[PATCH 15/57] perf tools: Add stat event read function

[Jiri Olsa <jolsa@kernel.org>]

Introducing perf_event__process_stat_event function to process
'struct perf_stat' data from stat event.

Link: http://lkml.kernel.org/n/tip-2bvpxxp60e0qqcsecohgeju3@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/stat.c | 23 +++++++++++++++++++++++
 tools/perf/util/stat.h |  6 ++++++
 2 files changed, 29 insertions(+)

diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 2d065d065b67..0369b4516c29 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -340,3 +340,26 @@ int perf_stat_process_counter(struct perf_stat_config *config,
 
 	return 0;
 }
+
+int perf_event__process_stat_event(struct perf_tool *tool __maybe_unused,
+				   union perf_event *event,
+				   struct perf_session *session)
+{
+	struct perf_counts_values count;
+	struct stat_event *stat = &event->stat;
+	struct perf_evsel *counter;
+
+	count.val = stat->val;
+	count.ena = stat->ena;
+	count.run = stat->run;
+
+	counter = perf_evlist__id2evsel(session->evlist, stat->id);
+	if (!counter) {
+		pr_err("Failed to resolve counter for stat event.\n");
+		return -EINVAL;
+	}
+
+	*perf_counts(counter->counts, stat->cpu, stat->thread) = count;
+	counter->supported = true;
+	return 0;
+}
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 62448c8175d3..a61cb0a9f23a 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -89,4 +89,10 @@ void perf_evlist__reset_stats(struct perf_evlist *evlist);
 
 int perf_stat_process_counter(struct perf_stat_config *config,
 			      struct perf_evsel *counter);
+struct perf_tool;
+union perf_event;
+struct perf_session;
+int perf_event__process_stat_event(struct perf_tool *tool,
+				   union perf_event *event,
+				   struct perf_session *session);
 #endif
-- 
2.4.3