linux-kernel - [PATCH RFC 05/21] perf auxtrace: Do not mix up mmap idx

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Message-Id: <20220422162402.147958-6-adrian.hunter@intel.com>
Date:   Fri, 22 Apr 2022 19:23:46 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Ian Rogers <irogers@...gle.com>,
        Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Leo Yan <leo.yan@...aro.org>, linux-kernel@...r.kernel.org
Subject: [PATCH RFC 05/21] perf auxtrace: Do not mix up mmap idx

The idx is with respect to evlist not evsel. That hasn't mattered because
they are the same at present. Prepare for that not being the case, which it
won't be when sideband tracking events are allowed on all CPUs even when
auxtrace is limited to selected CPUs.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/auxtrace.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index 10936a38031f..2d015b0be549 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -640,8 +640,14 @@ static int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel,
 {
 	bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.user_requested_cpus);
 
-	if (per_cpu_mmaps)
-		return perf_evsel__enable_cpu(&evsel->core, idx);
+	if (per_cpu_mmaps) {
+		struct perf_cpu evlist_cpu = perf_cpu_map__cpu(evlist->core.all_cpus, idx);
+		int cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu);
+
+		if (cpu == -1)
+			return -EINVAL;
+		return perf_evsel__enable_cpu(&evsel->core, cpu);
+	}
 
 	return perf_evsel__enable_thread(&evsel->core, idx);
 }
-- 
2.25.1