Re: [Qemu-devel] [PATCH] allocate pci id for mdpy

[Alex Williamson <alex.williamson@redhat.com>]

On Thu, 26 Apr 2018 18:40:40 +0300
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Thu, Apr 26, 2018 at 05:31:48PM +0200, Gerd Hoffmann wrote:
> > On Thu, Apr 26, 2018 at 06:10:48PM +0300, Michael S. Tsirkin wrote:  
> > > On Tue, Apr 24, 2018 at 08:38:57AM +0200, Gerd Hoffmann wrote:  
> > > > mdpy is a sample pci device for vfio-mdev.  Not (yet) merged upstream,
> > > > patch available here:
> > > > 
> > > > https://www.kraxel.org/cgit/linux/commit/?h=vfio-sample-display&id=6fd86cff3d7df38ab89625b16fdd6434b1c18749
> > > > 
> > > > Cc: Alex Williamson <alex.williamson@redhat.com>
> > > > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>  
> > > 
> > > Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> > > 
> > > I presume this should be merged together with the
> > > device implementation in qemu, or do you want this
> > > in tree sooner?  
> > 
> > There isn't a device implementation in qemu.  It's a mdev device
> > provided by the kernel.  Can be used with qemu using vfio. 
> 
> Why do we need a define in pci.h then?

Because we want to allocate the device ID rather than squat on an
unused one and risk that it later conflicts with an another device.  Do
we track device ID allocations from the RH vendor ID other than here in
QEMU?  Thanks,

Alex