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

[Pasi Kärkkäinen <pasik@xxxxxx>]

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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