[PATCH 0/2] Early printk support for virtio console devices.

[Peter Maydell]

On 7 May 2013 05:46, Rusty Russell <rusty at rustcorp.com.au> wrote:
> Peter Maydell <peter.maydell at linaro.org> writes:
>> That all looks like sensible QEMU implementation possibilities
>> but it seems to be a bit of a non-sequitur from "how do we
>> tell the kernel to actually use this?"
>
> You enable the feature in the virtio console device, and a kernel
> compiled with EARLY_PRINTK will use it?

Well, at the moment EARLY_PRINTK is hardcoded to
"use some specific UART or equivalent selected at
compile time". So the equivalent presumably would
be to hard-compile "use virtio-console", but then
how does that code know where the virtio-console
is in the address space?

-- PMM