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iommufd/selftest: Add mock_domain_cache_invalidate_user support

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Add mock_domain_cache_invalidate_user() data structure to support user
space selftest program to cover user cache invalidation pathway.

Link: https://lore.kernel.org/r/20240111041015.47920-5-yi.l.liu@intel.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Co-developed-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Nicolin Chen 2024-01-10 20:10:11 -08:00 committed by Jason Gunthorpe
parent 77785117f9
commit ac8691203c
2 changed files with 68 additions and 0 deletions
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18
drivers/iommu/iommufd/iommufd_test.h
View File

@ -148,4 +148,22 @@ struct iommu_hwpt_selftest {
__u32 iotlb;
};
/* Should not be equal to any defined value in enum iommu_hwpt_invalidate_data_type */
#define IOMMU_HWPT_INVALIDATE_DATA_SELFTEST 0xdeadbeef
#define IOMMU_HWPT_INVALIDATE_DATA_SELFTEST_INVALID 0xdadbeef
/**
* struct iommu_hwpt_invalidate_selftest - Invalidation data for Mock driver
* (IOMMU_HWPT_INVALIDATE_DATA_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_FLAG_ALL (1 << 0)
__u32 flags;
__u32 iotlb_id;
};
#endif

50
drivers/iommu/iommufd/selftest.c
View File

@ -473,9 +473,59 @@ static void mock_domain_free_nested(struct iommu_domain *domain)
kfree(mock_nested);
}
static int
mock_domain_cache_invalidate_user(struct iommu_domain *domain,
struct iommu_user_data_array *array)
{
struct mock_iommu_domain_nested *mock_nested =
container_of(domain, struct mock_iommu_domain_nested, domain);
struct iommu_hwpt_invalidate_selftest inv;
u32 processed = 0;
int i = 0, j;
int rc = 0;
if (array->type != IOMMU_HWPT_INVALIDATE_DATA_SELFTEST) {
rc = -EINVAL;
goto out;
}
for ( ; i < array->entry_num; i++) {
rc = iommu_copy_struct_from_user_array(&inv, array,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
i, iotlb_id);
if (rc)
break;
if (inv.flags & ~IOMMU_TEST_INVALIDATE_FLAG_ALL) {
rc = -EOPNOTSUPP;
break;
}
if (inv.iotlb_id > MOCK_NESTED_DOMAIN_IOTLB_ID_MAX) {
rc = -EINVAL;
break;
}
if (inv.flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) {
/* Invalidate all mock iotlb entries and ignore iotlb_id */
for (j = 0; j < MOCK_NESTED_DOMAIN_IOTLB_NUM; j++)
mock_nested->iotlb[j] = 0;
} else {
mock_nested->iotlb[inv.iotlb_id] = 0;
}
processed++;
}
out:
array->entry_num = processed;
return rc;
}
static struct iommu_domain_ops domain_nested_ops = {
.free = mock_domain_free_nested,
.attach_dev = mock_domain_nop_attach,
.cache_invalidate_user = mock_domain_cache_invalidate_user,
};
static inline struct iommufd_hw_pagetable *