On 26/09/2018 01:16, Tony Krowiak 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(+) > > diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c > index 81fd82f7626d..444965e78010 100644 > --- a/arch/s390/kvm/kvm-s390.c > +++ b/arch/s390/kvm/kvm-s390.c > @@ -371,6 +371,7 @@ static void kvm_s390_cpu_feat_init(void) > > if (MACHINE_HAS_ESOP) > allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); > + This unrelated change should be dropped. (can maybe be fixed when applying) Apart from that looks good! -- Thanks, David / dhildenb
