[Xen-devel] Re: Nvidia 9500GT Xen VGA passthru

[Anish Patel <anish.mailing.list@xxxxxxxxx>]

I have this almost working now,   I think the only thing that i need to 
change is to add a gfx_passthru=2 option to let xen know not to read 
from /dev/mem then an option to tell it what VGA rom to use.   Are there 
any patches for 4.01 for this?

Thanks
Anish
On 01/31/11 06:50, Pasi Kärkkäinen wrote:
> On Sun, Jan 30, 2011 at 12:42:56AM -0500, Peter van der Maas wrote:
> > I really have not played with too much after the proof of concept.  I do recall 
> > something eventually breaking the config, perhaps a Xen update.  I've since put 
> > the hardware to better use, although I am still intrigued by Xen.  At the time, 
> > I was working with a team that was giving serious consideration to virtualizing 
> > their platform, and what better way to learn than dig in and get my hands dirty.
> >
> > I tried to include as much detail at the time, with the plethora of different 
> > Xen builds, BIOS's updates, etc.
> >
> > If someone has something specific I can try to help, but doubtful I will be of 
> > any use.  For example, I did not realize Xen 4.x was even released.  Recent 
> > projects I've been working on do not lend themselves well to virtualization; 
> > however, I might have to give Xen 4.0 shot - just to play, of course.  There 
> > were some serious changes happening with Xen, the Linux kernel, and KVM when I 
> > stopped playing.
> Ok.
>
> I mainly meant if you remember what custom patches did you have to use/create?
> Most probably you had to do some vBar=pBar hacking, right?
>
> I guess I'll have to try this myself one day and document the process
> with current Xen versions..
>
> -- Pasi
>
>
> > Sorry I could not be of more help.
> >
> > Peter van der Maas
> > peter&pjv-c.com
> >
> > -----Original Message-----
> > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > Sent: Saturday, January 29, 2011 2:04 PM
> > To: Peter van der Maas
> > Cc: xen-users@xxxxxxxxxxxxxxxxxxx; anish.mailing.list@xxxxxxxxx; 
> > xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: Nvidia 9500GT Xen VGA passthru
> >
> >
> > Hello Peter,
> >
> > Some people have been asking for tips about Nvidia Xen VGA passthru,
> > so maybe you could help?
> >
> > Could you post the exact steps you did?
> >
> > Have you tried with Xen 4.0.x after your initial experiments in 2009?
> >
> > Thanks!
> >
> > -- Pasi
> >
> > On Mon, Jan 26, 2009 at 02:16:32PM -0500, Peter J. van der Maas wrote:
> > >     I am happy to announce that I have successfully (and finally!) been able
> > >     to pass a PCIe graphics card via VT-d to a Windows XP HVM DomU.
> > >
> > >
> > >
> > >     About time!
> > >
> > >
> > >
> > >     Config:
> > >
> > >     -Intel Q6600 Core 2 Quad-Core, G0 stepping (I think)
> > >
> > >     -Intel DQ35JO Motherboard, Q35 Chipset, BIOS v.991 (1/9/09), VT and VT-d
> > >     enabled
> > >
> > >     -nVidia 9500GT (for VT-d passthrough - DomU)
> > >
> > >     -nVidia GeForce2 MX200 (Dom0 console)
> > >
> > >     -Xen (build: xen-unstable, recent as of ~ 1/25/09 1:00AM-EST)
> > >
> > >     -Dom0: Linux-2.6.18.8-xen (via xen-unstable.hg)
> > >
> > >     -DomU: Windows XP (pro, sp3, 32-bit)
> > >
> > >
> > >
> > >     Once the VT-d bugs were recently corrected (thank you, xen-devel!),
> > >     everything went fairly smoothly.  Still very buggy yet (its
> > >     xen-unstable!), but overall it works.
> > >
> > >
> > >
> > >     Make sure support for the PCI-backend is compiled into the kernel (not
> > >     just a module) and that you have your pciback.hide options in grub
> > >     (late-binding may work, but I haven't tried).
> > >
> > >
> > >
> > >     Good luck!
> > >
> > >
> > >
> > >
> > >
> > >     -Peter van der Maas
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users

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