linux-kernel - Re: EFI runtime-services on x86

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Message-ID: <20100803215346.GA4476@srcf.ucam.org>
Date:	Tue, 3 Aug 2010 22:53:46 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Huang Ying <ying.huang@...el.com>,
	"Tang, Feng" <feng.tang@...el.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: EFI runtime-services on x86_64

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@...f.ucam.org
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