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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 "linux/string.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);
}
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