Messages in this thread | | | Date | Wed, 17 May 2006 15:16:27 +0300 | From | Avi Kivity <> | Subject | Re: Wiretapping Linux? |
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Joerg Pommnitz wrote: > Additionally its listening on the system bus. Question: Can it tap into > data addressed to another peripheral (say the hd controller)? If so, then > only the system RAM is outside its scope. >
A pci device can read system RAM and other memory-mapped PCI devices (such as display framebuffers) using DMA. In addition, a pci (but not pci-express) device can snoop on pci bus traffic to other devices. Typically, however, hard drive controllers will be integrated into the chipset so the data is not on the bus.
-- error compiling committee.c: too many arguments to function
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