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authorMao Han <han_mao@c-sky.com>2019-06-04 13:54:49 +0300
committerGuo Ren <ren_guo@c-sky.com>2019-07-19 09:21:36 +0300
commitd41435d9b2b3f8fb58dc1258220401ad16aa8a19 (patch)
tree540a4403883432901eb55b4ee166b281addeaa53 /arch/csky
parentf622fbf205966a8e911f81a00db17997dd171404 (diff)
downloadlinux-d41435d9b2b3f8fb58dc1258220401ad16aa8a19.tar.xz
csky: Fix perf record in kernel/user space
csky_pmu_event_init is called several times during the perf record initialzation. After configure the event counter in either kernel space or user space, csky_pmu_event_init is called twice with no attr specified. Configuration will be overwritten with sampling in both kernel space and user space. --all-kernel/--all-user is useless without this patch applied. Signed-off-by: Mao Han <han_mao@c-sky.com> Signed-off-by: Guo Ren <guoren@kernel.org>
Diffstat (limited to 'arch/csky')
-rw-r--r--arch/csky/kernel/perf_event.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index 7873306dec89..a61183a20829 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -922,15 +922,6 @@ static int csky_pmu_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int ret;
- if (event->attr.exclude_user)
- csky_pmu.hpcr = BIT(2);
- else if (event->attr.exclude_kernel)
- csky_pmu.hpcr = BIT(3);
- else
- csky_pmu.hpcr = BIT(2) | BIT(3);
-
- csky_pmu.hpcr |= BIT(1) | BIT(0);
-
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
if (event->attr.config >= PERF_COUNT_HW_MAX)
@@ -939,21 +930,32 @@ static int csky_pmu_event_init(struct perf_event *event)
if (ret == HW_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
- return 0;
+ break;
case PERF_TYPE_HW_CACHE:
ret = csky_pmu_cache_event(event->attr.config);
if (ret == CACHE_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
- return 0;
+ break;
case PERF_TYPE_RAW:
if (hw_raw_read_mapping[event->attr.config] == NULL)
return -ENOENT;
hwc->idx = event->attr.config;
- return 0;
+ break;
default:
return -ENOENT;
}
+
+ if (event->attr.exclude_user)
+ csky_pmu.hpcr = BIT(2);
+ else if (event->attr.exclude_kernel)
+ csky_pmu.hpcr = BIT(3);
+ else
+ csky_pmu.hpcr = BIT(2) | BIT(3);
+
+ csky_pmu.hpcr |= BIT(1) | BIT(0);
+
+ return 0;
}
/* starts all counters */