KVM: s390: provide a capability for AIS state migration
The AIS capability was introduced in 4.12, while the interface to migrate the state was added in 4.13. Unfortunately it is not possible for userspace to detect the migration capability without creating a flic kvm device. As in QEMU the cpu model detection runs on the "none" machine this will result in cpu model issues regarding the "ais" capability. To get the "ais" capability properly let's add a new KVM capability that tells userspace that AIS states can be migrated. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NCornelia Huck <cohuck@redhat.com> Reviewed-by: NDavid Hildenbrand <david@redhat.com> Acked-by: NHalil Pasic <pasic@linux.vnet.ibm.com>
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