[PATCH v4 2/5] perf/x86: add PERF_SAMPLE_SKID_IP support for X86 PEBS

From: Stephane Eranian
Date: Thu Nov 09 2017 - 02:57:33 EST


This atch adds support for SKID_IP to Intel x86 processors in PEBS
mode.

Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx>
---
arch/x86/events/intel/ds.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 3674a4b6f8bd..dd248ceda452 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -1190,6 +1190,13 @@ static void setup_pebs_sample_data(struct perf_event *event,
x86_pmu.intel_cap.pebs_format >= 1)
data->addr = pebs->dla;

+ /*
+ * unmodified, skid IP which is guaranteed to be the next
+ * dyanmic instruction
+ */
+ if (sample_type & PERF_SAMPLE_SKID_IP)
+ data->skid_ip = pebs->ip;
+
if (x86_pmu.intel_cap.pebs_format >= 2) {
/* Only set the TSX weight when no memory weight. */
if ((sample_type & PERF_SAMPLE_WEIGHT) && !fll)
--
2.7.4