[PATCH] perf test: Record kcore for the CoreSight callchain test

[Leo Yan]

The CoreSight callchain test traces both userspace and kernel execution
and checks the callchain across a syscall.

Add --kcore to perf record to save the running kernel image alongside
the trace data so perf script can use it to decode the kernel trace.

Add a Fixes tag so the change can be backported to stable kernels and
improve the test reliability.

Fixes: ca0e19074bd6 ("perf test: Add Arm CoreSight callchain test")
Signed-off-by: Leo Yan <leo.yan at arm.com>
---
 tools/perf/tests/shell/coresight/callchain.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/coresight/callchain.sh b/tools/perf/tests/shell/coresight/callchain.sh
index 13cca7dc1118..b69187f1a37f 100755
--- a/tools/perf/tests/shell/coresight/callchain.sh
+++ b/tools/perf/tests/shell/coresight/callchain.sh
@@ -43,7 +43,7 @@ record_trace()
 
 	mkfifo "$cf" "$af"
 
-	perf record -o "$data" -e cs_etm// --per-thread -D -1 --control fifo:"$cf","$af" -- \
+	perf record --kcore -o "$data" -e cs_etm// --per-thread -D -1 --control fifo:"$cf","$af" -- \
 		perf test --record-ctl fifo:"$cf","$af" -w callchain >/dev/null 2>&1 &&
 
 	# It is safe to use 'i3i' with a three-instruction interval, since the
-- 
2.34.1