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Re: [PATCH] target/arm/helper: Propagate MDCR_EL2.HPMN into PMCR_EL0.N
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From: |
Peter Maydell |
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Subject: |
Re: [PATCH] target/arm/helper: Propagate MDCR_EL2.HPMN into PMCR_EL0.N |
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Date: |
Mon, 18 Dec 2023 15:05:46 +0000 |
On Fri, 15 Dec 2023 at 15:16, Jean-Philippe Brucker
<jean-philippe@linaro.org> wrote:
>
> MDCR_EL2.HPMN allows an hypervisor to limit the number of PMU counters
> available to EL1 and EL0 (to keep the others to itself). QEMU already
> implements this split correctly, except for PMCR_EL0.N reads: the number
> of counters read by EL1 or EL0 should be the one configured in
> MDCR_EL2.HPMN.
>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Applied to target-arm.next for 9.0, thanks. I've added a
Cc: qemu-stable@nongnu.org because it seems a fix worth
backporting.
-- PMM