Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 245 insertions, 0 deletions

diff --git a/tools/perf/tests/maps.c b/tools/perf/tests/maps.c
new file mode 100644
index 000000000..2c05d62f4
--- /dev/null
+++ b/tools/perf/tests/maps.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <inttypes.h>
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include "tests.h"
+#include "map.h"
+#include "maps.h"
+#include "dso.h"
+#include "debug.h"
+
+struct map_def {
+	const char *name;
+	u64 start;
+	u64 end;
+};
+
+struct check_maps_cb_args {
+	struct map_def *merged;
+	unsigned int i;
+};
+
+static int check_maps_cb(struct map *map, void *data)
+{
+	struct check_maps_cb_args *args = data;
+	struct map_def *merged = &args->merged[args->i];
+
+	if (map__start(map) != merged->start ||
+	    map__end(map) != merged->end ||
+	    strcmp(dso__name(map__dso(map)), merged->name) ||
+	    refcount_read(map__refcnt(map)) != 1) {
+		return 1;
+	}
+	args->i++;
+	return 0;
+}
+
+static int failed_cb(struct map *map, void *data __maybe_unused)
+{
+	pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
+		map__start(map),
+		map__end(map),
+		dso__name(map__dso(map)),
+		refcount_read(map__refcnt(map)));
+
+	return 0;
+}
+
+static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
+{
+	bool failed = false;
+
+	if (maps__nr_maps(maps) != size) {
+		pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
+		failed = true;
+	} else {
+		struct check_maps_cb_args args = {
+			.merged = merged,
+			.i = 0,
+		};
+		failed = maps__for_each_map(maps, check_maps_cb, &args);
+	}
+	if (failed) {
+		pr_debug("Expected:\n");
+		for (unsigned int i = 0; i < size; i++) {
+			pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
+				merged[i].start, merged[i].end, merged[i].name);
+		}
+		pr_debug("Got:\n");
+		maps__for_each_map(maps, failed_cb, NULL);
+	}
+	return failed ? TEST_FAIL : TEST_OK;
+}
+
+static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
+{
+	unsigned int i;
+	struct map_def bpf_progs[] = {
+		{ "bpf_prog_1", 200, 300 },
+		{ "bpf_prog_2", 500, 600 },
+		{ "bpf_prog_3", 800, 900 },
+	};
+	struct map_def merged12[] = {
+		{ "kcore1",     100,  200 },
+		{ "bpf_prog_1", 200,  300 },
+		{ "kcore1",     300,  500 },
+		{ "bpf_prog_2", 500,  600 },
+		{ "kcore1",     600,  800 },
+		{ "bpf_prog_3", 800,  900 },
+		{ "kcore1",     900, 1000 },
+	};
+	struct map_def merged3[] = {
+		{ "kcore1",      100,  200 },
+		{ "bpf_prog_1",  200,  300 },
+		{ "kcore1",      300,  500 },
+		{ "bpf_prog_2",  500,  600 },
+		{ "kcore1",      600,  800 },
+		{ "bpf_prog_3",  800,  900 },
+		{ "kcore1",      900, 1000 },
+		{ "kcore3",     1000, 1100 },
+	};
+	struct map *map_kcore1, *map_kcore2, *map_kcore3;
+	int ret;
+	struct maps *maps = maps__new(NULL);
+
+	TEST_ASSERT_VAL("failed to create maps", maps);
+
+	for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
+		struct map *map;
+
+		map = dso__new_map(bpf_progs[i].name);
+		TEST_ASSERT_VAL("failed to create map", map);
+
+		map__set_start(map, bpf_progs[i].start);
+		map__set_end(map, bpf_progs[i].end);
+		TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
+		map__put(map);
+	}
+
+	map_kcore1 = dso__new_map("kcore1");
+	TEST_ASSERT_VAL("failed to create map", map_kcore1);
+
+	map_kcore2 = dso__new_map("kcore2");
+	TEST_ASSERT_VAL("failed to create map", map_kcore2);
+
+	map_kcore3 = dso__new_map("kcore3");
+	TEST_ASSERT_VAL("failed to create map", map_kcore3);
+
+	/* kcore1 map overlaps over all bpf maps */
+	map__set_start(map_kcore1, 100);
+	map__set_end(map_kcore1, 1000);
+
+	/* kcore2 map hides behind bpf_prog_2 */
+	map__set_start(map_kcore2, 550);
+	map__set_end(map_kcore2, 570);
+
+	/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
+	map__set_start(map_kcore3, 880);
+	map__set_end(map_kcore3, 1100);
+
+	ret = maps__merge_in(maps, map_kcore1);
+	TEST_ASSERT_VAL("failed to merge map", !ret);
+
+	ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
+	TEST_ASSERT_VAL("merge check failed", !ret);
+
+	ret = maps__merge_in(maps, map_kcore2);
+	TEST_ASSERT_VAL("failed to merge map", !ret);
+
+	ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
+	TEST_ASSERT_VAL("merge check failed", !ret);
+
+	ret = maps__merge_in(maps, map_kcore3);
+	TEST_ASSERT_VAL("failed to merge map", !ret);
+
+	ret = check_maps(merged3, ARRAY_SIZE(merged3), maps);
+	TEST_ASSERT_VAL("merge check failed", !ret);
+
+	maps__zput(maps);
+	map__zput(map_kcore1);
+	map__zput(map_kcore2);
+	map__zput(map_kcore3);
+	return TEST_OK;
+}
+
+static int test__maps__fixup_overlap_and_insert(struct test_suite *t __maybe_unused,
+						int subtest __maybe_unused)
+{
+	struct map_def initial_maps[] = {
+		{ "target_map", 1000, 2000 },
+		{ "next_map",   3000, 4000 },
+	};
+	struct map_def insert_split = { "split_map", 1400, 1600 };
+	struct map_def expected_after_split[] = {
+		{ "target_map", 1000, 1400 },
+		{ "split_map",  1400, 1600 },
+		{ "target_map", 1600, 2000 },
+		{ "next_map",   3000, 4000 },
+	};
+
+	struct map_def insert_eclipse = { "eclipse_map", 2500, 4500 };
+	struct map_def expected_final[] = {
+		{ "target_map",  1000, 1400 },
+		{ "split_map",   1400, 1600 },
+		{ "target_map",  1600, 2000 },
+		{ "eclipse_map", 2500, 4500 },
+		/* "next_map" (3000-4000) is removed */
+	};
+
+	struct map *map_split, *map_eclipse;
+	int ret;
+	unsigned int i;
+	struct maps *maps = maps__new(NULL);
+
+	TEST_ASSERT_VAL("failed to create maps", maps);
+
+	for (i = 0; i < ARRAY_SIZE(initial_maps); i++) {
+		struct map *map = dso__new_map(initial_maps[i].name);
+
+		TEST_ASSERT_VAL("failed to create map", map);
+		map__set_start(map, initial_maps[i].start);
+		map__set_end(map, initial_maps[i].end);
+		TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
+		map__put(map);
+	}
+
+	// Check splitting.
+	map_split = dso__new_map(insert_split.name);
+	TEST_ASSERT_VAL("failed to create split map", map_split);
+	map__set_start(map_split, insert_split.start);
+	map__set_end(map_split, insert_split.end);
+
+	ret = maps__fixup_overlap_and_insert(maps, map_split);
+	TEST_ASSERT_VAL("failed to fixup and insert split map", !ret);
+
+	map__zput(map_split);
+	ret = check_maps(expected_after_split, ARRAY_SIZE(expected_after_split), maps);
+	TEST_ASSERT_VAL("split check failed", !ret);
+
+	// Check cover 1 map with another.
+	map_eclipse = dso__new_map(insert_eclipse.name);
+	TEST_ASSERT_VAL("failed to create eclipse map", map_eclipse);
+	map__set_start(map_eclipse, insert_eclipse.start);
+	map__set_end(map_eclipse, insert_eclipse.end);
+
+	ret = maps__fixup_overlap_and_insert(maps, map_eclipse);
+	TEST_ASSERT_VAL("failed to fixup and insert eclipse map", !ret);
+
+	map__zput(map_eclipse);
+	ret = check_maps(expected_final, ARRAY_SIZE(expected_final), maps);
+	TEST_ASSERT_VAL("eclipse check failed", !ret);
+
+	maps__zput(maps);
+	return TEST_OK;
+}
+
+static struct test_case tests__maps[] = {
+	TEST_CASE("Test merge_in interface", maps__merge_in),
+	TEST_CASE("Test fix up overlap interface", maps__fixup_overlap_and_insert),
+	{	.name = NULL, }
+};
+
+struct test_suite suite__maps = {
+	.desc = "Maps - per process mmaps abstraction",
+	.test_cases = tests__maps,
+};