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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include "util/evsel.h"
#include "util/env.h"
#include "util/pmu.h"
#include "linux/string.h"
#include "evsel.h"
void arch_evsel__set_sample_weight(struct evsel *evsel)
{
evsel__set_sample_bit(evsel, WEIGHT_STRUCT);
}
void arch_evsel__fixup_new_cycles(struct perf_event_attr *attr)
{
struct perf_env env = { .total_mem = 0, } ;
if (!perf_env__cpuid(&env))
return;
/*
* On AMD, precise cycles event sampling internally uses IBS pmu.
* But IBS does not have filtering capabilities and perf by default
* sets exclude_guest = 1. This makes IBS pmu event init fail and
* thus perf ends up doing non-precise sampling. Avoid it by clearing
* exclude_guest.
*/
if (env.cpuid && strstarts(env.cpuid, "AuthenticAMD"))
attr->exclude_guest = 0;
free(env.cpuid);
}
/* Check whether the evsel's PMU supports the perf metrics */
bool evsel__sys_has_perf_metrics(const struct evsel *evsel)
{
const char *pmu_name = evsel->pmu_name ? evsel->pmu_name : "cpu";
/*
* The PERF_TYPE_RAW type is the core PMU type, e.g., "cpu" PMU
* on a non-hybrid machine, "cpu_core" PMU on a hybrid machine.
* The slots event is only available for the core PMU, which
* supports the perf metrics feature.
* Checking both the PERF_TYPE_RAW type and the slots event
* should be good enough to detect the perf metrics feature.
*/
if ((evsel->core.attr.type == PERF_TYPE_RAW) &&
pmu_have_event(pmu_name, "slots"))
return true;
return false;
}
bool arch_evsel__must_be_in_group(const struct evsel *evsel)
{
if (!evsel__sys_has_perf_metrics(evsel))
return false;
return evsel->name &&
(strcasestr(evsel->name, "slots") ||
strcasestr(evsel->name, "topdown"));
}
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