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> Just because we wrote 8 in the MMU mode, we don't quite have the MMU turned on. The reason is because we're in CPU mode #3, which is the machine mode. So, we need to switch to "supervisor"

I'd encourage him to start in Supervisor mode instead and use one of the standard bootloaders (bbl or openSBI) to deal with machine mode. This would be compatible with Linux and be more portable as different platforms will supply platform specific boot loaders.



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