External/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2025-03-20 07:58:55 +00:00
Code

docs: device_model: Updated the serial device doc

Browse Source 
As we switched the AArch64 serial device to PL011, we also need to
update the documentation.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang 2021-03-15 11:10:58 +08:00 committed by Michael
parent 9c3b489f0e
commit 06d83d2eb3
1 changed files with 7 additions and 3 deletions

10
docs/device_model.md

@ -28,9 +28,13 @@ This document describes the device model supported by `cloud-hypervisor`.
### Serial port ### Serial port
Simple emulation of a serial port by reading and writing to specific port I/O Simple emulation of a serial port by reading and writing to specific port I/O
addresses. Used as the default console for Linux when booting with the option addresses. The serial port can be very useful to gather early logs from the
`console=ttyS0`, the serial port can be very useful to gather early logs from operating system booted inside the VM.
the operating system booted inside the VM.
For x86_64, The default serial port is from an emulated 16550A device. It can
be used as the default console for Linux when booting with the option
`console=ttyS0`. For AArch64, the default serial port is from an emulated
PL011 UART device. The related command line for AArch64 is `console=ttyAMA0`.
This device is always built-in, and it is disabled by default. It can be This device is always built-in, and it is disabled by default. It can be
enabled with the `--serial` option, as long as its parameter is not `off`. enabled with the `--serial` option, as long as its parameter is not `off`.