[v2,2/7] KVM: s390: add vector BCD enhancements facility to cpumodel
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Message ID 20190424115619.2483-3-borntraeger@de.ibm.com
State New
Headers show
  • KVM: s390: new guest facilities
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Commit Message

Christian Borntraeger April 24, 2019, 11:56 a.m. UTC
If vector support is enabled, the vector BCD enhancements facility
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>
 arch/s390/kvm/kvm-s390.c | 4 ++++
 1 file changed, 4 insertions(+)

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diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 03ddbe5e62bc..d3f3e63bb164 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -661,6 +661,10 @@  int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
 				set_kvm_facility(kvm->arch.model.fac_mask, 148);
 				set_kvm_facility(kvm->arch.model.fac_list, 148);
+			if (test_facility(152)) {
+				set_kvm_facility(kvm->arch.model.fac_mask, 152);
+				set_kvm_facility(kvm->arch.model.fac_list, 152);
+			}
 			r = 0;
 		} else
 			r = -EINVAL;