[libvirt] [PATCH 0/8] vfio-ccw passthrough support

[John Ferlan]

[...]

>> Someone may also want to consider creating a s390 specific version of
>> what Peter did for x86_64 for VIR_TEST_CAPS_LATEST in order to then
>> have/use the "latest" capabilities instead of adding bits to xml2argv
>> tests. I'm curious why the xml2xml test needed the bit adjustment - did
>> something fail?  Since there were no xml output data changes, that would
>> seem to indicate there isn't a need to modify the xml2xml test source.
> I am not sure if I understood you correctly. Are you referring to patch
> 1? If so the changes are caused by a new QEMU_CAPS_CCW capability
> replacing the QEMU_CAPS_VIRTIO_CCW capability. More is explained in the
> commit message of the patch. In short: With support of vfio-ccw it
> became apparent that the existence of the ccw bus is not well sourced by
> observing virtio-ccw and therefore we replaced it with the detection of
> the virtual-css-bridge. Let me know if I understood you wrong.
> 

Sorry it wasn't clear enough - changes were recently made to
tests/qemuxml2argvtest.c in order to run the tests using the latest
capabilities rather than needing to pass each capability through the
test. The macros also have a version specific macro which allows for
checking/output from "previous" QEMU releases.

However, the changes only modified macros for x86_64 - so my comment was
if someone felt so inclined to avoid needing/checking specific/certain
caps and only cared that the latest caps did something a certain way,
then adjusting those macros/tests to handle s390* specific things would
perhaps helps achieve that. Furthermore, if previous QEMU versions would
produce different results, then using the version specific checks/output
would provide that support.

John