emulate_rdmsr
if (emulate_rdmsr(vcpu, ecx, &retu)) {
error = emulate_rdmsr(vcpu, ecx, &retu);
error = emulate_rdmsr(vcpu, vme->u.msr.code, &val);
int emulate_rdmsr(struct vcpu *vcpu, uint32_t code, uint64_t *val);