linux-kernel - Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage

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Message-ID: <4636D017.5060108@zytor.com>
Date:	Mon, 30 Apr 2007 22:28:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jeff Garzik <jeff@...zik.org>, Andi Kleen <ak@...e.de>,
	patches@...-64.org, Vivek Goyal <vgoyal@...ibm.com>,
	linux-kernel@...r.kernel.org,
	virtualization <virtualization@...ts.linux-foundation.org>
Subject: Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for
 relocatable bzImage

Rusty Russell wrote:
> 
> BTW, wrt. a new "platform type" field, should it go something like this?
> 
> -0235/3	N/A	pad2		Unused
> +0235/1	2.07+	platform_type	Runtime platform (see below)
> +0236/2	N/A	pad2		Unused
> ...
> +  platform_type:
> +	For kernels which can boot on multiple platforms.  Currently
> +	0 == native (normal), 1 == lguest (paravirtualized).
> 

Well, yes, but we need to think about if there is more things that
should be added.  There *definitely* should be space for a platform data
pointer, to start out with.  I would also like to see a platform data
field, as well as a bootloader extension field (we're going to have that
problem soon enough.)

	-hpa
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