[PATCH v5 10/13] iommufd/selftest: Add vIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Saturday, October 26, 2024 7:51 AM
> 
> Add a viommu_cache test function to cover vIOMMU invalidations using the
> updated IOMMU_HWPT_INVALIDATE ioctl, which now allows passing in a
> vIOMMU
> via its hwpt_id field.
> 
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

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