KVM: SVM: Add clean-bit for LBR state

This patch implements the clean-bit for all LBR related
state. This includes the debugctl, br_from, br_to,
last_excp_from, and last_excp_to msrs.

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

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d2ddad9ca630ca2a0cd9b2fd12ac206ead2cd5db..58cabb550afd62995e3121ac8d246bc985cc2d0d 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -197,6 +197,7 @@ enum {
        VMCB_DT,         /* GDT, IDT */
        VMCB_SEG,        /* CS, DS, SS, ES, CPL */
        VMCB_CR2,        /* CR2 only */
+       VMCB_LBR,        /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
        VMCB_DIRTY_MAX,
 };
 
@@ -2847,6 +2848,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
                        return 1;
 
                svm->vmcb->save.dbgctl = data;
+               mark_dirty(svm->vmcb, VMCB_LBR);
                if (data & (1ULL<<0))
                        svm_enable_lbrv(svm);
                else