linux-kernel - Re: Who uses kexec preserve context logic

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Message-ID: <51A3027B.9090708@cn.fujitsu.com>
Date:	Mon, 27 May 2013 14:51:39 +0800
From:	Zhang Yanfei <zhangyanfei@...fujitsu.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	Huang Ying <ying.huang@...el.com>
Subject: Re: Who uses kexec preserve context logic

On 10/23/2012 02:55 AM, Vivek Goyal wrote:
> Hi,
> 
> I am just curious to know if somebody uses kexec preserve context path. I 
> have never used it personally and I don't know anybody who makes use of it.
> 
> Is it an unused code and should it be ripped out?
> 

Hi Vivek,

Related commit is:

3ab83521378268044a448113c6aa9a9e245f4d2f kexec jump

>From the commit, we can see its purpose is:

"The features of this patch can be used as a general method to call program in
physical mode (paging turning off).  This can be used to call BIOS code under
Linux."

Maybe someone from Intel still uses this...
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