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iommufd/selftest: Add a helper to get test device

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There is need to get the selftest device (sobj->type == TYPE_IDEV) in
multiple places, so have a helper to for it.

Link: https://patch.msgid.link/r/20250321171940.7213-17-yi.l.liu@intel.com
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yi Liu 2025-03-21 10:19:38 -07:00 committed by Jason Gunthorpe
parent 9eb59204d5
commit 068e140251
1 changed files with 23 additions and 13 deletions
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36
drivers/iommu/iommufd/selftest.c
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@ -996,39 +996,49 @@ static int iommufd_test_mock_domain(struct iommufd_ucmd *ucmd,
return rc;
}
/* Replace the mock domain with a manually allocated hw_pagetable */
static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
unsigned int device_id, u32 pt_id,
struct iommu_test_cmd *cmd)
static struct selftest_obj *
iommufd_test_get_selftest_obj(struct iommufd_ctx *ictx, u32 id)
{
struct iommufd_object *dev_obj;
struct selftest_obj *sobj;
int rc;
/*
* Prefer to use the OBJ_SELFTEST because the destroy_rwsem will ensure
* it doesn't race with detach, which is not allowed.
*/
dev_obj =
iommufd_get_object(ucmd->ictx, device_id, IOMMUFD_OBJ_SELFTEST);
dev_obj = iommufd_get_object(ictx, id, IOMMUFD_OBJ_SELFTEST);
if (IS_ERR(dev_obj))
return PTR_ERR(dev_obj);
return ERR_CAST(dev_obj);
sobj = to_selftest_obj(dev_obj);
if (sobj->type != TYPE_IDEV) {
rc = -EINVAL;
goto out_dev_obj;
iommufd_put_object(ictx, dev_obj);
return ERR_PTR(-EINVAL);
}
return sobj;
}
/* Replace the mock domain with a manually allocated hw_pagetable */
static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
unsigned int device_id, u32 pt_id,
struct iommu_test_cmd *cmd)
{
struct selftest_obj *sobj;
int rc;
sobj = iommufd_test_get_selftest_obj(ucmd->ictx, device_id);
if (IS_ERR(sobj))
return PTR_ERR(sobj);
rc = iommufd_device_replace(sobj->idev.idev, IOMMU_NO_PASID, &pt_id);
if (rc)
goto out_dev_obj;
goto out_sobj;
cmd->mock_domain_replace.pt_id = pt_id;
rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd));
out_dev_obj:
iommufd_put_object(ucmd->ictx, dev_obj);
out_sobj:
iommufd_put_object(ucmd->ictx, &sobj->obj);
return rc;
}