[PATCH] kexec:arm: support zImage with appended device tree

[Russell King]

On Tue, Jun 27, 2017 at 06:51:50PM +0900, Hoeun Ryu wrote:
> > What about the initrd?  Do you want to append that as well?
> 
> I have thought of it.
> I think It would be better to have it.
> But I think this is the first step to do so.

That is something we don't support with the kernel, and would be insane
to do so - it would mean that the very dumb decompressor would have
to relocate not only the dtb image, but also the initrd image to
some other part of memory.  It moves the appended dtb image along with
the rest of the zImage as one complete blob, but that doesn't work
so well for an appended initrd.  It will also be rather slow.

So I'd like to continue my discouragement of this entire approach and
say that kexec-tools should *not* add support for an appended DTB nor
an appended initrd.

The kernel build process gives you the kernel image and dtb file.
The appended-dtb image support that we have in the kernel is for
backwards compatibility with non-DT aware boot loaders that only
know how to deal with one or two images at boot time.

-- 
Russell King