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>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 748569ef8505..5038201d6f3d 100644
--- a/arch/x86/kvm/svm.c
+++ b/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;