KVM: x86/mmu: Use SHADOW_NONPRESENT_VALUE for atomic zap in TDP MMU

Use SHADOW_NONPRESENT_VALUE when zapping TDP MMU SPTEs with mmu_lock held
for read, tdp_mmu_zap_spte_atomic() was simply missed during the initial
development.

Fixes: 7f01cab ("KVM: x86/mmu: Allow non-zero value for non-present SPTE and removed SPTE")
Signed-off-by: Isaku Yamahata <[email protected]>
[sean: write changelog]
Signed-off-by: Sean Christopherson <[email protected]>
Reviewed-by: Kai Huang <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: yamahata

arch/x86/kvm/mmu/tdp_mmu.c

@@ -626,7 +626,7 @@ static inline int tdp_mmu_zap_spte_atomic(struct kvm *kvm,
 	 * SPTEs.
 	 */
 	handle_changed_spte(kvm, iter->as_id, iter->gfn, iter->old_spte,
-			    0, iter->level, true);
+			    SHADOW_NONPRESENT_VALUE, iter->level, true);
 
 	return 0;
 }