From: Mao Han <han_mao@c-sky.com>
To: linux-kernel@vger.kernel.org
Cc: Mao Han <han_mao@c-sky.com>,
linux-csky@vger.kernel.org, Guo Ren <guoren@kernel.org>
Subject: [PATCH V4 6/6] csky: Fix perf record in kernel/user space
Date: Tue, 4 Jun 2019 10:24:00 +0800 [thread overview]
Message-ID: <3a6a5379b4f692773d82ff5ad18a7b22ceaf5a80.1559614824.git.han_mao@c-sky.com> (raw)
In-Reply-To: <cover.1559614824.git.han_mao@c-sky.com>
In-Reply-To: <cover.1559614824.git.han_mao@c-sky.com>
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>
Cc: Guo Ren <guoren@kernel.org>
Cc: linux-csky@vger.kernel.org
---
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 dc84dc7..e3308ab 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
next prev parent reply other threads:[~2019-06-04 2:25 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 2:23 [PATCH V4 0/6] csky: Add pmu hardware sampling support Mao Han
2019-06-04 2:23 ` [PATCH V4 1/6] csky: Init pmu as a device Mao Han
2019-06-04 5:50 ` Guo Ren
2019-06-04 2:23 ` [PATCH V4 2/6] csky: Add count-width property for csky pmu Mao Han
2019-06-04 5:35 ` Guo Ren
2019-06-04 2:23 ` [PATCH V4 3/6] csky: Add pmu interrupt support Mao Han
2019-06-04 6:31 ` Guo Ren
2019-06-04 2:23 ` [PATCH V4 4/6] dt-bindings: csky: Add csky PMU bindings Mao Han
2019-06-04 5:38 ` Guo Ren
2019-06-04 2:23 ` [PATCH V4 5/6] csky: Fixup some error count in 810 & 860 Mao Han
2019-06-04 2:24 ` Mao Han [this message]
2019-06-04 6:36 ` [PATCH V4 6/6] csky: Fix perf record in kernel/user space Guo Ren
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