linux-kernel - [PATCH v1 1/3] perf header: Switch "cpu" for find_core

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Message-ID: <20251114220547.496562-1-irogers@google.com>
Date: Fri, 14 Nov 2025 14:05:45 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Howard Chu <howardchu95@...il.com>, 
	James Clark <james.clark@...aro.org>, Zhongqiu Han <quic_zhonhan@...cinc.com>, 
	Anubhav Shelat <ashelat@...hat.com>, Ravi Bangoria <ravi.bangoria@....com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/3] perf header: Switch "cpu" for find_core_pmu in caps
 feature writing

Writing currently fails on non-x86 and hybrid CPUs. Switch to the more
regular find_core_pmu that is normally used in this case. Tested on
hybrid alderlake system.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/header.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index a2f808841b33..e69b271f8073 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1560,7 +1560,7 @@ static int __write_pmu_caps(struct feat_fd *ff, struct perf_pmu *pmu,
 static int write_cpu_pmu_caps(struct feat_fd *ff,
 			      struct evlist *evlist __maybe_unused)
 {
-	struct perf_pmu *cpu_pmu = perf_pmus__find("cpu");
+	struct perf_pmu *cpu_pmu = perf_pmus__find_core_pmu();
 	int ret;
 
 	if (!cpu_pmu)
-- 
2.52.0.rc1.455.g30608eb744-goog