[Xen-devel] Re: PCI Passthrough using GART on AMD CPUs?

[Jeff Williams <alcander@xxxxxx>]

Keir Fraser <keir.fraser <at> eu.citrix.com> writes:

> 
> The functionality of that patch is to allow dom0 to use the GART as a target
> aperture for 32-bit PCI devices to access memory above 4GB. The GART cannot
> possibly implement the functionality of the new AMD or Intel IOMMUs, as it
> does not intercept *every* DMA access issued by guest-controlled devices.
> The patch you would like to see is an impossibility.
> 
>  -- Keir
> 

Thank you Keir for clarifying this. I guess I'll just have to wait, or get an
Intel VT-d board. 

Too bad Skulltrail is still so expensive..

Jeff




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