kernel/tools/perf/arch/arm/util, branch linux-rolling-stable

perf auxtrace: Remove errno.h from auxtrace.h and fix transitive dependencies

2025-11-14T07:03:11Z

errno.h isn't used in auxtrace.h so remove it and fix build failures caused by transitive dependencies through auxtrace.h on errno.h. Signed-off-by: Ian Rogers Reviewed-by: James Clark Signed-off-by: Namhyung Kim

perf build: Remove NO_AUXTRACE build option

2025-11-14T07:03:11Z

The NO_AUXTRACE build option was used when the __get_cpuid feature test failed or if it was provided on the command line. The option no longer avoids a dependency on a library and so having the option is just adding complexity to the code base. Remove the option CONFIG_AUXTRACE from Build files and HAVE_AUXTRACE_SUPPORT by assuming it is always defined. Signed-off-by: Ian Rogers Reviewed-by: James Clark Signed-off-by: Namhyung Kim

perf cpumap: Increment reference count for online cpumap

2025-03-19T23:56:33Z

Thomas Richter reported a double put on the cpumap for the placeholder core PMU: https://lore.kernel.org/lkml/20250318095132.1502654-3-tmricht@linux.ibm.com/ Requiring the caller to get the cpumap is not how these things are usually done, switch cpu_map__online to do the get and then fix up any use cases where a put is needed. Signed-off-by: Ian Rogers Tested-by: Thomas Richter Link: https://lore.kernel.org/r/20250318171914.145616-1-irogers@google.com Signed-off-by: Namhyung Kim

perf tools: Fix compile error on sample->user_regs

2025-02-14T20:33:41Z

It's recently changed to allocate dynamically but misses to update some arch-dependent codes to use perf_sample__user_regs(). Fixes: dc6d2bc2d893a878 ("perf sample: Make user_regs and intr_regs optional") Reported-by: Stephen Rothwell Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250214191641.756664-1-namhyung@kernel.org Signed-off-by: Namhyung Kim

perf arm: Remove dwarf-regs.c

2024-11-09T16:39:13Z

The file just provides the function get_arch_regstr, however, if in the only caller get_dwarf_regstr EM_HOST is used for the EM_NONE case the function can never be called. So remove as dead code. Tidy up the EM_NONE cases for arm in dwarf-regs.c. Reviewed-by: Masami Hiramatsu (Google) Signed-off-by: Ian Rogers Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.org Cc: linux-riscv@lists.infradead.org Cc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.org Link: https://lore.kernel.org/r/20241108234606.429459-10-irogers@google.com Signed-off-by: Namhyung Kim

perf build: Rename CONFIG_DWARF to CONFIG_LIBDW

2024-10-18T17:17:40Z

In Makefile.config for unwinding the name dwarf implies either libunwind or libdw. Make it clearer that CONFIG_DWARF is really just defined when libdw is present by renaming to CONFIG_LIBDW. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Tested-by: Leo Yan Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.org Cc: linux-riscv@lists.infradead.org Cc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.org Link: https://lore.kernel.org/r/20241017001354.56973-12-irogers@google.com Signed-off-by: Namhyung Kim

perf: cs-etm: Only save valid trace IDs into files

2024-08-29T18:55:52Z

This isn't a bug because Perf always masks with CORESIGHT_TRACE_ID_VAL_MASK before using these values, but to avoid it looking like it could be, make an effort to not save bad values. Reviewed-by: Mike Leach Signed-off-by: James Clark Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexandre Torgue Cc: Anshuman Khandual Cc: Ganapatrao Kulkarni Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Maxime Coquelin Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: Will Deacon Link: https://lore.kernel.org/r/20240722101202.26915-6-james.clark@linaro.org Signed-off-by: Arnaldo Carvalho de Melo

perf: cs-etm: Create decoders based on the trace ID mappings

2024-08-29T18:55:24Z

Now that each queue has a unique set of trace ID mappings, use this list to create the decoders. In unformatted mode just add a single mapping so only one decoder is made. Previously each queue would have a decoder created for each traced CPU on the system but this won't work anymore because CPUs can have overlapping trace IDs. This also means that the CORESIGHT_TRACE_ID_UNUSED_FLAG isn't needed any more. If mappings aren't added then decoders aren't created, rather than needing a flag to suppress creation. Reviewed-by: Mike Leach Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexandre Torgue Cc: Anshuman Khandual Cc: Ganapatrao Kulkarni Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Maxime Coquelin Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: Will Deacon Link: https://lore.kernel.org/r/20240722101202.26915-5-james.clark@linaro.org Signed-off-by: James Clark Signed-off-by: Arnaldo Carvalho de Melo

perf auxtrace: Remove unused 'pmu' pointer from struct auxtrace_record

2024-08-28T21:15:16Z

The 'pmu' pointer in the auxtrace_record structure is not used after support multiple AUX events, remove it. Reviewed-by: Adrian Hunter Signed-off-by: Leo Yan Cc: Ian Rogers Cc: James Clark Cc: Kan Liang Cc: Mike Leach Cc: Namhyung Kim Cc: Suzuki Poulouse Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20240806204130.720977-3-leo.yan@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Enable evsel__is_aux_event() to work for ARM/ARM64

2024-07-31T19:58:18Z

Set pmu->auxtrace on ARM/ARM64 AUX area PMUs. evsel__is_aux_event() needs the setting to identify AUX area tracing selected events. Currently, the features that use evsel__is_aux_event() are used only by Intel PT, but that may change in the future. Reviewed-by: Andi Kleen Reviewed-by: Leo Yan Signed-off-by: Adrian Hunter Acked-by: Ian Rogers Cc: Alexander Shishkin Cc: Heiko Carstens Cc: Hendrik Brueckner Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Jonathan Cameron Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: Thomas Richter Cc: Will Deacon Cc: Yicong Yang Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20240715160712.127117-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo