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

Congrats to all that got it working!  

For a while, I thought it must have been a miracle or some other divine 
intervention as it was taking me so long.  Glad to see others making progress, 
though I must say I am surprised that Xen, Intel, etc. have not made this 
easier since I worked on this last over 2 years ago.

For the rest, hang in there and keep at it!  You will get it!


-----Original Message-----
From: Anish Patel [mailto:anish.mailing.list@xxxxxxxxx] 
Sent: Thursday, February 03, 2011 1:07 PM
To: Pasi Kärkkäinen
Cc: Peter van der Maas; xen-users@xxxxxxxxxxxxxxxxxxx; 
Subject: Re: Nvidia 9500GT Xen VGA passthru

Hi All,
     I will post the full patch set soon there are still a couple of 
bugs i need to work out.

System -
Phenom x6 2.8
16 gig DDR3
BIOSTAR 890FX board with latest bios.
Dom 0 config
     4 cores, ATI 5450 with open source drivers.

Dom U
  WinXP HVM, 5770 passed through to Dom, 2 cores, 2 gigs memory.

Please give me a couple days and i will post a full write up

I can probably get this to work with the nvidia card as well, but need 
to figure out the pBAR/vBAR stuffs.


On 02/01/11 14:55, Pasi Kärkkäinen wrote:
> 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@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- (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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