On Tue, 25 Sep 2018 19:16:40 -0400 Tony Krowiak <akrowiak@xxxxxxxxxxxxxxxxxx> wrote: > From: Tony Krowiak <akrowiak@xxxxxxxxxxxxx> > > Introduces two new CPU model facilities to support > AP virtualization for KVM guests: > > 1. AP Query Configuration Information (QCI) facility is installed. > > This is indicated by setting facilities bit 12 for > the guest. The kernel will not enable this facility > for the guest if it is not set on the host. > > If this facility is not set for the KVM guest, then only > APQNs with an APQI less than 16 will be used by a Linux > guest regardless of the matrix configuration for the virtual > machine. This is a limitation of the Linux AP bus. > > 2. AP Facilities Test facility (APFT) is installed. > > This is indicated by setting facilities bit 15 for > the guest. The kernel will not enable this facility for > the guest if it is not set on the host. > > If this facility is not set for the KVM guest, then no > AP devices will be available to the guest regardless of > the guest's matrix configuration for the virtual > machine. This is a limitation of the Linux AP bus. > > Signed-off-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx> > Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> > Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx> > Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> > Tested-by: Michael Mueller <mimu@xxxxxxxxxxxxx> > Tested-by: Farhan Ali <alifm@xxxxxxxxxxxxx> > --- > arch/s390/kvm/kvm-s390.c | 1 + > arch/s390/tools/gen_facilities.c | 2 ++ > 2 files changed, 3 insertions(+) With the trivial change Acked-by: Cornelia Huck <cohuck@xxxxxxxxxx>
