linux-kernel - Re: [PATCH v3 0/10] libperf and arm64 userspace counter access support

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Message-ID: <CAL_JsqKwMh9=ppdbY0sAQ8C--aH_XcJR3G4YCq7afAHnfTF9fw@mail.gmail.com>
Date:   Mon, 14 Sep 2020 08:21:10 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Raphael Gault <raphael.gault@....com>,
        Mark Rutland <mark.rutland@....com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Ian Rogers <irogers@...gle.com>,
        Honnappa Nagarahalli <honnappa.nagarahalli@....com>
Subject: Re: [PATCH v3 0/10] libperf and arm64 userspace counter access support

On Sat, Sep 12, 2020 at 2:53 PM Jiri Olsa <jolsa@...hat.com> wrote:
>
> On Fri, Sep 11, 2020 at 03:51:08PM -0600, Rob Herring wrote:
> > This is resurrecting Raphael's series[1] to enable userspace counter
> > access on arm64. My previous versions are here[2][3].
> >
> > Changes in v3:
> >  - Dropped removing x86 rdpmc test until libperf tests can run via 'perf test'
> >  - Added verbose prints for tests
> >  - Split adding perf_evsel__mmap() to separate patch
>
> hi,
> which commit/branch did you base on? I can't apply arm bits:
>
> Applying: arm64: pmu: Add hook to handle pmu-related undefined instructions
> Applying: arm64: perf: Enable pmu counter direct access for perf event on armv8
> error: patch failed: arch/arm64/kernel/perf_event.c:836
> error: arch/arm64/kernel/perf_event.c: patch does not apply
> Patch failed at 0002 arm64: perf: Enable pmu counter direct access for perf event on armv8

It's on v5.9-rc2.

Rob