Re: [Xen-users] VGA Passthrough of AMD FirePro W7000 to Windows 8: Not enough resources

[Toby Miller <tobycmiller@xxxxxxxxx>]

>> gordan@xxxxxxxxxx wrote:
>   On Sun, 29 Sep 2013 15:01:01 +0100, Toby Miller<tobycmiller@xxxxxxxxx>  
>   wrote:
> > >I'm using Xen 4.3, installed from source on Ubuntu 13.04. I've
> > >successfully installed a Windows 8 guest, and had Xen pass it an AMD
> > >FirePro W7000 GPU (technically 2 PCI devices - the second is for the
> > >sound), as well as the virtualised graphics adapter. Windows finds
> > >the
> > >card fine, and I've installed AMD's drivers. Device Manager says that
> > >the card cannot find enough resources (code 12). I've checked the IO,
> > >IRQ, and Memory details in DM, and there don't seem to be any
> > >clashes.
> > >
> > >I did try disabling the virtualised card from Windows, but it seemed
> > >to keep using it anyway, even after a restart. It didn't make any
> > >difference to the FirePro in any case.
> > >
> > >I'd be grateful for some help.
>   I haven't tried Windows 8, but on XP64 disabling the Cirrus card in
>   device manager fixed the problem for me with Nvidia card passthrough.
>
>   You could try setting gfx_passthru=1, which should disable the
>   Cirrus emulation alltogether. That may make Windows domU completely
>   fail to boot, though.
>
>   Did you do a clean Win8 install and reboot the host fully? Is the
>   FirePro the primary GPU on the host? Or is it completely untouched
>   in dom0 (no dom0 or BIOS output on it)?
>
>   Gordan
Thanks for your reply. It turns out the problem was that I'd forgotten 
to put device_model_version="qemu-xen-traditional", so I was using a 
qemu that didn't support gfx_passthrough. The FirePro is not used in 
dom0 at all. I'm using pciback to hide it.
I now have another problem though. The Ubuntu host crashes a lot when 
the Windows 8 guest is running. Mostly it happens when I try to shut 
down Windows - I think it might be a result of the FirePro card being 
released -, but sometimes it happens randomly too. The screen completely 
freezes, and no ssh or anything. I should mention that I'm not passing 
through the audio pci device for the FirePro, although it is bound to 
pciback so the host can't be using it either. If I try to pass that 
through it never actually boots. I've had a lot of blue screens, and a 
lot of host crashes. I'm passing through a USB device too (i.e. the PCI 
USB device), and that works fine.
Googling doesn't seem to come up with much for host crashes. What can I 
do to diagnose the problem? There's nothing in the syslog.
Thanks a lot!

Toby

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