[Spice-devel] Windows 10 guest: 2D/3D Accel

[Oscar Segarra]

Ok, thanks for the detailed explanation... I'd suggest to publish it in
your webpage in order to help other users.

Óscar.

2017-05-09 13:24 GMT+02:00 Frediano Ziglio <fziglio at redhat.com>:

> There's a bit of confusion.
>
> The VM sees which cards the hypervisor (Qemu in this case) is configured
> to provide. As
> any card GPUs can be
> 1) physical, fully virtual
> 2) paravirtual
> 3) pass-through, specifically:
> 3.1) full pass-through
> 3.2) function pass-through
>
> 1) like VGA, a physical card is fully emulated, quite slow, there are
> some cards which are better than others as requires less guest <->
> hypervisor
> switches;
> 2) there are no physical card, the card is created just for virtual
> environment.
> This reduce the switches guest <-> hypervisor and optimized a lot of
> functions.
> Virgl cards, like QXL or VirtIO cards are like that. Are much more
> efficient
> and allows lot of features provided by virtual environment (like suspend
> or migration). The "best" for Qemu and 3d is surely Virgl but as said
> there's
> no Windows drivers at the moment;
> 3) you pass a full physical card or part of it. This CAN'T be used by the
> host
> and reduce control not allowing (usually) suspend and migration;
> 3.1) basically an entire physical card is passed to the guest. If you have
> an additional
> GPU (graphical card) you can do it;
> 3.2) some cards allow to provide part of its functions to be assigned like
> if were a physical card. For GPU currently Qemu/KVM does not provide
> much. Work is going to support Intel solutions and Nvidia ones.
> Nvidia ones are usually quite expensive (cards do not fit in either laptops
> or even desktops) while Intel offers some really cheap solutions using a
> mix of hardware/software solution.
>
> Frediano
>
>
> Hi Christophe,
>
> Thanks a lot for your clarifications... can you help me with the other
> questions?
>
> *Is there any way to check if is it using client GPU or host CPU?*
>
> *Is there any Grpahics card to be plugged in the host in order to use host
> GPU?*
>
> thanks a lot.
>
>
> 2017-05-09 12:03 GMT+02:00 Christophe Fergeau <cfergeau at redhat.com>:
>
>> Hey,
>>
>> On Tue, May 09, 2017 at 10:42:31AM +0200, Oscar Segarra wrote:
>> > Hi,
>> >
>> > What kind of drivers are required in windows? (I supose you mean Windows
>> > guest).
>>
>> A video driver able to use virtio-gpu + virgl would be needed, but does
>> not exist at the moment. This is one of the Google Summer of Code
>> projects for this year though.
>>
>> Christophe
>>
>
>
>
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