linux-kernel - Re: [PATCH v2 0/3] Support register names of all architectures

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Message-ID: <YbibkI8NE81Qo5q6@kernel.org>
Date:   Tue, 14 Dec 2021 10:26:40 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
Cc:     German Gomez <german.gomez@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 0/3] Support register names of all architectures

Em Tue, Dec 14, 2021 at 02:20:26PM +0530, Athira Rajeev escreveu:
> 
> 
> > On 07-Dec-2021, at 11:36 PM, German Gomez <german.gomez@....com> wrote:
> > 
> > The following changeset applies some corrections to the way system
> > registers are processed and presented when reading perf.data files using
> > the various perf tools.
> > 
> > The commit message from [3/3] shows how register names aren't correctly
> > presented when performing x-arch analysis of perf.data files (recording
> > in one arch, then reading the file from a different arch).
> > 
> >  - [PATCH 1/3] Fixes a potential out-of-bounds access when reading the
> >    values of the registers in the perf.data file.
> >  - [PATCH 2/3] Fixes an issue of ARM and ARM64 registers having the
> >    same enum name.
> >  - [PATCH 3/3] Refactors the function "perf_reg_name" declared in the
> >   "tools/perf/util/perf_regs.h" header, in order to support every arch.
> > 
> > Thanks,
> > German
> 
> Looks good to me. Tested this patchset in powerpc by capturing regs in powerpc and doing
> perf report to read the data from x86.
> 
> Reviewed-and-Tested-by: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>

Thanks, added to the commit log message.

- Arnaldo

> > --
> > Changes since v1
> > 
> >  - Added "Reported-by" tags.
> >  - Removed [PATCH 2/4] because it's not needed (suggested by Athira
> >    Rajeev).
> >  - Removed [PATCH 3/4] which created additional header files with the
> >    register names of every arch.
> >  - Introduced [PATCH 2/3] to deal with ARM and ARM64 registers having the
> >    same enum name across "/tools/perf/".
> >  - Reworked the refactor of "perf_reg_name" function (now implemented in
> >    perf_regs.c, rather than in the header file) in [PATCH 3/3].
> > 
> > German Gomez (3):
> >  perf tools: Prevent out-of-bounds access to registers
> >  perf tools: Rename perf_event_arm_regs for ARM64 registers
> >  perf tools: Support register names from all archs
> > 
> > tools/perf/arch/arm/include/perf_regs.h       |  42 --
> > tools/perf/arch/arm64/include/perf_regs.h     |  78 +-
> > tools/perf/arch/csky/include/perf_regs.h      |  82 ---
> > tools/perf/arch/mips/include/perf_regs.h      |  69 --
> > tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
> > tools/perf/arch/riscv/include/perf_regs.h     |  74 --
> > tools/perf/arch/s390/include/perf_regs.h      |  78 --
> > tools/perf/arch/x86/include/perf_regs.h       |  82 ---
> > tools/perf/builtin-script.c                   |  18 +-
> > tools/perf/util/event.h                       |   5 +-
> > tools/perf/util/libunwind/arm64.c             |   2 +
> > tools/perf/util/perf_regs.c                   | 671 +++++++++++++++++-
> > tools/perf/util/perf_regs.h                   |  10 +-
> > .../scripting-engines/trace-event-python.c    |  10 +-
> > tools/perf/util/session.c                     |  25 +-
> > 15 files changed, 709 insertions(+), 603 deletions(-)
> > 
> > -- 
> > 2.25.1
> > 

-- 

- Arnaldo