Re: [PATCH 42/43] KVM: VMX: Drop VMWRITEs to zero fields at vCPU RESET

[Jim Mattson]

On Mon, May 24, 2021 at 2:15 PM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>
> On 24/04/21 02:46, Sean Christopherson wrote:
> > Don't waste time writing zeros via VMWRITE during vCPU RESET, the VMCS
> > is zero allocated.
>
> Is this guaranteed to be valid, or could the VMCS in principle use some
> weird encoding? (Like it does for the access rights, even though this
> does not matter for this patch).

I see nothing in the SDM that would indicate that zero must be encoded as zero.