Re: [Xen-devel] GPU passthrough

[Alex Merritt <merritt.alex@xxxxxxxxx>]

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On Mon, Aug 15, 2011 at 11:14, Greg Shieh <greg.shieh@xxxxxxxxx> wrote:
> Hi Alex,
>
> I am using GPU for graphic demo purpose.
>
> My kernel is 2.6.32.12, I am running Suse 11.3. I only can run PV since
> there is no HVM option for me when creating VM.

Hm, I've only noticed the opposite, where a Linux distribution does
not ship with a kernel that is paravirtualized, forcing me to choose a
guest configured as an HVM.

>
> What Kernel are you using? Can you send me some info what what you did to
> make your GPU can passthrough to a VM?

I used 2.6.32.40 from the pvops tree for Domain-0 and Xen 4.1. The VM
was configured as HVM using libvirt's XML configuration specification.
My system has an Intel Tylersburg chipset in it, providing an IOMMU
implementation (VT-d). After creating the guest, I added a section in
the XML file specifying which device to pass through, then wrote to a
/sys file to enable passthrough of GPUs at runtime:

http://wiki.xensource.com/xenwiki/VTdHowTo

I believe I used "virt-install" to configure and create a guest VM,
via the GUI that is provided.

>
> Thanks.
>
> Greg
>
>
>
> On Sun, Aug 14, 2011 at 4:34 PM, Alex Merritt <merritt.alex@xxxxxxxxx>
> wrote:
>>
>> Hi Greg,
>>
>> What are you intending to use the GPU for? Graphics or non-graphical
>> computations?
>>
>> I was able to pass a GPU through to an HVM guest (not
>> para-virtualized). I have not tested graphics, but was able to
>> successfully run CUDA programs.
>>
>> -Alex
>>
>> On Fri, Aug 12, 2011 at 20:36, Greg Shieh <greg.shieh@xxxxxxxxx> wrote:
>> >
>> > I have a server with a GPU sitting on PCI-E slot. I am running Suse with
>> > Xen. I have created a VM and want that VM can use GPU on the server with
>> > passthrough technique.
>> >
>> > Any code that I can use?
>> >
>> >
>> >
>> > On Fri, Aug 12, 2011 at 4:11 PM, Pasi KÃrkkÃinen <pasik@xxxxxx> wrote:
>> >>
>> >> On Fri, Aug 12, 2011 at 03:39:37PM -0700, Greg Shieh wrote:
>> >> > Â ÂI am new to Xen.
>> >> >
>> >>
>> >> Hello,
>> >>
>> >> > Â ÂIs there a code somewhere that implemented GPU passthrough on
>> >> > Linux ?
>> >> > Â ÂI looked Xen wiki and could not find it.
>> >> >
>> >>
>> >> What do you exactly mean? If you run Linux in Xen HVM guest you can
>> >> passthru GPU to Linux..
>> >>
>> >> http://wiki.xen.org/xenwiki/XenVGAPassthrough
>> >>
>> >> -- Pasi
>> >>
>> >
>> >
>> > _______________________________________________
>> > Xen-devel mailing list
>> > Xen-devel@xxxxxxxxxxxxxxxxxxx
>> > http://lists.xensource.com/xen-devel
>> >
>> >
>
>

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