Re: Hacking QEMU/KVM to use unused graphics adapters

[Dor Laor <dor.laor-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Wed, 2008-01-16 at 13:05 +0100, Anthony de Almeida Lopes wrote:
> I just read the ChangeLogs from kvm-47 to kvm-59 but I didn't notice 
> anything that about PCI pass-through or any VGA work. I'm curious how 
> things are going and what method was selected to accomplish this 
> functionality?
>  - Tony
> 

First we had plans only for plain PCI pass through and not VGA device
that has some bios unification possible issues.
Second, we have it working (also all the code was sent to the list) but
there's quick an effort to be done in order to merge it into mainline.
We do want it to happen but we have some other issues on our plait.
Nevertheless, if one wants to push it on
we'll be happy to assist.
Regards,
Dor

> Dor Laor wrote:
> > It's still out-of -tree.
> > Not for long :)
> >
> > Anthony de Almeida Lopes wrote:
> >> Muli Ben-Yehuda wrote:
> >>  
> >>> On Thu, Oct 11, 2007 at 10:40:47AM +0200, Laurent Vivier wrote:
> >>>
> >>>      
> >>>>> There is work in progress for pci pass through capability. Besides
> >>>>> PCI it also required to have pv dma or 1-1 mapping between the
> >>>>> guest and the host.  Both will be released in the following
> >>>>> month. NIC pass through works but I'm not sure about the features
> >>>>> required from VGA pass through.  Dor.
> >>>>>               
> >>>> Perhaps if we use host IOMMU we don't need pv DMA ?
> >>>>           
> >>> Indeed, an IOMMU can provide the 1-1 mapping Dor mentioned above (or
> >>> you can have both PV DMA and an IOMMU).
> >>>
> >>>      
> >>>> How do you say to host to not manage a PCI devices and let the guest
> >>>> managing it ?
> >>>>           
> >>> If the host driver is modular, it might be enough to just not load (or
> >>> unload) it.
> >>>
> >>> Cheers,
> >>> Muli
> >>>       
> >>
> >> Thank you for your responses. I was curious, Dor, where could I take 
> >> a look at this code?
> >> I checked both sets of recent git logs and nothing popped out at me 
> >> as being related. Is it still out-of-tree?
> >>
> >> Thanks again,
> >>  - Tony
> >>
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> >>   
> >
> >
> 


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