Maybe I’ve been dealing with IOMMUs for too long, but Joanna Rutkowska’s Black Hat DC 2007 presentation “Beyond the CPU: Defeating Hardware Based RAM Acquisition” seems to state the obvious in several different – sensationalist – ways. If you have a PCI device that does DMA, its memory accesses are controlled and potentially redirected by the various controllers between the device and memory. Well, duh.
The comments quoted in this blog entry are fairly amusing too.
Muli Ben-Yehuda's journal 