Re: [PATCH 07/17] KVM: x86/tdp_mmu: Centralize updates to present external PTEs

[Huang, Kai]

> @@ -1373,6 +1396,9 @@ static void kvm_tdp_mmu_age_spte(struct kvm *kvm, struct tdp_iter *iter)
>  {
>  	u64 new_spte;
>  
> +	if (WARN_ON_ONCE(is_mirror_sptep(iter->sptep)))
> +		return;
> +
>  	if (spte_ad_enabled(iter->old_spte)) {
>  		iter->old_spte = tdp_mmu_clear_spte_bits_atomic(iter->sptep,
>  								shadow_accessed_mask);

AFAICT this chunk isn't related to "Centralize updates to present external
PTEs"?  Should it be in a separate patch?