Re: Wiretapping Linux?

[Avi Kivity]

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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/