perf test: Update sysfs path for core PMU caps

[ Upstream commit b922881 ]

While CPU is a system device, it'd be better to use a path for
event_source devices when it checks PMU capability.

Reviewed-by: Ian Rogers <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Stable-dep-of: 48314d2 ("perf test shell lbr: Avoid failures with perf event paranoia")
Signed-off-by: Sasha Levin <[email protected]>

Author: namhyung

tools/perf/tests/shell/record_lbr.sh

@@ -4,7 +4,8 @@
 
 set -e
 
-if [ ! -f /sys/devices/cpu/caps/branches ] && [ ! -f /sys/devices/cpu_core/caps/branches ]
+if [ ! -f /sys/bus/event_source/devices/cpu/caps/branches ] &&
+   [ ! -f /sys/bus/event_source/devices/cpu_core/caps/branches ]
 then
   echo "Skip: only x86 CPUs support LBR"
   exit 2