From: Olof Johansson <olof@lixom.net>
To: x86@kernel.org, hpa@zytor.com, mingo@elte.hu, tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, matt.fleming@intel.com, mjg@redhat.com
Subject: [PATCH v4 0/5] [RESEND] x86: efi: cleanups and basic 32/64-bit support
Date: Tue, 7 Feb 2012 16:25:27 -0800 [thread overview]
Message-ID: <1328660732-27263-1-git-send-email-olof@lixom.net> (raw)
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.
next reply other threads:[~2012-02-08 0:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 0:25 Olof Johansson [this message]
2012-02-08 0:25 ` [PATCH 1/5] x86: efi: refactor efi_init() a bit Olof Johansson
2012-02-08 0:25 ` [PATCH 2/5] x86: efi: convert printk to pr_*() Olof Johansson
2012-02-08 0:25 ` [PATCH 3/5] x86: efi: cleanup config table walking Olof Johansson
2012-02-08 0:25 ` [PATCH 4/5] x86: efi: add basic error handling Olof Johansson
2012-02-08 0:25 ` [PATCH 5/5] x86: efi: allow basic init with mixed 32/64-bit efi/kernel Olof Johansson
2012-02-08 18:31 ` Matt Fleming
2012-02-08 18:54 ` Olof Johansson
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