linux-kernel - [PATCH 3/3] perf, uncore: enable ev_sel

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Date:	Tue, 13 Aug 2013 14:29:42 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, eranian@...gle.com, ak@...ux.intel.com,
	"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: [PATCH 3/3] perf, uncore: enable ev_sel_ext bit for PCU.

From: "Yan, Zheng" <zheng.z.yan@...el.com>

This patch adds support for the SNB-EP PCU uncore PMU extra_sel_bit
(bit 21) which is missing from the documentation in Table-2.75 of
Intel Xeon Processor E5-2600 Product Family Uncore Performance
Monitoring Guide. It is referred to later in Table-2.81. Without
this selection bit explicitly enabled by the kernel, some events
such as COREx_TRANSITION_CYCLES do not count correctly.

Signed-off-by: Yan, Zheng <zheng.z.yan@...el.com>
---
 arch/x86/kernel/cpu/perf_event_intel_uncore.c | 2 +-
 arch/x86/kernel/cpu/perf_event_intel_uncore.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 6b8b9c9..e9696d8 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -301,7 +301,7 @@ static struct attribute *snbep_uncore_cbox_formats_attr[] = {
 };
 
 static struct attribute *snbep_uncore_pcu_formats_attr[] = {
-	&format_attr_event.attr,
+	&format_attr_event_ext.attr,
 	&format_attr_occ_sel.attr,
 	&format_attr_edge.attr,
 	&format_attr_inv.attr,
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 628500e..a80ab71 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -117,6 +117,7 @@
 				(SNBEP_PMON_CTL_EV_SEL_MASK | \
 				 SNBEP_PCU_MSR_PMON_CTL_OCC_SEL_MASK | \
 				 SNBEP_PMON_CTL_EDGE_DET | \
+				 SNBEP_PMON_CTL_EV_SEL_EXT | \
 				 SNBEP_PMON_CTL_INVERT | \
 				 SNBEP_PCU_MSR_PMON_CTL_TRESH_MASK | \
 				 SNBEP_PCU_MSR_PMON_CTL_OCC_INVERT | \
-- 
1.8.1.4

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