Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754317Ab1D1AQR (ORCPT ); Wed, 27 Apr 2011 20:16:17 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:50092 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751244Ab1D1AQP (ORCPT ); Wed, 27 Apr 2011 20:16:15 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3-dev To: Catalin Marinas Cc: Arnd Bergmann , linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] ARM DMA mapping TODO, v1 In-Reply-To: Your message of "Wed, 27 Apr 2011 12:08:28 BST." <1303902508.15101.21.camel@e102109-lin.cambridge.arm.com> From: Valdis.Kletnieks@vt.edu References: <201104212129.17013.arnd@arndb.de> <201104271243.16868.arnd@arndb.de> <1303902508.15101.21.camel@e102109-lin.cambridge.arm.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1303949729_5598P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Wed, 27 Apr 2011 20:15:29 -0400 Message-ID: <11431.1303949729@localhost> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Mirapoint-IP-Reputation: reputation=neutral-1, source=Fixed, refid=n/a, actions=MAILHURDLE SPF TAG X-Junkmail-Status: score=10/50, host=dagger.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A020206.4DB8B1A5.0007,ss=1,fgs=0, ip=0.0.0.0, so=2010-07-22 22:03:31, dmn=2009-09-10 00:05:08, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1174 Lines: 36 --==_Exmh_1303949729_5598P Content-Type: text/plain; charset=us-ascii On Wed, 27 Apr 2011 12:08:28 BST, Catalin Marinas said: > The current version of the ARM ARM says "unpredictable". But this > general definition of "unpredictable" does not allow it to deadlock > (hardware) or have security implications. It is however allowed to > corrupt data. Not allowed to have security implications, but is allowed to corrupt data. *boggle* :) (The problem being, of course, that if the attacker is able to predict/control what gets corrupted, it can easily end up leveraged into a security implication.) --==_Exmh_1303949729_5598P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFNuLGhcC3lWbTT17ARAofNAKCJq4YPwOGDwFc4TQEhpvtA36neHgCg2eAm 0Y4V85ENPqLJXiYPkjcjruY= =j/Ko -----END PGP SIGNATURE----- --==_Exmh_1303949729_5598P-- -- 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/