All of lore.kernel.org
 help / color / mirror / Atom feed
From: German Gomez <german.gomez@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, will@kernel.org,
	mark.rutland@arm.com, james.clark@arm.com, leo.yan@linaro.org
Cc: German Gomez <german.gomez@arm.com>
Subject: [RFC PATCH 0/2] perf: arm_spe: Fix consistency of CONTEXT packets in SPE driver
Date: Mon, 17 Jan 2022 12:44:30 +0000	[thread overview]
Message-ID: <20220117124432.3119132-1-german.gomez@arm.com> (raw)

Applies a couple of small changes to the arm_spe_pmu driver.

We are seeing context packets in an inconsistent number of SPE records
even  when the perf-tool runs without the needed capabilities. This is
fixed in [1/2].

We're also allowing CONTEXT packets to be collected in per-cpu events in
[2/2].

I'm sending as an RFC because it's the first time I change driver code.
Also I'm not 100% sure of the approach in [2/2] (from a security and/or
implementation standpoint).

Thanks,
German

- [PATCH 1/2] Fixes the consistency issue with the context packets.
- [PATCH 2/2] Enables context packets in per-cpu events.

German Gomez (2):
  perf: arm_spe: Fix consistency of PMSCR register bit CX
  perf: arm_spe: Enable CONTEXT packets in SPE traces if the profiler
    runs in CPU mode.

 drivers/perf/arm_spe_pmu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: German Gomez <german.gomez@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, will@kernel.org,
	mark.rutland@arm.com, james.clark@arm.com, leo.yan@linaro.org
Cc: German Gomez <german.gomez@arm.com>
Subject: [RFC PATCH 0/2] perf: arm_spe: Fix consistency of CONTEXT packets in SPE driver
Date: Mon, 17 Jan 2022 12:44:30 +0000	[thread overview]
Message-ID: <20220117124432.3119132-1-german.gomez@arm.com> (raw)

Applies a couple of small changes to the arm_spe_pmu driver.

We are seeing context packets in an inconsistent number of SPE records
even  when the perf-tool runs without the needed capabilities. This is
fixed in [1/2].

We're also allowing CONTEXT packets to be collected in per-cpu events in
[2/2].

I'm sending as an RFC because it's the first time I change driver code.
Also I'm not 100% sure of the approach in [2/2] (from a security and/or
implementation standpoint).

Thanks,
German

- [PATCH 1/2] Fixes the consistency issue with the context packets.
- [PATCH 2/2] Enables context packets in per-cpu events.

German Gomez (2):
  perf: arm_spe: Fix consistency of PMSCR register bit CX
  perf: arm_spe: Enable CONTEXT packets in SPE traces if the profiler
    runs in CPU mode.

 drivers/perf/arm_spe_pmu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2022-01-17 12:45 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-17 12:44 German Gomez [this message]
2022-01-17 12:44 ` [RFC PATCH 0/2] perf: arm_spe: Fix consistency of CONTEXT packets in SPE driver German Gomez
2022-01-17 12:44 ` [RFC PATCH 1/2] perf: arm_spe: Fix consistency of PMSCR register bit CX German Gomez
2022-01-17 12:44   ` German Gomez
2022-01-18 10:07   ` Will Deacon
2022-01-18 10:07     ` Will Deacon
2022-01-18 14:04     ` German Gomez
2022-01-18 14:04       ` German Gomez
2022-01-19 11:27       ` German Gomez
2022-01-19 11:27         ` German Gomez
2022-01-18 16:28     ` James Clark
2022-01-18 16:28       ` James Clark
2022-02-05 15:39   ` Leo Yan
2022-02-05 15:39     ` Leo Yan
2022-02-07 12:06     ` German Gomez
2022-02-07 12:06       ` German Gomez
2022-02-08 13:00       ` Leo Yan
2022-02-08 13:00         ` Leo Yan
2022-02-10 17:23         ` German Gomez
2022-02-10 17:23           ` German Gomez
2022-02-11 10:45           ` Leo Yan
2022-02-11 10:45             ` Leo Yan
2022-02-15 14:29             ` German Gomez
2022-02-15 14:29               ` German Gomez
2022-02-16 13:22               ` Leo Yan
2022-02-16 13:22                 ` Leo Yan
2022-02-16 15:16                 ` German Gomez
2022-02-16 15:16                   ` German Gomez
2022-01-17 12:44 ` [RFC PATCH 2/2] perf: arm_spe: Enable CONTEXT packets in SPE traces if the profiler runs in CPU mode German Gomez
2022-01-17 12:44   ` German Gomez
2022-01-17 14:04   ` German Gomez
2022-01-17 14:04     ` German Gomez
2022-01-18  9:52   ` Will Deacon
2022-01-18  9:52     ` Will Deacon
2022-01-18 14:13     ` German Gomez
2022-01-18 14:13       ` German Gomez

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=20220117124432.3119132-1-german.gomez@arm.com \
    --to=german.gomez@arm.com \
    --cc=james.clark@arm.com \
    --cc=leo.yan@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=will@kernel.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.