KVM: s390: enable STFLE interpretation only if enabled for the guest

Not setting the facility list designation disables STFLE interpretation,
this is what we want if the guest was told to not have it.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index b54daed49c2c6c9a00d267ff9b40a8504a2e2fab..b6a065403bdc81dce7041db598e50bed1227eb3d 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1639,7 +1639,8 @@ static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
 
        vcpu->arch.cpu_id = model->cpu_id;
        vcpu->arch.sie_block->ibc = model->ibc;
-       vcpu->arch.sie_block->fac = (int) (long) model->fac->list;
+       if (test_kvm_facility(vcpu->kvm, 7))
+               vcpu->arch.sie_block->fac = (int) (long) model->fac->list;
 }
 
 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)