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Fri, 25 Oct 2024 16:50:15 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 10/13] iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST Date: Fri, 25 Oct 2024 16:49:50 -0700 Message-ID: <30f593e688e881b8cfee007e2ed2eb7a190a01d5.1729897352.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: CO1PEPF000075EE:EE_|SA3PR12MB8021:EE_ X-MS-Office365-Filtering-Correlation-Id: 1b819e88-d332-49d5-8365-08dcf54fce77 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|7416014|36860700013|376014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge2.nvidia.com; CAT:NONE; SFS:(13230040)(1800799024)(7416014)(36860700013)(376014)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Oct 2024 23:50:29.4146 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1b819e88-d332-49d5-8365-08dcf54fce77 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.233]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000075EE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB8021 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 Reviewed-by: Jason Gunthorpe --- drivers/iommu/iommufd/iommufd_test.h | 2 + drivers/iommu/iommufd/selftest.c | 64 ++++++++++++++++++++++++++++ 2 files changed, 66 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 2d33b35da704..33a0fcc0eff7 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 +580,58 @@ 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 iommu_domain * +mock_viommu_alloc_domain_nested(struct iommufd_viommu *viommu, + const struct iommu_user_data *user_data) +{ + struct mock_viommu *mock_viommu = to_mock_viommu(viommu); + struct mock_iommu_domain_nested *mock_nested; + + 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 = { + .free = mock_viommu_free, + .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 +651,7 @@ 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,