diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2023-08-18 03:10:33 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-08-18 12:52:15 -0300 |
| commit | 55243393b06ced5378dcdbb7d51bd8a8edc69294 (patch) | |
| tree | 1285aa02a27eb565b23f918b68e2d8cd591069d8 /include/uapi/linux/iommufd.h | |
| parent | af4fde93c3196ed2cd4e64109a9307a7bc471c5a (diff) | |
iommu/vt-d: Implement hw_info for iommu capability query
Add intel_iommu_hw_info() to report cap_reg and ecap_reg information.
Link: https://lore.kernel.org/r/20230818101033.4100-6-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.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 'include/uapi/linux/iommufd.h')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index e01d5ac00dc3..b4ba0c0cbab6 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -373,12 +373,35 @@ struct iommu_hwpt_alloc { #define IOMMU_HWPT_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HWPT_ALLOC) /** + * struct iommu_hw_info_vtd - Intel VT-d hardware information + * + * @flags: Must be 0 + * @__reserved: Must be 0 + * + * @cap_reg: Value of Intel VT-d capability register defined in VT-d spec + * section 11.4.2 Capability Register. + * @ecap_reg: Value of Intel VT-d capability register defined in VT-d spec + * section 11.4.3 Extended Capability Register. + * + * User needs to understand the Intel VT-d specification to decode the + * register value. + */ +struct iommu_hw_info_vtd { + __u32 flags; + __u32 __reserved; + __aligned_u64 cap_reg; + __aligned_u64 ecap_reg; +}; + +/** * enum iommu_hw_info_type - IOMMU Hardware Info Types * @IOMMU_HW_INFO_TYPE_NONE: Used by the drivers that do not report hardware * info + * @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type */ enum iommu_hw_info_type { IOMMU_HW_INFO_TYPE_NONE, + IOMMU_HW_INFO_TYPE_INTEL_VTD, }; /** |