[1/2] KVM: SVM: Handle MCEs early in the vmexit process

Commit Message

Joerg Roedel May 17, 2010, 12:43 p.m. UTC

None

Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index cea916f..f92d191 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1410,7 +1410,7 @@  static int nm_interception(struct vcpu_svm *svm)
 	return 1;
 }
 
-static int mc_interception(struct vcpu_svm *svm)
+static void svm_handle_mce(struct vcpu_svm *svm)
 {
 	/*
 	 * On an #MC intercept the MCE handler is not called automatically in
@@ -1420,6 +1420,11 @@  static int mc_interception(struct vcpu_svm *svm)
 		"int $0x12\n");
 	/* not sure if we ever come back to this point */
 
+	return;
+}
+
+static int mc_interception(struct vcpu_svm *svm)
+{
 	return 1;
 }
 
@@ -3183,6 +3188,14 @@  static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
 		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
 	}
+
+	/*
+	 * We need to handle MC intercepts here before the vcpu has a chance to
+	 * change the physical cpu
+	 */
+	if (unlikely(svm->vmcb->control.exit_code ==
+		     SVM_EXIT_EXCP_BASE + MC_VECTOR))
+		svm_handle_mce(svm);
 }
 
 #undef R