From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Thu, 28 Apr 2011 09:27:39 +0100 Subject: [RFC] ARM DMA mapping TODO, v1 In-Reply-To: <11431.1303949729@localhost> References: <201104212129.17013.arnd@arndb.de> <201104271243.16868.arnd@arndb.de> <1303902508.15101.21.camel@e102109-lin.cambridge.arm.com> <11431.1303949729@localhost> Message-ID: <1303979259.26744.3.camel@e102109-lin.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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. -- Catalin