Re: [PATCH v2] KVM: x86: use again the flush argument of __link_shadow_page()

[Sean Christopherson]

On Tue, May 12, 2026, Paolo Bonzini wrote:
> Except in the case of parentless nested-TDP pages, mmu_page_zap_pte()
> clears the SPTE but leaves the invalid_list empty.  In this case, using
> kvm_flush_remote_tlbs() as kvm_mmu_remote_flush_or_zap() does is overkill.
> Avoid flushing the entirety of the remote TLBs unless the invalid_list
> was populated: instead, use a more efficient gfn-targeting flush (if
> available) and skip it altogether if the caller guarantees that a TLB
> flush is not necessary.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>