From: Ian Rogers <irogers@google.com>
Date: Thu, 5 Feb 2026 18:36:03 +0000 (-0800)
Subject: perf metricgroup: Don't early exit if no CPUID table exists
X-Git-Tag: v7.0-rc1~16^2~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cee275edcdb1acfdc8270f80e96f30750b633220;p=thirdparty%2Fkernel%2Fstable.git

perf metricgroup: Don't early exit if no CPUID table exists

The failure to find a table of metrics with a CPUID shouldn't early
exit as the metric code will now also consider the default table.

When searching for a metric or metric group,
pmu_metrics_table__for_each_metric() considers all tables and so the
caller doesn't need to switch the table to do this.

Fixes: c7adeb0974f18da4 ("perf jevents: Add set of common metrics based on default ones")
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Leo Yan <leo.yan@arm.com>
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: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 40a1e14de4189..46bf4dfeebc8c 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -1562,8 +1562,6 @@ int metricgroup__parse_groups(struct evlist *perf_evlist,
 {
 	const struct pmu_metrics_table *table = pmu_metrics_table__find();
 
-	if (!table)
-		return -EINVAL;
 	if (hardware_aware_grouping)
 		pr_debug("Use hardware aware grouping instead of traditional metric grouping method\n");
 
@@ -1601,22 +1599,16 @@ static int metricgroup__has_metric_or_groups_callback(const struct pmu_metric *p
 
 bool metricgroup__has_metric_or_groups(const char *pmu, const char *metric_or_groups)
 {
-	const struct pmu_metrics_table *tables[2] = {
-		pmu_metrics_table__find(),
-		pmu_metrics_table__default(),
-	};
+	const struct pmu_metrics_table *table = pmu_metrics_table__find();
 	struct metricgroup__has_metric_data data = {
 		.pmu = pmu,
 		.metric_or_groups = metric_or_groups,
 	};
 
-	for (size_t i = 0; i < ARRAY_SIZE(tables); i++) {
-		if (pmu_metrics_table__for_each_metric(tables[i],
-							metricgroup__has_metric_or_groups_callback,
-							&data))
-			return true;
-	}
-	return false;
+	return pmu_metrics_table__for_each_metric(table,
+						  metricgroup__has_metric_or_groups_callback,
+						  &data)
+		? true : false;
 }
 
 static int metricgroup__topdown_max_level_callback(const struct pmu_metric *pm,