From: Bob Tracy <rct@gherkin.frus.com>
To: Borislav Petkov <bp@amd64.org>, linux-kernel@vger.kernel.org
Subject: Re: [BUG] 3.2-rcX regression: boot failure on AMD K6-III/450
Date: Mon, 28 Nov 2011 08:47:38 -0600 [thread overview]
Message-ID: <20111128144738.GA3119@gherkin.frus.com> (raw)
In-Reply-To: <20111128140143.GA4522@x1.osrc.amd.com>
On Mon, Nov 28, 2011 at 03:01:43PM +0100, Borislav Petkov wrote:
> can you try the following patch:
> (...)
> bcb80e53877c ("x86, microcode, AMD: Add microcode revision to
> /proc/cpuinfo") added support for dumping microcode patch level in
> /proc/cpuinfo on AMD. Although we were very cautious and did rdmsr_safe
> the microcode patch level MSR, this broke booting on Geode LX because
> this CPU doesn't have that MSR and at the time we do the read, exception
> tables which are used by rdmsr_safe are not yet initialized, leading to
> the boot hang.
>
> This is the simple fix which enables the microcode line in /proc/cpuinfo
> for K8 and newer (it is not that interesting for older boxes anyway :-)).
>
> Reported-and-bisected-and-tested-by: Daniel Drake <dsd@laptop.org>
> Link: http://lkml.kernel.org/r/CAMLZHHTSuHZoPbm_YfB8G05JA+xKCE4+Jmj4NW8mnZUHogQSBA@mail.gmail.com
> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
That fixed it. Thank you!
--Bob
next prev parent reply other threads:[~2011-11-28 14:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-26 18:17 [BUG] 3.2-rcX regression: boot failure on AMD K6-III/450 Bob Tracy
2011-11-28 14:01 ` Borislav Petkov
2011-11-28 14:47 ` Bob Tracy [this message]
2011-11-28 15:36 ` Borislav Petkov
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