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 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 D8778C47097 for ; Thu, 3 Jun 2021 12:49:38 +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 9AE33613F4 for ; Thu, 3 Jun 2021 12:49:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9AE33613F4 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 7982C6081D; Thu, 3 Jun 2021 12:49:38 +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 fFDP2Nkb2Uhq; Thu, 3 Jun 2021 12:49:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTP id 51D3E60679; Thu, 3 Jun 2021 12:49:34 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D8ABCC0025; Thu, 3 Jun 2021 12:49:33 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 85130C0001 for ; Thu, 3 Jun 2021 12:49:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 7417E607F9 for ; Thu, 3 Jun 2021 12:49:32 +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 8Qce7LzeqPQ1 for ; Thu, 3 Jun 2021 12:49:28 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2061d.outbound.protection.outlook.com [IPv6:2a01:111:f400:7eab::61d]) by smtp3.osuosl.org (Postfix) with ESMTPS id 28E1660679 for ; Thu, 3 Jun 2021 12:49:28 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=n5HHb4edAGYN8hZT5iiIEbCzRtOoeRg4rBtLrOxqkAqgJiKNYSX/Xv4OOLfTH7GM23OZLJzUrBhSrhG6b+ZNxrRR5lABrEr8U+krbHDQCd0yA6WvTLsn5E7QUdftsvI1rU+3ELAPO0xJcQ0MF7rAKLQtsO3IktxJB7s/8NmsJBCR5fM7Tu7i7Is4Ts8+O+1YD0EWZH/PO/R1Vb1VEW+p9aqxEZz9ZP6wXBjopep3LVtB6wdoygB55qovJHon3fN/gkOYGHSi9mMtVH94d1/S6x+AVZnkNjqJ11f7d1ARAQpUfxjKFCJJSihq7ryNuDTw1YMD40yzNcALZUfkZ0IYcg== 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=Zifp6LGBMcahPPa1/hfQc+nZIll8c0K6BEy0x3TQ0dg=; b=bg+EISICkZx4i6o6QC3b2YWdkzxFzHnEle9WvMSldNPq2/fBigaVuf5Ho4Unn6ly58nHB9eSANY+swa1v0akYadI1hNvjpn7zvCwHDU3A+cbbD4vkYri1bXAJGbvFddQXo4psqaYmfOQcKNCD6iKbhX2jjxMJvH6zPUEqX67KdgMXlBMmO25GAJmjy9hyMl6FphlzNoHvSdfei616jucnP6jKTE/iY9fvorhLdPet+q/onPICNHKzPPWMhq1AMzN58cRJdgzuqrHVxbbkzgXIDgWCvRBUSg2zJKMpSG3M6J45af8OyzEEIt8B9glGTn0+hboUyS9HI3sk/RfCy+F7Q== 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=Zifp6LGBMcahPPa1/hfQc+nZIll8c0K6BEy0x3TQ0dg=; b=eOfTLePvhwunsxPBiy1hspGckjWsVMCG0RJy+sT08SKoK24OZhTMWaBWk+lPwVc8YZZDRluy2OJBx2A0ZMahiY4bW0nI7Z6juhHlEkfY+WtJQlHNT/ip/zF8sBsR+sxyMe37cDuMGv3esk/dI2tBEPCpOsOIu/0slOJcD4qlnDSl9QBZcXI79Beg0UDAWdPy6SvVsr6BJ9Io3qL/cegl17QvdghVYu8QfHLt3Al9JMd9d6SvmHniMZGrA9PSg99nvB3bA1eKYCedQ9sxAFNxXH1iytgAvo1yzgENmozxd5Mayye3ySjHy0Q+MXI4gA/3Oxmadpldla0gJ7IO6kzIhA== 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 BL0PR12MB5521.namprd12.prod.outlook.com (2603:10b6:208:1c7::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.23; Thu, 3 Jun 2021 12:49:25 +0000 Received: from BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e]) by BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::3d51:a3b9:8611:684e%6]) with mapi id 15.20.4195.024; Thu, 3 Jun 2021 12:49:25 +0000 Date: Thu, 3 Jun 2021 09:49:23 -0300 From: Jason Gunthorpe To: "Tian, Kevin" Subject: Re: [RFC] /dev/ioasid uAPI proposal Message-ID: <20210603124923.GW1002214@nvidia.com> References: Content-Disposition: inline In-Reply-To: X-Originating-IP: [47.55.113.94] X-ClientProxiedBy: BL0PR02CA0045.namprd02.prod.outlook.com (2603:10b6:207:3d::22) 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 BL0PR02CA0045.namprd02.prod.outlook.com (2603:10b6:207:3d::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.15 via Frontend Transport; Thu, 3 Jun 2021 12:49:24 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lommp-001534-Gv; Thu, 03 Jun 2021 09:49:23 -0300 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d936492c-efa5-43cc-6250-08d9268e0446 X-MS-TrafficTypeDiagnostic: BL0PR12MB5521: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7219; 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)(396003)(136003)(346002)(39860400002)(376002)(366004)(1076003)(54906003)(316002)(7416002)(9746002)(9786002)(6916009)(8936002)(2906002)(8676002)(86362001)(36756003)(5660300002)(26005)(426003)(2616005)(38100700002)(66476007)(66946007)(33656002)(478600001)(66556008)(186003)(4326008); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?NeXT+MO5lRSio/byZYGwc7jgC9OykFWmYgRPXBi2w5W74Fu2+unOwb05nIef?= =?us-ascii?Q?lYW6MwUDDB2p8Jp258PSluY0xIEk/r9/+xq1VLNxatkTWnkF5mF6t7Ol4Yvs?= =?us-ascii?Q?wcj/ysUnJdkYr9Mcx0wD6AjykNQeD7aZtCD7mcxU6eepzbiVZQzFMLdI1Igl?= =?us-ascii?Q?slL7FdSgVV0GTlkXzvoW68d2TXJ50NXhQkQ5vRt9pJ7VpEOBuHrt3R61DLRa?= =?us-ascii?Q?tSOjsoDGciBVKDwOtSjhW3BbKGZ0SO3NMNtL1DDXorAAYt7iNYXO+V9yF5ZA?= =?us-ascii?Q?mr7YpuJ+lDE6+owK7n/izt4MAnKzEbNECZMISFxdEKZpCglGbJfe7ExlLoG7?= =?us-ascii?Q?no7iG6IZ8LvbRG7mniU1SNR/zADfKMZkpbg0r4RhWIkfUer7sC61V+yBt9eM?= =?us-ascii?Q?OdAgusjZyf14M0xGlV2Dk2W3lH8L2YT66W+Bi4Ms2ZFNW4vWDG+uHbqB+lDv?= =?us-ascii?Q?bkLjNYEJKjs5t486p09UxrkPurQpbYsZWiRqylIL+Nki+uO8N0EcuiJh83mg?= =?us-ascii?Q?lvPhmD569O01yLjoT8MbHWL7KvvEdUnFWwuP1Alih0Q/Z/IMIjNXcDZlSt9u?= =?us-ascii?Q?HVBRdJGYpgQ8ZFi4/UKbFIfBgYBkjhFaxW9pQ9z95M2v4S4XQoWp9C4RlRxT?= =?us-ascii?Q?T+PpehIMzaG/F3wqJgSiZCk2pyxB5JpqCn/mMJxNVlywL5dpcayuRNde1nn3?= =?us-ascii?Q?c55C5t8oWGrXOzO9bLDDEQWGdUTpjFlvwnn5LjjAlQKIxlk1tucrCkwEh/to?= =?us-ascii?Q?waeM/cDLdJ4pHjHK/tiHTMaLvFcus5g603HjnyBDGAuFYmUCBx9T282Qb3Jv?= =?us-ascii?Q?YdwJbyRzPe2/zc4b+b6lCzMU4Y/vH7IPwO+J+fNIFcZ7zEr5lFrHp9xbTpl9?= =?us-ascii?Q?kOB8auFyTCN5iWULfXhbMYhAGfzSGOm3Y4groefzzt5NMxdTzmKOR9w1RF2r?= =?us-ascii?Q?LH/zP9d/GxbwvQ5bpwbS7gyLnj7oQKSjVzE6fT/e9MIs4m2oCfB3MZ8aZ6aY?= =?us-ascii?Q?B3jA8EZLGO3DZg6EBaZlrcy8heD3YxGr+PMMEbHj13rgpOsT1UJqhYalIiqG?= =?us-ascii?Q?vjqmpwrn1wmOPdFcV6UlCdpS7FnCVV3+0LdnjLNxqd+f0HsJw/gxHq85Cjlq?= =?us-ascii?Q?RttvY/nmim1yNtW1g5JNSV8bArRRGveev3mx1xBqgmnC3MBZrryC5BXBieTY?= =?us-ascii?Q?tYUSmja6xTxiL3M5StVFRQVkpd0nMGGOuI0asitGMn5bA8DBgnSF5KPdC4EA?= =?us-ascii?Q?wmHhhxztlkJLpW431eYGgrEwq2q22HVYFywWxRpUTC9ynjHtQzpdI9rwonRp?= =?us-ascii?Q?Av9m8CUMF3MWZeyBjeeHA+3K?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: d936492c-efa5-43cc-6250-08d9268e0446 X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2021 12:49:25.0351 (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: 9eyye7yD39Q/gehwOZuTI1CvalSvseCzzA/B6dZk0y2q8nq3W1NkUbd1jBtITeuy X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB5521 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" , "Jiang, Dave" , David Gibson , 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, Jun 03, 2021 at 07:17:23AM +0000, Tian, Kevin wrote: > > From: David Gibson > > Sent: Wednesday, June 2, 2021 2:15 PM > > > [...] > > > An I/O address space takes effect in the IOMMU only after it is attached > > > to a device. The device in the /dev/ioasid context always refers to a > > > physical one or 'pdev' (PF or VF). > > > > What you mean by "physical" device here isn't really clear - VFs > > aren't really physical devices, and the PF/VF terminology also doesn't > > extent to non-PCI devices (which I think we want to consider for the > > API, even if we're not implemenenting it any time soon). > > Yes, it's not very clear, and more in PCI context to simplify the > description. A "physical" one here means an PCI endpoint function > which has a unique RID. It's more to differentiate with later mdev/ > subdevice which uses both RID+PASID. Naming is always a hard > exercise to me... Possibly I'll just use device vs. subdevice in future > versions. Using PCI words: A "physical" device is RID matching. A "subdevice" is (RID, PASID) matching. A "SW mdev" is performing DMA isolation in a device specific way - all DMA's from the device are routed to the hypervisor's IOMMU page tables. Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu