Re: PCI Passthrough and graphic cards ...

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On Wed, Nov 4, 2009 at 11:00, Asdo <asdo@xxxxxxxxxxxxx> wrote:
> In case of a single video card in the system, it would be wonderful to be
> able to suddenly give the video card as passthrough to the guest removing it
> from the host. Since the video card internal state is unknown to the guest,
> the guest should then re-initialize it with some help of a guest driver. For
> example it could act like resuming the graphics from standby.
> Giving the video card back to the host would need some kind of a hotkey.
> While the video card is at the host, the guest graphics would be invisible
> (not windowed). Alternatively the guest could be frozen.
>
> Would that be anyhow feasible?
>
> That would be just great for the people who use Windows for videogames
>
> Thank you
> Asdo

I'm currently working in this as a research project at university.
I'll have more information soon. But basically, the problem is that
graphic cards have BIOS. In order to make this work, graphic card must
be reseted, just like it happens whenever a computer is powered up.

I'm currently porting xen patch into kvm.

If someone has more information, please, let me know.

Thanks
Federico

>
> Han, Weidong wrote:
>>
>> Passthrough graphic card to guest can satisfy your requirement. Currently
>> it's not supported in kvm, but we have a plan to support it, but you still
>> need wait for a while.
>>
>> I think sharing the host graphics power is not easy to implement.
>>
>> Regards,
>> Weidong
>
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