On Mon, Nov 03, 2025 at 02:33:22PM +0000, Will Deacon wrote:
> On Wed, Oct 29, 2025 at 03:46:01PM +0000, James Clark wrote:
> > Arm FEAT_SPE_FDS adds the ability to filter on the data source of a
> > packet using 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 'config4' field.
> >
> > Reviewed-by: Leo Yan <leo.yan@arm.com>
> > Tested-by: Leo Yan <leo.yan@arm.com>
> > Reviewed-by: Ian Rogers <irogers@google.com>
> > Signed-off-by: James Clark <james.clark@linaro.org>
> > ---
> > include/uapi/linux/perf_event.h | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
> > index 78a362b80027..0d0ed85ad8cb 100644
> > --- a/include/uapi/linux/perf_event.h
> > +++ b/include/uapi/linux/perf_event.h
> > @@ -382,6 +382,7 @@ enum perf_event_read_format {
> > #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 */
> > +#define PERF_ATTR_SIZE_VER9 144 /* add: config4 */
> >
> > /*
> > * 'struct perf_event_attr' contains various attributes that define
> > @@ -543,6 +544,7 @@ struct perf_event_attr {
> > __u64 sig_data;
> >
> > __u64 config3; /* extension of config2 */
> > + __u64 config4; /* extension of config3 */
>
> Please can one of the core perf maintainers ack/nak this extension?
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>