> From: Nicolin Chen <nicolinc@xxxxxxxxxx> > Sent: Saturday, October 26, 2024 7:50 AM > > Now a vIOMMU holds a shareable nesting parent HWPT. So, it can act like > that nesting parent HWPT to allocate a nested HWPT. > > Support that in the IOMMU_HWPT_ALLOC ioctl handler, and update its kdoc. > > Also, add an iommufd_hwpt_nested_alloc_for_viommu helper to allocate a the helper name is not updated. > nested HWPT for a vIOMMU object. Since a vIOMMU object holds the parent > hwpt's refcount already, increase the refcount of the vIOMMU only. > > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
