From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Borntraeger Subject: [GIT PULL 06/12] KVM: s390: Introduce Vector Enhancements facility 1 to the guest Date: Wed, 1 Feb 2017 12:38:08 +0100 Message-ID: <1485949094-138708-7-git-send-email-borntraeger@de.ibm.com> References: <1485949094-138708-1-git-send-email-borntraeger@de.ibm.com> Return-path: In-Reply-To: <1485949094-138708-1-git-send-email-borntraeger@de.ibm.com> Sender: kvm-owner@vger.kernel.org List-Archive: List-Post: To: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Cc: KVM , Christian Borntraeger , Cornelia Huck , Jens Freimann , linux-s390 , Maxim Samoylov List-ID: From: Maxim Samoylov We can directly forward the vector enhancement facility 1 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. Reviewed-by: David Hildenbrand Signed-off-by: Maxim Samoylov Signed-off-by: Christian Borntraeger --- 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 4f74511..1fd4b85 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -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(135)) { + set_kvm_facility(kvm->arch.model.fac_mask, 135); + set_kvm_facility(kvm->arch.model.fac_list, 135); + } r = 0; } else r = -EINVAL; -- 2.7.4