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@xxxxxxxxx>
CC: Guo Ren <guoren@xxxxxxxxxx>
CC: linux-csky@xxxxxxxxxxxxxxx
---
arch/csky/kernel/perf_event.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index de95005..011fd9b 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -983,6 +983,12 @@ static int csky_pmu_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int ret;
+ if (event->attr.type != PERF_TYPE_HARDWARE &&
+ event->attr.type != PERF_TYPE_HW_CACHE &&
+ event->attr.type != PERF_TYPE_RAW) {
+ return -ENOENT;
+ }
+
if (event->attr.exclude_user)
csky_pmu.hpcr = BIT(2);
else if (event->attr.exclude_kernel)
--
2.7.4
