[TF-M] Calling an NSPE function from a secure partition

Hi,

Is it possible/allowed to call a function in NSPE from a secure partition using the GCC Cortex M Security Extensions (CMSE)? If NSPE and SPE are on different cores then it is definitely not working but in my case they are on the same M33 core.

If it is possible then I would like to call a semaphore P operation in the RTOS that might block. Will that work?

Regards, Jan.