Re: [PATCH] perf/arm-cmn: Reset DTM_PMU_CONFIG at probe

[Will Deacon]

On Mon, 5 Dec 2022 19:46:13 +0000, Robin Murphy wrote:
> Although we treat the DTM counters as free-running such that we're not
> too concerned about the initial DTM state, it's possible for a previous
> user to have left DTM counters enabled and paired with DTC counters.
> Thus if the first events are scheduled using some, but not all, DTMs,
> the as-yet-unused ones could end up adding spurious increments to the
> event counts at the DTC. Make sure we sync our initial DTM_PMU_CONFIG
> state to all the DTMs at probe time to avoid that possibility.
> 
> [...]

Applied to will (for-next/perf), thanks!

[1/1] perf/arm-cmn: Reset DTM_PMU_CONFIG at probe
      https://git.kernel.org/will/c/bb21ef19a3d8

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev