[RFC PATCH v2 13/13] perf metricgroup: Support adding metrics for system PMUs

[John Garry <john.garry@huawei.com>]

Currently only adding metrics for core- or uncore-based events is
supported. Extend this for system events.

Signed-off-by: John Garry <john.garry@huawei.com>
---
 tools/perf/util/metricgroup.c | 40 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 81a6aa04a601..85bf5333e4c6 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -593,17 +593,34 @@ static int metricgroup__add_metric_pmu_event(struct pmu_event *pe,
 	return 0;
 }
 
+struct metricgroup_add_iter_data {
+	const char *metric;
+	struct strbuf *events;
+	struct list_head *group_list;
+	int *ret;
+};
+
+static int metricgroup__add_metric_sys_event_iter(struct pmu_event *pe,
+						  void *data)
+{
+	struct metricgroup_add_iter_data *d = data;
+
+	if (!match_pe_metric(pe, d->metric))
+		return 0;
+
+	return (*d->ret = metricgroup__add_metric_pmu_event(pe, d->events,
+							    d->group_list));
+}
+
 static int metricgroup__add_metric(const char *metric, struct strbuf *events,
 				   struct list_head *group_list)
 {
 	struct pmu_events_map *map = perf_pmu__find_map(NULL);
+	struct perf_pmu *pmu = NULL;
 	struct pmu_event *pe;
 	int i, ret = -EINVAL;
 
-	if (!map)
-		return 0;
-
-	for (i = 0; ; i++) {
+	for (i = 0; map; i++) {
 		pe = &map->table[i];
 
 		if (!pe->name && !pe->metric_group && !pe->metric_name)
@@ -618,6 +635,21 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
 				return ret;
 		}
 	}
+
+	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+		struct metricgroup_iter_data data = {
+			.fn = metricgroup__add_metric_sys_event_iter,
+			.data = (void *) &(struct metricgroup_add_iter_data){
+				.metric = metric,
+				.events = events,
+				.group_list = group_list,
+				.ret = &ret,
+			},
+		};
+
+		pmu_for_each_sys_event(pmu, metricgroup__sys_event_iter, &data);
+	}
+
 	return ret;
 }
 
-- 
2.16.4