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Date:	Fri, 26 Oct 2007 09:28:47 +0800
From:	"Huang, Ying" <>
To:	"Eric W. Biederman" <>
Cc:	Arjan van de Ven <>,
	Thomas Gleixner <>,
	Andrew Morton <>,
	"H. Peter Anvin" <>, Ingo Molnar <>,
	Andi Kleen <>,
	Chandramouli Narayanan <>,
	LKML <>,
Subject: Re: [PATCH 1/3 -v4] x86_64 EFI runtime service support: EFI basic
	runtime service support

On Thu, 2007-10-25 at 11:06 -0600, Eric W. Biederman wrote:
> Arjan van de Ven <> writes:
> > On Thu, 25 Oct 2007 10:55:44 -0600
> > (Eric W. Biederman) wrote:
> >
> >> I don't think there is a compelling case for us to use any efi
> >> services at this time
> >
> > I would almost agree with this if it wasn't for the 1 call that OS
> > installers need to tell EFI about bootloader stuff; I've cc'd Peter
> > Jones since he'll know better what OS installers need; if they don't
> > need it after all...
> Yes.  I think that is usage of the variable service.  Although
> I don't know if that is actually needed.
> Support for the variable service is not implemented in this
> patchset.

Support for the variable service has been implemented in this patchset.
The interfaces are:


And a sysfs interface (/sys/firmware/efi/vars) is provided in
drivers/firmware/efivars.c, which depends on this patchset to work.

Best Regards,
Huang Ying
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