KVM: s390: add vector enhancements facility 2 to cpumodel

BugLink: https://bugs.launchpad.net/bugs/1836153
If vector support is enabled, the vector enhancements facility 2
might also be enabled.
We can directly forward this facility to the guest if available
and VX is requested by user space.

Please note that user space can and will have the final decision
on the facility bits for a guests.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
(cherry picked from commit 7832e91cd33f21f3cf82b003478c292915a1ec14)
Signed-off-by: Frank Heimes <frank.heimes@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 951cb26788062d66384499ece2301259664ebaca..8378668286f49c9b2861d4caa5095d372949f6a4 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -599,6 +599,10 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
                                set_kvm_facility(kvm->arch.model.fac_mask, 135);
                                set_kvm_facility(kvm->arch.model.fac_list, 135);
                        }
+                       if (test_facility(148)) {
+                               set_kvm_facility(kvm->arch.model.fac_mask, 148);
+                               set_kvm_facility(kvm->arch.model.fac_list, 148);
+                       }
                        r = 0;
                } else
                        r = -EINVAL;