diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2023-10-26 06:39:35 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-26 16:15:57 +0200 |
| commit | bd529dbb661d62bd9f03e44c9fc837d98a190499 (patch) | |
| tree | 0ca171c36e5e85b00d526d43ffbb009c43109b16 /drivers/iommu/iommufd/device.c | |
| parent | iommu: Pass in parent domain with user_data to domain_alloc_user op (diff) | |
| download | linux-bd529dbb661d62bd9f03e44c9fc837d98a190499.tar.xz linux-bd529dbb661d62bd9f03e44c9fc837d98a190499.zip | |
iommufd: Add a nested HW pagetable object
IOMMU_HWPT_ALLOC already supports iommu_domain allocation for usersapce.
But it can only allocate a hw_pagetable that associates to a given IOAS,
i.e. only a kernel-managed hw_pagetable of IOMMUFD_OBJ_HWPT_PAGING type.
IOMMU drivers can now support user-managed hw_pagetables, for two-stage
translation use cases that require user data input from the user space.
Add a new IOMMUFD_OBJ_HWPT_NESTED type with its abort/destroy(). Pair it
with a new iommufd_hwpt_nested structure and its to_hwpt_nested() helper.
Update the to_hwpt_paging() helper, so a NESTED-type hw_pagetable can be
handled in the callers, for example iommufd_hw_pagetable_enforce_rr().
Screen the inputs including the parent PAGING-type hw_pagetable that has
a need of a new nest_parent flag in the iommufd_hwpt_paging structure.
Extend the IOMMU_HWPT_ALLOC ioctl to accept an IOMMU driver specific data
input which is tagged by the enum iommu_hwpt_data_type. Also, update the
@pt_id to accept hwpt_id too besides an ioas_id. Then, use them to allocate
a hw_pagetable of IOMMUFD_OBJ_HWPT_NESTED type using the
iommufd_hw_pagetable_alloc_nested() allocator.
Link: https://lore.kernel.org/r/20231026043938.63898-8-yi.l.liu@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>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/iommufd/device.c')
| -rw-r--r-- | drivers/iommu/iommufd/device.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index a99ce4547353..59d3a07300d9 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -588,7 +588,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, } hwpt_paging = iommufd_hwpt_paging_alloc(idev->ictx, ioas, idev, 0, - immediate_attach); + immediate_attach, NULL); if (IS_ERR(hwpt_paging)) { destroy_hwpt = ERR_CAST(hwpt_paging); goto out_unlock; @@ -628,6 +628,7 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, return PTR_ERR(pt_obj); switch (pt_obj->type) { + case IOMMUFD_OBJ_HWPT_NESTED: case IOMMUFD_OBJ_HWPT_PAGING: { struct iommufd_hw_pagetable *hwpt = container_of(pt_obj, struct iommufd_hw_pagetable, obj); |