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

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Message-ID: <20130710073049.GA15525@pd.tnic>
Date:	Wed, 10 Jul 2013 09:30:49 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Johannes Hirte <johannes.hirte@....tu-ilmenau.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 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.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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