linux-kernel - Re: [REGRESSION] "efi: efistub: Convert into static library" and preparation patches

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Date:	Mon, 22 Sep 2014 17:24:00 -0400
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Michael Brown <mbrown@...systems.co.uk>,
	Maarten Lankhorst <maarten.lankhorst@...onical.com>,
	Ulf Winkelvos <ulf@...kelvos.de>,
	Matt Fleming <matt.fleming@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Seth Forshee <seth.forshee@...onical.com>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [REGRESSION] "efi: efistub: Convert into static library" and
 preparation patches

On Mon, Sep 22, 2014 at 5:07 PM, Matt Fleming <matt@...sole-pimps.org> wrote:
> On Mon, 22 Sep, at 02:44:23PM, Josh Boyer wrote:
>>
>> This wound up in rc6 as commit
>> 9cb0e394234d244fe5a97e743ec9dd7ddff7e64b.  That caused all the EFI
>> machines I have to no longer boot.  They hang after the 'setup_efi_pci
>> failed' message and I get nothing from the kernel at all, even with
>> earlyprintk, etc.
>>
>> I did a git bisect between rc5 and rc6 and it points to this commit.
>> This is a typical Fedora setup, which is EFI->shim->grub2->kernel.  It
>> broke the boot on multiple machines I have, and I've confirmed that a
>> revert on top of rc6 makes things boot again on both my macbook and my
>> tunnel mountain machine.  I'll be testing it on my celeron and i7
>> based NUC machines as well, but I expect similar results.
>
> Thanks for doing the bisect.
>
> I've now booted with this commit using grub2 and it boots fine on Qemu.
> I don't have a shim setup, but I'll look at sorting one out.
>
>> Is there something I can do to help debug why this is failing on this
>> kind of setup?  Config and bisect log are attached below for the
>> macbook I used for the bisect.
>
> Could you provide the dmesg of a working boot? I'm curious to know more
> about your memory map layout.

Attached for all the machines that were broken before the revert (from
an RC6 build with the revert).

> Other than that, trying to diagnose exactly where it hangs during
> booting would be useful.

I'll try poking around tomorrow and seeing what I can find.

josh

View attachment "dmesg-rc6.txt" of type "text/plain" (286597 bytes)