On Tue, May 05, 2015 at 05:39:57PM +0200, Benjamin Gaignard wrote:
Since few months I'm looking for Linaro to how do Secure Data Path (SPD). I have tried and implemented multiple thinks but I always facing architecture issues so I would like to get your help to solve the problem.
First what is Secure Data Path ? SDP is a set of hardware features to garanty that some memories regions could only be read and/or write by specific hardware IPs. You can imagine it as a kind of memory firewall which grant/revoke accesses to memory per devices. Firewall configuration must be done in a trusted environment: for ARM architecture we plan to use OP-TEE + a trusted application to do that.
One typical use case for SDP in a video playback which involve those elements: decrypt -> video decoder -> transform -> display
Sounds like a good enough reason not to implement it ever.