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Wed, 30 Oct 2024 14:35:10 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 11/13] iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST Date: Wed, 30 Oct 2024 14:34:37 -0700 Message-ID: <3f2c6db0a7a5ad0209c61304b6c5348a8d3df6ec.1730313237.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: SN1PEPF0002BA4E:EE_|PH7PR12MB6665:EE_ X-MS-Office365-Filtering-Correlation-Id: a47c069b-b154-4706-1918-08dcf92ac673 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|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)(82310400026)(376014)(7416014)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2024 21:35:29.1736 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a47c069b-b154-4706-1918-08dcf92ac673 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: SN1PEPF0002BA4E.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6665 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,