perf intel-tpebs: Move the cpumap_buf variable out of evsel__tpebs_open()

The buffer holds the cpumap to pass to the 'perf record' command, so
move it down to the 'perf record' function.

Make this function an evsel function given the need for the evsel for
the cpumap.

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Weilin Wang <weilin.wang@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andreas Färber <afaerber@suse.de>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Link: https://lore.kernel.org/r/20250414174134.3095492-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/tools/perf/util/intel-tpebs.c b/tools/perf/util/intel-tpebs.c
index 2186818b2c9b..2b04deaf66ff 100644
--- a/tools/perf/util/intel-tpebs.c
+++ b/tools/perf/util/intel-tpebs.c
@@ -83,12 +83,15 @@ static int get_perf_record_args(const char **record_argv, char buf[],
 	return 0;
 }
 
-static int start_perf_record(int control_fd[], int ack_fd[],
-				const char *cpumap_buf)
+static int evsel__tpebs_start_perf_record(struct evsel *evsel, int control_fd[], int ack_fd[])
 {
 	const char **record_argv;
 	int ret;
 	char buf[32];
+	char cpumap_buf[50];
+
+	cpu_map__snprint(evsel->evlist->core.user_requested_cpus, cpumap_buf,
+			 sizeof(cpumap_buf));
 
 	scnprintf(buf, sizeof(buf), "--control=fd:%d,%d", control_fd[0], ack_fd[1]);
 
@@ -287,8 +290,6 @@ int evsel__tpebs_open(struct evsel *evsel)
 		return ret;
 
 	if (tpebs_event_size > 0) {
-		struct evlist *evsel_list = evsel->evlist;
-		char cpumap_buf[50];
 		struct pollfd pollfd = { .events = POLLIN, };
 		int control_fd[2], ack_fd[2], len;
 		char ack_buf[8];
@@ -305,10 +306,7 @@ int evsel__tpebs_open(struct evsel *evsel)
 			goto out;
 		}
 
-		cpu_map__snprint(evsel_list->core.user_requested_cpus, cpumap_buf,
-				 sizeof(cpumap_buf));
-
-		ret = start_perf_record(control_fd, ack_fd, cpumap_buf);
+		ret = evsel__tpebs_start_perf_record(evsel, control_fd, ack_fd);
 		if (ret)
 			goto out;