[dpdk-dev] [PATCH 0/9] Introduce vfio-user library

[Thanos Makatos]

> Hello,
> 
> On Fri, Dec 18, 2020 at 8:54 AM Chenbo Xia <chenbo.xia at intel.com> wrote:
> > *librte_vfio_user* library is an implementation of VFIO-over-socket[1]
> (also
> > known as vfio-user) which is a protocol that allows a device to be virtualized
> > in a separate process outside of QEMU.
> 
> What is the status of the specification on QEMU side?
> Integrating an implementation in DPDK is premature until we have an
> agreed specification.

We're in the process of reviewing the specification, the latest version (v7) is here: https://www.mail-archive.com/qemu-devel@nongnu.org/msg763207.html. We haven't had any reviews yet for that revision, IMO we're getting close.

FYI John Johnson is implementing the relevant changes in multiprocess QEMU. John Levon, Swapnil, and I are implementing the server part in libvfio-user (formerly known as MUSER). We also have a mailing list now: https://lists.nongnu.org/mailman/listinfo/libvfio-user-devel. We've been working on integrating the two parts.

Finally, Changpeng is implementing an NVMe controller in SPDK. We're trying to make it work with multiprocess QEMU and libvfio-user, we're very close.