diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2024-01-11 07:10:09 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-01-11 19:55:04 +0300 |
| commit | 8c6eabae3807e048b9f17733af5e20500fbf858c (patch) | |
| tree | 80727e96b2fa2344e894215a4861703bac79ed32 /drivers/iommu/iommufd/iommufd_private.h | |
| parent | f35b88b66fbb5c90298ce3aa483b8a2cf1f39ad0 (diff) | |
| download | linux-8c6eabae3807e048b9f17733af5e20500fbf858c.tar.xz | |
iommufd: Add IOMMU_HWPT_INVALIDATE
In nested translation, the stage-1 page table is user-managed but cached
by the IOMMU hardware, so an update on present page table entries in the
stage-1 page table should be followed with a cache invalidation.
Add an IOMMU_HWPT_INVALIDATE ioctl to support such a cache invalidation.
It takes hwpt_id to specify the iommu_domain, and a multi-entry array to
support multiple invalidation data in one ioctl.
enum iommu_hwpt_invalidate_data_type is defined to tag the data type of
the entries in the multi-entry array.
Link: https://lore.kernel.org/r/20240111041015.47920-3-yi.l.liu@intel.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Co-developed-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/iommufd/iommufd_private.h')
| -rw-r--r-- | drivers/iommu/iommufd/iommufd_private.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index abae041e256f..991f864d1f9b 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -328,6 +328,15 @@ iommufd_get_hwpt_paging(struct iommufd_ucmd *ucmd, u32 id) IOMMUFD_OBJ_HWPT_PAGING), struct iommufd_hwpt_paging, common.obj); } + +static inline struct iommufd_hw_pagetable * +iommufd_get_hwpt_nested(struct iommufd_ucmd *ucmd, u32 id) +{ + return container_of(iommufd_get_object(ucmd->ictx, id, + IOMMUFD_OBJ_HWPT_NESTED), + struct iommufd_hw_pagetable, obj); +} + int iommufd_hwpt_set_dirty_tracking(struct iommufd_ucmd *ucmd); int iommufd_hwpt_get_dirty_bitmap(struct iommufd_ucmd *ucmd); @@ -345,6 +354,7 @@ void iommufd_hwpt_paging_abort(struct iommufd_object *obj); void iommufd_hwpt_nested_destroy(struct iommufd_object *obj); void iommufd_hwpt_nested_abort(struct iommufd_object *obj); int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd); +int iommufd_hwpt_invalidate(struct iommufd_ucmd *ucmd); static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx, struct iommufd_hw_pagetable *hwpt) |