6 Dec
2023
6 Dec
'23
6:33 p.m.
On Fri, Nov 17, 2023 at 05:07:13AM -0800, Yi Liu wrote:
+/**
- struct iommu_hwpt_invalidate - ioctl(IOMMU_HWPT_INVALIDATE)
- @size: sizeof(struct iommu_hwpt_invalidate)
- @hwpt_id: HWPT ID of a nested HWPT for cache invalidation
- @reqs_uptr: User pointer to an array having @req_num of cache invalidation
requests. The request entries in the array are of fixed width
@req_len, and contain a user data structure for invalidation
request specific to the given hardware page table.
- @req_type: One of enum iommu_hwpt_data_type, defining the data type of all
the entries in the invalidation request array. It should suit
with the data_type passed per the allocation of the hwpt pointed
by @hwpt_id.
- @req_len: Length (in bytes) of a request entry in the request array
- @req_num: Input the number of cache invalidation requests in the array.
Output the number of requests successfully handled by kernel.
- @out_driver_error_code: Report a driver speicifc error code upon failure.
It's optional, driver has a choice to fill it or
not.
"specific"
Jason