/NULL, adt, &adt->self, evsel,
+			  /*indent=*/0);
+
+	browser->b.entries = &browser->entries;
+	browser->b.nr_entries = count_visible_entries(browser);
+	return 0;
+}
+
+static void annotated_data_browser__delete_entries(struct annotated_data_browser *browser)
+{
+	struct browser_entry *pos, *tmp;
+
+	list_for_each_entry_safe(pos, tmp, &browser->entries, node) {
+		list_del_init(&pos->node);
+		zfree(&pos->hists);
+		free(pos);
+	}
+}
+
+static struct browser_entry *get_first_child(struct browser_entry *entry)
+{
+	if (list_empty(&entry->children))
+		return NULL;
+
+	return list_first_entry(&entry->children, struct browser_entry, node);
+}
+
+static struct browser_entry *get_last_child(struct browser_entry *entry)
+{
+	if (list_empty(&entry->children))
+		return NULL;
+
+	return list_last_entry(&entry->children, struct browser_entry, node);
+}
+
+static bool is_first_child(struct browser_entry *entry)
+{
+	/* This will be checked in a different way */
+	if (entry->parent == NULL)
+		return false;
+
+	return get_first_child(entry->parent) == entry;
+}
+
+static bool is_last_child(struct browser_entry *entry)
+{
+	/* This will be checked in a different way */
+	if (entry->parent == NULL)
+		return false;
+
+	return get_last_child(entry->parent) == entry;
+}
+
+static struct browser_entry *browser__prev_entry(struct ui_browser *uib,
+						 struct browser_entry *entry)
+{
+	struct annotated_data_browser *browser = get_browser(uib);
+	struct browser_entry *first;
+
+	first = list_first_entry(&browser->entries, struct browser_entry, node);
+
+	while (entry != first) {
+		if (is_first_child(entry))
+			entry = entry->parent;
+		else {
+			entry = list_prev_entry(entry, node);
+			while (!entry->folded)
+				entry = get_last_child(entry);
+		}
+
+		if (!uib->filter || !uib->filter(uib, &entry->node))
+			return entry;
+	}
+	return first;
+}
+
+static struct browser_entry *browser__next_entry(struct ui_browser *uib,
+						 struct browser_entry *entry)
+{
+	struct annotated_data_browser *browser = get_browser(uib);
+	struct browser_entry *last;
+
+	last = list_last_entry(&browser->entries, struct browser_entry, node);
+	while (!last->folded)
+		last = get_last_child(last);
+
+	while (entry != last) {
+		if (!entry->folded)
+			entry = get_first_child(entry);
+		else {
+			while (is_last_child(entry))
+				entry = entry->parent;
+
+			entry = list_next_entry(entry, node);
+		}
+
+		if (!uib->filter || !uib->filter(uib, &entry->node))
+			return entry;
+	}
+	return last;
+}
+
+static void browser__seek(struct ui_browser *uib, off_t offset, int whence)
+{
+	struct annotated_data_browser *browser = get_browser(uib);
+	struct browser_entry *entry;
+
+	if (uib->nr_entries == 0)
+		return;
+
+	switch (whence) {
+	case SEEK_SET:
+		entry = list_first_entry(&browser->entries, typeof(*entry), node);
+		if (uib->filter && uib->filter(uib, &entry->node))
+			entry = browser__next_entry(uib, entry);
+		break;
+	case SEEK_CUR:
+		entry = list_entry(uib->top, typeof(*entry), node);
+		break;
+	case SEEK_END:
+		entry = list_last_entry(&browser->entries, typeof(*entry), node);
+		while (!entry->folded)
+			entry = get_last_child(entry);
+		if (uib->filter && uib->filter(uib, &entry->node))
+			entry = browser__prev_entry(uib, entry);
+		break;
+	default:
+		return;
+	}
+
+	assert(entry != NULL);
+
+	if (offset > 0) {
+		while (offset-- != 0)
+			entry = browser__next_entry(uib, entry);
+	} else {
+		while (offset++ != 0)
+			entry = browser__prev_entry(uib, entry);
+	}
+
+	uib->top = &entry->node;
+}
+
+static unsigned int browser__refresh(struct ui_browser *uib)
+{
+	struct annotated_data_browser *browser = get_browser(uib);
+	struct browser_entry *entry, *next;
+	int row = 0;
+
+	if (uib->top == NULL || uib->top == uib->entries)
+		browser__seek(uib, SEEK_SET, 0);
+
+	entry = list_entry(uib->top, typeof(*entry), node);
+
+	while (true) {
+		if (!uib->filter || !uib->filter(uib, &entry->node)) {
+			ui_browser__gotorc(uib, row, 0);
+			uib->write(uib, entry, row);
+			if (uib->top_idx + row == uib->index)
+				browser->curr = entry;
+			if (++row == uib->rows)
+				break;
+		}
+		next = browser__next_entry(uib, entry);
+		if (next == entry)
+			break;
+
+		entry = next;
+	}
+
+	return row;
+}
+
+static int browser__show(struct ui_browser *uib)
+{
+	struct hist_entry *he = uib->priv;
+	struct annotated_data_type *adt = he->mem_type;
+	struct annotated_data_browser *browser = get_browser(uib);
+	const char *help = "Press 'h' for help on key bindings";
+	char title[256];
+
+	snprintf(title, sizeof(title), "Annotate type: '%s' (%d samples)",
+		 adt->self.type_name, he->stat.nr_events);
+
+	if (ui_browser__show(uib, title, help) < 0)
+		return -1;
+
+	/* second line header */
+	ui_browser__gotorc_title(uib, 0, 0);
+	ui_browser__set_color(uib, HE_COLORSET_ROOT);
+
+	if (symbol_conf.show_total_period)
+		strcpy(title, "Period");
+	else if (symbol_conf.show_nr_samples)
+		strcpy(title, "Samples");
+	else
+		strcpy(title, "Percent");
+
+	ui_browser__printf(uib, "%*s %10s %10s %10s  %s",
+			   2 + 11 * (browser->nr_events - 1), "",
+			   title, "Offset", "Size", "Field");
+	ui_browser__write_nstring(uib, "", uib->width);
+	return 0;
+}
+
+static void browser__write_overhead(struct ui_browser *uib,
+				    struct type_hist *total,
+				    struct type_hist_entry *hist, int row)
+{
+	u64 period = hist->period;
+	double percent = total->period ? (100.0 * period / total->period) : 0;
+	bool current = ui_browser__is_current_entry(uib, row);
+	int nr_samples = 0;
+
+	ui_browser__set_percent_color(uib, percent, current);
+
+	if (symbol_conf.show_total_period)
+		ui_browser__printf(uib, " %10" PRIu64, period);
+	else if (symbol_conf.show_nr_samples)
+		ui_browser__printf(uib, " %10d", nr_samples);
+	else
+		ui_browser__printf(uib, " %10.2f", percent);
+
+	ui_browser__set_percent_color(uib, 0, current);
+}
+
+static void browser__write(struct ui_browser *uib, void *entry, int row)
+{
+	struct annotated_data_browser *browser = get_browser(uib);
+	struct browser_entry *be = entry;
+	struct annotated_member *member = be->data;
+	struct hist_entry *he = uib->priv;
+	struct annotated_data_type *adt = he->mem_type;
+	struct evsel *leader = hists_to_evsel(he->hists);
+	struct evsel *evsel;
+	int idx = 0;
+	bool current = ui_browser__is_current_entry(uib, row);
+
+	if (member == NULL) {
+		/* print the closing bracket */
+		ui_browser__set_percent_color(uib, 0, current);
+		ui_browser__printf(uib, "%c ", NOCHLD_SIGN);
+		ui_browser__write_nstring(uib, "", 11 * browser->nr_events);
+		ui_browser__printf(uib, " %10s %10s  %*s};",
+				   "", "", be->indent * 4, "");
+		ui_browser__write_nstring(uib, "", uib->width);
+		return;
+	}
+
+	ui_browser__set_percent_color(uib, 0, current);
+
+	if (!list_empty(&be->children))
+		ui_browser__printf(uib, "%c ", be->folded ? FOLDED_SIGN : UNFOLD_SIGN);
+	else
+		ui_browser__printf(uib, "%c ", NOCHLD_SIGN);
+
+	/* print the number */
+	for_each_group_evsel(evsel, leader) {
+		struct type_hist *h = adt->histograms[evsel->core.idx];
+
+		if (symbol_conf.skip_empty &&
+		    evsel__hists(evsel)->stats.nr_samples == 0)
+			continue;
+
+		browser__write_overhead(uib, h, &be->hists[idx++], row);
+	}
+
+	/* print type info */
+	if (be->indent == 0 && !member->var_name) {
+		ui_browser__printf(uib, " %#10x %#10x  %s%s",
+				   member->offset, member->size,
+				   member->type_name,
+				   list_empty(&member->children) || be->folded? ";" : " {");
+	} else {
+		ui_browser__printf(uib, " %#10x %#10x  %*s%s\t%s%s",
+				   member->offset, member->size,
+				   be->indent * 4, "", member->type_name,
+				   member->var_name ?: "",
+				   list_empty(&member->children) || be->folded ? ";" : " {");
+	}
+	/* fill the rest */
+	ui_browser__write_nstring(uib, "", uib->width);
+}
+
+static void annotated_data_browser__fold(struct annotated_data_browser *browser,
+					 struct browser_entry *entry,
+					 bool recursive)
+{
+	struct browser_entry *child;
+
+	if (list_empty(&entry->children))
+		return;
+	if (entry->folded && !recursive)
+		return;
+
+	if (recursive) {
+		list_for_each_entry(child, &entry->children, node)
+			annotated_data_browser__fold(browser, child, true);
+	}
+
+	entry->nr_entries = 1;
+	entry->folded = true;
+}
+
+static void annotated_data_browser__unfold(struct annotated_data_browser *browser,
+					   struct browser_entry *entry,
+					   bool recursive)
+{
+	struct browser_entry *child;
+	int nr_entries;
+
+	if (list_empty(&entry->children))
+		return;
+	if (!entry->folded && !recursive)
+		return;
+
+	nr_entries = 1; /* for self */
+	list_for_each_entry(child, &entry->children, node) {
+		if (recursive)
+			annotated_data_browser__unfold(browser, child, true);
+
+		nr_entries += child->nr_entries;
+	}
+
+	entry->nr_entries = nr_entries;
+	entry->folded = false;
+}
+
+static void annotated_data_browser__toggle_fold(struct annotated_data_browser *browser,
+						bool recursive)
+{
+	struct browser_entry *curr = browser->curr;
+	struct browser_entry *parent;
+
+	parent = curr->parent;
+	while (parent) {
+		parent->nr_entries -= curr->nr_entries;
+		parent = parent->parent;
+	}
+	browser->b.nr_entries -= curr->nr_entries;
+
+	if (curr->folded)
+		annotated_data_browser__unfold(browser, curr, recursive);
+	else
+		annotated_data_browser__fold(browser, curr, recursive);
+
+	parent = curr->parent;
+	while (parent) {
+		parent->nr_entries += curr->nr_entries;
+		parent = parent->parent;
+	}
+	browser->b.nr_entries += curr->nr_entries;
+
+	assert(browser->b.nr_entries == count_visible_entries(browser));
+}
+
+static int annotated_data_browser__run(struct annotated_data_browser *browser,
+				       struct evsel *evsel __maybe_unused,
+				       struct hist_browser_timer *hbt)
+{
+	int delay_secs = hbt ? hbt->refresh : 0;
+	int key;
+
+	if (browser__show(&browser->b) < 0)
+		return -1;
+
+	while (1) {
+		key = ui_browser__run(&browser->b, delay_secs);
+
+		switch (key) {
+		case K_TIMER:
+			if (hbt)
+				hbt->timer(hbt->arg);
+			continue;
+		case K_F1:
+		case 'h':
+			ui_browser__help_window(&browser->b,
+		"UP/DOWN/PGUP\n"
+		"PGDN/SPACE    Navigate\n"
+		"</>           Move to prev/next symbol\n"
+		"e             Expand/Collapse current entry\n"
+		"E             Expand/Collapse all children of the current\n"
+		"q/ESC/CTRL+C  Exit\n\n");
+			continue;
+		case 'e':
+			annotated_data_browser__toggle_fold(browser,
+							    /*recursive=*/false);
+			break;
+		case 'E':
+			annotated_data_browser__toggle_fold(browser,
+							    /*recursive=*/true);
+			break;
+		case K_LEFT:
+		case '<':
+		case '>':
+		case K_ESC:
+		case 'q':
+		case CTRL('c'):
+			goto out;
+		default:
+			ui_browser__warn_unhandled_hotkey(&browser->b, key, delay_secs, ", use 'h'/F1 to see actions");
+			continue;
+		}
+	}
+out:
+	ui_browser__hide(&browser->b);
+	return key;
+}
+
+int hist_entry__annotate_data_tui(struct hist_entry *he, struct evsel *evsel,
+				  struct hist_browser_timer *hbt)
+{
+	struct annotated_data_browser browser = {
+		.b = {
+			.refresh = browser__refresh,
+			.seek	 = browser__seek,
+			.write	 = browser__write,
+			.priv	 = he,
+			.extra_title_lines = 1,
+		},
+		.nr_events = 1,
+	};
+	int ret;
+
+	ui_helpline__push("Press ESC to exit");
+
+	if (evsel__is_group_event(evsel)) {
+		struct evsel *pos;
+		int nr = 0;
+
+		for_each_group_evsel(pos, evsel) {
+			if (!symbol_conf.skip_empty ||
+			    evsel__hists(pos)->stats.nr_samples)
+				nr++;
+		}
+		browser.nr_events = nr;
+	}
+
+	ret = annotated_data_browser__collect_entries(&browser);
+	if (ret < 0)
+		goto out;
+
+	/* To get the top and current entry */
+	browser__refresh(&browser.b);
+	/* Show the first-level child entries by default */
+	annotated_data_browser__toggle_fold(&browser, /*recursive=*/false);
+
+	ret = annotated_data_browser__run(&browser, evsel, hbt);
+
+out:
+	annotated_data_browser__delete_entries(&browser);
+
+	return ret;
+}
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
new file mode 100644
index 000000000..e47a46775
--- /dev/null
+++ b/tools/perf/ui/browsers/annotate.c
@@ -0,0 +1,1272 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../browser.h"
+#include "../helpline.h"
+#include "../ui.h"
+#include "../../util/annotate.h"
+#include "../../util/debug.h"
+#include "../../util/debuginfo.h"
+#include "../../util/dso.h"
+#include "../../util/hashmap.h"
+#include "../../util/hist.h"
+#include "../../util/sort.h"
+#include "../../util/map.h"
+#include "../../util/mutex.h"
+#include "../../util/symbol.h"
+#include "../../util/evsel.h"
+#include "../../util/evlist.h"
+#include "../../util/thread.h"
+#include <inttypes.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+#include <sys/ttydefaults.h>
+#include <asm/bug.h>
+
+struct arch;
+
+struct annotate_browser {
+	struct ui_browser	    b;
+	struct rb_root		    entries;
+	struct rb_node		   *curr_hot;
+	struct annotation_line	   *selection;
+	const struct arch	   *arch;
+	/*
+	 * perf top can delete hist_entry anytime.  Callers should make sure
+	 * its lifetime.
+	 */
+	struct hist_entry	   *he;
+	struct debuginfo	   *dbg;
+	struct evsel		   *evsel;
+	struct hashmap		   *type_hash;
+	bool			    searching_backwards;
+	char			    search_bf[128];
+};
+
+/* A copy of target hist_entry for perf top. */
+static struct hist_entry annotate_he;
+
+static size_t type_hash(long key, void *ctx __maybe_unused)
+{
+	return key;
+}
+
+static bool type_equal(long key1, long key2, void *ctx __maybe_unused)
+{
+	return key1 == key2;
+}
+
+static inline struct annotation *browser__annotation(struct ui_browser *browser)
+{
+	struct map_symbol *ms = browser->priv;
+	return symbol__annotation(ms->sym);
+}
+
+static bool disasm_line__filter(struct ui_browser *browser __maybe_unused, void *entry)
+{
+	struct annotation_line *al = list_entry(entry, struct annotation_line, node);
+	return annotation_line__filter(al);
+}
+
+static int ui_browser__jumps_percent_color(struct ui_browser *browser, int nr, bool current)
+{
+	struct annotation *notes = browser__annotation(browser);
+
+	if (current && (!browser->use_navkeypressed || browser->navkeypressed))
+		return HE_COLORSET_SELECTED;
+	if (nr == notes->src->max_jump_sources)
+		return HE_COLORSET_TOP;
+	if (nr > 1)
+		return HE_COLORSET_MEDIUM;
+	return HE_COLORSET_NORMAL;
+}
+
+static int ui_browser__set_jumps_percent_color(void *browser, int nr, bool current)
+{
+	 int color = ui_browser__jumps_percent_color(browser, nr, current);
+	 return ui_browser__set_color(browser, color);
+}
+
+static int annotate_browser__set_color(void *browser, int color)
+{
+	return ui_browser__set_color(browser, color);
+}
+
+static void annotate_browser__write_graph(void *browser, int graph)
+{
+	ui_browser__write_graph(browser, graph);
+}
+
+static void annotate_browser__set_percent_color(void *browser, double percent, bool current)
+{
+	ui_browser__set_percent_color(browser, percent, current);
+}
+
+static void annotate_browser__printf(void *browser, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	ui_browser__vprintf(browser, fmt, args);
+	va_end(args);
+}
+
+static void annotate_browser__write(struct ui_browser *browser, void *entry, int row)
+{
+	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
+	struct annotation *notes = browser__annotation(browser);
+	struct annotation_line *al = list_entry(entry, struct annotation_line, node);
+	const bool is_current_entry = ui_browser__is_current_entry(browser, row);
+	struct annotation_write_ops ops = {
+		.first_line		 = row == 0,
+		.current_entry		 = is_current_entry,
+		.change_color		 = (!annotate_opts.hide_src_code &&
+					    (!is_current_entry ||
+					     (browser->use_navkeypressed &&
+					      !browser->navkeypressed))),
+		.width			 = browser->width,
+		.obj			 = browser,
+		.set_color		 = annotate_browser__set_color,
+		.set_percent_color	 = annotate_browser__set_percent_color,
+		.set_jumps_percent_color = ui_browser__set_jumps_percent_color,
+		.printf			 = annotate_browser__printf,
+		.write_graph		 = annotate_browser__write_graph,
+	};
+	struct annotation_print_data apd = {
+		.he = ab->he,
+		.arch = ab->arch,
+		.evsel = ab->evsel,
+		.dbg = ab->dbg,
+	};
+
+	/* The scroll bar isn't being used */
+	if (!browser->navkeypressed)
+		ops.width += 1;
+
+	if (!IS_ERR_OR_NULL(ab->type_hash))
+		apd.type_hash = ab->type_hash;
+
+	annotation_line__write(al, notes, &ops, &apd);
+
+	if (ops.current_entry)
+		ab->selection = al;
+}
+
+static int is_fused(struct annotate_browser *ab, struct disasm_line *cursor)
+{
+	struct disasm_line *pos = list_prev_entry(cursor, al.node);
+	const char *name;
+	int diff = 1;
+
+	while (pos && pos->al.offset == -1) {
+		pos = list_prev_entry(pos, al.node);
+		if (!annotate_opts.hide_src_code)
+			diff++;
+	}
+
+	if (!pos)
+		return 0;
+
+	if (ins__is_lock(&pos->ins))
+		name = pos->ops.locked.ins.name;
+	else
+		name = pos->ins.name;
+
+	if (!name || !cursor->ins.name)
+		return 0;
+
+	if (ins__is_fused(ab->arch, name, cursor->ins.name))
+		return diff;
+	return 0;
+}
+
+static void annotate_browser__draw_current_jump(struct ui_browser *browser)
+{
+	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
+	struct disasm_line *cursor = disasm_line(ab->selection);
+	struct annotation_line *target;
+	unsigned int from, to;
+	struct map_symbol *ms = ab->b.priv;
+	struct symbol *sym = ms->sym;
+	struct annotation *notes = symbol__annotation(sym);
+	u8 pcnt_width = annotation__pcnt_width(notes);
+	u8 cntr_width = annotation__br_cntr_width();
+	int width;
+	int diff = 0;
+
+	/* PLT symbols contain external offsets */
+	if (strstr(sym->name, "@plt"))
+		return;
+
+	if (!disasm_line__is_valid_local_jump(cursor, sym))
+		return;
+
+	/*
+	 * This first was seen with a gcc function, _cpp_lex_token, that
+	 * has the usual jumps:
+	 *
+	 *  │1159e6c: ↓ jne    115aa32 <_cpp_lex_token@@Base+0xf92>
+	 *
+	 * I.e. jumps to a label inside that function (_cpp_lex_token), and
+	 * those works, but also this kind:
+	 *
+	 *  │1159e8b: ↓ jne    c469be <cpp_named_operator2name@@Base+0xa72>
+	 *
+	 *  I.e. jumps to another function, outside _cpp_lex_token, which
+	 *  are not being correctly handled generating as a side effect references
+	 *  to ab->offset[] entries that are set to NULL, so to make this code
+	 *  more robust, check that here.
+	 *
+	 *  A proper fix for will be put in place, looking at the function
+	 *  name right after the '<' token and probably treating this like a
+	 *  'call' instruction.
+	 */
+	target = annotated_source__get_line(notes->src, cursor->ops.target.offset);
+	if (target == NULL) {
+		ui_helpline__printf("WARN: jump target inconsistency, press 'o', notes->offsets[%#x] = NULL\n",
+				    cursor->ops.target.offset);
+		return;
+	}
+
+	if (annotate_opts.hide_src_code) {
+		from = cursor->al.idx_asm;
+		to = target->idx_asm;
+	} else {
+		from = (u64)cursor->al.idx;
+		to = (u64)target->idx;
+	}
+
+	width = annotation__cycles_width(notes);
+
+	ui_browser__set_color(browser, HE_COLORSET_JUMP_ARROWS);
+	__ui_browser__line_arrow(browser,
+				 pcnt_width + 2 + notes->src->widths.addr + width + cntr_width,
+				 from, to);
+
+	diff = is_fused(ab, cursor);
+	if (diff > 0) {
+		ui_browser__mark_fused(browser,
+				       pcnt_width + 3 + notes->src->widths.addr + width + cntr_width,
+				       from - diff, diff, to > from);
+	}
+}
+
+static unsigned int annotate_browser__refresh(struct ui_browser *browser)
+{
+	struct annotation *notes = browser__annotation(browser);
+	int ret = ui_browser__list_head_refresh(browser);
+	int pcnt_width = annotation__pcnt_width(notes);
+
+	if (annotate_opts.jump_arrows)
+		annotate_browser__draw_current_jump(browser);
+
+	ui_browser__set_color(browser, HE_COLORSET_NORMAL);
+	__ui_browser__vline(browser, pcnt_width, 0, browser->rows - 1);
+	return ret;
+}
+
+static double disasm__cmp(struct annotation_line *a, struct annotation_line *b,
+						  int percent_type)
+{
+	int i;
+
+	for (i = 0; i < a->data_nr; i++) {
+		if (a->data[i].percent[percent_type] == b->data[i].percent[percent_type])
+			continue;
+		return a->data[i].percent[percent_type] -
+			   b->data[i].percent[percent_type];
+	}
+	return 0;
+}
+
+static void disasm_rb_tree__insert(struct annotate_browser *browser,
+				struct annotation_line *al)
+{
+	struct rb_root *root = &browser->entries;
+	struct rb_node **p = &root->rb_node;
+	struct rb_node *parent = NULL;
+	struct annotation_line *l;
+
+	while (*p != NULL) {
+		parent = *p;
+		l = rb_entry(parent, struct annotation_line, rb_node);
+
+		if (disasm__cmp(al, l, annotate_opts.percent_type) < 0)
+			p = &(*p)->rb_left;
+		else
+			p = &(*p)->rb_right;
+	}
+	rb_link_node(&al->rb_node, parent, p);
+	rb_insert_color(&al->rb_node, root);
+}
+
+static void annotate_browser__set_top(struct annotate_browser *browser,
+				      struct annotation_line *pos, u32 idx)
+{
+	unsigned back;
+
+	ui_browser__refresh_dimensions(&browser->b);
+	back = browser->b.height / 2;
+	browser->b.top_idx = browser->b.index = idx;
+
+	while (browser->b.top_idx != 0 && back != 0) {
+		pos = list_entry(pos->node.prev, struct annotation_line, node);
+
+		if (annotation_line__filter(pos))
+			continue;
+
+		--browser->b.top_idx;
+		--back;
+	}
+
+	browser->b.top = pos;
+	browser->b.navkeypressed = true;
+}
+
+static void annotate_browser__set_rb_top(struct annotate_browser *browser,
+					 struct rb_node *nd)
+{
+	struct annotation_line * pos = rb_entry(nd, struct annotation_line, rb_node);
+	u32 idx = pos->idx;
+
+	if (annotate_opts.hide_src_code)
+		idx = pos->idx_asm;
+	annotate_browser__set_top(browser, pos, idx);
+	browser->curr_hot = nd;
+}
+
+static void annotate_browser__calc_percent(struct annotate_browser *browser,
+					   struct evsel *evsel)
+{
+	struct map_symbol *ms = browser->b.priv;
+	struct symbol *sym = ms->sym;
+	struct annotation *notes = symbol__annotation(sym);
+	struct disasm_line *pos;
+
+	browser->entries = RB_ROOT;
+
+	annotation__lock(notes);
+
+	symbol__calc_percent(sym, evsel);
+
+	list_for_each_entry(pos, &notes->src->source, al.node) {
+		double max_percent = 0.0;
+		int i;
+
+		if (pos->al.offset == -1) {
+			RB_CLEAR_NODE(&pos->al.rb_node);
+			continue;
+		}
+
+		for (i = 0; i < pos->al.data_nr; i++) {
+			double percent;
+
+			percent = annotation_data__percent(&pos->al.data[i],
+							   annotate_opts.percent_type);
+
+			if (max_percent < percent)
+				max_percent = percent;
+		}
+
+		if (max_percent < 0.01 && (!pos->al.cycles || pos->al.cycles->ipc == 0)) {
+			RB_CLEAR_NODE(&pos->al.rb_node);
+			continue;
+		}
+		disasm_rb_tree__insert(browser, &pos->al);
+	}
+	annotation__unlock(notes);
+
+	browser->curr_hot = rb_last(&browser->entries);
+}
+
+static struct annotation_line *annotate_browser__find_new_asm_line(
+					struct annotate_browser *browser,
+					int idx_asm)
+{
+	struct annotation_line *al;
+	struct list_head *head = browser->b.entries;
+
+	/* find an annotation line in the new list with the same idx_asm */
+	list_for_each_entry(al, head, node) {
+		if (al->idx_asm == idx_asm)
+			return al;
+	}
+
+	/* There are no asm lines */
+	return NULL;
+}
+
+static struct annotation_line *annotate_browser__find_next_asm_line(
+					struct annotate_browser *browser,
+					struct annotation_line *al)
+{
+	struct annotation_line *it = al;
+
+	/* find next asm line */
+	list_for_each_entry_continue(it, browser->b.entries, node) {
+		if (it->idx_asm >= 0)
+			return it;
+	}
+
+	/* no asm line found forwards, try backwards */
+	it = al;
+	list_for_each_entry_continue_reverse(it, browser->b.entries, node) {
+		if (it->idx_asm >= 0)
+			return it;
+	}
+
+	/* There are no asm lines */
+	return NULL;
+}
+
+static bool annotation__has_source(struct annotation *notes)
+{
+	struct annotation_line *al;
+	bool found_asm = false;
+
+	/* Let's skip the first non-asm lines which present regardless of source. */
+	list_for_each_entry(al, &notes->src->source, node) {
+		if (al->offset >= 0) {
+			found_asm = true;
+			break;
+		}
+	}
+
+	if (found_asm) {
+		/* After assembly lines, any line without offset means source. */
+		list_for_each_entry_continue(al, &notes->src->source, node) {
+			if (al->offset == -1)
+				return true;
+		}
+	}
+	return false;
+}
+
+static bool annotate_browser__toggle_source(struct annotate_browser *browser,
+					    struct evsel *evsel)
+{
+	struct annotation *notes = browser__annotation(&browser->b);
+	struct annotation_line *al;
+	off_t offset = browser->b.index - browser->b.top_idx;
+
+	if (browser->b.nr_entries == 0)
+		return false;
+
+	browser->b.seek(&browser->b, offset, SEEK_CUR);
+	al = list_entry(browser->b.top, struct annotation_line, node);
+
+	if (!annotate_opts.annotate_src)
+		annotate_opts.annotate_src = true;
+
+	/*
+	 * It's about to get source code annotation for the first time.
+	 * Drop the existing annotation_lines and get the new one with source.
+	 * And then move to the original line at the same asm index.
+	 */
+	if (annotate_opts.hide_src_code && !notes->src->tried_source) {
+		struct map_symbol *ms = browser->b.priv;
+		int orig_idx_asm = al->idx_asm;
+
+		/* annotate again with source code info */
+		annotate_opts.hide_src_code = false;
+		annotated_source__purge(notes->src);
+		symbol__annotate2(ms, evsel, &browser->arch);
+		annotate_opts.hide_src_code = true;
+
+		/* should be after annotated_source__purge() */
+		notes->src->tried_source = true;
+
+		if (!annotation__has_source(notes))
+			ui__warning("Annotation has no source code.");
+
+		browser->b.entries = &notes->src->source;
+		al = annotate_browser__find_new_asm_line(browser, orig_idx_asm);
+		if (unlikely(al == NULL)) {
+			al = list_first_entry(&notes->src->source,
+					      struct annotation_line, node);
+		}
+		browser->b.seek(&browser->b, al->idx_asm, SEEK_SET);
+	}
+
+	if (annotate_opts.hide_src_code) {
+		if (al->idx_asm < offset)
+			offset = al->idx;
+
+		browser->b.nr_entries = notes->src->nr_entries;
+		annotate_opts.hide_src_code = false;
+		browser->b.seek(&browser->b, -offset, SEEK_CUR);
+		browser->b.top_idx = al->idx - offset;
+		browser->b.index = al->idx;
+	} else {
+		if (al->idx_asm < 0) {
+			/* move cursor to next asm line */
+			al = annotate_browser__find_next_asm_line(browser, al);
+			if (!al) {
+				browser->b.seek(&browser->b, -offset, SEEK_CUR);
+				return false;
+			}
+		}
+
+		if (al->idx_asm < offset)
+			offset = al->idx_asm;
+
+		browser->b.nr_entries = notes->src->nr_asm_entries;
+		annotate_opts.hide_src_code = true;
+		browser->b.seek(&browser->b, -offset, SEEK_CUR);
+		browser->b.top_idx = al->idx_asm - offset;
+		browser->b.index = al->idx_asm;
+	}
+
+	if (annotate_opts.hide_src_code_on_title)
+		annotate_opts.hide_src_code_on_title = false;
+
+	return true;
+}
+
+#define SYM_TITLE_MAX_SIZE (PATH_MAX + 64)
+
+static void annotate_browser__show_full_location(struct ui_browser *browser)
+{
+	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
+	struct disasm_line *cursor = disasm_line(ab->selection);
+	struct annotation_line *al = &cursor->al;
+
+	if (al->offset != -1)
+		ui_helpline__puts("Only available for source code lines.");
+	else if (al->fileloc == NULL)
+		ui_helpline__puts("No source file location.");
+	else {
+		char help_line[SYM_TITLE_MAX_SIZE];
+		sprintf (help_line, "Source file location: %s", al->fileloc);
+		ui_helpline__puts(help_line);
+	}
+}
+
+static void ui_browser__init_asm_mode(struct ui_browser *browser)
+{
+	struct annotation *notes = browser__annotation(browser);
+	browser->nr_entries = notes->src->nr_asm_entries;
+	ui_browser__reset_index(browser);
+}
+
+static int sym_title(struct symbol *sym, struct map *map, char *title,
+		     size_t sz, int percent_type)
+{
+	return snprintf(title, sz, "%s  %s [Percent: %s] %s", sym->name,
+			dso__long_name(map__dso(map)),
+			percent_type_str(percent_type),
+			annotate_opts.code_with_type ? "[Type]" : "");
+}
+
+static void annotate_browser__show_function_title(struct annotate_browser *browser)
+{
+	struct ui_browser *b = &browser->b;
+	struct map_symbol *ms = b->priv;
+	struct symbol *sym = ms->sym;
+	char title[SYM_TITLE_MAX_SIZE];
+
+	sym_title(sym, ms->map, title, sizeof(title), annotate_opts.percent_type);
+
+	ui_browser__gotorc_title(b, 0, 0);
+	ui_browser__set_color(b, HE_COLORSET_ROOT);
+	ui_browser__write_nstring(b, title, b->width + 1);
+}
+
+/*
+ * This can be called from external jumps, i.e. jumps from one function
+ * to another, like from the kernel's entry_SYSCALL_64 function to the
+ * swapgs_restore_regs_and_return_to_usermode() function.
+ *
+ * So all we check here is that dl->ops.target.sym is set, if it is, just
+ * go to that function and when exiting from its disassembly, come back
+ * to the calling function.
+ */
+static bool annotate_browser__callq(struct annotate_browser *browser,
+				    struct evsel *evsel,
+				    struct hist_browser_timer *hbt)
+{
+	struct map_symbol *ms = browser->b.priv, target_ms;
+	struct disasm_line *dl = disasm_line(browser->selection);
+	struct annotation *notes;
+
+	if (!dl->ops.target.sym) {
+		ui_helpline__puts("The called function was not found.");
+		return true;
+	}
+
+	notes = symbol__annotation(dl->ops.target.sym);
+	annotation__lock(notes);
+
+	if (!symbol__hists(dl->ops.target.sym, evlist__nr_entries(evsel->evlist))) {
+		annotation__unlock(notes);
+		ui__warning("Not enough memory for annotating '%s' symbol!\n",
+			    dl->ops.target.sym->name);
+		return true;
+	}
+
+	target_ms.thread = ms->thread;
+	target_ms.map = ms->map;
+	target_ms.sym = dl->ops.target.sym;
+	annotation__unlock(notes);
+	__hist_entry__tui_annotate(browser->he, &target_ms, evsel, hbt, NO_ADDR);
+
+	/*
+	 * The annotate_browser above changed the title with the target function
+	 * and now it's back to the original function.  Refresh the header line
+	 * for the original function again.
+	 */
+	annotate_browser__show_function_title(browser);
+	return true;
+}
+
+static
+struct disasm_line *annotate_browser__find_offset(struct annotate_browser *browser,
+					  s64 offset, s64 *idx)
+{
+	struct annotation *notes = browser__annotation(&browser->b);
+	struct disasm_line *pos;
+
+	*idx = 0;
+	list_for_each_entry(pos, &notes->src->source, al.node) {
+		if (pos->al.offset == offset)
+			return pos;
+		if (!annotation_line__filter(&pos->al))
+			++*idx;
+	}
+
+	return NULL;
+}
+
+static bool annotate_browser__jump(struct annotate_browser *browser,
+				   struct evsel *evsel,
+				   struct hist_browser_timer *hbt)
+{
+	struct disasm_line *dl = disasm_line(browser->selection);
+	u64 offset;
+	s64 idx;
+
+	if (!ins__is_jump(&dl->ins))
+		return false;
+
+	if (dl->ops.target.outside) {
+		annotate_browser__callq(browser, evsel, hbt);
+		return true;
+	}
+
+	offset = dl->ops.target.offset;
+	dl = annotate_browser__find_offset(browser, offset, &idx);
+	if (dl == NULL) {
+		ui_helpline__printf("Invalid jump offset: %" PRIx64, offset);
+		return true;
+	}
+
+	annotate_browser__set_top(browser, &dl->al, idx);
+
+	return true;
+}
+
+static
+struct annotation_line *annotate_browser__find_string(struct annotate_browser *browser,
+					  char *s, s64 *idx)
+{
+	struct annotation *notes = browser__annotation(&browser->b);
+	struct annotation_line *al = browser->selection;
+
+	*idx = browser->b.index;
+	list_for_each_entry_continue(al, &notes->src->source, node) {
+		if (annotation_line__filter(al))
+			continue;
+
+		++*idx;
+
+		if (al->line && strstr(al->line, s) != NULL)
+			return al;
+	}
+
+	return NULL;
+}
+
+static bool __annotate_browser__search(struct annotate_browser *browser)
+{
+	struct annotation_line *al;
+	s64 idx;
+
+	al = annotate_browser__find_string(browser, browser->search_bf, &idx);
+	if (al == NULL) {
+		ui_helpline__puts("String not found!");
+		return false;
+	}
+
+	annotate_browser__set_top(browser, al, idx);
+	browser->searching_backwards = false;
+	return true;
+}
+
+static
+struct annotation_line *annotate_browser__find_string_reverse(struct annotate_browser *browser,
+						  char *s, s64 *idx)
+{
+	struct annotation *notes = browser__annotation(&browser->b);
+	struct annotation_line *al = browser->selection;
+
+	*idx = browser->b.index;
+	list_for_each_entry_continue_reverse(al, &notes->src->source, node) {
+		if (annotation_line__filter(al))
+			continue;
+
+		--*idx;
+
+		if (al->line && strstr(al->line, s) != NULL)
+			return al;
+	}
+
+	return NULL;
+}
+
+static bool __annotate_browser__search_reverse(struct annotate_browser *browser)
+{
+	struct annotation_line *al;
+	s64 idx;
+
+	al = annotate_browser__find_string_reverse(browser, browser->search_bf, &idx);
+	if (al == NULL) {
+		ui_helpline__puts("String not found!");
+		return false;
+	}
+
+	annotate_browser__set_top(browser, al, idx);
+	browser->searching_backwards = true;
+	return true;
+}
+
+static bool annotate_browser__search_window(struct annotate_browser *browser,
+					    int delay_secs)
+{
+	if (ui_browser__input_window("Search", "String: ", browser->search_bf,
+				     "ENTER: OK, ESC: Cancel",
+				     delay_secs * 2) != K_ENTER ||
+	    !*browser->search_bf)
+		return false;
+
+	return true;
+}
+
+static bool annotate_browser__search(struct annotate_browser *browser, int delay_secs)
+{
+	if (annotate_browser__search_window(browser, delay_secs))
+		return __annotate_browser__search(browser);
+
+	return false;
+}
+
+static bool annotate_browser__continue_search(struct annotate_browser *browser,
+					      int delay_secs)
+{
+	if (!*browser->search_bf)
+		return annotate_browser__search(browser, delay_secs);
+
+	return __annotate_browser__search(browser);
+}
+
+static bool annotate_browser__search_reverse(struct annotate_browser *browser,
+					   int delay_secs)
+{
+	if (annotate_browser__search_window(browser, delay_secs))
+		return __annotate_browser__search_reverse(browser);
+
+	return false;
+}
+
+static
+bool annotate_browser__continue_search_reverse(struct annotate_browser *browser,
+					       int delay_secs)
+{
+	if (!*browser->search_bf)
+		return annotate_browser__search_reverse(browser, delay_secs);
+
+	return __annotate_browser__search_reverse(browser);
+}
+
+static int annotate_browser__show(struct annotate_browser *browser, char *title, const char *help)
+{
+	if (ui_browser__show(&browser->b, title, help) < 0)
+		return -1;
+
+	annotate_browser__show_function_title(browser);
+	return 0;
+}
+
+static void
+switch_percent_type(struct annotation_options *opts, bool base)
+{
+	switch (opts->percent_type) {
+	case PERCENT_HITS_LOCAL:
+		if (base)
+			opts->percent_type = PERCENT_PERIOD_LOCAL;
+		else
+			opts->percent_type = PERCENT_HITS_GLOBAL;
+		break;
+	case PERCENT_HITS_GLOBAL:
+		if (base)
+			opts->percent_type = PERCENT_PERIOD_GLOBAL;
+		else
+			opts->percent_type = PERCENT_HITS_LOCAL;
+		break;
+	case PERCENT_PERIOD_LOCAL:
+		if (base)
+			opts->percent_type = PERCENT_HITS_LOCAL;
+		else
+			opts->percent_type = PERCENT_PERIOD_GLOBAL;
+		break;
+	case PERCENT_PERIOD_GLOBAL:
+		if (base)
+			opts->percent_type = PERCENT_HITS_GLOBAL;
+		else
+			opts->percent_type = PERCENT_PERIOD_LOCAL;
+		break;
+	default:
+		WARN_ON(1);
+	}
+}
+
+static int annotate__scnprintf_title(struct hists *hists, char *bf, size_t size)
+{
+	int printed = hists__scnprintf_title(hists, bf, size);
+
+	if (!annotate_opts.hide_src_code_on_title) {
+		printed += scnprintf(bf + printed, size - printed, " [source: %s]",
+				     annotate_opts.hide_src_code ? "OFF" : "On");
+	}
+
+	return printed;
+}
+
+static void annotate_browser__debuginfo_warning(struct annotate_browser *browser)
+{
+	struct map_symbol *ms = browser->b.priv;
+	struct dso *dso = map__dso(ms->map);
+
+	if (browser->dbg == NULL && annotate_opts.code_with_type &&
+	    !dso__debuginfo_warned(dso)) {
+		ui__warning("DWARF debuginfo not found.\n\n"
+			    "Data-type in this DSO will not be displayed.\n"
+			    "Please make sure to have debug information.");
+		dso__set_debuginfo_warned(dso);
+	}
+}
+
+static s64 annotate_browser__curr_hot_offset(struct annotate_browser *browser)
+{
+	struct annotation_line *al = NULL;
+
+	if (browser->curr_hot)
+		al = rb_entry(browser->curr_hot, struct annotation_line, rb_node);
+
+	return al ? al->offset : 0;
+}
+
+static void annotate_browser__symbol_annotate_error(struct annotate_browser *browser, int err)
+{
+	struct map_symbol *ms = browser->b.priv;
+	struct symbol *sym = ms->sym;
+	struct dso *dso = map__dso(ms->map);
+	char msg[BUFSIZ];
+
+	dso__set_annotate_warned(dso);
+	symbol__strerror_disassemble(ms, err, msg, sizeof(msg));
+	ui__error("Couldn't annotate %s:\n%s", sym->name, msg);
+}
+
+static int annotate_browser__run(struct annotate_browser *browser,
+				 struct evsel *evsel,
+				 struct hist_browser_timer *hbt)
+{
+	struct rb_node *nd = NULL;
+	struct hists *hists = evsel__hists(evsel);
+	struct map_symbol *ms = browser->b.priv;
+	struct symbol *sym = ms->sym;
+	struct annotation *notes = symbol__annotation(ms->sym);
+	const char *help = "Press 'h' for help on key bindings";
+	int delay_secs = hbt ? hbt->refresh : 0;
+	char *br_cntr_text = NULL;
+	char title[256];
+	int key;
+
+	annotate__scnprintf_title(hists, title, sizeof(title));
+	if (annotate_browser__show(browser, title, help) < 0)
+		return -1;
+
+	annotate_browser__calc_percent(browser, evsel);
+
+	if (browser->selection != NULL) {
+		browser->curr_hot = &browser->selection->rb_node;
+		browser->b.use_navkeypressed = false;
+	}
+
+	if (browser->curr_hot) {
+		annotate_browser__set_rb_top(browser, browser->curr_hot);
+		browser->b.navkeypressed = false;
+	}
+
+	nd = browser->curr_hot;
+
+	annotation_br_cntr_abbr_list(&br_cntr_text, evsel, false);
+
+	annotate_browser__debuginfo_warning(browser);
+
+	while (1) {
+		key = ui_browser__run(&browser->b, delay_secs);
+
+		if (delay_secs != 0) {
+			annotate_browser__calc_percent(browser, evsel);
+			/*
+			 * Current line focus got out of the list of most active
+			 * lines, NULL it so that if TAB|UNTAB is pressed, we
+			 * move to curr_hot (current hottest line).
+			 */
+			if (nd != NULL && RB_EMPTY_NODE(nd))
+				nd = NULL;
+		}
+
+		switch (key) {
+		case K_TIMER:
+			if (hbt)
+				hbt->timer(hbt->arg);
+
+			if (delay_secs != 0) {
+				symbol__annotate_decay_histogram(sym, evsel);
+				annotate__scnprintf_title(hists, title, sizeof(title));
+				annotate_browser__show(browser, title, help);
+			}
+			continue;
+		case K_TAB:
+			if (nd != NULL) {
+				nd = rb_prev(nd);
+				if (nd == NULL)
+					nd = rb_last(&browser->entries);
+			} else
+				nd = browser->curr_hot;
+			break;
+		case K_UNTAB:
+			if (nd != NULL) {
+				nd = rb_next(nd);
+				if (nd == NULL)
+					nd = rb_first(&browser->entries);
+			} else
+				nd = browser->curr_hot;
+			break;
+		case K_F1:
+		case 'h':
+			ui_browser__help_window(&browser->b,
+		"UP/DOWN/PGUP\n"
+		"PGDN/SPACE    Navigate\n"
+		"</>           Move to prev/next symbol\n"
+		"q/ESC/CTRL+C  Exit\n\n"
+		"ENTER         Go to target\n"
+		"H             Go to hottest instruction\n"
+		"TAB/shift+TAB Cycle thru hottest instructions\n"
+		"j             Toggle showing jump to target arrows\n"
+		"J             Toggle showing number of jump sources on targets\n"
+		"n             Search next string\n"
+		"o             Toggle disassembler output/simplified view\n"
+		"O             Bump offset level (jump targets -> +call -> all -> cycle thru)\n"
+		"s             Toggle source code view\n"
+		"t             Circulate percent, total period, samples view\n"
+		"c             Show min/max cycle\n"
+		"/             Search string\n"
+		"k             Toggle line numbers\n"
+		"l             Show full source file location\n"
+		"P             Print to [symbol_name].annotation file.\n"
+		"r             Run available scripts\n"
+		"p             Toggle percent type [local/global]\n"
+		"b             Toggle percent base [period/hits]\n"
+		"B             Branch counter abbr list (Optional)\n"
+		"?             Search string backwards\n"
+		"f             Toggle showing offsets to full address\n"
+		"T             Toggle data type display\n");
+			continue;
+		case 'r':
+			script_browse(NULL, NULL);
+			annotate_browser__show(browser, title, help);
+			continue;
+		case 'k':
+			annotate_opts.show_linenr = !annotate_opts.show_linenr;
+			continue;
+		case 'l':
+			annotate_browser__show_full_location (&browser->b);
+			continue;
+		case 'H':
+			nd = browser->curr_hot;
+			break;
+		case 's': {
+			struct annotation_line *al = NULL;
+			s64 offset = annotate_browser__curr_hot_offset(browser);
+
+			if (annotate_browser__toggle_source(browser, evsel))
+				ui_helpline__puts(help);
+
+			/* Update the annotation browser's rb_tree, and reset the nd */
+			annotate_browser__calc_percent(browser, evsel);
+			/* Try to find the same asm line as before */
+			al = annotated_source__get_line(notes->src, offset);
+			browser->curr_hot = al ? &al->rb_node : NULL;
+			nd = browser->curr_hot;
+
+			annotate__scnprintf_title(hists, title, sizeof(title));
+			annotate_browser__show(browser, title, help);
+			continue;
+		}
+		case 'o':
+			annotate_opts.use_offset = !annotate_opts.use_offset;
+			annotation__update_column_widths(notes);
+			continue;
+		case 'O':
+			if (++annotate_opts.offset_level > ANNOTATION__MAX_OFFSET_LEVEL)
+				annotate_opts.offset_level = ANNOTATION__MIN_OFFSET_LEVEL;
+			continue;
+		case 'j':
+			annotate_opts.jump_arrows = !annotate_opts.jump_arrows;
+			continue;
+		case 'J':
+			annotate_opts.show_nr_jumps = !annotate_opts.show_nr_jumps;
+			annotation__update_column_widths(notes);
+			continue;
+		case '/':
+			if (annotate_browser__search(browser, delay_secs)) {
+show_help:
+				ui_helpline__puts(help);
+			}
+			continue;
+		case 'n':
+			if (browser->searching_backwards ?
+			    annotate_browser__continue_search_reverse(browser, delay_secs) :
+			    annotate_browser__continue_search(browser, delay_secs))
+				goto show_help;
+			continue;
+		case '?':
+			if (annotate_browser__search_reverse(browser, delay_secs))
+				goto show_help;
+			continue;
+		case 'D': {
+			static int seq;
+			ui_helpline__pop();
+			ui_helpline__fpush("%d: nr_ent=%d, height=%d, idx=%d, top_idx=%d, nr_asm_entries=%d",
+					   seq++, browser->b.nr_entries,
+					   browser->b.height,
+					   browser->b.index,
+					   browser->b.top_idx,
+					   notes->src->nr_asm_entries);
+		}
+			continue;
+		case K_ENTER:
+		case K_RIGHT:
+		{
+			struct disasm_line *dl = disasm_line(browser->selection);
+
+			if (browser->selection == NULL)
+				ui_helpline__puts("Huh? No selection. Report to linux-kernel@vger.kernel.org");
+			else if (browser->selection->offset == -1)
+				ui_helpline__puts("Actions are only available for assembly lines.");
+			else if (!dl->ins.ops)
+				goto show_sup_ins;
+			else if (ins__is_ret(&dl->ins))
+				goto out;
+			else if (!(annotate_browser__jump(browser, evsel, hbt) ||
+				     annotate_browser__callq(browser, evsel, hbt))) {
+show_sup_ins:
+				ui_helpline__puts("Actions are only available for function call/return & jump/branch instructions.");
+			}
+			continue;
+		}
+		case 'P':
+			map_symbol__annotation_dump(ms, evsel, browser->he);
+			continue;
+		case 't':
+			if (symbol_conf.show_total_period) {
+				symbol_conf.show_total_period = false;
+				symbol_conf.show_nr_samples = true;
+			} else if (symbol_conf.show_nr_samples)
+				symbol_conf.show_nr_samples = false;
+			else
+				symbol_conf.show_total_period = true;
+			annotation__update_column_widths(notes);
+			continue;
+		case 'c':
+			if (annotate_opts.show_minmax_cycle)
+				annotate_opts.show_minmax_cycle = false;
+			else
+				annotate_opts.show_minmax_cycle = true;
+			annotation__update_column_widths(notes);
+			continue;
+		case 'p':
+		case 'b':
+			switch_percent_type(&annotate_opts, key == 'b');
+			annotate__scnprintf_title(hists, title, sizeof(title));
+			annotate_browser__show(browser, title, help);
+			continue;
+		case 'B':
+			if (br_cntr_text)
+				ui_browser__help_window(&browser->b, br_cntr_text);
+			else {
+				ui_browser__help_window(&browser->b,
+							"\n The branch counter is not available.\n");
+			}
+			continue;
+		case 'f':
+			annotation__toggle_full_addr(notes, ms);
+			continue;
+		case 'T':
+			annotate_opts.code_with_type ^= 1;
+			if (browser->dbg == NULL)
+				browser->dbg = dso__debuginfo(map__dso(ms->map));
+			if (browser->type_hash == NULL) {
+				browser->type_hash = hashmap__new(type_hash, type_equal,
+								  /*ctx=*/NULL);
+			}
+			annotate_browser__show(browser, title, help);
+			annotate_browser__debuginfo_warning(browser);
+			continue;
+		case K_LEFT:
+		case '<':
+		case '>':
+		case K_ESC:
+		case 'q':
+		case CTRL('c'):
+			goto out;
+		default:
+			ui_browser__warn_unhandled_hotkey(&browser->b, key, delay_secs, ", use 'h'/F1 to see actions");
+			continue;
+		}
+
+		if (nd != NULL)
+			annotate_browser__set_rb_top(browser, nd);
+	}
+out:
+	ui_browser__hide(&browser->b);
+	free(br_cntr_text);
+	return key;
+}
+
+int hist_entry__tui_annotate(struct hist_entry *he, struct evsel *evsel,
+			     struct hist_browser_timer *hbt, u64 al_addr)
+{
+	/* reset abort key so that it can get Ctrl-C as a key */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+	SLtty_set_suspend_state(true);
+
+	return __hist_entry__tui_annotate(he, &he->ms, evsel, hbt, al_addr);
+}
+
+int __hist_entry__tui_annotate(struct hist_entry *he, struct map_symbol *ms,
+			       struct evsel *evsel,
+			       struct hist_browser_timer *hbt, u64 al_addr)
+{
+	struct symbol *sym = ms->sym;
+	struct annotation *notes = symbol__annotation(sym);
+	struct annotate_browser browser = {
+		.b = {
+			.refresh = annotate_browser__refresh,
+			.seek	 = ui_browser__list_head_seek,
+			.write	 = annotate_browser__write,
+			.filter  = disasm_line__filter,
+			.extra_title_lines = 1, /* for hists__scnprintf_title() */
+			.priv	 = ms,
+			.use_navkeypressed = true,
+		},
+		.he = he,
+		.evsel = evsel,
+	};
+	struct dso *dso;
+	int ret = -1, err;
+	int not_annotated = list_empty(&notes->src->source);
+
+	if (sym == NULL)
+		return -1;
+
+	dso = map__dso(ms->map);
+	if (dso__annotate_warned(dso))
+		return -1;
+
+	if (not_annotated || !symbol__is_annotate2(sym)) {
+		err = symbol__annotate2(ms, evsel, &browser.arch);
+		if (err) {
+			annotate_browser__symbol_annotate_error(&browser, err);
+			return -1;
+		}
+
+		if (!annotate_opts.hide_src_code) {
+			notes->src->tried_source = true;
+			if (!annotation__has_source(notes))
+				ui__warning("Annotation has no source code.");
+		}
+	} else {
+		err = map_symbol__get_arch(ms, &browser.arch);
+		if (err) {
+			annotate_browser__symbol_annotate_error(&browser, err);
+			return -1;
+		}
+	}
+
+	/* Copy necessary information when it's called from perf top */
+	if (hbt != NULL && he != &annotate_he) {
+		annotate_he.hists = he->hists;
+		annotate_he.thread = thread__get(he->thread);
+		annotate_he.cpumode = he->cpumode;
+		map_symbol__copy(&annotate_he.ms, ms);
+
+		browser.he = &annotate_he;
+	}
+
+	ui_helpline__push("Press ESC to exit");
+
+	if (annotate_opts.code_with_type) {
+		browser.dbg = dso__debuginfo(dso);
+		browser.type_hash = hashmap__new(type_hash, type_equal, /*ctx=*/NULL);
+	}
+
+	browser.b.width = notes->src->widths.max_line_len;
+	browser.b.nr_entries = notes->src->nr_entries;
+	browser.b.entries = &notes->src->source;
+	browser.b.width += 18; /* Percentage */
+
+	if (annotate_opts.hide_src_code)
+		ui_browser__init_asm_mode(&browser.b);
+
+	/*
+	 * If al_addr is set, it means that there should be a line
+	 * intentionally selected, not based on the percentages
+	 * which caculated by the event sampling. In this case, we
+	 * convey this information into the browser selection, where
+	 * the selection in other cases should be empty.
+	 */
+	if (al_addr != NO_ADDR) {
+		struct annotation_line *al = annotated_source__get_line(notes->src,
+			al_addr - sym->start);
+
+		browser.selection = al;
+	}
+
+	ret = annotate_browser__run(&browser, evsel, hbt);
+
+	debuginfo__delete(browser.dbg);
+
+	if (!IS_ERR_OR_NULL(browser.type_hash)) {
+		struct hashmap_entry *cur;
+		size_t bkt;
+
+		hashmap__for_each_entry(browser.type_hash, cur, bkt)
+			zfree(&cur->pvalue);
+		hashmap__free(browser.type_hash);
+	}
+
+	if (not_annotated && !notes->src->tried_source)
+		annotated_source__purge(notes->src);
+
+	if (hbt != NULL && he != &annotate_he) {
+		thread__zput(annotate_he.thread);
+		map_symbol__exit(&annotate_he.ms);
+	}
+
+	return ret;
+}
diff --git a/tools/perf/ui/browsers/c2c-function.c b/tools/perf/ui/browsers/c2c-function.c
new file mode 100644
index 000000000..3d23e9d84
--- /dev/null
+++ b/tools/perf/ui/browsers/c2c-function.c
@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * C2C function browser - TUI front end for function-level sharing analysis
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <sys/ttydefaults.h>
+#include <linux/rbtree.h>
+#include <linux/zalloc.h>
+
+#include "../browser.h"
+#include "../keysyms.h"
+#include "../libslang.h"
+#include "../ui.h"
+#include "../../util/c2c.h"
+#include "../../util/debug.h"
+#include "../../util/hist.h"
+#include "../../util/symbol.h"
+#include "hists.h"
+
+struct c2c_function_browser {
+	struct hist_browser	hb;
+	unsigned int		(*orig_refresh)(struct ui_browser *browser);
+	int			(*browse_cacheline)(struct hist_entry *he);
+};
+
+/*
+ * Count visible entries in @root, descending only through visible, unfolded
+ * parents. Match hists__filter_entries(), which drives generic browser
+ * navigation, so the count cannot include rows the browser skips.
+ */
+static u64
+c2c_function__nr_visible_rows(struct rb_root_cached *root, float min_pcnt)
+{
+	struct rb_node *nd;
+	u64 rows = 0;
+
+	for (nd = rb_first_cached(root); nd; nd = rb_next(nd)) {
+		struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
+
+		/*
+		 * The generic refresh folds filtered parents and therefore hides
+		 * their subtree. A percentage-rejected parent is merely skipped;
+		 * if it is unfolded, qualifying descendants are still rendered.
+		 */
+		if (he->filtered)
+			continue;
+
+		if (hist_entry__get_percent_limit(he) >= min_pcnt)
+			rows++;
+		if (he->has_children && he->unfolded)
+			rows += c2c_function__nr_visible_rows(&he->hroot_out,
+							     min_pcnt);
+	}
+	return rows;
+}
+
+static void
+c2c_function_browser__update_nr_entries(struct c2c_function_browser *browser)
+{
+	u64 nr_entries;
+
+	nr_entries = c2c_function__nr_visible_rows(&browser->hb.hists->entries,
+						   browser->hb.min_pcnt);
+	browser->hb.nr_non_filtered_entries = nr_entries;
+	browser->hb.b.nr_entries = nr_entries;
+}
+
+static unsigned int c2c_function_browser__refresh(struct ui_browser *ui_browser)
+{
+	struct hist_browser *hist_browser = container_of(ui_browser, struct hist_browser, b);
+	struct c2c_function_browser *browser;
+
+	browser = container_of(hist_browser, struct c2c_function_browser, hb);
+	c2c_function_browser__update_nr_entries(browser);
+	return browser->orig_refresh(ui_browser);
+}
+
+static int c2c_function_browser__title(struct hist_browser *browser,
+				       char *bf, size_t size)
+{
+	scnprintf(bf, size,
+		  "Shared Data Functions Table     (%" PRIu64 " entries, sorted on Cycles %%)",
+		  browser->hists->nr_non_filtered_entries);
+	return 0;
+}
+
+static struct c2c_function_browser *
+c2c_function_browser__new(struct hists *hists,
+			  int (*browse_cacheline)(struct hist_entry *he))
+{
+	struct c2c_function_browser *browser;
+
+	if (!hists)
+		return NULL;
+
+	browser = zalloc(sizeof(*browser));
+	if (!browser)
+		return NULL;
+
+	hist_browser__init(&browser->hb, hists);
+	browser->orig_refresh = browser->hb.b.refresh;
+	browser->hb.b.refresh = c2c_function_browser__refresh;
+	browser->browse_cacheline = browse_cacheline;
+
+	browser->hb.title = c2c_function_browser__title;
+	browser->hb.c2c_filter = true;
+	browser->hb.show_headers = true;
+	/* Keep title line count consistent with forcing headers on. */
+	browser->hb.b.extra_title_lines = hists->hpp_list->nr_header_lines;
+	browser->hb.min_pcnt = 0.0;
+
+	return browser;
+}
+
+static void c2c_function_browser__delete(struct c2c_function_browser *browser)
+{
+	free(browser);
+}
+
+static int
+c2c_browser__browse_cacheline(struct c2c_function_browser *browser,
+			      struct hist_entry *he_selection)
+{
+	struct hist_entry *he = c2c_function__find_cacheline(he_selection);
+
+	return he ? browser->browse_cacheline(he) : -1;
+}
+
+int perf_c2c__browse_function_view(struct c2c_function_view_args *args)
+{
+	struct c2c_function_browser *browser;
+	struct hists *hists;
+	bool saved_use_callchain = symbol_conf.use_callchain;
+	int key, ret;
+	static const char help[] =
+	" d             Display details for the selected level-3 cacheline\n"
+	" e/+           Expand/collapse the selected entry\n"
+	" TAB/ESC/q/^C  Return to the cacheline view\n";
+
+	if (!args || !args->cl_hists || !args->browse_cacheline)
+		return -EINVAL;
+
+	/*
+	 * Function view does not display callchains; cacheline detail temporarily
+	 * restores them.
+	 */
+	symbol_conf.use_callchain = false;
+
+	ret = c2c_function__build(args->cl_hists, args->cl_sort,
+				  args->symbol_full, &hists);
+	if (ret) {
+		if (ret == -EOPNOTSUPP)
+			ui__warning("The function view requires iaddr in --coalesce.\n");
+		else
+			ui__error("Failed to build function view hierarchy (ret=%d)\n", ret);
+		goto out;
+	}
+
+	browser = c2c_function_browser__new(hists, args->browse_cacheline);
+	if (!browser) {
+		ret = -ENOMEM;
+		goto out_reset;
+	}
+
+	/* Reset abort key so we can receive Ctrl-C as a key. */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+	SLtty_set_suspend_state(true);
+
+	while (1) {
+		c2c_function_browser__update_nr_entries(browser);
+		key = hist_browser__run(&browser->hb, "? - help", true, 0);
+
+		switch (key) {
+		case 'q':
+		case K_TAB:
+		case K_ESC:
+		case CTRL('c'):
+			goto browser_done;
+		case 'd':
+			/* Cacheline detail honors the user's callchain setting. */
+			symbol_conf.use_callchain = saved_use_callchain;
+			c2c_browser__browse_cacheline(browser, browser->hb.he_selection);
+			/*
+			 * Preserve any toggle made in the detail view, then
+			 * re-disable callchain for the function view.
+			 */
+			saved_use_callchain = symbol_conf.use_callchain;
+			symbol_conf.use_callchain = false;
+			break;
+		case '?':
+			ui_browser__help_window(&browser->hb.b, help);
+			break;
+		default:
+			break;
+		}
+	}
+
+browser_done:
+	c2c_function_browser__delete(browser);
+out_reset:
+	c2c_function__reset();
+out:
+	symbol_conf.use_callchain = saved_use_callchain;
+	return ret;
+}
diff --git a/tools/perf/ui/browsers/header.c b/tools/perf/ui/browsers/header.c
new file mode 100644
index 000000000..5b5ca32e3
--- /dev/null
+++ b/tools/perf/ui/browsers/header.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "ui/browser.h"
+#include "ui/keysyms.h"
+#include "ui/ui.h"
+#include "ui/util.h"
+#include "ui/libslang.h"
+#include "util/header.h"
+#include "util/session.h"
+
+#include <sys/ttydefaults.h>
+
+static void ui_browser__argv_write(struct ui_browser *browser,
+				   void *entry, int row)
+{
+	char **arg = entry;
+	char *str = *arg;
+	char empty[] = " ";
+	bool current_entry = ui_browser__is_current_entry(browser, row);
+	unsigned long offset = (unsigned long)browser->priv;
+
+	if (offset >= strlen(str))
+		str = empty;
+	else
+		str = str + offset;
+
+	ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
+						       HE_COLORSET_NORMAL);
+
+	ui_browser__write_nstring(browser, str, browser->width);
+}
+
+static int list_menu__run(struct ui_browser *menu)
+{
+	int key;
+	unsigned long offset;
+	static const char help[] =
+	"h/?/F1        Show this window\n"
+	"UP/DOWN/PGUP\n"
+	"PGDN/SPACE\n"
+	"LEFT/RIGHT    Navigate\n"
+	"q/ESC/CTRL+C  Exit browser";
+
+	if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
+		return -1;
+
+	while (1) {
+		key = ui_browser__run(menu, 0);
+
+		switch (key) {
+		case K_RIGHT:
+			offset = (unsigned long)menu->priv;
+			offset += 10;
+			menu->priv = (void *)offset;
+			continue;
+		case K_LEFT:
+			offset = (unsigned long)menu->priv;
+			if (offset >= 10)
+				offset -= 10;
+			menu->priv = (void *)offset;
+			continue;
+		case K_F1:
+		case 'h':
+		case '?':
+			ui_browser__help_window(menu, help);
+			continue;
+		case K_ESC:
+		case 'q':
+		case CTRL('c'):
+			key = -1;
+			break;
+		default:
+			ui_browser__warn_unhandled_hotkey(menu, key, 0, ", use 'h'/'?'/F1 to see actions");
+			continue;
+		}
+
+		break;
+	}
+
+	ui_browser__hide(menu);
+	return key;
+}
+
+static int ui__list_menu(int argc, char * const argv[])
+{
+	struct ui_browser menu = {
+		.entries    = (void *)argv,
+		.refresh    = ui_browser__argv_refresh,
+		.seek	    = ui_browser__argv_seek,
+		.write	    = ui_browser__argv_write,
+		.nr_entries = argc,
+	};
+
+	return list_menu__run(&menu);
+}
+
+int tui__header_window(struct perf_session *session)
+{
+	int i, argc = 0;
+	char **argv;
+	char *ptr, *pos;
+	size_t size;
+	FILE *fp = open_memstream(&ptr, &size);
+
+	perf_header__fprintf_info(session, fp, true);
+	fclose(fp);
+
+	for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
+		argc++;
+
+	argv = calloc(argc + 1, sizeof(*argv));
+	if (argv == NULL)
+		goto out;
+
+	argv[0] = pos = ptr;
+	for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
+		*pos++ = '\0';
+		argv[i] = pos;
+	}
+
+	BUG_ON(i != argc + 1);
+
+	ui__list_menu(argc, argv);
+
+out:
+	free(argv);
+	free(ptr);
+	return 0;
+}
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
new file mode 100644
index 000000000..c15874a49
--- /dev/null
+++ b/tools/perf/ui/browsers/hists.c
@@ -0,0 +1,3842 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <dirent.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/rbtree.h>
+#include <linux/string.h>
+#include <sys/ttydefaults.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+
+#include "../../util/debug.h"
+#include "../../util/dso.h"
+#include "../../util/callchain.h"
+#include "../../util/evsel.h"
+#include "../../util/evlist.h"
+#include "../../util/header.h"
+#include "../../util/hist.h"
+#include "../../util/machine.h"
+#include "../../util/map.h"
+#include "../../util/maps.h"
+#include "../../util/symbol.h"
+#include "../../util/map_symbol.h"
+#include "../../util/branch.h"
+#include "../../util/pstack.h"
+#include "../../util/sort.h"
+#include "../../util/top.h"
+#include "../../util/thread.h"
+#include "../../util/block-info.h"
+#include "../../util/util.h"
+#include "../../arch/common.h"
+
+#include "../browsers/hists.h"
+#include "../helpline.h"
+#include "../util.h"
+#include "../ui.h"
+#include "map.h"
+#include "annotate.h"
+#include "annotate-data.h"
+#include "srcline.h"
+#include "string2.h"
+#include "units.h"
+#include "time-utils.h"
+
+#include <linux/ctype.h>
+
+extern void hist_browser__init_hpp(void);
+
+static int hists_browser__scnprintf_title(struct hist_browser *browser, char *bf, size_t size);
+static void hist_browser__update_nr_entries(struct hist_browser *hb);
+
+static struct rb_node *hists__filter_entries(struct rb_node *nd,
+					     float min_pcnt);
+
+static bool hist_browser__has_filter(struct hist_browser *hb)
+{
+	return hists__has_filter(hb->hists) || hb->min_pcnt || symbol_conf.has_filter || hb->c2c_filter;
+}
+
+static int hist_browser__get_folding(struct hist_browser *browser)
+{
+	struct rb_node *nd;
+	struct hists *hists = browser->hists;
+	int unfolded_rows = 0;
+
+	for (nd = rb_first_cached(&hists->entries);
+	     (nd = hists__filter_entries(nd, browser->min_pcnt)) != NULL;
+	     nd = rb_hierarchy_next(nd)) {
+		struct hist_entry *he =
+			rb_entry(nd, struct hist_entry, rb_node);
+
+		if (he->leaf && he->unfolded)
+			unfolded_rows += he->nr_rows;
+	}
+	return unfolded_rows;
+}
+
+static void hist_browser__set_title_space(struct hist_browser *hb)
+{
+	struct ui_browser *browser = &hb->b;
+	struct hists *hists = hb->hists;
+	struct perf_hpp_list *hpp_list = hists->hpp_list;
+
+	browser->extra_title_lines = hb->show_headers ? hpp_list->nr_header_lines : 0;
+}
+
+static u32 hist_browser__nr_entries(struct hist_browser *hb)
+{
+	u32 nr_entries;
+
+	if (symbol_conf.report_hierarchy)
+		nr_entries = hb->nr_hierarchy_entries;
+	else if (hist_browser__has_filter(hb))
+		nr_entries = hb->nr_non_filtered_entries;
+	else
+		nr_entries = hb->hists->nr_entries;
+
+	hb->nr_callchain_rows = hist_browser__get_folding(hb);
+	return nr_entries + hb->nr_callchain_rows;
+}
+
+static void hist_browser__update_rows(struct hist_browser *hb)
+{
+	struct ui_browser *browser = &hb->b;
+	struct hists *hists = hb->hists;
+	struct perf_hpp_list *hpp_list = hists->hpp_list;
+	u16 index_row;
+
+	if (!hb->show_headers) {
+		browser->rows += browser->extra_title_lines;
+		browser->extra_title_lines = 0;
+		return;
+	}
+
+	browser->extra_title_lines = hpp_list->nr_header_lines;
+	browser->rows -= browser->extra_title_lines;
+	/*
+	 * Verify if we were at the last line and that line isn't
+	 * visible because we now show the header line(s).
+	 */
+	index_row = browser->index - browser->top_idx;
+	if (index_row >= browser->rows)
+		browser->index -= index_row - browser->rows + 1;
+}
+
+static void hist_browser__refresh_dimensions(struct ui_browser *browser)
+{
+	struct hist_browser *hb = container_of(browser, struct hist_browser, b);
+
+	/* 3 == +/- toggle symbol before actual hist_entry rendering */
+	browser->width = 3 + (hists__sort_list_width(hb->hists) + sizeof("[k]"));
+	/*
+ 	 * FIXME: Just keeping existing behaviour, but this really should be
+ 	 *	  before updating browser->width, as it will invalidate the
+ 	 *	  calculation above. Fix this and the fallout in another
+ 	 *	  changeset.
+ 	 */
+	ui_browser__refresh_dimensions(browser);
+}
+
+static void hist_browser__reset(struct hist_browser *browser)
+{
+	/*
+	 * The hists__remove_entry_filter() already folds non-filtered
+	 * entries so we can assume it has 0 callchain rows.
+	 */
+	browser->nr_callchain_rows = 0;
+
+	hist_browser__update_nr_entries(browser);
+	browser->b.nr_entries = hist_browser__nr_entries(browser);
+	hist_browser__refresh_dimensions(&browser->b);
+	ui_browser__reset_index(&browser->b);
+}
+
+static char tree__folded_sign(bool unfolded)
+{
+	return unfolded ? '-' : '+';
+}
+
+static char hist_entry__folded(const struct hist_entry *he)
+{
+	return he->has_children ? tree__folded_sign(he->unfolded) : ' ';
+}
+
+static char callchain_list__folded(const struct callchain_list *cl)
+{
+	return cl->has_children ? tree__folded_sign(cl->unfolded) : ' ';
+}
+
+static void callchain_list__set_folding(struct callchain_list *cl, bool unfold)
+{
+	cl->unfolded = unfold ? cl->has_children : false;
+}
+
+static int callchain_node__count_rows_rb_tree(struct callchain_node *node)
+{
+	int n = 0;
+	struct rb_node *nd;
+
+	for (nd = rb_first(&node->rb_root); nd; nd = rb_next(nd)) {
+		struct callchain_node *child = rb_entry(nd, struct callchain_node, rb_node);
+		struct callchain_list *chain;
+		char folded_sign = ' '; /* No children */
+
+		list_for_each_entry(chain, &child->val, list) {
+			++n;
+
+			/* We need this because we may not have children */
+			folded_sign = callchain_list__folded(chain);
+			if (folded_sign == '+')
+				break;
+		}
+
+		if (folded_sign == '-') /* Have children and they're unfolded */
+			n += callchain_node__count_rows_rb_tree(child);
+	}
+
+	return n;
+}
+
+static int callchain_node__count_flat_rows(struct callchain_node *node)
+{
+	struct callchain_list *chain;
+	char folded_sign = 0;
+	int n = 0;
+
+	list_for_each_entry(chain, &node->parent_val, list) {
+		if (!folded_sign) {
+			/* only check first chain list entry */
+			folded_sign = callchain_list__folded(chain);
+			if (folded_sign == '+')
+				return 1;
+		}
+		n++;
+	}
+
+	list_for_each_entry(chain, &node->val, list) {
+		if (!folded_sign) {
+			/* node->parent_val list might be empty */
+			folded_sign = callchain_list__folded(chain);
+			if (folded_sign == '+')
+				return 1;
+		}
+		n++;
+	}
+
+	return n;
+}
+
+static int callchain_node__count_folded_rows(struct callchain_node *node __maybe_unused)
+{
+	return 1;
+}
+
+static int callchain_node__count_rows(struct callchain_node *node)
+{
+	struct callchain_list *chain;
+	bool unfolded = false;
+	int n = 0;
+
+	if (callchain_param.mode == CHAIN_FLAT)
+		return callchain_node__count_flat_rows(node);
+	else if (callchain_param.mode == CHAIN_FOLDED)
+		return callchain_node__count_folded_rows(node);
+
+	list_for_each_entry(chain, &node->val, list) {
+		++n;
+
+		unfolded = chain->unfolded;
+	}
+
+	if (unfolded)
+		n += callchain_node__count_rows_rb_tree(node);
+
+	return n;
+}
+
+static int callchain__count_rows(struct rb_root *chain)
+{
+	struct rb_node *nd;
+	int n = 0;
+
+	for (nd = rb_first(chain); nd; nd = rb_next(nd)) {
+		struct callchain_node *node = rb_entry(nd, struct callchain_node, rb_node);
+		n += callchain_node__count_rows(node);
+	}
+
+	return n;
+}
+
+static int hierarchy_count_rows(struct hist_browser *hb, struct hist_entry *he,
+				bool include_children)
+{
+	int count = 0;
+	struct rb_node *node;
+	struct hist_entry *child;
+
+	if (he->leaf)
+		return callchain__count_rows(&he->sorted_chain);
+
+	if (he->has_no_entry)
+		return 1;
+
+	node = rb_first_cached(&he->hroot_out);
+	while (node) {
+		float percent;
+
+		child = rb_entry(node, struct hist_entry, rb_node);
+		percent = hist_entry__get_percent_limit(child);
+
+		if (!child->filtered && percent >= hb->min_pcnt) {
+			count++;
+
+			if (include_children && child->unfolded)
+				count += hierarchy_count_rows(hb, child, true);
+		}
+
+		node = rb_next(node);
+	}
+	return count;
+}
+
+static bool hist_entry__toggle_fold(struct hist_entry *he)
+{
+	if (!he)
+		return false;
+
+	if (!he->has_children)
+		return false;
+
+	he->unfolded = !he->unfolded;
+	return true;
+}
+
+static bool callchain_list__toggle_fold(struct callchain_list *cl)
+{
+	if (!cl)
+		return false;
+
+	if (!cl->has_children)
+		return false;
+
+	cl->unfolded = !cl->unfolded;
+	return true;
+}
+
+static void callchain_node__init_have_children_rb_tree(struct callchain_node *node)
+{
+	struct rb_node *nd = rb_first(&node->rb_root);
+
+	for (nd = rb_first(&node->rb_root); nd; nd = rb_next(nd)) {
+		struct callchain_node *child = rb_entry(nd, struct callchain_node, rb_node);
+		struct callchain_list *chain;
+		bool first = true;
+
+		list_for_each_entry(chain, &child->val, list) {
+			if (first) {
+				first = false;
+				chain->has_children = chain->list.next != &child->val ||
+							 !RB_EMPTY_ROOT(&child->rb_root);
+			} else
+				chain->has_children = chain->list.next == &child->val &&
+							 !RB_EMPTY_ROOT(&child->rb_root);
+		}
+
+		callchain_node__init_have_children_rb_tree(child);
+	}
+}
+
+static void callchain_node__init_have_children(struct callchain_node *node,
+					       bool has_sibling)
+{
+	struct callchain_list *chain;
+
+	chain = list_entry(node->val.next, struct callchain_list, list);
+	chain->has_children = has_sibling;
+
+	if (!list_empty(&node->val)) {
+		chain = list_entry(node->val.prev, struct callchain_list, list);
+		chain->has_children = !RB_EMPTY_ROOT(&node->rb_root);
+	}
+
+	callchain_node__init_have_children_rb_tree(node);
+}
+
+static void callchain__init_have_children(struct rb_root *root)
+{
+	struct rb_node *nd = rb_first(root);
+	bool has_sibling = nd && rb_next(nd);
+
+	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
+		struct callchain_node *node = rb_entry(nd, struct callchain_node, rb_node);
+		callchain_node__init_have_children(node, has_sibling);
+		if (callchain_param.mode == CHAIN_FLAT ||
+		    callchain_param.mode == CHAIN_FOLDED)
+			callchain_node__make_parent_list(node);
+	}
+}
+
+static void hist_entry__init_have_children(struct hist_entry *he)
+{
+	if (he->init_have_children)
+		return;
+
+	if (he->leaf) {
+		he->has_children = !RB_EMPTY_ROOT(&he->sorted_chain);
+		callchain__init_have_children(&he->sorted_chain);
+	} else {
+		he->has_children = !RB_EMPTY_ROOT(&he->hroot_out.rb_root);
+	}
+
+	he->init_have_children = true;
+}
+
+static bool hist_browser__selection_has_children(struct hist_browser *browser)
+{
+	struct hist_entry *he = browser->he_selection;
+	struct map_symbol *ms = browser->selection;
+
+	if (!he || !ms)
+		return false;
+
+	if (ms == &he->ms)
+	       return he->has_children;
+
+	return container_of(ms, struct callchain_list, ms)->has_children;
+}
+
+static bool hist_browser__selection_unfolded(struct hist_browser *browser)
+{
+	struct hist_entry *he = browser->he_selection;
+	struct map_symbol *ms = browser->selection;
+
+	if (!he || !ms)
+		return false;
+
+	if (ms == &he->ms)
+	       return he->unfolded;
+
+	return container_of(ms, struct callchain_list, ms)->unfolded;
+}
+
+static char *hist_browser__selection_sym_name(struct hist_browser *browser, char *bf, size_t size)
+{
+	struct hist_entry *he = browser->he_selection;
+	struct map_symbol *ms = browser->selection;
+	struct callchain_list *callchain_entry;
+
+	if (!he || !ms)
+		return NULL;
+
+	if (ms == &he->ms) {
+	       hist_entry__sym_snprintf(he, bf, size, 0);
+	       return bf + 4; // skip the level, e.g. '[k] '
+	}
+
+	callchain_entry = container_of(ms, struct callchain_list, ms);
+	return callchain_list__sym_name(callchain_entry, bf, size, browser->show_dso);
+}
+
+static bool hist_browser__toggle_fold(struct hist_browser *browser)
+{
+	struct hist_entry *he = browser->he_selection;
+	struct map_symbol *ms = browser->selection;
+	struct callchain_list *cl = container_of(ms, struct callchain_list, ms);
+	bool has_children;
+
+	if (!he || !ms)
+		return false;
+
+	if (ms == &he->ms)
+		has_children = hist_entry__toggle_fold(he);
+	else
+		has_children = callchain_list__toggle_fold(cl);
+
+	if (has_children) {
+		int child_rows = 0;
+
+		hist_entry__init_have_children(he);
+		browser->b.nr_entries -= he->nr_rows;
+
+		if (he->leaf)
+			browser->nr_callchain_rows -= he->nr_rows;
+		else
+			browser->nr_hierarchy_entries -= he->nr_rows;
+
+		if (symbol_conf.report_hierarchy)
+			child_rows = hierarchy_count_rows(browser, he, true);
+
+		if (he->unfolded) {
+			if (he->leaf)
+				he->nr_rows = callchain__count_rows(
+						&he->sorted_chain);
+			else
+				he->nr_rows = hierarchy_count_rows(browser, he, false);
+
+			/* account grand children */
+			if (symbol_conf.report_hierarchy)
+				browser->b.nr_entries += child_rows - he->nr_rows;
+
+			if (!he->leaf && he->nr_rows == 0) {
+				he->has_no_entry = true;
+				he->nr_rows = 1;
+			}
+		} else {
+			if (symbol_conf.report_hierarchy)
+				browser->b.nr_entries -= child_rows - he->nr_rows;
+
+			if (he->has_no_entry)
+				he->has_no_entry = false;
+
+			he->nr_rows = 0;
+		}
+
+		browser->b.nr_entries += he->nr_rows;
+
+		if (he->leaf)
+			browser->nr_callchain_rows += he->nr_rows;
+		else
+			browser->nr_hierarchy_entries += he->nr_rows;
+
+		return true;
+	}
+
+	/* If it doesn't have children, no toggling performed */
+	return false;
+}
+
+static int callchain_node__set_folding_rb_tree(struct callchain_node *node, bool unfold)
+{
+	int n = 0;
+	struct rb_node *nd;
+
+	for (nd = rb_first(&node->rb_root); nd; nd = rb_next(nd)) {
+		struct callchain_node *child = rb_entry(nd, struct callchain_node, rb_node);
+		struct callchain_list *chain;
+		bool has_children = false;
+
+		list_for_each_entry(chain, &child->val, list) {
+			++n;
+			callchain_list__set_folding(chain, unfold);
+			has_children = chain->has_children;
+		}
+
+		if (has_children)
+			n += callchain_node__set_folding_rb_tree(child, unfold);
+	}
+
+	return n;
+}
+
+static int callchain_node__set_folding(struct callchain_node *node, bool unfold)
+{
+	struct callchain_list *chain;
+	bool has_children = false;
+	int n = 0;
+
+	list_for_each_entry(chain, &node->val, list) {
+		++n;
+		callchain_list__set_folding(chain, unfold);
+		has_children = chain->has_children;
+	}
+
+	if (has_children)
+		n += callchain_node__set_folding_rb_tree(node, unfold);
+
+	return n;
+}
+
+static int callchain__set_folding(struct rb_root *chain, bool unfold)
+{
+	struct rb_node *nd;
+	int n = 0;
+
+	for (nd = rb_first(chain); nd; nd = rb_next(nd)) {
+		struct callchain_node *node = rb_entry(nd, struct callchain_node, rb_node);
+		n += callchain_node__set_folding(node, unfold);
+	}
+
+	return n;
+}
+
+static int hierarchy_set_folding(struct hist_browser *hb, struct hist_entry *he,
+				 bool unfold __maybe_unused)
+{
+	float percent;
+	struct rb_node *nd;
+	struct hist_entry *child;
+	int n = 0;
+
+	for (nd = rb_first_cached(&he->hroot_out); nd; nd = rb_next(nd)) {
+		child = rb_entry(nd, struct hist_entry, rb_node);
+		percent = hist_entry__get_percent_limit(child);
+		if (!child->filtered && percent >= hb->min_pcnt)
+			n++;
+	}
+
+	return n;
+}
+
+static void hist_entry__set_folding(struct hist_entry *he,
+				    struct hist_browser *hb, bool unfold)
+{
+	hist_entry__init_have_children(he);
+	he->unfolded = unfold ? he->has_children : false;
+
+	if (he->has_children) {
+		int n;
+
+		if (he->leaf)
+			n = callchain__set_folding(&he->sorted_chain, unfold);
+		else
+			n = hierarchy_set_folding(hb, he, unfold);
+
+		he->nr_rows = unfold ? n : 0;
+	} else
+		he->nr_rows = 0;
+}
+
+static void
+__hist_browser__set_folding(struct hist_browser *browser, bool unfold)
+{
+	struct rb_node *nd;
+	struct hist_entry *he;
+	double percent;
+
+	nd = rb_first_cached(&browser->hists->entries);
+	while (nd) {
+		he = rb_entry(nd, struct hist_entry, rb_node);
+
+		/* set folding state even if it's currently folded */
+		nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD);
+
+		hist_entry__set_folding(he, browser, unfold);
+
+		percent = hist_entry__get_percent_limit(he);
+		if (he->filtered || percent < browser->min_pcnt)
+			continue;
+
+		if (!he->depth || unfold)
+			browser->nr_hierarchy_entries++;
+		if (he->leaf)
+			browser->nr_callchain_rows += he->nr_rows;
+		else if (unfold && !hist_entry__has_hierarchy_children(he, browser->min_pcnt)) {
+			browser->nr_hierarchy_entries++;
+			he->has_no_entry = true;
+			he->nr_rows = 1;
+		} else
+			he->has_no_entry = false;
+	}
+}
+
+static void hist_browser__set_folding(struct hist_browser *browser, bool unfold)
+{
+	browser->nr_hierarchy_entries = 0;
+	browser->nr_callchain_rows = 0;
+	__hist_browser__set_folding(browser, unfold);
+
+	browser->b.nr_entries = hist_browser__nr_entries(browser);
+	/* Go to the start, we may be way after valid entries after a collapse */
+	ui_browser__reset_index(&browser->b);
+}
+
+static void hist_browser__set_folding_selected(struct hist_browser *browser, bool unfold)
+{
+	if (!browser->he_selection)
+		return;
+
+	if (unfold == browser->he_selection->unfolded)
+		return;
+
+	hist_browser__toggle_fold(browser);
+}
+
+static void ui_browser__warn_lost_events(struct ui_browser *browser)
+{
+	ui_browser__warning(browser, 4,
+		"Events are being lost, check IO/CPU overload!\n\n"
+		"You may want to run 'perf' using a RT scheduler policy:\n\n"
+		" perf top -r 80\n\n"
+		"Or reduce the sampling frequency.");
+}
+
+static int hist_browser__title(struct hist_browser *browser, char *bf, size_t size)
+{
+	return browser->title ? browser->title(browser, bf, size) : 0;
+}
+
+static int hist_browser__handle_hotkey(struct hist_browser *browser, bool warn_lost_event, char *title, size_t size, int key)
+{
+	switch (key) {
+	case K_TIMER: {
+		struct hist_browser_timer *hbt = browser->hbt;
+		struct evsel *evsel = hists_to_evsel(browser->hists);
+		u64 nr_entries;
+
+		WARN_ON_ONCE(!hbt);
+
+		if (hbt)
+			hbt->timer(hbt->arg);
+
+		if (hist_browser__has_filter(browser) || symbol_conf.report_hierarchy)
+			hist_browser__update_nr_entries(browser);
+
+		nr_entries = hist_browser__nr_entries(browser);
+		ui_browser__update_nr_entries(&browser->b, nr_entries);
+
+		if (warn_lost_event &&
+		    (evlist__stats(evsel->evlist)->nr_lost_warned !=
+		     evlist__stats(evsel->evlist)->nr_events[PERF_RECORD_LOST])) {
+			evlist__stats(evsel->evlist)->nr_lost_warned =
+				evlist__stats(evsel->evlist)->nr_events[PERF_RECORD_LOST];
+			ui_browser__warn_lost_events(&browser->b);
+		}
+
+		hist_browser__title(browser, title, size);
+		ui_browser__show_title(&browser->b, title);
+		break;
+	}
+	case 'D': { /* Debug */
+		struct hist_entry *h = rb_entry(browser->b.top, struct hist_entry, rb_node);
+		static int seq;
+
+		ui_helpline__pop();
+		ui_helpline__fpush("%d: nr_ent=(%d,%d), etl: %d, rows=%d, idx=%d, fve: idx=%d, row_off=%d, nrows=%d",
+				   seq++, browser->b.nr_entries, browser->hists->nr_entries,
+				   browser->b.extra_title_lines, browser->b.rows,
+				   browser->b.index, browser->b.top_idx, h->row_offset, h->nr_rows);
+	}
+		break;
+	case 'C':
+		/* Collapse the whole world. */
+		hist_browser__set_folding(browser, false);
+		break;
+	case 'c':
+		/* Collapse the selected entry. */
+		hist_browser__set_folding_selected(browser, false);
+		break;
+	case 'E':
+		/* Expand the whole world. */
+		hist_browser__set_folding(browser, true);
+		break;
+	case 'e':
+		/* Toggle expand/collapse the selected entry. */
+		hist_browser__toggle_fold(browser);
+		break;
+	case 'H':
+		browser->show_headers = !browser->show_headers;
+		hist_browser__update_rows(browser);
+		break;
+	case '+':
+		if (hist_browser__toggle_fold(browser))
+			break;
+		/* fall thru */
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+int hist_browser__run(struct hist_browser *browser, const char *help,
+		      bool warn_lost_event, int key)
+{
+	char title[160];
+	struct hist_browser_timer *hbt = browser->hbt;
+	int delay_secs = hbt ? hbt->refresh : 0;
+
+	browser->b.entries = &browser->hists->entries;
+	browser->b.nr_entries = hist_browser__nr_entries(browser);
+
+	hist_browser__title(browser, title, sizeof(title));
+
+	if (ui_browser__show(&browser->b, title, "%s", help) < 0)
+		return -1;
+
+	if (key && hist_browser__handle_hotkey(browser, warn_lost_event, title, sizeof(title), key))
+		goto out;
+
+	while (1) {
+		key = ui_browser__run(&browser->b, delay_secs);
+
+		if (hist_browser__handle_hotkey(browser, warn_lost_event, title, sizeof(title), key))
+			break;
+	}
+out:
+	ui_browser__hide(&browser->b);
+	return key;
+}
+
+struct callchain_print_arg {
+	/* for hists browser */
+	off_t	row_offset;
+	bool	is_current_entry;
+
+	/* for file dump */
+	FILE	*fp;
+	int	printed;
+};
+
+typedef void (*print_callchain_entry_fn)(struct hist_browser *browser,
+					 struct callchain_list *chain,
+					 const char *str, int offset,
+					 unsigned short row,
+					 struct callchain_print_arg *arg);
+
+static void hist_browser__show_callchain_entry(struct hist_browser *browser,
+					       struct callchain_list *chain,
+					       const char *str, int offset,
+					       unsigned short row,
+					       struct callchain_print_arg *arg)
+{
+	int color, width;
+	char folded_sign = callchain_list__folded(chain);
+	bool show_annotated = browser->show_dso && chain->ms.sym && symbol__annotation(chain->ms.sym)->src;
+
+	color = HE_COLORSET_NORMAL;
+	width = browser->b.width - (offset + 2);
+	if (ui_browser__is_current_entry(&browser->b, row)) {
+		browser->selection = &chain->ms;
+		color = HE_COLORSET_SELECTED;
+		arg->is_current_entry = true;
+	}
+
+	ui_browser__set_color(&browser->b, color);
+	ui_browser__gotorc(&browser->b, row, 0);
+	ui_browser__write_nstring(&browser->b, " ", offset);
+	ui_browser__printf(&browser->b, "%c", folded_sign);
+	ui_browser__write_graph(&browser->b, show_annotated ? SLSMG_RARROW_CHAR : ' ');
+	ui_browser__write_nstring(&browser->b, str, width);
+}
+
+static void hist_browser__fprintf_callchain_entry(struct hist_browser *b __maybe_unused,
+						  struct callchain_list *chain,
+						  const char *str, int offset,
+						  unsigned short row __maybe_unused,
+						  struct callchain_print_arg *arg)
+{
+	char folded_sign = callchain_list__folded(chain);
+
+	arg->printed += fprintf(arg->fp, "%*s%c %s\n", offset, " ",
+				folded_sign, str);
+}
+
+typedef bool (*check_output_full_fn)(struct hist_browser *browser,
+				     unsigned short row);
+
+static bool hist_browser__check_output_full(struct hist_browser *browser,
+					    unsigned short row)
+{
+	return browser->b.rows == row;
+}
+
+static bool hist_browser__check_dump_full(struct hist_browser *browser __maybe_unused,
+					  unsigned short row __maybe_unused)
+{
+	return false;
+}
+
+#define LEVEL_OFFSET_STEP 3
+
+static int hist_browser__show_callchain_list(struct hist_browser *browser,
+					     struct callchain_node *node,
+					     struct callchain_list *chain,
+					     unsigned short row, u64 total,
+					     bool need_percent, int offset,
+					     print_callchain_entry_fn print,
+					     struct callchain_print_arg *arg)
+{
+	char bf[1024], *alloc_str;
+	char buf[64], *alloc_str2;
+	const char *str;
+	int ret = 1;
+
+	if (arg->row_offset != 0) {
+		arg->row_offset--;
+		return 0;
+	}
+
+	alloc_str = NULL;
+	alloc_str2 = NULL;
+
+	str = callchain_list__sym_name(chain, bf, sizeof(bf),
+				       browser->show_dso);
+
+	if (symbol_conf.show_branchflag_count) {
+		callchain_list_counts__printf_value(chain, NULL,
+						    buf, sizeof(buf));
+
+		if (asprintf(&alloc_str2, "%s%s", str, buf) < 0)
+			str = "Not enough memory!";
+		else
+			str = alloc_str2;
+	}
+
+	if (need_percent) {
+		callchain_node__scnprintf_value(node, buf, sizeof(buf),
+						total);
+
+		if (asprintf(&alloc_str, "%s %s", buf, str) < 0)
+			str = "Not enough memory!";
+		else
+			str = alloc_str;
+	}
+
+	print(browser, chain, str, offset, row, arg);
+	free(alloc_str);
+	free(alloc_str2);
+
+	return ret;
+}
+
+static bool check_percent_display(struct rb_node *node, u64 parent_total)
+{
+	struct callchain_node *child;
+
+	if (node == NULL)
+		return false;
+
+	if (rb_next(node))
+		return true;
+
+	child = rb_entry(node, struct callchain_node, rb_node);
+	return callchain_cumul_hits(child) != parent_total;
+}
+
+static int hist_browser__show_callchain_flat(struct hist_browser *browser,
+					     struct rb_root *root,
+					     unsigned short row, u64 total,
+					     u64 parent_total,
+					     print_callchain_entry_fn print,
+					     struct callchain_print_arg *arg,
+					     check_output_full_fn is_output_full)
+{
+	struct rb_node *node;
+	int first_row = row, offset = LEVEL_OFFSET_STEP;
+	bool need_percent;
+
+	node = rb_first(root);
+	need_percent = check_percent_display(node, parent_total);
+
+	while (node) {
+		struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node);
+		struct rb_node *next = rb_next(node);
+		struct callchain_list *chain;
+		char folded_sign = ' ';
+		int first = true;
+		int extra_offset = 0;
+
+		list_for_each_entry(chain, &child->parent_val, list) {
+			bool was_first = first;
+
+			if (first)
+				first = false;
+			else if (need_percent)
+				extra_offset = LEVEL_OFFSET_STEP;
+
+			folded_sign = callchain_list__folded(chain);
+
+			row += hist_browser__show_callchain_list(browser, child,
+							chain, row, total,
+							was_first && need_percent,
+							offset + extra_offset,
+							print, arg);
+
+			if (is_output_full(browser, row))
+				goto out;
+
+			if (folded_sign == '+')
+				goto next;
+		}
+
+		list_for_each_entry(chain, &child->val, list) {
+			bool was_first = first;
+
+			if (first)
+				first = false;
+			else if (need_percent)
+				extra_offset = LEVEL_OFFSET_STEP;
+
+			folded_sign = callchain_list__folded(chain);
+
+			row += hist_browser__show_callchain_list(browser, child,
+							chain, row, total,
+							was_first && need_percent,
+							offset + extra_offset,
+							print, arg);
+
+			if (is_output_full(browser, row))
+				goto out;
+
+			if (folded_sign == '+')
+				break;
+		}
+
+next:
+		if (is_output_full(browser, row))
+			break;
+		node = next;
+	}
+out:
+	return row - first_row;
+}
+
+static char *hist_browser__folded_callchain_str(struct hist_browser *browser,
+						struct callchain_list *chain,
+						char *value_str, char *old_str)
+{
+	char bf[1024];
+	const char *str;
+	char *new;
+
+	str = callchain_list__sym_name(chain, bf, sizeof(bf),
+				       browser->show_dso);
+	if (old_str) {
+		if (asprintf(&new, "%s%s%s", old_str,
+			     symbol_conf.field_sep ?: ";", str) < 0)
+			new = NULL;
+	} else {
+		if (value_str) {
+			if (asprintf(&new, "%s %s", value_str, str) < 0)
+				new = NULL;
+		} else {
+			if (asprintf(&new, "%s", str) < 0)
+				new = NULL;
+		}
+	}
+	return new;
+}
+
+static int hist_browser__show_callchain_folded(struct hist_browser *browser,
+					       struct rb_root *root,
+					       unsigned short row, u64 total,
+					       u64 parent_total,
+					       print_callchain_entry_fn print,
+					       struct callchain_print_arg *arg,
+					       check_output_full_fn is_output_full)
+{
+	struct rb_node *node;
+	int first_row = row, offset = LEVEL_OFFSET_STEP;
+	bool need_percent;
+
+	node = rb_first(root);
+	need_percent = check_percent_display(node, parent_total);
+
+	while (node) {
+		struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node);
+		struct rb_node *next = rb_next(node);
+		struct callchain_list *chain, *first_chain = NULL;
+		int first = true;
+		char *value_str = NULL, *value_str_alloc = NULL;
+		char *chain_str = NULL, *chain_str_alloc = NULL;
+
+		if (arg->row_offset != 0) {
+			arg->row_offset--;
+			goto next;
+		}
+
+		if (need_percent) {
+			char buf[64];
+
+			callchain_node__scnprintf_value(child, buf, sizeof(buf), total);
+			if (asprintf(&value_str, "%s", buf) < 0) {
+				value_str = (char *)"<...>";
+				goto do_print;
+			}
+			value_str_alloc = value_str;
+		}
+
+		list_for_each_entry(chain, &child->parent_val, list) {
+			chain_str = hist_browser__folded_callchain_str(browser,
+						chain, value_str, chain_str);
+			if (first) {
+				first = false;
+				first_chain = chain;
+			}
+
+			if (chain_str == NULL) {
+				chain_str = (char *)"Not enough memory!";
+				goto do_print;
+			}
+
+			chain_str_alloc = chain_str;
+		}
+
+		list_for_each_entry(chain, &child->val, list) {
+			chain_str = hist_browser__folded_callchain_str(browser,
+						chain, value_str, chain_str);
+			if (first) {
+				first = false;
+				first_chain = chain;
+			}
+
+			if (chain_str == NULL) {
+				chain_str = (char *)"Not enough memory!";
+				goto do_print;
+			}
+
+			chain_str_alloc = chain_str;
+		}
+
+do_print:
+		print(browser, first_chain, chain_str, offset, row++, arg);
+		free(value_str_alloc);
+		free(chain_str_alloc);
+
+next:
+		if (is_output_full(browser, row))
+			break;
+		node = next;
+	}
+
+	return row - first_row;
+}
+
+static int hist_browser__show_callchain_graph(struct hist_browser *browser,
+					struct rb_root *root, int level,
+					unsigned short row, u64 total,
+					u64 parent_total,
+					print_callchain_entry_fn print,
+					struct callchain_print_arg *arg,
+					check_output_full_fn is_output_full)
+{
+	struct rb_node *node;
+	int first_row = row, offset = level * LEVEL_OFFSET_STEP;
+	bool need_percent;
+	u64 percent_total = total;
+
+	if (callchain_param.mode == CHAIN_GRAPH_REL)
+		percent_total = parent_total;
+
+	node = rb_first(root);
+	need_percent = check_percent_display(node, parent_total);
+
+	while (node) {
+		struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node);
+		struct rb_node *next = rb_next(node);
+		struct callchain_list *chain;
+		char folded_sign = ' ';
+		int first = true;
+		int extra_offset = 0;
+
+		list_for_each_entry(chain, &child->val, list) {
+			bool was_first = first;
+
+			if (first)
+				first = false;
+			else if (need_percent)
+				extra_offset = LEVEL_OFFSET_STEP;
+
+			folded_sign = callchain_list__folded(chain);
+
+			row += hist_browser__show_callchain_list(browser, child,
+							chain, row, percent_total,
+							was_first && need_percent,
+							offset + extra_offset,
+							print, arg);
+
+			if (is_output_full(browser, row))
+				goto out;
+
+			if (folded_sign == '+')
+				break;
+		}
+
+		if (folded_sign == '-') {
+			const int new_level = level + (extra_offset ? 2 : 1);
+
+			row += hist_browser__show_callchain_graph(browser, &child->rb_root,
+							    new_level, row, total,
+							    child->children_hit,
+							    print, arg, is_output_full);
+		}
+		if (is_output_full(browser, row))
+			break;
+		node = next;
+	}
+out:
+	return row - first_row;
+}
+
+static int hist_browser__show_callchain(struct hist_browser *browser,
+					struct hist_entry *entry, int level,
+					unsigned short row,
+					print_callchain_entry_fn print,
+					struct callchain_print_arg *arg,
+					check_output_full_fn is_output_full)
+{
+	u64 total = hists__total_period(entry->hists);
+	u64 parent_total;
+	int printed;
+
+	if (symbol_conf.cumulate_callchain)
+		parent_total = entry->stat_acc->period;
+	else
+		parent_total = entry->stat.period;
+
+	if (callchain_param.mode == CHAIN_FLAT) {
+		printed = hist_browser__show_callchain_flat(browser,
+						&entry->sorted_chain, row,
+						total, parent_total, print, arg,
+						is_output_full);
+	} else if (callchain_param.mode == CHAIN_FOLDED) {
+		printed = hist_browser__show_callchain_folded(browser,
+						&entry->sorted_chain, row,
+						total, parent_total, print, arg,
+						is_output_full);
+	} else {
+		printed = hist_browser__show_callchain_graph(browser,
+						&entry->sorted_chain, level, row,
+						total, parent_total, print, arg,
+						is_output_full);
+	}
+
+	if (arg->is_current_entry)
+		browser->he_selection = entry;
+
+	return printed;
+}
+
+struct hpp_arg {
+	struct ui_browser *b;
+	char folded_sign;
+	bool current_entry;
+};
+
+int __hpp__slsmg_color_printf(struct perf_hpp *hpp, const char *fmt, ...)
+{
+	struct hpp_arg *arg = hpp->ptr;
+	int ret, len;
+	va_list args;
+	double percent;
+
+	va_start(args, fmt);
+	len = va_arg(args, int);
+	percent = va_arg(args, double);
+	va_end(args);
+
+	ui_browser__set_percent_color(arg->b, percent, arg->current_entry);
+
+	ret = scnprintf(hpp->buf, hpp->size, fmt, len, percent);
+	ui_browser__printf(arg->b, "%s", hpp->buf);
+
+	return ret;
+}
+
+#define __HPP_COLOR_PERCENT_FN(_type, _field, _fmttype)			\
+static u64 __hpp_get_##_field(struct hist_entry *he)			\
+{									\
+	return he->stat._field;						\
+}									\
+									\
+static int								\
+hist_browser__hpp_color_##_type(struct perf_hpp_fmt *fmt,		\
+				struct perf_hpp *hpp,			\
+				struct hist_entry *he)			\
+{									\
+	return hpp__fmt(fmt, hpp, he, __hpp_get_##_field, " %*.2f%%",	\
+			__hpp__slsmg_color_printf, _fmttype);		\
+}
+
+#define __HPP_COLOR_ACC_PERCENT_FN(_type, _field, _fmttype)		\
+static u64 __hpp_get_acc_##_field(struct hist_entry *he)		\
+{									\
+	return he->stat_acc->_field;					\
+}									\
+									\
+static int								\
+hist_browser__hpp_color_##_type(struct perf_hpp_fmt *fmt,		\
+				struct perf_hpp *hpp,			\
+				struct hist_entry *he)			\
+{									\
+	if (!symbol_conf.cumulate_callchain) {				\
+		struct hpp_arg *arg = hpp->ptr;				\
+		int len = fmt->user_len ?: fmt->len;			\
+		int ret = scnprintf(hpp->buf, hpp->size,		\
+				    "%*s", len, "N/A");			\
+		ui_browser__printf(arg->b, "%s", hpp->buf);		\
+									\
+		return ret;						\
+	}								\
+	return hpp__fmt(fmt, hpp, he, __hpp_get_acc_##_field,		\
+			" %*.2f%%", __hpp__slsmg_color_printf,		\
+			_fmttype);					\
+}
+
+#define __HPP_COLOR_MEM_STAT_FN(_name, _type)				\
+static int								\
+hist_browser__hpp_color_mem_stat_##_name(struct perf_hpp_fmt *fmt,	\
+					 struct perf_hpp *hpp,		\
+					 struct hist_entry *he)		\
+{									\
+	return hpp__fmt_mem_stat(fmt, hpp, he, PERF_MEM_STAT_##_type,	\
+				 " %5.1f%%", __hpp__slsmg_color_printf);\
+}
+
+__HPP_COLOR_PERCENT_FN(overhead, period, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_PERCENT_FN(latency, latency, PERF_HPP_FMT_TYPE__LATENCY)
+__HPP_COLOR_PERCENT_FN(overhead_sys, period_sys, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_PERCENT_FN(overhead_us, period_us, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_PERCENT_FN(overhead_guest_sys, period_guest_sys, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_ACC_PERCENT_FN(overhead_acc, period, PERF_HPP_FMT_TYPE__PERCENT)
+__HPP_COLOR_ACC_PERCENT_FN(latency_acc, latency, PERF_HPP_FMT_TYPE__LATENCY)
+__HPP_COLOR_MEM_STAT_FN(op, OP)
+__HPP_COLOR_MEM_STAT_FN(cache, CACHE)
+__HPP_COLOR_MEM_STAT_FN(memory, MEMORY)
+__HPP_COLOR_MEM_STAT_FN(snoop, SNOOP)
+__HPP_COLOR_MEM_STAT_FN(dtlb, DTLB)
+
+#undef __HPP_COLOR_PERCENT_FN
+#undef __HPP_COLOR_ACC_PERCENT_FN
+#undef __HPP_COLOR_MEM_STAT_FN
+
+void hist_browser__init_hpp(void)
+{
+	perf_hpp__format[PERF_HPP__OVERHEAD].color =
+				hist_browser__hpp_color_overhead;
+	perf_hpp__format[PERF_HPP__LATENCY].color =
+				hist_browser__hpp_color_latency;
+	perf_hpp__format[PERF_HPP__OVERHEAD_SYS].color =
+				hist_browser__hpp_color_overhead_sys;
+	perf_hpp__format[PERF_HPP__OVERHEAD_US].color =
+				hist_browser__hpp_color_overhead_us;
+	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].color =
+				hist_browser__hpp_color_overhead_guest_sys;
+	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].color =
+				hist_browser__hpp_color_overhead_guest_us;
+	perf_hpp__format[PERF_HPP__OVERHEAD_ACC].color =
+				hist_browser__hpp_color_overhead_acc;
+	perf_hpp__format[PERF_HPP__LATENCY_ACC].color =
+				hist_browser__hpp_color_latency_acc;
+	perf_hpp__format[PERF_HPP__MEM_STAT_OP].color =
+				hist_browser__hpp_color_mem_stat_op;
+	perf_hpp__format[PERF_HPP__MEM_STAT_CACHE].color =
+				hist_browser__hpp_color_mem_stat_cache;
+	perf_hpp__format[PERF_HPP__MEM_STAT_MEMORY].color =
+				hist_browser__hpp_color_mem_stat_memory;
+	perf_hpp__format[PERF_HPP__MEM_STAT_SNOOP].color =
+				hist_browser__hpp_color_mem_stat_snoop;
+	perf_hpp__format[PERF_HPP__MEM_STAT_DTLB].color =
+				hist_browser__hpp_color_mem_stat_dtlb;
+
+	res_sample_init();
+}
+
+static int hist_browser__show_entry(struct hist_browser *browser,
+				    struct hist_entry *entry,
+				    unsigned short row)
+{
+	int printed = 0;
+	int width = browser->b.width;
+	char folded_sign = ' ';
+	bool current_entry = ui_browser__is_current_entry(&browser->b, row);
+	bool use_callchain = hist_entry__has_callchains(entry) && symbol_conf.use_callchain;
+	off_t row_offset = entry->row_offset;
+	bool first = true;
+	struct perf_hpp_fmt *fmt;
+
+	if (current_entry) {
+		browser->he_selection = entry;
+		browser->selection = &entry->ms;
+	}
+
+	if (use_callchain) {
+		hist_entry__init_have_children(entry);
+		folded_sign = hist_entry__folded(entry);
+	}
+
+	if (row_offset == 0) {
+		struct hpp_arg arg = {
+			.b		= &browser->b,
+			.folded_sign	= folded_sign,
+			.current_entry	= current_entry,
+		};
+		int column = 0;
+
+		ui_browser__gotorc(&browser->b, row, 0);
+
+		hists__for_each_format(browser->hists, fmt) {
+			char s[2048];
+			struct perf_hpp hpp = {
+				.buf	= s,
+				.size	= sizeof(s),
+				.ptr	= &arg,
+			};
+
+			if (perf_hpp__should_skip(fmt, entry->hists) ||
+			    column++ < browser->b.horiz_scroll)
+				continue;
+
+			if (current_entry && browser->b.navkeypressed) {
+				ui_browser__set_color(&browser->b,
+						      HE_COLORSET_SELECTED);
+			} else {
+				ui_browser__set_color(&browser->b,
+						      HE_COLORSET_NORMAL);
+			}
+
+			if (first) {
+				if (use_callchain) {
+					ui_browser__printf(&browser->b, "%c ", folded_sign);
+					width -= 2;
+				}
+				first = false;
+			} else {
+				ui_browser__printf(&browser->b, "  ");
+				width -= 2;
+			}
+
+			if (fmt->color) {
+				int ret = fmt->color(fmt, &hpp, entry);
+				hist_entry__snprintf_alignment(entry, &hpp, fmt, ret);
+				/*
+				 * fmt->color() already used ui_browser to
+				 * print the non alignment bits, skip it (+ret):
+				 */
+				ui_browser__printf(&browser->b, "%s", s + ret);
+			} else {
+				hist_entry__snprintf_alignment(entry, &hpp, fmt, fmt->entry(fmt, &hpp, entry));
+				ui_browser__printf(&browser->b, "%s", s);
+			}
+			width -= hpp.buf - s;
+		}
+
+		/* The scroll bar isn't being used */
+		if (!browser->b.navkeypressed)
+			width += 1;
+
+		ui_browser__write_nstring(&browser->b, "", width);
+
+		++row;
+		++printed;
+	} else
+		--row_offset;
+
+	if (folded_sign == '-' && row != browser->b.rows) {
+		struct callchain_print_arg arg = {
+			.row_offset = row_offset,
+			.is_current_entry = current_entry,
+		};
+
+		printed += hist_browser__show_callchain(browser,
+				entry, 1, row,
+				hist_browser__show_callchain_entry,
+				&arg,
+				hist_browser__check_output_full);
+	}
+
+	return printed;
+}
+
+static int hist_browser__show_hierarchy_entry(struct hist_browser *browser,
+					      struct hist_entry *entry,
+					      unsigned short row,
+					      int level)
+{
+	int printed = 0;
+	int width = browser->b.width;
+	char folded_sign = ' ';
+	bool current_entry = ui_browser__is_current_entry(&browser->b, row);
+	off_t row_offset = entry->row_offset;
+	bool first = true;
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	struct hpp_arg arg = {
+		.b		= &browser->b,
+		.current_entry	= current_entry,
+	};
+	int column = 0;
+	int hierarchy_indent = (entry->hists->nr_hpp_node - 2) * HIERARCHY_INDENT;
+
+	if (current_entry) {
+		browser->he_selection = entry;
+		browser->selection = &entry->ms;
+	}
+
+	hist_entry__init_have_children(entry);
+	folded_sign = hist_entry__folded(entry);
+	arg.folded_sign = folded_sign;
+
+	if (entry->leaf && row_offset) {
+		row_offset--;
+		goto show_callchain;
+	}
+
+	ui_browser__gotorc(&browser->b, row, 0);
+
+	if (current_entry && browser->b.navkeypressed)
+		ui_browser__set_color(&browser->b, HE_COLORSET_SELECTED);
+	else
+		ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
+
+	ui_browser__write_nstring(&browser->b, "", level * HIERARCHY_INDENT);
+	width -= level * HIERARCHY_INDENT;
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&entry->hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		char s[2048];
+		struct perf_hpp hpp = {
+			.buf		= s,
+			.size		= sizeof(s),
+			.ptr		= &arg,
+		};
+
+		if (perf_hpp__should_skip(fmt, entry->hists) ||
+		    column++ < browser->b.horiz_scroll)
+			continue;
+
+		if (current_entry && browser->b.navkeypressed) {
+			ui_browser__set_color(&browser->b,
+					      HE_COLORSET_SELECTED);
+		} else {
+			ui_browser__set_color(&browser->b,
+					      HE_COLORSET_NORMAL);
+		}
+
+		if (first) {
+			ui_browser__printf(&browser->b, "%c ", folded_sign);
+			width -= 2;
+			first = false;
+		} else {
+			ui_browser__printf(&browser->b, "  ");
+			width -= 2;
+		}
+
+		if (fmt->color) {
+			int ret = fmt->color(fmt, &hpp, entry);
+			hist_entry__snprintf_alignment(entry, &hpp, fmt, ret);
+			/*
+			 * fmt->color() already used ui_browser to
+			 * print the non alignment bits, skip it (+ret):
+			 */
+			ui_browser__printf(&browser->b, "%s", s + ret);
+		} else {
+			int ret = fmt->entry(fmt, &hpp, entry);
+			hist_entry__snprintf_alignment(entry, &hpp, fmt, ret);
+			ui_browser__printf(&browser->b, "%s", s);
+		}
+		width -= hpp.buf - s;
+	}
+
+	if (!first) {
+		ui_browser__write_nstring(&browser->b, "", hierarchy_indent);
+		width -= hierarchy_indent;
+	}
+
+	if (column >= browser->b.horiz_scroll) {
+		char s[2048];
+		struct perf_hpp hpp = {
+			.buf		= s,
+			.size		= sizeof(s),
+			.ptr		= &arg,
+		};
+
+		if (current_entry && browser->b.navkeypressed) {
+			ui_browser__set_color(&browser->b,
+					      HE_COLORSET_SELECTED);
+		} else {
+			ui_browser__set_color(&browser->b,
+					      HE_COLORSET_NORMAL);
+		}
+
+		perf_hpp_list__for_each_format(entry->hpp_list, fmt) {
+			if (first) {
+				ui_browser__printf(&browser->b, "%c ", folded_sign);
+				first = false;
+			} else {
+				ui_browser__write_nstring(&browser->b, "", 2);
+			}
+
+			width -= 2;
+
+			/*
+			 * No need to call hist_entry__snprintf_alignment()
+			 * since this fmt is always the last column in the
+			 * hierarchy mode.
+			 */
+			if (fmt->color) {
+				width -= fmt->color(fmt, &hpp, entry);
+			} else {
+				int i = 0;
+
+				width -= fmt->entry(fmt, &hpp, entry);
+				ui_browser__printf(&browser->b, "%s", skip_spaces(s));
+
+				while (isspace(s[i++]))
+					width++;
+			}
+		}
+	}
+
+	/* The scroll bar isn't being used */
+	if (!browser->b.navkeypressed)
+		width += 1;
+
+	ui_browser__write_nstring(&browser->b, "", width);
+
+	++row;
+	++printed;
+
+show_callchain:
+	if (entry->leaf && folded_sign == '-' && row != browser->b.rows) {
+		struct callchain_print_arg carg = {
+			.row_offset = row_offset,
+		};
+
+		printed += hist_browser__show_callchain(browser, entry,
+					level + 1, row,
+					hist_browser__show_callchain_entry, &carg,
+					hist_browser__check_output_full);
+	}
+
+	return printed;
+}
+
+static int hist_browser__show_no_entry(struct hist_browser *browser,
+				       unsigned short row, int level)
+{
+	int width = browser->b.width;
+	bool current_entry = ui_browser__is_current_entry(&browser->b, row);
+	bool first = true;
+	int column = 0;
+	int ret;
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	int indent = browser->hists->nr_hpp_node - 2;
+
+	if (current_entry) {
+		browser->he_selection = NULL;
+		browser->selection = NULL;
+	}
+
+	ui_browser__gotorc(&browser->b, row, 0);
+
+	if (current_entry && browser->b.navkeypressed)
+		ui_browser__set_color(&browser->b, HE_COLORSET_SELECTED);
+	else
+		ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
+
+	ui_browser__write_nstring(&browser->b, "", level * HIERARCHY_INDENT);
+	width -= level * HIERARCHY_INDENT;
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&browser->hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		if (perf_hpp__should_skip(fmt, browser->hists) ||
+		    column++ < browser->b.horiz_scroll)
+			continue;
+
+		ret = fmt->width(fmt, NULL, browser->hists);
+
+		if (first) {
+			/* for folded sign */
+			first = false;
+			ret++;
+		} else {
+			/* space between columns */
+			ret += 2;
+		}
+
+		ui_browser__write_nstring(&browser->b, "", ret);
+		width -= ret;
+	}
+
+	ui_browser__write_nstring(&browser->b, "", indent * HIERARCHY_INDENT);
+	width -= indent * HIERARCHY_INDENT;
+
+	if (column >= browser->b.horiz_scroll) {
+		char buf[32];
+
+		ret = snprintf(buf, sizeof(buf), "no entry >= %.2f%%", browser->min_pcnt);
+		ui_browser__printf(&browser->b, "  %s", buf);
+		width -= ret + 2;
+	}
+
+	/* The scroll bar isn't being used */
+	if (!browser->b.navkeypressed)
+		width += 1;
+
+	ui_browser__write_nstring(&browser->b, "", width);
+	return 1;
+}
+
+static int advance_hpp_check(struct perf_hpp *hpp, int inc)
+{
+	advance_hpp(hpp, inc);
+	return hpp->size <= 0;
+}
+
+static int
+hists_browser__scnprintf_headers(struct hist_browser *browser, char *buf,
+				 size_t size, int line)
+{
+	struct hists *hists = browser->hists;
+	struct perf_hpp dummy_hpp = {
+		.buf    = buf,
+		.size   = size,
+	};
+	struct perf_hpp_fmt *fmt;
+	size_t ret = 0;
+	int column = 0;
+	int span = 0;
+
+	if (hists__has_callchains(hists) && symbol_conf.use_callchain) {
+		ret = scnprintf(buf, size, "  ");
+		if (advance_hpp_check(&dummy_hpp, ret))
+			return ret;
+	}
+
+	hists__for_each_format(browser->hists, fmt) {
+		if (perf_hpp__should_skip(fmt, hists)  || column++ < browser->b.horiz_scroll)
+			continue;
+
+		ret = fmt->header(fmt, &dummy_hpp, hists, line, &span);
+		if (advance_hpp_check(&dummy_hpp, ret))
+			break;
+
+		if (span)
+			continue;
+
+		ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "  ");
+		if (advance_hpp_check(&dummy_hpp, ret))
+			break;
+	}
+
+	return ret;
+}
+
+static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *browser,
+						      char *buf, size_t size, int line)
+{
+	struct hists *hists = browser->hists;
+	struct perf_hpp dummy_hpp = {
+		.buf    = buf,
+		.size   = size,
+	};
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	size_t ret = 0;
+	int column = 0;
+	int indent = hists->nr_hpp_node - 2;
+	bool first_node, first_col;
+
+	ret = scnprintf(buf, size, "  ");
+	if (advance_hpp_check(&dummy_hpp, ret))
+		return ret;
+
+	first_node = true;
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		if (column++ < browser->b.horiz_scroll)
+			continue;
+
+		ret = fmt->header(fmt, &dummy_hpp, hists, line, NULL);
+		if (advance_hpp_check(&dummy_hpp, ret))
+			break;
+
+		ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "  ");
+		if (advance_hpp_check(&dummy_hpp, ret))
+			break;
+
+		first_node = false;
+	}
+
+	if (line < hists->hpp_list->nr_header_lines - 1)
+		return ret;
+
+	if (!first_node) {
+		ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "%*s",
+				indent * HIERARCHY_INDENT, "");
+		if (advance_hpp_check(&dummy_hpp, ret))
+			return ret;
+	}
+
+	first_node = true;
+	list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
+		if (!first_node) {
+			ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, " / ");
+			if (advance_hpp_check(&dummy_hpp, ret))
+				break;
+		}
+		first_node = false;
+
+		first_col = true;
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+			char *start;
+
+			if (perf_hpp__should_skip(fmt, hists))
+				continue;
+
+			if (!first_col) {
+				ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "+");
+				if (advance_hpp_check(&dummy_hpp, ret))
+					break;
+			}
+			first_col = false;
+
+			ret = fmt->header(fmt, &dummy_hpp, hists, line, NULL);
+			dummy_hpp.buf[ret] = '\0';
+
+			start = strim(dummy_hpp.buf);
+			ret = strlen(start);
+
+			if (start != dummy_hpp.buf)
+				memmove(dummy_hpp.buf, start, ret + 1);
+
+			if (advance_hpp_check(&dummy_hpp, ret))
+				break;
+		}
+	}
+
+	return ret;
+}
+
+static void hists_browser__hierarchy_headers(struct hist_browser *browser)
+{
+	struct perf_hpp_list *hpp_list = browser->hists->hpp_list;
+	char headers[1024];
+	int line;
+
+	for (line = 0; line < hpp_list->nr_header_lines; line++) {
+		hists_browser__scnprintf_hierarchy_headers(browser, headers,
+							   sizeof(headers), line);
+
+		ui_browser__gotorc_title(&browser->b, line, 0);
+		ui_browser__set_color(&browser->b, HE_COLORSET_ROOT);
+		ui_browser__write_nstring(&browser->b, headers, browser->b.width + 1);
+	}
+}
+
+static void hists_browser__headers(struct hist_browser *browser)
+{
+	struct hists *hists = browser->hists;
+	struct perf_hpp_list *hpp_list = hists->hpp_list;
+
+	int line;
+
+	for (line = 0; line < hpp_list->nr_header_lines; line++) {
+		char headers[1024];
+
+		hists_browser__scnprintf_headers(browser, headers,
+						 sizeof(headers), line);
+
+		ui_browser__gotorc_title(&browser->b, line, 0);
+		ui_browser__set_color(&browser->b, HE_COLORSET_ROOT);
+		ui_browser__write_nstring(&browser->b, headers, browser->b.width + 1);
+	}
+}
+
+static void hist_browser__show_headers(struct hist_browser *browser)
+{
+	if (symbol_conf.report_hierarchy)
+		hists_browser__hierarchy_headers(browser);
+	else
+		hists_browser__headers(browser);
+}
+
+static void ui_browser__hists_init_top(struct ui_browser *browser)
+{
+	if (browser->top == NULL) {
+		struct hist_browser *hb;
+
+		hb = container_of(browser, struct hist_browser, b);
+		browser->top = rb_first_cached(&hb->hists->entries);
+	}
+}
+
+static unsigned int hist_browser__refresh(struct ui_browser *browser)
+{
+	unsigned row = 0;
+	struct rb_node *nd;
+	struct hist_browser *hb = container_of(browser, struct hist_browser, b);
+
+	if (hb->show_headers)
+		hist_browser__show_headers(hb);
+
+	ui_browser__hists_init_top(browser);
+	hb->he_selection = NULL;
+	hb->selection = NULL;
+
+	for (nd = browser->top; nd; nd = rb_hierarchy_next(nd)) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+		float percent;
+
+		if (h->filtered) {
+			/* let it move to sibling */
+			h->unfolded = false;
+			continue;
+		}
+
+		if (symbol_conf.report_individual_block)
+			percent = block_info__total_cycles_percent(h);
+		else
+			percent = hist_entry__get_percent_limit(h);
+
+		if (percent < hb->min_pcnt)
+			continue;
+
+		if (symbol_conf.report_hierarchy) {
+			row += hist_browser__show_hierarchy_entry(hb, h, row,
+								  h->depth);
+			if (row == browser->rows)
+				break;
+
+			if (h->has_no_entry) {
+				hist_browser__show_no_entry(hb, row, h->depth + 1);
+				row++;
+			}
+		} else {
+			row += hist_browser__show_entry(hb, h, row);
+		}
+
+		if (row == browser->rows)
+			break;
+	}
+
+	return row;
+}
+
+static struct rb_node *hists__filter_entries(struct rb_node *nd,
+					     float min_pcnt)
+{
+	while (nd != NULL) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+		float percent = hist_entry__get_percent_limit(h);
+
+		if (!h->filtered && percent >= min_pcnt)
+			return nd;
+
+		/*
+		 * If it's filtered, its all children also were filtered.
+		 * So move to sibling node.
+		 */
+		if (rb_next(nd))
+			nd = rb_next(nd);
+		else
+			nd = rb_hierarchy_next(nd);
+	}
+
+	return NULL;
+}
+
+static struct rb_node *hists__filter_prev_entries(struct rb_node *nd,
+						  float min_pcnt)
+{
+	while (nd != NULL) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+		float percent = hist_entry__get_percent_limit(h);
+
+		if (!h->filtered && percent >= min_pcnt)
+			return nd;
+
+		nd = rb_hierarchy_prev(nd);
+	}
+
+	return NULL;
+}
+
+static void ui_browser__hists_seek(struct ui_browser *browser,
+				   off_t offset, int whence)
+{
+	struct hist_entry *h;
+	struct rb_node *nd;
+	bool first = true;
+	struct hist_browser *hb;
+
+	hb = container_of(browser, struct hist_browser, b);
+
+	if (browser->nr_entries == 0)
+		return;
+
+	ui_browser__hists_init_top(browser);
+
+	switch (whence) {
+	case SEEK_SET:
+		nd = hists__filter_entries(rb_first(browser->entries),
+					   hb->min_pcnt);
+		break;
+	case SEEK_CUR:
+		nd = browser->top;
+		goto do_offset;
+	case SEEK_END:
+		nd = rb_hierarchy_last(rb_last(browser->entries));
+		nd = hists__filter_prev_entries(nd, hb->min_pcnt);
+		first = false;
+		break;
+	default:
+		return;
+	}
+
+	/*
+	 * Moves not relative to the first visible entry invalidates its
+	 * row_offset:
+	 */
+	h = rb_entry(browser->top, struct hist_entry, rb_node);
+	h->row_offset = 0;
+
+	/*
+	 * Here we have to check if nd is expanded (+), if it is we can't go
+	 * the next top level hist_entry, instead we must compute an offset of
+	 * what _not_ to show and not change the first visible entry.
+	 *
+	 * This offset increments when we are going from top to bottom and
+	 * decreases when we're going from bottom to top.
+	 *
+	 * As we don't have backpointers to the top level in the callchains
+	 * structure, we need to always print the whole hist_entry callchain,
+	 * skipping the first ones that are before the first visible entry
+	 * and stop when we printed enough lines to fill the screen.
+	 */
+do_offset:
+	if (!nd)
+		return;
+
+	if (offset > 0) {
+		do {
+			h = rb_entry(nd, struct hist_entry, rb_node);
+			if (h->unfolded && h->leaf) {
+				u16 remaining = h->nr_rows - h->row_offset;
+				if (offset > remaining) {
+					offset -= remaining;
+					h->row_offset = 0;
+				} else {
+					h->row_offset += offset;
+					offset = 0;
+					browser->top = nd;
+					break;
+				}
+			}
+			nd = hists__filter_entries(rb_hierarchy_next(nd),
+						   hb->min_pcnt);
+			if (nd == NULL)
+				break;
+			--offset;
+			browser->top = nd;
+		} while (offset != 0);
+	} else if (offset < 0) {
+		while (1) {
+			h = rb_entry(nd, struct hist_entry, rb_node);
+			if (h->unfolded && h->leaf) {
+				if (first) {
+					if (-offset > h->row_offset) {
+						offset += h->row_offset;
+						h->row_offset = 0;
+					} else {
+						h->row_offset += offset;
+						offset = 0;
+						browser->top = nd;
+						break;
+					}
+				} else {
+					if (-offset > h->nr_rows) {
+						offset += h->nr_rows;
+						h->row_offset = 0;
+					} else {
+						h->row_offset = h->nr_rows + offset;
+						offset = 0;
+						browser->top = nd;
+						break;
+					}
+				}
+			}
+
+			nd = hists__filter_prev_entries(rb_hierarchy_prev(nd),
+							hb->min_pcnt);
+			if (nd == NULL)
+				break;
+			++offset;
+			browser->top = nd;
+			if (offset == 0) {
+				/*
+				 * Last unfiltered hist_entry, check if it is
+				 * unfolded, if it is then we should have
+				 * row_offset at its last entry.
+				 */
+				h = rb_entry(nd, struct hist_entry, rb_node);
+				if (h->unfolded && h->leaf)
+					h->row_offset = h->nr_rows;
+				break;
+			}
+			first = false;
+		}
+	} else {
+		browser->top = nd;
+		h = rb_entry(nd, struct hist_entry, rb_node);
+		h->row_offset = 0;
+	}
+}
+
+static int hist_browser__fprintf_callchain(struct hist_browser *browser,
+					   struct hist_entry *he, FILE *fp,
+					   int level)
+{
+	struct callchain_print_arg arg  = {
+		.fp = fp,
+	};
+
+	hist_browser__show_callchain(browser, he, level, 0,
+				     hist_browser__fprintf_callchain_entry, &arg,
+				     hist_browser__check_dump_full);
+	return arg.printed;
+}
+
+static int hist_browser__fprintf_entry(struct hist_browser *browser,
+				       struct hist_entry *he, FILE *fp)
+{
+	char s[8192];
+	int printed = 0;
+	char folded_sign = ' ';
+	struct perf_hpp hpp = {
+		.buf = s,
+		.size = sizeof(s),
+	};
+	struct perf_hpp_fmt *fmt;
+	bool first = true;
+	int ret;
+
+	if (hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
+		folded_sign = hist_entry__folded(he);
+		printed += fprintf(fp, "%c ", folded_sign);
+	}
+
+	hists__for_each_format(browser->hists, fmt) {
+		if (perf_hpp__should_skip(fmt, he->hists))
+			continue;
+
+		if (!first) {
+			ret = scnprintf(hpp.buf, hpp.size, "  ");
+			advance_hpp(&hpp, ret);
+		} else
+			first = false;
+
+		ret = fmt->entry(fmt, &hpp, he);
+		ret = hist_entry__snprintf_alignment(he, &hpp, fmt, ret);
+		advance_hpp(&hpp, ret);
+	}
+	printed += fprintf(fp, "%s\n", s);
+
+	if (folded_sign == '-')
+		printed += hist_browser__fprintf_callchain(browser, he, fp, 1);
+
+	return printed;
+}
+
+
+static int hist_browser__fprintf_hierarchy_entry(struct hist_browser *browser,
+						 struct hist_entry *he,
+						 FILE *fp, int level)
+{
+	char s[8192];
+	int printed = 0;
+	char folded_sign = ' ';
+	struct perf_hpp hpp = {
+		.buf = s,
+		.size = sizeof(s),
+	};
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	bool first = true;
+	int ret;
+	int hierarchy_indent = (he->hists->nr_hpp_node - 2) * HIERARCHY_INDENT;
+
+	printed = fprintf(fp, "%*s", level * HIERARCHY_INDENT, "");
+
+	folded_sign = hist_entry__folded(he);
+	printed += fprintf(fp, "%c", folded_sign);
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&he->hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		if (!first) {
+			ret = scnprintf(hpp.buf, hpp.size, "  ");
+			advance_hpp(&hpp, ret);
+		} else
+			first = false;
+
+		ret = fmt->entry(fmt, &hpp, he);
+		advance_hpp(&hpp, ret);
+	}
+
+	ret = scnprintf(hpp.buf, hpp.size, "%*s", hierarchy_indent, "");
+	advance_hpp(&hpp, ret);
+
+	perf_hpp_list__for_each_format(he->hpp_list, fmt) {
+		ret = scnprintf(hpp.buf, hpp.size, "  ");
+		advance_hpp(&hpp, ret);
+
+		ret = fmt->entry(fmt, &hpp, he);
+		advance_hpp(&hpp, ret);
+	}
+
+	strim(s);
+	printed += fprintf(fp, "%s\n", s);
+
+	if (he->leaf && folded_sign == '-') {
+		printed += hist_browser__fprintf_callchain(browser, he, fp,
+							   he->depth + 1);
+	}
+
+	return printed;
+}
+
+static int hist_browser__fprintf(struct hist_browser *browser, FILE *fp)
+{
+	struct rb_node *nd = hists__filter_entries(rb_first(browser->b.entries),
+						   browser->min_pcnt);
+	int printed = 0;
+
+	while (nd) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+
+		if (symbol_conf.report_hierarchy) {
+			printed += hist_browser__fprintf_hierarchy_entry(browser,
+									 h, fp,
+									 h->depth);
+		} else {
+			printed += hist_browser__fprintf_entry(browser, h, fp);
+		}
+
+		nd = hists__filter_entries(rb_hierarchy_next(nd),
+					   browser->min_pcnt);
+	}
+
+	return printed;
+}
+
+static int hist_browser__dump(struct hist_browser *browser)
+{
+	char filename[64];
+	FILE *fp;
+
+	while (1) {
+		scnprintf(filename, sizeof(filename), "perf.hist.%d", browser->print_seq);
+		if (access(filename, F_OK))
+			break;
+		/*
+ 		 * XXX: Just an arbitrary lazy upper limit
+ 		 */
+		if (++browser->print_seq == 8192) {
+			ui_helpline__fpush("Too many perf.hist.N files, nothing written!");
+			return -1;
+		}
+	}
+
+	fp = fopen(filename, "w");
+	if (fp == NULL) {
+		char bf[64];
+		const char *err = str_error_r(errno, bf, sizeof(bf));
+		ui_helpline__fpush("Couldn't write to %s: %s", filename, err);
+		return -1;
+	}
+
+	++browser->print_seq;
+	hist_browser__fprintf(browser, fp);
+	fclose(fp);
+	ui_helpline__fpush("%s written!", filename);
+
+	return 0;
+}
+
+void hist_browser__init(struct hist_browser *browser,
+			struct hists *hists)
+{
+	struct perf_hpp_fmt *fmt;
+
+	browser->hists			= hists;
+	browser->b.refresh		= hist_browser__refresh;
+	browser->b.refresh_dimensions	= hist_browser__refresh_dimensions;
+	browser->b.seek			= ui_browser__hists_seek;
+	browser->b.use_navkeypressed	= true;
+	browser->show_headers		= symbol_conf.show_hist_headers;
+	hist_browser__set_title_space(browser);
+
+	if (symbol_conf.report_hierarchy) {
+		struct perf_hpp_list_node *fmt_node;
+
+		/* count overhead columns (in the first node) */
+		fmt_node = list_first_entry(&hists->hpp_formats,
+					    struct perf_hpp_list_node, list);
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt)
+			++browser->b.columns;
+
+		/* add a single column for whole hierarchy sort keys*/
+		++browser->b.columns;
+	} else {
+		hists__for_each_format(hists, fmt)
+			++browser->b.columns;
+	}
+
+	hists__reset_column_width(hists);
+}
+
+struct hist_browser *hist_browser__new(struct hists *hists)
+{
+	struct hist_browser *browser = zalloc(sizeof(*browser));
+
+	if (browser)
+		hist_browser__init(browser, hists);
+
+	return browser;
+}
+
+static struct hist_browser *
+perf_evsel_browser__new(struct evsel *evsel,
+			struct hist_browser_timer *hbt,
+			struct perf_env *env)
+{
+	struct hist_browser *browser = hist_browser__new(evsel__hists(evsel));
+
+	if (browser) {
+		browser->hbt   = hbt;
+		browser->env   = env;
+		browser->title = hists_browser__scnprintf_title;
+	}
+	return browser;
+}
+
+void hist_browser__delete(struct hist_browser *browser)
+{
+	free(browser);
+}
+
+static struct hist_entry *hist_browser__selected_entry(struct hist_browser *browser)
+{
+	return browser->he_selection;
+}
+
+static struct thread *hist_browser__selected_thread(struct hist_browser *browser)
+{
+	return browser->he_selection->thread;
+}
+
+static struct res_sample *hist_browser__selected_res_sample(struct hist_browser *browser)
+{
+	return browser->he_selection ? browser->he_selection->res_samples : NULL;
+}
+
+/* Check whether the browser is for 'top' or 'report' */
+static inline bool is_report_browser(void *timer)
+{
+	return timer == NULL;
+}
+
+static int hists_browser__scnprintf_title(struct hist_browser *browser, char *bf, size_t size)
+{
+	struct hist_browser_timer *hbt = browser->hbt;
+	int printed = __hists__scnprintf_title(browser->hists, bf, size, !is_report_browser(hbt));
+
+	if (!is_report_browser(hbt)) {
+		struct perf_top *top = hbt->arg;
+
+		printed += scnprintf(bf + printed, size - printed,
+				     " lost: %" PRIu64 "/%" PRIu64,
+				     top->lost, top->lost_total);
+
+		printed += scnprintf(bf + printed, size - printed,
+				     " drop: %" PRIu64 "/%" PRIu64,
+				     top->drop, top->drop_total);
+
+		if (top->zero)
+			printed += scnprintf(bf + printed, size - printed, " [z]");
+
+		perf_top__reset_sample_counters(top);
+	}
+
+
+	return printed;
+}
+
+struct popup_action {
+	unsigned long		time;
+	int (*fn)(struct hist_browser *browser, struct popup_action *act);
+	struct map_symbol	ms;
+	int			socket;
+	enum rstype		rstype;
+
+};
+
+static inline void free_popup_options(char **options, int n)
+{
+	int i;
+
+	for (i = 0; i < n; ++i)
+		zfree(&options[i]);
+}
+
+static inline void free_popup_actions(struct popup_action *actions, int n)
+{
+	int i;
+
+	for (i = 0; i < n; ++i) {
+		map_symbol__exit(&actions[i].ms);
+		memset(&actions[i], 0, sizeof(struct popup_action));
+	}
+}
+
+/*
+ * Only runtime switching of perf data file will make "input_name" point
+ * to a malloced buffer. So add "is_input_name_malloced" flag to decide
+ * whether we need to call free() for current "input_name" during the switch.
+ */
+static bool is_input_name_malloced = false;
+
+static int switch_data_file(void)
+{
+	char *pwd, *options[32], *abs_path[32], *tmp;
+	DIR *pwd_dir;
+	int nr_options = 0, choice = -1, ret = -1;
+	struct dirent *dent;
+
+	pwd = getenv("PWD");
+	if (!pwd)
+		return ret;
+
+	pwd_dir = opendir(pwd);
+	if (!pwd_dir)
+		return ret;
+
+	memset(options, 0, sizeof(options));
+	memset(abs_path, 0, sizeof(abs_path));
+
+	while ((dent = readdir(pwd_dir))) {
+		char path[PATH_MAX];
+		u64 magic;
+		char *name = dent->d_name;
+		FILE *file;
+
+		if (!(dent->d_type == DT_REG))
+			continue;
+
+		snprintf(path, sizeof(path), "%s/%s", pwd, name);
+
+		file = fopen(path, "r");
+		if (!file)
+			continue;
+
+		if (fread(&magic, 1, 8, file) < 8)
+			goto close_file_and_continue;
+
+		if (is_perf_magic(magic)) {
+			options[nr_options] = strdup(name);
+			if (!options[nr_options])
+				goto close_file_and_continue;
+
+			abs_path[nr_options] = strdup(path);
+			if (!abs_path[nr_options]) {
+				zfree(&options[nr_options]);
+				ui__warning("Can't search all data files due to memory shortage.\n");
+				fclose(file);
+				break;
+			}
+
+			nr_options++;
+		}
+
+close_file_and_continue:
+		fclose(file);
+		if (nr_options >= 32) {
+			ui__warning("Too many perf data files in PWD!\n"
+				    "Only the first 32 files will be listed.\n");
+			break;
+		}
+	}
+	closedir(pwd_dir);
+
+	if (nr_options) {
+		choice = ui__popup_menu(nr_options, options, NULL);
+		if (choice < nr_options && choice >= 0) {
+			tmp = strdup(abs_path[choice]);
+			if (tmp) {
+				if (is_input_name_malloced)
+					free((void *)input_name);
+				input_name = tmp;
+				is_input_name_malloced = true;
+				ret = 0;
+			} else
+				ui__warning("Data switch failed due to memory shortage!\n");
+		}
+	}
+
+	free_popup_options(options, nr_options);
+	free_popup_options(abs_path, nr_options);
+	return ret;
+}
+
+static int
+do_annotate(struct hist_browser *browser, struct popup_action *act)
+{
+	struct evsel *evsel;
+	struct annotation *notes;
+	struct hist_entry *he;
+	int err;
+
+	if (!annotate_opts.objdump_path &&
+	    perf_env__lookup_objdump(browser->env, &annotate_opts.objdump_path))
+		return 0;
+
+	notes = symbol__annotation(act->ms.sym);
+	if (!notes->src)
+		return 0;
+
+	if (browser->block_evsel)
+		evsel = browser->block_evsel;
+	else
+		evsel = hists_to_evsel(browser->hists);
+
+	he = hist_browser__selected_entry(browser);
+	err = __hist_entry__tui_annotate(he, &act->ms, evsel, browser->hbt, NO_ADDR);
+	/*
+	 * offer option to annotate the other branch source or target
+	 * (if they exists) when returning from annotate
+	 */
+	if ((err == 'q' || err == CTRL('c')) && he->branch_info)
+		return 1;
+
+	ui_browser__update_nr_entries(&browser->b, browser->hists->nr_entries);
+	if (err)
+		ui_browser__handle_resize(&browser->b);
+	return 0;
+}
+
+static struct symbol *symbol__new_unresolved(u64 addr, struct map *map)
+{
+	struct annotated_source *src;
+	struct symbol *sym;
+	char name[64];
+
+	snprintf(name, sizeof(name), "%.*" PRIx64, BITS_PER_LONG / 4, addr);
+
+	sym = symbol__new(addr, ANNOTATION_DUMMY_LEN, 0, 0, name);
+	if (sym) {
+		src = symbol__hists(sym, 1);
+		if (!src) {
+			symbol__delete(sym);
+			return NULL;
+		}
+
+		dso__insert_symbol(map__dso(map), sym);
+	}
+
+	return sym;
+}
+
+static int
+add_annotate_opt(struct popup_action *act, char **optstr,
+		 struct map_symbol *ms,
+		 u64 addr)
+{
+	struct dso *dso;
+
+	if (!ms->map || (dso = map__dso(ms->map)) == NULL || dso__annotate_warned(dso))
+		return 0;
+
+	if (!ms->sym)
+		ms->sym = symbol__new_unresolved(addr, ms->map);
+
+	if (ms->sym == NULL || symbol__annotation(ms->sym)->src == NULL)
+		return 0;
+
+	if (asprintf(optstr, "Annotate %s", ms->sym->name) < 0)
+		return 0;
+
+	map_symbol__copy(&act->ms, ms);
+	act->fn = do_annotate;
+	return 1;
+}
+
+static int
+do_annotate_type(struct hist_browser *browser, struct popup_action *act __maybe_unused)
+{
+	struct hist_entry *he = browser->he_selection;
+
+	hist_entry__annotate_data_tui(he, hists_to_evsel(browser->hists), browser->hbt);
+	ui_browser__handle_resize(&browser->b);
+	return 0;
+}
+
+static int
+add_annotate_type_opt(struct popup_action *act, char **optstr,
+		      struct hist_entry *he)
+{
+	if (he == NULL || he->mem_type == NULL || he->mem_type->histograms == NULL)
+		return 0;
+
+	if (asprintf(optstr, "Annotate type %s", he->mem_type->self.type_name) < 0)
+		return 0;
+
+	act->fn = do_annotate_type;
+	return 1;
+}
+
+static int
+do_zoom_thread(struct hist_browser *browser, struct popup_action *act)
+{
+	struct thread *thread = act->ms.thread;
+
+	if ((!hists__has(browser->hists, thread) &&
+	     !hists__has(browser->hists, comm)) || thread == NULL)
+		return 0;
+
+	if (browser->hists->thread_filter) {
+		pstack__remove(browser->pstack, &browser->hists->thread_filter);
+		perf_hpp__set_elide(HISTC_THREAD, false);
+		thread__zput(browser->hists->thread_filter);
+		ui_helpline__pop();
+	} else {
+		const char *comm_set_str =
+			thread__comm_set(thread) ? thread__comm_str(thread) : "";
+
+		if (hists__has(browser->hists, thread)) {
+			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s(%d) thread\"",
+					   comm_set_str, thread__tid(thread));
+		} else {
+			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s thread\"",
+					   comm_set_str);
+		}
+
+		browser->hists->thread_filter = thread__get(thread);
+		perf_hpp__set_elide(HISTC_THREAD, false);
+		pstack__push(browser->pstack, &browser->hists->thread_filter);
+	}
+
+	hists__filter_by_thread(browser->hists);
+	hist_browser__reset(browser);
+	return 0;
+}
+
+static int
+add_thread_opt(struct hist_browser *browser, struct popup_action *act,
+	       char **optstr, struct thread *thread)
+{
+	int ret;
+	const char *comm_set_str, *in_out;
+
+	if ((!hists__has(browser->hists, thread) &&
+	     !hists__has(browser->hists, comm)) || thread == NULL)
+		return 0;
+
+	in_out = browser->hists->thread_filter ? "out of" : "into";
+	comm_set_str = thread__comm_set(thread) ? thread__comm_str(thread) : "";
+	if (hists__has(browser->hists, thread)) {
+		ret = asprintf(optstr, "Zoom %s %s(%d) thread",
+			       in_out, comm_set_str, thread__tid(thread));
+	} else {
+		ret = asprintf(optstr, "Zoom %s %s thread", in_out, comm_set_str);
+	}
+	if (ret < 0)
+		return 0;
+
+	act->ms.thread = thread__get(thread);
+	act->fn = do_zoom_thread;
+	return 1;
+}
+
+static int hists_browser__zoom_map(struct hist_browser *browser, struct map *map)
+{
+	if (!hists__has(browser->hists, dso) || map == NULL)
+		return 0;
+
+	if (browser->hists->dso_filter) {
+		pstack__remove(browser->pstack, &browser->hists->dso_filter);
+		perf_hpp__set_elide(HISTC_DSO, false);
+		dso__put((struct dso *)browser->hists->dso_filter);
+		browser->hists->dso_filter = NULL;
+		ui_helpline__pop();
+	} else {
+		struct dso *dso = map__dso(map);
+		ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s DSO\"",
+				   __map__is_kernel(map) ? "the Kernel" : dso__short_name(dso));
+		browser->hists->dso_filter = dso__get(dso);
+		perf_hpp__set_elide(HISTC_DSO, true);
+		pstack__push(browser->pstack, &browser->hists->dso_filter);
+	}
+
+	hists__filter_by_dso(browser->hists);
+	hist_browser__reset(browser);
+	return 0;
+}
+
+static int
+do_zoom_dso(struct hist_browser *browser, struct popup_action *act)
+{
+	return hists_browser__zoom_map(browser, act->ms.map);
+}
+
+static int
+add_dso_opt(struct hist_browser *browser, struct popup_action *act,
+	    char **optstr, struct map *map)
+{
+	if (!hists__has(browser->hists, dso) || map == NULL)
+		return 0;
+
+	if (asprintf(optstr, "Zoom %s %s DSO (use the 'k' hotkey to zoom directly into the kernel)",
+		     browser->hists->dso_filter ? "out of" : "into",
+		     __map__is_kernel(map) ? "the Kernel" : dso__short_name(map__dso(map))) < 0)
+		return 0;
+
+	act->ms.map = map__get(map);
+	act->fn = do_zoom_dso;
+	return 1;
+}
+
+static int do_toggle_callchain(struct hist_browser *browser, struct popup_action *act __maybe_unused)
+{
+	hist_browser__toggle_fold(browser);
+	return 0;
+}
+
+static int add_callchain_toggle_opt(struct hist_browser *browser, struct popup_action *act, char **optstr)
+{
+	char sym_name[512];
+
+        if (!hist_browser__selection_has_children(browser))
+                return 0;
+
+	if (asprintf(optstr, "%s [%s] callchain (one level, same as '+' hotkey, use 'e'/'c' for the whole main level entry)",
+		     hist_browser__selection_unfolded(browser) ? "Collapse" : "Expand",
+		     hist_browser__selection_sym_name(browser, sym_name, sizeof(sym_name))) < 0)
+		return 0;
+
+	act->fn = do_toggle_callchain;
+	return 1;
+}
+
+static int
+do_browse_map(struct hist_browser *browser __maybe_unused,
+	      struct popup_action *act)
+{
+	map__browse(act->ms.map);
+	return 0;
+}
+
+static int
+add_map_opt(struct hist_browser *browser,
+	    struct popup_action *act, char **optstr, struct map *map)
+{
+	if (!hists__has(browser->hists, dso) || map == NULL)
+		return 0;
+
+	if (asprintf(optstr, "Browse map details") < 0)
+		return 0;
+
+	act->ms.map = map__get(map);
+	act->fn = do_browse_map;
+	return 1;
+}
+
+static int
+do_run_script(struct hist_browser *browser,
+	      struct popup_action *act)
+{
+	char *script_opt;
+	int len;
+	int n = 0;
+
+	len = 100;
+	if (act->ms.thread)
+		len += strlen(thread__comm_str(act->ms.thread));
+	else if (act->ms.sym)
+		len += strlen(act->ms.sym->name);
+	script_opt = malloc(len);
+	if (!script_opt)
+		return -1;
+
+	script_opt[0] = 0;
+	if (act->ms.thread) {
+		n = scnprintf(script_opt, len, " -c %s ",
+			  thread__comm_str(act->ms.thread));
+	} else if (act->ms.sym) {
+		n = scnprintf(script_opt, len, " -S %s ",
+			  act->ms.sym->name);
+	}
+
+	if (act->time) {
+		char start[32], end[32];
+		unsigned long starttime = act->time;
+		unsigned long endtime = act->time + symbol_conf.time_quantum;
+
+		if (starttime == endtime) { /* Display 1ms as fallback */
+			starttime -= 1*NSEC_PER_MSEC;
+			endtime += 1*NSEC_PER_MSEC;
+		}
+		timestamp__scnprintf_usec(starttime, start, sizeof start);
+		timestamp__scnprintf_usec(endtime, end, sizeof end);
+		n += snprintf(script_opt + n, len - n, " --time %s,%s", start, end);
+	}
+
+	script_browse(script_opt, hists_to_evsel(browser->hists));
+	free(script_opt);
+	return 0;
+}
+
+static int
+do_res_sample_script(struct hist_browser *browser,
+		     struct popup_action *act)
+{
+	struct hist_entry *he;
+
+	he = hist_browser__selected_entry(browser);
+	res_sample_browse(he->res_samples, he->num_res, hists_to_evsel(browser->hists), act->rstype);
+	return 0;
+}
+
+static int
+add_script_opt_2(struct popup_action *act, char **optstr,
+	       struct thread *thread, struct symbol *sym,
+	       const char *tstr)
+{
+
+	if (thread) {
+		if (asprintf(optstr, "Run scripts for samples of thread [%s]%s",
+			     thread__comm_str(thread), tstr) < 0)
+			return 0;
+	} else if (sym) {
+		if (asprintf(optstr, "Run scripts for samples of symbol [%s]%s",
+			     sym->name, tstr) < 0)
+			return 0;
+	} else {
+		if (asprintf(optstr, "Run scripts for all samples%s", tstr) < 0)
+			return 0;
+	}
+
+	act->ms.thread = thread__get(thread);
+	act->ms.sym = sym;
+	act->fn = do_run_script;
+	return 1;
+}
+
+static int
+add_script_opt(struct hist_browser *browser,
+	       struct popup_action *act, char **optstr,
+	       struct thread *thread, struct symbol *sym)
+{
+	int n, j, ret;
+	struct hist_entry *he;
+
+	n = add_script_opt_2(act, optstr, thread, sym, "");
+
+	he = hist_browser__selected_entry(browser);
+	if (sort_order && strstr(sort_order, "time")) {
+		char tstr[128];
+		struct popup_action *time_act = act;
+		char **time_optstr = optstr;
+
+		if (n > 0) {
+			time_optstr++;
+			time_act++;
+		}
+		if (he == NULL)
+			return n;
+		j = sprintf(tstr, " in ");
+		j += timestamp__scnprintf_usec(he->time, tstr + j,
+					       sizeof tstr - j);
+		j += sprintf(tstr + j, "-");
+		timestamp__scnprintf_usec(he->time + symbol_conf.time_quantum,
+				          tstr + j, sizeof tstr - j);
+		ret = add_script_opt_2(time_act, time_optstr, thread, sym, tstr);
+		if (ret > 0) {
+			time_act->time = he->time;
+			n += ret;
+		}
+	}
+	return n;
+}
+
+static int
+add_res_sample_opt(struct hist_browser *browser __maybe_unused,
+		   struct popup_action *act, char **optstr,
+		   struct res_sample *res_sample,
+		   enum rstype type)
+{
+	if (!res_sample)
+		return 0;
+
+	if (asprintf(optstr, "Show context for individual samples %s",
+		type == A_ASM ? "with assembler" :
+		type == A_SOURCE ? "with source" : "") < 0)
+		return 0;
+
+	act->fn = do_res_sample_script;
+	act->rstype = type;
+	return 1;
+}
+
+static int
+do_switch_data(struct hist_browser *browser __maybe_unused,
+	       struct popup_action *act __maybe_unused)
+{
+	if (switch_data_file()) {
+		ui__warning("Won't switch the data files due to\n"
+			    "no valid data file get selected!\n");
+		return 0;
+	}
+
+	return K_SWITCH_INPUT_DATA;
+}
+
+static int
+add_switch_opt(struct hist_browser *browser,
+	       struct popup_action *act, char **optstr)
+{
+	if (!is_report_browser(browser->hbt))
+		return 0;
+
+	if (asprintf(optstr, "Switch to another data file in PWD") < 0)
+		return 0;
+
+	act->fn = do_switch_data;
+	return 1;
+}
+
+static int
+do_exit_browser(struct hist_browser *browser __maybe_unused,
+		struct popup_action *act __maybe_unused)
+{
+	return 0;
+}
+
+static int
+add_exit_opt(struct hist_browser *browser __maybe_unused,
+	     struct popup_action *act, char **optstr)
+{
+	if (asprintf(optstr, "Exit") < 0)
+		return 0;
+
+	act->fn = do_exit_browser;
+	return 1;
+}
+
+static int
+do_zoom_socket(struct hist_browser *browser, struct popup_action *act)
+{
+	if (!hists__has(browser->hists, socket) || act->socket < 0)
+		return 0;
+
+	if (browser->hists->socket_filter > -1) {
+		pstack__remove(browser->pstack, &browser->hists->socket_filter);
+		browser->hists->socket_filter = -1;
+		perf_hpp__set_elide(HISTC_SOCKET, false);
+	} else {
+		browser->hists->socket_filter = act->socket;
+		perf_hpp__set_elide(HISTC_SOCKET, true);
+		pstack__push(browser->pstack, &browser->hists->socket_filter);
+	}
+
+	hists__filter_by_socket(browser->hists);
+	hist_browser__reset(browser);
+	return 0;
+}
+
+static int
+add_socket_opt(struct hist_browser *browser, struct popup_action *act,
+	       char **optstr, int socket_id)
+{
+	if (!hists__has(browser->hists, socket) || socket_id < 0)
+		return 0;
+
+	if (asprintf(optstr, "Zoom %s Processor Socket %d",
+		     (browser->hists->socket_filter > -1) ? "out of" : "into",
+		     socket_id) < 0)
+		return 0;
+
+	act->socket = socket_id;
+	act->fn = do_zoom_socket;
+	return 1;
+}
+
+static void hist_browser__update_nr_entries(struct hist_browser *hb)
+{
+	u64 nr_entries = 0;
+	struct rb_node *nd = rb_first_cached(&hb->hists->entries);
+
+	if (hb->min_pcnt == 0 && !symbol_conf.report_hierarchy) {
+		hb->nr_non_filtered_entries = hb->hists->nr_non_filtered_entries;
+		return;
+	}
+
+	while ((nd = hists__filter_entries(nd, hb->min_pcnt)) != NULL) {
+		nr_entries++;
+		nd = rb_hierarchy_next(nd);
+	}
+
+	hb->nr_non_filtered_entries = nr_entries;
+	hb->nr_hierarchy_entries = nr_entries;
+}
+
+static void hist_browser__update_percent_limit(struct hist_browser *hb,
+					       double percent)
+{
+	struct hist_entry *he;
+	struct rb_node *nd = rb_first_cached(&hb->hists->entries);
+	u64 total = hists__total_period(hb->hists);
+	u64 min_callchain_hits = total * (percent / 100);
+
+	hb->min_pcnt = callchain_param.min_percent = percent;
+
+	while ((nd = hists__filter_entries(nd, hb->min_pcnt)) != NULL) {
+		he = rb_entry(nd, struct hist_entry, rb_node);
+
+		if (he->has_no_entry) {
+			he->has_no_entry = false;
+			he->nr_rows = 0;
+		}
+
+		if (!he->leaf || !hist_entry__has_callchains(he) || !symbol_conf.use_callchain)
+			goto next;
+
+		if (callchain_param.mode == CHAIN_GRAPH_REL) {
+			total = he->stat.period;
+
+			if (symbol_conf.cumulate_callchain)
+				total = he->stat_acc->period;
+
+			min_callchain_hits = total * (percent / 100);
+		}
+
+		callchain_param.sort(&he->sorted_chain, he->callchain,
+				     min_callchain_hits, &callchain_param);
+
+next:
+		nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD);
+
+		/* force to re-evaluate folding state of callchains */
+		he->init_have_children = false;
+		hist_entry__set_folding(he, hb, false);
+	}
+}
+
+static int evsel__hists_browse(struct evsel *evsel, int nr_events, const char *helpline,
+			       bool left_exits, struct hist_browser_timer *hbt, float min_pcnt,
+			       struct perf_env *env, bool warn_lost_event)
+{
+	struct hists *hists = evsel__hists(evsel);
+	struct hist_browser *browser = perf_evsel_browser__new(evsel, hbt, env);
+	struct branch_info *bi = NULL;
+#define MAX_OPTIONS  32
+	char *options[MAX_OPTIONS];
+	struct popup_action actions[MAX_OPTIONS], hotkey_act;
+	int nr_options = 0;
+	int key = -1;
+	char buf[128];
+	int delay_secs = hbt ? hbt->refresh : 0;
+
+#define HIST_BROWSER_HELP_COMMON					\
+	"h/?/F1        Show this window\n"				\
+	"UP/DOWN/PGUP\n"						\
+	"PGDN/SPACE    Navigate\n"					\
+	"q/ESC/CTRL+C  Exit browser or go back to previous screen\n\n"	\
+	"For multiple event sessions:\n\n"				\
+	"TAB/UNTAB     Switch events\n\n"				\
+	"For symbolic views (--sort has sym):\n\n"			\
+	"ENTER         Zoom into DSO/Threads & Annotate current symbol\n" \
+	"ESC           Zoom out\n"					\
+	"+             Expand/Collapse one callchain level\n"		\
+	"a             Annotate current symbol\n"			\
+	"C             Collapse all callchains\n"			\
+	"d             Zoom into current DSO\n"				\
+	"e             Expand/Collapse main entry callchains\n"	\
+	"E             Expand all callchains\n"				\
+	"F             Toggle percentage of filtered entries\n"		\
+	"H             Display column headers\n"			\
+	"k             Zoom into the kernel map\n"			\
+	"L             Change percent limit\n"				\
+	"m             Display context menu\n"				\
+	"S             Zoom into current Processor Socket\n"		\
+
+	/* help messages are sorted by lexical order of the hotkey */
+	static const char report_help[] = HIST_BROWSER_HELP_COMMON
+	"i             Show header information\n"
+	"P             Print histograms to perf.hist.N\n"
+	"r             Run available scripts\n"
+	"s             Switch to another data file in PWD\n"
+	"t             Zoom into current Thread\n"
+	"V             Verbose (DSO names in callchains, etc)\n"
+	"/             Filter symbol by name\n"
+	"0-9           Sort by event n in group";
+	static const char top_help[] = HIST_BROWSER_HELP_COMMON
+	"P             Print histograms to perf.hist.N\n"
+	"t             Zoom into current Thread\n"
+	"V             Verbose (DSO names in callchains, etc)\n"
+	"z             Toggle zeroing of samples\n"
+	"f             Enable/Disable events\n"
+	"/             Filter symbol by name";
+
+	if (browser == NULL)
+		return -1;
+
+	/* reset abort key so that it can get Ctrl-C as a key */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+	SLtty_set_suspend_state(true);
+
+	if (min_pcnt)
+		browser->min_pcnt = min_pcnt;
+	hist_browser__update_nr_entries(browser);
+
+	memset(options, 0, sizeof(options));
+	memset(actions, 0, sizeof(actions));
+
+	browser->pstack = pstack__new(3);
+	if (browser->pstack == NULL)
+		goto out;
+
+	ui_helpline__push(helpline);
+
+	if (symbol_conf.col_width_list_str)
+		perf_hpp__set_user_width(symbol_conf.col_width_list_str);
+
+	if (!is_report_browser(hbt))
+		browser->b.no_samples_msg = "Collecting samples...";
+
+	while (1) {
+		struct thread *thread = NULL;
+		struct map *map = NULL;
+		int choice;
+		int socked_id = -1;
+
+		key = 0; // reset key
+do_hotkey:		 // key came straight from options ui__popup_menu()
+		free_popup_options(options, MAX_OPTIONS);
+		free_popup_actions(actions, MAX_OPTIONS);
+		choice = nr_options = 0;
+		key = hist_browser__run(browser, helpline, warn_lost_event, key);
+
+		if (browser->he_selection != NULL) {
+			thread = hist_browser__selected_thread(browser);
+			map = browser->selection->map;
+			socked_id = browser->he_selection->socket;
+		}
+		switch (key) {
+		case K_TAB:
+		case K_UNTAB:
+			if (nr_events == 1)
+				continue;
+			/*
+			 * Exit the browser, let hists__browser_tree
+			 * go to the next or previous
+			 */
+			goto out_free_stack;
+		case '0' ... '9':
+			if (!symbol_conf.event_group ||
+			    evsel->core.nr_members < 2) {
+				snprintf(buf, sizeof(buf),
+					 "Sort by index only available with group events!");
+				helpline = buf;
+				continue;
+			}
+
+			if (key - '0' == symbol_conf.group_sort_idx)
+				continue;
+
+			symbol_conf.group_sort_idx = key - '0';
+
+			if (symbol_conf.group_sort_idx >= evsel->core.nr_members) {
+				snprintf(buf, sizeof(buf),
+					 "Max event group index to sort is %d (index from 0 to %d)",
+					 evsel->core.nr_members - 1,
+					 evsel->core.nr_members - 1);
+				helpline = buf;
+				continue;
+			}
+
+			key = K_RELOAD;
+			goto out_free_stack;
+		case 'a':
+			if (!hists__has(hists, sym)) {
+				ui_browser__warning(&browser->b, delay_secs * 2,
+			"Annotation is only available for symbolic views, "
+			"include \"sym*\" in --sort to use it.");
+				continue;
+			}
+
+			if (!browser->selection ||
+			    !browser->selection->map ||
+			    !map__dso(browser->selection->map) ||
+			    dso__annotate_warned(map__dso(browser->selection->map))) {
+				continue;
+			}
+
+			if (!browser->selection->sym) {
+				struct map_symbol source_ms;
+
+				if (!browser->he_selection)
+					continue;
+
+				memset(&source_ms, 0, sizeof(source_ms));
+
+				if (sort__mode == SORT_MODE__BRANCH) {
+					bi = browser->he_selection->branch_info;
+					if (!bi || !bi->to.ms.map)
+						continue;
+
+					source_ms.sym =
+						symbol__new_unresolved(
+							bi->to.al_addr,
+							bi->to.ms.map);
+					source_ms.thread = bi->to.ms.thread;
+					source_ms.map = bi->to.ms.map;
+				} else {
+					source_ms.sym =
+						symbol__new_unresolved(
+							browser->he_selection->ip,
+							browser->selection->map);
+					source_ms.thread = browser->selection->thread;
+					source_ms.map = browser->selection->map;
+				}
+
+				if (!source_ms.sym)
+					continue;
+
+				memset(&hotkey_act, 0, sizeof(hotkey_act));
+				map_symbol__copy(&hotkey_act.ms, &source_ms);
+				do_annotate(browser, &hotkey_act);
+				map_symbol__exit(&hotkey_act.ms);
+			} else {
+				if (symbol__annotation(browser->selection->sym)->src == NULL) {
+					ui_browser__warning(&browser->b, delay_secs * 2,
+						"No samples for the \"%s\" symbol.\n\n"
+						"Probably appeared just in a callchain",
+						browser->selection->sym->name);
+					continue;
+				}
+
+				memset(&hotkey_act, 0, sizeof(hotkey_act));
+				map_symbol__copy(&hotkey_act.ms, browser->selection);
+				do_annotate(browser, &hotkey_act);
+				map_symbol__exit(&hotkey_act.ms);
+			}
+			continue;
+		case 'P':
+			hist_browser__dump(browser);
+			continue;
+		case 'd':
+			memset(&hotkey_act, 0, sizeof(hotkey_act));
+			hotkey_act.ms.map = map__get(map);
+			do_zoom_dso(browser, &hotkey_act);
+			map_symbol__exit(&hotkey_act.ms);
+			continue;
+		case 'k':
+			if (browser->selection != NULL)
+				hists_browser__zoom_map(browser,
+					maps__machine(thread__maps(browser->selection->thread)
+						     )->vmlinux_map);
+			continue;
+		case 'V':
+			verbose = (verbose + 1) % 4;
+			browser->show_dso = verbose > 0;
+			ui_helpline__fpush("Verbosity level set to %d\n",
+					   verbose);
+			continue;
+		case 't':
+			memset(&hotkey_act, 0, sizeof(hotkey_act));
+			hotkey_act.ms.thread = thread__get(thread);
+			do_zoom_thread(browser, &hotkey_act);
+			map_symbol__exit(&hotkey_act.ms);
+			continue;
+		case 'S':
+			memset(&hotkey_act, 0, sizeof(hotkey_act));
+			hotkey_act.socket = socked_id;
+			do_zoom_socket(browser, &hotkey_act);
+			map_symbol__exit(&hotkey_act.ms);
+			continue;
+		case '/':
+			if (ui_browser__input_window("Symbol to show",
+					"Please enter the name of symbol you want to see.\n"
+					"To remove the filter later, press / + ENTER.",
+					buf, "ENTER: OK, ESC: Cancel",
+					delay_secs * 2) == K_ENTER) {
+				char *new_filter = *buf ? strdup(buf) : NULL;
+
+				zfree(&hists->symbol_filter_str);
+				hists->symbol_filter_str = new_filter;
+				hists__filter_by_symbol(hists);
+				hist_browser__reset(browser);
+			}
+			continue;
+		case 'r':
+			if (is_report_browser(hbt)) {
+				memset(&hotkey_act, 0, sizeof(hotkey_act));
+				hotkey_act.ms.thread = NULL;
+				hotkey_act.ms.sym = NULL;
+				do_run_script(browser, &hotkey_act);
+				map_symbol__exit(&hotkey_act.ms);
+			}
+			continue;
+		case 's':
+			if (is_report_browser(hbt)) {
+				key = do_switch_data(browser, actions);
+				if (key == K_SWITCH_INPUT_DATA)
+					goto out_free_stack;
+			}
+			continue;
+		case 'i':
+			/* env->arch is NULL for live-mode (i.e. perf top) */
+			if (env->arch)
+				tui__header_window(evsel__session(evsel));
+			continue;
+		case 'F':
+			symbol_conf.filter_relative ^= 1;
+			continue;
+		case 'z':
+			if (!is_report_browser(hbt)) {
+				struct perf_top *top = hbt->arg;
+
+				top->zero = !top->zero;
+			}
+			continue;
+		case 'L':
+			if (ui_browser__input_window("Percent Limit",
+					"Please enter the value you want to hide entries under that percent.",
+					buf, "ENTER: OK, ESC: Cancel",
+					delay_secs * 2) == K_ENTER) {
+				char *end;
+				double new_percent = strtod(buf, &end);
+
+				if (new_percent < 0 || new_percent > 100) {
+					ui_browser__warning(&browser->b, delay_secs * 2,
+						"Invalid percent: %.2f", new_percent);
+					continue;
+				}
+
+				hist_browser__update_percent_limit(browser, new_percent);
+				hist_browser__reset(browser);
+			}
+			continue;
+		case K_F1:
+		case 'h':
+		case '?':
+			ui_browser__help_window(&browser->b,
+				is_report_browser(hbt) ? report_help : top_help);
+			continue;
+		case K_ENTER:
+		case K_RIGHT:
+		case 'm':
+			/* menu */
+			break;
+		case K_ESC:
+		case K_LEFT: {
+			const void *top;
+
+			if (pstack__empty(browser->pstack)) {
+				/*
+				 * Go back to the perf_evsel_menu__run or other user
+				 */
+				if (left_exits)
+					goto out_free_stack;
+
+				if (key == K_ESC &&
+				    ui_browser__dialog_yesno(&browser->b,
+							     "Do you really want to exit?"))
+					goto out_free_stack;
+
+				continue;
+			}
+			memset(&hotkey_act, 0, sizeof(hotkey_act));
+			top = pstack__peek(browser->pstack);
+			if (top == &browser->hists->dso_filter) {
+				hotkey_act.ms.map = map__get(map);
+				do_zoom_dso(browser, &hotkey_act);
+			} else if (top == &browser->hists->thread_filter) {
+				hotkey_act.ms.thread = thread__get(thread);
+				do_zoom_thread(browser, &hotkey_act);
+			} else if (top == &browser->hists->socket_filter) {
+				hotkey_act.socket = socked_id;
+				do_zoom_socket(browser, &hotkey_act);
+			}
+			map_symbol__exit(&hotkey_act.ms);
+			continue;
+		}
+		case 'q':
+		case CTRL('c'):
+			goto out_free_stack;
+		case 'f':
+			if (!is_report_browser(hbt)) {
+				struct perf_top *top = hbt->arg;
+
+				evlist__toggle_enable(top->evlist);
+				/*
+				 * No need to refresh, resort/decay histogram
+				 * entries if we are not collecting samples:
+				 */
+				if (evlist__enabled(top->evlist)) {
+					helpline = "Press 'f' to disable the events or 'h' to see other hotkeys";
+					hbt->refresh = delay_secs;
+				} else {
+					helpline = "Press 'f' again to re-enable the events";
+					hbt->refresh = 0;
+				}
+				continue;
+			}
+			/* Fall thru */
+		default:
+			helpline = "Press '?' for help on key bindings";
+			ui_browser__warn_unhandled_hotkey(&browser->b, key, delay_secs,
+							  ", use 'h'/'?'/F1 to see actions");
+			continue;
+		}
+
+		if (!hists__has(hists, sym) || browser->selection == NULL)
+			goto skip_annotation;
+
+		if (sort__mode == SORT_MODE__BRANCH) {
+
+			if (browser->he_selection)
+				bi = browser->he_selection->branch_info;
+
+			if (bi == NULL)
+				goto skip_annotation;
+
+			nr_options += add_annotate_opt(&actions[nr_options],
+						       &options[nr_options],
+						       &bi->from.ms,
+						       bi->from.al_addr);
+			if (bi->to.ms.sym != bi->from.ms.sym)
+				nr_options += add_annotate_opt(&actions[nr_options],
+							&options[nr_options],
+							&bi->to.ms,
+							bi->to.al_addr);
+		} else if (browser->he_selection) {
+			nr_options += add_annotate_opt(&actions[nr_options],
+						       &options[nr_options],
+						       browser->selection,
+						       browser->he_selection->ip);
+		}
+skip_annotation:
+		nr_options += add_annotate_type_opt(&actions[nr_options],
+						    &options[nr_options],
+						    browser->he_selection);
+		nr_options += add_thread_opt(browser, &actions[nr_options],
+					     &options[nr_options], thread);
+		nr_options += add_dso_opt(browser, &actions[nr_options],
+					  &options[nr_options], map);
+		nr_options += add_callchain_toggle_opt(browser, &actions[nr_options], &options[nr_options]);
+		nr_options += add_map_opt(browser, &actions[nr_options],
+					  &options[nr_options],
+					  browser->selection ?
+						browser->selection->map : NULL);
+		nr_options += add_socket_opt(browser, &actions[nr_options],
+					     &options[nr_options],
+					     socked_id);
+		/* perf script support */
+		if (!is_report_browser(hbt))
+			goto skip_scripting;
+
+		if (browser->he_selection) {
+			if (hists__has(hists, thread) && thread) {
+				nr_options += add_script_opt(browser,
+							     &actions[nr_options],
+							     &options[nr_options],
+							     thread, NULL);
+			}
+			/*
+			 * Note that browser->selection != NULL
+			 * when browser->he_selection is not NULL,
+			 * so we don't need to check browser->selection
+			 * before fetching browser->selection->sym like what
+			 * we do before fetching browser->selection->map.
+			 *
+			 * See hist_browser__show_entry.
+			 */
+			if (hists__has(hists, sym) && browser->selection->sym) {
+				nr_options += add_script_opt(browser,
+							     &actions[nr_options],
+							     &options[nr_options],
+							     NULL, browser->selection->sym);
+			}
+		}
+		nr_options += add_script_opt(browser, &actions[nr_options],
+					     &options[nr_options], NULL, NULL);
+		nr_options += add_res_sample_opt(browser, &actions[nr_options],
+						 &options[nr_options],
+						 hist_browser__selected_res_sample(browser),
+						 A_NORMAL);
+		nr_options += add_res_sample_opt(browser, &actions[nr_options],
+						 &options[nr_options],
+						 hist_browser__selected_res_sample(browser),
+						 A_ASM);
+		nr_options += add_res_sample_opt(browser, &actions[nr_options],
+						 &options[nr_options],
+						 hist_browser__selected_res_sample(browser),
+						 A_SOURCE);
+		nr_options += add_switch_opt(browser, &actions[nr_options],
+					     &options[nr_options]);
+skip_scripting:
+		nr_options += add_exit_opt(browser, &actions[nr_options],
+					   &options[nr_options]);
+
+		do {
+			struct popup_action *act;
+
+			choice = ui__popup_menu(nr_options, options, &key);
+			if (choice == -1)
+				break;
+
+			if (choice == nr_options)
+				goto do_hotkey;
+
+			act = &actions[choice];
+			key = act->fn(browser, act);
+		} while (key == 1);
+
+		if (key == K_SWITCH_INPUT_DATA)
+			break;
+
+		free_popup_options(options, MAX_OPTIONS);
+		free_popup_actions(actions, MAX_OPTIONS);
+	}
+out_free_stack:
+	pstack__delete(browser->pstack);
+	free_popup_actions(actions, MAX_OPTIONS);
+	thread__zput(hists->thread_filter);
+	dso__put((struct dso *)hists->dso_filter);
+	hists->dso_filter = NULL;
+	perf_hpp__set_elide(HISTC_DSO, false);
+	perf_hpp__set_elide(HISTC_THREAD, false);
+	hists__filter_by_dso(hists);
+	hists__filter_by_thread(hists);
+out:
+	hist_browser__delete(browser);
+	free_popup_options(options, MAX_OPTIONS);
+	return key;
+}
+
+struct evsel_menu {
+	struct ui_browser b;
+	struct evsel *selection;
+	bool lost_events, lost_events_warned;
+	float min_pcnt;
+	struct perf_env *env;
+};
+
+static void perf_evsel_menu__write(struct ui_browser *browser,
+				   void *entry, int row)
+{
+	struct evsel_menu *menu = container_of(browser,
+						    struct evsel_menu, b);
+	struct evsel *evsel = list_entry(entry, struct evsel, core.node);
+	struct hists *hists = evsel__hists(evsel);
+	bool current_entry = ui_browser__is_current_entry(browser, row);
+	unsigned long nr_events = hists->stats.nr_samples;
+	const char *ev_name = evsel__name(evsel);
+	char bf[256], unit;
+	const char *warn = " ";
+	size_t printed;
+
+	ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
+						       HE_COLORSET_NORMAL);
+
+	if (evsel__is_group_event(evsel)) {
+		struct evsel *pos;
+
+		ev_name = evsel__group_name(evsel);
+
+		for_each_group_member(pos, evsel) {
+			struct hists *pos_hists = evsel__hists(pos);
+			nr_events += pos_hists->stats.nr_samples;
+		}
+	}
+
+	nr_events = convert_unit(nr_events, &unit);
+	printed = scnprintf(bf, sizeof(bf), "%lu%c%s%s", nr_events,
+			   unit, unit == ' ' ? "" : " ", ev_name);
+	ui_browser__printf(browser, "%s", bf);
+
+	nr_events = evlist__stats(evsel->evlist)->nr_events[PERF_RECORD_LOST];
+	if (nr_events != 0) {
+		menu->lost_events = true;
+		if (!current_entry)
+			ui_browser__set_color(browser, HE_COLORSET_TOP);
+		nr_events = convert_unit(nr_events, &unit);
+		printed += scnprintf(bf, sizeof(bf), ": %ld%c%schunks LOST!",
+				     nr_events, unit, unit == ' ' ? "" : " ");
+		warn = bf;
+	}
+
+	ui_browser__write_nstring(browser, warn, browser->width - printed);
+
+	if (current_entry)
+		menu->selection = evsel;
+}
+
+static int perf_evsel_menu__run(struct evsel_menu *menu,
+				int nr_events, const char *help,
+				struct hist_browser_timer *hbt,
+				bool warn_lost_event)
+{
+	struct evlist *evlist = menu->b.priv;
+	struct evsel *pos;
+	const char *title = "Available samples";
+	int delay_secs = hbt ? hbt->refresh : 0;
+	int key;
+
+	if (ui_browser__show(&menu->b, title,
+			     "ESC: exit, ENTER|->: Browse histograms") < 0)
+		return -1;
+
+	while (1) {
+		key = ui_browser__run(&menu->b, delay_secs);
+
+		switch (key) {
+		case K_TIMER:
+			if (hbt)
+				hbt->timer(hbt->arg);
+
+			if (!menu->lost_events_warned &&
+			    menu->lost_events &&
+			    warn_lost_event) {
+				ui_browser__warn_lost_events(&menu->b);
+				menu->lost_events_warned = true;
+			}
+			continue;
+		case K_RIGHT:
+		case K_ENTER:
+			if (!menu->selection)
+				continue;
+			pos = menu->selection;
+browse_hists:
+			evlist__set_selected(evlist, pos);
+			/*
+			 * Give the calling tool a chance to populate the non
+			 * default evsel resorted hists tree.
+			 */
+			if (hbt)
+				hbt->timer(hbt->arg);
+			key = evsel__hists_browse(pos, nr_events, help, true, hbt,
+						  menu->min_pcnt, menu->env,
+						  warn_lost_event);
+			ui_browser__show_title(&menu->b, title);
+			switch (key) {
+			case K_TAB:
+				if (pos->core.node.next == &evlist__core(evlist)->entries)
+					pos = evlist__first(evlist);
+				else
+					pos = evsel__next(pos);
+				goto browse_hists;
+			case K_UNTAB:
+				if (pos->core.node.prev == &evlist__core(evlist)->entries)
+					pos = evlist__last(evlist);
+				else
+					pos = evsel__prev(pos);
+				goto browse_hists;
+			case K_SWITCH_INPUT_DATA:
+			case K_RELOAD:
+			case 'q':
+			case CTRL('c'):
+				goto out;
+			case K_ESC:
+			default:
+				continue;
+			}
+		case K_LEFT:
+			continue;
+		case K_ESC:
+			if (!ui_browser__dialog_yesno(&menu->b,
+					       "Do you really want to exit?"))
+				continue;
+			/* Fall thru */
+		case 'q':
+		case CTRL('c'):
+			goto out;
+		default:
+			ui_browser__warn_unhandled_hotkey(&menu->b, key, delay_secs, NULL);
+			continue;
+		}
+	}
+
+out:
+	ui_browser__hide(&menu->b);
+	return key;
+}
+
+static bool filter_group_entries(struct ui_browser *browser __maybe_unused,
+				 void *entry)
+{
+	struct evsel *evsel = list_entry(entry, struct evsel, core.node);
+
+	if (symbol_conf.event_group && !evsel__is_group_leader(evsel))
+		return true;
+
+	return false;
+}
+
+static int __evlist__tui_browse_hists(struct evlist *evlist, int nr_entries, const char *help,
+				      struct hist_browser_timer *hbt, float min_pcnt, struct perf_env *env,
+				      bool warn_lost_event)
+{
+	struct evsel *pos;
+	struct evsel_menu menu = {
+		.b = {
+			.entries    = &evlist__core(evlist)->entries,
+			.refresh    = ui_browser__list_head_refresh,
+			.seek	    = ui_browser__list_head_seek,
+			.write	    = perf_evsel_menu__write,
+			.filter	    = filter_group_entries,
+			.nr_entries = nr_entries,
+			.priv	    = evlist,
+		},
+		.min_pcnt = min_pcnt,
+		.env = env,
+	};
+
+	ui_helpline__push("Press ESC to exit");
+
+	evlist__for_each_entry(evlist, pos) {
+		const char *ev_name = evsel__name(pos);
+		size_t line_len = strlen(ev_name) + 7;
+
+		if (menu.b.width < line_len)
+			menu.b.width = line_len;
+	}
+
+	return perf_evsel_menu__run(&menu, nr_entries, help,
+				    hbt, warn_lost_event);
+}
+
+static bool evlist__single_entry(struct evlist *evlist)
+{
+	int nr_entries = evlist__nr_entries(evlist);
+
+	if (nr_entries == 1)
+	       return true;
+
+	if (nr_entries == 2) {
+		struct evsel *last = evlist__last(evlist);
+
+		if (evsel__is_dummy_event(last))
+			return true;
+	}
+
+	return false;
+}
+
+int evlist__tui_browse_hists(struct evlist *evlist, const char *help, struct hist_browser_timer *hbt,
+			     float min_pcnt, struct perf_env *env, bool warn_lost_event)
+{
+	int nr_entries = evlist__nr_entries(evlist);
+
+	if (evlist__single_entry(evlist)) {
+single_entry: {
+		struct evsel *first = evlist__first(evlist);
+
+		return evsel__hists_browse(first, nr_entries, help, false, hbt, min_pcnt,
+					   env, warn_lost_event);
+	}
+	}
+
+	if (symbol_conf.event_group) {
+		struct evsel *pos;
+
+		nr_entries = 0;
+		evlist__for_each_entry(evlist, pos) {
+			if (evsel__is_group_leader(pos))
+				nr_entries++;
+		}
+
+		if (nr_entries == 1)
+			goto single_entry;
+	}
+
+	return __evlist__tui_browse_hists(evlist, nr_entries, help, hbt, min_pcnt, env,
+					  warn_lost_event);
+}
+
+static int block_hists_browser__title(struct hist_browser *browser, char *bf,
+				      size_t size)
+{
+	struct hists *hists = evsel__hists(browser->block_evsel);
+	const char *evname = evsel__name(browser->block_evsel);
+	unsigned long nr_samples = hists->stats.nr_samples;
+	int ret;
+
+	ret = scnprintf(bf, size, "# Samples: %lu", nr_samples);
+	if (evname)
+		scnprintf(bf + ret, size -  ret, " of event '%s'", evname);
+
+	return 0;
+}
+
+int block_hists_tui_browse(struct block_hist *bh, struct evsel *evsel,
+			   float min_percent, struct perf_env *env)
+{
+	struct hists *hists = &bh->block_hists;
+	struct hist_browser *browser;
+	int key = -1;
+	struct popup_action action;
+	char *br_cntr_text = NULL;
+	static const char help[] =
+	" q/ESC         Quit \n"
+	" B             Branch counter abbr list (Optional)\n";
+
+	browser = hist_browser__new(hists);
+	if (!browser)
+		return -1;
+
+	browser->block_evsel = evsel;
+	browser->title = block_hists_browser__title;
+	browser->min_pcnt = min_percent;
+	browser->env = env;
+
+	/* reset abort key so that it can get Ctrl-C as a key */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+	SLtty_set_suspend_state(true);
+
+	memset(&action, 0, sizeof(action));
+
+	if (!annotation_br_cntr_abbr_list(&br_cntr_text, evsel, false))
+		annotate_opts.show_br_cntr = true;
+
+	while (1) {
+		key = hist_browser__run(browser, "? - help", true, 0);
+
+		switch (key) {
+		case 'q':
+		case K_ESC:
+			goto out;
+		case '?':
+			ui_browser__help_window(&browser->b, help);
+			break;
+		case 'a':
+		case K_ENTER:
+			if (!browser->selection ||
+			    !browser->selection->sym) {
+				continue;
+			}
+
+			action.ms.map = browser->selection->map;
+			action.ms.sym = browser->selection->sym;
+			do_annotate(browser, &action);
+			continue;
+		case 'B':
+			if (br_cntr_text) {
+				ui__question_window("Branch counter abbr list",
+						    br_cntr_text, "Press any key...", 0);
+			} else {
+				ui__question_window("Branch counter abbr list",
+						    "\n The branch counter is not available.\n",
+						    "Press any key...", 0);
+			}
+			continue;
+		default:
+			ui_browser__warn_unhandled_hotkey(&browser->b, key, 0,
+							  ", use '?' to see actions");
+			continue;
+		}
+	}
+
+out:
+	hist_browser__delete(browser);
+	free(br_cntr_text);
+	return 0;
+}
diff --git a/tools/perf/ui/browsers/hists.h b/tools/perf/ui/browsers/hists.h
new file mode 100644
index 000000000..de46f6c56
--- /dev/null
+++ b/tools/perf/ui/browsers/hists.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_BROWSER_HISTS_H_
+#define _PERF_UI_BROWSER_HISTS_H_ 1
+
+#include "ui/browser.h"
+
+struct evsel;
+
+struct hist_browser {
+	struct ui_browser   b;
+	struct hists	    *hists;
+	struct hist_entry   *he_selection;
+	struct map_symbol   *selection;
+	struct hist_browser_timer *hbt;
+	struct pstack	    *pstack;
+	struct perf_env	    *env;
+	struct evsel	    *block_evsel;
+	int		     print_seq;
+	bool		     show_dso;
+	bool		     show_headers;
+	float		     min_pcnt;
+	u64		     nr_non_filtered_entries;
+	u64		     nr_hierarchy_entries;
+	u64		     nr_callchain_rows;
+	bool		     c2c_filter;
+
+	/* Get title string. */
+	int                  (*title)(struct hist_browser *browser,
+			     char *bf, size_t size);
+};
+
+struct hist_browser *hist_browser__new(struct hists *hists);
+void hist_browser__delete(struct hist_browser *browser);
+int hist_browser__run(struct hist_browser *browser, const char *help,
+		      bool warn_lost_event, int key);
+void hist_browser__init(struct hist_browser *browser,
+			struct hists *hists);
+#endif /* _PERF_UI_BROWSER_HISTS_H_ */
diff --git a/tools/perf/ui/browsers/map.c b/tools/perf/ui/browsers/map.c
new file mode 100644
index 000000000..075a575cd
--- /dev/null
+++ b/tools/perf/ui/browsers/map.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <elf.h>
+#include <inttypes.h>
+#include <sys/ttydefaults.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/bitops.h>
+#include "../../util/debug.h"
+#include "../../util/map.h"
+#include "../../util/dso.h"
+#include "../../util/symbol.h"
+#include "../browser.h"
+#include "../helpline.h"
+#include "../keysyms.h"
+#include "map.h"
+
+#include <linux/ctype.h>
+
+struct map_browser {
+	struct ui_browser b;
+	struct map	  *map;
+	u8		  addrlen;
+};
+
+static void map_browser__write(struct ui_browser *browser, void *nd, int row)
+{
+	struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+	struct map_browser *mb = container_of(browser, struct map_browser, b);
+	bool current_entry = ui_browser__is_current_entry(browser, row);
+	int width;
+
+	ui_browser__set_percent_color(browser, 0, current_entry);
+	ui_browser__printf(browser, "%*" PRIx64 " %*" PRIx64 " %c ",
+			   mb->addrlen, sym->start, mb->addrlen, sym->end,
+			   symbol__binding(sym) == STB_GLOBAL ? 'g' :
+				symbol__binding(sym) == STB_LOCAL  ? 'l' : 'w');
+	width = browser->width - ((mb->addrlen * 2) + 4);
+	if (width > 0)
+		ui_browser__write_nstring(browser, sym->name, width);
+}
+
+/* FIXME uber-kludgy, see comment on cmd_report... */
+static u32 *symbol__browser_index(struct symbol *browser)
+{
+	return ((void *)browser) - sizeof(struct rb_node) - sizeof(u32);
+}
+
+static int map_browser__search(struct map_browser *browser)
+{
+	char target[512];
+	struct symbol *sym;
+	int err = ui_browser__input_window("Search by name/addr",
+					   "Prefix with 0x to search by address",
+					   target, "ENTER: OK, ESC: Cancel", 0);
+	if (err != K_ENTER)
+		return -1;
+
+	if (target[0] == '0' && tolower(target[1]) == 'x') {
+		u64 addr = strtoull(target, NULL, 16);
+		sym = map__find_symbol(browser->map, addr);
+	} else
+		sym = map__find_symbol_by_name(browser->map, target);
+
+	if (sym != NULL) {
+		u32 *idx = symbol__browser_index(sym);
+
+		browser->b.top = &sym->rb_node;
+		browser->b.index = browser->b.top_idx = *idx;
+	} else
+		ui_helpline__fpush("%s not found!", target);
+
+	return 0;
+}
+
+static int map_browser__run(struct map_browser *browser)
+{
+	int key;
+
+	if (ui_browser__show(&browser->b, dso__long_name(map__dso(browser->map)),
+			     "Press ESC to exit, %s / to search",
+			     verbose > 0 ? "" : "restart with -v to use") < 0)
+		return -1;
+
+	while (1) {
+		key = ui_browser__run(&browser->b, 0);
+
+		switch (key) {
+		case '/':
+			if (verbose > 0)
+				map_browser__search(browser);
+			/* fall thru */
+		default:
+			ui_browser__warn_unhandled_hotkey(&browser->b, key, 0, NULL);
+			continue;
+                case K_LEFT:
+                case K_ESC:
+                case 'q':
+                case CTRL('c'):
+                        goto out;
+		}
+	}
+out:
+	ui_browser__hide(&browser->b);
+	return key;
+}
+
+int map__browse(struct map *map)
+{
+	struct map_browser mb = {
+		.b = {
+			.entries = dso__symbols(map__dso(map)),
+			.refresh = ui_browser__rb_tree_refresh,
+			.seek	 = ui_browser__rb_tree_seek,
+			.write	 = map_browser__write,
+		},
+		.map = map,
+	};
+	struct rb_node *nd;
+	char tmp[BITS_PER_LONG / 4];
+	u64 maxaddr = 0;
+
+	for (nd = rb_first(mb.b.entries); nd; nd = rb_next(nd)) {
+		struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
+
+		if (maxaddr < pos->end)
+			maxaddr = pos->end;
+		if (verbose > 0) {
+			u32 *idx = symbol__browser_index(pos);
+			*idx = mb.b.nr_entries;
+		}
+		++mb.b.nr_entries;
+	}
+
+	mb.addrlen = snprintf(tmp, sizeof(tmp), "%" PRIx64, maxaddr);
+	return map_browser__run(&mb);
+}
diff --git a/tools/perf/ui/browsers/map.h b/tools/perf/ui/browsers/map.h
new file mode 100644
index 000000000..0ed7dbb3a
--- /dev/null
+++ b/tools/perf/ui/browsers/map.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_MAP_BROWSER_H_
+#define _PERF_UI_MAP_BROWSER_H_ 1
+struct map;
+
+int map__browse(struct map *map);
+#endif /* _PERF_UI_MAP_BROWSER_H_ */
diff --git a/tools/perf/ui/browsers/res_sample.c b/tools/perf/ui/browsers/res_sample.c
new file mode 100644
index 000000000..5f60e515b
--- /dev/null
+++ b/tools/perf/ui/browsers/res_sample.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Display a menu with individual samples to browse with perf script */
+#include "hist.h"
+#include "evsel.h"
+#include "hists.h"
+#include "sort.h"
+#include "config.h"
+#include "time-utils.h"
+#include "../util.h"
+#include "../../util/util.h" // perf_exe()
+#include "../../perf.h"
+#include <stdlib.h>
+#include <string.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+
+static u64 context_len = 10 * NSEC_PER_MSEC;
+
+static int res_sample_config(const char *var, const char *value, void *data __maybe_unused)
+{
+	if (!strcmp(var, "samples.context"))
+		return perf_config_u64(&context_len, var, value);
+	return 0;
+}
+
+void res_sample_init(void)
+{
+	perf_config(res_sample_config, NULL);
+}
+
+int res_sample_browse(struct res_sample *res_samples, int num_res,
+		      struct evsel *evsel, enum rstype rstype)
+{
+	char **names;
+	int i, n;
+	int choice;
+	char *cmd;
+	char pbuf[256], tidbuf[32], cpubuf[32];
+	const char *perf = perf_exe(pbuf, sizeof pbuf);
+	char trange[128], tsample[64];
+	struct res_sample *r;
+	char extra_format[256];
+
+	names = calloc(num_res, sizeof(char *));
+	if (!names)
+		return -1;
+	for (i = 0; i < num_res; i++) {
+		char tbuf[64];
+
+		timestamp__scnprintf_nsec(res_samples[i].time, tbuf, sizeof tbuf);
+		if (asprintf(&names[i], "%s: CPU %d tid %d", tbuf,
+			     res_samples[i].cpu, res_samples[i].tid) < 0) {
+			while (--i >= 0)
+				zfree(&names[i]);
+			free(names);
+			return -1;
+		}
+	}
+	choice = ui__popup_menu(num_res, names, NULL);
+	for (i = 0; i < num_res; i++)
+		zfree(&names[i]);
+	free(names);
+
+	if (choice < 0 || choice >= num_res)
+		return -1;
+	r = &res_samples[choice];
+
+	n = timestamp__scnprintf_nsec(r->time - context_len, trange, sizeof trange);
+	trange[n++] = ',';
+	timestamp__scnprintf_nsec(r->time + context_len, trange + n, sizeof trange - n);
+
+	timestamp__scnprintf_nsec(r->time, tsample, sizeof tsample);
+
+	attr_to_script(extra_format, &evsel->core.attr);
+
+	if (asprintf(&cmd, "%s script %s%s --time %s %s%s %s%s --ns %s %s %s %s %s | less +/%s",
+		     perf,
+		     input_name ? "-i " : "",
+		     input_name ? input_name : "",
+		     trange,
+		     r->cpu >= 0 ? "--cpu " : "",
+		     r->cpu >= 0 ? (sprintf(cpubuf, "%d", r->cpu), cpubuf) : "",
+		     r->tid ? "--tid " : "",
+		     r->tid ? (sprintf(tidbuf, "%d", r->tid), tidbuf) : "",
+		     extra_format,
+		     rstype == A_ASM ? "-F +disasm" :
+		     rstype == A_SOURCE ? "-F +srcline,+srccode" : "",
+		     symbol_conf.inline_name ? "--inline" : "",
+		     "--show-lost-events ",
+		     r->tid ? "--show-switch-events --show-task-events " : "",
+		     tsample) < 0)
+		return -1;
+	run_script(cmd);
+	free(cmd);
+	return 0;
+}
diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c
new file mode 100644
index 000000000..1e8c2c2f9
--- /dev/null
+++ b/tools/perf/ui/browsers/scripts.c
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../util/util.h" // perf_exe()
+#include "../util.h"
+#include "../../util/evlist.h"
+#include "../../util/hist.h"
+#include "../../util/debug.h"
+#include "../../util/session.h"
+#include "../../util/symbol.h"
+#include "../browser.h"
+#include "../libslang.h"
+#include "config.h"
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+#include <subcmd/exec-cmd.h>
+#include <stdlib.h>
+
+#define SCRIPT_NAMELEN	128
+#define SCRIPT_MAX_NO	64
+/*
+ * Usually the full path for a script is:
+ *	/home/username/libexec/perf-core/scripts/python/xxx.py
+ *	/home/username/libexec/perf-core/scripts/perl/xxx.pl
+ * So 256 should be long enough to contain the full path.
+ */
+#define SCRIPT_FULLPATH_LEN	256
+
+struct script_config {
+	const char **names;
+	char **paths;
+	int index;
+	const char *perf;
+	char extra_format[256];
+};
+
+void attr_to_script(char *extra_format, struct perf_event_attr *attr)
+{
+	extra_format[0] = 0;
+	if (attr->read_format & PERF_FORMAT_GROUP)
+		strcat(extra_format, " -F +metric");
+	if (attr->sample_type & PERF_SAMPLE_BRANCH_STACK)
+		strcat(extra_format, " -F +brstackinsn --xed");
+	if (attr->sample_type & PERF_SAMPLE_REGS_INTR)
+		strcat(extra_format, " -F +iregs");
+	if (attr->sample_type & PERF_SAMPLE_REGS_USER)
+		strcat(extra_format, " -F +uregs");
+	if (attr->sample_type & PERF_SAMPLE_PHYS_ADDR)
+		strcat(extra_format, " -F +phys_addr");
+}
+
+static int add_script_option(const char *name, const char *opt,
+			     struct script_config *c)
+{
+	c->names[c->index] = name;
+	if (asprintf(&c->paths[c->index],
+		     "%s script %s -F +metric %s %s",
+		     c->perf, opt, symbol_conf.inline_name ? " --inline" : "",
+		     c->extra_format) < 0)
+		return -1;
+	c->index++;
+	return 0;
+}
+
+static int scripts_config(const char *var, const char *value, void *data)
+{
+	struct script_config *c = data;
+
+	if (!strstarts(var, "scripts."))
+		return -1;
+	if (c->index >= SCRIPT_MAX_NO)
+		return -1;
+	c->names[c->index] = strdup(var + 7);
+	if (!c->names[c->index])
+		return -1;
+	if (asprintf(&c->paths[c->index], "%s %s", value,
+		     c->extra_format) < 0)
+		return -1;
+	c->index++;
+	return 0;
+}
+
+/*
+ * Some scripts specify the required events in their "xxx-record" file,
+ * this function will check if the events in perf.data match those
+ * mentioned in the "xxx-record".
+ *
+ * Fixme: All existing "xxx-record" are all in good formats "-e event ",
+ * which is covered well now. And new parsing code should be added to
+ * cover the future complex formats like event groups etc.
+ */
+static int check_ev_match(int dir_fd, const char *scriptname, struct perf_session *session)
+{
+	char line[BUFSIZ];
+	FILE *fp;
+
+	{
+		char filename[NAME_MAX + 5];
+		int fd;
+
+		scnprintf(filename, sizeof(filename), "bin/%s-record", scriptname);
+		fd = openat(dir_fd, filename, O_RDONLY);
+		if (fd == -1)
+			return -1;
+		fp = fdopen(fd, "r");
+		if (!fp)
+			return -1;
+	}
+
+	while (fgets(line, sizeof(line), fp)) {
+		char *p = skip_spaces(line);
+
+		if (*p == '#')
+			continue;
+
+		while (strlen(p)) {
+			int match, len;
+			struct evsel *pos;
+			char evname[128];
+
+			p = strstr(p, "-e");
+			if (!p)
+				break;
+
+			p += 2;
+			p = skip_spaces(p);
+			len = strcspn(p, " \t");
+			if (!len)
+				break;
+
+			snprintf(evname, len + 1, "%s", p);
+
+			match = 0;
+			evlist__for_each_entry(session->evlist, pos) {
+				if (evsel__name_is(pos, evname)) {
+					match = 1;
+					break;
+				}
+			}
+
+			if (!match) {
+				fclose(fp);
+				return -1;
+			}
+		}
+	}
+
+	fclose(fp);
+	return 0;
+}
+
+/*
+ * Return -1 if none is found, otherwise the actual scripts number.
+ *
+ * Currently the only user of this function is the script browser, which
+ * will list all statically runnable scripts, select one, execute it and
+ * show the output in a perf browser.
+ */
+static int find_scripts(char **scripts_array, char **scripts_path_array, int num,
+		 int pathlen)
+{
+	struct dirent *script_dirent, *lang_dirent;
+	int scripts_dir_fd, lang_dir_fd;
+	DIR *scripts_dir, *lang_dir;
+	struct perf_session *session;
+	struct perf_data data = {
+		.path = input_name,
+		.mode = PERF_DATA_MODE_READ,
+	};
+	char *temp;
+	int i = 0;
+	const char *exec_path = get_argv_exec_path();
+
+	session = perf_session__new(&data, NULL);
+	if (IS_ERR(session))
+		return PTR_ERR(session);
+
+	{
+		char scripts_path[PATH_MAX];
+
+		snprintf(scripts_path, sizeof(scripts_path), "%s/scripts", exec_path);
+		scripts_dir_fd = open(scripts_path, O_DIRECTORY);
+		pr_err("Failed to open directory '%s'", scripts_path);
+		if (scripts_dir_fd == -1) {
+			perf_session__delete(session);
+			return -1;
+		}
+	}
+	scripts_dir = fdopendir(scripts_dir_fd);
+	if (!scripts_dir) {
+		close(scripts_dir_fd);
+		perf_session__delete(session);
+		return -1;
+	}
+
+	while ((lang_dirent = readdir(scripts_dir)) != NULL) {
+		if (lang_dirent->d_type != DT_DIR &&
+		    (lang_dirent->d_type == DT_UNKNOWN &&
+		     !is_directory_at(scripts_dir_fd, lang_dirent->d_name)))
+			continue;
+		if (!strcmp(lang_dirent->d_name, ".") || !strcmp(lang_dirent->d_name, ".."))
+			continue;
+
+#ifndef HAVE_LIBPERL_SUPPORT
+		if (strstr(lang_dirent->d_name, "perl"))
+			continue;
+#endif
+#ifndef HAVE_LIBPYTHON_SUPPORT
+		if (strstr(lang_dirent->d_name, "python"))
+			continue;
+#endif
+
+		lang_dir_fd = openat(scripts_dir_fd, lang_dirent->d_name, O_DIRECTORY);
+		if (lang_dir_fd == -1)
+			continue;
+		lang_dir = fdopendir(lang_dir_fd);
+		if (!lang_dir) {
+			close(lang_dir_fd);
+			continue;
+		}
+		while ((script_dirent = readdir(lang_dir)) != NULL) {
+			if (script_dirent->d_type == DT_DIR)
+				continue;
+			if (script_dirent->d_type == DT_UNKNOWN &&
+			    is_directory_at(lang_dir_fd, script_dirent->d_name))
+				continue;
+			/* Skip those real time scripts: xxxtop.p[yl] */
+			if (strstr(script_dirent->d_name, "top."))
+				continue;
+			if (i >= num)
+				break;
+			scnprintf(scripts_path_array[i], pathlen, "%s/scripts/%s/%s",
+				exec_path,
+				lang_dirent->d_name,
+				script_dirent->d_name);
+			temp = strchr(script_dirent->d_name, '.');
+			snprintf(scripts_array[i],
+				(temp - script_dirent->d_name) + 1,
+				"%s", script_dirent->d_name);
+
+			if (check_ev_match(lang_dir_fd, scripts_array[i], session))
+				continue;
+
+			i++;
+		}
+		closedir(lang_dir);
+	}
+
+	closedir(scripts_dir);
+	perf_session__delete(session);
+	return i;
+}
+
+/*
+ * When success, will copy the full path of the selected script
+ * into  the buffer pointed by script_name, and return 0.
+ * Return -1 on failure.
+ */
+static int list_scripts(char *script_name, bool *custom,
+			struct evsel *evsel)
+{
+	char *buf, *paths[SCRIPT_MAX_NO], *names[SCRIPT_MAX_NO];
+	int i, num, choice;
+	int ret = 0;
+	int max_std, custom_perf;
+	char pbuf[256];
+	const char *perf = perf_exe(pbuf, sizeof pbuf);
+	struct script_config scriptc = {
+		.names = (const char **)names,
+		.paths = paths,
+		.perf = perf
+	};
+
+	script_name[0] = 0;
+
+	/* Preset the script name to SCRIPT_NAMELEN */
+	buf = malloc(SCRIPT_MAX_NO * (SCRIPT_NAMELEN + SCRIPT_FULLPATH_LEN));
+	if (!buf)
+		return -1;
+
+	if (evsel)
+		attr_to_script(scriptc.extra_format, &evsel->core.attr);
+	add_script_option("Show individual samples", "", &scriptc);
+	add_script_option("Show individual samples with assembler", "-F +disasm",
+			  &scriptc);
+	add_script_option("Show individual samples with source", "-F +srcline,+srccode",
+			  &scriptc);
+	perf_config(scripts_config, &scriptc);
+	custom_perf = scriptc.index;
+	add_script_option("Show samples with custom perf script arguments", "", &scriptc);
+	i = scriptc.index;
+	max_std = i;
+
+	for (; i < SCRIPT_MAX_NO; i++) {
+		names[i] = buf + (i - max_std) * (SCRIPT_NAMELEN + SCRIPT_FULLPATH_LEN);
+		paths[i] = names[i] + SCRIPT_NAMELEN;
+	}
+
+	num = find_scripts(names + max_std, paths + max_std, SCRIPT_MAX_NO - max_std,
+			SCRIPT_FULLPATH_LEN);
+	if (num < 0)
+		num = 0;
+	choice = ui__popup_menu(num + max_std, (char * const *)names, NULL);
+	if (choice < 0) {
+		ret = -1;
+		goto out;
+	}
+	if (choice == custom_perf) {
+		char script_args[50];
+		int key = ui_browser__input_window("perf script command",
+				"Enter perf script command line (without perf script prefix)",
+				script_args, "", 0);
+		if (key != K_ENTER) {
+			ret = -1;
+			goto out;
+		}
+		sprintf(script_name, "%s script %s", perf, script_args);
+	} else if (choice < num + max_std) {
+		strcpy(script_name, paths[choice]);
+	}
+	*custom = choice >= max_std;
+
+out:
+	free(buf);
+	for (i = 0; i < max_std; i++)
+		zfree(&paths[i]);
+	return ret;
+}
+
+void run_script(char *cmd)
+{
+	pr_debug("Running %s\n", cmd);
+	SLang_reset_tty();
+	if (system(cmd) < 0)
+		pr_warning("Cannot run %s\n", cmd);
+	/*
+	 * SLang doesn't seem to reset the whole terminal, so be more
+	 * forceful to get back to the original state.
+	 */
+	printf("\033[c\033[H\033[J");
+	fflush(stdout);
+	SLang_init_tty(0, 0, 0);
+	SLtty_set_suspend_state(true);
+	SLsmg_refresh();
+}
+
+int script_browse(const char *script_opt, struct evsel *evsel)
+{
+	char *cmd, script_name[SCRIPT_FULLPATH_LEN];
+	bool custom = false;
+
+	memset(script_name, 0, SCRIPT_FULLPATH_LEN);
+	if (list_scripts(script_name, &custom, evsel))
+		return -1;
+
+	if (asprintf(&cmd, "%s%s %s %s%s 2>&1 | less",
+			custom ? "perf script -s " : "",
+			script_name,
+			script_opt ? script_opt : "",
+			input_name ? "-i " : "",
+			input_name ? input_name : "") < 0)
+		return -1;
+
+	run_script(cmd);
+	free(cmd);
+
+	return 0;
+}
diff --git a/tools/perf/ui/gtk/Build b/tools/perf/ui/gtk/Build
new file mode 100644
index 000000000..eef708c50
--- /dev/null
+++ b/tools/perf/ui/gtk/Build
@@ -0,0 +1,14 @@
+CFLAGS_gtk += -fPIC $(GTK_CFLAGS) -Wno-deprecated-declarations
+
+gtk-y += browser.o
+gtk-y += hists.o
+gtk-y += setup.o
+gtk-y += util.o
+gtk-y += helpline.o
+gtk-y += progress.o
+gtk-y += annotate.o
+gtk-y += zalloc.o
+
+$(OUTPUT)ui/gtk/zalloc.o: ../lib/zalloc.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
diff --git a/tools/perf/ui/gtk/annotate.c b/tools/perf/ui/gtk/annotate.c
new file mode 100644
index 000000000..8920e2984
--- /dev/null
+++ b/tools/perf/ui/gtk/annotate.c
@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "gtk.h"
+#include "util/sort.h"
+#include "util/debug.h"
+#include "util/annotate.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/map.h"
+#include "util/dso.h"
+#include "util/symbol.h"
+#include "ui/helpline.h"
+#include <inttypes.h>
+#include <signal.h>
+
+enum {
+	ANN_COL__PERCENT,
+	ANN_COL__OFFSET,
+	ANN_COL__LINE,
+
+	MAX_ANN_COLS
+};
+
+static const char *const col_names[] = {
+	"Overhead",
+	"Offset",
+	"Line"
+};
+
+static int perf_gtk__get_percent(char *buf, size_t size, struct symbol *sym,
+				 struct disasm_line *dl, const struct evsel *evsel)
+{
+	struct annotation *notes;
+	struct sym_hist *symhist;
+	struct sym_hist_entry *entry;
+	double percent = 0.0;
+	const char *markup;
+	int ret = 0;
+	u64 nr_samples = 0;
+
+	strcpy(buf, "");
+
+	if (dl->al.offset == (s64) -1)
+		return 0;
+
+	notes = symbol__annotation(sym);
+	symhist = annotation__histogram(notes, evsel);
+	entry = annotated_source__hist_entry(notes->src, evsel, dl->al.offset);
+	if (entry)
+		nr_samples = entry->nr_samples;
+
+	if (!symbol_conf.event_group && nr_samples == 0)
+		return 0;
+
+	percent = 100.0 * nr_samples / symhist->nr_samples;
+
+	markup = perf_gtk__get_percent_color(percent);
+	if (markup)
+		ret += scnprintf(buf, size, "%s", markup);
+	ret += scnprintf(buf + ret, size - ret, "%6.2f%%", percent);
+	if (markup)
+		ret += scnprintf(buf + ret, size - ret, "</span>");
+
+	return ret;
+}
+
+static int perf_gtk__get_offset(char *buf, size_t size, struct map_symbol *ms,
+				struct disasm_line *dl)
+{
+	u64 start = map__rip_2objdump(ms->map, ms->sym->start);
+
+	strcpy(buf, "");
+
+	if (dl->al.offset == (s64) -1)
+		return 0;
+
+	return scnprintf(buf, size, "%"PRIx64, start + dl->al.offset);
+}
+
+static int perf_gtk__get_line(char *buf, size_t size, struct disasm_line *dl)
+{
+	int ret = 0;
+	char *line = g_markup_escape_text(dl->al.line, -1);
+	const char *markup = "<span fgcolor='gray'>";
+
+	strcpy(buf, "");
+
+	if (!line)
+		return 0;
+
+	if (dl->al.offset != (s64) -1)
+		markup = NULL;
+
+	if (markup)
+		ret += scnprintf(buf, size, "%s", markup);
+	ret += scnprintf(buf + ret, size - ret, "%s", line);
+	if (markup)
+		ret += scnprintf(buf + ret, size - ret, "</span>");
+
+	g_free(line);
+	return ret;
+}
+
+static int perf_gtk__annotate_symbol(GtkWidget *window, struct map_symbol *ms,
+				struct evsel *evsel,
+				struct hist_browser_timer *hbt __maybe_unused)
+{
+	struct symbol *sym = ms->sym;
+	struct disasm_line *pos, *n;
+	struct annotation *notes;
+	GType col_types[MAX_ANN_COLS];
+	GtkCellRenderer *renderer;
+	GtkListStore *store;
+	GtkWidget *view;
+	int i;
+	char s[512];
+
+	notes = symbol__annotation(sym);
+
+	for (i = 0; i < MAX_ANN_COLS; i++) {
+		col_types[i] = G_TYPE_STRING;
+	}
+	store = gtk_list_store_newv(MAX_ANN_COLS, col_types);
+
+	view = gtk_tree_view_new();
+	renderer = gtk_cell_renderer_text_new();
+
+	for (i = 0; i < MAX_ANN_COLS; i++) {
+		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
+					-1, col_names[i], renderer, "markup",
+					i, NULL);
+	}
+
+	gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));
+	g_object_unref(GTK_TREE_MODEL(store));
+
+	list_for_each_entry(pos, &notes->src->source, al.node) {
+		GtkTreeIter iter;
+		int ret = 0;
+
+		gtk_list_store_append(store, &iter);
+
+		if (evsel__is_group_event(evsel)) {
+			struct evsel *cur_evsel;
+
+			for_each_group_evsel(cur_evsel, evsel__leader(evsel)) {
+				ret += perf_gtk__get_percent(s + ret,
+							     sizeof(s) - ret,
+							     sym, pos,
+							     cur_evsel);
+				ret += scnprintf(s + ret, sizeof(s) - ret, " ");
+			}
+		} else {
+			ret = perf_gtk__get_percent(s, sizeof(s), sym, pos, evsel);
+		}
+
+		if (ret)
+			gtk_list_store_set(store, &iter, ANN_COL__PERCENT, s, -1);
+		if (perf_gtk__get_offset(s, sizeof(s), ms, pos))
+			gtk_list_store_set(store, &iter, ANN_COL__OFFSET, s, -1);
+		if (perf_gtk__get_line(s, sizeof(s), pos))
+			gtk_list_store_set(store, &iter, ANN_COL__LINE, s, -1);
+	}
+
+	gtk_container_add(GTK_CONTAINER(window), view);
+
+	list_for_each_entry_safe(pos, n, &notes->src->source, al.node) {
+		list_del_init(&pos->al.node);
+		disasm_line__free(pos);
+	}
+
+	return 0;
+}
+
+static int symbol__gtk_annotate(struct map_symbol *ms, struct evsel *evsel,
+				struct hist_browser_timer *hbt)
+{
+	struct dso *dso = map__dso(ms->map);
+	struct symbol *sym = ms->sym;
+	GtkWidget *window;
+	GtkWidget *notebook;
+	GtkWidget *scrolled_window;
+	GtkWidget *tab_label;
+	int err;
+
+	if (dso__annotate_warned(dso))
+		return -1;
+
+	err = symbol__annotate(ms, evsel, NULL);
+	if (err) {
+		char msg[BUFSIZ];
+
+		dso__set_annotate_warned(dso);
+		symbol__strerror_disassemble(ms, err, msg, sizeof(msg));
+		ui__error("Couldn't annotate %s: %s\n", sym->name, msg);
+		return -1;
+	}
+
+	symbol__calc_percent(sym, evsel);
+
+	if (perf_gtk__is_active_context(pgctx)) {
+		window = pgctx->main_window;
+		notebook = pgctx->notebook;
+	} else {
+		GtkWidget *vbox;
+		GtkWidget *infobar;
+		GtkWidget *statbar;
+
+		signal(SIGSEGV, perf_gtk__signal);
+		signal(SIGFPE,  perf_gtk__signal);
+		signal(SIGINT,  perf_gtk__signal);
+		signal(SIGQUIT, perf_gtk__signal);
+		signal(SIGTERM, perf_gtk__signal);
+
+		window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+		gtk_window_set_title(GTK_WINDOW(window), "perf annotate");
+
+		g_signal_connect(window, "delete_event", gtk_main_quit, NULL);
+
+		pgctx = perf_gtk__activate_context(window);
+		if (!pgctx)
+			return -1;
+
+		vbox = gtk_vbox_new(FALSE, 0);
+		notebook = gtk_notebook_new();
+		pgctx->notebook = notebook;
+
+		gtk_box_pack_start(GTK_BOX(vbox), notebook, TRUE, TRUE, 0);
+
+		infobar = perf_gtk__setup_info_bar();
+		if (infobar) {
+			gtk_box_pack_start(GTK_BOX(vbox), infobar,
+					   FALSE, FALSE, 0);
+		}
+
+		statbar = perf_gtk__setup_statusbar();
+		gtk_box_pack_start(GTK_BOX(vbox), statbar, FALSE, FALSE, 0);
+
+		gtk_container_add(GTK_CONTAINER(window), vbox);
+	}
+
+	scrolled_window = gtk_scrolled_window_new(NULL, NULL);
+	tab_label = gtk_label_new(sym->name);
+
+	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
+				       GTK_POLICY_AUTOMATIC,
+				       GTK_POLICY_AUTOMATIC);
+
+	gtk_notebook_append_page(GTK_NOTEBOOK(notebook), scrolled_window,
+				 tab_label);
+
+	perf_gtk__annotate_symbol(scrolled_window, ms, evsel, hbt);
+	return 0;
+}
+
+int hist_entry__gtk_annotate(struct hist_entry *he,
+			     struct evsel *evsel,
+			     struct hist_browser_timer *hbt)
+{
+	return symbol__gtk_annotate(&he->ms, evsel, hbt);
+}
+
+void perf_gtk__show_annotations(void)
+{
+	GtkWidget *window;
+
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+
+	window = pgctx->main_window;
+	gtk_widget_show_all(window);
+
+	perf_gtk__resize_window(window);
+	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
+
+	gtk_main();
+
+	perf_gtk__deactivate_context(&pgctx);
+}
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
new file mode 100644
index 000000000..d2dadf387
--- /dev/null
+++ b/tools/perf/ui/gtk/browser.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "gtk.h"
+#include "../evsel.h"
+#include "../sort.h"
+#include "../hist.h"
+#include "../helpline.h"
+
+#include <signal.h>
+
+void perf_gtk__signal(int sig)
+{
+	perf_gtk__exit(false);
+	psignal(sig, "perf");
+}
+
+void perf_gtk__resize_window(GtkWidget *window)
+{
+	GdkRectangle rect;
+	GdkScreen *screen;
+	int monitor;
+	int height;
+	int width;
+
+	screen = gtk_widget_get_screen(window);
+
+	monitor = gdk_screen_get_monitor_at_window(screen, window->window);
+
+	gdk_screen_get_monitor_geometry(screen, monitor, &rect);
+
+	width	= rect.width * 3 / 4;
+	height	= rect.height * 3 / 4;
+
+	gtk_window_resize(GTK_WINDOW(window), width, height);
+}
+
+const char *perf_gtk__get_percent_color(double percent)
+{
+	if (percent >= MIN_RED)
+		return "<span fgcolor='red'>";
+	if (percent >= MIN_GREEN)
+		return "<span fgcolor='dark green'>";
+	return NULL;
+}
+
+#ifdef HAVE_GTK_INFO_BAR_SUPPORT
+GtkWidget *perf_gtk__setup_info_bar(void)
+{
+	GtkWidget *info_bar;
+	GtkWidget *label;
+	GtkWidget *content_area;
+
+	info_bar = gtk_info_bar_new();
+	gtk_widget_set_no_show_all(info_bar, TRUE);
+
+	label = gtk_label_new("");
+	gtk_widget_show(label);
+
+	content_area = gtk_info_bar_get_content_area(GTK_INFO_BAR(info_bar));
+	gtk_container_add(GTK_CONTAINER(content_area), label);
+
+	gtk_info_bar_add_button(GTK_INFO_BAR(info_bar), GTK_STOCK_OK,
+				GTK_RESPONSE_OK);
+	g_signal_connect(info_bar, "response",
+			 G_CALLBACK(gtk_widget_hide), NULL);
+
+	pgctx->info_bar = info_bar;
+	pgctx->message_label = label;
+
+	return info_bar;
+}
+#endif
+
+GtkWidget *perf_gtk__setup_statusbar(void)
+{
+	GtkWidget *stbar;
+	unsigned ctxid;
+
+	stbar = gtk_statusbar_new();
+
+	ctxid = gtk_statusbar_get_context_id(GTK_STATUSBAR(stbar),
+					     "perf report");
+	pgctx->statbar = stbar;
+	pgctx->statbar_ctx_id = ctxid;
+
+	return stbar;
+}
diff --git a/tools/perf/ui/gtk/gtk.h b/tools/perf/ui/gtk/gtk.h
new file mode 100644
index 000000000..a2b497f03
--- /dev/null
+++ b/tools/perf/ui/gtk/gtk.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_GTK_H_
+#define _PERF_GTK_H_ 1
+
+#include <stdbool.h>
+
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#include <gtk/gtk.h>
+#pragma GCC diagnostic error "-Wstrict-prototypes"
+
+
+struct perf_gtk_context {
+	GtkWidget *main_window;
+	GtkWidget *notebook;
+
+#ifdef HAVE_GTK_INFO_BAR_SUPPORT
+	GtkWidget *info_bar;
+	GtkWidget *message_label;
+#endif
+	GtkWidget *statbar;
+	guint statbar_ctx_id;
+};
+
+int perf_gtk__init(void);
+void perf_gtk__exit(bool wait_for_ok);
+
+extern struct perf_gtk_context *pgctx;
+
+static inline bool perf_gtk__is_active_context(struct perf_gtk_context *ctx)
+{
+	return ctx && ctx->main_window;
+}
+
+struct perf_gtk_context *perf_gtk__activate_context(GtkWidget *window);
+int perf_gtk__deactivate_context(struct perf_gtk_context **ctx);
+
+void perf_gtk__init_helpline(void);
+void gtk_ui_progress__init(void);
+void perf_gtk__init_hpp(void);
+
+void perf_gtk__signal(int sig);
+void perf_gtk__resize_window(GtkWidget *window);
+const char *perf_gtk__get_percent_color(double percent);
+GtkWidget *perf_gtk__setup_statusbar(void);
+
+#ifdef HAVE_GTK_INFO_BAR_SUPPORT
+GtkWidget *perf_gtk__setup_info_bar(void);
+#else
+static inline GtkWidget *perf_gtk__setup_info_bar(void)
+{
+	return NULL;
+}
+#endif
+
+struct evsel;
+struct evlist;
+struct hist_entry;
+struct hist_browser_timer;
+
+int evlist__gtk_browse_hists(struct evlist *evlist, const char *help,
+			     struct hist_browser_timer *hbt, float min_pcnt);
+int hist_entry__gtk_annotate(struct hist_entry *he,
+			     struct evsel *evsel,
+			     struct hist_browser_timer *hbt);
+void perf_gtk__show_annotations(void);
+
+#endif /* _PERF_GTK_H_ */
diff --git a/tools/perf/ui/gtk/helpline.c b/tools/perf/ui/gtk/helpline.c
new file mode 100644
index 000000000..8ea95898a
--- /dev/null
+++ b/tools/perf/ui/gtk/helpline.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "gtk.h"
+#include <stdio.h>
+#include <string.h>
+#include <linux/kernel.h>
+
+#include "../ui.h"
+#include "../helpline.h"
+
+static void gtk_helpline_pop(void)
+{
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+
+	gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
+			  pgctx->statbar_ctx_id);
+}
+
+static void gtk_helpline_push(const char *msg)
+{
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+
+	gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
+			   pgctx->statbar_ctx_id, msg);
+}
+
+static int gtk_helpline_show(const char *fmt, va_list ap)
+{
+	int ret;
+	char *ptr;
+	static int backlog;
+
+	ret = vscnprintf(ui_helpline__current + backlog,
+			 sizeof(ui_helpline__current) - backlog, fmt, ap);
+	backlog += ret;
+
+	/* only first line can be displayed */
+	ptr = strchr(ui_helpline__current, '\n');
+	if (ptr && (ptr - ui_helpline__current) <= backlog) {
+		*ptr = '\0';
+		ui_helpline__puts(ui_helpline__current);
+		backlog = 0;
+	}
+
+	return ret;
+}
+
+static struct ui_helpline gtk_helpline_fns = {
+	.pop	= gtk_helpline_pop,
+	.push	= gtk_helpline_push,
+	.show	= gtk_helpline_show,
+};
+
+void perf_gtk__init_helpline(void)
+{
+	helpline_fns = &gtk_helpline_fns;
+}
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
new file mode 100644
index 000000000..bae21f336
--- /dev/null
+++ b/tools/perf/ui/gtk/hists.c
@@ -0,0 +1,681 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "gtk.h"
+#include "../evlist.h"
+#include "../callchain.h"
+#include "../evsel.h"
+#include "../sort.h"
+#include "../hist.h"
+#include "../helpline.h"
+#include "../string2.h"
+#include <signal.h>
+#include <stdlib.h>
+#include <linux/string.h>
+
+#define MAX_COLUMNS			32
+
+static int __percent_color_snprintf(struct perf_hpp *hpp, const char *fmt, ...)
+{
+	int ret = 0;
+	int len;
+	va_list args;
+	double percent;
+	const char *markup;
+	char *buf = hpp->buf;
+	size_t size = hpp->size;
+
+	va_start(args, fmt);
+	len = va_arg(args, int);
+	percent = va_arg(args, double);
+	va_end(args);
+
+	markup = perf_gtk__get_percent_color(percent);
+	if (markup)
+		ret += scnprintf(buf, size, markup);
+
+	ret += scnprintf(buf + ret, size - ret, fmt, len, percent);
+
+	if (markup)
+		ret += scnprintf(buf + ret, size - ret, "</span>");
+
+	return ret;
+}
+
+#define __HPP_COLOR_PERCENT_FN(_type, _field)					\
+static u64 he_get_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat._field;							\
+}										\
+										\
+static int perf_gtk__hpp_color_##_type(struct perf_hpp_fmt *fmt,		\
+				       struct perf_hpp *hpp,			\
+				       struct hist_entry *he)			\
+{										\
+	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%",		\
+			__percent_color_snprintf, true);			\
+}
+
+#define __HPP_COLOR_ACC_PERCENT_FN(_type, _field)				\
+static u64 he_get_acc_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat_acc->_field;						\
+}										\
+										\
+static int perf_gtk__hpp_color_##_type(struct perf_hpp_fmt *fmt,		\
+				       struct perf_hpp *hpp,			\
+				       struct hist_entry *he)			\
+{										\
+	return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%", 	\
+			    __percent_color_snprintf, true);			\
+}
+
+__HPP_COLOR_PERCENT_FN(overhead, period)
+__HPP_COLOR_PERCENT_FN(overhead_sys, period_sys)
+__HPP_COLOR_PERCENT_FN(overhead_us, period_us)
+__HPP_COLOR_PERCENT_FN(overhead_guest_sys, period_guest_sys)
+__HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us)
+__HPP_COLOR_ACC_PERCENT_FN(overhead_acc, period)
+
+#undef __HPP_COLOR_PERCENT_FN
+
+
+void perf_gtk__init_hpp(void)
+{
+	perf_hpp__format[PERF_HPP__OVERHEAD].color =
+				perf_gtk__hpp_color_overhead;
+	perf_hpp__format[PERF_HPP__OVERHEAD_SYS].color =
+				perf_gtk__hpp_color_overhead_sys;
+	perf_hpp__format[PERF_HPP__OVERHEAD_US].color =
+				perf_gtk__hpp_color_overhead_us;
+	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].color =
+				perf_gtk__hpp_color_overhead_guest_sys;
+	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].color =
+				perf_gtk__hpp_color_overhead_guest_us;
+	perf_hpp__format[PERF_HPP__OVERHEAD_ACC].color =
+				perf_gtk__hpp_color_overhead_acc;
+}
+
+static void perf_gtk__add_callchain_flat(struct rb_root *root, GtkTreeStore *store,
+					 GtkTreeIter *parent, int col, u64 total)
+{
+	struct rb_node *nd;
+	bool has_single_node = (rb_first(root) == rb_last(root));
+
+	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
+		struct callchain_node *node;
+		struct callchain_list *chain;
+		GtkTreeIter iter, new_parent;
+		bool need_new_parent;
+
+		node = rb_entry(nd, struct callchain_node, rb_node);
+
+		new_parent = *parent;
+		need_new_parent = !has_single_node;
+
+		callchain_node__make_parent_list(node);
+
+		list_for_each_entry(chain, &node->parent_val, list) {
+			char buf[128];
+
+			gtk_tree_store_append(store, &iter, &new_parent);
+
+			callchain_node__scnprintf_value(node, buf, sizeof(buf), total);
+			gtk_tree_store_set(store, &iter, 0, buf, -1);
+
+			callchain_list__sym_name(chain, buf, sizeof(buf), false);
+			gtk_tree_store_set(store, &iter, col, buf, -1);
+
+			if (need_new_parent) {
+				/*
+				 * Only show the top-most symbol in a callchain
+				 * if it's not the only callchain.
+				 */
+				new_parent = iter;
+				need_new_parent = false;
+			}
+		}
+
+		list_for_each_entry(chain, &node->val, list) {
+			char buf[128];
+
+			gtk_tree_store_append(store, &iter, &new_parent);
+
+			callchain_node__scnprintf_value(node, buf, sizeof(buf), total);
+			gtk_tree_store_set(store, &iter, 0, buf, -1);
+
+			callchain_list__sym_name(chain, buf, sizeof(buf), false);
+			gtk_tree_store_set(store, &iter, col, buf, -1);
+
+			if (need_new_parent) {
+				/*
+				 * Only show the top-most symbol in a callchain
+				 * if it's not the only callchain.
+				 */
+				new_parent = iter;
+				need_new_parent = false;
+			}
+		}
+	}
+}
+
+static void perf_gtk__add_callchain_folded(struct rb_root *root, GtkTreeStore *store,
+					   GtkTreeIter *parent, int col, u64 total)
+{
+	struct rb_node *nd;
+
+	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
+		struct callchain_node *node;
+		struct callchain_list *chain;
+		GtkTreeIter iter;
+		char buf[64];
+		char *str, *str_alloc = NULL;
+		bool first = true;
+
+		node = rb_entry(nd, struct callchain_node, rb_node);
+
+		callchain_node__make_parent_list(node);
+
+		list_for_each_entry(chain, &node->parent_val, list) {
+			char name[1024];
+
+			callchain_list__sym_name(chain, name, sizeof(name), false);
+
+			if (asprintf(&str, "%s%s%s",
+				     first ? "" : str_alloc,
+				     first ? "" : symbol_conf.field_sep ?: "; ",
+				     name) < 0)
+				return;
+
+			first = false;
+			free(str_alloc);
+			str_alloc = str;
+		}
+
+		list_for_each_entry(chain, &node->val, list) {
+			char name[1024];
+
+			callchain_list__sym_name(chain, name, sizeof(name), false);
+
+			if (asprintf(&str, "%s%s%s",
+				     first ? "" : str_alloc,
+				     first ? "" : symbol_conf.field_sep ?: "; ",
+				     name) < 0)
+				return;
+
+			first = false;
+			free(str_alloc);
+			str_alloc = str;
+		}
+
+		gtk_tree_store_append(store, &iter, parent);
+
+		callchain_node__scnprintf_value(node, buf, sizeof(buf), total);
+		gtk_tree_store_set(store, &iter, 0, buf, -1);
+
+		gtk_tree_store_set(store, &iter, col, str, -1);
+
+		free(str_alloc);
+	}
+}
+
+static void perf_gtk__add_callchain_graph(struct rb_root *root, GtkTreeStore *store,
+					  GtkTreeIter *parent, int col, u64 total)
+{
+	struct rb_node *nd;
+	bool has_single_node = (rb_first(root) == rb_last(root));
+
+	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
+		struct callchain_node *node;
+		struct callchain_list *chain;
+		GtkTreeIter iter, new_parent;
+		bool need_new_parent;
+		u64 child_total;
+
+		node = rb_entry(nd, struct callchain_node, rb_node);
+
+		new_parent = *parent;
+		need_new_parent = !has_single_node && (node->val_nr > 1);
+
+		list_for_each_entry(chain, &node->val, list) {
+			char buf[128];
+
+			gtk_tree_store_append(store, &iter, &new_parent);
+
+			callchain_node__scnprintf_value(node, buf, sizeof(buf), total);
+			gtk_tree_store_set(store, &iter, 0, buf, -1);
+
+			callchain_list__sym_name(chain, buf, sizeof(buf), false);
+			gtk_tree_store_set(store, &iter, col, buf, -1);
+
+			if (need_new_parent) {
+				/*
+				 * Only show the top-most symbol in a callchain
+				 * if it's not the only callchain.
+				 */
+				new_parent = iter;
+				need_new_parent = false;
+			}
+		}
+
+		if (callchain_param.mode == CHAIN_GRAPH_REL)
+			child_total = node->children_hit;
+		else
+			child_total = total;
+
+		/* Now 'iter' contains info of the last callchain_list */
+		perf_gtk__add_callchain_graph(&node->rb_root, store, &iter, col,
+					      child_total);
+	}
+}
+
+static void perf_gtk__add_callchain(struct rb_root *root, GtkTreeStore *store,
+				    GtkTreeIter *parent, int col, u64 total)
+{
+	if (callchain_param.mode == CHAIN_FLAT)
+		perf_gtk__add_callchain_flat(root, store, parent, col, total);
+	else if (callchain_param.mode == CHAIN_FOLDED)
+		perf_gtk__add_callchain_folded(root, store, parent, col, total);
+	else
+		perf_gtk__add_callchain_graph(root, store, parent, col, total);
+}
+
+static void on_row_activated(GtkTreeView *view, GtkTreePath *path,
+			     GtkTreeViewColumn *col __maybe_unused,
+			     gpointer user_data __maybe_unused)
+{
+	bool expanded = gtk_tree_view_row_expanded(view, path);
+
+	if (expanded)
+		gtk_tree_view_collapse_row(view, path);
+	else
+		gtk_tree_view_expand_row(view, path, FALSE);
+}
+
+static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
+				 float min_pcnt)
+{
+	struct perf_hpp_fmt *fmt;
+	GType col_types[MAX_COLUMNS];
+	GtkCellRenderer *renderer;
+	GtkTreeStore *store;
+	struct rb_node *nd;
+	GtkWidget *view;
+	int col_idx;
+	int sym_col = -1;
+	int nr_cols;
+	char s[512];
+
+	struct perf_hpp hpp = {
+		.buf		= s,
+		.size		= sizeof(s),
+	};
+
+	nr_cols = 0;
+
+	hists__for_each_format(hists, fmt)
+		col_types[nr_cols++] = G_TYPE_STRING;
+
+	store = gtk_tree_store_newv(nr_cols, col_types);
+
+	view = gtk_tree_view_new();
+
+	renderer = gtk_cell_renderer_text_new();
+
+	col_idx = 0;
+
+	hists__for_each_format(hists, fmt) {
+		if (perf_hpp__should_skip(fmt, hists))
+			continue;
+
+		/*
+		 * XXX no way to determine where symcol column is..
+		 *     Just use last column for now.
+		 */
+		if (perf_hpp__is_sort_entry(fmt))
+			sym_col = col_idx;
+
+		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
+							    -1, fmt->name,
+							    renderer, "markup",
+							    col_idx++, NULL);
+	}
+
+	for (col_idx = 0; col_idx < nr_cols; col_idx++) {
+		GtkTreeViewColumn *column;
+
+		column = gtk_tree_view_get_column(GTK_TREE_VIEW(view), col_idx);
+		gtk_tree_view_column_set_resizable(column, TRUE);
+
+		if (col_idx == sym_col) {
+			gtk_tree_view_set_expander_column(GTK_TREE_VIEW(view),
+							  column);
+		}
+	}
+
+	gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));
+
+	g_object_unref(GTK_TREE_MODEL(store));
+
+	for (nd = rb_first_cached(&hists->entries); nd; nd = rb_next(nd)) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+		GtkTreeIter iter;
+		u64 total = hists__total_period(h->hists);
+		float percent;
+
+		if (h->filtered)
+			continue;
+
+		percent = hist_entry__get_percent_limit(h);
+		if (percent < min_pcnt)
+			continue;
+
+		gtk_tree_store_append(store, &iter, NULL);
+
+		col_idx = 0;
+
+		hists__for_each_format(hists, fmt) {
+			if (perf_hpp__should_skip(fmt, h->hists))
+				continue;
+
+			if (fmt->color)
+				fmt->color(fmt, &hpp, h);
+			else
+				fmt->entry(fmt, &hpp, h);
+
+			gtk_tree_store_set(store, &iter, col_idx++, s, -1);
+		}
+
+		if (hist_entry__has_callchains(h) &&
+		    symbol_conf.use_callchain && hists__has(hists, sym)) {
+			if (callchain_param.mode == CHAIN_GRAPH_REL)
+				total = symbol_conf.cumulate_callchain ?
+					h->stat_acc->period : h->stat.period;
+
+			perf_gtk__add_callchain(&h->sorted_chain, store, &iter,
+						sym_col, total);
+		}
+	}
+
+	gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(view), TRUE);
+
+	g_signal_connect(view, "row-activated",
+			 G_CALLBACK(on_row_activated), NULL);
+	gtk_container_add(GTK_CONTAINER(window), view);
+}
+
+static void perf_gtk__add_hierarchy_entries(struct hists *hists,
+					    struct rb_root_cached *root,
+					    GtkTreeStore *store,
+					    GtkTreeIter *parent,
+					    struct perf_hpp *hpp,
+					    float min_pcnt)
+{
+	int col_idx = 0;
+	struct rb_node *node;
+	struct hist_entry *he;
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	u64 total = hists__total_period(hists);
+	int size;
+
+	for (node = rb_first_cached(root); node; node = rb_next(node)) {
+		GtkTreeIter iter;
+		float percent;
+		char *bf;
+
+		he = rb_entry(node, struct hist_entry, rb_node);
+		if (he->filtered)
+			continue;
+
+		percent = hist_entry__get_percent_limit(he);
+		if (percent < min_pcnt)
+			continue;
+
+		gtk_tree_store_append(store, &iter, parent);
+
+		col_idx = 0;
+
+		/* the first hpp_list_node is for overhead columns */
+		fmt_node = list_first_entry(&hists->hpp_formats,
+					    struct perf_hpp_list_node, list);
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+			if (fmt->color)
+				fmt->color(fmt, hpp, he);
+			else
+				fmt->entry(fmt, hpp, he);
+
+			gtk_tree_store_set(store, &iter, col_idx++, hpp->buf, -1);
+		}
+
+		bf = hpp->buf;
+		size = hpp->size;
+		perf_hpp_list__for_each_format(he->hpp_list, fmt) {
+			int ret;
+
+			if (fmt->color)
+				ret = fmt->color(fmt, hpp, he);
+			else
+				ret = fmt->entry(fmt, hpp, he);
+
+			snprintf(hpp->buf + ret, hpp->size - ret, "  ");
+			advance_hpp(hpp, ret + 2);
+		}
+
+		gtk_tree_store_set(store, &iter, col_idx, strim(bf), -1);
+
+		if (!he->leaf) {
+			hpp->buf = bf;
+			hpp->size = size;
+
+			perf_gtk__add_hierarchy_entries(hists, &he->hroot_out,
+							store, &iter, hpp,
+							min_pcnt);
+
+			if (!hist_entry__has_hierarchy_children(he, min_pcnt)) {
+				char buf[32];
+				GtkTreeIter child;
+
+				snprintf(buf, sizeof(buf), "no entry >= %.2f%%",
+					 min_pcnt);
+
+				gtk_tree_store_append(store, &child, &iter);
+				gtk_tree_store_set(store, &child, col_idx, buf, -1);
+			}
+		}
+
+		if (he->leaf && hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
+			if (callchain_param.mode == CHAIN_GRAPH_REL)
+				total = symbol_conf.cumulate_callchain ?
+					he->stat_acc->period : he->stat.period;
+
+			perf_gtk__add_callchain(&he->sorted_chain, store, &iter,
+						col_idx, total);
+		}
+	}
+
+}
+
+static void perf_gtk__show_hierarchy(GtkWidget *window, struct hists *hists,
+				     float min_pcnt)
+{
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	GType col_types[MAX_COLUMNS];
+	GtkCellRenderer *renderer;
+	GtkTreeStore *store;
+	GtkWidget *view;
+	int col_idx;
+	int nr_cols = 0;
+	char s[512];
+	char buf[512];
+	bool first_node, first_col;
+	struct perf_hpp hpp = {
+		.buf		= s,
+		.size		= sizeof(s),
+	};
+
+	hists__for_each_format(hists, fmt) {
+		if (perf_hpp__is_sort_entry(fmt) ||
+		    perf_hpp__is_dynamic_entry(fmt))
+			break;
+
+		col_types[nr_cols++] = G_TYPE_STRING;
+	}
+	col_types[nr_cols++] = G_TYPE_STRING;
+
+	store = gtk_tree_store_newv(nr_cols, col_types);
+	view = gtk_tree_view_new();
+	renderer = gtk_cell_renderer_text_new();
+
+	col_idx = 0;
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
+							    -1, fmt->name,
+							    renderer, "markup",
+							    col_idx++, NULL);
+	}
+
+	/* construct merged column header since sort keys share single column */
+	buf[0] = '\0';
+	first_node = true;
+	list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
+		if (!first_node)
+			strcat(buf, " / ");
+		first_node = false;
+
+		first_col = true;
+		perf_hpp_list__for_each_format(&fmt_node->hpp ,fmt) {
+			if (perf_hpp__should_skip(fmt, hists))
+				continue;
+
+			if (!first_col)
+				strcat(buf, "+");
+			first_col = false;
+
+			fmt->header(fmt, &hpp, hists, 0, NULL);
+			strcat(buf, strim(hpp.buf));
+		}
+	}
+
+	gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
+						    -1, buf,
+						    renderer, "markup",
+						    col_idx++, NULL);
+
+	for (col_idx = 0; col_idx < nr_cols; col_idx++) {
+		GtkTreeViewColumn *column;
+
+		column = gtk_tree_view_get_column(GTK_TREE_VIEW(view), col_idx);
+		gtk_tree_view_column_set_resizable(column, TRUE);
+
+		if (col_idx == 0) {
+			gtk_tree_view_set_expander_column(GTK_TREE_VIEW(view),
+							  column);
+		}
+	}
+
+	gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));
+	g_object_unref(GTK_TREE_MODEL(store));
+
+	perf_gtk__add_hierarchy_entries(hists, &hists->entries, store,
+					NULL, &hpp, min_pcnt);
+
+	gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(view), TRUE);
+
+	g_signal_connect(view, "row-activated",
+			 G_CALLBACK(on_row_activated), NULL);
+	gtk_container_add(GTK_CONTAINER(window), view);
+}
+
+int evlist__gtk_browse_hists(struct evlist *evlist, const char *help,
+			     struct hist_browser_timer *hbt __maybe_unused, float min_pcnt)
+{
+	struct evsel *pos;
+	GtkWidget *vbox;
+	GtkWidget *notebook;
+	GtkWidget *info_bar;
+	GtkWidget *statbar;
+	GtkWidget *window;
+
+	signal(SIGSEGV, perf_gtk__signal);
+	signal(SIGFPE,  perf_gtk__signal);
+	signal(SIGINT,  perf_gtk__signal);
+	signal(SIGQUIT, perf_gtk__signal);
+	signal(SIGTERM, perf_gtk__signal);
+
+	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+
+	gtk_window_set_title(GTK_WINDOW(window), "perf report");
+
+	g_signal_connect(window, "delete_event", gtk_main_quit, NULL);
+
+	pgctx = perf_gtk__activate_context(window);
+	if (!pgctx)
+		return -1;
+
+	vbox = gtk_vbox_new(FALSE, 0);
+
+	notebook = gtk_notebook_new();
+
+	gtk_box_pack_start(GTK_BOX(vbox), notebook, TRUE, TRUE, 0);
+
+	info_bar = perf_gtk__setup_info_bar();
+	if (info_bar)
+		gtk_box_pack_start(GTK_BOX(vbox), info_bar, FALSE, FALSE, 0);
+
+	statbar = perf_gtk__setup_statusbar();
+	gtk_box_pack_start(GTK_BOX(vbox), statbar, FALSE, FALSE, 0);
+
+	gtk_container_add(GTK_CONTAINER(window), vbox);
+
+	evlist__for_each_entry(evlist, pos) {
+		struct hists *hists = evsel__hists(pos);
+		const char *evname = evsel__name(pos);
+		GtkWidget *scrolled_window;
+		GtkWidget *tab_label;
+		char buf[512];
+		size_t size = sizeof(buf);
+
+		if (symbol_conf.event_group) {
+			if (!evsel__is_group_leader(pos))
+				continue;
+
+			if (pos->core.nr_members > 1) {
+				evsel__group_desc(pos, buf, size);
+				evname = buf;
+			}
+		}
+
+		scrolled_window = gtk_scrolled_window_new(NULL, NULL);
+
+		gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
+							GTK_POLICY_AUTOMATIC,
+							GTK_POLICY_AUTOMATIC);
+
+		if (symbol_conf.report_hierarchy)
+			perf_gtk__show_hierarchy(scrolled_window, hists, min_pcnt);
+		else
+			perf_gtk__show_hists(scrolled_window, hists, min_pcnt);
+
+		tab_label = gtk_label_new(evname);
+
+		gtk_notebook_append_page(GTK_NOTEBOOK(notebook), scrolled_window, tab_label);
+	}
+
+	gtk_widget_show_all(window);
+
+	perf_gtk__resize_window(window);
+
+	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
+
+	ui_helpline__push(help);
+
+	gtk_main();
+
+	perf_gtk__deactivate_context(&pgctx);
+
+	return 0;
+}
diff --git a/tools/perf/ui/gtk/progress.c b/tools/perf/ui/gtk/progress.c
new file mode 100644
index 000000000..eea6fcde5
--- /dev/null
+++ b/tools/perf/ui/gtk/progress.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <inttypes.h>
+
+#include "gtk.h"
+#include "../progress.h"
+
+static GtkWidget *dialog;
+static GtkWidget *progress;
+
+static void gtk_ui_progress__update(struct ui_progress *p)
+{
+	double fraction = p->total ? 1.0 * p->curr / p->total : 0.0;
+	char buf[1024];
+
+	if (dialog == NULL) {
+		GtkWidget *vbox = gtk_vbox_new(TRUE, 5);
+		GtkWidget *label = gtk_label_new(p->title);
+
+		dialog = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+		progress = gtk_progress_bar_new();
+
+		gtk_box_pack_start(GTK_BOX(vbox), label, TRUE, FALSE, 3);
+		gtk_box_pack_start(GTK_BOX(vbox), progress, TRUE, TRUE, 3);
+
+		gtk_container_add(GTK_CONTAINER(dialog), vbox);
+
+		gtk_window_set_title(GTK_WINDOW(dialog), "perf");
+		gtk_window_resize(GTK_WINDOW(dialog), 300, 80);
+		gtk_window_set_position(GTK_WINDOW(dialog), GTK_WIN_POS_CENTER);
+
+		gtk_widget_show_all(dialog);
+	}
+
+	gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress), fraction);
+	snprintf(buf, sizeof(buf), "%"PRIu64" / %"PRIu64, p->curr, p->total);
+	gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), buf);
+
+	/* we didn't call gtk_main yet, so do it manually */
+	while (gtk_events_pending())
+		gtk_main_iteration();
+}
+
+static void gtk_ui_progress__finish(void)
+{
+	/* this will also destroy all of its children */
+	gtk_widget_destroy(dialog);
+
+	dialog = NULL;
+}
+
+static struct ui_progress_ops gtk_ui_progress__ops = {
+	.update		= gtk_ui_progress__update,
+	.finish		= gtk_ui_progress__finish,
+};
+
+void gtk_ui_progress__init(void)
+{
+	ui_progress__ops = &gtk_ui_progress__ops;
+}
diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
new file mode 100644
index 000000000..f5eee4d66
--- /dev/null
+++ b/tools/perf/ui/gtk/setup.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "gtk.h"
+#include <linux/compiler.h>
+#include "../util.h"
+
+extern struct perf_error_ops perf_gtk_eops;
+
+int perf_gtk__init(void)
+{
+	perf_error__register(&perf_gtk_eops);
+	perf_gtk__init_helpline();
+	gtk_ui_progress__init();
+	perf_gtk__init_hpp();
+
+	return gtk_init_check(NULL, NULL) ? 0 : -1;
+}
+
+void perf_gtk__exit(bool wait_for_ok __maybe_unused)
+{
+	if (!perf_gtk__is_active_context(pgctx))
+		return;
+	perf_error__unregister(&perf_gtk_eops);
+	gtk_main_quit();
+}
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
new file mode 100644
index 000000000..c47f5c387
--- /dev/null
+++ b/tools/perf/ui/gtk/util.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../util.h"
+#include "gtk.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <linux/zalloc.h>
+
+struct perf_gtk_context *pgctx;
+
+struct perf_gtk_context *perf_gtk__activate_context(GtkWidget *window)
+{
+	struct perf_gtk_context *ctx;
+
+	ctx = malloc(sizeof(*pgctx));
+	if (ctx)
+		ctx->main_window = window;
+
+	return ctx;
+}
+
+int perf_gtk__deactivate_context(struct perf_gtk_context **ctx)
+{
+	if (!perf_gtk__is_active_context(*ctx))
+		return -1;
+
+	zfree(ctx);
+	return 0;
+}
+
+static int perf_gtk__error(const char *format, va_list args)
+{
+	char *msg;
+	GtkWidget *dialog;
+
+	if (!perf_gtk__is_active_context(pgctx) ||
+	    vasprintf(&msg, format, args) < 0) {
+		fprintf(stderr, "Error:\n");
+		vfprintf(stderr, format, args);
+		fprintf(stderr, "\n");
+		return -1;
+	}
+
+	dialog = gtk_message_dialog_new_with_markup(GTK_WINDOW(pgctx->main_window),
+					GTK_DIALOG_DESTROY_WITH_PARENT,
+					GTK_MESSAGE_ERROR,
+					GTK_BUTTONS_CLOSE,
+					"<b>Error</b>\n\n%s", msg);
+	gtk_dialog_run(GTK_DIALOG(dialog));
+
+	gtk_widget_destroy(dialog);
+	free(msg);
+	return 0;
+}
+
+#ifdef HAVE_GTK_INFO_BAR_SUPPORT
+static int perf_gtk__warning_info_bar(const char *format, va_list args)
+{
+	char *msg;
+
+	if (!perf_gtk__is_active_context(pgctx) ||
+	    vasprintf(&msg, format, args) < 0) {
+		fprintf(stderr, "Warning:\n");
+		vfprintf(stderr, format, args);
+		fprintf(stderr, "\n");
+		return -1;
+	}
+
+	gtk_label_set_text(GTK_LABEL(pgctx->message_label), msg);
+	gtk_info_bar_set_message_type(GTK_INFO_BAR(pgctx->info_bar),
+				      GTK_MESSAGE_WARNING);
+	gtk_widget_show(pgctx->info_bar);
+
+	free(msg);
+	return 0;
+}
+#else
+static int perf_gtk__warning_statusbar(const char *format, va_list args)
+{
+	char *msg, *p;
+
+	if (!perf_gtk__is_active_context(pgctx) ||
+	    vasprintf(&msg, format, args) < 0) {
+		fprintf(stderr, "Warning:\n");
+		vfprintf(stderr, format, args);
+		fprintf(stderr, "\n");
+		return -1;
+	}
+
+	gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
+			  pgctx->statbar_ctx_id);
+
+	/* Only first line can be displayed */
+	p = strchr(msg, '\n');
+	if (p)
+		*p = '\0';
+
+	gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
+			   pgctx->statbar_ctx_id, msg);
+
+	free(msg);
+	return 0;
+}
+#endif
+
+struct perf_error_ops perf_gtk_eops = {
+	.error		= perf_gtk__error,
+#ifdef HAVE_GTK_INFO_BAR_SUPPORT
+	.warning	= perf_gtk__warning_info_bar,
+#else
+	.warning	= perf_gtk__warning_statusbar,
+#endif
+};
diff --git a/tools/perf/ui/helpline.c b/tools/perf/ui/helpline.c
new file mode 100644
index 000000000..911182b3f
--- /dev/null
+++ b/tools/perf/ui/helpline.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "helpline.h"
+#include "ui.h"
+
+char ui_helpline__current[512];
+
+static void nop_helpline__pop(void)
+{
+}
+
+static void nop_helpline__push(const char *msg __maybe_unused)
+{
+}
+
+static int nop_helpline__show(const char *fmt __maybe_unused,
+			       va_list ap __maybe_unused)
+{
+	return 0;
+}
+
+static struct ui_helpline default_helpline_fns = {
+	.pop	= nop_helpline__pop,
+	.push	= nop_helpline__push,
+	.show	= nop_helpline__show,
+};
+
+struct ui_helpline *helpline_fns = &default_helpline_fns;
+
+void ui_helpline__pop(void)
+{
+	helpline_fns->pop();
+}
+
+void ui_helpline__push(const char *msg)
+{
+	helpline_fns->push(msg);
+}
+
+void ui_helpline__vpush(const char *fmt, va_list ap)
+{
+	char *s;
+
+	if (vasprintf(&s, fmt, ap) < 0)
+		vfprintf(stderr, fmt, ap);
+	else {
+		ui_helpline__push(s);
+		free(s);
+	}
+}
+
+void ui_helpline__fpush(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	ui_helpline__vpush(fmt, ap);
+	va_end(ap);
+}
+
+void ui_helpline__puts(const char *msg)
+{
+	ui_helpline__pop();
+	ui_helpline__push(msg);
+}
+
+int ui_helpline__vshow(const char *fmt, va_list ap)
+{
+	return helpline_fns->show(fmt, ap);
+}
+
+void ui_helpline__printf(const char *fmt, ...)
+{
+	va_list ap;
+
+	ui_helpline__pop();
+	va_start(ap, fmt);
+	ui_helpline__vpush(fmt, ap);
+	va_end(ap);
+}
diff --git a/tools/perf/ui/helpline.h b/tools/perf/ui/helpline.h
new file mode 100644
index 000000000..2165a098d
--- /dev/null
+++ b/tools/perf/ui/helpline.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_HELPLINE_H_
+#define _PERF_UI_HELPLINE_H_ 1
+
+#include <stdio.h>
+#include <stdarg.h>
+
+struct ui_helpline {
+	void (*pop)(void);
+	void (*push)(const char *msg);
+	int  (*show)(const char *fmt, va_list ap);
+};
+
+extern struct ui_helpline *helpline_fns;
+
+void ui_helpline__init(void);
+
+void ui_helpline__pop(void);
+void ui_helpline__push(const char *msg);
+void ui_helpline__vpush(const char *fmt, va_list ap);
+void ui_helpline__fpush(const char *fmt, ...);
+void ui_helpline__puts(const char *msg);
+void ui_helpline__printf(const char *fmt, ...);
+int  ui_helpline__vshow(const char *fmt, va_list ap);
+
+extern char ui_helpline__current[512];
+extern char ui_helpline__last_msg[];
+
+#endif /* _PERF_UI_HELPLINE_H_ */
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
new file mode 100644
index 000000000..e58327595
--- /dev/null
+++ b/tools/perf/ui/hist.c
@@ -0,0 +1,1273 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <inttypes.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/compiler.h>
+
+#include "../util/callchain.h"
+#include "../util/debug.h"
+#include "../util/hist.h"
+#include "../util/sort.h"
+#include "../util/evsel.h"
+#include "../util/evlist.h"
+#include "../util/mem-events.h"
+#include "../util/string2.h"
+#include "../util/thread.h"
+#include "../util/util.h"
+
+/* hist period print (hpp) functions */
+
+#define hpp__call_print_fn(hpp, fn, fmt, ...)			\
+({								\
+	int __ret = fn(hpp, fmt, ##__VA_ARGS__);		\
+	advance_hpp(hpp, __ret);				\
+	__ret;							\
+})
+
+static int __hpp__fmt_print(struct perf_hpp *hpp, struct hists *hists, u64 val,
+			    int nr_samples, const char *fmt, int len,
+			    hpp_snprint_fn print_fn, enum perf_hpp_fmt_type fmtype)
+{
+	if (fmtype == PERF_HPP_FMT_TYPE__PERCENT || fmtype == PERF_HPP_FMT_TYPE__LATENCY) {
+		double percent = 0.0;
+		u64 total = fmtype == PERF_HPP_FMT_TYPE__PERCENT ? hists__total_period(hists) :
+			hists__total_latency(hists);
+
+		if (total)
+			percent = 100.0 * val / total;
+
+		return hpp__call_print_fn(hpp, print_fn, fmt, len, percent);
+	}
+
+	if (fmtype == PERF_HPP_FMT_TYPE__AVERAGE) {
+		double avg = nr_samples ? (1.0 * val / nr_samples) : 0;
+
+		return hpp__call_print_fn(hpp, print_fn, fmt, len, avg);
+	}
+
+	return hpp__call_print_fn(hpp, print_fn, fmt, len, val);
+}
+
+struct hpp_fmt_value {
+	struct hists *hists;
+	u64 val;
+	int samples;
+};
+
+static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
+		      hpp_field_fn get_field, const char *fmt, int len,
+		      hpp_snprint_fn print_fn, enum perf_hpp_fmt_type fmtype)
+{
+	int ret = 0;
+	struct hists *hists = he->hists;
+	struct evsel *evsel = hists_to_evsel(hists);
+	struct evsel *pos;
+	char *buf = hpp->buf;
+	size_t size = hpp->size;
+	int i = 0, nr_members = 1;
+	struct hpp_fmt_value *values;
+
+	if (evsel__is_group_event(evsel))
+		nr_members = evsel->core.nr_members;
+
+	values = calloc(nr_members, sizeof(*values));
+	if (values == NULL)
+		return 0;
+
+	values[0].hists = evsel__hists(evsel);
+	values[0].val = get_field(he);
+	values[0].samples = he->stat.nr_events;
+
+	if (evsel__is_group_event(evsel)) {
+		struct hist_entry *pair;
+
+		for_each_group_member(pos, evsel)
+			values[++i].hists = evsel__hists(pos);
+
+		list_for_each_entry(pair, &he->pairs.head, pairs.node) {
+			for (i = 0; i < nr_members; i++) {
+				if (values[i].hists != pair->hists)
+					continue;
+
+				values[i].val = get_field(pair);
+				values[i].samples = pair->stat.nr_events;
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < nr_members; i++) {
+		if (symbol_conf.skip_empty &&
+		    values[i].hists->stats.nr_samples == 0)
+			continue;
+
+		ret += __hpp__fmt_print(hpp, values[i].hists, values[i].val,
+					values[i].samples, fmt, len,
+					print_fn, fmtype);
+	}
+
+	free(values);
+
+	/*
+	 * Restore original buf and size as it's where caller expects
+	 * the result will be saved.
+	 */
+	hpp->buf = buf;
+	hpp->size = size;
+
+	return ret;
+}
+
+int hpp__fmt(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+	     struct hist_entry *he, hpp_field_fn get_field,
+	     const char *fmtstr, hpp_snprint_fn print_fn,
+	     enum perf_hpp_fmt_type fmtype)
+{
+	int len = max(fmt->user_len ?: fmt->len, (int)strlen(fmt->name));
+
+	if (symbol_conf.field_sep) {
+		return __hpp__fmt(hpp, he, get_field, fmtstr, 1,
+				  print_fn, fmtype);
+	}
+
+	if (fmtype == PERF_HPP_FMT_TYPE__PERCENT || fmtype == PERF_HPP_FMT_TYPE__LATENCY)
+		len -= 2; /* 2 for a space and a % sign */
+	else
+		len -= 1;
+
+	return  __hpp__fmt(hpp, he, get_field, fmtstr, len, print_fn, fmtype);
+}
+
+int hpp__fmt_acc(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		 struct hist_entry *he, hpp_field_fn get_field,
+		 const char *fmtstr, hpp_snprint_fn print_fn,
+		 enum perf_hpp_fmt_type fmtype)
+{
+	if (!symbol_conf.cumulate_callchain) {
+		int len = fmt->user_len ?: fmt->len;
+		return snprintf(hpp->buf, hpp->size, " %*s", len - 1, "N/A");
+	}
+
+	return hpp__fmt(fmt, hpp, he, get_field, fmtstr, print_fn, fmtype);
+}
+
+int hpp__fmt_mem_stat(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+		      struct hist_entry *he, enum mem_stat_type mst,
+		      const char *fmtstr, hpp_snprint_fn print_fn)
+{
+	struct hists *hists = he->hists;
+	int mem_stat_idx = -1;
+	char *buf = hpp->buf;
+	size_t size = hpp->size;
+	u64 total = 0;
+	int ret = 0;
+
+	for (int i = 0; i < hists->nr_mem_stats; i++) {
+		if (hists->mem_stat_types[i] == mst) {
+			mem_stat_idx = i;
+			break;
+		}
+	}
+	assert(mem_stat_idx != -1);
+
+	for (int i = 0; i < MEM_STAT_LEN; i++)
+		total += hists->mem_stat_total[mem_stat_idx].entries[i];
+	assert(total != 0);
+
+	for (int i = 0; i < MEM_STAT_LEN; i++) {
+		u64 val = he->mem_stat[mem_stat_idx].entries[i];
+
+		if (hists->mem_stat_total[mem_stat_idx].entries[i] == 0)
+			continue;
+
+		ret += hpp__call_print_fn(hpp, print_fn, fmtstr, 100.0 * val / total);
+	}
+
+	/*
+	 * Restore original buf and size as it's where caller expects
+	 * the result will be saved.
+	 */
+	hpp->buf = buf;
+	hpp->size = size;
+
+	return ret;
+}
+
+static int field_cmp(u64 field_a, u64 field_b)
+{
+	if (field_a > field_b)
+		return 1;
+	if (field_a < field_b)
+		return -1;
+	return 0;
+}
+
+static int hist_entry__new_pair(struct hist_entry *a, struct hist_entry *b,
+				hpp_field_fn get_field, int nr_members,
+				u64 **fields_a, u64 **fields_b)
+{
+	u64 *fa = calloc(nr_members, sizeof(*fa)),
+	    *fb = calloc(nr_members, sizeof(*fb));
+	struct hist_entry *pair;
+
+	if (!fa || !fb)
+		goto out_free;
+
+	list_for_each_entry(pair, &a->pairs.head, pairs.node) {
+		struct evsel *evsel = hists_to_evsel(pair->hists);
+		fa[evsel__group_idx(evsel)] = get_field(pair);
+	}
+
+	list_for_each_entry(pair, &b->pairs.head, pairs.node) {
+		struct evsel *evsel = hists_to_evsel(pair->hists);
+		fb[evsel__group_idx(evsel)] = get_field(pair);
+	}
+
+	*fields_a = fa;
+	*fields_b = fb;
+	return 0;
+out_free:
+	free(fa);
+	free(fb);
+	*fields_a = *fields_b = NULL;
+	return -1;
+}
+
+static int __hpp__group_sort_idx(struct hist_entry *a, struct hist_entry *b,
+				 hpp_field_fn get_field, int idx)
+{
+	struct evsel *evsel = hists_to_evsel(a->hists);
+	u64 *fields_a, *fields_b;
+	int cmp, nr_members, ret, i;
+
+	cmp = field_cmp(get_field(a), get_field(b));
+	if (!evsel__is_group_event(evsel))
+		return cmp;
+
+	nr_members = evsel->core.nr_members;
+	if (idx < 1 || idx >= nr_members)
+		return cmp;
+
+	ret = hist_entry__new_pair(a, b, get_field, nr_members, &fields_a, &fields_b);
+	if (ret) {
+		ret = cmp;
+		goto out;
+	}
+
+	ret = field_cmp(fields_a[idx], fields_b[idx]);
+	if (ret)
+		goto out;
+
+	for (i = 1; i < nr_members; i++) {
+		if (i != idx) {
+			ret = field_cmp(fields_a[i], fields_b[i]);
+			if (ret)
+				goto out;
+		}
+	}
+
+out:
+	free(fields_a);
+	free(fields_b);
+
+	return ret;
+}
+
+static int __hpp__sort(struct hist_entry *a, struct hist_entry *b,
+		       hpp_field_fn get_field)
+{
+	s64 ret;
+	int i, nr_members;
+	struct evsel *evsel;
+	u64 *fields_a, *fields_b;
+
+	if (symbol_conf.group_sort_idx && symbol_conf.event_group) {
+		return __hpp__group_sort_idx(a, b, get_field,
+					     symbol_conf.group_sort_idx);
+	}
+
+	ret = field_cmp(get_field(a), get_field(b));
+	if (ret || !symbol_conf.event_group)
+		return ret;
+
+	evsel = hists_to_evsel(a->hists);
+	if (!evsel__is_group_event(evsel))
+		return ret;
+
+	nr_members = evsel->core.nr_members;
+	i = hist_entry__new_pair(a, b, get_field, nr_members, &fields_a, &fields_b);
+	if (i)
+		goto out;
+
+	for (i = 1; i < nr_members; i++) {
+		ret = field_cmp(fields_a[i], fields_b[i]);
+		if (ret)
+			break;
+	}
+
+out:
+	free(fields_a);
+	free(fields_b);
+
+	return ret;
+}
+
+static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
+			   hpp_field_fn get_field)
+{
+	s64 ret = 0;
+
+	if (symbol_conf.cumulate_callchain) {
+		/*
+		 * Put caller above callee when they have equal period.
+		 */
+		ret = field_cmp(get_field(a), get_field(b));
+		if (ret)
+			return ret;
+
+		if ((a->thread == NULL ? NULL : RC_CHK_ACCESS(a->thread)) !=
+		    (b->thread == NULL ? NULL : RC_CHK_ACCESS(b->thread)) ||
+		    !hist_entry__has_callchains(a) || !symbol_conf.use_callchain)
+			return 0;
+
+		ret = b->callchain->max_depth - a->callchain->max_depth;
+		if (callchain_param.order == ORDER_CALLER)
+			ret = -ret;
+	}
+	return ret;
+}
+
+static bool perf_hpp__is_mem_stat_entry(struct perf_hpp_fmt *fmt);
+
+static enum mem_stat_type hpp__mem_stat_type(struct perf_hpp_fmt *fmt)
+{
+	if (!perf_hpp__is_mem_stat_entry(fmt))
+		return -1;
+
+	switch (fmt->idx) {
+	case PERF_HPP__MEM_STAT_OP:
+		return PERF_MEM_STAT_OP;
+	case PERF_HPP__MEM_STAT_CACHE:
+		return PERF_MEM_STAT_CACHE;
+	case PERF_HPP__MEM_STAT_MEMORY:
+		return PERF_MEM_STAT_MEMORY;
+	case PERF_HPP__MEM_STAT_SNOOP:
+		return PERF_MEM_STAT_SNOOP;
+	case PERF_HPP__MEM_STAT_DTLB:
+		return PERF_MEM_STAT_DTLB;
+	default:
+		break;
+	}
+	pr_debug("Should not reach here\n");
+	return -1;
+}
+
+static int64_t hpp__sort_mem_stat(struct perf_hpp_fmt *fmt __maybe_unused,
+				  struct hist_entry *a, struct hist_entry *b)
+{
+	return a->stat.period - b->stat.period;
+}
+
+static int hpp__width_fn(struct perf_hpp_fmt *fmt,
+			 struct perf_hpp *hpp __maybe_unused,
+			 struct hists *hists)
+{
+	int len = fmt->user_len ?: fmt->len;
+	struct evsel *evsel = hists_to_evsel(hists);
+
+	if (symbol_conf.event_group) {
+		int nr = 0;
+		struct evsel *pos;
+
+		for_each_group_evsel(pos, evsel) {
+			if (!symbol_conf.skip_empty ||
+			    evsel__hists(pos)->stats.nr_samples)
+				nr++;
+		}
+
+		len = max(len, nr * fmt->len);
+	}
+
+	if (len < (int)strlen(fmt->name))
+		len = strlen(fmt->name);
+
+	return len;
+}
+
+static int hpp__header_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+			  struct hists *hists, int line,
+			  int *span __maybe_unused)
+{
+	int len = hpp__width_fn(fmt, hpp, hists);
+	const char *hdr = "";
+
+	if (line == hists->hpp_list->nr_header_lines - 1)
+		hdr = fmt->name;
+
+	return scnprintf(hpp->buf, hpp->size, "%*s", len, hdr);
+}
+
+static int hpp__header_mem_stat_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+				   struct hists *hists, int line,
+				   int *span __maybe_unused)
+{
+	char *buf = hpp->buf;
+	int ret = 0;
+	int len;
+	enum mem_stat_type mst = hpp__mem_stat_type(fmt);
+	int mem_stat_idx = -1;
+
+	for (int i = 0; i < hists->nr_mem_stats; i++) {
+		if (hists->mem_stat_types[i] == mst) {
+			mem_stat_idx = i;
+			break;
+		}
+	}
+	assert(mem_stat_idx != -1);
+
+	if (line == 0) {
+		int left, right;
+
+		len = 0;
+		/* update fmt->len for acutally used columns only */
+		for (int i = 0; i < MEM_STAT_LEN; i++) {
+			if (hists->mem_stat_total[mem_stat_idx].entries[i])
+				len += MEM_STAT_PRINT_LEN;
+		}
+		fmt->len = len;
+
+		/* print header directly if single column only */
+		if (len == MEM_STAT_PRINT_LEN)
+			return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
+
+		left = (len - strlen(fmt->name)) / 2 - 1;
+		right = len - left - strlen(fmt->name) - 2;
+
+		if (left < 0)
+			left = 0;
+		if (right < 0)
+			right = 0;
+
+		return scnprintf(hpp->buf, hpp->size, "%.*s %s %.*s",
+				 left, graph_dotted_line, fmt->name, right, graph_dotted_line);
+	}
+
+
+	len = hpp->size;
+	for (int i = 0; i < MEM_STAT_LEN; i++) {
+		int printed;
+
+		if (hists->mem_stat_total[mem_stat_idx].entries[i] == 0)
+			continue;
+
+		printed = scnprintf(buf, len, "%*s", MEM_STAT_PRINT_LEN,
+				    mem_stat_name(mst, i));
+		ret += printed;
+		buf += printed;
+		len -= printed;
+	}
+	return ret;
+}
+
+int hpp_color_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
+{
+	va_list args;
+	ssize_t ssize = hpp->size;
+	double percent;
+	int ret, len;
+
+	va_start(args, fmt);
+	len = va_arg(args, int);
+	percent = va_arg(args, double);
+	ret = percent_color_len_snprintf(hpp->buf, hpp->size, fmt, len, percent);
+	va_end(args);
+
+	return (ret >= ssize) ? (ssize - 1) : ret;
+}
+
+static int hpp_entry_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
+{
+	va_list args;
+	ssize_t ssize = hpp->size;
+	int ret;
+
+	va_start(args, fmt);
+	ret = vsnprintf(hpp->buf, hpp->size, fmt, args);
+	va_end(args);
+
+	return (ret >= ssize) ? (ssize - 1) : ret;
+}
+
+#define __HPP_COLOR_PERCENT_FN(_type, _field, _fmttype)				\
+static u64 he_get_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat._field;							\
+}										\
+										\
+static int hpp__color_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%",		\
+			hpp_color_scnprintf, _fmttype);				\
+}
+
+#define __HPP_ENTRY_PERCENT_FN(_type, _field, _fmttype)				\
+static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%",		\
+			hpp_entry_scnprintf, _fmttype);	\
+}
+
+#define __HPP_SORT_FN(_type, _field)						\
+static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
+				 struct hist_entry *a, struct hist_entry *b) 	\
+{										\
+	return __hpp__sort(a, b, he_get_##_field);				\
+}
+
+#define __HPP_COLOR_ACC_PERCENT_FN(_type, _field, _fmttype)			\
+static u64 he_get_acc_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat_acc->_field;						\
+}										\
+										\
+static int hpp__color_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%", 	\
+			    hpp_color_scnprintf, _fmttype);			\
+}
+
+#define __HPP_ENTRY_ACC_PERCENT_FN(_type, _field, _fmttype)			\
+static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%",	\
+			    hpp_entry_scnprintf, _fmttype);			\
+}
+
+#define __HPP_SORT_ACC_FN(_type, _field)					\
+static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
+				 struct hist_entry *a, struct hist_entry *b) 	\
+{										\
+	return __hpp__sort_acc(a, b, he_get_acc_##_field);			\
+}
+
+#define __HPP_ENTRY_RAW_FN(_type, _field)					\
+static u64 he_get_raw_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat._field;							\
+}										\
+										\
+static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt(fmt, hpp, he, he_get_raw_##_field, " %*"PRIu64, 	\
+			hpp_entry_scnprintf, PERF_HPP_FMT_TYPE__RAW);		\
+}
+
+#define __HPP_SORT_RAW_FN(_type, _field)					\
+static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
+				 struct hist_entry *a, struct hist_entry *b) 	\
+{										\
+	return __hpp__sort(a, b, he_get_raw_##_field);				\
+}
+
+#define __HPP_ENTRY_AVERAGE_FN(_type, _field)					\
+static u64 he_get_##_field(struct hist_entry *he)				\
+{										\
+	return he->stat._field;							\
+}										\
+										\
+static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
+			      struct perf_hpp *hpp, struct hist_entry *he) 	\
+{										\
+	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.1f",		\
+			hpp_entry_scnprintf, PERF_HPP_FMT_TYPE__AVERAGE);	\
+}
+
+#define __HPP_SORT_AVERAGE_FN(_type, _field)					\
+static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
+				 struct hist_entry *a, struct hist_entry *b) 	\
+{										\
+	return __hpp__sort(a, b, he_get_##_field);				\
+}
+
+#define __HPP_COLOR_MEM_STAT_FN(_name, _type)					\
+static int hpp__color_mem_stat_##_name(struct perf_hpp_fmt *fmt,		\
+				       struct perf_hpp *hpp,			\
+				       struct hist_entry *he)			\
+{										\
+	return hpp__fmt_mem_stat(fmt, hpp, he, PERF_MEM_STAT_##_type,		\
+				 " %5.1f%%", hpp_color_scnprintf);		\
+}
+
+#define __HPP_ENTRY_MEM_STAT_FN(_name, _type)					\
+static int hpp__entry_mem_stat_##_name(struct perf_hpp_fmt *fmt, 		\
+				       struct perf_hpp *hpp,			\
+				       struct hist_entry *he)			\
+{										\
+	return hpp__fmt_mem_stat(fmt, hpp, he, PERF_MEM_STAT_##_type,		\
+				 " %5.1f%%", hpp_entry_scnprintf);		\
+}
+
+#define HPP_PERCENT_FNS(_type, _field, _fmttype)			\
+__HPP_COLOR_PERCENT_FN(_type, _field, _fmttype)				\
+__HPP_ENTRY_PERCENT_FN(_type, _field, _fmttype)				\
+__HPP_SORT_FN(_type, _field)
+
+#define HPP_PERCENT_ACC_FNS(_type, _field, _fmttype)			\
+__HPP_COLOR_ACC_PERCENT_FN(_type, _field, _fmttype)			\
+__HPP_ENTRY_ACC_PERCENT_FN(_type, _field, _fmttype)			\
+__HPP_SORT_ACC_FN(_type, _field)
+
+#define HPP_RAW_FNS(_type, _field)					\
+__HPP_ENTRY_RAW_FN(_type, _field)					\
+__HPP_SORT_RAW_FN(_type, _field)
+
+#define HPP_AVERAGE_FNS(_type, _field)					\
+__HPP_ENTRY_AVERAGE_FN(_type, _field)					\
+__HPP_SORT_AVERAGE_FN(_type, _field)
+
+#define HPP_MEM_STAT_FNS(_name, _type)					\
+__HPP_COLOR_MEM_STAT_FN(_name, _type)					\
+__HPP_ENTRY_MEM_STAT_FN(_name, _type)
+
+HPP_PERCENT_FNS(overhead, period, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_FNS(latency, latency, PERF_HPP_FMT_TYPE__LATENCY)
+HPP_PERCENT_FNS(overhead_sys, period_sys, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_FNS(overhead_us, period_us, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_FNS(overhead_guest_sys, period_guest_sys, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_FNS(overhead_guest_us, period_guest_us, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_ACC_FNS(overhead_acc, period, PERF_HPP_FMT_TYPE__PERCENT)
+HPP_PERCENT_ACC_FNS(latency_acc, latency, PERF_HPP_FMT_TYPE__LATENCY)
+
+HPP_RAW_FNS(samples, nr_events)
+HPP_RAW_FNS(period, period)
+
+HPP_AVERAGE_FNS(weight1, weight1)
+HPP_AVERAGE_FNS(weight2, weight2)
+HPP_AVERAGE_FNS(weight3, weight3)
+
+HPP_MEM_STAT_FNS(op, OP)
+HPP_MEM_STAT_FNS(cache, CACHE)
+HPP_MEM_STAT_FNS(memory, MEMORY)
+HPP_MEM_STAT_FNS(snoop, SNOOP)
+HPP_MEM_STAT_FNS(dtlb, DTLB)
+
+static int64_t hpp__nop_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
+			    struct hist_entry *a __maybe_unused,
+			    struct hist_entry *b __maybe_unused)
+{
+	return 0;
+}
+
+static bool perf_hpp__is_mem_stat_entry(struct perf_hpp_fmt *fmt)
+{
+	return fmt->sort == hpp__sort_mem_stat;
+}
+
+static bool perf_hpp__is_hpp_entry(struct perf_hpp_fmt *a)
+{
+	return a->header == hpp__header_fn;
+}
+
+static bool hpp__equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
+{
+	if (!perf_hpp__is_hpp_entry(a) || !perf_hpp__is_hpp_entry(b))
+		return false;
+
+	return a->idx == b->idx;
+}
+
+static bool hpp__equal_mem_stat(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
+{
+	if (!perf_hpp__is_mem_stat_entry(a) || !perf_hpp__is_mem_stat_entry(b))
+		return false;
+
+	return a->entry == b->entry;
+}
+
+#define HPP__COLOR_PRINT_FNS(_name, _fn, _idx)		\
+	{						\
+		.name   = _name,			\
+		.header	= hpp__header_fn,		\
+		.width	= hpp__width_fn,		\
+		.color	= hpp__color_ ## _fn,		\
+		.entry	= hpp__entry_ ## _fn,		\
+		.cmp	= hpp__nop_cmp,			\
+		.collapse = hpp__nop_cmp,		\
+		.sort	= hpp__sort_ ## _fn,		\
+		.idx	= PERF_HPP__ ## _idx,		\
+		.equal	= hpp__equal,			\
+	}
+
+#define HPP__COLOR_ACC_PRINT_FNS(_name, _fn, _idx)	\
+	{						\
+		.name   = _name,			\
+		.header	= hpp__header_fn,		\
+		.width	= hpp__width_fn,		\
+		.color	= hpp__color_ ## _fn,		\
+		.entry	= hpp__entry_ ## _fn,		\
+		.cmp	= hpp__nop_cmp,			\
+		.collapse = hpp__nop_cmp,		\
+		.sort	= hpp__sort_ ## _fn,		\
+		.idx	= PERF_HPP__ ## _idx,		\
+		.equal	= hpp__equal,			\
+	}
+
+#define HPP__PRINT_FNS(_name, _fn, _idx)		\
+	{						\
+		.name   = _name,			\
+		.header	= hpp__header_fn,		\
+		.width	= hpp__width_fn,		\
+		.entry	= hpp__entry_ ## _fn,		\
+		.cmp	= hpp__nop_cmp,			\
+		.collapse = hpp__nop_cmp,		\
+		.sort	= hpp__sort_ ## _fn,		\
+		.idx	= PERF_HPP__ ## _idx,		\
+		.equal	= hpp__equal,			\
+	}
+
+#define HPP__MEM_STAT_PRINT_FNS(_name, _fn, _type)	\
+	{						\
+		.name   = _name,			\
+		.header	= hpp__header_mem_stat_fn,	\
+		.width	= hpp__width_fn,		\
+		.color	= hpp__color_mem_stat_ ## _fn,	\
+		.entry	= hpp__entry_mem_stat_ ## _fn,	\
+		.cmp	= hpp__nop_cmp,			\
+		.collapse = hpp__nop_cmp,		\
+		.sort	= hpp__sort_mem_stat,		\
+		.idx	= PERF_HPP__MEM_STAT_ ## _type,	\
+		.equal	= hpp__equal_mem_stat,		\
+	}
+
+struct perf_hpp_fmt perf_hpp__format[] = {
+	HPP__COLOR_PRINT_FNS("Overhead", overhead, OVERHEAD),
+	HPP__COLOR_PRINT_FNS("Latency", latency, LATENCY),
+	HPP__COLOR_PRINT_FNS("sys", overhead_sys, OVERHEAD_SYS),
+	HPP__COLOR_PRINT_FNS("usr", overhead_us, OVERHEAD_US),
+	HPP__COLOR_PRINT_FNS("guest sys", overhead_guest_sys, OVERHEAD_GUEST_SYS),
+	HPP__COLOR_PRINT_FNS("guest usr", overhead_guest_us, OVERHEAD_GUEST_US),
+	HPP__COLOR_ACC_PRINT_FNS("Children", overhead_acc, OVERHEAD_ACC),
+	HPP__COLOR_ACC_PRINT_FNS("Latency", latency_acc, LATENCY_ACC),
+	HPP__PRINT_FNS("Samples", samples, SAMPLES),
+	HPP__PRINT_FNS("Period", period, PERIOD),
+	HPP__PRINT_FNS("Weight1", weight1, WEIGHT1),
+	HPP__PRINT_FNS("Weight2", weight2, WEIGHT2),
+	HPP__PRINT_FNS("Weight3", weight3, WEIGHT3),
+	HPP__MEM_STAT_PRINT_FNS("Mem Op", op, OP),
+	HPP__MEM_STAT_PRINT_FNS("Cache", cache, CACHE),
+	HPP__MEM_STAT_PRINT_FNS("Memory", memory, MEMORY),
+	HPP__MEM_STAT_PRINT_FNS("Snoop", snoop, SNOOP),
+	HPP__MEM_STAT_PRINT_FNS("D-TLB", dtlb, DTLB),
+};
+
+struct perf_hpp_list perf_hpp_list = {
+	.fields	= LIST_HEAD_INIT(perf_hpp_list.fields),
+	.sorts	= LIST_HEAD_INIT(perf_hpp_list.sorts),
+	.nr_header_lines = 1,
+};
+
+#undef HPP__COLOR_PRINT_FNS
+#undef HPP__COLOR_ACC_PRINT_FNS
+#undef HPP__PRINT_FNS
+#undef HPP__MEM_STAT_PRINT_FNS
+
+#undef HPP_PERCENT_FNS
+#undef HPP_PERCENT_ACC_FNS
+#undef HPP_RAW_FNS
+#undef HPP_AVERAGE_FNS
+#undef HPP_MEM_STAT_FNS
+
+#undef __HPP_HEADER_FN
+#undef __HPP_WIDTH_FN
+#undef __HPP_COLOR_PERCENT_FN
+#undef __HPP_ENTRY_PERCENT_FN
+#undef __HPP_COLOR_ACC_PERCENT_FN
+#undef __HPP_ENTRY_ACC_PERCENT_FN
+#undef __HPP_ENTRY_RAW_FN
+#undef __HPP_ENTRY_AVERAGE_FN
+#undef __HPP_COLOR_MEM_STAT_FN
+#undef __HPP_ENTRY_MEM_STAT_FN
+
+#undef __HPP_SORT_FN
+#undef __HPP_SORT_ACC_FN
+#undef __HPP_SORT_RAW_FN
+#undef __HPP_SORT_AVERAGE_FN
+
+static void fmt_free(struct perf_hpp_fmt *fmt)
+{
+	/*
+	 * At this point fmt should be completely
+	 * unhooked, if not it's a bug.
+	 */
+	BUG_ON(!list_empty(&fmt->list));
+	BUG_ON(!list_empty(&fmt->sort_list));
+
+	if (fmt->free)
+		fmt->free(fmt);
+}
+
+static bool fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
+{
+	return a->equal && a->equal(a, b);
+}
+
+void perf_hpp__init(void)
+{
+	int i;
+
+	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+		struct perf_hpp_fmt *fmt = &perf_hpp__format[i];
+
+		INIT_LIST_HEAD(&fmt->list);
+
+		/* sort_list may be linked by setup_sorting() */
+		if (fmt->sort_list.next == NULL)
+			INIT_LIST_HEAD(&fmt->sort_list);
+	}
+
+	/*
+	 * If user specified field order, no need to setup default fields.
+	 */
+	if (is_strict_order(field_order))
+		return;
+
+	/*
+	 * Overhead and latency columns are added in setup_overhead(),
+	 * so they are added implicitly here only if they were added
+	 * by setup_overhead() before (have was_taken flag set).
+	 * This is required because setup_overhead() has more complex
+	 * logic, in particular it does not add "overhead" if user
+	 * specified "latency" in sort order, and vise versa.
+	 */
+	if (symbol_conf.cumulate_callchain) {
+		/*
+		 * Addition of fields is idempotent, so we add latency
+		 * column twice to get desired order with simpler logic.
+		 */
+		if (symbol_conf.prefer_latency)
+			hpp_dimension__add_output(PERF_HPP__LATENCY_ACC, true);
+		hpp_dimension__add_output(PERF_HPP__OVERHEAD_ACC, true);
+		if (symbol_conf.enable_latency)
+			hpp_dimension__add_output(PERF_HPP__LATENCY_ACC, true);
+		perf_hpp__format[PERF_HPP__OVERHEAD].name = "Self";
+	}
+
+	if (symbol_conf.prefer_latency)
+		hpp_dimension__add_output(PERF_HPP__LATENCY, true);
+	hpp_dimension__add_output(PERF_HPP__OVERHEAD, true);
+	if (symbol_conf.enable_latency)
+		hpp_dimension__add_output(PERF_HPP__LATENCY, true);
+
+	if (symbol_conf.show_cpu_utilization) {
+		hpp_dimension__add_output(PERF_HPP__OVERHEAD_SYS, false);
+		hpp_dimension__add_output(PERF_HPP__OVERHEAD_US, false);
+
+		if (perf_guest) {
+			hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_SYS, false);
+			hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_US, false);
+		}
+	}
+
+	if (symbol_conf.show_nr_samples)
+		hpp_dimension__add_output(PERF_HPP__SAMPLES, false);
+
+	if (symbol_conf.show_total_period)
+		hpp_dimension__add_output(PERF_HPP__PERIOD, false);
+}
+
+void perf_hpp_list__column_register(struct perf_hpp_list *list,
+				    struct perf_hpp_fmt *format)
+{
+	list_add_tail(&format->list, &list->fields);
+}
+
+void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
+					struct perf_hpp_fmt *format)
+{
+	list_add_tail(&format->sort_list, &list->sorts);
+}
+
+void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list,
+				       struct perf_hpp_fmt *format)
+{
+	list_add(&format->sort_list, &list->sorts);
+}
+
+static void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
+{
+	list_del_init(&format->list);
+	list_del_init(&format->sort_list);
+	fmt_free(format);
+}
+
+void perf_hpp__cancel_cumulate(struct evlist *evlist)
+{
+	struct perf_hpp_fmt *fmt, *acc, *ovh, *acc_lat, *tmp;
+	struct evsel *evsel;
+
+	if (is_strict_order(field_order))
+		return;
+
+	ovh = &perf_hpp__format[PERF_HPP__OVERHEAD];
+	acc = &perf_hpp__format[PERF_HPP__OVERHEAD_ACC];
+	acc_lat = &perf_hpp__format[PERF_HPP__LATENCY_ACC];
+
+	perf_hpp_list__for_each_format_safe(&perf_hpp_list, fmt, tmp) {
+		if (fmt_equal(acc, fmt) || fmt_equal(acc_lat, fmt)) {
+			perf_hpp__column_unregister(fmt);
+			continue;
+		}
+
+		if (fmt_equal(ovh, fmt))
+			fmt->name = "Overhead";
+	}
+
+	evlist__for_each_entry(evlist, evsel) {
+		struct hists *hists = evsel__hists(evsel);
+		struct perf_hpp_list_node *node;
+
+		list_for_each_entry(node, &hists->hpp_formats, list) {
+			perf_hpp_list__for_each_format_safe(&node->hpp, fmt, tmp) {
+				if (fmt_equal(acc, fmt) || fmt_equal(acc_lat, fmt)) {
+					perf_hpp__column_unregister(fmt);
+					continue;
+				}
+
+				if (fmt_equal(ovh, fmt))
+					fmt->name = "Overhead";
+			}
+		}
+	}
+}
+
+void perf_hpp__cancel_latency(struct evlist *evlist)
+{
+	struct perf_hpp_fmt *fmt, *lat, *acc, *tmp;
+	struct evsel *evsel;
+
+	if (is_strict_order(field_order))
+		return;
+	if (sort_order && strstr(sort_order, "latency"))
+		return;
+
+	lat = &perf_hpp__format[PERF_HPP__LATENCY];
+	acc = &perf_hpp__format[PERF_HPP__LATENCY_ACC];
+
+	perf_hpp_list__for_each_format_safe(&perf_hpp_list, fmt, tmp) {
+		if (fmt_equal(lat, fmt) || fmt_equal(acc, fmt))
+			perf_hpp__column_unregister(fmt);
+	}
+
+	evlist__for_each_entry(evlist, evsel) {
+		struct hists *hists = evsel__hists(evsel);
+		struct perf_hpp_list_node *node;
+
+		list_for_each_entry(node, &hists->hpp_formats, list) {
+			perf_hpp_list__for_each_format_safe(&node->hpp, fmt, tmp) {
+				if (fmt_equal(lat, fmt) || fmt_equal(acc, fmt))
+					perf_hpp__column_unregister(fmt);
+			}
+		}
+	}
+}
+
+void perf_hpp__setup_output_field(struct perf_hpp_list *list)
+{
+	struct perf_hpp_fmt *fmt;
+
+	/* append sort keys to output field */
+	perf_hpp_list__for_each_sort_list(list, fmt) {
+		struct perf_hpp_fmt *pos;
+
+		/* skip sort-only fields ("sort_compute" in perf diff) */
+		if (!fmt->entry && !fmt->color)
+			continue;
+
+		perf_hpp_list__for_each_format(list, pos) {
+			if (fmt_equal(fmt, pos))
+				goto next;
+		}
+
+		perf_hpp__column_register(fmt);
+next:
+		continue;
+	}
+}
+
+void perf_hpp__append_sort_keys(struct perf_hpp_list *list)
+{
+	struct perf_hpp_fmt *fmt;
+
+	/* append output fields to sort keys */
+	perf_hpp_list__for_each_format(list, fmt) {
+		struct perf_hpp_fmt *pos;
+
+		perf_hpp_list__for_each_sort_list(list, pos) {
+			if (fmt_equal(fmt, pos))
+				goto next;
+		}
+
+		perf_hpp__register_sort_field(fmt);
+next:
+		continue;
+	}
+}
+
+
+void perf_hpp__reset_output_field(struct perf_hpp_list *list)
+{
+	struct perf_hpp_fmt *fmt, *tmp;
+
+	/* reset output fields */
+	perf_hpp_list__for_each_format_safe(list, fmt, tmp)
+		perf_hpp__column_unregister(fmt);
+
+	/* reset sort keys */
+	perf_hpp_list__for_each_sort_list_safe(list, fmt, tmp)
+		perf_hpp__column_unregister(fmt);
+}
+
+/*
+ * See hists__fprintf to match the column widths
+ */
+unsigned int hists__sort_list_width(struct hists *hists)
+{
+	struct perf_hpp_fmt *fmt;
+	int ret = 0;
+	bool first = true;
+	struct perf_hpp dummy_hpp;
+
+	hists__for_each_format(hists, fmt) {
+		if (perf_hpp__should_skip(fmt, hists))
+			continue;
+
+		if (first)
+			first = false;
+		else
+			ret += 2;
+
+		ret += fmt->width(fmt, &dummy_hpp, hists);
+	}
+
+	if (verbose > 0 && hists__has(hists, sym)) /* Addr + origin */
+		ret += 3 + BITS_PER_LONG / 4;
+
+	return ret;
+}
+
+unsigned int hists__overhead_width(struct hists *hists)
+{
+	struct perf_hpp_fmt *fmt;
+	int ret = 0;
+	bool first = true;
+	struct perf_hpp dummy_hpp;
+
+	hists__for_each_format(hists, fmt) {
+		if (perf_hpp__is_sort_entry(fmt) || perf_hpp__is_dynamic_entry(fmt))
+			break;
+
+		if (first)
+			first = false;
+		else
+			ret += 2;
+
+		ret += fmt->width(fmt, &dummy_hpp, hists);
+	}
+
+	return ret;
+}
+
+void perf_hpp__reset_width(struct perf_hpp_fmt *fmt, struct hists *hists)
+{
+	if (perf_hpp__is_sort_entry(fmt))
+		return perf_hpp__reset_sort_width(fmt, hists);
+
+	if (perf_hpp__is_dynamic_entry(fmt))
+		return;
+
+	BUG_ON(fmt->idx >= PERF_HPP__MAX_INDEX);
+
+	switch (fmt->idx) {
+	case PERF_HPP__OVERHEAD:
+	case PERF_HPP__LATENCY:
+	case PERF_HPP__OVERHEAD_SYS:
+	case PERF_HPP__OVERHEAD_US:
+	case PERF_HPP__OVERHEAD_ACC:
+		fmt->len = 8;
+		break;
+
+	case PERF_HPP__OVERHEAD_GUEST_SYS:
+	case PERF_HPP__OVERHEAD_GUEST_US:
+		fmt->len = 9;
+		break;
+
+	case PERF_HPP__SAMPLES:
+	case PERF_HPP__PERIOD:
+		fmt->len = 12;
+		break;
+
+	case PERF_HPP__WEIGHT1:
+	case PERF_HPP__WEIGHT2:
+	case PERF_HPP__WEIGHT3:
+		fmt->len = 8;
+		break;
+
+	case PERF_HPP__MEM_STAT_OP:
+	case PERF_HPP__MEM_STAT_CACHE:
+	case PERF_HPP__MEM_STAT_MEMORY:
+	case PERF_HPP__MEM_STAT_SNOOP:
+	case PERF_HPP__MEM_STAT_DTLB:
+		fmt->len = MEM_STAT_LEN * MEM_STAT_PRINT_LEN;
+		break;
+
+	default:
+		break;
+	}
+}
+
+void hists__reset_column_width(struct hists *hists)
+{
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *node;
+
+	hists__for_each_format(hists, fmt)
+		perf_hpp__reset_width(fmt, hists);
+
+	/* hierarchy entries have their own hpp list */
+	list_for_each_entry(node, &hists->hpp_formats, list) {
+		perf_hpp_list__for_each_format(&node->hpp, fmt)
+			perf_hpp__reset_width(fmt, hists);
+	}
+}
+
+void perf_hpp__set_user_width(const char *width_list_str)
+{
+	struct perf_hpp_fmt *fmt;
+	const char *ptr = width_list_str;
+
+	perf_hpp_list__for_each_format(&perf_hpp_list, fmt) {
+		char *p;
+
+		int len = strtol(ptr, &p, 10);
+		fmt->user_len = len;
+
+		if (*p == ',')
+			ptr = p + 1;
+		else
+			break;
+	}
+}
+
+static int add_hierarchy_fmt(struct hists *hists, struct perf_hpp_fmt *fmt)
+{
+	struct perf_hpp_list_node *node = NULL;
+	struct perf_hpp_fmt *fmt_copy;
+	bool found = false;
+	bool skip = perf_hpp__should_skip(fmt, hists);
+
+	list_for_each_entry(node, &hists->hpp_formats, list) {
+		if (node->level == fmt->level) {
+			found = true;
+			break;
+		}
+	}
+
+	if (!found) {
+		node = malloc(sizeof(*node));
+		if (node == NULL)
+			return -1;
+
+		node->skip = skip;
+		node->level = fmt->level;
+		perf_hpp_list__init(&node->hpp);
+
+		hists->nr_hpp_node++;
+		list_add_tail(&node->list, &hists->hpp_formats);
+	}
+
+	fmt_copy = perf_hpp_fmt__dup(fmt);
+	if (fmt_copy == NULL)
+		return -1;
+
+	if (!skip)
+		node->skip = false;
+
+	list_add_tail(&fmt_copy->list, &node->hpp.fields);
+	list_add_tail(&fmt_copy->sort_list, &node->hpp.sorts);
+
+	return 0;
+}
+
+int perf_hpp__setup_hists_formats(struct perf_hpp_list *list,
+				  struct evlist *evlist)
+{
+	struct evsel *evsel;
+	struct perf_hpp_fmt *fmt;
+	struct hists *hists;
+	int ret;
+
+	if (!symbol_conf.report_hierarchy)
+		return 0;
+
+	evlist__for_each_entry(evlist, evsel) {
+		hists = evsel__hists(evsel);
+
+		perf_hpp_list__for_each_sort_list(list, fmt) {
+			if (perf_hpp__is_dynamic_entry(fmt) &&
+			    !perf_hpp__defined_dynamic_entry(fmt, hists))
+				continue;
+
+			ret = add_hierarchy_fmt(hists, fmt);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
+int perf_hpp__alloc_mem_stats(struct perf_hpp_list *list, struct evlist *evlist)
+{
+	struct perf_hpp_fmt *fmt;
+	struct evsel *evsel;
+	enum mem_stat_type mst[16];
+	unsigned nr_mem_stats = 0;
+
+	perf_hpp_list__for_each_format(list, fmt) {
+		if (!perf_hpp__is_mem_stat_entry(fmt))
+			continue;
+
+		assert(nr_mem_stats < ARRAY_SIZE(mst));
+		mst[nr_mem_stats++] = hpp__mem_stat_type(fmt);
+	}
+
+	if (nr_mem_stats == 0)
+		return 0;
+
+	list->nr_header_lines = 2;
+
+	evlist__for_each_entry(evlist, evsel) {
+		struct hists *hists = evsel__hists(evsel);
+
+		hists->mem_stat_types = calloc(nr_mem_stats,
+					       sizeof(*hists->mem_stat_types));
+		if (hists->mem_stat_types == NULL)
+			return -ENOMEM;
+
+		hists->mem_stat_total = calloc(nr_mem_stats,
+					       sizeof(*hists->mem_stat_total));
+		if (hists->mem_stat_total == NULL)
+			return -ENOMEM;
+
+		memcpy(hists->mem_stat_types, mst, nr_mem_stats * sizeof(*mst));
+		hists->nr_mem_stats = nr_mem_stats;
+	}
+	return 0;
+}
diff --git a/tools/perf/ui/keysyms.c b/tools/perf/ui/keysyms.c
new file mode 100644
index 000000000..b64564b07
--- /dev/null
+++ b/tools/perf/ui/keysyms.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include "keysyms.h"
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+
+const char *key_name(int key, char *bf, size_t size)
+{
+	if (isprint(key)) {
+		scnprintf(bf, size, "%c", key); 
+	} else if (key < 32) {
+		scnprintf(bf, size, "Ctrl+%c", key + '@'); 
+	} else {
+		const char *name = NULL;
+
+		switch (key) {
+		case K_DOWN:	name = "Down";	    break;
+		case K_END:	name = "End";	    break;
+		case K_ENTER:	name = "Enter";	    break;
+		case K_ESC:	name = "ESC";	    break;
+		case K_F1:	name = "F1";	    break;
+		case K_HOME:	name = "Home";	    break;
+		case K_LEFT:	name = "Left";	    break;
+		case K_PGDN:	name = "PgDown";    break;
+		case K_PGUP:	name = "PgUp";	    break;
+		case K_RIGHT:	name = "Right";	    break;
+		case K_TAB:	name = "Tab";	    break;
+		case K_UNTAB:	name = "Untab";	    break;
+		case K_UP:	name = "Up";	    break;
+		case K_BKSPC:	name = "Backspace"; break;
+		case K_DEL:	name = "Del";	    break;
+		default:
+			if (key >= SL_KEY_F(1) && key <= SL_KEY_F(63))
+				scnprintf(bf, size, "F%d", key - SL_KEY_F(0));
+			else
+				scnprintf(bf, size, "Unknown (%d)", key);
+		}
+
+		if (name)
+			scnprintf(bf, size, "%s", name);
+	}
+
+	return bf;
+}
diff --git a/tools/perf/ui/keysyms.h b/tools/perf/ui/keysyms.h
new file mode 100644
index 000000000..969060edc
--- /dev/null
+++ b/tools/perf/ui/keysyms.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_KEYSYMS_H_
+#define _PERF_KEYSYMS_H_ 1
+
+#include "libslang.h"
+
+#define K_DOWN	SL_KEY_DOWN
+#define K_END	SL_KEY_END
+#define K_ENTER	'\r'
+#define K_ESC	033
+#define K_F1	SL_KEY_F(1)
+#define K_HOME	SL_KEY_HOME
+#define K_LEFT	SL_KEY_LEFT
+#define K_PGDN	SL_KEY_NPAGE
+#define K_PGUP	SL_KEY_PPAGE
+#define K_RIGHT	SL_KEY_RIGHT
+#define K_TAB	'\t'
+#define K_UNTAB	SL_KEY_UNTAB
+#define K_UP	SL_KEY_UP
+#define K_BKSPC 0x7f
+#define K_DEL	SL_KEY_DELETE
+
+/* Not really keys */
+#define K_TIMER	 -1
+#define K_ERROR	 -2
+#define K_RESIZE -3
+#define K_SWITCH_INPUT_DATA -4
+#define K_RELOAD -5
+
+const char *key_name(int key, char *bf, size_t size);
+
+#endif /* _PERF_KEYSYMS_H_ */
diff --git a/tools/perf/ui/libslang.h b/tools/perf/ui/libslang.h
new file mode 100644
index 000000000..6722561e0
--- /dev/null
+++ b/tools/perf/ui/libslang.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_SLANG_H_
+#define _PERF_UI_SLANG_H_ 1
+/*
+ * slang versions <= 2.0.6 have a "#if HAVE_LONG_LONG" that breaks
+ * the build if it isn't defined. Use the equivalent one that glibc
+ * has on features.h.
+ */
+#include <features.h>
+#ifndef HAVE_LONG_LONG
+#define HAVE_LONG_LONG __GLIBC_HAVE_LONG_LONG
+#endif
+
+/* Enable future slang's corrected function prototypes. */
+#define ENABLE_SLFUTURE_CONST 1
+#define ENABLE_SLFUTURE_VOID 1
+
+#include <slang.h>
+
+#define SL_KEY_UNTAB 0x1000
+
+#endif /* _PERF_UI_SLANG_H_ */
diff --git a/tools/perf/ui/progress.c b/tools/perf/ui/progress.c
new file mode 100644
index 000000000..99d60223c
--- /dev/null
+++ b/tools/perf/ui/progress.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include "progress.h"
+
+static void null_progress__update(struct ui_progress *p __maybe_unused)
+{
+}
+
+static struct ui_progress_ops null_progress__ops =
+{
+	.update = null_progress__update,
+};
+
+struct ui_progress_ops *ui_progress__ops = &null_progress__ops;
+
+void ui_progress__update(struct ui_progress *p, u64 adv)
+{
+	u64 last = p->curr;
+
+	p->curr += adv;
+
+	if (p->curr >= p->next) {
+		u64 nr = DIV_ROUND_UP(p->curr - last, p->step);
+
+		p->next += nr * p->step;
+		ui_progress__ops->update(p);
+	}
+}
+
+void __ui_progress__init(struct ui_progress *p, u64 total,
+			 const char *title, bool size)
+{
+	p->curr = 0;
+	p->next = p->step = total / 16 ?: 1;
+	p->total = total;
+	p->title = title;
+	p->size  = size;
+
+	if (ui_progress__ops->init)
+		ui_progress__ops->init(p);
+}
+
+void ui_progress__finish(void)
+{
+	if (ui_progress__ops->finish)
+		ui_progress__ops->finish();
+}
diff --git a/tools/perf/ui/progress.h b/tools/perf/ui/progress.h
new file mode 100644
index 000000000..4f52c37b2
--- /dev/null
+++ b/tools/perf/ui/progress.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_PROGRESS_H_
+#define _PERF_UI_PROGRESS_H_ 1
+
+#include <linux/types.h>
+
+void ui_progress__finish(void);
+
+struct ui_progress {
+	const char *title;
+	u64 curr, next, step, total;
+	bool size;
+};
+
+void __ui_progress__init(struct ui_progress *p, u64 total,
+			 const char *title, bool size);
+
+#define ui_progress__init(p, total, title) \
+	__ui_progress__init(p, total, title, false)
+
+#define ui_progress__init_size(p, total, title) \
+	__ui_progress__init(p, total, title, true)
+
+void ui_progress__update(struct ui_progress *p, u64 adv);
+
+struct ui_progress_ops {
+	void (*init)(struct ui_progress *p);
+	void (*update)(struct ui_progress *p);
+	void (*finish)(void);
+};
+
+extern struct ui_progress_ops *ui_progress__ops;
+
+#endif
diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
new file mode 100644
index 000000000..ff800047e
--- /dev/null
+++ b/tools/perf/ui/setup.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <dlfcn.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include <subcmd/pager.h>
+#include "../util/debug.h"
+#include "../util/hist.h"
+#include "ui.h"
+
+struct mutex ui__lock;
+void *perf_gtk_handle;
+int use_browser = -1;
+
+#define PERF_GTK_DSO "libperf-gtk.so"
+
+#ifdef HAVE_GTK2_SUPPORT
+
+static int setup_gtk_browser(void)
+{
+	int (*perf_ui_init)(void);
+
+	if (perf_gtk_handle)
+		return 0;
+
+	perf_gtk_handle = dlopen(PERF_GTK_DSO, RTLD_LAZY);
+	if (perf_gtk_handle == NULL) {
+		char buf[PATH_MAX];
+		scnprintf(buf, sizeof(buf), "%s/%s", LIBDIR, PERF_GTK_DSO);
+		perf_gtk_handle = dlopen(buf, RTLD_LAZY);
+	}
+	if (perf_gtk_handle == NULL)
+		return -1;
+
+	perf_ui_init = dlsym(perf_gtk_handle, "perf_gtk__init");
+	if (perf_ui_init == NULL)
+		goto out_close;
+
+	if (perf_ui_init() == 0)
+		return 0;
+
+out_close:
+	dlclose(perf_gtk_handle);
+	return -1;
+}
+
+static void exit_gtk_browser(bool wait_for_ok)
+{
+	void (*perf_ui_exit)(bool);
+
+	if (perf_gtk_handle == NULL)
+		return;
+
+	perf_ui_exit = dlsym(perf_gtk_handle, "perf_gtk__exit");
+	if (perf_ui_exit == NULL)
+		goto out_close;
+
+	perf_ui_exit(wait_for_ok);
+
+out_close:
+	dlclose(perf_gtk_handle);
+
+	perf_gtk_handle = NULL;
+}
+#else
+static inline int setup_gtk_browser(void) { return -1; }
+static inline void exit_gtk_browser(bool wait_for_ok __maybe_unused) {}
+#endif
+
+int stdio__config_color(const struct option *opt __maybe_unused,
+			const char *mode, int unset __maybe_unused)
+{
+	perf_use_color_default = perf_config_colorbool("color.ui", mode, -1);
+	return 0;
+}
+
+void setup_browser(bool fallback_to_pager)
+{
+	mutex_init(&ui__lock);
+	if (use_browser < 2 && (!isatty(1) || dump_trace))
+		use_browser = 0;
+
+	/* default to TUI */
+	if (use_browser < 0)
+		use_browser = 1;
+
+	switch (use_browser) {
+	case 2:
+		if (setup_gtk_browser() == 0)
+			break;
+		printf("GTK browser requested but could not find %s\n",
+		       PERF_GTK_DSO);
+		sleep(1);
+		use_browser = 1;
+		/* fall through */
+	case 1:
+		if (ui__init() == 0)
+			break;
+		/* fall through */
+	default:
+		use_browser = 0;
+		if (fallback_to_pager)
+			setup_pager();
+		break;
+	}
+}
+
+void exit_browser(bool wait_for_ok)
+{
+	switch (use_browser) {
+	case 2:
+		exit_gtk_browser(wait_for_ok);
+		break;
+
+	case 1:
+		ui__exit(wait_for_ok);
+		break;
+
+	default:
+		break;
+	}
+	mutex_destroy(&ui__lock);
+}
+
+void pthread__block_sigwinch(void)
+{
+	sigset_t set;
+
+	sigemptyset(&set);
+	sigaddset(&set, SIGWINCH);
+	pthread_sigmask(SIG_BLOCK, &set, NULL);
+}
+
+void pthread__unblock_sigwinch(void)
+{
+	sigset_t set;
+
+	sigemptyset(&set);
+	sigaddset(&set, SIGWINCH);
+	pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
new file mode 100644
index 000000000..8c4c8925d
--- /dev/null
+++ b/tools/perf/ui/stdio/hist.c
@@ -0,0 +1,943 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/string.h>
+
+#include "../../util/callchain.h"
+#include "../../util/debug.h"
+#include "../../util/event.h"
+#include "../../util/hist.h"
+#include "../../util/map.h"
+#include "../../util/maps.h"
+#include "../../util/symbol.h"
+#include "../../util/sort.h"
+#include "../../util/evsel.h"
+#include "../../util/srcline.h"
+#include "../../util/string2.h"
+#include "../../util/thread.h"
+#include "../../util/block-info.h"
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
+
+static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
+{
+	int i;
+	int ret = fprintf(fp, "            ");
+
+	if (left_margin > USHRT_MAX)
+		left_margin = USHRT_MAX;
+
+	for (i = 0; i < left_margin; i++)
+		ret += fprintf(fp, " ");
+
+	return ret;
+}
+
+static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
+					  int left_margin)
+{
+	int i;
+	size_t ret = callchain__fprintf_left_margin(fp, left_margin);
+
+	for (i = 0; i < depth; i++)
+		if (depth_mask & (1 << i))
+			ret += fprintf(fp, "|          ");
+		else
+			ret += fprintf(fp, "           ");
+
+	ret += fprintf(fp, "\n");
+
+	return ret;
+}
+
+static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
+				     struct callchain_list *chain,
+				     int depth, int depth_mask, int period,
+				     u64 total_samples, int left_margin)
+{
+	int i;
+	size_t ret = 0;
+	char bf[1024], *alloc_str = NULL;
+	char buf[64];
+	const char *str;
+
+	ret += callchain__fprintf_left_margin(fp, left_margin);
+	for (i = 0; i < depth; i++) {
+		if (depth_mask & (1 << i))
+			ret += fprintf(fp, "|");
+		else
+			ret += fprintf(fp, " ");
+		if (!period && i == depth - 1) {
+			ret += fprintf(fp, "--");
+			ret += callchain_node__fprintf_value(node, fp, total_samples);
+			ret += fprintf(fp, "--");
+		} else
+			ret += fprintf(fp, "%s", "          ");
+	}
+
+	str = callchain_list__sym_name(chain, bf, sizeof(bf), false);
+
+	if (symbol_conf.show_branchflag_count) {
+		callchain_list_counts__printf_value(chain, NULL,
+						    buf, sizeof(buf));
+
+		if (asprintf(&alloc_str, "%s%s", str, buf) < 0)
+			str = "Not enough memory!";
+		else
+			str = alloc_str;
+	}
+
+	fputs(str, fp);
+	fputc('\n', fp);
+	free(alloc_str);
+
+	return ret;
+}
+
+static struct symbol *rem_sq_bracket;
+static struct callchain_list rem_hits;
+
+static void init_rem_hits(void)
+{
+	rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
+	if (!rem_sq_bracket) {
+		fprintf(stderr, "Not enough memory to display remaining hits\n");
+		return;
+	}
+
+	strcpy(rem_sq_bracket->name, "[...]");
+	rem_hits.ms.sym = rem_sq_bracket;
+}
+
+static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
+					 u64 total_samples, int depth,
+					 int depth_mask, int left_margin)
+{
+	struct rb_node *node, *next;
+	struct callchain_node *child = NULL;
+	struct callchain_list *chain;
+	int new_depth_mask = depth_mask;
+	u64 remaining;
+	size_t ret = 0;
+	int i;
+	uint entries_printed = 0;
+	int cumul_count = 0;
+
+	remaining = total_samples;
+
+	node = rb_first(root);
+	while (node) {
+		u64 new_total;
+		u64 cumul;
+
+		child = rb_entry(node, struct callchain_node, rb_node);
+		cumul = callchain_cumul_hits(child);
+		remaining -= cumul;
+		cumul_count += callchain_cumul_counts(child);
+
+		/*
+		 * The depth mask manages the output of pipes that show
+		 * the depth. We don't want to keep the pipes of the current
+		 * level for the last child of this depth.
+		 * Except if we have remaining filtered hits. They will
+		 * supersede the last child
+		 */
+		next = rb_next(node);
+		if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
+			new_depth_mask &= ~(1 << (depth - 1));
+
+		/*
+		 * But we keep the older depth mask for the line separator
+		 * to keep the level link until we reach the last child
+		 */
+		ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
+						   left_margin);
+		i = 0;
+		list_for_each_entry(chain, &child->val, list) {
+			ret += ipchain__fprintf_graph(fp, child, chain, depth,
+						      new_depth_mask, i++,
+						      total_samples,
+						      left_margin);
+		}
+
+		if (callchain_param.mode == CHAIN_GRAPH_REL)
+			new_total = child->children_hit;
+		else
+			new_total = total_samples;
+
+		ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
+						  depth + 1,
+						  new_depth_mask | (1 << depth),
+						  left_margin);
+		node = next;
+		if (++entries_printed == callchain_param.print_limit)
+			break;
+	}
+
+	if (callchain_param.mode == CHAIN_GRAPH_REL &&
+		remaining && remaining != total_samples) {
+		struct callchain_node rem_node = {
+			.hit = remaining,
+		};
+
+		if (!rem_sq_bracket)
+			return ret;
+
+		if (callchain_param.value == CCVAL_COUNT && child && child->parent) {
+			rem_node.count = child->parent->children_count - cumul_count;
+			if (rem_node.count <= 0)
+				return ret;
+		}
+
+		new_depth_mask &= ~(1 << (depth - 1));
+		ret += ipchain__fprintf_graph(fp, &rem_node, &rem_hits, depth,
+					      new_depth_mask, 0, total_samples,
+					      left_margin);
+	}
+
+	return ret;
+}
+
+/*
+ * If have one single callchain root, don't bother printing
+ * its percentage (100 % in fractal mode and the same percentage
+ * than the hist in graph mode). This also avoid one level of column.
+ *
+ * However when percent-limit applied, it's possible that single callchain
+ * node have different (non-100% in fractal mode) percentage.
+ */
+static bool need_percent_display(struct rb_node *node, u64 parent_samples)
+{
+	struct callchain_node *cnode;
+
+	if (rb_next(node))
+		return true;
+
+	cnode = rb_entry(node, struct callchain_node, rb_node);
+	return callchain_cumul_hits(cnode) != parent_samples;
+}
+
+static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
+				       u64 total_samples, u64 parent_samples,
+				       int left_margin)
+{
+	struct callchain_node *cnode;
+	struct callchain_list *chain;
+	u32 entries_printed = 0;
+	bool printed = false;
+	struct rb_node *node;
+	int i = 0;
+	int ret = 0;
+	char bf[1024];
+
+	node = rb_first(root);
+	if (node && !need_percent_display(node, parent_samples)) {
+		cnode = rb_entry(node, struct callchain_node, rb_node);
+		list_for_each_entry(chain, &cnode->val, list) {
+			/*
+			 * If we sort by symbol, the first entry is the same than
+			 * the symbol. No need to print it otherwise it appears as
+			 * displayed twice.
+			 */
+			if (!i++ && field_order == NULL &&
+			    sort_order && strstarts(sort_order, "sym"))
+				continue;
+
+			if (!printed) {
+				ret += callchain__fprintf_left_margin(fp, left_margin);
+				ret += fprintf(fp, "|\n");
+				ret += callchain__fprintf_left_margin(fp, left_margin);
+				ret += fprintf(fp, "---");
+				left_margin += 3;
+				printed = true;
+			} else
+				ret += callchain__fprintf_left_margin(fp, left_margin);
+
+			ret += fprintf(fp, "%s",
+				       callchain_list__sym_name(chain, bf,
+								sizeof(bf),
+								false));
+
+			if (symbol_conf.show_branchflag_count)
+				ret += callchain_list_counts__printf_value(
+						chain, fp, NULL, 0);
+			ret += fprintf(fp, "\n");
+
+			if (++entries_printed == callchain_param.print_limit)
+				break;
+		}
+		root = &cnode->rb_root;
+	}
+
+	if (callchain_param.mode == CHAIN_GRAPH_REL)
+		total_samples = parent_samples;
+
+	ret += __callchain__fprintf_graph(fp, root, total_samples,
+					  1, 1, left_margin);
+	if (ret) {
+		/* do not add a blank line if it printed nothing */
+		ret += fprintf(fp, "\n");
+	}
+
+	return ret;
+}
+
+static size_t __callchain__fprintf_flat(FILE *fp, struct callchain_node *node,
+					u64 total_samples)
+{
+	struct callchain_list *chain;
+	size_t ret = 0;
+	char bf[1024];
+
+	if (!node)
+		return 0;
+
+	ret += __callchain__fprintf_flat(fp, node->parent, total_samples);
+
+
+	list_for_each_entry(chain, &node->val, list) {
+		if (chain->ip >= PERF_CONTEXT_MAX)
+			continue;
+		ret += fprintf(fp, "                %s\n", callchain_list__sym_name(chain,
+					bf, sizeof(bf), false));
+	}
+
+	return ret;
+}
+
+static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *tree,
+				      u64 total_samples)
+{
+	size_t ret = 0;
+	u32 entries_printed = 0;
+	struct callchain_node *chain;
+	struct rb_node *rb_node = rb_first(tree);
+
+	while (rb_node) {
+		chain = rb_entry(rb_node, struct callchain_node, rb_node);
+
+		ret += fprintf(fp, "           ");
+		ret += callchain_node__fprintf_value(chain, fp, total_samples);
+		ret += fprintf(fp, "\n");
+		ret += __callchain__fprintf_flat(fp, chain, total_samples);
+		ret += fprintf(fp, "\n");
+		if (++entries_printed == callchain_param.print_limit)
+			break;
+
+		rb_node = rb_next(rb_node);
+	}
+
+	return ret;
+}
+
+static size_t __callchain__fprintf_folded(FILE *fp, struct callchain_node *node)
+{
+	const char *sep = symbol_conf.field_sep ?: ";";
+	struct callchain_list *chain;
+	size_t ret = 0;
+	char bf[1024];
+	bool first;
+
+	if (!node)
+		return 0;
+
+	ret += __callchain__fprintf_folded(fp, node->parent);
+
+	first = (ret == 0);
+	list_for_each_entry(chain, &node->val, list) {
+		if (chain->ip >= PERF_CONTEXT_MAX)
+			continue;
+		ret += fprintf(fp, "%s%s", first ? "" : sep,
+			       callchain_list__sym_name(chain,
+						bf, sizeof(bf), false));
+		first = false;
+	}
+
+	return ret;
+}
+
+static size_t callchain__fprintf_folded(FILE *fp, struct rb_root *tree,
+					u64 total_samples)
+{
+	size_t ret = 0;
+	u32 entries_printed = 0;
+	struct callchain_node *chain;
+	struct rb_node *rb_node = rb_first(tree);
+
+	while (rb_node) {
+
+		chain = rb_entry(rb_node, struct callchain_node, rb_node);
+
+		ret += callchain_node__fprintf_value(chain, fp, total_samples);
+		ret += fprintf(fp, " ");
+		ret += __callchain__fprintf_folded(fp, chain);
+		ret += fprintf(fp, "\n");
+		if (++entries_printed == callchain_param.print_limit)
+			break;
+
+		rb_node = rb_next(rb_node);
+	}
+
+	return ret;
+}
+
+static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
+					    u64 total_samples, int left_margin,
+					    FILE *fp)
+{
+	u64 parent_samples = he->stat.period;
+
+	if (symbol_conf.cumulate_callchain)
+		parent_samples = he->stat_acc->period;
+
+	switch (callchain_param.mode) {
+	case CHAIN_GRAPH_REL:
+		return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
+						parent_samples, left_margin);
+		break;
+	case CHAIN_GRAPH_ABS:
+		return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
+						parent_samples, left_margin);
+		break;
+	case CHAIN_FLAT:
+		return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
+		break;
+	case CHAIN_FOLDED:
+		return callchain__fprintf_folded(fp, &he->sorted_chain, total_samples);
+		break;
+	case CHAIN_NONE:
+		break;
+	default:
+		pr_err("Bad callchain mode\n");
+	}
+
+	return 0;
+}
+
+int __hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp,
+			   struct perf_hpp_list *hpp_list)
+{
+	const char *sep = symbol_conf.field_sep;
+	struct perf_hpp_fmt *fmt;
+	char *start = hpp->buf;
+	int ret;
+	bool first = true;
+
+	if (symbol_conf.exclude_other && !he->parent)
+		return 0;
+
+	perf_hpp_list__for_each_format(hpp_list, fmt) {
+		if (perf_hpp__should_skip(fmt, he->hists))
+			continue;
+
+		/*
+		 * If there's no field_sep, we still need
+		 * to display initial '  '.
+		 */
+		if (!sep || !first) {
+			ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
+			advance_hpp(hpp, ret);
+		} else
+			first = false;
+
+		if (perf_hpp__use_color() && fmt->color)
+			ret = fmt->color(fmt, hpp, he);
+		else
+			ret = fmt->entry(fmt, hpp, he);
+
+		ret = hist_entry__snprintf_alignment(he, hpp, fmt, ret);
+		advance_hpp(hpp, ret);
+	}
+
+	return hpp->buf - start;
+}
+
+static int hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp)
+{
+	return __hist_entry__snprintf(he, hpp, he->hists->hpp_list);
+}
+
+static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
+					 struct perf_hpp *hpp,
+					 struct hists *hists,
+					 FILE *fp)
+{
+	const char *sep = symbol_conf.field_sep;
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	char *buf = hpp->buf;
+	size_t size = hpp->size;
+	int ret, printed = 0;
+	bool first = true;
+
+	if (symbol_conf.exclude_other && !he->parent)
+		return 0;
+
+	ret = scnprintf(hpp->buf, hpp->size, "%*s", he->depth * HIERARCHY_INDENT, "");
+	advance_hpp(hpp, ret);
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		/*
+		 * If there's no field_sep, we still need
+		 * to display initial '  '.
+		 */
+		if (!sep || !first) {
+			ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
+			advance_hpp(hpp, ret);
+		} else
+			first = false;
+
+		if (perf_hpp__use_color() && fmt->color)
+			ret = fmt->color(fmt, hpp, he);
+		else
+			ret = fmt->entry(fmt, hpp, he);
+
+		ret = hist_entry__snprintf_alignment(he, hpp, fmt, ret);
+		advance_hpp(hpp, ret);
+	}
+
+	if (!sep)
+		ret = scnprintf(hpp->buf, hpp->size, "%*s",
+				(hists->nr_hpp_node - 2) * HIERARCHY_INDENT, "");
+	advance_hpp(hpp, ret);
+
+	printed += fprintf(fp, "%s", buf);
+
+	perf_hpp_list__for_each_format(he->hpp_list, fmt) {
+		hpp->buf  = buf;
+		hpp->size = size;
+
+		/*
+		 * No need to call hist_entry__snprintf_alignment() since this
+		 * fmt is always the last column in the hierarchy mode.
+		 */
+		if (perf_hpp__use_color() && fmt->color)
+			fmt->color(fmt, hpp, he);
+		else
+			fmt->entry(fmt, hpp, he);
+
+		/*
+		 * dynamic entries are right-aligned but we want left-aligned
+		 * in the hierarchy mode
+		 */
+		printed += fprintf(fp, "%s%s", sep ?: "  ", skip_spaces(buf));
+	}
+	printed += putc('\n', fp);
+
+	if (he->leaf && hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
+		u64 total = hists__total_period(hists);
+
+		printed += hist_entry_callchain__fprintf(he, total, 0, fp);
+		goto out;
+	}
+
+out:
+	return printed;
+}
+
+static int hist_entry__block_fprintf(struct hist_entry *he,
+				     char *bf, size_t size,
+				     FILE *fp)
+{
+	struct block_hist *bh = container_of(he, struct block_hist, he);
+	int ret = 0;
+
+	for (unsigned int i = 0; i < bh->block_hists.nr_entries; i++) {
+		struct perf_hpp hpp = {
+			.buf		= bf,
+			.size		= size,
+			.skip		= false,
+		};
+
+		bh->block_idx = i;
+		hist_entry__snprintf(he, &hpp);
+
+		if (!hpp.skip)
+			ret += fprintf(fp, "%s\n", bf);
+	}
+
+	return ret;
+}
+
+static int hist_entry__individual_block_fprintf(struct hist_entry *he,
+						char *bf, size_t size,
+						FILE *fp)
+{
+	int ret = 0;
+
+	struct perf_hpp hpp = {
+		.buf		= bf,
+		.size		= size,
+		.skip		= false,
+	};
+
+	hist_entry__snprintf(he, &hpp);
+	if (!hpp.skip)
+		ret += fprintf(fp, "%s\n", bf);
+
+	return ret;
+}
+
+static int hist_entry__fprintf(struct hist_entry *he, size_t size,
+			       char *bf, size_t bfsz, FILE *fp,
+			       bool ignore_callchains)
+{
+	int ret;
+	int callchain_ret = 0;
+	struct perf_hpp hpp = {
+		.buf		= bf,
+		.size		= size,
+	};
+	struct hists *hists = he->hists;
+	u64 total_period = hists->stats.total_period;
+
+	if (size == 0 || size > bfsz)
+		size = hpp.size = bfsz;
+
+	if (symbol_conf.report_hierarchy)
+		return hist_entry__hierarchy_fprintf(he, &hpp, hists, fp);
+
+	if (symbol_conf.report_block)
+		return hist_entry__block_fprintf(he, bf, size, fp);
+
+	if (symbol_conf.report_individual_block)
+		return hist_entry__individual_block_fprintf(he, bf, size, fp);
+
+	hist_entry__snprintf(he, &hpp);
+
+	ret = fprintf(fp, "%s\n", bf);
+
+	if (hist_entry__has_callchains(he) && !ignore_callchains)
+		callchain_ret = hist_entry_callchain__fprintf(he, total_period,
+							      0, fp);
+
+	ret += callchain_ret;
+
+	return ret;
+}
+
+static int print_hierarchy_indent(const char *sep, int indent,
+				  const char *line, FILE *fp)
+{
+	int width;
+
+	if (sep != NULL || indent < 2)
+		return 0;
+
+	width = (indent - 2) * HIERARCHY_INDENT;
+
+	return fprintf(fp, "%-*.*s", width, width, line);
+}
+
+static int hists__fprintf_hierarchy_headers(struct hists *hists,
+					    struct perf_hpp *hpp, FILE *fp)
+{
+	bool first_node, first_col;
+	int indent;
+	int depth;
+	unsigned width = 0;
+	unsigned header_width = 0;
+	struct perf_hpp_fmt *fmt;
+	struct perf_hpp_list_node *fmt_node;
+	struct perf_hpp_list *hpp_list = hists->hpp_list;
+	const char *sep = symbol_conf.field_sep;
+
+	indent = hists->nr_hpp_node;
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+
+	for (int line = 0; line < hpp_list->nr_header_lines; line++) {
+		/* first # is displayed one level up */
+		if (line)
+			fprintf(fp, "# ");
+
+		/* preserve max indent depth for column headers */
+		print_hierarchy_indent(sep, indent, " ", fp);
+
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+			fmt->header(fmt, hpp, hists, line, NULL);
+			fprintf(fp, "%s%s", hpp->buf, sep ?: "  ");
+		}
+
+		if (line < hpp_list->nr_header_lines - 1)
+			goto next_line;
+
+		/* combine sort headers with ' / ' */
+		first_node = true;
+		list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
+			if (!first_node)
+				header_width += fprintf(fp, " / ");
+			first_node = false;
+
+			first_col = true;
+			perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+				if (perf_hpp__should_skip(fmt, hists))
+					continue;
+
+				if (!first_col)
+					header_width += fprintf(fp, "+");
+				first_col = false;
+
+				fmt->header(fmt, hpp, hists, line, NULL);
+
+				header_width += fprintf(fp, "%s", strim(hpp->buf));
+			}
+		}
+
+next_line:
+		fprintf(fp, "\n");
+	}
+
+	fprintf(fp, "# ");
+
+	/* preserve max indent depth for initial dots */
+	print_hierarchy_indent(sep, indent, dots, fp);
+
+	/* the first hpp_list_node is for overhead columns */
+	fmt_node = list_first_entry(&hists->hpp_formats,
+				    struct perf_hpp_list_node, list);
+
+	first_col = true;
+	perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+		if (!first_col)
+			fprintf(fp, "%s", sep ?: "..");
+		first_col = false;
+
+		width = fmt->width(fmt, hpp, hists);
+		fprintf(fp, "%.*s", width, dots);
+	}
+
+	depth = 0;
+	list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
+		first_col = true;
+		width = depth * HIERARCHY_INDENT;
+
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
+			if (perf_hpp__should_skip(fmt, hists))
+				continue;
+
+			if (!first_col)
+				width++;  /* for '+' sign between column header */
+			first_col = false;
+
+			width += fmt->width(fmt, hpp, hists);
+		}
+
+		if (width > header_width)
+			header_width = width;
+
+		depth++;
+	}
+
+	fprintf(fp, "%s%-.*s", sep ?: "  ", header_width, dots);
+
+	fprintf(fp, "\n#\n");
+
+	return 2;
+}
+
+static void fprintf_line(struct hists *hists, struct perf_hpp *hpp,
+			 int line, FILE *fp)
+{
+	struct perf_hpp_fmt *fmt;
+	const char *sep = symbol_conf.field_sep;
+	bool first = true;
+	int span = 0;
+
+	hists__for_each_format(hists, fmt) {
+		if (perf_hpp__should_skip(fmt, hists))
+			continue;
+
+		if (!first && !span)
+			fprintf(fp, "%s", sep ?: "  ");
+		else
+			first = false;
+
+		fmt->header(fmt, hpp, hists, line, &span);
+
+		if (!span)
+			fprintf(fp, "%s", hpp->buf);
+	}
+}
+
+static int
+hists__fprintf_standard_headers(struct hists *hists,
+				struct perf_hpp *hpp,
+				FILE *fp)
+{
+	struct perf_hpp_list *hpp_list = hists->hpp_list;
+	struct perf_hpp_fmt *fmt;
+	unsigned int width;
+	const char *sep = symbol_conf.field_sep;
+	bool first = true;
+	int line;
+
+	for (line = 0; line < hpp_list->nr_header_lines; line++) {
+		/* first # is displayed one level up */
+		if (line)
+			fprintf(fp, "# ");
+		fprintf_line(hists, hpp, line, fp);
+		fprintf(fp, "\n");
+	}
+
+	if (sep)
+		return hpp_list->nr_header_lines;
+
+	first = true;
+
+	fprintf(fp, "# ");
+
+	hists__for_each_format(hists, fmt) {
+		unsigned int i;
+
+		if (perf_hpp__should_skip(fmt, hists))
+			continue;
+
+		if (!first)
+			fprintf(fp, "%s", sep ?: "  ");
+		else
+			first = false;
+
+		width = fmt->width(fmt, hpp, hists);
+		for (i = 0; i < width; i++)
+			fprintf(fp, ".");
+	}
+
+	fprintf(fp, "\n");
+	fprintf(fp, "#\n");
+	return hpp_list->nr_header_lines + 2;
+}
+
+int hists__fprintf_headers(struct hists *hists, FILE *fp)
+{
+	char bf[1024];
+	struct perf_hpp dummy_hpp = {
+		.buf	= bf,
+		.size	= sizeof(bf),
+	};
+
+	fprintf(fp, "# ");
+
+	if (symbol_conf.report_hierarchy)
+		return hists__fprintf_hierarchy_headers(hists, &dummy_hpp, fp);
+	else
+		return hists__fprintf_standard_headers(hists, &dummy_hpp, fp);
+
+}
+
+size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
+		      int max_cols, float min_pcnt, FILE *fp,
+		      bool ignore_callchains)
+{
+	struct rb_node *nd;
+	size_t ret = 0;
+	const char *sep = symbol_conf.field_sep;
+	int nr_rows = 0;
+	size_t linesz;
+	char *line = NULL;
+	unsigned indent;
+
+	init_rem_hits();
+
+	hists__reset_column_width(hists);
+
+	if (symbol_conf.col_width_list_str)
+		perf_hpp__set_user_width(symbol_conf.col_width_list_str);
+
+	if (show_header)
+		nr_rows += hists__fprintf_headers(hists, fp);
+
+	if (max_rows && nr_rows >= max_rows)
+		goto out;
+
+	linesz = hists__sort_list_width(hists) + 3 + 1;
+	linesz += perf_hpp__color_overhead();
+	line = malloc(linesz);
+	if (line == NULL) {
+		ret = -1;
+		goto out;
+	}
+
+	indent = hists__overhead_width(hists) + 4;
+
+	for (nd = rb_first_cached(&hists->entries); nd;
+	     nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD)) {
+		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+		float percent;
+
+		if (h->filtered)
+			continue;
+
+		if (symbol_conf.report_individual_block)
+			percent = block_info__total_cycles_percent(h);
+		else
+			percent = hist_entry__get_percent_limit(h);
+
+		if (percent < min_pcnt)
+			continue;
+
+		ret += hist_entry__fprintf(h, max_cols, line, linesz, fp, ignore_callchains);
+
+		if (max_rows && ++nr_rows >= max_rows)
+			break;
+
+		/*
+		 * If all children are filtered out or percent-limited,
+		 * display "no entry >= x.xx%" message.
+		 */
+		if (!h->leaf && !hist_entry__has_hierarchy_children(h, min_pcnt)) {
+			int depth = hists->nr_hpp_node + h->depth + 1;
+
+			print_hierarchy_indent(sep, depth, " ", fp);
+			fprintf(fp, "%*sno entry >= %.2f%%\n", indent, "", min_pcnt);
+
+			if (max_rows && ++nr_rows >= max_rows)
+				break;
+		}
+
+		if (h->ms.map == NULL && verbose > 1) {
+			maps__fprintf(thread__maps(h->thread), fp);
+			fprintf(fp, "%.10s end\n", graph_dotted_line);
+		}
+	}
+
+	free(line);
+out:
+	zfree(&rem_sq_bracket);
+
+	return ret;
+}
+
+size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
+{
+	int i;
+	size_t ret = 0;
+	u32 total = stats->nr_events[0];
+
+	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
+		const char *name;
+
+		name = perf_event__name(i);
+		if (!strcmp(name, "UNKNOWN"))
+			continue;
+		if (symbol_conf.skip_empty && !stats->nr_events[i])
+			continue;
+
+		if (i && total) {
+			ret += fprintf(fp, "%20s events: %10d  (%4.1f%%)\n",
+				       name, stats->nr_events[i],
+				       100.0 * stats->nr_events[i] / total);
+		} else {
+			ret += fprintf(fp, "%20s events: %10d\n",
+				       name, stats->nr_events[i]);
+		}
+	}
+
+	return ret;
+}
diff --git a/tools/perf/ui/tui/Build b/tools/perf/ui/tui/Build
new file mode 100644
index 000000000..2ac058ad1
--- /dev/null
+++ b/tools/perf/ui/tui/Build
@@ -0,0 +1,4 @@
+perf-ui-y += setup.o
+perf-ui-y += util.o
+perf-ui-y += helpline.o
+perf-ui-y += progress.o
diff --git a/tools/perf/ui/tui/helpline.c b/tools/perf/ui/tui/helpline.c
new file mode 100644
index 000000000..b39451314
--- /dev/null
+++ b/tools/perf/ui/tui/helpline.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include "../helpline.h"
+#include "../ui.h"
+#include "../libslang.h"
+
+char ui_helpline__last_msg[1024];
+bool tui_helpline__set;
+
+static void tui_helpline__pop(void)
+{
+}
+
+static void tui_helpline__push(const char *msg)
+{
+	const size_t sz = sizeof(ui_helpline__current);
+
+	SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);
+	SLsmg_set_color(0);
+	SLsmg_write_nstring(msg, SLtt_Screen_Cols);
+	SLsmg_refresh();
+	strlcpy(ui_helpline__current, msg, sz);
+}
+
+static int tui_helpline__show(const char *format, va_list ap)
+{
+	int ret;
+	static int backlog;
+
+	mutex_lock(&ui__lock);
+	ret = vscnprintf(ui_helpline__last_msg + backlog,
+			sizeof(ui_helpline__last_msg) - backlog, format, ap);
+	backlog += ret;
+
+	tui_helpline__set = true;
+
+	if (ui_helpline__last_msg[backlog - 1] == '\n') {
+		ui_helpline__puts(ui_helpline__last_msg);
+		SLsmg_refresh();
+		backlog = 0;
+	}
+	mutex_unlock(&ui__lock);
+
+	return ret;
+}
+
+struct ui_helpline tui_helpline_fns = {
+	.pop	= tui_helpline__pop,
+	.push	= tui_helpline__push,
+	.show	= tui_helpline__show,
+};
+
+void ui_helpline__init(void)
+{
+	helpline_fns = &tui_helpline_fns;
+	ui_helpline__puts(" ");
+}
diff --git a/tools/perf/ui/tui/progress.c b/tools/perf/ui/tui/progress.c
new file mode 100644
index 000000000..71b6c8d94
--- /dev/null
+++ b/tools/perf/ui/tui/progress.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include "../progress.h"
+#include "../libslang.h"
+#include "../ui.h"
+#include "tui.h"
+#include "units.h"
+#include "../browser.h"
+
+static void __tui_progress__init(struct ui_progress *p)
+{
+	p->next = p->step = p->total / (SLtt_Screen_Cols - 2) ?: 1;
+}
+
+static int get_title(struct ui_progress *p, char *buf, size_t size)
+{
+	char buf_cur[20];
+	char buf_tot[20];
+	int ret;
+
+	ret  = unit_number__scnprintf(buf_cur, sizeof(buf_cur), p->curr);
+	ret += unit_number__scnprintf(buf_tot, sizeof(buf_tot), p->total);
+
+	return ret + scnprintf(buf, size, "%s [%s/%s]",
+			       p->title, buf_cur, buf_tot);
+}
+
+static void tui_progress__update(struct ui_progress *p)
+{
+	char buf[100], *title = (char *) p->title;
+	int bar, y;
+	/*
+	 * FIXME: We should have a per UI backend way of showing progress,
+	 * stdio will just show a percentage as NN%, etc.
+	 */
+	if (use_browser <= 0)
+		return;
+
+	if (p->total == 0)
+		return;
+
+	if (p->size) {
+		get_title(p, buf, sizeof(buf));
+		title = buf;
+	}
+
+	ui__refresh_dimensions(false);
+	mutex_lock(&ui__lock);
+	y = SLtt_Screen_Rows / 2 - 2;
+	SLsmg_set_color(0);
+	SLsmg_draw_box(y, 0, 3, SLtt_Screen_Cols);
+	SLsmg_gotorc(y++, 1);
+	SLsmg_write_string(title);
+	SLsmg_fill_region(y, 1, 1, SLtt_Screen_Cols - 2, ' ');
+	SLsmg_set_color(HE_COLORSET_SELECTED);
+	bar = ((SLtt_Screen_Cols - 2) * p->curr) / p->total;
+	SLsmg_fill_region(y, 1, 1, bar, ' ');
+	SLsmg_refresh();
+	mutex_unlock(&ui__lock);
+}
+
+static void tui_progress__finish(void)
+{
+	int y;
+
+	if (use_browser <= 0)
+		return;
+
+	ui__refresh_dimensions(false);
+	mutex_lock(&ui__lock);
+	y = SLtt_Screen_Rows / 2 - 2;
+	SLsmg_set_color(0);
+	SLsmg_fill_region(y, 0, 3, SLtt_Screen_Cols, ' ');
+	SLsmg_refresh();
+	mutex_unlock(&ui__lock);
+}
+
+static struct ui_progress_ops tui_progress__ops = {
+	.init   = __tui_progress__init,
+	.update = tui_progress__update,
+	.finish = tui_progress__finish,
+};
+
+void tui_progress__init(void)
+{
+	ui_progress__ops = &tui_progress__ops;
+}
diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
new file mode 100644
index 000000000..022534eed
--- /dev/null
+++ b/tools/perf/ui/tui/setup.c
@@ -0,0 +1,201 @@
+#include <errno.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+#include <linux/kernel.h>
+#ifdef HAVE_BACKTRACE_SUPPORT
+#include <execinfo.h>
+#endif
+
+#include "../../util/color.h"
+#include "../../util/debug.h"
+#include "../browser.h"
+#include "../helpline.h"
+#include "../ui.h"
+#include "../util.h"
+#include "../libslang.h"
+#include "../keysyms.h"
+#include "tui.h"
+
+static volatile int ui__need_resize;
+
+extern struct perf_error_ops perf_tui_eops;
+extern bool tui_helpline__set;
+
+extern void hist_browser__init_hpp(void);
+
+void ui__refresh_dimensions(bool force)
+{
+	if (force || ui__need_resize) {
+		ui__need_resize = 0;
+		mutex_lock(&ui__lock);
+		SLtt_get_screen_size();
+		SLsmg_reinit_smg();
+		mutex_unlock(&ui__lock);
+	}
+}
+
+static void ui__sigwinch(int sig __maybe_unused)
+{
+	ui__need_resize = 1;
+}
+
+static void ui__setup_sigwinch(void)
+{
+	static bool done;
+
+	if (done)
+		return;
+
+	done = true;
+	pthread__unblock_sigwinch();
+	signal(SIGWINCH, ui__sigwinch);
+}
+
+int ui__getch(int delay_secs)
+{
+	struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
+	fd_set read_set;
+	int err, key;
+
+	ui__setup_sigwinch();
+
+	FD_ZERO(&read_set);
+	FD_SET(0, &read_set);
+
+	if (delay_secs) {
+		timeout.tv_sec = delay_secs;
+		timeout.tv_usec = 0;
+	}
+
+        err = select(1, &read_set, NULL, NULL, ptimeout);
+
+	if (err == 0)
+		return K_TIMER;
+
+	if (err == -1) {
+		if (errno == EINTR)
+			return K_RESIZE;
+		return K_ERROR;
+	}
+
+	key = SLang_getkey();
+	if (key != K_ESC)
+		return key;
+
+	FD_ZERO(&read_set);
+	FD_SET(0, &read_set);
+	timeout.tv_sec = 0;
+	timeout.tv_usec = 20;
+        err = select(1, &read_set, NULL, NULL, &timeout);
+	if (err == 0)
+		return K_ESC;
+
+	SLang_ungetkey(key);
+	return SLkp_getkey();
+}
+
+#ifdef HAVE_BACKTRACE_SUPPORT
+static void ui__signal_backtrace(int sig)
+{
+	void *stackdump[32];
+	size_t size;
+
+	ui__exit(false);
+	psignal(sig, "perf");
+
+	printf("-------- backtrace --------\n");
+	size = backtrace(stackdump, ARRAY_SIZE(stackdump));
+	__dump_stack(stdout, stackdump, size);
+
+	exit(0);
+}
+#else
+# define ui__signal_backtrace  ui__signal
+#endif
+
+static void ui__signal(int sig)
+{
+	ui__exit(false);
+	psignal(sig, "perf");
+	exit(0);
+}
+
+static void ui__sigcont(int sig)
+{
+	static struct termios tty;
+
+	if (sig == SIGTSTP) {
+		while (tcgetattr(SLang_TT_Read_FD, &tty) == -1 && errno == EINTR)
+			;
+		while (write(SLang_TT_Read_FD, PERF_COLOR_RESET, sizeof(PERF_COLOR_RESET) - 1) == -1 && errno == EINTR)
+			;
+		raise(SIGSTOP);
+	} else {
+		while (tcsetattr(SLang_TT_Read_FD, TCSADRAIN, &tty) == -1 && errno == EINTR)
+			;
+		raise(SIGWINCH);
+	}
+}
+
+int ui__init(void)
+{
+	int err;
+
+	SLutf8_enable(-1);
+	SLtt_get_terminfo();
+	SLtt_get_screen_size();
+
+	err = SLsmg_init_smg();
+	if (err < 0)
+		goto out;
+	err = SLang_init_tty(-1, 0, 0);
+	if (err < 0)
+		goto out;
+	SLtty_set_suspend_state(true);
+
+	err = SLkp_init();
+	if (err < 0) {
+		pr_err("TUI initialization failed.\n");
+		goto out;
+	}
+
+	SLkp_define_keysym("^(kB)", SL_KEY_UNTAB);
+
+	signal(SIGSEGV, ui__signal_backtrace);
+	signal(SIGFPE, ui__signal_backtrace);
+	signal(SIGINT, ui__signal);
+	signal(SIGQUIT, ui__signal);
+	signal(SIGTERM, ui__signal);
+	signal(SIGTSTP, ui__sigcont);
+	signal(SIGCONT, ui__sigcont);
+
+	perf_error__register(&perf_tui_eops);
+
+	ui_helpline__init();
+	ui_browser__init();
+	tui_progress__init();
+
+	hist_browser__init_hpp();
+out:
+	return err;
+}
+
+void ui__exit(bool wait_for_ok)
+{
+	if (wait_for_ok && tui_helpline__set)
+		ui__question_window("Fatal Error",
+				    ui_helpline__last_msg,
+				    "Press any key...", 0);
+
+	SLtt_set_cursor_visibility(1);
+	if (mutex_trylock(&ui__lock)) {
+		SLsmg_refresh();
+		SLsmg_reset_smg();
+		mutex_unlock(&ui__lock);
+	}
+	SLang_reset_tty();
+	perf_error__unregister(&perf_tui_eops);
+}
diff --git a/tools/perf/ui/tui/tui.h b/tools/perf/ui/tui/tui.h
new file mode 100644
index 000000000..8de06f634
--- /dev/null
+++ b/tools/perf/ui/tui/tui.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_TUI_H_
+#define _PERF_TUI_H_ 1
+
+void tui_progress__init(void);
+
+#endif /* _PERF_TUI_H_ */
diff --git a/tools/perf/ui/tui/util.c b/tools/perf/ui/tui/util.c
new file mode 100644
index 000000000..e4d322ce0
--- /dev/null
+++ b/tools/perf/ui/tui/util.c
@@ -0,0 +1,274 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <signal.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/ttydefaults.h>
+
+#include "../browser.h"
+#include "../keysyms.h"
+#include "../helpline.h"
+#include "../ui.h"
+#include "../util.h"
+#include "../libslang.h"
+
+static void ui_browser__argv_write(struct ui_browser *browser,
+				   void *entry, int row)
+{
+	char **arg = entry;
+	bool current_entry = ui_browser__is_current_entry(browser, row);
+
+	ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
+						       HE_COLORSET_NORMAL);
+	ui_browser__write_nstring(browser, *arg, browser->width);
+}
+
+static int popup_menu__run(struct ui_browser *menu, int *keyp)
+{
+	int key;
+
+	if (ui_browser__show(menu, " ", "ESC: exit, ENTER|->: Select option") < 0)
+		return -1;
+
+	while (1) {
+		key = ui_browser__run(menu, 0);
+
+		switch (key) {
+		case K_RIGHT:
+		case K_ENTER:
+			key = menu->index;
+			break;
+		case K_LEFT:
+		case K_ESC:
+		case 'q':
+		case CTRL('c'):
+			key = -1;
+			break;
+		default:
+			if (keyp) {
+				*keyp = key;
+				key = menu->nr_entries;
+				break;
+			}
+			continue;
+		}
+
+		break;
+	}
+
+	ui_browser__hide(menu);
+	return key;
+}
+
+int ui__popup_menu(int argc, char * const argv[], int *keyp)
+{
+	struct ui_browser menu = {
+		.entries    = (void *)argv,
+		.refresh    = ui_browser__argv_refresh,
+		.seek	    = ui_browser__argv_seek,
+		.write	    = ui_browser__argv_write,
+		.nr_entries = argc,
+	};
+	return popup_menu__run(&menu, keyp);
+}
+
+int ui_browser__input_window(const char *title, const char *text, char *input,
+			     const char *exit_msg, int delay_secs)
+{
+	int x, y, len, key;
+	int max_len = 60, nr_lines = 0;
+	static char buf[50];
+	const char *t;
+
+	t = text;
+	while (1) {
+		const char *sep = strchr(t, '\n');
+
+		if (sep == NULL)
+			sep = strchr(t, '\0');
+		len = sep - t;
+		if (max_len < len)
+			max_len = len;
+		++nr_lines;
+		if (*sep == '\0')
+			break;
+		t = sep + 1;
+	}
+
+	mutex_lock(&ui__lock);
+
+	max_len += 2;
+	nr_lines += 8;
+	y = SLtt_Screen_Rows / 2 - nr_lines / 2;
+	x = SLtt_Screen_Cols / 2 - max_len / 2;
+
+	SLsmg_set_color(0);
+	SLsmg_draw_box(y, x++, nr_lines, max_len);
+	if (title) {
+		SLsmg_gotorc(y, x + 1);
+		SLsmg_write_string(title);
+	}
+	SLsmg_gotorc(++y, x);
+	nr_lines -= 7;
+	max_len -= 2;
+	SLsmg_write_wrapped_string((unsigned char *)text, y, x,
+				   nr_lines, max_len, 1);
+	y += nr_lines;
+	len = 5;
+	while (len--) {
+		SLsmg_gotorc(y + len - 1, x);
+		SLsmg_write_nstring(" ", max_len);
+	}
+	SLsmg_draw_box(y++, x + 1, 3, max_len - 2);
+
+	SLsmg_gotorc(y + 3, x);
+	SLsmg_write_nstring(exit_msg, max_len);
+	SLsmg_refresh();
+
+	mutex_unlock(&ui__lock);
+
+	x += 2;
+	len = 0;
+	key = ui__getch(delay_secs);
+	while (key != K_TIMER && key != K_ENTER && key != K_ESC) {
+		mutex_lock(&ui__lock);
+
+		if (key == K_BKSPC) {
+			if (len == 0) {
+				mutex_unlock(&ui__lock);
+				goto next_key;
+			}
+			SLsmg_gotorc(y, x + --len);
+			SLsmg_write_char(' ');
+		} else {
+			buf[len] = key;
+			SLsmg_gotorc(y, x + len++);
+			SLsmg_write_char(key);
+		}
+		SLsmg_refresh();
+
+		mutex_unlock(&ui__lock);
+
+		/* XXX more graceful overflow handling needed */
+		if (len == sizeof(buf) - 1) {
+			ui_helpline__push("maximum size of symbol name reached!");
+			key = K_ENTER;
+			break;
+		}
+next_key:
+		key = ui__getch(delay_secs);
+	}
+
+	buf[len] = '\0';
+	strncpy(input, buf, len+1);
+	return key;
+}
+
+void __ui__info_window(const char *title, const char *text, const char *exit_msg)
+{
+	int x, y;
+	int max_len = 0, nr_lines = 0;
+	const char *t;
+
+	t = text;
+	while (1) {
+		const char *sep = strchr(t, '\n');
+		int len;
+
+		if (sep == NULL)
+			sep = strchr(t, '\0');
+		len = sep - t;
+		if (max_len < len)
+			max_len = len;
+		++nr_lines;
+		if (*sep == '\0')
+			break;
+		t = sep + 1;
+	}
+
+	max_len += 2;
+	nr_lines += 2;
+	if (exit_msg)
+		nr_lines += 2;
+	y = SLtt_Screen_Rows / 2 - nr_lines / 2,
+	x = SLtt_Screen_Cols / 2 - max_len / 2;
+
+	SLsmg_set_color(0);
+	SLsmg_draw_box(y, x++, nr_lines, max_len);
+	if (title) {
+		SLsmg_gotorc(y, x + 1);
+		SLsmg_write_string(title);
+	}
+	SLsmg_gotorc(++y, x);
+	if (exit_msg)
+		nr_lines -= 2;
+	max_len -= 2;
+	SLsmg_write_wrapped_string((unsigned char *)text, y, x,
+				   nr_lines, max_len, 1);
+	if (exit_msg) {
+		SLsmg_gotorc(y + nr_lines - 2, x);
+		SLsmg_write_nstring(" ", max_len);
+		SLsmg_gotorc(y + nr_lines - 1, x);
+		SLsmg_write_nstring(exit_msg, max_len);
+	}
+}
+
+void ui__info_window(const char *title, const char *text)
+{
+	mutex_lock(&ui__lock);
+	__ui__info_window(title, text, NULL);
+	SLsmg_refresh();
+	mutex_unlock(&ui__lock);
+}
+
+int ui__question_window(const char *title, const char *text,
+			const char *exit_msg, int delay_secs)
+{
+	mutex_lock(&ui__lock);
+	__ui__info_window(title, text, exit_msg);
+	SLsmg_refresh();
+	mutex_unlock(&ui__lock);
+	return ui__getch(delay_secs);
+}
+
+int ui__help_window(const char *text)
+{
+	return ui__question_window("Help", text, "Press any key...", 0);
+}
+
+int ui__dialog_yesno(const char *msg)
+{
+	return ui__question_window(NULL, msg, "Enter: Yes, ESC: No", 0);
+}
+
+static int __ui__warning(const char *title, const char *format, va_list args)
+{
+	char *s;
+
+	if (vasprintf(&s, format, args) > 0) {
+		int key;
+
+		key = ui__question_window(title, s, "Press any key...", 0);
+		free(s);
+		return key;
+	}
+
+	fprintf(stderr, "%s\n", title);
+	vfprintf(stderr, format, args);
+	return K_ESC;
+}
+
+static int perf_tui__error(const char *format, va_list args)
+{
+	return __ui__warning("Error:", format, args);
+}
+
+static int perf_tui__warning(const char *format, va_list args)
+{
+	return __ui__warning("Warning:", format, args);
+}
+
+struct perf_error_ops perf_tui_eops = {
+	.error		= perf_tui__error,
+	.warning	= perf_tui__warning,
+};
diff --git a/tools/perf/ui/ui.h b/tools/perf/ui/ui.h
new file mode 100644
index 000000000..d8e911205
--- /dev/null
+++ b/tools/perf/ui/ui.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_H_
+#define _PERF_UI_H_ 1
+
+#include "../util/mutex.h"
+#include <stdbool.h>
+#include <linux/compiler.h>
+
+extern struct mutex ui__lock;
+extern void *perf_gtk_handle;
+
+extern int use_browser;
+
+void setup_browser(bool fallback_to_pager);
+void exit_browser(bool wait_for_ok);
+
+#ifdef HAVE_SLANG_SUPPORT
+int ui__init(void);
+void ui__exit(bool wait_for_ok);
+#else
+static inline int ui__init(void)
+{
+	return -1;
+}
+static inline void ui__exit(bool wait_for_ok __maybe_unused) {}
+#endif
+
+void ui__refresh_dimensions(bool force);
+
+struct option;
+
+int stdio__config_color(const struct option *opt, const char *mode, int unset);
+
+void pthread__block_sigwinch(void);
+void pthread__unblock_sigwinch(void);
+
+#endif /* _PERF_UI_H_ */
diff --git a/tools/perf/ui/util.c b/tools/perf/ui/util.c
new file mode 100644
index 000000000..1d38ddf01
--- /dev/null
+++ b/tools/perf/ui/util.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "util.h"
+#include "../util/debug.h"
+#include <stdio.h>
+
+/*
+ * Default error logging functions
+ */
+static int perf_stdio__error(const char *format, va_list args)
+{
+	fprintf(stderr, "Error:\n");
+	vfprintf(stderr, format, args);
+	return 0;
+}
+
+static int perf_stdio__warning(const char *format, va_list args)
+{
+	if (quiet)
+		return 0;
+
+	fprintf(stderr, "Warning:\n");
+	vfprintf(stderr, format, args);
+	return 0;
+}
+
+static struct perf_error_ops default_eops =
+{
+	.error		= perf_stdio__error,
+	.warning	= perf_stdio__warning,
+};
+
+static struct perf_error_ops *perf_eops = &default_eops;
+
+
+int ui__error(const char *format, ...)
+{
+	int ret;
+	va_list args;
+
+	va_start(args, format);
+	ret = perf_eops->error(format, args);
+	va_end(args);
+
+	return ret;
+}
+
+int ui__warning(const char *format, ...)
+{
+	int ret;
+	va_list args;
+	if (quiet)
+		return 0;
+
+	va_start(args, format);
+	ret = perf_eops->warning(format, args);
+	va_end(args);
+
+	return ret;
+}
+
+/**
+ * perf_error__register - Register error logging functions
+ * @eops: The pointer to error logging function struct
+ *
+ * Register UI-specific error logging functions. Before calling this,
+ * other logging functions should be unregistered, if any.
+ */
+int perf_error__register(struct perf_error_ops *eops)
+{
+	if (perf_eops != &default_eops)
+		return -1;
+
+	perf_eops = eops;
+	return 0;
+}
+
+/**
+ * perf_error__unregister - Unregister error logging functions
+ * @eops: The pointer to error logging function struct
+ *
+ * Unregister already registered error logging functions.
+ */
+int perf_error__unregister(struct perf_error_ops *eops)
+{
+	if (perf_eops != eops)
+		return -1;
+
+	perf_eops = &default_eops;
+	return 0;
+}
diff --git a/tools/perf/ui/util.h b/tools/perf/ui/util.h
new file mode 100644
index 000000000..e30cea807
--- /dev/null
+++ b/tools/perf/ui/util.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PERF_UI_UTIL_H_
+#define _PERF_UI_UTIL_H_ 1
+
+#include <stdarg.h>
+
+int ui__getch(int delay_secs);
+int ui__popup_menu(int argc, char * const argv[], int *keyp);
+int ui__help_window(const char *text);
+int ui__dialog_yesno(const char *msg);
+void __ui__info_window(const char *title, const char *text, const char *exit_msg);
+void ui__info_window(const char *title, const char *text);
+int ui__question_window(const char *title, const char *text,
+			const char *exit_msg, int delay_secs);
+
+struct perf_error_ops {
+	int (*error)(const char *format, va_list args);
+	int (*warning)(const char *format, va_list args);
+};
+
+int perf_error__register(struct perf_error_ops *eops);
+int perf_error__unregister(struct perf_error_ops *eops);
+
+#endif /* _PERF_UI_UTIL_H_ */