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    SubjectRe: [PATCH v3 0/10] libperf and arm64 userspace counter access support
    On Sat, Sep 12, 2020 at 2:53 PM Jiri Olsa <jolsa@redhat.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

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