From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755823Ab2IOCbl (ORCPT ); Fri, 14 Sep 2012 22:31:41 -0400 Received: from smtp.nue.novell.com ([195.135.221.5]:60503 "EHLO smtp.nue.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754534Ab2IOCbj (ORCPT ); Fri, 14 Sep 2012 22:31:39 -0400 Subject: Re: [RFC,PATCH v2] efi: Add support for a UEFI variable filesystem From: joeyli To: jeremy.kerr@canonical.com Cc: linux-kernel@vger.kernel.org, Matthew Garrett , "H. Peter Anvin" , Matt Domsch , Peter Jones , jlee@suse.com, jeremy.kerr@canonical.com In-Reply-To: References: <1346910035.47691.188651047712.1.gpush@pecola> Content-Type: text/plain; charset="UTF-8" Date: Sat, 15 Sep 2012 10:26:23 +0800 Message-ID: <1347675983.705.54.camel@linux-s257.site> Mime-Version: 1.0 X-Mailer: Evolution 2.28.2 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 於 二，2012-09-11 於 15:23 +0800，lee joey 提到： > From: Matthew Garrett > > 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 . > > Signed-off-by: Matthew Garrett > Signed-off-by: Jeremy Kerr I and Gary tested create, update, delete unauthenticated variable, works fine. Tested-by: Lee, Chun-Yi Thanks a lot! Joey Lee