[RFC PATCH V2 7/9] perf session: Support the monotonic raw clock conversion information

[kan . liang]

From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>

The monotonic raw clock conversion information can be retrieved from
the perf_event_mmap_page::cap_user_time_mono_raw ABI. Store the
information in the struct perf_record_time_conv for later usage.
Dump the information in TIME_CONV event as well.

Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
---
 tools/lib/perf/include/perf/event.h |  8 +++++++-
 tools/perf/util/session.c           |  8 ++++++++
 tools/perf/util/tsc.c               | 22 +++++++++++++++++++++-
 tools/perf/util/tsc.h               |  6 ++++++
 4 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index ad47d7b31046..20187a3d84c8 100644
--- a/tools/lib/perf/include/perf/event.h
+++ b/tools/lib/perf/include/perf/event.h
@@ -422,9 +422,15 @@ struct perf_record_time_conv {
 	__u64			 time_zero;
 	__u64			 time_cycles;
 	__u64			 time_mask;
+	__u64			 time_mono_last;
+	__u32			 time_mono_mult;
+	__u32			 time_mono_shift;
+	__u64			 time_mono_nsec;
+	__u64			 time_mono_base;
 	__u8			 cap_user_time_zero;
 	__u8			 cap_user_time_short;
-	__u8			 reserved[6];	/* For alignment */
+	__u8			 cap_user_time_mono_raw;
+	__u8			 reserved[5];	/* For alignment */
 };
 
 struct perf_record_header_feature {
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 7c021c6cedb9..189149a7012f 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -995,6 +995,14 @@ static void perf_event__time_conv_swap(union perf_event *event,
 		event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
 		event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
 	}
+
+	if (event_contains(event->time_conv, time_mono_last)) {
+		event->time_conv.time_mono_last = bswap_64(event->time_conv.time_mono_last);
+		event->time_conv.time_mono_mult = bswap_32(event->time_conv.time_mono_mult);
+		event->time_conv.time_mono_shift = bswap_32(event->time_conv.time_mono_shift);
+		event->time_conv.time_mono_nsec = bswap_64(event->time_conv.time_mono_nsec);
+		event->time_conv.time_mono_base = bswap_64(event->time_conv.time_mono_base);
+	}
 }
 
 typedef void (*perf_event__swap_op)(union perf_event *event,
diff --git a/tools/perf/util/tsc.c b/tools/perf/util/tsc.c
index f19791d46e99..0b59c0f815f9 100644
--- a/tools/perf/util/tsc.c
+++ b/tools/perf/util/tsc.c
@@ -54,8 +54,14 @@ int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
 		tc->time_zero = pc->time_zero;
 		tc->time_cycles = pc->time_cycles;
 		tc->time_mask = pc->time_mask;
+		tc->time_mono_last = pc->time_mono_last;
+		tc->time_mono_mult = pc->time_mono_mult;
+		tc->time_mono_shift = pc->time_mono_shift;
+		tc->time_mono_nsec = pc->time_mono_nsec;
+		tc->time_mono_base = pc->time_mono_base;
 		tc->cap_user_time_zero = pc->cap_user_time_zero;
 		tc->cap_user_time_short	= pc->cap_user_time_short;
+		tc->cap_user_time_mono_raw = pc->cap_user_time_mono_raw;
 		rmb();
 		if (pc->lock == seq && !(seq & 1))
 			break;
@@ -65,7 +71,7 @@ int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
 		}
 	}
 
-	if (!tc->cap_user_time_zero)
+	if (!tc->cap_user_time_zero && !tc->cap_user_time_mono_raw)
 		return -EOPNOTSUPP;
 
 	return 0;
@@ -102,8 +108,14 @@ int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc,
 	event.time_conv.time_zero  = tc.time_zero;
 	event.time_conv.time_cycles = tc.time_cycles;
 	event.time_conv.time_mask = tc.time_mask;
+	event.time_conv.time_mono_last = tc.time_mono_last;
+	event.time_conv.time_mono_mult = tc.time_mono_mult;
+	event.time_conv.time_mono_shift = tc.time_mono_shift;
+	event.time_conv.time_mono_nsec = tc.time_mono_nsec;
+	event.time_conv.time_mono_base = tc.time_mono_base;
 	event.time_conv.cap_user_time_zero = tc.cap_user_time_zero;
 	event.time_conv.cap_user_time_short = tc.cap_user_time_short;
+	event.time_conv.cap_user_time_mono_raw = tc.cap_user_time_mono_raw;
 
 	return process(tool, &event, NULL, machine);
 }
@@ -138,5 +150,13 @@ size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp)
 			       tc->cap_user_time_short);
 	}
 
+	ret += fprintf(fp, "... Cap Time Monotonic Raw  %" PRId32 "\n",
+		       tc->cap_user_time_mono_raw);
+	ret += fprintf(fp, "... Time Last       %" PRI_lu64 "\n", tc->time_mono_last);
+	ret += fprintf(fp, "... Time Multiplier %" PRId32 "\n", tc->time_mono_mult);
+	ret += fprintf(fp, "... Time Shift      %" PRId32 "\n", tc->time_mono_shift);
+	ret += fprintf(fp, "... Time Nsec       %" PRI_lu64 "\n", tc->time_mono_nsec);
+	ret += fprintf(fp, "... Time Base       %" PRI_lu64 "\n", tc->time_mono_base);
+
 	return ret;
 }
diff --git a/tools/perf/util/tsc.h b/tools/perf/util/tsc.h
index 88fd1c4c1cb8..6bacc450a14d 100644
--- a/tools/perf/util/tsc.h
+++ b/tools/perf/util/tsc.h
@@ -12,9 +12,15 @@ struct perf_tsc_conversion {
 	u64 time_zero;
 	u64 time_cycles;
 	u64 time_mask;
+	u64 time_mono_last;
+	u32 time_mono_mult;
+	u32 time_mono_shift;
+	u64 time_mono_nsec;
+	u64 time_mono_base;
 
 	bool cap_user_time_zero;
 	bool cap_user_time_short;
+	bool cap_user_time_mono_raw;
 };
 
 struct perf_event_mmap_page;
-- 
2.35.1