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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>
This commit is contained in:
David Hildenbrand 2016-03-04 11:08:09 +01:00 committed by Christian Borntraeger
parent 4a5e7e381f
commit edc5b05566
1 changed files with 3 additions and 2 deletions
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5
arch/s390/kvm/priv.c
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@ -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 */