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

[Leo Yan]

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....@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