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authorMike Leach <mike.leach@linaro.org>2017-08-02 10:22:01 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-28 16:05:48 +0200
commitb97971bee55dc45420e0fe352d0b4df6e74716d4 (patch)
treef6456a80d31402dafbee7905d17758f7304d805b /drivers/hwtracing
parent89f00a1ae596876412c9b74e1c96453e9702a0cc (diff)
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>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-etm-perf.c2
1 files changed, 2 insertions, 0 deletions
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,
};