> diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c > index 025b1f2..4719ecb 100644 > --- a/arch/s390/kvm/vsie.c > +++ b/arch/s390/kvm/vsie.c > @@ -117,6 +117,8 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) > newflags |= cpuflags & CPUSTAT_SM; > if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IBS)) > newflags |= cpuflags & CPUSTAT_IBS; > + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_KSS)) > + newflags |= cpuflags & CPUSTAT_KSS; > > atomic_set(&scb_s->cpuflags, newflags); > return 0; > @@ -289,7 +291,9 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) > * bits. Therefore we cannot provide interpretation and would later > * have to provide own emulation handlers. > */ > - scb_s->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; > + if (!(atomic_read(&scb_s->cpuflags) & CPUSTAT_KSS)) > + scb_s->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; > + What would actually happen, if ICTL_ISKE | ICTL_SSKE | ICTL_RRBE remain set? I assume KSS will dominate? Or are there any validity interceptions defined for this? -- Thanks, David
