raiden00pl opened a new pull request, #9700:
URL: https://github.com/apache/nuttx/pull/9700

   ## Summary
   - arch/armv8-m/arm_secure_irq.c: fix writing to the NVIC_AIRCR register
   Register key (VECTKEY) must be written, otherwise the write is ignored.
   Reference:
   
https://developer.arm.com/documentation/100235/0004/the-cortex-m33-peripherals/system-control-block/application-interrupt-and-reset-control-register
   
   ## Impact
   `up_secure_irq_all(false)` set `NVIC_AIRCR_BFHFNMINS` as expected
   
   ## Testing
   nrf9160: secure bootloader (mcuboot + nuttx) booting to non-secure 
application
   


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