X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=blobdiff_plain;f=arch%2Fx86%2Fkvm%2Fsvm%2Fsvm.c;h=ddcb7390bb0e74ce9851432d6706e45d82222a7c;hp=983b993c949bb0a4fbcbf672626a24f01f1c5348;hb=f27ad38aac23263c;hpb=2985afbcdbb1957a8d31992cebbc4e49d2ad8a77

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 983b993c949b..ddcb7390bb0e 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2450,6 +2450,31 @@ static int cr_interception(struct vcpu_svm *svm)
 	return kvm_complete_insn_gp(&svm->vcpu, err);
 }
 
+static int cr_trap(struct vcpu_svm *svm)
+{
+	struct kvm_vcpu *vcpu = &svm->vcpu;
+	unsigned long old_value, new_value;
+	unsigned int cr;
+
+	new_value = (unsigned long)svm->vmcb->control.exit_info_1;
+
+	cr = svm->vmcb->control.exit_code - SVM_EXIT_CR0_WRITE_TRAP;
+	switch (cr) {
+	case 0:
+		old_value = kvm_read_cr0(vcpu);
+		svm_set_cr0(vcpu, new_value);
+
+		kvm_post_set_cr0(vcpu, old_value, new_value);
+		break;
+	default:
+		WARN(1, "unhandled CR%d write trap", cr);
+		kvm_queue_exception(vcpu, UD_VECTOR);
+		return 1;
+	}
+
+	return kvm_complete_insn_gp(vcpu, 0);
+}
+
 static int dr_interception(struct vcpu_svm *svm)
 {
 	int reg, dr;
@@ -2997,6 +3022,7 @@ static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
 	[SVM_EXIT_XSETBV]			= xsetbv_interception,
 	[SVM_EXIT_RDPRU]			= rdpru_interception,
 	[SVM_EXIT_EFER_WRITE_TRAP]		= efer_trap,
+	[SVM_EXIT_CR0_WRITE_TRAP]		= cr_trap,
 	[SVM_EXIT_INVPCID]                      = invpcid_interception,
 	[SVM_EXIT_NPF]				= npf_interception,
 	[SVM_EXIT_RSM]                          = rsm_interception,