From b97971bee55dc45420e0fe352d0b4df6e74716d4 Mon Sep 17 00:00:00 2001 From: Mike Leach Date: Wed, 2 Aug 2017 10:22:01 -0600 Subject: [PATCH] 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 Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/coresight/coresight-etm-perf.c | 2 ++ include/linux/coresight-pmu.h | 1 + tools/include/linux/coresight-pmu.h | 1 + 3 files changed, 4 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index ad01dfeb2d68..8a0ad77574e7 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -53,10 +53,12 @@ static DEFINE_PER_CPU(struct coresight_device *, csdev_src); /* ETMv3.5/PTM's ETMCR is 'config' */ PMU_FORMAT_ATTR(cycacc, "config:" __stringify(ETM_OPT_CYCACC)); PMU_FORMAT_ATTR(timestamp, "config:" __stringify(ETM_OPT_TS)); +PMU_FORMAT_ATTR(retstack, "config:" __stringify(ETM_OPT_RETSTK)); static struct attribute *etm_config_formats_attr[] = { &format_attr_cycacc.attr, &format_attr_timestamp.attr, + &format_attr_retstack.attr, NULL, }; diff --git a/include/linux/coresight-pmu.h b/include/linux/coresight-pmu.h index 7d410260661b..45852c2cd096 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) { diff --git a/tools/include/linux/coresight-pmu.h b/tools/include/linux/coresight-pmu.h index 7d410260661b..45852c2cd096 100644 --- a/tools/include/linux/coresight-pmu.h +++ b/tools/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) { -- 2.20.1