vdev ser8250

Synopsis:

vdev ser8250 options

Options:

batch timeout

If specified, instead of writing one character at a time, the vdev batches output until the number of microseconds given 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), 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.

You can define multiple hostdev options, to specify separate input and output devices:

hostdev <myhostinputdevice
hostdev >myhostoutputdevice

Or, you can specify the same device for both input and output:

hostdev myhostdevice

intr intr

Signal intr for device interrupts.

loc addr

Set the base address of the device registers to addr. Default space is io:.

sched priority

Set the priority specified by priority for pulses indicating that input is available.

For a list of options available to all vdevs, see Common vdev options earlier in this chapter.

Description:

The ser8250 vdev emulates the Intel 8250 UART.