KVM: SVM: Clean up VINTR setting

The current VINTR intercept setters don't look clean to me. To make
the code easier to read and enable the possibilty to trap on a VINTR
set, this uses a helper function to set the VINTR intercept.

v2 uses two distinct functions for setting and clearing the bit

Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 15 insertions, 5 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index a9e769e4e251..33407d95761f 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -718,6 +718,16 @@ static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
         to_svm(vcpu)->vmcb->save.rflags = rflags;
 }
 
+static void svm_set_vintr(struct vcpu_svm *svm)
+{
+        svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR;
+}
+
+static void svm_clear_vintr(struct vcpu_svm *svm)
+{
+        svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
+}
+
 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
 {
         struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
@@ -1380,7 +1390,7 @@ static int interrupt_window_interception(struct vcpu_svm *svm,
 {
         KVMTRACE_0D(PEND_INTR, &svm->vcpu, handler);
 
-        svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
+        svm_clear_vintr(svm);
         svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
         /*
          * If the user space waits to inject interrupts, exit as soon as
@@ -1593,7 +1603,7 @@ static void svm_intr_assist(struct kvm_vcpu *vcpu)
             (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) ||
             (vmcb->control.event_inj & SVM_EVTINJ_VALID)) {
                 /* unable to deliver irq, set pending irq */
-                vmcb->control.intercept |= (1ULL << INTERCEPT_VINTR);
+                svm_set_vintr(svm);
                 svm_inject_irq(svm, 0x0);
                 goto out;
         }
@@ -1652,9 +1662,9 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
          */
         if (!svm->vcpu.arch.interrupt_window_open &&
             (svm->vcpu.arch.irq_summary || kvm_run->request_interrupt_window))
-                control->intercept |= 1ULL << INTERCEPT_VINTR;
-         else
-                control->intercept &= ~(1ULL << INTERCEPT_VINTR);
+                svm_set_vintr(svm);
+        else
+                svm_clear_vintr(svm);
 }
 
 static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)