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LP-AM261: LP-AM261 Secure Boot related

Part Number: LP-AM261


Tool/software:

Hello,

After making my device as HSSE, iam usually using signing my SBL using DBG_PUBLIC_ENABLE as debug level to keep the debug functionality open, 

If I use DBG_PERM_DISABLE option instead of this, my understanding is that it will close the debug functionality, but my confusion is whether it will close my debug option for ever or is it till I flash a new SBL with DBG_PUBLIC_ENABLE?  

If it does not close that, what is the recommended method to permanently disable debug by blowing the dedicated efuse ?

does my HSMrt have capability to do this or only the keywriter setup is allowed to blow the fuse?