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Date: Fri, 12 Jun 2009 19:35:16 +0300
Message-ID: <f43fc5580906120935l7be86216kd15709ae57e38519@mail.gmail.com>
Subject: Re: [Qemu-devel] [PATCH 0/4] Machine config files
From: Blue Swirl <blauwirbel@gmail.com>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Kevin Wolf <mail@kevin-wolf.de>, Markus Armbruster <armbru@redhat.com>, qemu-devel@nongnu.org

On 6/12/09, Anthony Liguori <anthony@codemonkey.ws> wrote:
> Kevin Wolf wrote:
>
> > Markus Armbruster schrieb:
> >  Don't get me wrong, I'm not against configuration files. Having them is
> > great and probably I'd even find some uses for them occasionally. I just
> > don't want to be _forced_ to use them which I fear is what Paul is
> > talking about.
> >
> >
>
>  What we need is a command line option that can be used to manipulate a
> device tree.  All of the existing options could then be implemented in terms
> of the former option.
>
>  There will probably be a lot of things in the future that you can only do
> via device tree manipulation.  I don't see any reason why not to add
> convenient syntax though for the most common things.

-fdt_change /cpus/cpu@0/clock-frequency 0x20000000
-fdt_delete /plb/obp/serial@ef600400
-fdt_add /plb/obp/serial@ef600500 serial (this is complicated)

But I fear we would be replicating basic awk functionality.

An external tool for manipulating the tree may still be useful.