KVM: s390: enable PFMFI only if available

Let's enable interpretation of PFMFI only if the facility is
actually available. Emulation code still works in case the guest is
offered EDAT-1.

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>

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 1a239a6748fe2fb766630b9ecf1f532ddc956b14..d987eb8af05916b684add6d84a725ba02b40e336 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1843,7 +1843,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
        if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73))
                vcpu->arch.sie_block->ecb |= 0x10;
 
-       if (test_kvm_facility(vcpu->kvm, 8))
+       if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
                vcpu->arch.sie_block->ecb2 |= 0x08;
        vcpu->arch.sie_block->eca = 0x1002000U;
        if (sclp.has_cei)