linux-kernel - Re: early microcode on amd is broken when no initramfs provided

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Date:	Thu, 11 Jul 2013 23:05:25 +0200
From:	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Jacob Shin <jacob.shin@....com>, linux-kernel@...r.kernel.org,
	Jacob Shin <jacob.w.shin@...il.com>
Subject: Re: early microcode on amd is broken when no initramfs provided

On Wed, 10 Jul 2013 09:30:49 +0200
Borislav Petkov <bp@...en8.de> wrote:

> On Tue, Jul 09, 2013 at 06:36:01PM +0200, Johannes Hirte wrote:
> > When CONFIG_MICROCODE_EARLY is enabled on AMD but no initramfs is
> > provided in the bootmanager (grub2), the system hangs here:
> 
> Hmm, I can't reproduce it here.
> 
> grub2 entry is:
> 
> menuentry 'Debian GNU/Linux, with Linux 3.10.0+' --class debian
> --class gnu-linux --class gnu --class os { load_video
>         insmod gzio
>         insmod part_msdos
>         insmod ext2
>         set root='(hd0,msdos1)'
>         search --no-floppy --fs-uuid --set=root
> adbbd17b-6e04-4458-814f-9a2b75a4d91e echo    'Loading Linux
> 3.10.0+ ...' linux   /boot/vmlinuz-3.10.0+ root=/dev/sda1 ro
> resume=/dev/sda2 ignore_loglevel }
> 
> Kernel is: v3.10-8587-g496322b
> 
> .config settings are:
> 
> $ zgrep -E "(INITRD|MICROCODE)" /proc/config.gz
> CONFIG_BLK_DEV_INITRD=y
> CONFIG_MICROCODE=y
> CONFIG_MICROCODE_INTEL=y
> CONFIG_MICROCODE_AMD=y
> CONFIG_MICROCODE_OLD_INTERFACE=y
> CONFIG_MICROCODE_INTEL_LIB=y
> CONFIG_MICROCODE_INTEL_EARLY=y
> CONFIG_MICROCODE_AMD_EARLY=y
> CONFIG_MICROCODE_EARLY=y
> # CONFIG_ACPI_INITRD_TABLE_OVERRIDE is not set
> 
> Can you send me your .config and your grub entry please?
> 
> Thanks.
> 

grub entry:

menuentry 'Gentoo GNU/Linux 3.10.0-09080-g19d2f8e' --class gentoo
--class gnu-linux --class gnu --class os $menuentry_id_option
'gnulinux-simple-d044ac73-1dd2-4250-b864-5cb25fd67192' { load_video
insmod gzio insmod part_msdos
        insmod btrfs
        set root='hd0,msdos3'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root
--hint-bios=hd0,msdos3 --hint-efi=hd0,msdos3
--hint-baremetal=ahci0,msdos3  c684c3ff-5bac-4ba8-8f63-c9036c2ad233
else search --no-floppy --fs-uuid --set=root
c684c3ff-5bac-4ba8-8f63-c9036c2ad233 fi echo    'Linux
3.10.0-09080-g19d2f8e wird geladen …'
linux   /vmlinuz-3.10.0-09080-g19d2f8e root=/dev/sda1 ro
pcie_aspm=force radeon.dpm=1 }

config is attached

Download attachment "config.bz2" of type "application/x-bzip" (17430 bytes)