[Gllug] performance of xen dom0 vs native linux

[Richard Jones]

On Tue, May 12, 2009 at 08:38:54PM +0100, Nix wrote:
> Bah, guests can often command bus-mastered DMA transfers to anywhere in
> RAM. Forget *rebooting*, we can root you on the fly!

Don't want to get too picky here, but VT-d can stop this.  VT-d is
partly a function of the Northbridge, so it can remap DMA transfers to
DRAM based on the PCI device requesting it.

http://www.intel.com/technology/itj/2006/v10i3/2-io/5-platform-hardware-support.htm

Rich.

-- 
Richard Jones
Red Hat
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