linux-kernel - Re: [PATCH] Fix e820 end address with EFI

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Date:	Sun, 1 Mar 2009 18:51:32 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Brian Maly <bmaly@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Fix e820 end address with EFI

On Sun, Mar 1, 2009 at 6:37 PM, Huang Ying <ying.huang@...el.com> wrote:
>> so 64bit could use ioremap_cache() too?
>> we may keep 32bit and 64bit a bit consistent.
>
> If we use ioremap_cache(), kexec runtime service will not work in kexec
> situation, which needs EFI runtime memory area to be mapped at exact
> same location across kexec. I think we should support kexec if possible.


sure.

please don't touch max_low_pfn_mapped, because some range may not
directly mapped under those efi run-time code

YH
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