linux-kernel - [PATCH v4 0/5] [RESEND] x86: efi: cleanups and basic 32/64-bit support

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Message-Id: <1328660732-27263-1-git-send-email-olof@lixom.net>
Date:	Tue,  7 Feb 2012 16:25:27 -0800
From:	Olof Johansson <olof@...om.net>
To:	x86@...nel.org, hpa@...or.com, mingo@...e.hu, tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org, matt.fleming@...el.com,
	mjg@...hat.com
Subject: [PATCH v4 0/5] [RESEND] x86: efi: cleanups and basic 32/64-bit support

This series allows basic booting of a 32-bit kernel on 64-bit EFI and vice
versa.  It's needed by Chrome OS, and we've been carrying a nasty hack
to do it that I've cleaned up and made sure it works in both directions.

Tested on Chrome OS for 64-bit EFI 32-bit kernel. Tested with an old
MacBook for 32-bit EFI, 64-bit kernel.

Note that this is required, but not sufficient, for full platform support for
EFI in a mixed environment. There is no handling of runtime services, and no
thunking for going in and out of firmware in a different mode.

Resend of the last posted version. Acked by Matt, and Matthew seems to be OK
with it as well (see http://marc.info/?l=linux-kernel&m=132578786105542).

Please consider for 3.4 merge window. Thanks!

-Olof

Changelog is:                                                                                                               
v4:
* Removed bogus memdesc warning printout
* Fixed up printk formatting, removing redundant EFI output
* Some of the earlier cleanup was accidentally reverted by this patch, fixed.                                                                      
* Reworded some messages to not have to line wrap printk strings  

v3:                                                                                                                                                
* Reorganized to a series of patches to make it easier to review, and                                                                              
  do some of the cleanups I had left out before.                                                                                                   

v2:                                                                                                                                                
* Added graceful error handling for 32-bit kernel that gets passed                                                                                 
EFI data above 4GB.                                                                                                                              
* Removed some warnings that were missed in first version.                                                                                         

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