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DOC: add --pm_by_vuart setting guide.

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new params: --pm_by_vuart is used to set power mananger by vuart
on ACRN; so add it to user guide.

Tracked-On: #3564
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
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Minggui Cao 2019-09-10 16:52:19 +08:00 committed by ACRN System Integration
parent 3d23c90a8e
commit f41f9307cc
1 changed files with 19 additions and 1 deletions
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20
doc/user-guides/acrn-dm-parameters.rst
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@ -331,9 +331,27 @@ Here are descriptions for each of these ``acrn-dm`` command line parameters:
- This option is used to define which channel could be used DM to - This option is used to define which channel could be used DM to
communicate with VM about power management event. communicate with VM about power management event.
ACRN supports two channels: ``ioc`` and ``power button``. ACRN supports three channels: ``ioc``, ``power button`` and ``uart``.
usage:: usage::
--pm_notify_channel ioc --pm_notify_channel ioc
Use ioc as power management event motify channel. Use ioc as power management event motify channel.
* - :kbd:`--pm_by_vuart [pty|tty],<node_path>`
- This option is used to set a user OS power management by virtual UART.
With acrn-dm UART emulation and hypervisor UART emulation and configure,
service OS can communicate with user OS through virtual UART. By this
option, service OS can notify user OS to shutdown itself by vUART.
It need work with `--pm_notify_channel` and PCI UART setting (lpc and -l).
Example::
for general UOS, like LaaG or WaaG, it need set:
--pm_notify_channel uart --pm_by_vuart pty,/run/acrn/life_mngr_vm1
-l com2,/run/acrn/life_mngr_vm1
for RTVM, like RT-Linux:
--pm_notify_channel uart --pm_by_vuart tty,/dev/ttyS1
For different UOS, it can be configured as needed.