Re: Nvidia 9500GT Xen VGA passthru

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Tue, Feb 01, 2011 at 02:26:33PM -0500, Anish Patel wrote:
> Hi All,
>     I have managed to get the 2nd vga passed though.  I had to use  
> AMD/ATI card to get this done.
>

Nice!

Please post the details:

- VGA card model
- Xen version
- Dom0 kernel version
- DomU OS/version/kernel
- Any custom/additional patches used


-- Pasi

>
> 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@iki.fi]
>>>>> Sent: Saturday, January 29, 2011 2:04 PM
>>>>> To: Peter van der Maas
>>>>> Cc: xen-users@lists.xensource.com; anish.mailing.list@gmail.com; xen-devel@lists.xensource.com
>>>>> 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
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>>>>>> http://lists.xensource.com/xen-users
>