linux-kernel - Re: [PATCH for 5.10] powerpc/32s: Fix RTAS machine check with VMAP stack

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Message-ID: <20210113165045.GR4035784@sasha-vm>
Date:   Wed, 13 Jan 2021 11:50:45 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH for 5.10] powerpc/32s: Fix RTAS machine check with VMAP
 stack

On Wed, Jan 13, 2021 at 06:40:20AM +0000, Christophe Leroy wrote:
>This is backport for 5.10
>
>(cherry picked from commit 98bf2d3f4970179c702ef64db658e0553bc6ef3a)
>
>When we have VMAP stack, exception prolog 1 sets r1, not r11.
>
>When it is not an RTAS machine check, don't trash r1 because it is
>needed by prolog 1.
>
>Fixes: da7bb43ab9da ("powerpc/32: Fix vmap stack - Properly set r1 before activating MMU")
>Cc: stable@...r.kernel.org # v5.10+
>Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
>[mpe: Squash in fixup for RTAS machine check from Christophe]
>Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
>Link: https://lore.kernel.org/r/bc77d61d1c18940e456a2dee464f1e2eda65a3f0.1608621048.git.christophe.leroy@csgroup.eu

Queued up, thanks!

-- 
Thanks,
Sasha