From: Nicolin Chen nicolinc@nvidia.com
Add mock_domain_cache_invalidate_user() data structure to support user space selftest program to cover user cache invalidation pathway.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Yi Liu yi.l.liu@intel.com --- drivers/iommu/iommufd/iommufd_test.h | 17 +++++++++++ drivers/iommu/iommufd/selftest.c | 44 ++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+)
diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 7f997234a1a8..748349dd5bf4 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -127,4 +127,21 @@ struct iommu_hwpt_selftest { __u32 iotlb; };
+/** + * struct iommu_hwpt_invalidate_selftest + * + * @flags: invalidate flags + * @iotlb_id: invalidate iotlb entry index + * + * If IOMMU_TEST_INVALIDATE_ALL is set in @flags, @iotlb_id will be ignored + */ +struct iommu_hwpt_invalidate_selftest { +#define IOMMU_TEST_INVALIDATE_ALL (1ULL << 0) + __u32 flags; + __u32 iotlb_id; +}; + +#define IOMMU_TEST_INVALIDATE_ERR_FETCH 0xdeadbeee +#define IOMMU_TEST_INVALIDATE_ERR_REQ 0xdeadbeef + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index bd967317927f..ebb2abc40c4a 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -428,9 +428,53 @@ static const struct iommu_ops mock_ops = { }, };
+static int +mock_domain_cache_invalidate_user(struct iommu_domain *domain, + struct iommu_user_data_array *array, + u32 *error_code) +{ + const size_t min_len = + offsetofend(struct iommu_hwpt_invalidate_selftest, iotlb_id); + struct mock_iommu_domain *mock = + container_of(domain, struct mock_iommu_domain, domain); + struct iommu_hwpt_invalidate_selftest inv; + int rc = 0; + int i, j; + + if (domain->type != IOMMU_DOMAIN_NESTED || !mock->nested) + return -EINVAL; + + for (i = 0; i < array->entry_num; i++) { + rc = iommu_copy_user_data_from_array(&inv, array, + i, sizeof(inv), min_len); + if (rc) { + *error_code = IOMMU_TEST_INVALIDATE_ERR_FETCH; + goto err; + } + /* Invalidate all mock iotlb entries and ignore iotlb_id */ + if (inv.flags & IOMMU_TEST_INVALIDATE_ALL) { + for (j = 0; j < MOCK_NESTED_DOMAIN_IOTLB_NUM; j++) + mock->iotlb[j] = 0; + continue; + } + /* Treat out-of-boundry iotlb_id as a request error */ + if (inv.iotlb_id > MOCK_NESTED_DOMAIN_IOTLB_ID_MAX) { + *error_code = IOMMU_TEST_INVALIDATE_ERR_REQ; + rc = -EINVAL; + goto err; + } + mock->iotlb[inv.iotlb_id] = 0; + } + +err: + array->entry_num = i; + return rc; +} + static struct iommu_domain_ops domain_nested_ops = { .free = mock_domain_free, .attach_dev = mock_domain_nop_attach, + .cache_invalidate_user = mock_domain_cache_invalidate_user, };
static inline struct iommufd_hw_pagetable *