linux-kernel - [PATCH 2/8]powerpc/perf: Export Power8 generic events in sysfs

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Message-Id: <1434012217-9776-3-git-send-email-maddy@linux.vnet.ibm.com>
Date:	Thu, 11 Jun 2015 14:13:31 +0530
From:	Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
To:	benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	sukadev@...ux.vnet.ibm.com, eranian@...gle.com,
	khandual@...ux.vnet.ibm.com, rusty@...tcorp.com.au,
	Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
Subject: [PATCH 2/8]powerpc/perf: Export Power8 generic events in sysfs

From: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>

Export generic perf events for Power8 in sysfs.

Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/power8-events-list.h | 20 ++++++++++++++++
 arch/powerpc/perf/power8-pmu.c         | 43 +++++++++++++++++++++++++++++-----
 2 files changed, 57 insertions(+), 6 deletions(-)
 create mode 100644 arch/powerpc/perf/power8-events-list.h

diff --git a/arch/powerpc/perf/power8-events-list.h b/arch/powerpc/perf/power8-events-list.h
new file mode 100644
index 0000000..1368547
--- /dev/null
+++ b/arch/powerpc/perf/power8-events-list.h
@@ -0,0 +1,20 @@
+/*
+ * Performance counter support for POWER8 processors.
+ *
+ * Copyright 2013 Sukadev Bhattiprolu, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/*
+ * Some power8 event codes.
+ */
+EVENT(PM_CYC,				0x0001e)
+EVENT(PM_GCT_NOSLOT_CYC,		0x100f8)
+EVENT(PM_CMPLU_STALL,			0x4000a)
+EVENT(PM_INST_CMPL,			0x00002)
+EVENT(PM_BRU_FIN,			0x10068)
+EVENT(PM_BR_MPRED_CMPL,			0x400f6)
diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
index 396351d..a542310 100644
--- a/arch/powerpc/perf/power8-pmu.c
+++ b/arch/powerpc/perf/power8-pmu.c
@@ -21,12 +21,11 @@
 /*
  * Some power8 event codes.
  */
-#define PM_CYC				0x0001e
-#define PM_GCT_NOSLOT_CYC		0x100f8
-#define PM_CMPLU_STALL			0x4000a
-#define PM_INST_CMPL			0x00002
-#define PM_BRU_FIN			0x10068
-#define PM_BR_MPRED_CMPL		0x400f6
+enum {
+#include "power8-events-list.h"
+};
+
+#undef EVENT
 
 /* All L1 D cache load references counted at finish, gated by reject */
 #define PM_LD_REF_L1			0x100ee
@@ -604,6 +603,37 @@ static void power8_disable_pmc(unsigned int pmc, unsigned long mmcr[])
 		mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
 }
 
+GENERIC_EVENT_ATTR(cpu-cyles,			PM_CYC);
+GENERIC_EVENT_ATTR(stalled-cycles-frontend,	PM_GCT_NOSLOT_CYC);
+GENERIC_EVENT_ATTR(stalled-cycles-backend,	PM_CMPLU_STALL);
+GENERIC_EVENT_ATTR(instructions,		PM_INST_CMPL);
+GENERIC_EVENT_ATTR(branch-instructions,		PM_BRU_FIN);
+GENERIC_EVENT_ATTR(branch-misses,		PM_BR_MPRED_CMPL);
+
+#define EVENT(_name, _code)	POWER_EVENT_ATTR(_name, _name);
+#include "power8-events-list.h"
+#undef EVENT
+
+#define EVENT(_name, _code)	POWER_EVENT_PTR(_name),
+
+static struct attribute *power8_events_attr[] = {
+	GENERIC_EVENT_PTR(PM_CYC),
+	GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC),
+	GENERIC_EVENT_PTR(PM_CMPLU_STALL),
+	GENERIC_EVENT_PTR(PM_INST_CMPL),
+	GENERIC_EVENT_PTR(PM_BRU_FIN),
+	GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
+
+	#include "power8-events-list.h"
+	#undef EVENT
+	NULL
+};
+
+static struct attribute_group power8_pmu_events_group = {
+	.name = "events",
+	.attrs = power8_events_attr,
+};
+
 PMU_FORMAT_ATTR(event,		"config:0-49");
 PMU_FORMAT_ATTR(pmcxsel,	"config:0-7");
 PMU_FORMAT_ATTR(mark,		"config:8");
@@ -640,6 +670,7 @@ struct attribute_group power8_pmu_format_group = {
 
 static const struct attribute_group *power8_pmu_attr_groups[] = {
 	&power8_pmu_format_group,
+	&power8_pmu_events_group,
 	NULL,
 };
 
-- 
1.9.1

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