Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp393654ybl; Fri, 31 Jan 2020 00:39:06 -0800 (PST) X-Google-Smtp-Source: APXvYqxjUj6vyMBSomTJyUKYabB8aEuJ1oWF5vBsHVc+0dV5qTSGdzodt+XjInS7/aDdA8B/HN4s X-Received: by 2002:a9d:4e92:: with SMTP id v18mr6372251otk.47.1580459946427; Fri, 31 Jan 2020 00:39:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1580459946; cv=none; d=google.com; s=arc-20160816; b=qUQ56g4LFF6/eDR5dVV/x8j+9iVo1OqM9PjTspMUghYYhTHbgTSJ5IvvoDyVFvWr63 3rpieMFn3huziq64Xzi3SOVMYfI91BSph5PzoghJ4Y1crIP5CTqIokJXMVR4WeSXYnSd H8TTquc7nyaRjk76fK+jeEMclip0bZyQjsgULR12N5B6Jmo0EJTuSqu+6rHZdIgZ/ksN tJz0lNppmTG8YsJ3QYSAj2kRKVKQwOsWsK7Wa+lsGYm0EvqtujrroywI6PkWL00DVDvO itGxzLqzYK1tk0HC/PXcAdmvkQaYnyfpzkZSqd9YTL27w+7AXwJ95wtwTfUI+S7lHgjR k2gQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:user-agent:content-language:accept-language:in-reply-to :references:message-id:date:thread-index:thread-topic:subject:to :from:dkim-signature; bh=RvByVWKDnR1khDO+OZk/bWtvJxxsg3zo5oWTGlVFTCI=; b=AOPj9rDwusNQZJfLZfnTWb8JiI/9b1YrOAWugsFIn7LtUWvCpGvxN2oq+c9hU9DsaZ UxgLdAQcvo2zEJkXgeezBrZJUi/Bj2spGz/fIhT9XWzWF8wftnLR8xPoI4HhjUatgbVE UvL+axf5bDPbzw32gVyuxriF5YMoUKP+MaHhdG90bP7mgn2P4lrau9WFO+rdIKAPUCOT 3ODcV5ThfSh6gihtojHTK8P+FIHGCbWKpHIJurPolfzoH5Uas3//+0p8jZW3jJGMPPIx FF1jiTRLSqOTnaRRXoZVW9kwpbOvpCjmyZ0hICnoolSY8UYJQssQ81fb24DmFKh8QnDk kN2g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@st.com header.s=STMicroelectronics header.b=cW7pJggb; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=st.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id f194si4167742oig.243.2020.01.31.00.38.54; Fri, 31 Jan 2020 00:39:06 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@st.com header.s=STMicroelectronics header.b=cW7pJggb; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=st.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728182AbgAaIh4 (ORCPT + 99 others); Fri, 31 Jan 2020 03:37:56 -0500 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:36350 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728099AbgAaIh4 (ORCPT ); Fri, 31 Jan 2020 03:37:56 -0500 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00V8WWYv021065; Fri, 31 Jan 2020 09:37:35 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=STMicroelectronics; bh=RvByVWKDnR1khDO+OZk/bWtvJxxsg3zo5oWTGlVFTCI=; b=cW7pJggbx3yrKAIItVkeJdJz8XFnekW5VBKJ9+R15zPyciyniAlMLSVdQRu/O5Orr219 PyXaMkzgz7N0xEON0xL6FkfbNArnfv0lm3+kBIxEo4FRQvEdCcJqibbjE6/JmFS5eH96 DDw5g6wKxrryDoLCklMK1UIG8HMRBWXwSOv0OJ3V/n81YSTFERFSTZ84KkkrvlXysKGq xv0/fU2qMMYE+kkQ+6SMkT5zAzlfjXnEgzOMsnFQLQOhEy+m/626IeY/wChEIwxLRMl+ 8d3mCNttMM79G87ZeevoOkNeNZoVzv+QNuva2+PwX3WRjY8MI6xOmBqaKsgNxr9s9VjM RQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2xrc13mmns-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 Jan 2020 09:37:35 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 4450910003B; Fri, 31 Jan 2020 09:37:28 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag7node3.st.com [10.75.127.21]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 03CB921FEBF; Fri, 31 Jan 2020 09:37:28 +0100 (CET) Received: from SFHDAG3NODE3.st.com (10.75.127.9) by SFHDAG7NODE3.st.com (10.75.127.21) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 31 Jan 2020 09:37:27 +0100 Received: from SFHDAG3NODE3.st.com ([fe80::3507:b372:7648:476]) by SFHDAG3NODE3.st.com ([fe80::3507:b372:7648:476%20]) with mapi id 15.00.1347.000; Fri, 31 Jan 2020 09:37:27 +0100 From: Benjamin GAIGNARD To: Greg KH , Linus Walleij , "robh@kernel.org" , "Loic PALLARDY" , "arnd@arndb.de" , "devicetree@vger.kernel.org" , "system-dt@lists.openampproject.org" , "s.hauer@pengutronix.de" , "linux-kernel@vger.kernel.org" , "lkml@metux.net" , "linux-imx@nxp.com" , "kernel@pengutronix.de" , "sudeep.holla@arm.com" , "fabio.estevam@nxp.com" , "stefano.stabellini@xilinx.com" , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH v2 2/7] bus: Introduce firewall controller framework Thread-Topic: [PATCH v2 2/7] bus: Introduce firewall controller framework Thread-Index: AQHV1fD3WqS5xyjWNkazyajQl95bjqgAKU6AgAANnwCAAARlAIAAO2IAgADdioCAAALMAIAAF6SAgAL4AQA= Date: Fri, 31 Jan 2020 08:37:27 +0000 Message-ID: <0b109c05-24cf-a1c4-6072-9af8a61f45b2@st.com> References: <20200128153806.7780-1-benjamin.gaignard@st.com> <20200128153806.7780-3-benjamin.gaignard@st.com> <20200128155243.GC3438643@kroah.com> <0dd9dc95-1329-0ad4-d03d-99899ea4f574@st.com> <20200128165712.GA3667596@kroah.com> <62b38576-0e1a-e30e-a954-a8b6a7d8d897@st.com> <20200129095240.GA3852081@kroah.com> <20200129111717.GA3928@sirena.org.uk> In-Reply-To: <20200129111717.GA3928@sirena.org.uk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.75.127.51] Content-Type: text/plain; charset="Windows-1252" Content-ID: <638172DDBE744F46AA57A5E08293B1A9@st.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-31_02:2020-01-30,2020-01-31 signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/29/20 12:17 PM, Mark Brown wrote: > On Wed, Jan 29, 2020 at 10:52:40AM +0100, Greg KH wrote: > >> It just needs to be part of the bus logic for the specific bus that this >> "firewall" is on. Just like we do the same thing for USB or thunderbolt >> devices. Put this in the bus-specific code please. > I'd expect that this is going to affect at least platform and AMBA > buses. Correct me if I'm wrong but creating a new type of bus would mean that all the drivers living on this bus must be changed to register=20 themselves on this bus ? Or does a solution exist to let them live on the platform bus and call=20 firewalled bus before been probed ? All the impacted drivers could work on the existing bus with or without=20 the firewall so I don't want to break that. Benjamin