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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>
This commit is contained in:
Mike Leach 2017-08-02 10:22:01 -06:00 committed by Greg Kroah-Hartman
parent 89f00a1ae5
commit b97971bee5
3 changed files with 4 additions and 0 deletions
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2
drivers/hwtracing/coresight/coresight-etm-perf.c
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@ -53,10 +53,12 @@ static DEFINE_PER_CPU(struct coresight_device *, csdev_src);
/* ETMv3.5/PTM's ETMCR is 'config' */ /* ETMv3.5/PTM's ETMCR is 'config' */
PMU_FORMAT_ATTR(cycacc, "config:" __stringify(ETM_OPT_CYCACC)); PMU_FORMAT_ATTR(cycacc, "config:" __stringify(ETM_OPT_CYCACC));
PMU_FORMAT_ATTR(timestamp, "config:" __stringify(ETM_OPT_TS)); 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[] = { static struct attribute *etm_config_formats_attr[] = {
&format_attr_cycacc.attr, &format_attr_cycacc.attr,
&format_attr_timestamp.attr, &format_attr_timestamp.attr,
&format_attr_retstack.attr,
NULL, NULL,
}; };

1
include/linux/coresight-pmu.h
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@ -24,6 +24,7 @@
/* ETMv3.5/PTM's ETMCR config bit */ /* ETMv3.5/PTM's ETMCR config bit */
#define ETM_OPT_CYCACC 12 #define ETM_OPT_CYCACC 12
#define ETM_OPT_TS 28 #define ETM_OPT_TS 28
#define ETM_OPT_RETSTK 29
static inline int coresight_get_trace_id(int cpu) static inline int coresight_get_trace_id(int cpu)
{ {

1
tools/include/linux/coresight-pmu.h
View File

@ -24,6 +24,7 @@
/* ETMv3.5/PTM's ETMCR config bit */ /* ETMv3.5/PTM's ETMCR config bit */
#define ETM_OPT_CYCACC 12 #define ETM_OPT_CYCACC 12
#define ETM_OPT_TS 28 #define ETM_OPT_TS 28
#define ETM_OPT_RETSTK 29
static inline int coresight_get_trace_id(int cpu) static inline int coresight_get_trace_id(int cpu)
{ {