CPUSTAT_KSS
kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
if (kvm_s390_test_cpuflags(vcpu, CPUSTAT_KSS))
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_KSS);
newflags |= cpuflags & CPUSTAT_KSS;
if (!(atomic_read(&scb_s->cpuflags) & CPUSTAT_KSS))
sie_block->cpuflags &= ~CPUSTAT_KSS;
TEST_ASSERT_EQ(0, sie_block->cpuflags & CPUSTAT_KSS);