From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=pass header.oldest-pass=0 smtp.remote-ip=52.101.57.45 ARC-Seal: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=pass; t=1793953617; b=oLtOwziI/6sEVsc9vc9IqfHSr4j/zloWRF6PfRMaHC9LNqgFZlrgCnhOGO9FO2CO1Cl3 CRzF9l6k50IjfyddVCCxgrHmnIiffDqzZXGeOyBgLiQSZKjBtnToUm3pSI39PjJiUx/C5 QPY72hgKaYXcKsQIaO0i5biYOfq1zOT50M3cvkEBD4JuAAvVjXYG0pM5+uQ6qOnEjEuV0 T7mJaMsGDVRUMGbDwRqVFHM0/Sj/AFzfVAScL2NH9QEFACZxmw77RsKNMOJQfmz84kKWF t3/X+5MTP2kfw3Ic90HMTjkzXVcoArPIzCSyttwsv0LrfO/Lhc8CwsstJovrE1CtLiQ== ARC-Message-Signature: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793953617; h=DMARC-Filter:DKIM-Signature:Received:Received: X-MS-Exchange-Authentication-Results:Received-SPF:Received:Received: From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:Content-Type:X-Originating-IP: X-ClientProxiedBy:X-EOPAttributedMessage:X-MS-PublicTrafficType: X-MS-TrafficTypeDiagnostic:X-MS-Office365-Filtering-Correlation-Id: X-MS-Exchange-SenderADCheck:X-MS-Exchange-AntiSpam-Relay: X-Microsoft-Antispam:X-Microsoft-Antispam-Message-Info: X-Forefront-Antispam-Report: X-MS-Exchange-AntiSpam-MessageData-ChunkCount: X-MS-Exchange-AntiSpam-MessageData-0:X-OriginatorOrg: X-MS-Exchange-CrossTenant-OriginalArrivalTime: X-MS-Exchange-CrossTenant-Network-Message-Id: X-MS-Exchange-CrossTenant-Id: X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: X-MS-Exchange-CrossTenant-AuthSource:X-MS-Exchange-CrossTenant-AuthAs: X-MS-Exchange-CrossTenant-FromEntityHeader: X-MS-Exchange-Transport-CrossTenantHeadersStamped; bh=YDPnASpYJelJWNYK7ontFRtDPpi+l0vK475gROAW84A=; b=49Mf/3Q63DYXQrARSsid77ZjnQLDZRvYccad9X/mGE3OR96qDEJ2x1+SEIfMkf4kcbIW syfdedPRI9RkLrwDprB1vth57ED+IdEL71IJKVgq8/LrnZwLDt0Pi1YXZr1TCmILTAmxY eUgJt+oY1Z4JvxtQFxd+AMeN8q1Qz1xALnDfctK7LyS4XnPY86vPb54QROKRaL42wAADT Wwu7p0I8Nrh4zjSdVUAf965Z3ccf+o0k5R1IpOOrstlbweZkKdhDnk5p8JHKSK9wi5Kbs zHUAonr7AhyKmdZRa3Lo4KuQ8yttNlEuy/fwN02WwZ8qEFijwsTKgjB8Wx9uWcprIkg== ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass header.d=amd.com header.i=@amd.com header.a=rsa-sha256 header.s=selector1 header.b=eLNpPW51; arc=pass header.oldest-pass=0 smtp.remote-ip=52.101.57.45 Received: from BN8PR05CU002.outbound.protection.outlook.com (mail-eastus2azon11011045.outbound.protection.outlook.com [52.101.57.45]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (secp384r1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93FF5606D801 for ; Fri, 6 Nov 2026 08:26:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 93FF5606D801 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=amd.com header.i=@amd.com header.a=rsa-sha256 header.s=selector1 header.b=eLNpPW51 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=dUmkPfSS5/fS/5RfjeDf37Glk6vCIEWVD+gauIVO+O+EUMrjsEFaDJIHh+F/QCK3KnK481Q4vgnJGdeDbCx/R1PEt/fv18iUHaxogpDYfCvnowcCJsY6VlhJWS4V2LTnyUY2HgTsrDEcoYVS214qpYOXtFP69zX23mpPfcbsROSecMpIVZTxhSG9+zhiHl8hKrYfaNGp/+znm2yTUxfRfagShhOotiKW3n7QdRk4X4zAARyDz/ehsoDtW1oSfXO6QpuxQ9JIdXk+V1oe2B78XNQM1BT1t4oXcLlKBP9KmlkZdMzBObzA4U3cUimSDeNIVEiMiP/HtjyrB9oix45T0Q== 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=YDPnASpYJelJWNYK7ontFRtDPpi+l0vK475gROAW84A=; b=IxIpSKCoGi233wVd2AYT6ROMmbe/iPq0IR0DkVSwJz5/uKlcRTkoV8wYwJLCWvO/P1vfJOiIwmtAZ6DIaBq7eH/jleN86EDAeGVnZnOeFtWa6SkQxvtHDmJDIJgSOvzgqdAjqtaFb5WxpGjpJJAGDnfF2cse/+KJEla3IedNVBsrMTpgZ5Xsk6OknzSHWFncJe3+qBv9JVLk4VYB3LWyQQYnMqDozs2OG0c+SeEjZ8QjBMfrS4Pbrs4WIsctqxYxTtQ4WlteZAI8wN0ocAFTUjdA2+1BXXlndEpAAE88ELXarDIC8NSmyWVD2s935Io6tm2pQibYP98+cJcdXgua9Q== 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=YDPnASpYJelJWNYK7ontFRtDPpi+l0vK475gROAW84A=; b=eLNpPW51RAdsl0c+MsM4VxkM/4oT8nCRXhroqNUqLvZKCl0WUyQeuVtIGLrxNKigqZl+YG7uEeH5uDlU8DJAEwg+Akz6AHS5thKI1lUHjCi1Y4AufOQsnshgFzY6EcLm9fdogeY1Bt6PX1H+1pjiyXP44rtph5n5e/oQjFxerDo= Received: from MW4PR04CA0314.namprd04.prod.outlook.com (2603:10b6:303:82::19) by DM4PR12MB8449.namprd12.prod.outlook.com (2603:10b6:8:17f::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.592.8; Fri, 6 Nov 2026 08:26:53 +0000 Received: from CO1PEPF0001885D.namprd02.prod.outlook.com (2603:10b6:303:82:cafe::40) by MW4PR04CA0314.outlook.office365.com (2603:10b6:303:82::19) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.592.11 via Frontend Transport; Fri, 6 Nov 2026 08:26:52 +0000 X-MS-Exchange-Authentication-Results: mx.microsoft.com 1; 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 CO1PEPF0001885D.mail.protection.outlook.com (10.167.249.246) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.615.4 via Frontend Transport; Fri, 6 Nov 2026 08:26:52 +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 15.2.2562.53; Fri, 6 Nov 2026 02:26:44 -0600 From: Honglei Huang To: Dmitry Osipenko , Akihiko Odaki , David Airlie , "Gerd Hoffmann" CC: Gurchetan Singh , Chia-I Wu , Ray Huang , , , , Honglei Huang Subject: [RFC PATCH v10 2/4] drm/virtio: add userptr blob resource to the UAPI Date: Fri, 6 Nov 2026 16:26:23 +0800 Message-ID: <20261106082625.812860-3-honghuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261106082625.812860-1-honghuan@amd.com> References: <20261106082625.812860-1-honghuan@amd.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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: CO1PEPF0001885D:EE_|DM4PR12MB8449:EE_ X-MS-Office365-Filtering-Correlation-Id: 5df2be3a-f186-4e34-05af-08df3bdfb5fa X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|23010399003|376014|1800799024|10067099003|18002099003|22082099003|261102123227099003|11063799006|261026121527099003|261022105027099003|261026140227099003|261021121427099003|261009223027099003|56012099006|261028144727099003|261009221227099003; 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)(36860700016)(82310400026)(23010399003)(376014)(1800799024)(10067099003)(18002099003)(22082099003)(261102123227099003)(11063799006)(261026121527099003)(261022105027099003)(261026140227099003)(261021121427099003)(261009223027099003)(56012099006)(261028144727099003)(261009221227099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: taOh4ucfnjSN+YVQ9KLNWaqrQnz0Mv70E/gc4zoFKQNzjvRgkLj++Pt3CuZWpRLcR1TykSOn/FqRK88ejR1VMllR9aPUeFFo8OsJLYL855IDmdiuIxEn6oBTuPlX6BtIoCzepuqLtQZ/nJmC7dtmhhgeeWw4wAyE8u2ZuF7ORzqo3+nm2Umtcc5LXrD1L+KbVTsOhNJlJc64MqnwhmL7hfB0NNfi5TK2JCzOYI9ac62Wg4Ps6Od6dDXJQQPPsfmjIgbRDwNlXsj2V3QZDghNeqG6qxr71UQMHJ9ObyrMTLn5s4hqFWOji+H69/rGxjrl3fhFmv9QA1Ay8LVymvj1UZqgd0xWPKXGzB0gYdCansbEzjcIU803vDGqMvFj2ioIlLbpjB0wPF/Ug9oOsk4z82/cH4YhNCSmdkldM4p3PCP91qQkexKVr/+QEZ4aFyRu X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Nov 2026 08:26:52.5345 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5df2be3a-f186-4e34-05af-08df3bdfb5fa 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: CO1PEPF0001885D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB8449 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 | 10 ++++++++++ include/uapi/linux/virtio_gpu.h | 5 +++++ 2 files changed, 15 insertions(+) diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index 9b886e9772..c890c754d8 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; @@ -187,6 +189,7 @@ 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 +#define VIRTGPU_BLOB_FLAG_USE_READONLY 0x0008 /* zero is invalid blob_mem */ __u32 blob_mem; __u32 blob_flags; @@ -206,6 +209,13 @@ struct drm_virtgpu_resource_create_blob { #define DRM_VIRTGPU_BLOB_FLAG_HINT_DEFER_MAPPING 0x0001 __u32 blob_hints; __u32 pad2; + + /* + * 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 e22049835e..af95374758 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 +419,7 @@ 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 +#define VIRTIO_GPU_BLOB_FLAG_USE_READONLY 0x0008 /* zero is invalid blob mem */ __le32 blob_mem; __le32 blob_flags; -- 2.34.1