From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@linaro.org>,
James Clark <James.Clark@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>, Jiri Olsa <jolsa@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Daniel Kiss <daniel.kiss@arm.com>,
Denis Nikitin <denik@google.com>
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v2 0/3] coresight: Fix for snapshot mode
Date: Thu, 1 Jul 2021 17:35:34 +0800 [thread overview]
Message-ID: <20210701093537.90759-1-leo.yan@linaro.org> (raw)
This patch series is to correct the pointer usages for the snapshot
mode.
Patch 01 is to polish code, it removes the redundant header maintained
in tmc-etr driver and directly uses pointer perf_output_handle::head.
Patch 02 removes the callback cs_etm_find_snapshot() which wrongly
calculates the buffer headers; we can simply use the perf's common
function __auxtrace_mmap__read() for headers calculation. Patch 03 is
to update comments in CoreSight drivers to reflect the changes
introduced by patch 02.
This patch can be cleanly applied on the mainline kernel with:
commit dbe69e433722 ("Merge tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next")
And it has been tested on Arm64 Juno board.
Changes from v1:
- Dropped the patch "coresight: etm-perf: Correct buffer syncing for
snapshot", after a long discussion, the patch doesn't really resolve
any issues for snapshot mode. And another reason for unlike this
patch is now the CoreSight and Intel-PT have the consistent behaviour
(Suzuki/James/Mathieu);
- Added the patch 03 to updates drivers' comments (James);
- Added Suzuki's review tag for patch 01;
- Added James' review and testing tags for patch 02.
Leo Yan (3):
coresight: tmc-etr: Use perf_output_handle::head for AUX ring buffer
perf cs-etm: Remove callback cs_etm_find_snapshot()
coresight: Update comments for removing cs_etm_find_snapshot()
drivers/hwtracing/coresight/coresight-etb10.c | 2 +-
.../hwtracing/coresight/coresight-tmc-etf.c | 2 +-
.../hwtracing/coresight/coresight-tmc-etr.c | 12 +-
tools/perf/arch/arm/util/cs-etm.c | 133 ------------------
4 files changed, 6 insertions(+), 143 deletions(-)
--
2.25.1
next reply other threads:[~2021-07-01 9:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-01 9:35 Leo Yan [this message]
2021-07-01 9:35 ` [PATCH v2 1/3] coresight: tmc-etr: Use perf_output_handle::head for AUX ring buffer Leo Yan
2021-07-01 9:35 ` [PATCH v2 2/3] perf cs-etm: Remove callback cs_etm_find_snapshot() Leo Yan
2021-07-01 16:25 ` Arnaldo Carvalho de Melo
2021-07-02 1:10 ` Leo Yan
2021-07-02 18:00 ` Mathieu Poirier
2021-07-01 9:35 ` [PATCH v2 3/3] coresight: Update comments for removing cs_etm_find_snapshot() Leo Yan
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