Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753091AbaBERRf (ORCPT ); Wed, 5 Feb 2014 12:17:35 -0500 Received: from ring0.de ([5.45.105.125]:60332 "EHLO smtp.ring0.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752924AbaBERRe (ORCPT ); Wed, 5 Feb 2014 12:17:34 -0500 X-Spam-Report: * -0.0 NO_RELAYS Informational: message was not relayed via SMTP * -1.9 BAYES_00 BODY: Spamwahrscheinlichkeit nach Bayes-Test: 0-1% * [score: 0.0000] * -0.0 NO_RECEIVED Informational: message has no Received headers Date: Wed, 5 Feb 2014 18:17:29 +0100 From: Sebastian Reichel To: Pali =?iso-8859-1?Q?Roh=E1r?= Cc: Tony Lindgren , Linux OMAP Mailing List , LKML , freemangordon@abv.bg Subject: Re: [PATCH] ARM: OMAP2+: Add support for thumb mode on DT booted N900 Message-ID: <20140205171729.GA17974@earth.universe> References: <1391603582-11371-1-git-send-email-sre@debian.org> <20140205163117.GA15996@earth.universe> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="7AUc2qLy4jB3hD7Z" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --7AUc2qLy4jB3hD7Z Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, On Wed, Feb 05, 2014 at 05:38:54PM +0100, Pali Roh=E1r wrote: > > I assumed, that the workaround is not needed for this device type. >=20 > That rx51 secure call must not be called on non secure devices (e.g. > qemu), because it cause kernel crash. So I thought that kernel should > write something like secure call is disabled on that device types. > Kernel code for errata 430973 will update ibe bit for non secure > devices. Do you see any advantage in having that message? > > I just added the warning for missing CONFIG_ARM_ERRATA_430973, > > because its very likely a misconfigured kernel. >=20 > Yes, it can be misconfigured kernel, but if you do not have any thumb > binary (like stock Maemo 5 system), then it is safe and OK. I think running this kernel may also be a potential security problem. If I understand it right the ARM core is left in an unstable state when you run Thumb code, so this may result in funny effects in the kernel? -- Sebastian --7AUc2qLy4jB3hD7Z Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJS8nIpAAoJENju1/PIO/qaDoEP/jUxpjyjriZBkOhRFXKglNJH mmBfeMYeBkFuNOvmjrqd8kmAEZauYMcWxIWaRRKY0ckvTp0ZDHWLPYYrZpf3cXa8 4nNKgl4pQZHKawxyniq0Nq6bQkaN3ozMIqrVDYvMQ78ZUElUOwUR6WGnwlqKYEUl wiLBWtJJjGumsYDmkRh2LOpK8B2cXztgvsECfuiv4P+3jS3vIi1dtpK/an65dju1 9aCDTYCWsAXISetOowGHuoMA3M3bcUPwYdZTM4DGn9eEFAxfEnnjK5HvUcLxrMxL WdZkbdkFg2LM8JDxO8Xuqt4pUmKpeTC0Mhini/xTnZl0NwFrxvVUQapgFy8QuRfX zHAJd81e5JsZbaKrv/zCrSPycJkmD8Sx/F4R33KxKvFhsGhwkMBrHP8rwtUPlm4b qTHmZWt4jJvBZRRT89NJIBh6kTibH7t0qKbUBdxg4gpIuyqijJkTTj5YxXi62nbm 5IMuHexJM7NBHSiNQesyZJJcQ+FuvQyTXabaeJe0u2Vad41eOjvLFjvHcbp7JmQ7 6Z3uCJ4etevXD6xh8hnvVdXcSilltifqtcBFOhEXGyj8y32uWSmGmyC+PItBIwra EnwKsQ/wpsrMgjxRP3OHkegE3i1EMqzmIomBUgheOyKyKOdmw4CBDdzEnF2FuhwW NxRJEqsZBWlYBKGBq5EQ =/oK1 -----END PGP SIGNATURE----- --7AUc2qLy4jB3hD7Z-- -- 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/