Commit b97971be authored by Mike Leach's avatar Mike Leach Committed by Greg Kroah-Hartman
Browse files

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: default avatarMike Leach <mike.leach@linaro.org>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 89f00a1a

drivers/hwtracing/coresight/coresight-etm-perf.c

+2 −0
Original line number Diff line number Diff line
@@ -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,

};

include/linux/coresight-pmu.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

{

tools/include/linux/coresight-pmu.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE