* Why is virtio_console not a tty?
@ 2014-06-12 19:32 H. Peter Anvin
2014-06-13 1:06 ` Rusty Russell
0 siblings, 1 reply; 3+ messages in thread
From: H. Peter Anvin @ 2014-06-12 19:32 UTC (permalink / raw)
To: virtualization@lists.linux-foundation.org, Amit Shah,
Rusty Russell
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?
-hpa
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Why is virtio_console not a tty?
2014-06-12 19:32 Why is virtio_console not a tty? H. Peter Anvin
@ 2014-06-13 1:06 ` Rusty Russell
2014-06-13 1:26 ` H. Peter Anvin
0 siblings, 1 reply; 3+ messages in thread
From: Rusty Russell @ 2014-06-13 1:06 UTC (permalink / raw)
To: H. Peter Anvin, virtualization@lists.linux-foundation.org,
Amit Shah
"H. Peter Anvin" <hpa@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?
Cheers,
Rusty.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Why is virtio_console not a tty?
2014-06-13 1:06 ` Rusty Russell
@ 2014-06-13 1:26 ` H. Peter Anvin
0 siblings, 0 replies; 3+ messages in thread
From: H. Peter Anvin @ 2014-06-13 1:26 UTC (permalink / raw)
To: Rusty Russell, virtualization@lists.linux-foundation.org,
Amit Shah
On 06/12/2014 06:06 PM, Rusty Russell wrote:
> "H. Peter Anvin" <hpa@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
^ permalink raw reply [flat|nested] 3+ messages in thread
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