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In-Reply-To: <20180518013742.24095-1-mikey@neuling.org>
To: Michael Neuling <mikey@neuling.org>
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: mikey@neuling.org, sam@mendozajonas.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: powepc: Clear PCR on boot
Message-Id: <40qDgJ229mz9s31@ozlabs.org>
Date: Mon, 21 May 2018 19:55:56 +1000 (AEST)
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On Fri, 2018-05-18 at 01:37:42 UTC, Michael Neuling wrote:
> Clear the PCR on boot to ensure we are not running in a compat mode.
> 
> We've seen this cause problems when a crash (and kdump) occurs while
> running compat mode guests. The kdump kernel then runs with the PCR
> set and causes problems. The symptom in the kdump kernel (also seen in
> petitboot after fast-reboot) is early userspace programs taking
> sigills on newer instructions (seen in libc).
> 
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> Cc: <stable@vger.kernel.org>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/faf37c44a105f3608115785f17cbbf

cheers