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Tue, 17 Dec 2024 21:01:33 -0800 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v3 08/14] iommufd/viommu: Add iommufd_viommu_report_irq helper Date: Tue, 17 Dec 2024 21:00:21 -0800 Message-ID: <3d2298e45c9d5e433cb2c65a17c6d3bbe570918f.1734477608.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000A6732:EE_|DS7PR12MB6141:EE_ X-MS-Office365-Filtering-Correlation-Id: 9716673e-6e8b-43d4-ae4a-08dd1f21128f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Dec 2024 05:01:46.0703 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9716673e-6e8b-43d4-ae4a-08dd1f21128f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000A6732.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6141 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241217_210153_031420_638E105F X-CRM114-Status: GOOD ( 12.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 | 37 ++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index ac1f1897d290..c5909125775a 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 e5d7397c0a6c..2ab793f27f72 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -69,5 +69,42 @@ 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_virq_header *header; + struct iommufd_virq *virq; + int rc = 0; + + if (!viommu) + return -ENODEV; + if (WARN_ON_ONCE(!irq_len || !irq_ptr)) + return -EINVAL; + + down_read(&viommu->virqs_rwsem); + + virq = iommufd_viommu_find_virq(viommu, type); + if (!virq) { + rc = -EOPNOTSUPP; + goto out_unlock_virqs; + } + + header = kzalloc(sizeof(*header) + irq_len, GFP_KERNEL); + if (!header) { + rc = -ENOMEM; + goto out_unlock_virqs; + } + header->irq_data = (void *)header + sizeof(*header); + memcpy(header->irq_data, irq_ptr, irq_len); + header->irq_len = irq_len; + + iommufd_virq_handler(virq, header); +out_unlock_virqs: + 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");