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Tue, 3 Dec 2024 14:10:41 -0800 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 07/13] iommufd/viommu: Add iommufd_viommu_report_irq helper Date: Tue, 3 Dec 2024 14:10:12 -0800 Message-ID: <7e9842376e6235d9e3471356d035afe2bfe8f33b.1733263737.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN1PEPF0000F0E2:EE_|IA0PR12MB7676:EE_ X-MS-Office365-Filtering-Correlation-Id: 3debc2dd-aa90-4e77-4257-08dd13e75d86 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: 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 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)(376014)(7416014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Dec 2024 22:10:58.2525 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3debc2dd-aa90-4e77-4257-08dd13e75d86 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: MN1PEPF0000F0E2.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7676 Similar to iommu_report_device_fault, this allows IOMMU drivers to report, from threaded IRQ handlers to user space hypervisors, IRQs or events that belong to a vIOMMU. Signed-off-by: Nicolin Chen --- include/linux/iommufd.h | 9 ++++++++ drivers/iommu/iommufd/driver.c | 41 ++++++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+) diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 1f5376476cfa..2ce78edec4e9 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -192,6 +192,8 @@ struct device *iommufd_viommu_find_dev(struct iommufd_viommu *viommu, unsigned long vdev_id); unsigned long iommufd_viommu_get_vdev_id(struct iommufd_viommu *viommu, struct device *dev); +int iommufd_viommu_report_irq(struct iommufd_viommu *viommu, unsigned int type, + void *irq_ptr, size_t irq_len); #else /* !CONFIG_IOMMUFD_DRIVER_CORE */ static inline struct iommufd_object * _iommufd_object_alloc(struct iommufd_ctx *ictx, size_t size, @@ -211,6 +213,13 @@ iommufd_viommu_get_vdev_id(struct iommufd_viommu *viommu, struct device *dev) { return 0; } + +static inline int iommufd_viommu_report_irq(struct iommufd_viommu *viommu, + unsigned int type, void *irq_ptr, + size_t irq_len) +{ + return -EOPNOTSUPP; +} #endif /* CONFIG_IOMMUFD_DRIVER_CORE */ /* diff --git a/drivers/iommu/iommufd/driver.c b/drivers/iommu/iommufd/driver.c index 817e430a11bc..339baa270d1e 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -67,5 +67,46 @@ unsigned long iommufd_viommu_get_vdev_id(struct iommufd_viommu *viommu, } EXPORT_SYMBOL_NS_GPL(iommufd_viommu_get_vdev_id, IOMMUFD); +/* Typically called in driver's threaded IRQ handler */ +int iommufd_viommu_report_irq(struct iommufd_viommu *viommu, unsigned int type, + void *irq_ptr, size_t irq_len) +{ + struct iommufd_eventq_virq *eventq_virq; + struct iommufd_virq *virq; + int rc = 0; + + might_sleep(); + + if (!viommu) + return -ENODEV; + if (WARN_ON_ONCE(!irq_len || !irq_ptr)) + return -EINVAL; + + down_read(&viommu->virqs_rwsem); + + eventq_virq = iommufd_viommu_find_eventq_virq(viommu, type); + if (!eventq_virq) { + rc = -EOPNOTSUPP; + goto out_unlock_vdev_ids; + } + + virq = kzalloc(sizeof(*virq) + irq_len, GFP_KERNEL); + if (!virq) { + rc = -ENOMEM; + goto out_unlock_vdev_ids; + } + virq->irq_data = (void *)virq + sizeof(*virq); + memcpy(virq->irq_data, irq_ptr, irq_len); + + virq->eventq_virq = eventq_virq; + virq->irq_len = irq_len; + + iommufd_eventq_virq_handler(virq); +out_unlock_vdev_ids: + up_read(&viommu->virqs_rwsem); + return rc; +} +EXPORT_SYMBOL_NS_GPL(iommufd_viommu_report_irq, IOMMUFD); + MODULE_DESCRIPTION("iommufd code shared with builtin modules"); MODULE_LICENSE("GPL");