KVM: SVM: Add clean-bit for DR6 and DR7

This patch implements the clean-bit for the dr6 and dr7
debug registers in the vmcb.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 0f55b8a69540..e9224ca090a1 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -193,6 +193,7 @@ enum {
         VMCB_INTR,       /* int_ctl, int_vector */
         VMCB_NPT,        /* npt_en, nCR3, gPAT */
         VMCB_CR,         /* CR0, CR3, CR4, EFER */
+        VMCB_DR,         /* DR6, DR7 */
         VMCB_DIRTY_MAX,
 };
 
@@ -1484,6 +1485,8 @@ static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
         else
                 svm->vmcb->save.dr7 = vcpu->arch.dr7;
 
+        mark_dirty(svm->vmcb, VMCB_DR);
+
         update_db_intercept(vcpu);
 }
 
@@ -1506,6 +1509,7 @@ static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
         struct vcpu_svm *svm = to_svm(vcpu);
 
         svm->vmcb->save.dr7 = value;
+        mark_dirty(svm->vmcb, VMCB_DR);
 }
 
 static int pf_interception(struct vcpu_svm *svm)