On 18.02.20 10:38, David Hildenbrand wrote: [...] set_kvm_facility(kvm->arch.model.fac_mask, 65); >> >> + if (is_prot_virt_host()) { >> + set_kvm_facility(kvm->arch.model.fac_mask, 161); >> + set_kvm_facility(kvm->arch.model.fac_list, 161); >> + } >> + > > Aren't these IPL subcodes completely emulated in QEMU? If so, rather > QEMU with support should enable them when the kernel capability for PV > (=== is_prot_virt_host()) is in place. ack. will drop this patch.