Re: [PATCH] KVM: arm64: Pend host SErrors for protected vCPUs through HCR_EL2.VSE

[Fuad Tabba]

Hi Marc, Oliver,

On Mon, 05 Oct 2026 09:30:39 +0100, Marc Zyngier <maz@xxxxxxxxxx> wrote:
[...]
> I thought we had discussed that one before (or am I making things
> up?). Why can't the host always evaluate serror_is_masked() as true?
> Given that PSTATE is never synced back to the host, it would only be a
> matter of set PSTATE.A==1 at vcpu creation time.
>
> It'd be more palatable than this sprinkling of vcpu_is_protected(),
> which really do not scale.

Yes, it's better for the host to always see SErrors as masked. v2 will
do that when the hyp vCPU is created, and leave
kvm_inject_serror_esr() alone.

Cheers,
/fuad