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>

diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index 7873306dec89ce48d5f09beba6b038d70058a4fa..a61183a208290d5658262385a96ba403631a0cdd 100644 (file)
--- 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 */