linux-kernel - [PATCH v8 0/3] perf: cs-etm: Update perf to handle new Coresight Trace ID

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Message-Id: <20230329111422.3693-1-mike.leach@linaro.org>
Date:   Wed, 29 Mar 2023 12:14:19 +0100
From:   Mike Leach <mike.leach@...aro.org>
To:     linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        linux-kernel@...r.kernel.org, acme@...nel.org,
        suzuki.poulose@....com
Cc:     leo.yan@...aro.org, peterz@...radead.org, mingo@...hat.com,
        will@...nel.org, john.garry@...wei.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, gankulkarni@...amperecomputing.com,
        darren@...amperecomputing.com, Mike Leach <mike.leach@...aro.org>
Subject: [PATCH v8 0/3] perf: cs-etm: Update perf to handle new Coresight Trace ID

The original method for allocating trace source ID values to sources was
to use a fixed algorithm for CPU based sources of (cpu_num * 2 + 0x10).
The STM was allocated ID 0x1.

This mechanism is broken for systems with more than 47 cores.

The kernel related patches the provide a fixed Trace ID allocation mechanism
are now upstreamed.

This patchset updates the perf code to handle the changes to the trace ID
notification mechanism that now uses the PERF_RECORD_AUX_OUTPUT_HW_ID
packet to set Trace ID in the perf ETM decoders.

Applies to perf/core 

Changes since v7:
Split from original patchset [1] to be sent separately as kernel related
patches are now upstream.

[1] https://lore.kernel.org/linux-arm-kernel/20230116124928.5440-1-mike.leach@linaro.org/

Mike Leach (3):
  perf: cs-etm: Move mapping of Trace ID and cpu into helper function
  perf: cs-etm: Update record event to use new Trace ID protocol
  perf: cs-etm: Handle PERF_RECORD_AUX_OUTPUT_HW_ID packet

 tools/include/linux/coresight-pmu.h           |  47 ++-
 tools/perf/arch/arm/util/cs-etm.c             |  21 +-
 .../perf/util/cs-etm-decoder/cs-etm-decoder.c |   7 +
 tools/perf/util/cs-etm.c                      | 326 +++++++++++++++---
 tools/perf/util/cs-etm.h                      |  14 +-
 5 files changed, 350 insertions(+), 65 deletions(-)

-- 
2.32.0