[PATCH] perf arm-spe: Don't warn about the discard bit if it doesn't exist

[Ian Rogers]

On Wed, May 13, 2026 at 3:20 AM Leo Yan <leo.yan at arm.com> wrote:
>
> On Fri, Apr 10, 2026 at 12:05:12PM +0100, James Clark wrote:
> > Opening an SPE event shows a warning that doesn't concern the user:
> >
> >   $ perf record -e arm_spe
> >   Unknown/empty format name: discard
> >
> > Perf only wants to know if the discard bit is set for configuring the
> > event, not in response to anything the user has done. Fix it by adding
> > another helper that returns if a config bit exists without warning.
> >
> > We should probably keep the warning in evsel__get_config_val() to avoid
> > having every caller having to do it, and most format bits should never
> > be missing.
> >
> > Add a test for the new helper. Rename the parent test function to be
> > more generic rather than adding a new one as it requires a lot of
> > boilerplate.
> >
> > Signed-off-by: James Clark <james.clark at linaro.org>
>
> Reviewed-by: Leo Yan <leo.yan at arm.com>

Reviewed-by: Ian Rogers <irogers at google.com>

Thanks,
Ian