[PATCH v3 5/5] iommu/vt-d: Convert nested cache invalidation to the core array loop

[Baolu Lu]

On 7/9/26 03:44, Nicolin Chen wrote:
> intel_nested_cache_invalidate_user() used to walk the whole request array
> on its own, copying and then flushing one single entry at a time.
> 
> The iommufd core now iterates the request array itself and re-invokes the
> op with the not-yet-handled sub-array, so handle just a single request per
> call out of the front of that sub-array and report one handled entry via
> the array->entry_num. An empty array keeps returning a success, used as a
> probe of IOMMU_HWPT_INVALIDATE_DATA_VTD_S1 support.
> 
> Reviewed-by: Kevin Tian<kevin.tian at intel.com>
> Assisted-by:Claude:claude-opus-4-8
> Signed-off-by: Nicolin Chen<nicolinc at nvidia.com>
> ---
>   drivers/iommu/intel/nested.c | 54 ++++++++++++++++++++----------------
>   1 file changed, 30 insertions(+), 24 deletions(-)

Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>