linux-kernel - Re: [PATCH 1/5] msm: Secure Channel Manager (SCM) support

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Message-ID: <29863.1291665648@localhost>
Date:	Mon, 06 Dec 2010 15:00:48 -0500
From:	Valdis.Kletnieks@...edu
To:	Jeff Ohlstein <johlstei@...eaurora.org>
Cc:	Daniel Walker <dwalker@...eaurora.org>,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stephen Boyd <sboyd@...eaurora.org>,
	Abhijeet Dharmapurikar <adharmap@...eaurora.org>,
	David Brown <davidb@...eaurora.org>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH 1/5] msm: Secure Channel Manager (SCM) support

On Sun, 05 Dec 2010 23:16:14 PST, Jeff Ohlstein said:

> SCM is the protocol used to communicate between the secure and
> non-secure code executing on the applications processor. 

Does the presence of SCM hardware imply SMP?  From reading this, it's unclear
why the dependence on SMP - it looks like scm.c is something that hardware that
has one ARM processor and a 'secure processor' would still want.  Or is the
'secure processor' just another (arbitrarily labeled) ARM CPU participating
as a full SMP processor?

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