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Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console
Date: Tue, 24 Nov 2009 13:25:34 -0600
User-agent: Thunderbird (X11/20090825)

Alexander Graf wrote:
On 24.11.2009, at 19:55, Anthony Liguori wrote:

Alexander Graf wrote:
On our S390x Virtio machine we don't have anywhere to display early printks
on, because we don't know about VGA or serial ports.

So instead we just forward everything to the virtio console that we created
What is this used for?

This is used for console output before virtio is initialized. I didn't invent 
it - that's the way it's implemented in the s390 kernels today.

I don't see any code that calls this function. Am I missing something obvious?



Anthony Liguori

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