Re: [Xen-users] Xen 4.2 Windows 8 Issues

[David Sutton <kantras@xxxxxxxxx>]

John,

On Wed, Oct 23, 2013 at 2:55 PM, John Wargo <wargo.john25@xxxxxxxxx> wrote:

I was browsing the wiki earlier today, and I found this : http://old-list-archives.xenproject.org/archives/html/xen-devel/2010-10/txtfLpL6CdMGC.txt
It's a source-code patch for xen. How do I apply it?
Also, I'm thinking about building Xen-4.3.0-RC6 from source, is there a reason why I shouldn't try to see if a fix has been implemented there?

Thanks,
-John

That particular patch is still used today by some people, when working with passing an AMD card through to a guest domU. Theres a copy of it included with the ArchLinux xen aur packages, cleaned up so it will apply cleanly to xen v4.3.0. Its not been accepted into the source code at this time. To install it, typically you'd grab a copy of the xen source code, download the patch file, then use the 'patch' command to update the source code with the patches changes.

Passthrough of AMD graphics cards can be a little problematic at times; often people have great access the first time the domain is started, but restarts of the domain cause the card to lock up and often require the host system to be rebooted to reset the graphics card. I have a system where I've been passing through a 7750 to a Windows 7 guest, and it experiences issues if I have to restart the guest for any reason (until I reboot the host). It appears partly to be related to driver issues and getting the card to reset properly. I've also been using a modified Nvidia GTX 670 (reports back as a Grid K2, but have Physx working) and its been much more stable (the Grid K2 drivers are better designed for a virtualized environment)

Regards,

  David

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