From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Subject: Re: [PATCH 08/13] OMAP3: PM: Deny MPU idle while saving secure RAM Date: Fri, 19 Nov 2010 15:02:06 -0600 Message-ID: <4CE6E5CE.7010502@ti.com> References: <1290131698-6194-1-git-send-email-nm@ti.com> <1290131698-6194-9-git-send-email-nm@ti.com> <87eiahckba.fsf@deeprootsystems.com> <9f54a2ec7fc8c27fc57c2aac9bad5405@mail.gmail.com> <4CE6B2D4.1030201@ti.com> <7ae7a7b138d09fc819e16f213e81d3bd@mail.gmail.com> <877hg9ayox.fsf@deeprootsystems.com> <4CE6DB9E.9000708@ti.com> <87y68p3uee.fsf@deeprootsystems.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from na3sys009aog101.obsmtp.com ([74.125.149.67]:34208 "EHLO na3sys009aog101.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755747Ab0KSVCK (ORCPT ); Fri, 19 Nov 2010 16:02:10 -0500 Received: by mail-vw0-f53.google.com with SMTP id 8so481532vws.12 for ; Fri, 19 Nov 2010 13:02:10 -0800 (PST) In-Reply-To: <87y68p3uee.fsf@deeprootsystems.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Kevin Hilman Cc: Santosh Shilimkar , linux-omap , Jean Pihet , Vishwanath Sripathy , Tony Kevin Hilman had written, on 11/19/2010 02:55 PM, the following: [...] > Now, based on what you say below, it seems like there is no way to > guarantee that SMIs don't do this, so I guess we have no choice but to > protect them all. In that way, I do like the patch from Santosh - with the relevant changes we will need to incorporate. Do keep in mind that SMI is a secure service - In theory, there could be(and to my knowledge, are) custom secure services to do all kind of other things that are not power management related[1] - The only area we can protect is the one in idle/ power paths. [..] Ref: [1]http://groups.google.com/group/pandaboard/browse_thread/thread/b9a28cab32e10fd2/067acd6b61c1e9fa -- Regards, Nishanth Menon