linux-kernel - Re: [RFC,PATCH v2] efi: Add support for a UEFI variable filesystem

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Message-ID: <1347675983.705.54.camel@linux-s257.site>
Date:	Sat, 15 Sep 2012 10:26:23 +0800
From:	joeyli <jlee@...e.com>
To:	jeremy.kerr@...onical.com
Cc:	linux-kernel@...r.kernel.org, Matthew Garrett <mjg@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Matt Domsch <Matt_Domsch@...l.com>,
	Peter Jones <pjones@...hat.com>, jlee@...e.com,
	jeremy.kerr@...onical.com
Subject: Re: [RFC,PATCH v2] efi: Add support for a UEFI variable filesystem

於 二，2012-09-11 於 15:23 +0800，lee joey 提到：
> From: Matthew Garrett <mjg@...hat.com>
> 
> The existing EFI variables code only supports variables of up to 1024
> bytes. This limitation existed in version 0.99 of the EFI
> specification,
> but was removed before any full releases. Since variables can now be
> larger than a single page, sysfs isn't the best interface for this.
> So,
> instead, let's add a filesystem. Variables can be read, written and
> created, with the first 4 bytes of each variable representing its UEFI
> attributes. The create() method doesn't actually commit to flash since
> zero-length variables can't exist per-spec.
> 
> Updates from Jeremy Kerr <jeremy.kerr@...onical.com>.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> Signed-off-by: Jeremy Kerr <jeremy.kerr@...onical.com> 

I and Gary tested create, update, delete unauthenticated variable, works
fine.

Tested-by: Lee, Chun-Yi <jlee@...e.com>


Thanks a lot!
Joey Lee

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