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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4BA88D10389 for ; Wed, 26 Nov 2025 07:44:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EF8C710E525; Wed, 26 Nov 2025 07:44:42 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.b="BMbV1+tG"; dkim-atps=neutral Received: from CH1PR05CU001.outbound.protection.outlook.com (mail-northcentralusazon11010009.outbound.protection.outlook.com [52.101.193.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id BC6F210E525; Wed, 26 Nov 2025 07:44:41 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ypm7G48Cl4QsHoQN+SLlEYvpWgEc+VjPyUzk1t6rs53BUFiJRYgeqKN8jAsuG+zqkG2+m8jGIYHh/HlmnjLle8um1EKKwIqbaXsv7q+D1S7gUuOCmry8Fah17R4WdHWpf6X6kyZybuPsAvgj9//z5TD1DYBVQozrxebLKCJGx9ALeGVmdHQPfnetFH1+wGoYWQKj0LeO3YhGi8lRUorNr9vtUgeCjirZy4P7hahPA+7A93UeQA1EAhXFjGOlXvZcQ8DF3plgna2P0rM0DxIW3/Ehd4B4xCqRkMvzVkuh9ft4o4EiVYoofRkBLCvAyWLqZCzzxEg3r5/PvzukN1cVBw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=nXq6bhZ0Xid/rCnSLbRAL7kcagIT3OeYWWdNIk3An9Y=; b=koKDMQgsMZ/Zx7YZmF/S0KIt5+e8qZLfPKgkzgTJDnredeIucPnVt74W4dGzfX28C4Oxr9x1lSyZ/k5N6xVsEkiQelE2S+HPka8DFhecIN2V1UWE1OwAYwDFc6DPztHSKtfc0AIaPC6pui0WSm+Mp/rfB3fybFCw8eTbsSuihYqEVEGZDjCAg+/pZtoTV90O3yj5CfziqnMUfkJRUpKIw0CX8BCSoWXhQrARDapITNIP9OWCN+HkvSMMfrZ7b2S00IEdXp7qNo7W7h9eDtIdAEZnNwLtdz+43di+tywBOuA0tYqDTs/OKbFiF/26pMWE1+lyyy2oDAoR4REcACtPVQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.232) smtp.rcpttodomain=gmail.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) 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=nXq6bhZ0Xid/rCnSLbRAL7kcagIT3OeYWWdNIk3An9Y=; b=BMbV1+tGWVgXis9uVWlTwu0JCiqpVx0D1LgzFFR1mdCrToi7iFc6+ekHbIND9SIMDtV3l3SJx/OBOesG/RHEWNM3w40l9Si5UTUB1wbF/6Nu2liiTHunPmdN84WWgfvZMaITEbhnIzKhyXM5WwQpuXLIfQxvkE7YPbePgqIvkffNDoYRO+dl/MEk9WiVT0hAnszc4/laXMEvIr96l2vEB0uNiF/vFAOHj18TEB92d4w/LFvi5OcYl9+0Ov5JDdXdbDNFSICZOIB6S1n1xskNRACDCoublSYnl52TIQYGU/SHTBaPEKhJLOG23D3lQ5VDzwxjaobniyIPzX5iPsPQmA== Received: from DS7PR06CA0003.namprd06.prod.outlook.com (2603:10b6:8:2a::27) by DS5PPF7B9F1F8E0.namprd12.prod.outlook.com (2603:10b6:f:fc00::656) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9343.17; Wed, 26 Nov 2025 07:44:35 +0000 Received: from CY4PEPF0000E9CF.namprd03.prod.outlook.com (2603:10b6:8:2a:cafe::ea) by DS7PR06CA0003.outlook.office365.com (2603:10b6:8:2a::27) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9366.12 via Frontend Transport; Wed, 26 Nov 2025 07:44:33 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.118.232) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.118.232 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.232; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.232) by CY4PEPF0000E9CF.mail.protection.outlook.com (10.167.241.134) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9366.7 via Frontend Transport; Wed, 26 Nov 2025 07:44:35 +0000 Received: from drhqmail201.nvidia.com (10.126.190.180) by mail.nvidia.com (10.127.129.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 25 Nov 2025 23:44:23 -0800 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail201.nvidia.com (10.126.190.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 25 Nov 2025 23:44:23 -0800 Received: from inno-thin-client (10.127.8.10) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.2562.20 via Frontend Transport; Tue, 25 Nov 2025 23:44:13 -0800 Date: Wed, 26 Nov 2025 09:44:12 +0200 From: Zhi Wang To: Dave Airlie CC: Christian =?UTF-8?B?S8O2bmln?= , John Hubbard , Joel Fernandes , , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Simona Vetter , Jonathan Corbet , Alex Deucher , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Huang Rui , "Matthew Auld" , Matthew Brost , "Lucas De Marchi" , Thomas =?UTF-8?B?SGVsbHN0csO2bQ==?= , Helge Deller , "Danilo Krummrich" , Alice Ryhl , "Miguel Ojeda" , Alex Gaynor , Boqun Feng , Gary Guo , "=?UTF-8?B?QmrDtnJu?= Roy Baron" , Benno Lossin , "Andreas Hindborg" , Trevor Gross , "Alistair Popple" , Timur Tabi , Edwin Peer , Alexandre Courbot , , , , , , , , Subject: Re: [PATCH] gpu: Move DRM buddy allocator one level up Message-ID: <20251126094412.23373c13.zhiw@nvidia.com> In-Reply-To: References: <20251124234432.1988476-1-joelagnelf@nvidia.com> <24d4f02b-8ecd-4512-a1f0-ba41684ede1d@amd.com> <9f433dee-7ad9-4d0f-8ac1-e67deb409b70@amd.com> Organization: NVIDIA X-Mailer: Claws Mail 4.3.1 (GTK 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9CF:EE_|DS5PPF7B9F1F8E0:EE_ X-MS-Office365-Filtering-Correlation-Id: 2c6c02fc-8e2f-41b2-4121-08de2cbfa528 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|7416014|376014|1800799024|36860700013|82310400026|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?OXh5STFveDNFUHR5YktkaktwRU1RRndTV2ZSQmZCbW1mTk13V2xDMW5rV241?= =?utf-8?B?dzdnbEV6MXc3ekROQ2Uva2wwbEJnZ2xnemtPeFdHamdHOFQ0S3RzU2VvUncv?= =?utf-8?B?RmtZb0dybE11VWR0TFQxQkhIcmxWZytUT2FiZHV5Y3BieVVwME9reTM2YVI1?= =?utf-8?B?bTFLS3Ezd1FBYXNKOTU0enNieVkxS0p1VHZid29mZm9WaUs5MXlnRDNodDhF?= =?utf-8?B?RDR6Z0ljZmY5eUNuc2dvQUg5M0c1N2w3blJ0cXFjb1BhcGFDM0V0V1h0TjRE?= =?utf-8?B?SkNjT3VKbWhkeW9tL3hicm1jQysyUU1xQkFRRzhKckFtMUw4Q0hmU21hbkNw?= =?utf-8?B?cEV5aHBPWTJmS0RJdEpicnVBM054T3dnNFlpM2JEYytKM1F0aE1qczNpQUxC?= =?utf-8?B?eVlOdkkyM0J3Y2lmdVdtSUJRd1FjQmFFdzJtSDhqK0NYeklCYzhMR0pNQVJL?= =?utf-8?B?cUZ5VWVoVXBDZHNVSVRoVU5HTHhmVFhpQlF0dVJ6bU5yQkVVeDcxdVNxbEpy?= =?utf-8?B?ckJoaFdQMmJZV0hkWnBjbGE1VWduUk9KUXc0ZFY3LzVrcEtsa0hMOEVrZCtC?= =?utf-8?B?UDR3TXlTTjQyNW5ZNnV6VXNnT0VnWHpUemYrNWNwVGZVNHcwUzlGbkhGak11?= =?utf-8?B?bnM0TXpZdlA0cm1UMVB4Qjd1NWhQQW01MmlpRkNFdG9tUFNUQ0I5S0FjRkFE?= =?utf-8?B?SGtVQWViZlVBQlhQVUM3WisyM3Y2WVNzNHlqS05nbks4RU9Ya1RNMnFOU1RD?= =?utf-8?B?NGpnMFpoN1gybWVSUG0yMXZBVlcxdE9DSWZrZGJDWU5pck5sUlZnRDlZeWl5?= =?utf-8?B?QzFyY2hiUUhSc3BsdFYvdSsweW04eW1leWt5L2Nod0Y4c2luR293YlFLdWpx?= =?utf-8?B?MGF2dHNUU3dWQkxKM1BaT1UzZ1dvOXpBRUVPc3p5ZWlWZ3ZOK0dOalR2S1ZO?= =?utf-8?B?V21WMmJVanNiTkFaNW9EVmNUYks0QnBISTZkSjN5V1VVamVkOHA3WUR0Q3NZ?= =?utf-8?B?ODVrNUJyTzE3d0V1R1MzYVE1eFpZUWhJNFl6S0M1Ri9ubWZsZDVuZDNUaGFv?= =?utf-8?B?TmZCN2lUQjNVa0tBNjN6Zk8wNGJIWDA4K25yMjRZV2VuMDRWdC9QRk5SZ2U2?= =?utf-8?B?dENtRWNhSFNOUGQ0RzhHSE1wOG5udUVTbHA3YmZBNzBFMitOZEsvbW9JNnFw?= =?utf-8?B?VzNjM1VTSDBBajJsZW9lWUlyN1lMaDBzRTFaVlhYelQwdGRPY1p3VjZvS0U4?= =?utf-8?B?N2lUTk90bW51Wm9YeUFJaEtrak1ycmZWQ01XNU9LVGo2amFWZll0bDJMODhp?= =?utf-8?B?bEorYmNxcFczRjhVd1REd204eXA0eWd4VFZzcHc5bm4xMVpOUUUzQlZPYTVk?= =?utf-8?B?MmNKR0xKSDNScXVHWXVFdTZsbzhHRFZOVDE3QjFBdFpHeVpRODNJZUFXM0g2?= =?utf-8?B?R0FReU9MQndUNGF0TllUWFFtMmdiazJwWCtTNHcvNWN5cm5SZDlGWkRwRHE0?= =?utf-8?B?eGZmU3VISWJBc1YyNmtGd2dJYW5TUXdld3JsR1JkSEk4d3BkUWU1Y0lFRHlE?= =?utf-8?B?QWpxU0dzeUtpWmlGcmd3WW9lbGtaTE1aL3lPU0Ivdmp6WGJ1MllIYlhxWmlm?= =?utf-8?B?MExNQS9SdHNyQ0FYVXVFblZ1YWpzOXZaM3hVRDMrbWJxRDB6eUt3cS9kTmI4?= =?utf-8?B?cjd6MldheFIxMW92VllRbGxZVUtQS2x1ZDAyN0FMcm1tNk9TUWdwTk4rT1dy?= =?utf-8?B?cXBnbEpsSk1HY1psN3I0VEtmbzl2NGRlUmdUSHdPZEJYUHRYUFZrNzFpeFFH?= =?utf-8?B?eWswVE04V2dZTTUvOHFKNjdhcXN6dmFweWRROUtYVEZNNFI1ZHpQNThxL3cr?= =?utf-8?B?TkNJNVhKbXVYY1BIYlV2cThTenBmTjU4SURnYjZKbHdQTFViakRPNlJ5NW9B?= =?utf-8?B?MmZUUlpYT2U1MHl1cXVxaktxbDFLMlN4OUZIanRHU0pkS0s5ejVmNFNqZTUv?= =?utf-8?B?OE4veEc5NzlYcUZ3QWxOQWJiVnBUSGYvU0tqV1VrUVNEd2pCQXRQa1ZMTmNX?= =?utf-8?B?b1Vvb0FWRzVQTS85anMxNVNWY1FJdlUzWmcvenBzTlZadEJ6Tk9pTTJyZnBq?= =?utf-8?Q?19Jk=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(7416014)(376014)(1800799024)(36860700013)(82310400026)(7053199007); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Nov 2025 07:44:35.3778 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2c6c02fc-8e2f-41b2-4121-08de2cbfa528 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9CF.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS5PPF7B9F1F8E0 X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Wed, 26 Nov 2025 06:17:25 +1000 Dave Airlie wrote: > On Tue, 25 Nov 2025 at 19:15, Christian K=C3=B6nig > wrote: > > > > On 11/25/25 10:08, Dave Airlie wrote: snip > So far I haven't heard anything about needing dma-buf interactions at > that level, and maybe Zhi has more insight into the future there. >=20 For VFIO parts, the vendor VFIO driver relies on the core driver's support to export the VM's framebuffer to the userspace either as type a) VFIO_GFX_PLANE_TYPE_REGION, framebuffer as a region or b) VFIO_GFX_PLANE_TYPE_DMABUF, framebuffer as a dmabuf, which is usually backed by a GEM object. NVIDIA vGPU uses VFIO_GFX_PLANE_TYPE_REGION, so dma-buf interactions are not required. > Dave.