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From: Yicong Yang <yangyicong@huawei.com>
To: <suzuki.poulose@arm.com>, <mathieu.poirier@linaro.org>,
	<jonathan.cameron@huawei.com>, <linux-kernel@vger.kernel.org>
Cc: <alexander.shishkin@linux.intel.com>, <helgaas@kernel.org>,
	<linux-pci@vger.kernel.org>, <prime.zeng@hisilicon.com>,
	<linuxarm@huawei.com>, <yangyicong@hisilicon.com>,
	<hejunhao3@huawei.com>
Subject: [PATCH v3 4/5] hwtracing: hisi_ptt: Don't try to attach a task
Date: Tue, 10 Oct 2023 16:47:30 +0800	[thread overview]
Message-ID: <20231010084731.30450-5-yangyicong@huawei.com> (raw)
In-Reply-To: <20231010084731.30450-1-yangyicong@huawei.com>

From: Yicong Yang <yangyicong@hisilicon.com>

PTT is an uncore PMU and shouldn't be attached to any task. Block
the usage in pmu::event_init().

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/hwtracing/ptt/hisi_ptt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c
index 4f355df8da23..62a444f5228e 100644
--- a/drivers/hwtracing/ptt/hisi_ptt.c
+++ b/drivers/hwtracing/ptt/hisi_ptt.c
@@ -1003,6 +1003,9 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event)
 		return -EOPNOTSUPP;
 	}
 
+	if (event->attach_state & PERF_ATTACH_TASK)
+		return -EOPNOTSUPP;
+
 	if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type)
 		return -ENOENT;
 
-- 
2.24.0


  parent reply	other threads:[~2023-10-10  8:50 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-10  8:47 [PATCH v3 0/5] Several updates for PTT driver Yicong Yang
2023-10-10  8:47 ` [PATCH v3 1/5] hwtracing: hisi_ptt: Disable interrupt after trace end Yicong Yang
2023-10-10  8:47 ` [PATCH v3 2/5] hwtracing: hisi_ptt: Handle the interrupt in hardirq context Yicong Yang
2023-10-10  8:47 ` [PATCH v3 3/5] hwtracing: hisi_ptt: Optimize the trace data committing Yicong Yang
2023-10-10  8:47 ` Yicong Yang [this message]
2023-10-10  8:47 ` [PATCH v3 5/5] hwtracing: hisi_ptt: Add dummy callback pmu::read() Yicong Yang
2023-10-17 12:21 ` [PATCH v3 0/5] Several updates for PTT driver Yicong Yang
2023-10-17 17:01 ` Suzuki K Poulose
2023-10-18  9:32   ` Yicong Yang

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