linux-kernel - Re: [PATCH]x86_64: build and use GDT on copied compressed kernel

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Date:	Sun, 13 May 2007 13:49:02 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	"Andi Kleen" <ak@...e.de>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Vivek Goyal" <vgoyal@...ibm.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH]x86_64: build and use GDT on copied compressed kernel

"Yinghai Lu" <yhlu.kernel@...il.com> writes:

> Eric,
>
> I got one question about kexec and bzImage on 64bit kernel.
>
> The bzImage for 64bit kernel must be loaded under 4G?
> but vmlinux for 64bit kernel could be loaded above 4G.
>
> So is there any plan to use 64bit entry point (startup_64) in
> arch/x86_64/boot/compressed/vmlinux in bzImage? so you may
> load bzImage above 4G too.

We have big boot protocol revision coming up to more clearly document
what is needed to work with the native entry points.  It is a 2.6.23
targeted thing and that is one of the things that we are likely to
look at.

Eric
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