From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Yicong Yang <yangyicong@huawei.com>
Cc: <suzuki.poulose@arm.com>, <mathieu.poirier@linaro.org>,
<linux-kernel@vger.kernel.org>,
<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: Re: [PATCH 4/5] hwtracing: hisi_ptt: Don't try to attach a task
Date: Fri, 25 Aug 2023 12:25:16 +0100 [thread overview]
Message-ID: <20230825122516.000053d8@Huawei.com> (raw)
In-Reply-To: <20230809081825.11518-5-yangyicong@huawei.com>
On Wed, 9 Aug 2023 16:18:24 +0800
Yicong Yang <yangyicong@huawei.com> wrote:
> 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 3aba7bb6e548..916686c6a9c8 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;
>
next prev parent reply other threads:[~2023-08-25 11:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-09 8:18 [PATCH 0/5] Several updates for PTT driver Yicong Yang
2023-08-09 8:18 ` [PATCH 1/5] hwtracing: hisi_ptt: Disable interrupt after trace end Yicong Yang
2023-08-25 11:23 ` Jonathan Cameron
2023-08-09 8:18 ` [PATCH 2/5] hwtracing: hisi_ptt: Handle the interrupt in hardirq context Yicong Yang
2023-08-25 11:24 ` Jonathan Cameron
2023-08-09 8:18 ` [PATCH 3/5] hwtracing: hisi_ptt: Optimize the trace data committing Yicong Yang
2023-08-25 11:24 ` Jonathan Cameron
2023-08-09 8:18 ` [PATCH 4/5] hwtracing: hisi_ptt: Don't try to attach a task Yicong Yang
2023-08-25 11:25 ` Jonathan Cameron [this message]
2023-08-09 8:18 ` [PATCH 5/5] hwtracing: hisi_ptt: Add dummy callback pmu::read() Yicong Yang
2023-08-25 11:25 ` Jonathan Cameron
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230825122516.000053d8@Huawei.com \
--to=jonathan.cameron@huawei.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=hejunhao3@huawei.com \
--cc=helgaas@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=mathieu.poirier@linaro.org \
--cc=prime.zeng@hisilicon.com \
--cc=suzuki.poulose@arm.com \
--cc=yangyicong@hisilicon.com \
--cc=yangyicong@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).