[SRU][B][D][Patch 4/9] KVM: s390: add vector BCD enhancements facility to cpumodel

[frank.heimes at canonical.com]

From: Christian Borntraeger <borntraeger at de.ibm.com>

BugLink: https://bugs.launchpad.net/bugs/1836153

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 at de.ibm.com>
Reviewed-by: Janosch Frank <frankja at linux.ibm.com>
Reviewed-by: Collin Walling <walling at linux.ibm.com>
Reviewed-by: David Hildenbrand <david at redhat.com>
(cherry picked from commit d5cb6ab1e3d4d7e0648a167f6290e89f6e86964e)
Signed-off-by: Frank Heimes <frank.heimes at canonical.com>
---
 arch/s390/kvm/kvm-s390.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 8378668..009d763 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -603,6 +603,10 @@ static 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;
-- 
2.7.4