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Date: Fri, 14 Aug 2009 11:25:32 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] Re: virtio-serial: An interface for
	host-guest	communication
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Amit Shah <amit.shah@redhat.com>, Rusty Russell <rusty@rustcorp.com.au>, qemu-devel@nongnu.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org

Gerd Hoffmann wrote:
> On 08/14/09 10:15, Amit Shah wrote:
>> The guest code sort-of ends up looking like this after merging
>> virtio_console into virtio_serial.
>
> I think it should better go the other way around: add multichannel 
> support to virtio-concole, probably guarded by a feature flag so old 
> host+new guest and new host+old guest combinations continue to work.
>
>> Since there's support for only one console as of now, I've assigned port
>> #2 as the console port so that we hook into hvc when a port is found at
>> that location.
>
> Doesn't sound like this is going to be backward compatible ...
>
> Also I still think passing a 'protocol' string for each port is a good 
> idea, so you can stick that into a sysfs file for guests use.

Or drops ports altogether and just use protocol strings...

Regards,

Anthony Liguori