coresight: pmu: Adds return stack option to perf coresight pmu
Return stack is a programmable option on some ETM and PTM hardware.
Adds the option flags to enable this from the perf event command line.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/coresight-pmu.h b/include/linux/coresight-pmu.h
index 7d41026..45852c2 100644
--- a/include/linux/coresight-pmu.h
+++ b/include/linux/coresight-pmu.h
@@ -24,6 +24,7 @@
/* ETMv3.5/PTM's ETMCR config bit */
#define ETM_OPT_CYCACC 12
#define ETM_OPT_TS 28
+#define ETM_OPT_RETSTK 29
static inline int coresight_get_trace_id(int cpu)
{