Am 12.09.18 um 22:08 schrieb Tony Krowiak: > A new CPU model feature and two new CPU model facilities are > introduced to support AP devices for a KVM guest. > > CPU model features: > > 1. The KVM_S390_VM_CPU_FEAT_AP CPU model feature indicates that > AP facilities are installed. This feature will be enabled by > the kernel only if the AP facilities are installed on the linux > host. This feature must be turned on from userspace to access > AP devices from the KVM guest. The QEMU command line to turn > this feature looks something like this: > > qemu-system-s390x ... -cpu xxx,ap=on > > This feature will be supported for zEC12 and newer CPU models. > The feature will not be supported for older models due to > testability issues.
I think we (me, Halil and Pierre) agreed that this should not be a CPU_FEAT but instead some AP_INTERPRETATION toggle, that can be turned on/off dynamically. (CPU_FEAT cannot be changed after CPUs have been created). Can you discuss that with Halil + Pierre? -- Thanks, David / dhildenb
