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Mon, 21 Oct 2024 17:20:10 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v4 08/11] iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST Date: Mon, 21 Oct 2024 17:19:30 -0700 Message-ID: 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: BL02EPF0001A101:EE_|IA0PR12MB8713:EE_ X-MS-Office365-Filtering-Correlation-Id: b4b90187-1ce9-4e88-92ea-08dcf22f560c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|7416014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(376014)(36860700013)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2024 00:20:29.8629 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b4b90187-1ce9-4e88-92ea-08dcf22f560c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A101.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8713 Implement the viommu alloc/free functions to increase/reduce refcount of its dependent mock iommu device. User space can verify this loop via the IOMMU_VIOMMU_TYPE_SELFTEST. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 2 ++ drivers/iommu/iommufd/selftest.c | 41 ++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index f4bc23a92f9a..edced4ac7cd3 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -180,4 +180,6 @@ struct iommu_hwpt_invalidate_selftest { __u32 iotlb_id; }; +#define IOMMU_VIOMMU_TYPE_SELFTEST 0xdeadbeef + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index dbd2a78c1074..04dd95fe24ca 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -132,6 +132,10 @@ struct mock_iommu_domain_nested { u32 iotlb[MOCK_NESTED_DOMAIN_IOTLB_NUM]; }; +struct mock_viommu { + struct iommufd_viommu core; +}; + enum selftest_obj_type { TYPE_IDEV, }; @@ -543,6 +547,42 @@ static int mock_dev_disable_feat(struct device *dev, enum iommu_dev_features fea return 0; } +static void mock_viommu_free(struct iommufd_viommu *viommu) +{ + struct mock_iommu_device *mock_iommu = container_of( + viommu->iommu_dev, struct mock_iommu_device, iommu_dev); + + if (refcount_dec_and_test(&mock_iommu->users)) + complete(&mock_iommu->complete); + + /* iommufd core frees mock_viommu and viommu */ +} + +static struct iommufd_viommu_ops mock_viommu_ops = { + .free = mock_viommu_free, +}; + +static struct iommufd_viommu *mock_viommu_alloc(struct device *dev, + struct iommu_domain *domain, + struct iommufd_ctx *ictx, + unsigned int viommu_type) +{ + struct mock_iommu_device *mock_iommu = + iommu_get_iommu_dev(dev, struct mock_iommu_device, iommu_dev); + struct mock_viommu *mock_viommu; + + if (viommu_type != IOMMU_VIOMMU_TYPE_SELFTEST) + return ERR_PTR(-EOPNOTSUPP); + + mock_viommu = + iommufd_viommu_alloc(ictx, mock_viommu, core, &mock_viommu_ops); + if (IS_ERR(mock_viommu)) + return ERR_CAST(mock_viommu); + + refcount_inc(&mock_iommu->users); + return &mock_viommu->core; +} + static const struct iommu_ops mock_ops = { /* * IOMMU_DOMAIN_BLOCKED cannot be returned from def_domain_type() @@ -562,6 +602,7 @@ static const struct iommu_ops mock_ops = { .dev_enable_feat = mock_dev_enable_feat, .dev_disable_feat = mock_dev_disable_feat, .user_pasid_table = true, + .viommu_alloc = mock_viommu_alloc, .default_domain_ops = &(struct iommu_domain_ops){ .free = mock_domain_free,