chipsec.utilcmd.mm_msgbus_cmd module

>>> chipsec_util mm_msgbus read     <port> <register>
>>> chipsec_util mm_msgbus write    <port> <register> <value>
>>>
>>> <port>    : message bus port of the target unit
>>> <register>: message bus register/offset in the target unit port
>>> <value>   : value to be written to the message bus register/offset

Examples:

>>> chipsec_util mm_msgbus read  0x3 0x2E
>>> chipsec_util msgbus mm_write 0x3 0x27 0xE0000001