Re: [Xen-users] Nvidia: card fails to work in EITHER dom0 or domU -- any advice?

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Sep 06, 2012 at 06:11:57PM +0300, Pasi Kärkkäinen wrote:
> On Thu, Aug 30, 2012 at 03:37:23PM -0700, Brian Johnson wrote:
> >    Hi all,
> >    I have a Nvidia GeForce GTX 680 that I'd like to use in a Xen
> >    configuration.  I don't care if it's used by dom0 or by a linux domU
> >    guest, either would be OK for my purposes.  Since getting this card, I've
> >    experimented with Linux 3.4.6 and Xen 4.1.2 and determined the following:
> >    1. The card works correctly under a linux kernel without Xen running.
> >    2. The Nvidia proprietary drivers do not function in a dom0 setting,
> >    because PAT is disabled in the dom0 kernel.  The driver detects this and
> >    refuses to run.
> >
> 
> Hmmm.. maybe Konrad (cc) can tell more about the PAT stuff. 

You could revert one patch and insert two other ones that make PAT work.

Look at
http://lists.xen.org/archives/html/xen-devel/2012-05/msg02277.html

ah, but the resolution never got copied.

If you can revert 8eaffa67b43e99ae581622c5133e20b0f48bcef1
and merge git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git 
stable/for-x86


Or here:
https://groups.google.com/forum/?fromgroups=#!topic/qubes-devel/MyVtKaKfqIM

> 
> >    3. Using PCI passthrough to a domU linux VM does not work either -- the
> >    Nvidia proprietary driver does not recognize the card in the guest.  Not
> >    sure why, but I suspect some resource the card uses is not being passed
> >    through correctly.  (I can pass an AMD card to a domU without problems.)
> >    I know that the Nvidia proprietary driver doesn't officially support Xen,
> >    so getting it to work in dom0 might be futile, even if the PAT issue is
> >    resolved.  So my main hope is to get passthrough to a guest working
> >    correctly.  Any suggestions?  Is Xen 4.2 more likely to work for my use
> >    case?
> >
> 
> You probably need the Nvidia vga passthru patches for Xen. 
> Those patches are not yet merged to Xen, so they're out-of-tree.
> 
> 
> >    (The nouveau driver is not an option for me because I require OpenGL 3.2+
> >    features, and last I checked, it doesn't support the GTX 680 anyway.)
> >    Brian
> 
> -- Pasi

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users