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

[Alex Williamson]

On Thu, 10 May 2018 01:36:36 +0000
"Wuzongyong (Euler Dept)" <cordius.wu at huawei.com> wrote:

> > > 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.

Nope, only Windows 7 AFAIK.  Thanks,

Alex