- https://developer.arm.com/documentation/109697/2025_06/Feature-descriptions/The-Armv8-9-architecture-extension
- https://gist.github.com/dougallj/7a75a3be1ec69ca550e7c36dc75e0d6f
- https://www.corsix.org/content/arm-cssc
NOTE: known example in iPhone18,1 kernel at addr
0xfffffe0008370cc0