linux-kernel - Re: 2.6.39.1 immediately reboots/resets on EFI system

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Date:	Mon, 6 Jun 2011 17:27:20 +0200
From:	Maarten Lankhorst <m.b.lankhorst@...il.com>
To:	Jim Bos <jim876@...all.nl>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: 2.6.39.1 immediately reboots/resets on EFI system

Hi Jim,

2011/6/3 Jim Bos <jim876@...all.nl>:
> On 06/03/2011 03:33 PM, Matthew Garrett wrote:
>> On Fri, Jun 03, 2011 at 03:05:26PM +0200, Jim Bos wrote:
>>>
>>> *,
>>>
>>> Just applied 2.6.39.1 but my system: 64-bit SLackware, 8GB RAM, MSI mobo
>>> P67A-C45 bios V1.9. previously happily booting via EFI (nice to see
>>> Linux and the other OS actually NOT overwriting each others boot
>>> loaders!) immediately re-booted just after loading the kernel.
>>>
>>> Not even a single message is making it on the console, almost immediate
>>> system reset.  As I noticed there are several EFI related patches, I
>>> first tried to backout the change to setup.c but that didn't help so
>>> backing out all the efi changes in the 2.6.39.1 patch, i.e. the files:
>>>  - arch/x86/kernel/setup.c
>>>  - arch/x86/platform/efi/efi.c
>>>  - arch/x86/platform/efi/efi_64.c
>>> and sure enough system is booting on 2.6.39.1 with these changes removed.
>>
>> Can you try just reverting
>>
>> "x86, efi: Retain boot service code until after switching to virtual mode"
>>
>> ? You've got 143 boot services/code regions, which is more than I'd
>> tested against, so I'm unsure whether we're overflowing something here.
>>
>
> That's seems to be the only EFI patch in 2.6.39.1 and I effectively
> removed by =not= applying (skipping) the parts of the 2.6.39.1 patch to
> above 3 files.
> So yes removing "x86, efi: Retain boot service code until after
> switching to virtual mode" indeed fixes the problem for me.
Does manually applying commit 9cd2b07c1 fix things for 2.6.39.1?
commit is: x86, efi: Consolidate EFI nx control

There will be 1 apply  failure, need to change the call to
early_mapping_set_exec in early_runtime_code_mapping_set_exec to
efi_set_executable.

~Maarten
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