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Re: [Qemu-devel] [PATCH 0 of 4] Add virtio-console support to qemu

From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH 0 of 4] Add virtio-console support to qemu
Date: Tue, 13 Jan 2009 22:58:50 +0200
User-agent: Thunderbird (X11/20090105)

Christian Borntraeger wrote:
What is the advantage of virtio-console, compared to the standard serial port?

I cannot talk about the qemu version, but looking at kuli (the experimental kvm userspace for s390) these things come into my mind:

- it is not limited to to serial speed settings (9600..115200 etc.)

Neither is the emulated serial port :)

- the kernel driver of virtio_console has console resizing support. Adding resize support into qemu should be an easy addon patch, it was quite easy in kuli. This would be really cool. Running kvm with nographic and virtio console on stdio would allow vim or mc to get notifications about resizes of the underlying console - like running native.

That's good to have, certainly.

- will work on platforms without a serial port (like s390)

I'm looking forward to the emulated punch card device.

Maybe we can also use this to move existing lguest guests into kvm

Won't work due to lguest's abilessness.

Do not meddle in the internals of kernels, for they are subtle and quick to 

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