diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2023-09-28 00:15:26 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-10 13:31:24 -0300 |
| commit | 4ff542163397073f86eda484318d61980ff1031d (patch) | |
| tree | 669d646d8406901948e805715ecf8f5041d2d9af /include | |
| parent | 89d63875d80ea127280c60dd4cd101af1d9b6557 (diff) | |
| download | linux-stable-4ff542163397073f86eda484318d61980ff1031d.tar.gz linux-stable-4ff542163397073f86eda484318d61980ff1031d.tar.bz2 linux-stable-4ff542163397073f86eda484318d61980ff1031d.zip | |
iommufd: Support allocating nested parent domain
Extend IOMMU_HWPT_ALLOC to allocate domains to be used as parent (stage-2)
in nested translation.
Add IOMMU_HWPT_ALLOC_NEST_PARENT to the uAPI.
Link: https://lore.kernel.org/r/20230928071528.26258-5-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: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index b4ba0c0cbab6..4a7c5c8fdbb4 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -348,9 +348,19 @@ struct iommu_vfio_ioas { #define IOMMU_VFIO_IOAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VFIO_IOAS) /** + * enum iommufd_hwpt_alloc_flags - Flags for HWPT allocation + * @IOMMU_HWPT_ALLOC_NEST_PARENT: If set, allocate a domain which can serve + * as the parent domain in the nesting + * configuration. + */ +enum iommufd_hwpt_alloc_flags { + IOMMU_HWPT_ALLOC_NEST_PARENT = 1 << 0, +}; + +/** * struct iommu_hwpt_alloc - ioctl(IOMMU_HWPT_ALLOC) * @size: sizeof(struct iommu_hwpt_alloc) - * @flags: Must be 0 + * @flags: Combination of enum iommufd_hwpt_alloc_flags * @dev_id: The device to allocate this HWPT for * @pt_id: The IOAS to connect this HWPT to * @out_hwpt_id: The ID of the new HWPT |