Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760699AbbEEQ15 (ORCPT ); Tue, 5 May 2015 12:27:57 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:52870 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760629AbbEEQ1w (ORCPT ); Tue, 5 May 2015 12:27:52 -0400 Date: Tue, 5 May 2015 09:27:52 -0700 From: Christoph Hellwig To: Benjamin Gaignard Cc: "linux-media@vger.kernel.org" , Linux Kernel Mailing List , "dri-devel@lists.freedesktop.org" , Hans Verkuil , Laurent Pinchart , Daniel Vetter , Rob Clark , Thierry Reding , Dave Airlie , Sumit Semwal , Tom Gall Subject: Re: [RFC] How implement Secure Data Path ? Message-ID: <20150505162752.GA12132@infradead.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1145 Lines: 21 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/