linux-kernel - [PATCH v2 0/6] perf cs-etm: Support TRBE (unformatted decoding)

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Date:   Wed, 21 Jul 2021 16:01:56 +0100
From:   James Clark <james.clark@....com>
To:     acme@...nel.org, mathieu.poirier@...aro.org,
        coresight@...ts.linaro.org
Cc:     leo.yan@...aro.org, al.grant@....com, suzuki.poulose@....com,
        anshuman.khandual@....com, mike.leach@...aro.org,
        James Clark <james.clark@....com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/6] perf cs-etm: Support TRBE (unformatted decoding)

This patchset consists of refactoring to allow the decoder to be
created in advance when the AUX records are iterated over. The
AUX record flags are used to communicate whether the data is
formatted or not which is the reason this refactoring is required.

These changes result in some simplifications, removal of early exit
conditions etc.

A change was also made to --dump-raw-trace code to allow the
formatted/unformatted status to persist and for the decoder to
not be continually deleted and recreated.

The changes apply on top of the previous patchset "[PATCH v7 0/2] perf
cs-etm: Split Coresight decode by aux records".

Changes since v1:
 * Change 'decoders_per_cpu' variable name to 'decoders' and add a comment
 * Add a warning that piped mode is best effort, suggested by Suzuki

James Clark (6):
  perf cs-etm: Refactor initialisation of kernel start address
  perf cs-etm: Split setup and timestamp search functions
  perf cs-etm: Only setup queues when they are modified
  perf cs-etm: Suppress printing when resetting decoder
  perf cs-etm: Use existing decoder instead of resetting it
  perf cs-etm: Pass unformatted flag to decoder

 .../perf/util/cs-etm-decoder/cs-etm-decoder.c |  14 +-
 tools/perf/util/cs-etm.c                      | 185 +++++++++---------
 2 files changed, 97 insertions(+), 102 deletions(-)

-- 
2.28.0