[PATCH v2] perf/arm-cmn: Fix multi-filter encoding

[Will Deacon]

On Tue, 15 Sep 2026 13:24:22 +0100, Robin Murphy wrote:
> The current special-case for EVICT_STATE_SEL filtering effectively
> assigns the "filter" and "filter2" controls in the opposite order from
> how the CMN S3 r2 TRM states "Filtering is programmed in pmu_hbt_lbt_sel
> and pmu_evict_state_sel". On reflection, not only does this seem
> unnecessarily non-obvious to users, but it's also likely to be a problem
> for scaling to a full multi-filter abstraction in future. There is a
> logical order to filters based on their bitfield positions in the
> pmu_event_sel register, which the TRM descriptions allude to, and the
> cmn_filter_select enum already (almost) follows, so let's fix the UABI
> to follow suit while it's still unreleased.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] perf/arm-cmn: Fix multi-filter encoding
      https://git.kernel.org/arm64/c/406aa2b186d3

Cheers,
-- 
Will

https://fixes.arm64.dev
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