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Fri, 17 Oct 2025 08:43:20 +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 08:43:21 +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 01:43:16 -0700 From: Zhu Lingshan To: , CC: , , Zhu Lingshan Subject: [PATCH V5 06/18] amdkfd: process svm ioctl only on the primary kfd process Date: Fri, 17 Oct 2025 16:42:10 +0800 Message-ID: <20251017084222.54721-7-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_|IA0PR12MB8973:EE_ X-MS-Office365-Filtering-Correlation-Id: 652ecd1e-88b6-4e80-c2d4-08de0d593a99 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)(1800799024)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Oct 2025 08:43:21.8915 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 652ecd1e-88b6-4e80-c2d4-08de0d593a99 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: IA0PR12MB8973 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" svm ioctl should only be processed on the primary kfd process because only the lifecycle of the primary kfd process is tied to the user space applicaiton. Another reason is in virtualization the hypervisor owns the primary kfd process as a privileged one. 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 158e75975557..58d90bebdff7 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1718,6 +1718,12 @@ static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data) struct kfd_ioctl_svm_args *args = data; int r = 0; + if (p->context_id != KFD_CONTEXT_ID_PRIMARY) { + pr_debug("SVM ioctl not supported on non-primary kfd process\n"); + + return -EOPNOTSUPP; + } + pr_debug("start 0x%llx size 0x%llx op 0x%x nattr 0x%x\n", args->start_addr, args->size, args->op, args->nattr); -- 2.51.0