Re: [Xen-users] vPro (VT-d) support?

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Would this VT-d let us assign graphic cards to DomUs?

You already can do this in principle (I'm not sure if it works in practice; a 
few people have tried playing with it though) for a PV domU.  With an IOMMU 
and some other moving parts (changes to Qemu device models, etc) it ought to 
be possible to do this for HVM domUs too.

Note my other e-mail about being able to pass through devices on systems 
without an IOMMU...  This could prove useful at some point in the future.

> Are we going to be 
> able to switch between Dom0 and DomU while this card is being used?
> We can talk some kind of "sharing" here, when DomU has the "screen", it
> uses the card, if not, Dom0. Or, somehow we should see the output of DomU
> in Dom0's screen, but with unmodified driver in the DomU.
>
> Possible? or not yet even with VT-d?

It'd need more coding in order to get the switching / sharing working.  VT-d 
could be one part of a solution make it safe and practical to pass graphics 
cards directly to HVM guests, but in itself it doesn't make switching 
on-the-fly possible.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users