This adds the data structure for flushing iotlb for the nested domain allocated with IOMMU_HWPT_DATA_VTD_S1 type.
This only supports invalidating IOTLB, but no for device-TLB as device-TLB invalidation will be covered automatically in the IOTLB invalidation if the underlying IOMMU driver has enabled ATS for the affected device.
Signed-off-by: Yi Liu yi.l.liu@intel.com --- include/uapi/linux/iommufd.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index c8f523a7bc06..a910f67e344b 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -519,6 +519,42 @@ struct iommu_hw_info { }; #define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO)
+/** + * enum iommu_hwpt_vtd_s1_invalidate_flags - Flags for Intel VT-d + * stage-1 cache invalidation + * @IOMMU_VTD_INV_FLAGS_LEAF: The LEAF flag indicates whether only the + * leaf PTE caching needs to be invalidated + * and other paging structure caches can be + * preserved. + */ +enum iommu_hwpt_vtd_s1_invalidate_flags { + IOMMU_VTD_INV_FLAGS_LEAF = 1 << 0, +}; + +/** + * struct iommu_hwpt_vtd_s1_invalidate - Intel VT-d cache invalidation + * (IOMMU_HWPT_DATA_VTD_S1) + * @addr: The start address of the addresses to be invalidated. It needs + * to be 4KB aligned. + * @npages: Number of contiguous 4K pages to be invalidated. + * @flags: Combination of enum iommu_hwpt_vtd_s1_invalidate_flags + * @__reserved: Must be 0 + * + * The Intel VT-d specific invalidation data for user-managed stage-1 cache + * invalidation in nested translation. Userspace uses this structure to + * tell the impacted cache scope after modifying the stage-1 page table. + * + * Invalidating all the caches related to the page table by setting @addr + * to be 0 and @npages to be __aligned_u64(-1). This includes the + * corresponding device-TLB if ATS is enabled on the attached devices. + */ +struct iommu_hwpt_vtd_s1_invalidate { + __aligned_u64 addr; + __aligned_u64 npages; + __u32 flags; + __u32 __reserved; +}; + /** * struct iommu_hwpt_invalidate - ioctl(IOMMU_HWPT_INVALIDATE) * @size: sizeof(struct iommu_hwpt_invalidate)