Message-ID: <491B6855.1080609@kernel.org>
Date: Wed, 12 Nov 2008 15:35:49 -0800
From: "H. Peter Anvin" <hpa@kernel.org>
Organization: Linux Kernel Organization, Inc.
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To: Bernhard Walle <bwalle@suse.de>
CC: x86@kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org
Subject: Re: [PATCH] Always use 64 bit addresses for the firmware memory map
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Bernhard Walle wrote:
> * H. Peter Anvin [2008-11-12 11:59]:
>> I want to make sure, though, that we don't just end up pushing the
>> truncation further down in the code.
> 
> Well, I think that interface should export the BIOS memmap as provided.
> Since E820 does provide 64 bit addresses, that should get exported.
> 
> It should even possible to kexec a PAE kernel from a non PAE kernel ...
> I didn't test, but it could work. But only if the E820 map is correctly
> written in the zero page, which is only the case if we get it correctly.
> 

That's fine, but we do have to check that we don't truncate elsewhere.

	-hpa
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