Commit 734e45b3 authored by Ben Gardon's avatar Ben Gardon Committed by Paolo Bonzini
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KVM: x86/mmu: Don't redundantly clear TDP MMU pt memory 



The KVM MMU caches already guarantee that shadow page table memory will
be zeroed, so there is no reason to re-zero the page in the TDP MMU page
fault handler.

No functional change intended.

Reviewed-by: default avatarPeter Feiner <pfeiner@google.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Acked-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarBen Gardon <bgardon@google.com>
Message-Id: <20210202185734.1680553-5-bgardon@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3a9a4aa5

arch/x86/kvm/mmu/tdp_mmu.c

+0 −1
Original line number Diff line number Diff line
@@ -655,7 +655,6 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, 
			sp = alloc_tdp_mmu_page(vcpu, iter.gfn, iter.level);

			list_add(&sp->link, &vcpu->kvm->arch.tdp_mmu_pages);

			child_pt = sp->spt;

			clear_page(child_pt);

			new_spte = make_nonleaf_spte(child_pt,

						     !shadow_accessed_mask);