Emulate a PL011 serial device
Synopsis:
vdev pl011 [batch timeout] [delayed seconds|forever] hostdev [<|>]host_device_name
[sched priority]
Options:
- batch timeout
- If specified, instead of writing one character at a time, the vdev batches
output until the number of microseconds specifed by
timeout has passed with no new characters coming
in.
- delayed
seconds|forever
- If specified, delay opening the device in the host until it is first
referenced by the guest.
- If the device isn't found in the host, continue trying for the number of
seconds specified by seconds before timing out (e.g.,
delayed 5). If seconds is set to
0 (i.e., delayed 0), try only once to
find the device on the host. If the argument is set to “forever” (i.e.,
delayed forever), never time out, just keep trying to
find the device on the host.
- hostdev [<|>]host_device_name
- Use the host_device_name as the source and/or destination
of characters to the device.
- You can use one of < (input) or >
(output) in a hostdev option, so the host device specified
by host_device_name provides input or receives output.
If you specify neither < nor >,
the device is used for both input and output.
Multiple
hostdev options are allowed. The most common
usage is to specify separate devices for input and output, as follows:
hostdev <myhostinputdevice
hostdev >myhostoutputdevice
Or, you can specify the same device for both input and output:
hostdev myhostdevice
- sched priority
- Send pulses indicating available input on the host device with a priority
level of priority.
For a list of options available to all vdevs, see “Common vdev options” at the beginning of this
chapter.
Description:
ARM only. The pl011 vdev emulates a PL011 serial device.