Re: [Xen-devel] Re: PCI passthrough and 3.3.1/3.4.0

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Unfortunately this is not the case: as far as I know there is no
> pci-frontend yet, so pass-through is still not possible with vanilla
> linux as domU...

I was considering that (perhaps non-obviously!) as being "dom0-type" 
functionality.  But I should have said so, so thank you for pointing it out.

Part of the code required (aside from pcifront itself) would actually be code 
to make DMA work properly - code which dom0 has to have whereas an 
unprivileged domU does not.  I assume that this code will go into the kernel 
if basic dom0 support is merged; that might make a pcifront in Linux upstream 
somewhat more likely.  Fingers crossed!

Cheers,
Mark

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