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    SubjectRe: [PATCH v4 7/8] perf: Add perf_event_attr::config3
    On Mon, Jan 09, 2023 at 01:26:23PM -0600, Rob Herring wrote:
    > Arm SPEv1.2 adds another 64-bits of event filtering control. As the
    > existing perf_event_attr::configN fields are all used up for SPE PMU, an
    > additional field is needed. Add a new 'config3' field.
    >
    > Tested-by: James Clark <james.clark@arm.com>
    > Signed-off-by: Rob Herring <robh@kernel.org>
    > ---
    > There's still an unresolved discussion about validating 'config3' with
    > the options laid out here[1].
    >
    > v4:
    > - Rebase on v6.2-rc1
    > v3:
    > - No change
    > v2:
    > - Drop tools/ side update
    >
    > [1] https://lore.kernel.org/all/Y49ttrv6W5k3ZNYw@FVFF77S0Q05N.cambridge.arm.com/
    > ---
    > include/uapi/linux/perf_event.h | 3 +++
    > 1 file changed, 3 insertions(+)
    >
    > diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
    > index ccb7f5dad59b..37675437b768 100644
    > --- a/include/uapi/linux/perf_event.h
    > +++ b/include/uapi/linux/perf_event.h
    > @@ -374,6 +374,7 @@ enum perf_event_read_format {
    > #define PERF_ATTR_SIZE_VER5 112 /* add: aux_watermark */
    > #define PERF_ATTR_SIZE_VER6 120 /* add: aux_sample_size */
    > #define PERF_ATTR_SIZE_VER7 128 /* add: sig_data */
    > +#define PERF_ATTR_SIZE_VER8 136 /* add: config3 */
    >
    > /*
    > * Hardware event_id to monitor via a performance monitoring event:
    > @@ -515,6 +516,8 @@ struct perf_event_attr {
    > * truncated accordingly on 32 bit architectures.
    > */
    > __u64 sig_data;
    > +
    > + __u64 config3; /* extension of config2 */
    > };

    Yeah, that was bound to happen I suppose..

    Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

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