doc: add missing 'mmio@' description to hypervisor parameters
Add the 'mmio@' parameter to the document describing all the possible
values for 'uart='. This is the command-line argument passed to the
hypervisor in order to overwrite and/or set the serial port.
@@ -13,9 +13,11 @@ The ACRN hypervisor supports the following parameter:
+=================+=============================+========================================================================================+
| | disabled | This disables the serial port completely. |
| +-----------------------------+----------------------------------------------------------------------------------------+
-| ``uart=`` | bdf@<BDF value> | This sets the PCI serial port based on its BDF. e.g. ``bdf@0:18.1`` |
+| ``uart=`` | bdf@<BDF value> | This sets the serial port PCI BDF, e.g. ``bdf@0:18.1`` |
| +-----------------------------+----------------------------------------------------------------------------------------+
-| | port@<port address> | This sets the serial port address. |
+| | port@<port address> | This sets the serial port PIO address, e.g. ``uart=port@0x3F8`` |
+| +-----------------------------+----------------------------------------------------------------------------------------+
+| | mmio@<MMIO address> | This sets the serial port MMIO address, e.g. ``uart=mmio@0xfe040000`` |
+-----------------+-----------------------------+----------------------------------------------------------------------------------------+
The Generic hypervisor parameters are specified in the GRUB multiboot/multiboot2 command.
