KVM: SVM: Add clean-bit for interrupt state

This patch implements the clean-bit for all interrupt
related state in the vmcb. This corresponds to vmcb offset
0x60-0x67.

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 e188d9e..748569e 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -190,10 +190,12 @@ enum {
                            pause filter count */
        VMCB_PERM_MAP,   /* IOPM Base and MSRPM Base */
        VMCB_ASID,       /* ASID */
+       VMCB_INTR,       /* int_ctl, int_vector */
        VMCB_DIRTY_MAX,
 };
 
-#define VMCB_ALWAYS_DIRTY_MASK 0U
+/* TPR is always written before VMRUN */
+#define VMCB_ALWAYS_DIRTY_MASK (1U << VMCB_INTR)
 
 static inline void mark_all_dirty(struct vmcb *vmcb)
 {
@@ -2508,6 +2510,8 @@ static int clgi_interception(struct vcpu_svm *svm)
        svm_clear_vintr(svm);
        svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
 
+       mark_dirty(svm->vmcb, VMCB_INTR);
+
        return 1;
 }
 
@@ -2878,6 +2882,7 @@ static int interrupt_window_interception(struct vcpu_svm *svm)
        kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
        svm_clear_vintr(svm);
        svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
+       mark_dirty(svm->vmcb, VMCB_INTR);
        /*
         * If the user space waits to inject interrupts, exit as soon as
         * possible
@@ -3169,6 +3174,7 @@ static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
        control->int_ctl &= ~V_INTR_PRIO_MASK;
        control->int_ctl |= V_IRQ_MASK |
                ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
+       mark_dirty(svm->vmcb, VMCB_INTR);
 }
 
 static void svm_set_irq(struct kvm_vcpu *vcpu)