From: Andi Kleen <ak@suse.de>
To: "Huang, Ying" <ying.huang@intel.com>
Subject: Re: [PATCH 5/5] x86_64 EFI support -v3: EFI document
Date: Wed, 8 Aug 2007 12:08:00 +0200
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Cc: "Eric W. Biederman" <ebiederm@xmission.com>, akpm@linux-foundation.org,
       Yinghai Lu <yhlu.kernel@gmail.com>,
       Randy Dunlap <randy.dunlap@oracle.com>,
       Chandramouli Narayanan <mouli@linux.intel.com>,
       linux-kernel@vger.kernel.org
References: <1185851583.23149.30.camel@caritas-dev.intel.com> <200708071154.23150.ak@suse.de> <1186561082.4430.63.camel@caritas-dev.intel.com>
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> The needed code changing is minimal. In fact, I can boot 32bit Linux
> kernel on my x86_64 EFI machine. With setup as follow:
>
> 1. Apply the efi-fb.patch
Just for the frame buffer, right?

> 2. make efi fb driver not depend on EFI
> 3. configure kernel as follow:
>    a. CONFIG_EFI is turned off
>    b. CONFIG_FB_EFI is turned on

Hmm, how does the 32bit kernel know where the e820 map is passed then?
With CONFIG_EFI turned off it will just ask the real mode BIOS I think
and I doubt elilo simulates that.

Or did you apply more patches?

-Andi
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