From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752359Ab3IMQjj (ORCPT ); Fri, 13 Sep 2013 12:39:39 -0400 Received: from mms3.broadcom.com ([216.31.210.19]:1672 "EHLO mms3.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750951Ab3IMQji (ORCPT ); Fri, 13 Sep 2013 12:39:38 -0400 X-Server-Uuid: B86B6450-0931-4310-942E-F00ED04CA7AF Message-ID: <52333FBE.2080206@broadcom.com> Date: Fri, 13 Sep 2013 18:39:26 +0200 From: "Arend van Spriel" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130803 Thunderbird/17.0.8 MIME-Version: 1.0 To: "Matt Fleming" cc: linux-efi@vger.kernel.org, "linux-kernel@vger.kernel.org" Subject: Re: access efi variables References: <52333139.6020203@broadcom.com> In-Reply-To: <52333139.6020203@broadcom.com> X-WSS-ID: 7E2DE2C02L884432311-01-01 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/13/2013 05:37 PM, Arend van Spriel wrote: > I need to obtain a uefi variable so I went looking at the API in > include/linux/efi.h. I found the following definition: > > /* > * The maximum size of VariableName + Data = 1024 > * Therefore, it's reasonable to save that much > * space in each part of the structure, > * and we use a page for reading/writing. > */ > > struct efi_variable { > efi_char16_t VariableName[1024/sizeof(efi_char16_t)]; > efi_guid_t VendorGuid; > unsigned long DataSize; > __u8 Data[1024]; > efi_status_t Status; > __u32 Attributes; > } __attribute__((packed)); > > But according to the specs the variable I need to obtain is 2k bytes. Maybe clarify that "the specs" is basically the feature information I received internally here. > Should I expect trouble :-p > > Regards, > Arend > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >