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Commit 2f87d942 authored by Guenther Hutzl's avatar Guenther Hutzl Committed by Christian Borntraeger
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KVM: s390: Introduce BCD Vector Instructions to the guest 



We can directly forward the vector BCD instructions to the guest
if available and VX is requested by user space.

Please note that user space will have to take care of the final state
of the facility bit when migrating to older machines.

Signed-off-by: default avatarGuenther Hutzl <hutzl@linux.vnet.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 53743aa7

arch/s390/kvm/kvm-s390.c

+4 −0
Original line number Diff line number Diff line
@@ -505,6 +505,10 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) 
		} else if (MACHINE_HAS_VX) {

			set_kvm_facility(kvm->arch.model.fac_mask, 129);

			set_kvm_facility(kvm->arch.model.fac_list, 129);

			if (test_facility(134)) {

				set_kvm_facility(kvm->arch.model.fac_mask, 134);

				set_kvm_facility(kvm->arch.model.fac_list, 134);

			}

			if (test_facility(135)) {

				set_kvm_facility(kvm->arch.model.fac_mask, 135);

				set_kvm_facility(kvm->arch.model.fac_list, 135);