linux-kernel - Re: [PATCH] powerpc/pseries: Fix update of LPAR security flavor after LPM

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Message-Id: <162885586748.2317031.9018391947607622770.b4-ty@ellerman.id.au>
Date:   Fri, 13 Aug 2021 21:57:47 +1000
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        Laurent Dufour <ldufour@...ux.ibm.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] powerpc/pseries: Fix update of LPAR security flavor after LPM

On Thu, 5 Aug 2021 17:23:08 +0200, Laurent Dufour wrote:
> After LPM, when migrating from a system with security mitigation enabled to
> a system with mitigation disabled, the security flavor exposed in /proc is
> not correctly set back to 0.
> 
> Do not assume the value of the security flavor is set to 0 when entering
> init_cpu_char_feature_flags(), so when called after a LPM, the value is set
> correctly even if the mitigation are not turned off.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/pseries: Fix update of LPAR security flavor after LPM
      https://git.kernel.org/powerpc/c/c18956e6e0b95f78dad2773ecc8c61a9e41f6405

cheers