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.
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-kvm.c

@@ -262,7 +262,8 @@ 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;
 
@@ -279,7 +280,8 @@ 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;
@@ -292,7 +294,7 @@ 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;
 
@@ -302,15 +304,16 @@ 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;
 }
 
@@ -377,12 +380,12 @@ 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;
 
@@ -431,7 +434,7 @@ 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;
@@ -502,7 +505,7 @@ 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);