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Re: [PATCH v3 2/2] hvf: arm: Handle unknown ID registers as RES0
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From: |
Peter Maydell |
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Subject: |
Re: [PATCH v3 2/2] hvf: arm: Handle unknown ID registers as RES0 |
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Date: |
Wed, 16 Feb 2022 17:32:20 +0000 |
On Wed, 9 Feb 2022 at 12:41, Alexander Graf <agraf@csgraf.de> wrote:
>
> Recent Linux versions added support to read ID_AA64ISAR2_EL1. On M1,
> those reads trap into QEMU which handles them as faults.
>
> However, AArch64 ID registers should always read as RES0. Let's
> handle them accordingly.
>
> This fixes booting Linux 5.17 guests.
>
> Cc: qemu-stable@nongnu.org
> Reported-by: Ivan Babrou <ivan@cloudflare.com>
> Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM