From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10B3AC3F68F for ; Sun, 2 Feb 2020 12:23:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DC65F2067C for ; Sun, 2 Feb 2020 12:23:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580646235; bh=fWBjZ93MKqpXWAx41RjCUrJ+LeLwV8ChrgICmHyrAe0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=zFqp4E5BiYrpxmnd4iuKnTFFkwLqbqmZBjyFG8AtnNAolMt7k0gjaI+vmO643zC+y J72kef/VWBG2Bzia7+RCNQfGLJiLnYythoDiBn6TSbJIJQAv9CAtBPw0tbcissr7Rm CAatX6Jl681RJ+bRQryQ8/SuhmsFrwQex3knrt5c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726747AbgBBMXz (ORCPT ); Sun, 2 Feb 2020 07:23:55 -0500 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:39602 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726044AbgBBMXy (ORCPT ); Sun, 2 Feb 2020 07:23:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=yQDGYskfy6d4Ic5b9Ykr6AUmvD96h/wBFQChrF6vatc=; b=pBnPvZMG0NcIWoli8sT3UHktF anTG1iGY05tgNOsFyX5hIPPW/VTGfNYm8/2uCi0UVzUXNa26rMqY4TiyUMAwOtQ1rjxEchHCJyqu1 pX82Pfnfb5HOo4BY6OSK2nF20SNSe7qQ4Mpn5idNjKkhfVE8fJHCMn2R5YIgdx+YrOO7I=; Received: from [151.216.144.116] (helo=fitzroy.sirena.org.uk) by heliosphere.sirena.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iyEHx-0006xw-Bz; Sun, 02 Feb 2020 12:23:45 +0000 Received: by fitzroy.sirena.org.uk (Postfix, from userid 1000) id EE321D00D65; Sun, 2 Feb 2020 12:23:44 +0000 (GMT) Date: Sun, 2 Feb 2020 12:23:44 +0000 From: Mark Brown To: Florian Fainelli Cc: Benjamin GAIGNARD , Sudeep Holla , Mark Rutland , "robh@kernel.org" , Loic PALLARDY , "arnd@arndb.de" , "devicetree@vger.kernel.org" , "gregkh@linuxfoundation.org" , "s.hauer@pengutronix.de" , "linux-kernel@vger.kernel.org" , "system-dt@lists.openampproject.org" , "lkml@metux.net" , "linux-imx@nxp.com" , "kernel@pengutronix.de" , "fabio.estevam@nxp.com" , "stefano.stabellini@xilinx.com" , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "Robin.Murphy@arm.com" Subject: Re: [PATCH v2 0/7] Introduce bus firewall controller framework Message-ID: <20200202122344.GV3897@sirena.org.uk> Mail-Followup-To: Florian Fainelli , Benjamin GAIGNARD , Sudeep Holla , Mark Rutland , "robh@kernel.org" , Loic PALLARDY , "arnd@arndb.de" , "devicetree@vger.kernel.org" , "gregkh@linuxfoundation.org" , "s.hauer@pengutronix.de" , "linux-kernel@vger.kernel.org" , "system-dt@lists.openampproject.org" , "lkml@metux.net" , "linux-imx@nxp.com" , "kernel@pengutronix.de" , "fabio.estevam@nxp.com" , "stefano.stabellini@xilinx.com" , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "Robin.Murphy@arm.com" References: <20200128153806.7780-1-benjamin.gaignard@st.com> <20200128163628.GB30489@bogus> <7f54ec36-8022-a57a-c634-45257f4c6984@st.com> <20200128171639.GA36496@bogus> <26eb1fde-5408-43f0-ccba-f0c81e791f54@st.com> <548b1427-cf6e-319a-36e2-c3e9363b930d@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="4jz2RIiWkXBLiaBi" Content-Disposition: inline In-Reply-To: <548b1427-cf6e-319a-36e2-c3e9363b930d@gmail.com> X-Cookie: Programming is an unnatural act. User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --4jz2RIiWkXBLiaBi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Jan 31, 2020 at 12:48:33PM -0800, Florian Fainelli wrote: > Like Robin and Sudeep here, I do not understand why the kernel should > have any business in this, let alone allowing blocks to change owners, > that sounds contrary to the purpose of a firewall being controlled under > an untrusted entity (Linux). Can we rely on there being a more trusted level of software than Linux on a system? It wasn't standard to have anything on 32 bit Arm systems as far as I remember so you could end up with some IP blocks intended to support TrustZone sitting idle. --4jz2RIiWkXBLiaBi Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl42v1AACgkQJNaLcl1U h9Ad2Qf/Z89ElUT49FpCeQbf2hYD+rbmBZfToVl5iOvMgypip56DLpLz7Z9pg+fM XNUGFiieZuTdvl02zzZNBQxe/G3sdoWmFREGsjq7rhCuoD8DZCYfZa/YYhOm7ME4 7txqcaZqSxKc1PQg1A6TNr/ItFpaWJ9sJPr61uOnPE0dDASNagjEARUNlV2wqW3f z3HmQn3H7y+qffq+pHj11fNLLAMjs90PKztzqOFrhSUe5CBphAYH4mGFk9hpVZUq r1kMsN6SjmINlLZ/XI1b03U3QnQMJLjVoDjtBpLKc5MQZMfuqx/Q6X/6Pp4RXUfJ 2mrNWRU65pMJeuVGwmd5Brs59iLTgA== =jc/v -----END PGP SIGNATURE----- --4jz2RIiWkXBLiaBi--