Re: [PATCH] KVM: nSVM: Optimize L12 to L2 vmcb.save copies

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 02/03/21 01:59, Sean Christopherson wrote:
> > +	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = vmcb12->save.cr2;
> Same question for VMCB_CR2.

Besides the question of how much AMD processors actually use the clean 
bits (a quick test suggests "not much"), in this specific case I suspect 
that the check would be more expensive than the savings from a memory load.

Paolo