We use bit 63 of the event code for userspace to request that the event
be counted using EBB (Event Based Branches). Export this value, making
it part of the API - though only on processors that support EBB.
Signed-off-by: Michael Ellerman <mich...@ellerman.id.au>
---
arch/powerpc/include/asm/perf_event_server.h | 6 +-----
arch/powerpc/include/uapi/asm/Kbuild | 1 +
arch/powerpc/include/uapi/asm/perf_event.h | 18 ++++++++++++++++++
arch/powerpc/perf/core-book3s.c | 2 +-
arch/powerpc/perf/power8-pmu.c | 6 +++---
5 files changed, 24 insertions(+), 9 deletions(-)
create mode 100644 arch/powerpc/include/uapi/asm/perf_event.h
diff --git a/arch/powerpc/include/asm/perf_event_server.h
b/arch/powerpc/include/asm/perf_event_server.h
index 2dd7bfc..8b24926 100644
--- a/arch/powerpc/include/asm/perf_event_server.h
+++ b/arch/powerpc/include/asm/perf_event_server.h
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <asm/hw_irq.h>
#include <linux/device.h>
+#include <uapi/asm/perf_event.h>
#define MAX_HWEVENTS 8
#define MAX_EVENT_ALTERNATIVES 8
@@ -69,11 +70,6 @@ struct power_pmu {
#define PPMU_LIMITED_PMC_REQD 2 /* have to put this on a limited PMC */
#define PPMU_ONLY_COUNT_RUN 4 /* only counting in run state */
-/*
- * We use the event config bit 63 as a flag to request EBB.
- */
-#define EVENT_CONFIG_EBB_SHIFT 63
-
extern int register_power_pmu(struct power_pmu *);
struct pt_regs;
diff --git a/arch/powerpc/include/uapi/asm/Kbuild
b/arch/powerpc/include/uapi/asm/Kbuild
index 5182c86..48be855 100644
--- a/arch/powerpc/include/uapi/asm/Kbuild
+++ b/arch/powerpc/include/uapi/asm/Kbuild
@@ -20,6 +20,7 @@ header-y += mman.h
header-y += msgbuf.h
header-y += nvram.h
header-y += param.h
+header-y += perf_event.h
header-y += poll.h
header-y += posix_types.h
header-y += ps3fb.h
diff --git a/arch/powerpc/include/uapi/asm/perf_event.h
b/arch/powerpc/include/uapi/asm/perf_event.h
new file mode 100644
index 0000000..80a4d40
--- /dev/null
+++ b/arch/powerpc/include/uapi/asm/perf_event.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2013 Michael Ellerman, IBM Corp.
+ *
+ * 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; version 2 of the
+ * License.
+ */
+
+#ifndef _UAPI_ASM_POWERPC_PERF_EVENT_H
+#define _UAPI_ASM_POWERPC_PERF_EVENT_H
+
+/*
+ * We use bit 63 of perf_event_attr.config as a flag to request EBB.
+ */
+#define PERF_EVENT_CONFIG_EBB_SHIFT 63
+
+#endif /* _UAPI_ASM_POWERPC_PERF_EVENT_H */
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index a3985ae..2981f73 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -484,7 +484,7 @@ static bool is_ebb_event(struct perf_event *event)
* use bit 63 of the event code for something else if they wish.
*/
return (ppmu->flags & PPMU_EBB) &&
- ((event->attr.config >> EVENT_CONFIG_EBB_SHIFT) & 1);
+ ((event->attr.config >> PERF_EVENT_CONFIG_EBB_SHIFT) & 1);
}
static int ebb_event_check(struct perf_event *event)
diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c
index 96a64d6..5b49e78 100644
--- a/arch/powerpc/perf/power8-pmu.c
+++ b/arch/powerpc/perf/power8-pmu.c
@@ -118,7 +118,7 @@
(EVENT_UNIT_MASK << EVENT_UNIT_SHIFT) | \
(EVENT_COMBINE_MASK << EVENT_COMBINE_SHIFT) | \
(EVENT_MARKED_MASK << EVENT_MARKED_SHIFT) | \
- (EVENT_EBB_MASK << EVENT_CONFIG_EBB_SHIFT) | \
+ (EVENT_EBB_MASK << PERF_EVENT_CONFIG_EBB_SHIFT) | \
EVENT_PSEL_MASK)
/* MMCRA IFM bits - POWER8 */
@@ -233,10 +233,10 @@ static int power8_get_constraint(u64 event, unsigned long
*maskp, unsigned long
pmc = (event >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
unit = (event >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK;
cache = (event >> EVENT_CACHE_SEL_SHIFT) & EVENT_CACHE_SEL_MASK;
- ebb = (event >> EVENT_CONFIG_EBB_SHIFT) & EVENT_EBB_MASK;
+ ebb = (event >> PERF_EVENT_CONFIG_EBB_SHIFT) & EVENT_EBB_MASK;
/* Clear the EBB bit in the event, so event checks work below */
- event &= ~(EVENT_EBB_MASK << EVENT_CONFIG_EBB_SHIFT);
+ event &= ~(EVENT_EBB_MASK << PERF_EVENT_CONFIG_EBB_SHIFT);
if (pmc) {
if (pmc > 6)
--
1.8.1.2
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