KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted

Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.

Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 280 insertions, 0 deletions

diff --git a/include/trace/events/asoc.h b/include/trace/events/asoc.h
new file mode 100644
index 000000000..4a6455491
--- /dev/null
+++ b/include/trace/events/asoc.h
@@ -0,0 +1,280 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM asoc
+
+#if !defined(_TRACE_ASOC_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_ASOC_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+
+#define DAPM_DIRECT "(direct)"
+#define DAPM_ARROW(dir) (((dir) == SND_SOC_DAPM_DIR_OUT) ? "->" : "<-")
+
+TRACE_DEFINE_ENUM(SND_SOC_DAPM_DIR_OUT);
+
+struct snd_soc_jack;
+struct snd_soc_card;
+struct snd_soc_dapm_widget;
+struct snd_soc_dapm_path;
+
+DECLARE_EVENT_CLASS(snd_soc_dapm,
+
+	TP_PROTO(struct snd_soc_dapm_context *dapm, int val),
+
+	TP_ARGS(dapm, val),
+
+	TP_STRUCT__entry(
+		__string(	card_name,	snd_soc_dapm_to_card(dapm)->name)
+		__string(	comp_name,	snd_soc_dapm_to_component(dapm) ? snd_soc_dapm_to_component(dapm)->name : "(none)")
+		__field(	int,		val)
+	),
+
+	TP_fast_assign(
+		__assign_str(card_name);
+		__assign_str(comp_name);
+		__entry->val = val;
+	),
+
+	TP_printk("card=%s component=%s val=%d",
+		  __get_str(card_name), __get_str(comp_name), (int)__entry->val)
+);
+
+DEFINE_EVENT(snd_soc_dapm, snd_soc_bias_level_start,
+
+	TP_PROTO(struct snd_soc_dapm_context *dapm, int val),
+
+	TP_ARGS(dapm, val)
+
+);
+
+DEFINE_EVENT(snd_soc_dapm, snd_soc_bias_level_done,
+
+	TP_PROTO(struct snd_soc_dapm_context *dapm, int val),
+
+	TP_ARGS(dapm, val)
+
+);
+
+DECLARE_EVENT_CLASS(snd_soc_dapm_basic,
+
+	TP_PROTO(struct snd_soc_card *card, int event),
+
+	TP_ARGS(card, event),
+
+	TP_STRUCT__entry(
+		__string(	name,	card->name	)
+		__field(	int,	event		)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->event = event;
+	),
+
+	TP_printk("card=%s event=%d", __get_str(name), (int)__entry->event)
+);
+
+DEFINE_EVENT(snd_soc_dapm_basic, snd_soc_dapm_start,
+
+	TP_PROTO(struct snd_soc_card *card, int event),
+
+	TP_ARGS(card, event)
+
+);
+
+DEFINE_EVENT(snd_soc_dapm_basic, snd_soc_dapm_done,
+
+	TP_PROTO(struct snd_soc_card *card, int event),
+
+	TP_ARGS(card, event)
+
+);
+
+DECLARE_EVENT_CLASS(snd_soc_dapm_widget,
+
+	TP_PROTO(struct snd_soc_dapm_widget *w, int val),
+
+	TP_ARGS(w, val),
+
+	TP_STRUCT__entry(
+		__string(	name,	w->name		)
+		__field(	int,	val		)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->val = val;
+	),
+
+	TP_printk("widget=%s val=%d", __get_str(name),
+		  (int)__entry->val)
+);
+
+DEFINE_EVENT(snd_soc_dapm_widget, snd_soc_dapm_widget_power,
+
+	TP_PROTO(struct snd_soc_dapm_widget *w, int val),
+
+	TP_ARGS(w, val)
+
+);
+
+DEFINE_EVENT(snd_soc_dapm_widget, snd_soc_dapm_widget_event_start,
+
+	TP_PROTO(struct snd_soc_dapm_widget *w, int val),
+
+	TP_ARGS(w, val)
+
+);
+
+DEFINE_EVENT(snd_soc_dapm_widget, snd_soc_dapm_widget_event_done,
+
+	TP_PROTO(struct snd_soc_dapm_widget *w, int val),
+
+	TP_ARGS(w, val)
+
+);
+
+TRACE_EVENT(snd_soc_dapm_walk_done,
+
+	TP_PROTO(struct snd_soc_card *card),
+
+	TP_ARGS(card),
+
+	TP_STRUCT__entry(
+		__string(	name,	card->name		)
+		__field(	int,	power_checks		)
+		__field(	int,	path_checks		)
+		__field(	int,	neighbour_checks	)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->power_checks = card->dapm_stats.power_checks;
+		__entry->path_checks = card->dapm_stats.path_checks;
+		__entry->neighbour_checks = card->dapm_stats.neighbour_checks;
+	),
+
+	TP_printk("%s: checks %d power, %d path, %d neighbour",
+		  __get_str(name), (int)__entry->power_checks,
+		  (int)__entry->path_checks, (int)__entry->neighbour_checks)
+);
+
+TRACE_EVENT(snd_soc_dapm_path,
+
+	TP_PROTO(struct snd_soc_dapm_widget *widget,
+		enum snd_soc_dapm_direction dir,
+		struct snd_soc_dapm_path *path),
+
+	TP_ARGS(widget, dir, path),
+
+	TP_STRUCT__entry(
+		__string(	wname,	widget->name		)
+		__string(	pname,	path->name ? path->name : DAPM_DIRECT)
+		__string(	pnname,	path->node[dir]->name	)
+		__field(	int,	path_node		)
+		__field(	int,	path_connect		)
+		__field(	int,	path_dir		)
+	),
+
+	TP_fast_assign(
+		__assign_str(wname);
+		__assign_str(pname);
+		__assign_str(pnname);
+		__entry->path_connect = path->connect;
+		__entry->path_node = (long)path->node[dir];
+		__entry->path_dir = dir;
+	),
+
+	TP_printk("%c%s %s %s %s %s",
+		(int) __entry->path_node &&
+		(int) __entry->path_connect ? '*' : ' ',
+		__get_str(wname), DAPM_ARROW(__entry->path_dir),
+		__get_str(pname), DAPM_ARROW(__entry->path_dir),
+		__get_str(pnname))
+);
+
+TRACE_EVENT(snd_soc_dapm_connected,
+
+	TP_PROTO(int paths, int stream),
+
+	TP_ARGS(paths, stream),
+
+	TP_STRUCT__entry(
+		__field(	int,	paths		)
+		__field(	int,	stream		)
+	),
+
+	TP_fast_assign(
+		__entry->paths = paths;
+		__entry->stream = stream;
+	),
+
+	TP_printk("%s: found %d paths",
+		  snd_pcm_direction_name(__entry->stream), __entry->paths)
+);
+
+TRACE_EVENT(snd_soc_jack_irq,
+
+	TP_PROTO(const char *name),
+
+	TP_ARGS(name),
+
+	TP_STRUCT__entry(
+		__string(	name,	name		)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+	),
+
+	TP_printk("%s", __get_str(name))
+);
+
+TRACE_EVENT(snd_soc_jack_report,
+
+	TP_PROTO(struct snd_soc_jack *jack, int mask, int val),
+
+	TP_ARGS(jack, mask, val),
+
+	TP_STRUCT__entry(
+		__string(	name,		jack->jack->id		)
+		__field(	int,		mask			)
+		__field(	int,		val			)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->mask = mask;
+		__entry->val = val;
+	),
+
+	TP_printk("jack=%s %x/%x", __get_str(name), (int)__entry->val,
+		  (int)__entry->mask)
+);
+
+TRACE_EVENT(snd_soc_jack_notify,
+
+	TP_PROTO(struct snd_soc_jack *jack, int val),
+
+	TP_ARGS(jack, val),
+
+	TP_STRUCT__entry(
+		__string(	name,		jack->jack->id		)
+		__field(	int,		val			)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->val = val;
+	),
+
+	TP_printk("jack=%s %x", __get_str(name), (int)__entry->val)
+);
+
+#endif /* _TRACE_ASOC_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>