CPUSTAT_ECALL_PEND
if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND);