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Date: Sat, 17 Nov 2012 12:54:46 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: [PATCH 3/8] add mem64_min/max control
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To: Yinghai Lu <yinghai@kernel.org>
Cc: Haren Myneni <hbabu@us.ibm.com>, Simon Horman <horms@verge.net.au>, kexec@lists.infradead.org, "Eric W. Biederman" <ebiederm@xmission.com>, Vivek Goyal <vgoyal@redhat.com>

On 11/17/2012 12:51 PM, Yinghai Lu wrote:
> On Sat, Nov 17, 2012 at 12:41 PM, H. Peter Anvin <hpa@zytor.com> wrote:
>> Sorry, with "real mode" are we talking about struct boot_params or the actual realmode trampoline?  The latter needs to be < 640K as a hw requirement.
>
> boot_params.
>
> when kexec bzImage64, kexec will copy that from bzImage file, and
> update it....and
> pass pointer to arch/x86/boot/compressed/head_64.c via %rsi
>

Right, that's fine, of course.

We should make sure there aren't any implicit 32-bit assumptions 
there... there really shouldn't need to be.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


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