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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A3DEC433EF for ; Tue, 28 Jun 2022 14:24:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344905AbiF1OYS (ORCPT ); Tue, 28 Jun 2022 10:24:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241831AbiF1OYQ (ORCPT ); Tue, 28 Jun 2022 10:24:16 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A34AD2CDC3; Tue, 28 Jun 2022 07:24:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1656426255; x=1687962255; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=iP6rFGN4MVizacFDXq6Afq+IzlEelUMyR7YWaozVSFk=; b=HPltUJ6ONfZ+KHDCrwWP2e7DxCrBm1Xd5WHuz6bk4McSZtaK2chJGzHh h1p/0TOiU8CXRDJ4gPyl51WBQeB8TysnKoBrmrjoWbGJgx3nR7+hxt4EX THDOeYPzQQMn5Jh6sZVWgI8uaf1n5VSc7bVNAxs5vQgC0dhiAZkVgKsTY H//8fT34dOvWTAh5nVD2kwG9KkjQ6+ILSecdm4wvPu4EW5dnQK1IVV1kf 8SvbH/WQGsV8odF5U1+CAusK5KZS5p7udovrXAfL3fmB34AkfiKhXN1zO 9uDLgWUBvl+Ohsik3oxFUCqO5lsxn4utgc9Bw76KmIGunVCLUlBBqyUvm w==; X-IronPort-AV: E=McAfee;i="6400,9594,10391"; a="262163869" X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="262163869" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jun 2022 07:24:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="836693138" Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14]) by fmsmga006.fm.intel.com with ESMTP; 28 Jun 2022 07:24:15 -0700 Received: from orsmsx601.amr.corp.intel.com (10.22.229.14) by ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27; Tue, 28 Jun 2022 07:24:14 -0700 Received: from orsedg603.ED.cps.intel.com (10.7.248.4) by orsmsx601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27 via Frontend Transport; Tue, 28 Jun 2022 07:24:14 -0700 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (104.47.55.103) by edgegateway.intel.com (134.134.137.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2308.27; Tue, 28 Jun 2022 07:24:14 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NVqSP7pQl8Bi2Q5ZTFaU7DsY56mYV7+eLVeGKMQMMNtawrXXzDwCDsPeTtC5L+Ka0Y2fMxj+mWLB88nLkWKJxpEOKDVHc9OuZJkIKuSuUzK3cotAI5wflosbtpvr5qqzcYdisg5cyxnHGhWvzlydWVHrjlabis9VVd3XDKzVwl1KotxxQdCuWV3an3DXgmeIuxKNK3UCwnwSwmRclb9exvXLdyYhr3zRBLJao/VQWtBb6r6K2T895AFc350NEZ/yNojffBe6obTvjV1TZJFCg3NI9vs4mC3AXZNM70Q2JxKkC48NYEb/sYPgjpgJpk2Y1XCJnnu2A5Z93IPMGxwNeg== 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=1FWLgMHLgvmj+cL604b9YrwzXDji77zjZjd8AgExVYY=; b=Us+DGOja2/sw1Yh8Zi1277R/MqZRfOKViJK/6TUVLPl3FtwfxCRZpY5mD0bz/MfRuUudTt6QX/1DKV9lXR24pkt+uB56FkzbjsRwNzik72lMWL3VOS80rkkIMnMTaMzUOp00zEQ4IuF+nzLppgX+UHalu5/5kmLs1WETYQ+FdjBwozNUnZPI69Wf+xYHC7D6R1+O2LZaQXuQztzl5eC36oVuCu0PJHFhQhqKdd3OPlbXNS6SEgawwzB3i8qgrxaQFt8iNjHm/fMwAtgXFmEJSDNG07qFevknYyPg+Rs1rZHlDWpRbI6rDQkL2+xj1OWC64Mw1Qg+9efk/IUVvLNcAg== 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 Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from MWHPR1101MB2126.namprd11.prod.outlook.com (2603:10b6:301:50::20) by BN8PR11MB3780.namprd11.prod.outlook.com (2603:10b6:408:90::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5373.15; Tue, 28 Jun 2022 14:24:12 +0000 Received: from MWHPR1101MB2126.namprd11.prod.outlook.com ([fe80::f50c:6e72:c8aa:8dbf]) by MWHPR1101MB2126.namprd11.prod.outlook.com ([fe80::f50c:6e72:c8aa:8dbf%7]) with mapi id 15.20.5373.018; Tue, 28 Jun 2022 14:24:12 +0000 Date: Tue, 28 Jun 2022 07:24:08 -0700 From: Dan Williams To: Jonathan Cameron , Dan Williams CC: , , , , , "Ben Widawsky" Subject: Re: [PATCH 35/46] cxl/region: Add a 'uuid' attribute Message-ID: <62bb0f08eb1c1_169b9c29432@dwillia2-xfh.notmuch> References: <165603869943.551046.3498980330327696732.stgit@dwillia2-xfh> <20220624041950.559155-10-dan.j.williams@intel.com> <20220628112919.000067e6@Huawei.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20220628112919.000067e6@Huawei.com> X-ClientProxiedBy: CO1PR15CA0060.namprd15.prod.outlook.com (2603:10b6:101:1f::28) To MWHPR1101MB2126.namprd11.prod.outlook.com (2603:10b6:301:50::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b5a2d9df-eaea-4d99-faaf-08da5911df15 X-MS-TrafficTypeDiagnostic: BN8PR11MB3780:EE_ 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:MWHPR1101MB2126.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(346002)(376002)(396003)(39860400002)(366004)(136003)(6506007)(6666004)(316002)(2906002)(66476007)(478600001)(83380400001)(6486002)(186003)(8676002)(4326008)(5660300002)(4744005)(66556008)(26005)(66946007)(41300700001)(6512007)(9686003)(110136005)(86362001)(82960400001)(38100700002)(8936002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?pawm7HoS24uJtuNqrAzStsTrQDaq9TdNrEVZcZwFk+JRlA5/sIX29TjCCkN5?= =?us-ascii?Q?xlaefvHlEjuotomZtz5zy3r6q54ndI7Cq5gvLV8/laA0x1cLo5bIugkUoIhW?= =?us-ascii?Q?SkPWb6q17Sl6KCpjWocF7hDA4gM44Sv2/a9TJz6Tq39An9JhNE8AgJuNqEwp?= =?us-ascii?Q?cU7BrPE/R+S2P6scDpAkt1FKefMX1WeOvY0NStS0o/SPtKuut3UAHPDliD91?= =?us-ascii?Q?8lQ/lmHakHMB1nMJ9RB2lxrklFoHAPtE5K/dAmApMVFcJ+Hs6jj0NyloWud2?= =?us-ascii?Q?KHObmcS6pAuoOcmG1AXzRG9ga4oqbxxUE5olkP8gP0GW+KakJluh/3F6vOuy?= =?us-ascii?Q?v5YHpS1gArkyQvkylQnIpjwHcQU3fx7GRzTyGEuwf/6ihnj21cVvFgBoHafg?= =?us-ascii?Q?gkU2KJ/ckiaOOHoLaASAsiWar2R4udMfyC9CDIy6hURKGYnWIaQi7hpJrbkP?= =?us-ascii?Q?fgy0hXbEQIMOApQAbKfmhMTtOvpTES7WsOVflK/54WkPpngplGq3G6d1vtUS?= =?us-ascii?Q?Z09GE4OmNUHdfoAnOr0T4jjaniByjcS286yaDgQwdjMoA9wBVOJThnt/610E?= =?us-ascii?Q?WeifDcd6D2yHMtuTGFk6UiOhkryXw4JFQmZmbmjuF+J7a+jtiJPXQEGWn06P?= =?us-ascii?Q?RWs0AnLl0mb+gM5+Lv2ZnjKv+dpoIQLUvyr++FficlgSwECdYxCJBRvTxC65?= =?us-ascii?Q?GzlBD9/ZtexuZId8eCrDNTbmjfMQn7gVK64+dzbhEASDH5McD7R9eBtT/67d?= =?us-ascii?Q?IpT0VcUtH6ntZTEukQgdkEcPqY2N2lS+uvXFODTOo1ZkmGC5JCcREggWaWG2?= =?us-ascii?Q?SJ/WOkQdiK+8wcMYm1RG79POiHNurb/lYuKLfel8j5IzCXxa2gV9C0RMkwGN?= =?us-ascii?Q?asyeCCLRqXV7zHWYayvY6GpzqXFTCQrc3iv5eJT8SWMen5JgECCHvjIFqob8?= =?us-ascii?Q?+mtRbARhXj7ROdK9kMtdHIYKVqh6nRQagNpn07GULzFNRmBLvST8u46ErYIv?= =?us-ascii?Q?nNhp+e8uIVbhP5+BLyO+esmo3R4YI2OTO3o3IVTYJJ6livlqGFxp2ATWeWbL?= =?us-ascii?Q?8LT2PzcSt+vthSd5Uve9jTEZS07bvAIdISdG2tTTrEg8SoDtlhQ8SOy+VXXY?= =?us-ascii?Q?fCrxDUeqkpjdgmWCTwJDAevCm3dyDIOOAEDnCOlCHCwgPi/zyXKzylxu4Jl7?= =?us-ascii?Q?f4FCKiXl5oJ4J3S6Hf+bS5dD3LzjRzeNIaOemZMvA0wrt4xCiVBQQwLU3zQF?= =?us-ascii?Q?87ptL5PIFyX8mfAx/zlXMeBYsmiCWDkQeFcIM5W4rnM8COiWY/IdrEkhM0y4?= =?us-ascii?Q?lBSwmVFyKGQwOAqPPmfFrEwaS+X5ZpU+BCzMrz4IkBqNN+kubAcfHWFFyJPt?= =?us-ascii?Q?Ee6MEwXI1ZjmNybHvePxX2qhMuH0WrXv7v8ghefA7gsln9GQmITlS2XA9T9H?= =?us-ascii?Q?oitGHKjivjt2xzL8vf2IoERsbzhrDwKLj5Cz56ewOrdKEpT+PgpCr1YVJQVe?= =?us-ascii?Q?NNMka4To3mSeZIzMTN3/gS/R1ytKvEiDtWKWce2vN/gmgomufYro/QmmkxhW?= =?us-ascii?Q?fX/xJfY2WHojdk70QJWglolbXhvvIbWs5qtGazNKpM5KruzImsXJS/OnI+CC?= =?us-ascii?Q?GA=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: b5a2d9df-eaea-4d99-faaf-08da5911df15 X-MS-Exchange-CrossTenant-AuthSource: MWHPR1101MB2126.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jun 2022 14:24:11.9828 (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: d6ogCXPoWlOIPGy/msaTycw7mtyHwFUovJbEbkT7f8InbmQeqTIFoWoM9cREfLHCNw4cCbE6UeXbcJp7f62BTjNRyrMpc6LR3yFw50l8jrY= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR11MB3780 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Jonathan Cameron wrote: > On Thu, 23 Jun 2022 21:19:39 -0700 > Dan Williams wrote: > > > From: Ben Widawsky > > > > The process of provisioning a region involves triggering the creation of > > a new region object, pouring in the configuration, and then binding that > > configured object to the region driver to start is operation. For > > persistent memory regions the CXL specification mandates that it > > identified by a uuid. Add an ABI for userspace to specify a region's > > uuid. > > > > Signed-off-by: Ben Widawsky > > [djbw: simplify locking] > > Signed-off-by: Dan Williams > > I think this needs to be a little less restrictive as it currently errors > out on trying to write the same UUID to the same region twice. > > Short cut that case and just return 0 if the UUID is same as already set. Sure, fixed that up locally.