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Fri, 17 Oct 2025 08:43:21 +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 DS1PEPF00017097.mail.protection.outlook.com (10.167.18.101) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9253.7 via Frontend Transport; Fri, 17 Oct 2025 08:43:22 +0000 Received: from fedora.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 15.2.2562.17; Fri, 17 Oct 2025 01:43:18 -0700 From: Zhu Lingshan To: , CC: , , Zhu Lingshan Subject: [PATCH V5 07/18] amdkfd: process USERPTR allocation only on the primary kfd process Date: Fri, 17 Oct 2025 16:42:11 +0800 Message-ID: <20251017084222.54721-8-lingshan.zhu@amd.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251017084222.54721-1-lingshan.zhu@amd.com> References: <20251017084222.54721-1-lingshan.zhu@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF00017097:EE_|IA1PR12MB9468:EE_ X-MS-Office365-Filtering-Correlation-Id: f4e166d6-5599-4043-f2e5-08de0d593ae2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:satlexmb07.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(376014)(82310400026)(36860700013)(1800799024); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Oct 2025 08:43:22.3719 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f4e166d6-5599-4043-f2e5-08de0d593ae2 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: DS1PEPF00017097.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB9468 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" The lifecycle of the primary kfd process is tied to the user space program, all secondary kfd process would be destroyed when fd close. Thus only the primary kfd process should process USERPTR memory allocation. Signed-off-by: Zhu Lingshan --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 58d90bebdff7..d1cb22f48b00 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1062,6 +1062,12 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, if (args->size == 0) return -EINVAL; + if (p->context_id != KFD_CONTEXT_ID_PRIMARY && (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR)) { + pr_debug("USERPTR is not supported on non-primary kfd_process\n"); + + return -EOPNOTSUPP; + } + #if IS_ENABLED(CONFIG_HSA_AMD_SVM) /* Flush pending deferred work to avoid racing with deferred actions * from previous memory map changes (e.g. munmap). -- 2.51.0