[16/23] KVM: handle emulation failure case first.

Commit Message

Gleb Natapov April 27, 2010, 12:15 p.m. UTC

None

Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4f0a0a1..f1ebeed 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3857,22 +3857,6 @@  int emulate_instruction(struct kvm_vcpu *vcpu,
 
 restart:
 	r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
-	shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
-
-	if (r == 0)
-		kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
-
-	if (vcpu->arch.pio.count) {
-		if (!vcpu->arch.pio.in)
-			vcpu->arch.pio.count = 0;
-		return EMULATE_DO_MMIO;
-	}
-
-	if (vcpu->mmio_needed) {
-		if (vcpu->mmio_is_write)
-			vcpu->mmio_needed = 0;
-		return EMULATE_DO_MMIO;
-	}
 
 	if (r) { /* emulation failed */
 		/*
@@ -3888,6 +3872,21 @@  restart:
 		return EMULATE_FAIL;
 	}
 
+	shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
+	kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
+
+	if (vcpu->arch.pio.count) {
+		if (!vcpu->arch.pio.in)
+			vcpu->arch.pio.count = 0;
+		return EMULATE_DO_MMIO;
+	}
+
+	if (vcpu->mmio_needed) {
+		if (vcpu->mmio_is_write)
+			vcpu->mmio_needed = 0;
+		return EMULATE_DO_MMIO;
+	}
+
 	if (vcpu->arch.exception.pending)
 		vcpu->arch.emulate_ctxt.restart = false;