RE: [PATCH v7 3/9] iommu: Add iommu_copy_struct_from_user_array helper

[Tian, Kevin]

> From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
> Sent: Thursday, December 21, 2023 11:40 PM
> 
> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> 
> Wrap up the data pointer/num sanity and __iommu_copy_struct_from_user
> call for iommu drivers to copy driver specific data at a specific location
> in the struct iommu_user_data_array, and
> iommu_respond_struct_to_user_array()
> to copy response to a specific location in the struct iommu_user_data_array.
> 
> And expect it to be used in cache_invalidate_user ops for example.
> 
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Co-developed-by: Yi Liu <yi.l.liu@xxxxxxxxx>
> Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>