[PATCH v1 6/7] perf cs-etm: Add helper cs_etm__get_pid_fmt()

Leo Yan
2021-01-09T07:46:30Z

This patch adds helper function cs_etm__get_pid_fmt(), by passing
parameter "traceID", it returns the corresponding PID format.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
tools/perf/util/cs-etm.c | 18 ++++++++++++++++++
tools/perf/util/cs-etm.h | 1 +
2 files changed, 19 insertions(+)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 8c125134a756..6705d39c8cee 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -157,6 +157,24 @@ int cs_etm__get_cpu(u8 trace_chan_id, int *cpu)
return 0;
}

+int cs_etm__get_pid_fmt(u8 trace_chan_id, u64 *pid_fmt)
+{
+ struct int_node *inode;
+ u64 *metadata;
+
+ inode = intlist__find(traceid_list, trace_chan_id);
+ if (!inode)
+ return -EINVAL;
+
+ metadata = inode->priv;
+ if (metadata[CS_ETM_MAGIC] == __perf_cs_etmv3_magic)
+ *pid_fmt = metadata[CS_ETM_PID_FMT];
+ else
+ *pid_fmt = metadata[CS_ETMV4_PID_FMT];
+
+ return 0;
+}
+
void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
u8 trace_chan_id)
{
diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h
index 8cbbea6100a1..98801040175f 100644
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -175,6 +175,7 @@ struct cs_etm_packet_queue {
int cs_etm__process_auxtrace_info(union perf_event *event,
struct perf_session *session);
int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
+int cs_etm__get_pid_fmt(u8 trace_chan_id, u64 *pid_fmt);
int cs_etm__etmq_set_tid(struct cs_etm_queue *etmq,
pid_t tid, u8 trace_chan_id);
bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq);
--
2.25.1