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Date: Thu, 28 Feb 2013 20:31:36 +0000
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: Chris Friesen <chris.friesen@genband.com>,
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Subject: Re: [GIT PULL] Load keys from signed PE binaries
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On Thu, Feb 28, 2013 at 09:23:45PM +0100, Florian Weimer wrote:
> * Matthew Garrett:
> > grub's running before ExitBootServices(), because otherwise it has no 
> > way to actually read anything off disk. Or draw to the screen.
> 
> Sorry, if Linux can read from the disk after ExitBootServices(), so
> can a boot loader.  Actually, we could boot Linux directly, with an
> initrd which contains a boot selector, and use kexec if the chosen
> kernel doesn't match the initial one.

"A bootloader" might be able to. grub can't.

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