KVM: SVM: Add clean-bit for NPT state

This patch implements the clean-bit for all nested paging
related state in the vmcb.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/svm.c

@@ -191,6 +191,7 @@ enum {
 	VMCB_PERM_MAP,   /* IOPM Base and MSRPM Base */
 	VMCB_ASID,	 /* ASID */
 	VMCB_INTR,	 /* int_ctl, int_vector */
+	VMCB_NPT,        /* npt_en, nCR3, gPAT */
 	VMCB_DIRTY_MAX,
 };
 
@@ -1749,6 +1750,7 @@ static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
 	struct vcpu_svm *svm = to_svm(vcpu);
 
 	svm->vmcb->control.nested_cr3 = root;
+	mark_dirty(svm->vmcb, VMCB_NPT);
 	force_new_asid(vcpu);
 }
 
@@ -3555,6 +3557,7 @@ static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
 	struct vcpu_svm *svm = to_svm(vcpu);
 
 	svm->vmcb->control.nested_cr3 = root;
+	mark_dirty(svm->vmcb, VMCB_NPT);
 
 	/* Also sync guest cr3 here in case we live migrate */
 	svm->vmcb->save.cr3 = vcpu->arch.cr3;