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Tue, 5 Nov 2024 12:04:56 -0800 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v7 11/13] iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST Date: Tue, 5 Nov 2024 12:04:27 -0800 Message-ID: <9d755a215a3007d4d8d1c2513846830332db62aa.1730836219.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: BL02EPF00021F6E:EE_|DM6PR12MB4297:EE_ X-MS-Office365-Filtering-Correlation-Id: 353d9e5d-1826-48c1-ba48-08dcfdd526af X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|82310400026|36860700013|7416014|376014; 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)(82310400026)(36860700013)(7416014)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2024 20:05:09.7117 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 353d9e5d-1826-48c1-ba48-08dcfdd526af 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: BL02EPF00021F6E.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4297 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. Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 2 + drivers/iommu/iommufd/selftest.c | 67 ++++++++++++++++++++++++++++ 2 files changed, 69 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 4f67a83f667a..31c8f78a3a66 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -134,6 +134,7 @@ to_mock_domain(struct iommu_domain *domain) struct mock_iommu_domain_nested { struct iommu_domain domain; + struct mock_viommu *mock_viommu; struct mock_iommu_domain *parent; u32 iotlb[MOCK_NESTED_DOMAIN_IOTLB_NUM]; }; @@ -144,6 +145,16 @@ to_mock_nested(struct iommu_domain *domain) return container_of(domain, struct mock_iommu_domain_nested, domain); } +struct mock_viommu { + struct iommufd_viommu core; + struct mock_iommu_domain *s2_parent; +}; + +static inline struct mock_viommu *to_mock_viommu(struct iommufd_viommu *viommu) +{ + return container_of(viommu, struct mock_viommu, core); +} + enum selftest_obj_type { TYPE_IDEV, }; @@ -569,6 +580,61 @@ static int mock_dev_disable_feat(struct device *dev, enum iommu_dev_features fea return 0; } +static void mock_viommu_destroy(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 iommu_domain * +mock_viommu_alloc_domain_nested(struct iommufd_viommu *viommu, u32 flags, + const struct iommu_user_data *user_data) +{ + struct mock_viommu *mock_viommu = to_mock_viommu(viommu); + struct mock_iommu_domain_nested *mock_nested; + + if (flags & ~IOMMU_HWPT_FAULT_ID_VALID) + return ERR_PTR(-EOPNOTSUPP); + + mock_nested = __mock_domain_alloc_nested(user_data); + if (IS_ERR(mock_nested)) + return ERR_CAST(mock_nested); + mock_nested->mock_viommu = mock_viommu; + mock_nested->parent = mock_viommu->s2_parent; + return &mock_nested->domain; +} + +static struct iommufd_viommu_ops mock_viommu_ops = { + .destroy = mock_viommu_destroy, + .alloc_domain_nested = mock_viommu_alloc_domain_nested, +}; + +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, struct 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() @@ -588,6 +654,7 @@ 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,