1d7db85b61
Let's use the KVM_SET_DEVICE_ATTR ioctl to enable hardware interpretation of AP instructions executed on the guest. If the S390_FEAT_AP feature is switched on for the guest, AP instructions must be interpreted by default; otherwise, they will be intercepted. This attribute setting may be overridden by a device. For example, a device may want to provide AP instructions to the guest (i.e., S390_FEAT_AP turned on), but it may want to emulate them. In this case, the AP instructions executed on the guest must be intercepted; so when the device is realized, it must disable interpretation. Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com> Tested-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20181010170309.12045-4-akrowiak@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com> |
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