[RFC] ARM DMA mapping TODO, v1
arnd at arndb.de
Thu Apr 28 08:12:40 EDT 2011
On Thursday 28 April 2011, Catalin Marinas wrote:
> On Thu, 2011-04-28 at 01:15 +0100, Valdis.Kletnieks at vt.edu wrote:
> > On Wed, 27 Apr 2011 12:08:28 BST, Catalin Marinas said:
> > > The current version of the ARM ARM says "unpredictable". But this
> > > general definition of "unpredictable" does not allow it to deadlock
> > > (hardware) or have security implications. It is however allowed to
> > > corrupt data.
> > Not allowed to have security implications, but is allowed to corrupt data.
> By security I was referring to TrustZone extensions. IOW, unpredictable
> in normal (non-secure) world should not cause data corruption in the
> secure world.
That definition is rather useless for operating systems that don't use
Trustzone then, right?
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