Re: [Qemu-devel] [PATCH 3/4] pci: add default pci subsystem id for all devices.

[Anthony Liguori]

Gerd Hoffmann wrote:
> Anthony Liguori wrote:
>   
> > > TODO: get an official vendor ID assigned, or borrow one (maybe
> > >       Qumranet which already sponsors the virtio IDs ???).
> > >       
> > Does the subvendor ID have to be an official vendor ID?
> >     
>
> I think so, as far I know there is no difference between vendor and
> subvendor ID in that respect.
>
>   
> > I thought that
> > the subvendor ID could be defined by the vendor as whatever it wants..
> >     
>
> Each vendor can assign the device (and subdevice) IDs freely.
>   

It's worth looking into because in virtio, we currently define the 
subvendor ID to be not the PCI vendor ID space.  I'll try to dig up a 
copy of the PCI spec and confirm.  If it's not required to be the PCI 
vendor ID space, then this patch is unnecessary.  We can just set it to 
a non-0 value of our choosing.

Regards,

Anthony Liguori

> cheers,
>   Gerd
>
>
>