Re: [PATCH 01/24] Add the ability to lock down access to the running kernel image

[David Howells]

Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:

> > +	  drivers from functioning because allowing manual configuration of
> > +	  hardware parameters is forbidden, lest a device be used to access the
> > +	  kernel by DMA.  This mostly applies to ISA devices.
> 
> 	Is DMA from non-ISA devices OK, or did I miss seeing that patch?

The issue is where you can directly command a device to do DMA, possibly by
using the wrong driver.  Ask Alan Cox.

David