doc: update document for "--acpidev_pt" and "--mmiodev_pt" features
Add guild how to add ACPI device and MMIO device passthrough support through
the cmdline.
@@ -276,6 +276,31 @@ Here are descriptions for each of these ``acrn-dm`` command line parameters:
enable virtio poll mode with poll interval 1ms.
+ * - :kbd:`--acpidev_pt <HID>`
+ - This option is to enable ACPI device passthrough support. The ``HID`` is a
+ mandatory parameter for this option which is the Hardware ID of the ACPI
+ device.
+
+ Example::
+
+ --acpidev_pt MSFT0101
+
+ To pass through a TPM (which HID is MSFT0101) ACPI device to a User VM.
+
+ * - :kbd:`--mmiodev_pt <MMIO_Region>`
+ - This option is to enable MMIO device passthrough support. The ``MMIO_Region``
+ is a mandatory parameter for this option which is the MMIO resource of the
+ MMIO device. The ``MMIO_Region`` needs to be the base address followed by
+ the length of the region, both separated by a comma.
+
+ Example::
+
+ --mmiodev_pt 0xFED40000,0x00005000
+
+ To pass through a MMIO device to a User VM. The MMIO device has a MMIO region.
+ The base address of this region is 0xFED40000 and the size of the region
+ is 0x00005000.
+
* - :kbd:`--vtpm2 <sock_path>`
- This option is to enable virtual TPM support. The sock_path is a mandatory
parameter for this option which is the path of swtpm socket fd.
