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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BB10C6379F for ; Tue, 14 Feb 2023 16:43:51 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 860926B0072; Tue, 14 Feb 2023 11:43:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 810306B0074; Tue, 14 Feb 2023 11:43:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6B0DB6B0075; Tue, 14 Feb 2023 11:43:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 5C30C6B0072 for ; Tue, 14 Feb 2023 11:43:50 -0500 (EST) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 19DC940604 for ; Tue, 14 Feb 2023 16:43:50 +0000 (UTC) X-FDA: 80466469020.13.8E8CA2F Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by imf08.hostedemail.com (Postfix) with ESMTP id 30A9C160015 for ; Tue, 14 Feb 2023 16:43:45 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=bMWuFWP1; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf08.hostedemail.com: domain of dan.j.williams@intel.com designates 192.55.52.43 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1676393026; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Bf19+GqZdyBUa2M+KLC4NWRWvx6V4y69gY0Htj+LPHc=; b=xjA3U8l9i08Ohwq09eoIN0HmrKbtIfLlRHO+L8xqW57D9/jWmJUdq/ZmDey+LWwoC2K54D RftquWs0L6meBDsFqa09FIVcooAdI8UXEiH+9qU+S62xdKnv4muImTUQOAvy2kXeFODjwT +J5QD0xBS5tMHeO0Sn54osgwcyx/IWo= ARC-Authentication-Results: i=2; imf08.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=bMWuFWP1; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf08.hostedemail.com: domain of dan.j.williams@intel.com designates 192.55.52.43 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1676393026; a=rsa-sha256; cv=fail; b=cMM5yfMJIO06p0CrPJh/xvZhVEfMAOx5sJ+L39F2hxRWme+EmvTLsKJt9tfRbkSTVblP2e up34Yym1+Lcp+kK3HCl9geeefzX3GTU19ICFlVWR72yBdhN0eb9sgIhIBot5lnJ7Z++VyY RY/zp/2odv5IGlw7o4CeRpfNK5YOFTY= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1676393026; x=1707929026; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=3tvw/QI2D6ZTdCszmgUUILhpm8UFQ9Woe8Lafhd7yBQ=; b=bMWuFWP1buG9SIqLM5iozWSzxss87b2gaWiAJ3cbtCA7Rn1wje69Jfb1 JMH1yiEP1gyqnLndODHL5XRVIvxQgNbEZV53cQGU6WHOC87VQEEsCh+Lm hDw2LIAd0mcmhqNYBUaMfJApCv/ZRNJ9i879zAw/3rAScZFvo8cnSCAE2 yzkGz1iYhL5Al6UYmV14uYjB1wmk1sukx0ZGxtgW1miHHhVZKfhh/fDzI yRUUCDI/B7Ig2EZZevSYTtPf1ZdzntATAbRvctWz/alWcjHYuvMQJWAgr vgi1B9I2SHT5o2SSOJGYwag62c+0nZ/P977zlrieH3n6Zlv2eHZTFrMQn A==; X-IronPort-AV: E=McAfee;i="6500,9779,10621"; a="417422828" X-IronPort-AV: E=Sophos;i="5.97,297,1669104000"; d="scan'208";a="417422828" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2023 08:43:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10621"; a="778408876" X-IronPort-AV: E=Sophos;i="5.97,297,1669104000"; d="scan'208";a="778408876" Received: from fmsmsx602.amr.corp.intel.com ([10.18.126.82]) by fmsmga002.fm.intel.com with ESMTP; 14 Feb 2023 08:43:44 -0800 Received: from fmsmsx610.amr.corp.intel.com (10.18.126.90) by fmsmsx602.amr.corp.intel.com (10.18.126.82) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Tue, 14 Feb 2023 08:43:43 -0800 Received: from fmsedg601.ED.cps.intel.com (10.1.192.135) by fmsmsx610.amr.corp.intel.com (10.18.126.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16 via Frontend Transport; Tue, 14 Feb 2023 08:43:43 -0800 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.168) by edgegateway.intel.com (192.55.55.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.16; Tue, 14 Feb 2023 08:43:43 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=fur7xvapgA4W16qGJxEWCt6xzyePX5KOnseLFYnDewNCsu8vJx8Hc3x28cT78oG6ZPsggYkfe4izPQ7qcYWwwRJj4CkwkOEMzF2tRLKsJsCjqX9YrXtjsE3IcX1xIgztIaVowh2W8+U5YLiXRIIpWiuWBP9iKdk3lsj+Itr4wK/uMYVsvIWQodTdp3UWQG1WZ4CWNHLp/2Qerd+56gYVMVMWEsUOZzLeT5gCn7bLM/4TJKOQJxZG+bvTMxiiFN4kS7IvjSkx28URCuvw+SYVwu/jcJUwuMFjh5DJ9qMk4Xs9Fs+BkoBP5sSWbmS4M6GO+E7nA5EpMAQjslBIof8sEA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Bf19+GqZdyBUa2M+KLC4NWRWvx6V4y69gY0Htj+LPHc=; b=P52SvY054qIJ5mBKAzv/Iy1MRSQ/Sb4hZ+414oOX9pJKPHnkwoTk1xMu13q83QSIxGYczzd/XWAWuGfJK5PkMFD/7CgMw4p+SCap5xyIKOnTRbOPl/reaOfxY/pyN2ZXi9af0kOE1sCHCZA4mIBPq8nsm0HhjXyPHbmWR32u5z6Yws3UH+6lH4csG9/jssAL6Hrf/lTnPRN+YgbvoK8J+bJHc5J7eajlErmtgnyt3W2V+S1cACiLe4g0c4+vtjNHW8eK+cZqO60wdP+CHC/AEFMAAwzLqddXrDlyvfkXQ/b1MirSufvl039TNl6ByeRyUaVIECBvQfjKEhI7pJKa7A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Received: from PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) by PH0PR11MB5144.namprd11.prod.outlook.com (2603:10b6:510:3e::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6086.26; Tue, 14 Feb 2023 16:43:42 +0000 Received: from PH8PR11MB8107.namprd11.prod.outlook.com ([fe80::421b:865b:f356:7dfc]) by PH8PR11MB8107.namprd11.prod.outlook.com ([fe80::421b:865b:f356:7dfc%5]) with mapi id 15.20.6086.024; Tue, 14 Feb 2023 16:43:42 +0000 Date: Tue, 14 Feb 2023 08:43:39 -0800 From: Dan Williams To: Jonathan Cameron , Dan Williams CC: , Fan Ni , , , , Subject: Re: [PATCH v2 13/20] cxl/region: Add region autodiscovery Message-ID: <63ebba3b6fe55_32d6129475@dwillia2-xfh.jf.intel.com.notmuch> References: <167601992097.1924368.18291887895351917895.stgit@dwillia2-xfh.jf.intel.com> <167601999958.1924368.9366954455835735048.stgit@dwillia2-xfh.jf.intel.com> <20230210180958.00002e5a@Huawei.com> <63e6b89581c3c_1db5d029467@dwillia2-xfh.jf.intel.com.notmuch> <20230214132336.00005915@Huawei.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20230214132336.00005915@Huawei.com> X-ClientProxiedBy: SJ0PR03CA0334.namprd03.prod.outlook.com (2603:10b6:a03:39c::9) To PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH8PR11MB8107:EE_|PH0PR11MB5144:EE_ X-MS-Office365-Filtering-Correlation-Id: 03d762e7-b391-4296-a7e0-08db0eaaa173 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH8PR11MB8107.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(346002)(376002)(39860400002)(396003)(136003)(366004)(451199018)(4326008)(8676002)(66946007)(66556008)(66476007)(6666004)(6486002)(478600001)(5660300002)(26005)(186003)(6512007)(9686003)(8936002)(2906002)(316002)(6506007)(41300700001)(4744005)(86362001)(82960400001)(110136005)(38100700002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?Ucz4E+xqg1qrgXRaOwjHIed6n9QHuOftTkcXpidGbkC68sBTN4eppasOXQQk?= =?us-ascii?Q?zqe1PTFP7FhPtUkQ3QDwcFcKT3aFtlaBkCpESixCHGrDK8/jVLqQU+YQAFj+?= =?us-ascii?Q?CguZQKxyCZUXBnqcQ2OgIHBEU7UFtZFo1mx+IUV47e8S5Afnpizgk40Q23Og?= =?us-ascii?Q?5IrJw6c8CszFvwD8dF/YSes1cpQyxDN5aBJDe2yQ7XzSKmi+zOSpEfq+rDCE?= =?us-ascii?Q?BumRjtX5Dg/V4pjQAft/2+YGEKTFonGRwK9gJv2E8tqW6yvbOVlWbPTVOhjz?= =?us-ascii?Q?aq0UJuhkq7vcOg71KTRU3tfsj4jQmaMwP4eSx4wSfVY5/fWUb3W2S3XuDVb4?= =?us-ascii?Q?6PIVrIKhkw4aG2qqII3STSz4IoebB3Q9ZRhgIIi/QRoKUyJEuwuwCthCri6e?= =?us-ascii?Q?dgyQNeLXaHXI71kOAyJyl5QcYZrDo5FMJqL56bUBhVEbYUOgvGKxKMi5gxaW?= =?us-ascii?Q?GkRtewi8wmCmFdOGRhY6honRSfrgjYIBsuJzdmIEwflhKEfhKH5uqeMRhcsH?= =?us-ascii?Q?nASJhcK//B7m0Hwy09xlqwk0iN9C7wFcaBSkFtQeM32xteUpaUvscH35qLJR?= =?us-ascii?Q?cPaE+MjhluytGvDCG4Thzwu3/Esnu3qSHZuEKskjnSzoQuuHcmOlujfgxjy1?= =?us-ascii?Q?AT8Cxf6Jkmq56q+9TOuFTW+ciJDGpeKIcUKHmS1epZo8Bw8FNLpMwSgCE57F?= =?us-ascii?Q?CYs3xv5WeHHOYus28OJRFv/tO3iI9n1Khv7nIqMZpPkwNyEHJJ0iVq9MQ2aw?= =?us-ascii?Q?5OHGVFM059bRpLF1pDimdnHCRpr/eM2FnpTyvndlpWbBOH/279/zmkRjG2MH?= =?us-ascii?Q?VrQM3i+up+pR66i5KS2aXU02W+nMfjXxSdt14g5neZET6b8KK9jnUNshIOJo?= =?us-ascii?Q?ltIIp0SAKWsBwHtXVxhSlPYXIlk9rikvWjK8tJZIpPrFUrfWUCOTENhtSFGF?= =?us-ascii?Q?lYngQvpeuCG9yU9dkCS5QO6uhgT0af/E9yqxXnnP7YaqLj11bJ+XCOd39hef?= =?us-ascii?Q?94ck5KnxTo1uNxwmpVP4Xy+Z9uJCQPGamGNLuP1P3l8M73s/Q16g7zUilIf7?= =?us-ascii?Q?n/A6DhvoowHTJfX9UmGTRjv0yHzpx3mfw1h9PNFAzOcrj0VIkJkf5GRP5dmv?= =?us-ascii?Q?+fXp6HMn1hQpI64oWNHJl//FMliJuN2X0+rxJphEzLVpIgRw21PYSm6U7/Fn?= =?us-ascii?Q?DpxkthKDVSwkuYsZSiNVLQCmJ4S4bFpcWgdvAe3eUdmwlEy5t96RqyntRlD4?= =?us-ascii?Q?Bb/mqdy2E1OYKuTj/awxk8d0sDjRw78/PSt1ABCDGqq6+DTbednGDhIiI071?= =?us-ascii?Q?FcsW5rZS3OuXrczfrcZ6DbWZTlBv9pfW5kFtNXLSNgOsewBeF8efcFPWLtMX?= =?us-ascii?Q?+tiintyJyLQLnIWV+WBGA+DK7cf3oJMvICPqMzS3aSQxSemhd3gpZk2or/9C?= =?us-ascii?Q?9uV3iE5mfAEJ+xscNuLKIxMPY3mitMJJWPATpA3VaLLcuwuAt9G9cVAgiJWY?= =?us-ascii?Q?J239+STmzFlUcPceNrCK6LED9HMg10gbkYYo+v90nm8Of7gPmjh3DRBOonGr?= =?us-ascii?Q?lrrIaviXDiIIYBLdtMYiMQ/+7DsrlRyQBHsufU59+UKOJGeK9sAG+rRaUMr6?= =?us-ascii?Q?+w=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 03d762e7-b391-4296-a7e0-08db0eaaa173 X-MS-Exchange-CrossTenant-AuthSource: PH8PR11MB8107.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Feb 2023 16:43:42.0404 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: TowZSjUtMxzXdRV4qkGQgrZw5T7UZWGyIzLVURYDoR7VARFPV4aPxVZVcfTRqmz7WVrs0QEdnImb8ONDyiHaCvmqrucDP1nLTCapp3GX8Ek= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR11MB5144 X-OriginatorOrg: intel.com X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 30A9C160015 X-Rspam-User: X-Stat-Signature: 3g4ihgioetyqbyzckp8gr58c8obkc5cb X-HE-Tag: 1676393025-195412 X-HE-Meta: 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 Hi5oWfjC 9MZrcOPVm07ym/Q5kIlaiq0ajzW6A1f5EGOieFjMRJajXfgaB6sGTtN1TzYY7Or5WPMbX7bx5wc2aKMNlWWiJiW4VI4cuiDErCvvGYiG36Kx1DdSLKapHs35N98vqDcICApukcaJn4c91IOQGMULaC+s+KD1cid2lcRC8Et/aIqCq7mgL5VRrmePRfkMFbcGGhK29d2Woo5ie1orKMxRUa1QiPJ3TEGzVynFkCtF/kkfRZCzrJtuCGzm4GLmBep7JDn7r X-Bogosity: Ham, tests=bogofilter, spamicity=0.000021, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Jonathan Cameron wrote: > > > > > > > /* > > > * If device_attach() fails the range may still be active via > > > * the platform-firmware memory map, otherwise the driver for > > > * regions is local to this file, so driver matching can't fail > > > + * and hence device_attach() cannot return 1. > > > > > > //very much not obvious otherwise to anyone who isn't far too familiar with device_attach() > > > > Hence the comment? Not sure what else can be said here about why > > device_attach() < 0 is a sufficient check. > > I'd just add the bit I added above that calls out the condition you are > describing is indicated by a return of 1. Got it.