linux-kernel - [PATCH v5 07/16] perf kvm: Pass argument 'sample' to kvm_alloc_init

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Date:   Wed, 15 Mar 2023 22:51:03 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.g.garry@...cle.com>,
        James Clark <james.clark@....com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v5 07/16] perf kvm: Pass argument 'sample' to kvm_alloc_init_event()

This patch adds an argument 'sample' for kvm_alloc_init_event(), and its
caller functions are updated as well for passing down the 'sample'
pointer.

This is a preparation change to allow later patch to create histograms
entries for kvm event, no any functionality changes.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
Reviewed-by: James Clark <james.clark@....com>
---
 tools/perf/builtin-kvm.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 384992c8a01a..5ea723fd45a4 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -260,7 +260,8 @@ static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
 }
 
 static struct kvm_event *kvm_alloc_init_event(struct perf_kvm_stat *kvm,
-					      struct event_key *key)
+					      struct event_key *key,
+					      struct perf_sample *sample __maybe_unused)
 {
 	struct kvm_event *event;
 
@@ -277,7 +278,8 @@ static struct kvm_event *kvm_alloc_init_event(struct perf_kvm_stat *kvm,
 }
 
 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
-					       struct event_key *key)
+					       struct event_key *key,
+					       struct perf_sample *sample)
 {
 	struct kvm_event *event;
 	struct list_head *head;
@@ -290,7 +292,7 @@ static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
 			return event;
 	}
 
-	event = kvm_alloc_init_event(kvm, key);
+	event = kvm_alloc_init_event(kvm, key, sample);
 	if (!event)
 		return NULL;
 
@@ -300,15 +302,16 @@ static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
 
 static bool handle_begin_event(struct perf_kvm_stat *kvm,
 			       struct vcpu_event_record *vcpu_record,
-			       struct event_key *key, u64 timestamp)
+			       struct event_key *key,
+			       struct perf_sample *sample)
 {
 	struct kvm_event *event = NULL;
 
 	if (key->key != INVALID_KEY)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	vcpu_record->last_event = event;
-	vcpu_record->start_time = timestamp;
+	vcpu_record->start_time = sample->time;
 	return true;
 }
 
@@ -375,12 +378,12 @@ static bool is_child_event(struct perf_kvm_stat *kvm,
 static bool handle_child_event(struct perf_kvm_stat *kvm,
 			       struct vcpu_event_record *vcpu_record,
 			       struct event_key *key,
-			       struct perf_sample *sample __maybe_unused)
+			       struct perf_sample *sample)
 {
 	struct kvm_event *event = NULL;
 
 	if (key->key != INVALID_KEY)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	vcpu_record->last_event = event;
 
@@ -429,7 +432,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
 		return true;
 
 	if (!event)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	if (!event)
 		return false;
@@ -500,7 +503,7 @@ static bool handle_kvm_event(struct perf_kvm_stat *kvm,
 		return true;
 
 	if (kvm->events_ops->is_begin_event(evsel, sample, &key))
-		return handle_begin_event(kvm, vcpu_record, &key, sample->time);
+		return handle_begin_event(kvm, vcpu_record, &key, sample);
 
 	if (is_child_event(kvm, evsel, sample, &key))
 		return handle_child_event(kvm, vcpu_record, &key, sample);
-- 
2.34.1