linux-kernel - Re: [PATCH 13/20] x86_64: 64bit PIC ACPI wakeup trampoline

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Date:	Sat, 18 Nov 2006 01:20:41 +0100
From:	Pavel Machek <pavel@....cz>
To:	Vivek Goyal <vgoyal@...ibm.com>
Cc:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Reloc Kernel List <fastboot@...ts.osdl.org>,
	ebiederm@...ssion.com, akpm@...l.org, ak@...e.de, hpa@...or.com,
	magnus.damm@...il.com, lwang@...hat.com, dzickus@...hat.com,
	rjw@...k.pl
Subject: Re: [PATCH 13/20] x86_64: 64bit PIC ACPI wakeup trampoline

On Fri 2006-11-17 17:51:03, Vivek Goyal wrote:
> 
> 
> o Moved wakeup_level4_pgt into the wakeup routine so we can
>   run the kernel above 4G.
> 
> o Now we first go to 64bit mode and continue to run from trampoline and
>   then then start accessing kernel symbols and restore processor context.
>   This enables us to resume even in relocatable kernel context when 
>   kernel might not be loaded at physical addr it has been compiled for.
> 
> o Removed the need for modifying any existing kernel page table.
> 
> o Increased the size of the wakeup routine to 8K. This is required as
>   wake page tables are on trampoline itself and they got to be at 4K
>   boundary, hence one page is not sufficient.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
> Signed-off-by: Vivek Goyal <vgoyal@...ibm.com>

Looks okay to me, ACK.
							Pavel

-- 
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