Re: [Xen-devel] AMD GPU passthrough in Xen

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Monday, September 22, 2014, 2:16:58 PM, you wrote:

> Hi Kelly, list

> I see you're having AMD GPU success with Xen 4 2 and Linux 3.4.9. I've been 
> less than successful getting passthrough working at all in Xen (although it's 
> fine in KVM primary passthrough as long as the BIOS is supplied as a file). 
> Could I confirm the following :

> Is there any specific reason you're using Xen 4.2 rather than 4.4.1? I know 
> in some ways 4.4 suffers as it's now xl only and some of the xm functionality 
> has not come across.

> In 4.2, using xl or xm?

Another interesting question/aspect would be qemu-traditional (with rombios) or 
"upstream" (with seabios) ? 

> Primary or secondary passthrough?

> Presumably 64 bit versions of Windows?

> My system is a bit old (Core2Quad) but as mentioned AMD passthrough works in 
> KVM but I've found it tricky in Xen.

> I am quite willing to test various scenarios. I've a 6950, 6450 and 5450.

> Thanks

> Peter




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