[PATCH v3 2/5] perf/x86: add PERF_SAMPLE_SKID_IP support for X86 PEBS

From: Stephane Eranian <eranian@google.com>
To: linux-kernel@vger.kernel.org
Cc: acme@redhat.com, peterz@infradead.org, mingo@elte.hu,
	ak@linux.intel.com, kan.liang@intel.com, jolsa@redhat.com
Subject: [PATCH v3 2/5] perf/x86: add PERF_SAMPLE_SKID_IP support for X86 PEBS
Date: Tue,  7 Nov 2017 23:56:34 -0800	[thread overview]
Message-ID: <1510127797-22483-3-git-send-email-eranian@google.com> (raw)
In-Reply-To: <1510127797-22483-1-git-send-email-eranian@google.com>

This patch adds support for SKID_IP for Intel x86 processors
when PEBS mode is enabled.

Signed-off-by: Stephane Eranian <eranian@google.com>
---
 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..52866a470b0d 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
+	 * dynamic 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
