KVM: s390: vsie: support conditional-external-interception

We can easily enable cei for guest 2, so he can use it for guest 3.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
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 5ec598c..1c1188b 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -275,6 +275,8 @@
 		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
 	if (sclp.has_ib)
 		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
+	if (sclp.has_cei)
+		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
 }
 
 int kvm_arch_init(void *opaque)