diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index be3b4a073e728af3bfbfce03bc7c75d509d31261..d4f1dff258cc69069ded320a9b33f8ef7406df02 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -828,9 +828,12 @@ int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3)
 		}
 	}
 
-	memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs));
-	kvm_register_mark_dirty(vcpu, VCPU_EXREG_PDPTR);
-	kvm_make_request(KVM_REQ_LOAD_MMU_PGD, vcpu);
+	kvm_register_mark_available(vcpu, VCPU_EXREG_PDPTR);
+	if (memcmp(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs))) {
+		memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs));
+		kvm_register_mark_dirty(vcpu, VCPU_EXREG_PDPTR);
+		kvm_make_request(KVM_REQ_LOAD_MMU_PGD, vcpu);
+	}
 	vcpu->arch.pdptrs_from_userspace = false;
 
 	return 1;