[PATCH v5 08/13] iommufd/selftest: Add mock_viommu_cache_invalidate

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Saturday, October 26, 2024 7:51 AM
> 
> Similar to the coverage of cache_invalidate_user for iotlb invalidation,
> add a device cache and a viommu_cache_invalidate function to test it out.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

Reviewed-by: Kevin Tian <kevin.tian at intel.com>