linux-kernel - Re: [RFC] How implement Secure Data Path ?

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Message-ID: <20150507135212.GD30184@phenom.ffwll.local>
Date:	Thu, 7 May 2015 15:52:12 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Thierry Reding <treding@...dia.com>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Benjamin Gaignard <benjamin.gaignard@...aro.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Hans Verkuil <hverkuil@...all.nl>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Rob Clark <robdclark@...il.com>,
	Dave Airlie <airlied@...hat.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Tom Gall <tom.gall@...aro.org>
Subject: Re: [RFC] How implement Secure Data Path ?

On Thu, May 07, 2015 at 03:22:20PM +0200, Thierry Reding wrote:
> On Wed, May 06, 2015 at 03:15:32PM +0200, Daniel Vetter wrote:
> > Yes the idea would be a special-purpose allocater thing like ion. Might
> > even want that to be a syscall to do it properly.
> 
> Would you care to elaborate why a syscall would be more proper? Not that
> I'm objecting to it, just for my education.

It seems to be the theme with someone proposing a global /dev node for a
few system wide ioctls, then reviewers ask to make a proper ioctl out of
it. E.g. kdbus, but I have vague memory of this happening a lot.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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