kvm_s390_pv_create_cpu
r = kvm_s390_pv_create_cpu(vcpu, rc, rrc);
rc = kvm_s390_pv_create_cpu(vcpu, &uvrc, &uvrrc);
int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);