jlaitine opened a new pull request, #16853:
URL: https://github.com/apache/nuttx/pull/16853

   
   ## Summary
   
   In memory protected modes (CONFIG_BUILD_KERNEL / CONFIG_BUILD_PROTECTED), 
this maps the MTIME register with MMU to the userspace.
   
   This can be used as a performance optimization, while reading the MTIME 
register can be done directly without a syscall to the kernel or SBI.
   
   ## Impact
   
   No functional impact, allows performance optimization for memory protected 
builds, which need to access the MTIME.
   
   ## Testing
   
   Tested on custom MPFS250T hardware and on commercial Microchip Icicle board
   


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