+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);
+}
+