KVM: s390: support NQ only if the facility is enabled for the guest

While we can not fully fence of the Nonquiescing Key-Setting facility,
we should as try our best to hide it.

Reviewed-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>

arch/s390/kvm/priv.c

@@ -670,8 +670,9 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
 	if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 
-	/* Only provide non-quiescing support if the host supports it */
-	if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
+	/* Only provide non-quiescing support if enabled for the guest */
+	if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
+	    !test_kvm_facility(vcpu->kvm, 14))
 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 
 	/* No support for conditional-SSKE */