Commit 2f87d942 authored Jun 03, 2016 by Guenther Hutzl Committed by Christian Borntraeger Jan 30, 2017

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: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian 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);

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