perf pmu: Only warn about unsupported formats once

Avoid scanning format list for each event parsed.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20230601023644.587584-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/pmu.c

@@ -934,6 +934,11 @@ void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu)
 {
 	struct perf_pmu_format *format;
 
+	if (pmu->formats_checked)
+		return;
+
+	pmu->formats_checked = true;
+
 	/* fake pmu doesn't have format list */
 	if (pmu == &perf_pmu__fake)
 		return;

tools/perf/util/pmu.h

@@ -76,6 +76,11 @@ struct perf_pmu {
 	 * specific code.
 	 */
 	bool auxtrace;
+	/**
+	 * @formats_checked: Only check PMU's formats are valid for
+	 * perf_event_attr once.
+	 */
+	bool formats_checked;
 	/**
 	 * @max_precise: Number of levels of :ppp precision supported by the
 	 * PMU, read from