Why is virtio_console not a tty?

H. Peter Anvin
Fri, 13 Jun 2014 01:26:53 -0000

On 06/12/2014 06:06 PM, Rusty Russell wrote:
> "H. Peter Anvin" <hpa at zytor.com> writes:
>> I have gotten scattered reports of strange problems caused by the fact
>> that virtio_console doesn't behave like a normal tty (support
termios
>> and so on.)  This seems to be an odd restriction -- is there any
>> fundamental reason for this design choice?
>
> Not that I know.  I tacked it into hvc_console which provided the glue
> to make it a console.  Avoided me digging into console implementation,
> which is pretty horrible.
>
> Given my ignorance, how much change do we need to make it behave like a
> TTY?
>

hvc_console.c seems to set up a tty subsystem, so that is really
confusing...

	-hpa