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[SRU,B,D,3/9] KVM: s390: add vector enhancements facility 2 to cpumodel

Message ID 1563260079-14121-4-git-send-email-frank.heimes@canonical.com
State New
Headers show
Series zKVM: Add hardware CPU Model - kernel part (LP: 1836153) | expand

Commit Message

Frank Heimes July 16, 2019, 6:54 a.m. UTC 
From: Christian Borntraeger <borntraeger@de.ibm.com>

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>
---
 arch/s390/kvm/kvm-s390.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 951cb26..8378668 100644
--- 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;