On Fri, 15 Mar 2019 15:10:25 +0100 Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote: > Sorry, wrong conclusion, handling this in userland will bring us much > too far if we want to answer correctly for the case the hook is not > there but QEMU accepted the facility for AQIC. > > The alternative is easier, we just continue to respond with the > OPERATION exception here and only handle the specification and > privileged exception cases in QEMU and in the hook. I don't quite understand what do you mean by this paragraph. Especially not what do you mean by 'just continue to respond with the OPERATION exception here'. In any case if the guest is supposed to have ap instructions, and does not have facility 65 the right answer is specification and not operation exception. And this has to work regardless of vfio-ap module loaded or not. Regards, Halil > > So, I think the discussion will go on until you come back :) > > Regards, > Pierre
