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[Qemu-devel] Re: Extending virtio_console to support multiple ports
From: |
Rusty Russell |
Subject: |
[Qemu-devel] Re: Extending virtio_console to support multiple ports |
Date: |
Mon, 21 Sep 2009 14:50:45 +0930 |
User-agent: |
KMail/1.11.2 (Linux/2.6.28-15-generic; KDE/4.2.2; i686; ; ) |
On Tue, 1 Sep 2009 02:07:05 am Anthony Liguori wrote:
> Amit Shah wrote:
> Functionally speaking, both virtio-console and virtio-serial do the same
> thing. In fact, virtio-console is just a subset of virtio-serial.
>
> If there are problems converging the two drivers in Linux, then I
> suggest you have two separate driver modules in Linux. That would
> obviously be rejected for Linux though because you cannot have two
> drivers for the same device. Why should qemu have a different policy?
I've been on leave, cheerfully not thinking about this.
AFAICT, a console and serial are very similar, so it makes sense to merge
them. But a serial port doesn't have framing either; if it does, it's
something else.
And generally using virtio framing in upper layers is a mistake (one we've
made in the qemu implementations, but that's unfortunate).
Thanks,
Rusty.
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