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Re: [Qemu-ppc] [PATCH] spapr/xive: Mask the EAS when allocating an IRQ

From: Peter Maydell
Subject: Re: [Qemu-ppc] [PATCH] spapr/xive: Mask the EAS when allocating an IRQ
Date: Tue, 13 Aug 2019 17:46:04 +0100

On Tue, 13 Aug 2019 at 17:44, Cédric Le Goater <address@hidden> wrote:
> If an IRQ is allocated and not configured, such as a MSI requested by
> a PCI driver, it can be saved in its default state and possibly later
> on restored using the same state. If not initially MASKED, KVM will
> try to find a matching priority/target tuple for the interrupt and
> fail to restore the VM because 0/0 is not a valid target.
> When allocating a IRQ number, the EAS should be set to a sane default :
> Reported-by: Satheesh Rajendran <address@hidden>
> Signed-off-by: Cédric Le Goater <address@hidden>
> ---
>  David, this fixes a "virsh save/restore" issue in certain configurations
>  of CPU topology which never showed up before :/
>  Peter, I was busy on a KVM/passthru issue and lacked the time to
>  investigate all ... you decide.

rc5 has been tagged so this is definitely too late for 4.1.

-- PMM

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