Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32MG12P/EFR32MG12P433F1024GL125/ETM/ETMCIDR1#0x0
Component ID1 Register
CoreSight Preamble
https://github.com/cmsis-svd/cmsis-svd-data