diff options
Diffstat (limited to 'tools/perf/util/pmu.c')
| -rw-r--r-- | tools/perf/util/pmu.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index d41caeb35cf6..cbeda45ce578 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -597,6 +597,7 @@ static struct perf_cpu_map *__pmu_cpumask(const char *path) * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) * may have a "cpus" file. */ +#define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier" #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask" #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus" @@ -635,6 +636,21 @@ static bool pmu_is_uncore(const char *name) return file_available(path); } +static char *pmu_id(const char *name) +{ + char path[PATH_MAX], *str; + size_t len; + + snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name); + + if (sysfs__read_str(path, &str, &len) < 0) + return NULL; + + str[len - 1] = 0; /* remove line feed */ + + return str; +} + /* * PMU CORE devices have different name other than cpu in sysfs on some * platforms. @@ -847,6 +863,8 @@ static struct perf_pmu *pmu_lookup(const char *name) pmu->name = strdup(name); pmu->type = type; pmu->is_uncore = pmu_is_uncore(name); + if (pmu->is_uncore) + pmu->id = pmu_id(name); pmu->max_precise = pmu_max_precise(name); pmu_add_cpu_aliases(&aliases, pmu); |