Re: [Qemu-devel] [PATCH for-3.2 01/11] vhost-user: define conventions for vhost-user backends

[Marc-André Lureau]

Hi

On Mon, Dec 10, 2018 at 6:30 PM Gerd Hoffmann <address@hidden> wrote:
>
> On Mon, Nov 26, 2018 at 04:42:40PM +0400, Marc-André Lureau wrote:
> > As discussed during "[PATCH v4 00/29] vhost-user for input & GPU"
> > review, let's define a common set of backend conventions to help with
> > management layer implementation, and interoperability.
> >
> > Signed-off-by: Marc-André Lureau <address@hidden>
> > Reviewed-by: Daniel P. Berrangé <address@hidden>
>
> Acked-by: Gerd Hoffmann <address@hidden>
>
> btw: have you seen the idea to use a vfio-style interface for
> communication between qemu and external device emulation processes?

I heard there was some discussion during KVM forum.

Fwiwi, this is also an idea I proposed last year (and quickly
discussed during my talk about multi-process qemu).
I also experimented with the idea, and wrote a vfio-user backend, with
a PCI serial device running in a seperate process:
the qemu tree: https://github.com/elmarco/qemu/tree/wip/vfio-user (dirty tree)
and the serial device:
https://github.com/elmarco/qemu/blob/wip/vfio-user/contrib/libvfio-user/vfio-user-serial.c



>
> cheers,
>   Gerd
>