[vfio-users] win7 report that the device cannot find enough free resources with a GPU behind a pci bridge

[Wuzongyong (Euler Dept)]

> > Hi,
> >
> > I found that win7/win2012r2 reported  "This device cannot find enough
> free resources that it can use"
> > with a NVIDIA GPU passthrough behind a PCI Bridge.
> > Here is a part of my xml:
> > <controller type='pci' index='1' model='pci-bridge'>
> >       <model name='pci-bridge'/>
> >       <target chassisNr='1'/>
> >       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> > function='0x0'/> </controller>
> >         <hostdev mode='subsystem' type='pci' managed='yes'>
> >           <driver name='vfio'/>
> >           <source>
> >             <address domainis='0x0000' bus='0x85' slot='0x0'
> function='0x0'/>
> >           </source>
> > <address type='pci' domain='0x0000' bus='0x01' slot='0x01'
> > function='0x0'/>
> >
> > There is a similar problem in
> > https://bugzilla.redhat.com/show_bug.cgi?id=1273172 but I still don't
> > know what Is the root cause
> 
> Neither do we.  Current status is doesn't work, don't do it.  Thanks,
> 
> Alex
So does this problem exist in all windows versions? It seems that there
is no problem with linux.

Thanks,
Wu Zongyong