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 52460C982DA for ; Fri, 18 Sep 2026 10:00:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A972B10E0CB; Fri, 18 Sep 2026 10:00:08 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=amd.com header.i=@amd.com header.b="VhOi6Gta"; dkim-atps=neutral Received: from CY3PR05CU001.outbound.protection.outlook.com (mail-westcentralusazon11013046.outbound.protection.outlook.com [40.93.201.46]) by gabe.freedesktop.org (Postfix) with ESMTPS id 933B310E0B8 for ; Fri, 18 Sep 2026 10:00:04 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=AqlT56Fhy/XJWVSFNz1MCvHY4ESL/XKuRdXplhEHoIJt7lE4GqzyMG3vH7rx1fUoK9kHFPZP2nKnPYjy3ZW+ck9RFCaUuHw/P5biQKG0dc79Rpe0JcmM6GhKwgWvSSst1bnO5PY6ud9Br2Qw4fBr9GssUMe2UgttKz/PW5SyXGjsoi6oSpJWqrI6F79OuqqjjeChWKrGaOFs0bowp6TuOPo4WgEJQScHntR2tNSJ+weDTGd+aYgK+z7vOcJ5CecnET6j/CYcM7SsBjp9sX9sqDpQmvmYNSFHnTI3AXgb+kYy2Eesgb5q3GkQ1q5AbnuDXk8CRzORMoiPHzDISE1qbg== 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=ZEd3Ws1ZJrISbTEwZ1itvhZz4BbQlDtfOlJ4JlqZyxE=; b=RJuSOmrYVhx4x3h0I60vPoxtxLRS2CsuPA3tUiIdEBPGwXUposSz4fbAClYRPu1u5OuwOlZhXHDtgBbHE/rjVS4wXR9TYx4aDSnxvawV4sgbfq+X8yRX3RoZt3fAOpnvEuRX6s4K5HARlF0L4EKb+dmWa1HuVM7OBHPtGm/NmsBy3LXTJnXD/OJB3J1PXMExkqlk9mFqIktyd3Df4+n4/4kwmLVBAG1XgyxUHp4wDWOIDOCDmXr7+4mTTk+QrqtPKT531M6RZs15679zIj3bB5GgbvvkQi90F7mKwp6BjtKZeZv65M3VdDnkJG3jiZRP9i5lQYMCs/PkzbYPSFlX6g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=collabora.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ZEd3Ws1ZJrISbTEwZ1itvhZz4BbQlDtfOlJ4JlqZyxE=; b=VhOi6GtaJGHh237jy7ve17Tb5Jhxiu3szxSZPSIE/SgzUbuZYKOltE8aauribZ/DPgKOBeyscjLuSXUWfnPrQGIqfTI5wHowOHQStdhfqhCQGnb3Ppar8HQ5L8/uM8kRkWU7+8EJekWKlzJwmpIEZh9Smm6NFW6bnGJD89hACno= Received: from SJ0PR05CA0089.namprd05.prod.outlook.com (2603:10b6:a03:332::34) by IA1PR12MB6282.namprd12.prod.outlook.com (2603:10b6:208:3e6::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.406.12; Fri, 18 Sep 2026 10:00:00 +0000 Received: from SJ1PEPF000037A1.namprd04.prod.outlook.com (2603:10b6:a03:332:cafe::43) by SJ0PR05CA0089.outlook.office365.com (2603:10b6:a03:332::34) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.428.7 via Frontend Transport; Fri, 18 Sep 2026 10:00:00 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SJ1PEPF000037A1.mail.protection.outlook.com (10.167.244.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.451.8 via Frontend Transport; Fri, 18 Sep 2026 10:00:00 +0000 Received: from honglei-remote.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Fri, 18 Sep 2026 04:59:56 -0500 From: Honglei Huang To: Dmitry Osipenko , Akihiko Odaki , David Airlie , "Gerd Hoffmann" CC: Gurchetan Singh , Chia-I Wu , Ray Huang , , , , Honglei Huang Subject: [PATCH v8 2/4] drm/virtgpu api: add blob userptr resource Date: Fri, 18 Sep 2026 17:59:38 +0800 Message-ID: <20260918095940.2253018-3-honghuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260918095940.2253018-1-honghuan@amd.com> References: <20260918095940.2253018-1-honghuan@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000037A1:EE_|IA1PR12MB6282:EE_ X-MS-Office365-Filtering-Correlation-Id: 57aa3307-fe97-4b21-9994-08df156b9a43 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|23010399003|82310400026|36860700016|376014|11063799006|56012099006|10067099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:satlexmb07.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(1800799024)(23010399003)(82310400026)(36860700016)(376014)(11063799006)(56012099006)(10067099003)(22082099003)(18002099003); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: kjLKxDq9jXgDJd06a9RgRLionevae9HN4nymZn2ZheXWChbuhiTZqZDBp0Rc7XPd2dqZ/yPh4vJRvgV2pPKrLyscM7M0hS/ljfMWY69WoN+Vp0JFkjXiMNtUAqawRnObdm4YdA/qA/HOhPiOTC12C+HqF2NDGE836VKz1iOAHpSyaSynxuNjEaqqRWQVl9cxgRov/5+QVEfhKRr2h4HqcTNQXp3OinNgdwCKevJr/pHqjauiHQo1SH68mq1Q/55LMRSf6QRcG8GsmCvnBXYEW0Cwk2I6tQaOYhBCPI+yRMM1phEmCx23kHS6+DRmk9TcGHFXOsMB1fqodVVZTzqr0DKuMyL1ao/vayf3E9k6os3c8RbSpTBokeD6P1J8oD25Nf2f94MRN+qs9f3IXLDNGdtg4my5ORaTnFyJRtrOPXob1ojFm9MOaJ6zZYfKIxyg X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Sep 2026 10:00:00.2444 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 57aa3307-fe97-4b21-9994-08df156b9a43 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF000037A1.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6282 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a userptr address field so userspace can request a blob backed by an existing process mapping. A non-zero userptr selects that path; probe VIRTGPU_PARAM_USERPTR before using the field. GPU-readonly backing is requested with the virtio CREATE_BLOB wire flag VIRTIO_GPU_BLOB_FLAG_USE_READONLY (also VIRTGPU_BLOB_FLAG_USE_READONLY). The device MUST NOT write such a resource. The guest pins without FOLL_WRITE only when the device advertised VIRTIO_GPU_F_BLOB_READONLY (VIRTGPU_PARAM_BLOB_READONLY). Signed-off-by: Honglei Huang --- include/uapi/drm/virtgpu_drm.h | 13 +++++++++++++ include/uapi/linux/virtio_gpu.h | 6 ++++++ 2 files changed, 19 insertions(+) diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index 95587e12ae..80f73b3276 100644 --- a/include/uapi/drm/virtgpu_drm.h +++ b/include/uapi/drm/virtgpu_drm.h @@ -99,6 +99,8 @@ struct drm_virtgpu_execbuffer { #define VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs 7 /* Bitmask of supported capability set ids */ #define VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME 8 /* Ability to set debug name from userspace */ #define VIRTGPU_PARAM_BLOB_ALIGNMENT 9 /* Device alignment requirements for blobs */ +#define VIRTGPU_PARAM_USERPTR 10 /* CREATE_BLOB userptr field is supported */ +#define VIRTGPU_PARAM_BLOB_READONLY 11 /* VIRTGPU_BLOB_FLAG_USE_READONLY is honored */ struct drm_virtgpu_getparam { __u64 param; @@ -186,6 +188,10 @@ struct drm_virtgpu_resource_create_blob { #define VIRTGPU_BLOB_FLAG_USE_MAPPABLE 0x0001 #define VIRTGPU_BLOB_FLAG_USE_SHAREABLE 0x0002 #define VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004 +/* Wire flag: device MUST NOT write. Guest pins without FOLL_WRITE. + * Rejected unless VIRTGPU_PARAM_BLOB_READONLY is 1. + */ +#define VIRTGPU_BLOB_FLAG_USE_READONLY 0x0008 /* zero is invalid blob_mem */ __u32 blob_mem; __u32 blob_flags; @@ -205,6 +211,13 @@ struct drm_virtgpu_resource_create_blob { #define DRM_VIRTGPU_BLOB_FLAG_HINT_DEFER_MAPPING 0x0001 __u32 blob_hints; __u32 pad2; + + /* + * Guest VA to pin as blob backing. Non-zero selects the userptr + * path and is valid only with VIRTGPU_BLOB_MEM_GUEST. Must be 0 + * otherwise. Probe VIRTGPU_PARAM_USERPTR before using this field. + */ + __u64 userptr; }; #define VIRTGPU_CONTEXT_PARAM_CAPSET_ID 0x0001 diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h index 3d4dfadc9d..33f5332e59 100644 --- a/include/uapi/linux/virtio_gpu.h +++ b/include/uapi/linux/virtio_gpu.h @@ -72,6 +72,10 @@ * must be aligned to that value. */ #define VIRTIO_GPU_F_BLOB_ALIGNMENT 5 +/* + * VIRTIO_GPU_BLOB_FLAG_USE_READONLY + */ +#define VIRTIO_GPU_F_BLOB_READONLY 6 enum virtio_gpu_ctrl_type { VIRTIO_GPU_UNDEFINED = 0, @@ -415,6 +419,8 @@ struct virtio_gpu_resource_create_blob { #define VIRTIO_GPU_BLOB_FLAG_USE_MAPPABLE 0x0001 #define VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE 0x0002 #define VIRTIO_GPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004 +/* Device MUST NOT write. Driver may pin read-only guest pages. */ +#define VIRTIO_GPU_BLOB_FLAG_USE_READONLY 0x0008 /* zero is invalid blob mem */ __le32 blob_mem; __le32 blob_flags; -- 2.34.1