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Re: [Qemu-devel] fw_cfg specification ?
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] fw_cfg specification ? |
Date: |
Wed, 11 Mar 2015 19:50:40 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 03/11/15 16:27, Gabriel L. Somlo wrote:
> Hi,
>
> I'm looking for the closest thing to an official spec for qemu's
> fw_cfg device, and so far I have found this:
>
> http://lists.gnu.org/archive/html/qemu-devel/2011-04/msg00238.html
>
> but it apparently never got committed to qemu (any idea why not?).
Must have fallen through the cracks. (Just speculating; in April 2011 I
had been with RH for less than half a year, and learning Xen. :))
> Googling around didn't get me much further than that.
>
> Is there anything better or more up to date floating around out
> there somewhere ?
I won't say "better", but it is "committed": check
"Documentation/devicetree/bindings/arm/fw-cfg.txt" in the kernel tree.
It is intentionally vague on the set of keys and fw_cfg files that qemu
provides, because that's a moving target. You can only rely on the qemu
source for those.
Also, I updated Gleb's email address in the CC: header.
If you have a ton of time, you could try documenting fw_cfg yourself,
but as I said, it's a moving target, so the description would either
become stale quickly, or require people to keep it in sync with the
source all the time. Updating documentation sucks *hard*.
(At one point I had also started a text file like Jordan's, but I didn't
even get as far as posting it anywhere; I just gave up.)
Thanks
Laszlo
- [Qemu-devel] fw_cfg specification ?, Gabriel L. Somlo, 2015/03/11
- Re: [Qemu-devel] fw_cfg specification ?,
Laszlo Ersek <=
- Re: [Qemu-devel] fw_cfg specification ?, Gabriel L. Somlo, 2015/03/11
- Re: [Qemu-devel] fw_cfg specification ?, Laszlo Ersek, 2015/03/11
- Re: [Qemu-devel] fw_cfg specification ?, Gerd Hoffmann, 2015/03/12
- Re: [Qemu-devel] fw_cfg specification ?, Paolo Bonzini, 2015/03/12
- Re: [Qemu-devel] fw_cfg specification ?, Laszlo Ersek, 2015/03/12
- Re: [Qemu-devel] fw_cfg specification ?, Gabriel L. Somlo, 2015/03/12
- Re: [Qemu-devel] fw_cfg specification ?, Paolo Bonzini, 2015/03/12