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

From: Liu, Yi L yi.l.liu@intel.com Sent: Thursday, December 21, 2023 11:40 PM

From: Nicolin Chen nicolinc@nvidia.com

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@nvidia.com Co-developed-by: Yi Liu yi.l.liu@intel.com Signed-off-by: Yi Liu yi.l.liu@intel.com

Reviewed-by: Kevin Tian kevin.tian@intel.com