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Re: [PATCH] hw/arm/virt: Disable pl011 clock migration if needed


From: Peter Maydell
Subject: Re: [PATCH] hw/arm/virt: Disable pl011 clock migration if needed
Date: Fri, 19 Mar 2021 10:37:29 +0000

On Thu, 18 Mar 2021 at 02:38, Gavin Shan <gshan@redhat.com> wrote:
>
> A clock is added by commit aac63e0e6ea3 ("hw/char/pl011: add a clock
> input") since v5.2.0 which corresponds to virt-5.2 machine type. It
> causes backwards migration failure from upstream to downstream (v5.1.0)
> when the machine type is specified with virt-5.1.
>
> This fixes the issue by following instructions from section "Connecting
> subsections to properties" in docs/devel/migration.rst. With this applied,
> the PL011 clock is migrated based on the machine type.
>
>    virt-5.2 or newer:  migration
>    virt-5.1 or older:  non-migration
>
> Cc: qemu-stable@nongnu.org # v5.2.0+
> Fixes: aac63e0e6ea3 ("hw/char/pl011: add a clock input")
> Suggested-by: Andrew Jones <drjones@redhat.com>
> Signed-off-by: Gavin Shan <gshan@redhat.com>



Applied to target-arm.next, thanks.

-- PMM



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