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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS 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 B421DC47087 for ; Fri, 28 May 2021 20:03:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99A3F613EB for ; Fri, 28 May 2021 20:03:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229620AbhE1UEw (ORCPT ); Fri, 28 May 2021 16:04:52 -0400 Received: from mail-dm3nam07on2054.outbound.protection.outlook.com ([40.107.95.54]:10001 "EHLO NAM02-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229482AbhE1UEt (ORCPT ); Fri, 28 May 2021 16:04:49 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=SPpw/Oi0qjY0sOB2ATYpKyUyery9f26M9asf61zpZ2M3EE4yGg7mnlD4hhVi1Djrfl75A0EghoP9RJRwyBiqW3ApOG9QFNJS4cTdaKWBUG/oud5W+izuybIsN8e+790GVkAhm+Hx6QT7mRAZ8Iqs/JYTMoqf1fe2VrJNvhCt0rlJijjJdd6QlGZBnHKt9cjx6NtphhwIyJ8t2Bzw68XD7eYtB5lO9dKeH4FgM8PaGgA7irhajRz7zZBRieRk55QPujN73m3nenK6U19MabPeBGQSO+fdDe9OIWx49bJ2AFUiE1vAFXheblIMH3J6R7YyCpAjOtknNjpR/pzCc9Rqbw== 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-SenderADCheck; bh=gbtmhyOnbL5DT5+UgUZWKq4GLzWKrrVP/zOucFUdycc=; b=kecdQZzR9Usf66vJjo0BdFK9pfBWMcee2NFPcjd9cK+6lyVVOhwLzQki+9dwNIB3Bc0wvkMuTzuiQC3kh2Sxb7aJIUV0+rzr39WWM0DY6iuJGSjnl+sh9wcOHkXmeamVPWSyGLsWlkBzma6ySd4Y+JA9yHRqiGgSPZCWlFai8mtenxXULBrVHqLGZ4jwfzrn62lxCYpsdsSmJAOhwOKx/A4rcRgGlaQ2mfiJSrO1SZaLEeQFnliuFuV1bmGKVH7mQYR4FrXQVBLjOff1fhtFTX/7BGHjOWrQuJqxRdf9JIrvSxPg6UvvvdjkM1fV5bwjqqcxnXjQSd05N++GVrth0Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=gbtmhyOnbL5DT5+UgUZWKq4GLzWKrrVP/zOucFUdycc=; b=jiO+3Avl1gThLWDLV/Ozes9yBzIjv7q/D653KdgWJnf5ub3Wv5lOZdV1p8I0y1nmDMlhf5wkjp3TmY7Br6qe0sNQ866LBIXtCqqPdxk5EoP9mKjkIKVitzUgHm8e+nBZ/DmssQ5q01glI3h4RRG+8WVCoAw10CkT2AgG+490tRXW5BkzAYSpegohtN6CpKXqTOK8tglGwZNoGejj/ImcRPyXd9T7COqBJuERMw421LAQiceD1ifd95GZ5Avm4amPpOYE5iYthDDPFNDvwFdfbHYG9Gq2J5HfXcTC5nFiOvTxp1Q9sVhp6CRFvHRYNpPbBfgtE45TST97cxGEHJzgmg== Authentication-Results: intel.com; dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=nvidia.com; Received: from BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) by BL1PR12MB5173.namprd12.prod.outlook.com (2603:10b6:208:308::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4173.21; Fri, 28 May 2021 20:03:12 +0000 Received: from BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e]) by BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e%7]) with mapi id 15.20.4173.023; Fri, 28 May 2021 20:03:12 +0000 Date: Fri, 28 May 2021 17:03:11 -0300 From: Jason Gunthorpe To: "Tian, Kevin" Cc: LKML , Joerg Roedel , Lu Baolu , David Woodhouse , "iommu@lists.linux-foundation.org" , "kvm@vger.kernel.org" , "Alex Williamson (alex.williamson@redhat.com)" , Jason Wang , Eric Auger , Jonathan Corbet , "Raj, Ashok" , "Liu, Yi L" , "Wu, Hao" , "Jiang, Dave" , Jacob Pan , Jean-Philippe Brucker , David Gibson , Kirti Wankhede , Robin Murphy Subject: Re: [RFC] /dev/ioasid uAPI proposal Message-ID: <20210528200311.GP1002214@nvidia.com> References: Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Originating-IP: [47.55.113.94] X-ClientProxiedBy: BL0PR02CA0127.namprd02.prod.outlook.com (2603:10b6:208:35::32) To BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (47.55.113.94) by BL0PR02CA0127.namprd02.prod.outlook.com (2603:10b6:208:35::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4173.20 via Frontend Transport; Fri, 28 May 2021 20:03:12 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lmihL-00G3ty-C0; Fri, 28 May 2021 17:03:11 -0300 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 90d721bf-4603-4641-c3fc-08d922139f4e X-MS-TrafficTypeDiagnostic: BL1PR12MB5173: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4303; X-MS-Exchange-SenderADCheck: 1 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:BL0PR12MB5506.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(376002)(39860400002)(346002)(396003)(136003)(7416002)(86362001)(4326008)(83380400001)(8936002)(4744005)(33656002)(6916009)(186003)(5660300002)(9786002)(426003)(9746002)(316002)(66946007)(66556008)(66476007)(26005)(36756003)(1076003)(54906003)(2906002)(8676002)(38100700002)(478600001)(2616005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?hPRmwoQa/rNMo9AaurBrWqlBdF+TIhhb/prTgQHvLnm5aIQ7s+XkqgoZENwF?= =?us-ascii?Q?MFldTHBqQ/YOv7j8EFMFRvs9LQDaaf672J5Lgrf4tiSX7pO64nobHrCgpxVs?= =?us-ascii?Q?v/a4jm3Zpp9Ff+8VWSIUqSAU8RfpYJbBmi4kR3KC5u4WK0oVLVidU8UL/BkG?= =?us-ascii?Q?5npZZ+j2YMIcwrWARxmtyWuKMcbxoWv1IxbIHPKc8WXzxwg6q1cS90xN+Jfy?= =?us-ascii?Q?ofbbndu4nNXcdkFKinyUeArlV4nRzroEImE1jA8nK3pqfk+rkSGh3m4FIfHg?= =?us-ascii?Q?iPZ9ctoz4GEliK0TAr8dNVTabUG0s6iAZlkeQM2IxAk4OKxRLQ4PObcVBJPg?= =?us-ascii?Q?cgRNslvK/9BkgqbPTo3VRjgKHvhNPTGrPyyhZ7N+KpoQOIHfvTAj8xFdtIQq?= =?us-ascii?Q?e7rO4ymnZpDSFQ/6fWa/aT7fjPOvjyGUv5rxoFm2xdiT7c/FLOwJUV6rmCmT?= =?us-ascii?Q?BiVzcQcxKY+q7/ZS8xBbDMX9Ilk/s6fkBqwpapFcAQvDL0pivN5VwEiBtL5j?= =?us-ascii?Q?wNwlz1NmB+Cxtz5Rg9QjLbIAUx6pL0GB86sa7VVYG0FcxQRh3AEQGflnNuqJ?= =?us-ascii?Q?XasVgCky2guIPhPSO9zB6kCvkXDGYK7DdE/XU29+En8xU4XNW85Fc0sj9TUA?= =?us-ascii?Q?WuXvgpL070h43BKn+UE8jx+7jUrX66JRapYNf+GGvZqDw5Gms//xtbx1BiAx?= =?us-ascii?Q?dSLgOhFCrXBPxVQ0R+L7KBstGLCj/G5pDrhc6iaU6ayGaMrziyvwFvrWs3T3?= =?us-ascii?Q?dHwfpcJXD0FV1RRhRrBvhOJ0nYHtjD6vw8sZ54h1JveN8bk6PqjqkTK9IEJm?= =?us-ascii?Q?zsXcJka6jZ39wpjrztyx8xF14adJSm+xMrwzlQ+RnewBxgKeY0KB2vg6Ek8i?= =?us-ascii?Q?Q2aaKnoudmrnKfcQTRWElkx3XKUNsNQP/i7VG7M4LklZNnq7C2IEmaabJFec?= =?us-ascii?Q?NTMenJG6NaZONcUpw7bljPUow7qSDIlcuBCbqyhf5cUsWQiqCAEQFhrlLRUo?= =?us-ascii?Q?jrKZ5oj8ab/MPIk7K4G7pbP9wChHdGRyT/YhSfuHMvBD99TI1z+kxUHzlBPe?= =?us-ascii?Q?IXhujW2NkB046l+zxeL1xH4KgnaFB6tVmJGcGZjQXFxNkh3ZZG94KJ8zrMkW?= =?us-ascii?Q?4yvXu8sEWfEQKA0wGSyhQjieIcpgqzBVBJiQQSGN0EhqRdAdRX+qa/Y4Qjw+?= =?us-ascii?Q?Fx5X5Uk3XC2Eqy6j8E0kjPoRRG61hejrsbP70wTBcGHMzRWbjlFd1fPCk7cK?= =?us-ascii?Q?Rx2owTAKgASaZ/g/dGt4uUxD0EVnhfNAoj94iaCzs3SYzsTJIeI8hNpsT5XK?= =?us-ascii?Q?wjWhBUvsUp2NvFV0CHRmsaTL?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 90d721bf-4603-4641-c3fc-08d922139f4e X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 May 2021 20:03:12.3193 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: p66pGC01qGgOGOXlGj+JZ5L7GBDJxmU03ppFW9nfKoNxAh2nV/pegMP09tf7L6LL X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5173 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 27, 2021 at 07:58:12AM +0000, Tian, Kevin wrote: > /dev/ioasid provides an unified interface for managing I/O page tables for > devices assigned to userspace. Device passthrough frameworks (VFIO, vDPA, > etc.) are expected to use this interface instead of creating their own logic to > isolate untrusted device DMAs initiated by userspace. It is very long, but I think this has turned out quite well. It certainly matches the basic sketch I had in my head when we were talking about how to create vDPA devices a few years ago. When you get down to the operations they all seem pretty common sense and straightfoward. Create an IOASID. Connect to a device. Fill the IOASID with pages somehow. Worry about PASID labeling. It really is critical to get all the vendor IOMMU people to go over it and see how their HW features map into this. Thanks, Jason 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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_RED 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 3B940C4708D for ; Fri, 28 May 2021 20:03:19 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C4CBD613D1 for ; Fri, 28 May 2021 20:03:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4CBD613D1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 864E3608E8; Fri, 28 May 2021 20:03:18 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s5hlrIV6kMf4; Fri, 28 May 2021 20:03:17 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTP id 31A35608E7; Fri, 28 May 2021 20:03:17 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 074DEC000D; Fri, 28 May 2021 20:03:17 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 086A8C0001 for ; Fri, 28 May 2021 20:03:16 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id CBA0F4033F for ; Fri, 28 May 2021 20:03:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp2.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=nvidia.com Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9lGj76v2DMPM for ; Fri, 28 May 2021 20:03:14 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from NAM02-DM3-obe.outbound.protection.outlook.com (mail-dm3nam07on2089.outbound.protection.outlook.com [40.107.95.89]) by smtp2.osuosl.org (Postfix) with ESMTPS id 8032A400D4 for ; Fri, 28 May 2021 20:03:14 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=SPpw/Oi0qjY0sOB2ATYpKyUyery9f26M9asf61zpZ2M3EE4yGg7mnlD4hhVi1Djrfl75A0EghoP9RJRwyBiqW3ApOG9QFNJS4cTdaKWBUG/oud5W+izuybIsN8e+790GVkAhm+Hx6QT7mRAZ8Iqs/JYTMoqf1fe2VrJNvhCt0rlJijjJdd6QlGZBnHKt9cjx6NtphhwIyJ8t2Bzw68XD7eYtB5lO9dKeH4FgM8PaGgA7irhajRz7zZBRieRk55QPujN73m3nenK6U19MabPeBGQSO+fdDe9OIWx49bJ2AFUiE1vAFXheblIMH3J6R7YyCpAjOtknNjpR/pzCc9Rqbw== 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-SenderADCheck; bh=gbtmhyOnbL5DT5+UgUZWKq4GLzWKrrVP/zOucFUdycc=; b=kecdQZzR9Usf66vJjo0BdFK9pfBWMcee2NFPcjd9cK+6lyVVOhwLzQki+9dwNIB3Bc0wvkMuTzuiQC3kh2Sxb7aJIUV0+rzr39WWM0DY6iuJGSjnl+sh9wcOHkXmeamVPWSyGLsWlkBzma6ySd4Y+JA9yHRqiGgSPZCWlFai8mtenxXULBrVHqLGZ4jwfzrn62lxCYpsdsSmJAOhwOKx/A4rcRgGlaQ2mfiJSrO1SZaLEeQFnliuFuV1bmGKVH7mQYR4FrXQVBLjOff1fhtFTX/7BGHjOWrQuJqxRdf9JIrvSxPg6UvvvdjkM1fV5bwjqqcxnXjQSd05N++GVrth0Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=gbtmhyOnbL5DT5+UgUZWKq4GLzWKrrVP/zOucFUdycc=; b=jiO+3Avl1gThLWDLV/Ozes9yBzIjv7q/D653KdgWJnf5ub3Wv5lOZdV1p8I0y1nmDMlhf5wkjp3TmY7Br6qe0sNQ866LBIXtCqqPdxk5EoP9mKjkIKVitzUgHm8e+nBZ/DmssQ5q01glI3h4RRG+8WVCoAw10CkT2AgG+490tRXW5BkzAYSpegohtN6CpKXqTOK8tglGwZNoGejj/ImcRPyXd9T7COqBJuERMw421LAQiceD1ifd95GZ5Avm4amPpOYE5iYthDDPFNDvwFdfbHYG9Gq2J5HfXcTC5nFiOvTxp1Q9sVhp6CRFvHRYNpPbBfgtE45TST97cxGEHJzgmg== Authentication-Results: intel.com; dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=nvidia.com; Received: from BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) by BL1PR12MB5173.namprd12.prod.outlook.com (2603:10b6:208:308::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4173.21; Fri, 28 May 2021 20:03:12 +0000 Received: from BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e]) by BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e%7]) with mapi id 15.20.4173.023; Fri, 28 May 2021 20:03:12 +0000 Date: Fri, 28 May 2021 17:03:11 -0300 From: Jason Gunthorpe To: "Tian, Kevin" Subject: Re: [RFC] /dev/ioasid uAPI proposal Message-ID: <20210528200311.GP1002214@nvidia.com> References: Content-Disposition: inline In-Reply-To: X-Originating-IP: [47.55.113.94] X-ClientProxiedBy: BL0PR02CA0127.namprd02.prod.outlook.com (2603:10b6:208:35::32) To BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (47.55.113.94) by BL0PR02CA0127.namprd02.prod.outlook.com (2603:10b6:208:35::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4173.20 via Frontend Transport; Fri, 28 May 2021 20:03:12 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lmihL-00G3ty-C0; Fri, 28 May 2021 17:03:11 -0300 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 90d721bf-4603-4641-c3fc-08d922139f4e X-MS-TrafficTypeDiagnostic: BL1PR12MB5173: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4303; X-MS-Exchange-SenderADCheck: 1 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:BL0PR12MB5506.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(366004)(376002)(39860400002)(346002)(396003)(136003)(7416002)(86362001)(4326008)(83380400001)(8936002)(4744005)(33656002)(6916009)(186003)(5660300002)(9786002)(426003)(9746002)(316002)(66946007)(66556008)(66476007)(26005)(36756003)(1076003)(54906003)(2906002)(8676002)(38100700002)(478600001)(2616005); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?hPRmwoQa/rNMo9AaurBrWqlBdF+TIhhb/prTgQHvLnm5aIQ7s+XkqgoZENwF?= =?us-ascii?Q?MFldTHBqQ/YOv7j8EFMFRvs9LQDaaf672J5Lgrf4tiSX7pO64nobHrCgpxVs?= =?us-ascii?Q?v/a4jm3Zpp9Ff+8VWSIUqSAU8RfpYJbBmi4kR3KC5u4WK0oVLVidU8UL/BkG?= =?us-ascii?Q?5npZZ+j2YMIcwrWARxmtyWuKMcbxoWv1IxbIHPKc8WXzxwg6q1cS90xN+Jfy?= =?us-ascii?Q?ofbbndu4nNXcdkFKinyUeArlV4nRzroEImE1jA8nK3pqfk+rkSGh3m4FIfHg?= =?us-ascii?Q?iPZ9ctoz4GEliK0TAr8dNVTabUG0s6iAZlkeQM2IxAk4OKxRLQ4PObcVBJPg?= =?us-ascii?Q?cgRNslvK/9BkgqbPTo3VRjgKHvhNPTGrPyyhZ7N+KpoQOIHfvTAj8xFdtIQq?= =?us-ascii?Q?e7rO4ymnZpDSFQ/6fWa/aT7fjPOvjyGUv5rxoFm2xdiT7c/FLOwJUV6rmCmT?= =?us-ascii?Q?BiVzcQcxKY+q7/ZS8xBbDMX9Ilk/s6fkBqwpapFcAQvDL0pivN5VwEiBtL5j?= =?us-ascii?Q?wNwlz1NmB+Cxtz5Rg9QjLbIAUx6pL0GB86sa7VVYG0FcxQRh3AEQGflnNuqJ?= =?us-ascii?Q?XasVgCky2guIPhPSO9zB6kCvkXDGYK7DdE/XU29+En8xU4XNW85Fc0sj9TUA?= =?us-ascii?Q?WuXvgpL070h43BKn+UE8jx+7jUrX66JRapYNf+GGvZqDw5Gms//xtbx1BiAx?= =?us-ascii?Q?dSLgOhFCrXBPxVQ0R+L7KBstGLCj/G5pDrhc6iaU6ayGaMrziyvwFvrWs3T3?= =?us-ascii?Q?dHwfpcJXD0FV1RRhRrBvhOJ0nYHtjD6vw8sZ54h1JveN8bk6PqjqkTK9IEJm?= =?us-ascii?Q?zsXcJka6jZ39wpjrztyx8xF14adJSm+xMrwzlQ+RnewBxgKeY0KB2vg6Ek8i?= =?us-ascii?Q?Q2aaKnoudmrnKfcQTRWElkx3XKUNsNQP/i7VG7M4LklZNnq7C2IEmaabJFec?= =?us-ascii?Q?NTMenJG6NaZONcUpw7bljPUow7qSDIlcuBCbqyhf5cUsWQiqCAEQFhrlLRUo?= =?us-ascii?Q?jrKZ5oj8ab/MPIk7K4G7pbP9wChHdGRyT/YhSfuHMvBD99TI1z+kxUHzlBPe?= =?us-ascii?Q?IXhujW2NkB046l+zxeL1xH4KgnaFB6tVmJGcGZjQXFxNkh3ZZG94KJ8zrMkW?= =?us-ascii?Q?4yvXu8sEWfEQKA0wGSyhQjieIcpgqzBVBJiQQSGN0EhqRdAdRX+qa/Y4Qjw+?= =?us-ascii?Q?Fx5X5Uk3XC2Eqy6j8E0kjPoRRG61hejrsbP70wTBcGHMzRWbjlFd1fPCk7cK?= =?us-ascii?Q?Rx2owTAKgASaZ/g/dGt4uUxD0EVnhfNAoj94iaCzs3SYzsTJIeI8hNpsT5XK?= =?us-ascii?Q?wjWhBUvsUp2NvFV0CHRmsaTL?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 90d721bf-4603-4641-c3fc-08d922139f4e X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 May 2021 20:03:12.3193 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: p66pGC01qGgOGOXlGj+JZ5L7GBDJxmU03ppFW9nfKoNxAh2nV/pegMP09tf7L6LL X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5173 Cc: Jean-Philippe Brucker , "Alex Williamson \(alex.williamson@redhat.com\)" , "Raj, Ashok" , "kvm@vger.kernel.org" , Jonathan Corbet , Robin Murphy , LKML , Kirti Wankhede , "iommu@lists.linux-foundation.org" , David Gibson , "Jiang, Dave" , "Wu, Hao" , David Woodhouse , Jason Wang X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, May 27, 2021 at 07:58:12AM +0000, Tian, Kevin wrote: > /dev/ioasid provides an unified interface for managing I/O page tables for > devices assigned to userspace. Device passthrough frameworks (VFIO, vDPA, > etc.) are expected to use this interface instead of creating their own logic to > isolate untrusted device DMAs initiated by userspace. It is very long, but I think this has turned out quite well. It certainly matches the basic sketch I had in my head when we were talking about how to create vDPA devices a few years ago. When you get down to the operations they all seem pretty common sense and straightfoward. Create an IOASID. Connect to a device. Fill the IOASID with pages somehow. Worry about PASID labeling. It really is critical to get all the vendor IOMMU people to go over it and see how their HW features map into this. Thanks, Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu