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

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

Hi All,
    I have managed to get the 2nd vga passed though.  I had to use 
AMD/ATI card to get this done.

Thanks
Anish

On 01/31/11 14:26, Pasi Kärkkäinen wrote:
> On Mon, Jan 31, 2011 at 11:39:51AM -0500, Anish Patel wrote:
> > 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?
> I think gfx_passthru can only use 0 or 1 nowadays.
>
> Patches probably need to be forward-ported to current Xen..
> most of them are for xen-unstable from the Xen 3.5 days..
>
> -- Pasi
>
> > 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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