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perf cs-etm: Make a helper to find the Coresight evsel 

This pattern occurs a few times and we'll add another one later, so add
a helper function for it.

Reviewed-by: Ian Rogers <irogers@google.com>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2026-01-14 15:57:22 +00:00 committed by Arnaldo Carvalho de Melo
parent 8e2ef85c66
commit 4c2efb230a
1 changed files with 27 additions and 23 deletions
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50
tools/perf/arch/arm/util/cs-etm.c
View File

@ -302,6 +302,19 @@ static int cs_etm_set_sink_attr(struct perf_pmu *pmu,
return 0;
}
static struct evsel *cs_etm_get_evsel(struct evlist *evlist,
struct perf_pmu *cs_etm_pmu)
{
struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type == cs_etm_pmu->type)
return evsel;
}
return NULL;
}
static int cs_etm_recording_options(struct auxtrace_record *itr,
struct evlist *evlist,
struct record_opts *opts)
@ -473,29 +486,21 @@ out:
static u64 cs_etm_get_config(struct auxtrace_record *itr)
{
u64 config = 0;
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct evlist *evlist = ptr->evlist;
struct evsel *evsel;
struct evsel *evsel = cs_etm_get_evsel(evlist, cs_etm_pmu);
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type == cs_etm_pmu->type) {
/*
* Variable perf_event_attr::config is assigned to
* ETMv3/PTM. The bit fields have been made to match
* the ETMv3.5 ETRMCR register specification. See the
* PMU_FORMAT_ATTR() declarations in
* drivers/hwtracing/coresight/coresight-perf.c for
* details.
*/
config = evsel->core.attr.config;
break;
}
}
return config;
/*
* Variable perf_event_attr::config is assigned to
* ETMv3/PTM. The bit fields have been made to match
* the ETMv3.5 ETRMCR register specification. See the
* PMU_FORMAT_ATTR() declarations in
* drivers/hwtracing/coresight/coresight-perf.c for
* details.
*/
return evsel ? evsel->core.attr.config : 0;
}
#ifndef BIT
@ -829,12 +834,11 @@ static int cs_etm_snapshot_start(struct auxtrace_record *itr)
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct evsel *evsel;
struct evsel *evsel = cs_etm_get_evsel(ptr->evlist, ptr->cs_etm_pmu);
if (evsel)
return evsel__disable(evsel);
evlist__for_each_entry(ptr->evlist, evsel) {
if (evsel->core.attr.type == ptr->cs_etm_pmu->type)
return evsel__disable(evsel);
}
return -EINVAL;
}