kvm_s390_keyop
struct kvm_s390_keyop kop;
r = kvm_s390_keyop(mc, kvm, kop.operation, kop.guest_addr, skey);
#define KVM_S390_KEYOP _IOWR(KVMIO, 0x53, struct kvm_s390_keyop)
#define KVM_S390_KEYOP _IOWR(KVMIO, 0x53, struct kvm_s390_keyop)
struct kvm_s390_keyop keyop = {