msm: rtb: record counter timestamp for every log record
Record counter timestamp in every RTB log record to help
correlate these events with other subsystem events which
occur outside of cpu subsystem.
Change-Id: Ib1291524c53c4ec757a494a1e08cb0925720e1a6
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
diff --git a/kernel/trace/msm_rtb.c b/kernel/trace/msm_rtb.c
index 34c48b1..9d9f0bf 100644
--- a/kernel/trace/msm_rtb.c
+++ b/kernel/trace/msm_rtb.c
@@ -27,6 +27,7 @@
#include <linux/io.h>
#include <asm-generic/sizes.h>
#include <linux/msm_rtb.h>
+#include <asm/timex.h>
#define SENTINEL_BYTE_1 0xFF
#define SENTINEL_BYTE_2 0xAA
@@ -41,8 +42,9 @@
* 4) 4 bytes index
* 4) 8 bytes extra data from the caller
* 5) 8 bytes of timestamp
+ * 6) 8 bytes of cyclecount
*
- * Total = 32 bytes.
+ * Total = 40 bytes.
*/
struct msm_rtb_layout {
unsigned char sentinel[3];
@@ -51,6 +53,7 @@
uint64_t caller;
uint64_t data;
uint64_t timestamp;
+ uint64_t cycle_count;
} __attribute__ ((__packed__));
@@ -132,6 +135,11 @@
start->timestamp = sched_clock();
}
+static void msm_rtb_write_cyclecount(struct msm_rtb_layout *start)
+{
+ start->cycle_count = get_cycles();
+}
+
static void uncached_logk_pc_idx(enum logk_event_type log_type, uint64_t caller,
uint64_t data, int idx)
{
@@ -145,6 +153,7 @@
msm_rtb_write_idx(idx, start);
msm_rtb_write_data(data, start);
msm_rtb_write_timestamp(start);
+ msm_rtb_write_cyclecount(start);
mb();
}