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1// SPDX-License-Identifier: GPL-2.02#include "api/fs/fs.h"3#include "util/evsel.h"4#include "util/pmu.h"5#include "util/pmus.h"6#include "util/topdown.h"7#include "topdown.h"8#include "evsel.h"9 10/* Check whether there is a PMU which supports the perf metrics. */11bool topdown_sys_has_perf_metrics(void)12{13 static bool has_perf_metrics;14 static bool cached;15 struct perf_pmu *pmu;16 17 if (cached)18 return has_perf_metrics;19 20 /*21 * The perf metrics feature is a core PMU feature.22 * The PERF_TYPE_RAW type is the type of a core PMU.23 * The slots event is only available when the core PMU24 * supports the perf metrics feature.25 */26 pmu = perf_pmus__find_by_type(PERF_TYPE_RAW);27 if (pmu && perf_pmu__have_event(pmu, "slots"))28 has_perf_metrics = true;29 30 cached = true;31 return has_perf_metrics;32}33 34#define TOPDOWN_SLOTS 0x040035 36/*37 * Check whether a topdown group supports sample-read.38 *39 * Only Topdown metric supports sample-read. The slots40 * event must be the leader of the topdown group.41 */42bool arch_topdown_sample_read(struct evsel *leader)43{44 if (!evsel__sys_has_perf_metrics(leader))45 return false;46 47 if (leader->core.attr.config == TOPDOWN_SLOTS)48 return true;49 50 return false;51}52