diff options
| author | Jason Gunthorpe <jgg@ziepe.ca> | 2024-10-28 09:38:01 +0000 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-10-29 10:08:18 +0100 |
| commit | b7a0855eb95f6db8ac8e17596e76f7b94a790fe6 (patch) | |
| tree | ca6d70d96c7e2f1bc49ce7db3aa9e8213132ec38 /include/uapi/linux | |
| parent | 20858d4ebb423826b7a978d54cde195f51d87e20 (diff) | |
iommu: Add new flag to explictly request PASID capable domain
Introduce new flag (IOMMU_HWPT_ALLOC_PASID) to domain_alloc_users() ops.
If IOMMU supports PASID it will allocate domain. Otherwise return error.
In error path check for -EOPNOTSUPP and try to allocate non-PASID
domain so that DMA-API mode work fine for drivers which does not support
PASID as well.
Also modify __iommu_group_alloc_default_domain() to call
iommu_paging_domain_alloc_flags() with appropriate flag when allocating
paging domain.
Signed-off-by: Jason Gunthorpe <jgg@ziepe.ca>
Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20241028093810.5901-4-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 72010f71c5e4..0c0ed28ee113 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -359,11 +359,19 @@ struct iommu_vfio_ioas { * enforced on device attachment * @IOMMU_HWPT_FAULT_ID_VALID: The fault_id field of hwpt allocation data is * valid. + * @IOMMU_HWPT_ALLOC_PASID: Requests a domain that can be used with PASID. The + * domain can be attached to any PASID on the device. + * Any domain attached to the non-PASID part of the + * device must also be flaged, otherwise attaching a + * PASID will blocked. + * If IOMMU does not support PASID it will return + * error (-EOPNOTSUPP). */ enum iommufd_hwpt_alloc_flags { IOMMU_HWPT_ALLOC_NEST_PARENT = 1 << 0, IOMMU_HWPT_ALLOC_DIRTY_TRACKING = 1 << 1, IOMMU_HWPT_FAULT_ID_VALID = 1 << 2, + IOMMU_HWPT_ALLOC_PASID = 1 << 3, }; /** |