Re: [Xen-users] GPL PV drivers

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Jan 07, 2010 at 05:15:28PM -0800, Brian Krusic wrote:
> Hi james.
> 
> Perhaps you can help me.
> 
> So I have pic pass through working for an Nvidia card which is my 2nd  
> graphics adapter.
> 
> I wish to dedicate it to a particular domU.
> 
> Besides adding the below line in my domU config file;
> 
> pci = ['07:00.0']
> 
> What else do I need to do before compiling Nvidia drivers (I found a  
> few write ups that tell you how to do this) in that domU?
> 

VGA/graphics pci passthrough is pretty much different from a 'normal'
PCI passthrough (NIC, disk controller/HBA, usb host, sound card).

VGA passthrough requires emulation of various legacy x86 memory ranges,
IO ports, and whatnot. It also requires re-execution of VGA adapter BIOS
in the guest.

Various people have gotten it working with xen-unstable (upcoming Xen 4.0) 
but I think all of them needed some custom modified patches.

Intel guys have been working on VGA passthrough stuff.
See xen-devel mailinglist archives about Xen VGA passthrough.

-- Pasi

> Incidentally, do you know how to make the above pci line work in the  
> new domU config syntax?
> 
> - Brian
> 
> On Jan 7, 2010, at 5:03 PM, James Harper wrote:
> 
> >>Hi,
> >>Is James Harper / GPL PV drivers
> >>borrowed some GPL code from the Linux kernel related to enumering  
> >>PCI devices
> >>on Windows or something like this?
> >>Can someone please clarify this. Thank you in advance.
> >
> >I'm not sure what the question is. I used the Linux PV stuff as  
> >inspiration for the GPLPV drivers and there is some direct cut &  
> >paste in there but Windows is sufficiently different to Linux that  
> >most of the work had to be done from scratch.
> >
> >Or maybe you asking about PCI passthrough?
> >
> >James
> >_______________________________________________
> >Xen-users mailing list
> >Xen-users@xxxxxxxxxxxxxxxxxxx
> >http://lists.xensource.com/xen-users
> 
> 
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