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Date: Tue, 3 Aug 2010 22:53:46 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Huang Ying <ying.huang@intel.com>, "Tang, Feng" <feng.tang@intel.com>,
        Bjorn Helgaas <bjorn.helgaas@hp.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: EFI runtime-services on x86_64
Message-ID: <20100803215346.GA4476@srcf.ucam.org>
References: <201007301458.50263.bjorn.helgaas@hp.com> <20100802103535.6442ab49@feng-i7> <1280716920.2771.1519.camel@yhuang-dev> <m14ofbgyki.fsf@fess.ebiederm.org>
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On Tue, Aug 03, 2010 at 02:45:33PM -0700, Eric W. Biederman wrote:

> EFI runtime calls have the nasty fact that they don't work in general even
> if EFI is present because you may have the wrong word size EFI running on
> your machine.  A 32bit EFI and a 64bit kernel or a 64bit EFI and a 32bit kernel.

You've already failed to boot in that case.

-- 
Matthew Garrett | mjg59@srcf.ucam.org