Re: Hacking QEMU/KVM to use unused graphics adapters

[Muli Ben-Yehuda <muli-7z/5BgaJwgfQT0dZR+AlfA@public.gmane.org>]

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
-- 
SYSTOR 2007 --- 1st Annual Haifa Systems and Storage Conference 2007
http://www.haifa.il.ibm.com/Workshops/systor2007/

Virtualization workshop: Oct 29th, 2007 | Storage workshop: Oct 30th, 2007

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