linux-kernel - [PATCH v2 0/2] perf cs-etm: Fix decoding for sparse CPU maps

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Message-Id: <20260119-james-perf-coresight-cpu-map-segfault-v2-0-56b956a629ee@linaro.org>
Date: Mon, 19 Jan 2026 10:18:34 +0000
From: James Clark <james.clark@...aro.org>
To: Suzuki K Poulose <suzuki.poulose@....com>, 
 Mike Leach <mike.leach@...aro.org>, John Garry <john.g.garry@...cle.com>, 
 Will Deacon <will@...nel.org>, Leo Yan <leo.yan@...ux.dev>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>, 
 Thomas Falcon <thomas.falcon@...el.com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org, 
 linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
 James Clark <james.clark@...aro.org>
Subject: [PATCH v2 0/2] perf cs-etm: Fix decoding for sparse CPU maps

Fix a regression caused by an incorrect assumption about auxtrace
indices. Then add a test that would have caught it.

---
Changes in v2:
- Fix cover letter and subject
- Link to v1: https://lore.kernel.org/r/20260119-james-perf-coresight-cpu-map-segfault-v1-0-a9cfd67653ae@linaro.org

---
James Clark (2):
      perf cs-etm: Fix decoding for sparse CPU maps
      perf cs-etm: Test sparse CPU maps

 tools/perf/tests/shell/test_arm_coresight.sh | 54 ++++++++++++++++++++++++++++
 tools/perf/util/cs-etm.c                     |  3 +-
 2 files changed, 56 insertions(+), 1 deletion(-)
---
base-commit: 571d29baa07e83e637075239f379f91353c24ec9
change-id: 20260115-james-perf-coresight-cpu-map-segfault-e250af5aa778

Best regards,
-- 
James Clark <james.clark@...aro.org>