btw sharing this from Zulip:

> Tamme Dittrich and I have been working on the final items for the ARM TrustZone cmse calling conventions.
We believe that C-cmse-nonsecure-call is now ready for stabilization, and have written a stabilization report
> 
> https://github.com/rust-lang/rust/issues/81391#issuecomment-2258346708
> 
> We've already discussed this at the last embedded meetup, and as far as we're aware there are no remaining concerns.

https://rust-lang.zulipchat.com/#narrow/stream/436762-wg-embedded/topic/stabilizing.20.60C-cmse-nonsecure-call.60/near/455124815