panic: Read from i8237 channel 0 current address unimplemented.

I get the above panic while trying to boot x86_64 8 CPUs. Anyone have
some advice on how I might work around it? Can I disable this device,
or can the unimplemented functionality be easily enough implemented?

Prior to the panic, there are also some instructions reported as
unimplemented. Hopefully none of them are problematic, but here is the
list:
warn: instruction 'wbinvd' unimplemented
warn: instruction 'fxsave' unimplemented
warn: instruction 'wbinvd' unimplemented
warn: instruction 'daa' unimplemented
warn: instruction 'pop_ES' unimplemented
warn: instruction 'push_ES' unimplemented
warn: instruction 'push_CS' unimplemented
warn: instruction 'sldt_Mw_or_Rv' unimplemented
warn: instruction 'push_SS' unimplemented
warn: instruction 'pop_SS' unimplemented
warn: instruction 'push_DS' unimplemented
warn: instruction 'pop_DS' unimplemented
warn: instruction 'das' unimplemented
warn: instruction 'aaa' unimplemented
warn: instruction 'aas' unimplemented
warn: instruction 'ret_far_Iw' unimplemented

-Gedare
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