Maybe? Say one processor is an aarch64 core and another is x64, but someone has put them on the same memory subsystem and the system as a whole tends to die if

Maybe? Say one processor is an aarch64 core and another is x64, but someone has put them on the same memory subsystem and the system as a whole tends to die if either falls over. And then you want to make a function call from one to the other - it isn't as remote as another machine, but you can't pass things in registers either. "Remote" call seems a reasonable description to use for that but as the semantics are indeed different perhaps a new term should be used.