From: "Arend van Spriel" Subject: Re: access efi variables Date: Sat, 14 Sep 2013 19:01:19 +0200 Message-ID: <5234965F.3050404@broadcom.com> References: <52333139.6020203@broadcom.com> <5233939B.3020401@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5233939B.3020401-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "H. Peter Anvin" Cc: Matt Fleming , linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-efi@vger.kernel.org On 09/14/13 00:37, H. Peter Anvin wrote: > On 09/13/2013 08:37 AM, 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: >> >> But according to the specs the variable I need to obtain is 2k bytes. >> Should I expect trouble :-p >> > > efivarfs doesn't have those limitations. Thanks, Peter Looking into efivarfs it seems to use the functions that I looked at in efi.h so I guess I am misinterpreting the 1024 bytes limitation in the comment (either that or you are mistaken ;-) ). I need to access the variable from within a device driver so using efivarfs does not feel like the way to go here. Regards, Arend