Hi Rob, Thanks for the review.
I will remove the obsolete GPL boilerplate and retain only the SPDX identifier and copyright notice. I also understand the broader concern about exposing implementation-defined controls through a userspace ABI. I will hold v2 until the arm64 maintainers provide direction rather than continuing to refine an interface they may not accept. If the preferred direction is a different abstraction—or no userspace interface—I will rework or withdraw the RFC accordingly. Thanks, Koba
