Re: [PATCH v4] introduce vfio-user protocol specification

[John G Johnson]

> On Sep 29, 2020, at 3:37 AM, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> 
> On Mon, Sep 28, 2020 at 09:58:37AM +0000, Thanos Makatos wrote:
>>> It should be accompanied by a test in tests/. PCI-level testing APIS for
>>> BARs, configuration space, interrupts, etc are available in
>>> tests/qtest/libqos/pci.h. The test case needs to include a vfio-user
>>> device backend interact with QEMU's vfio-user-pci implementation.
>> 
>> We plan to use a libmuser-based backend for testing. This, I suppose, will
>> make libmuser a dependency of QEMU (either as a submodule or as a library),
>> which for now can be disabled in the default configuration. Is this 
>> acceptable?
> 
> If there are no other dependencies and libmuser supports all host
> operating systems that QEMU's -device vfio-user supports, then I think
> it's a good idea to use libmuser for at least one in-tree test in QEMU.
> 
>>> Also please let us know who is working on what so additional people can
>>> get involved in areas that need work!
>> 
>> Swapnil and I will be working on libmuser and the test in QEMU, John and
>> the mp-qemu folks will be working on the patches for implementing
>> --device vfio-user-pci.
> 
> Great!
> 
> John: Will mpqemu use libmuser to implement the remote PCI host
> controller?
> 


        The vfio-user-pci plan is to use libmuser on the server side.

                                                                JJ