Messages in this thread | | | From | Will Deacon <> | Subject | Re: [PATCH] perf/arm-cmn: Reset DTM_PMU_CONFIG at probe | Date | Thu, 19 Jan 2023 19:08:43 +0000 |
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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
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