linux-kernel - Re: [PATCH v2] powerpc/32s: fix suspend/resume when IBATs 4-7 are used

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Message-Id: <45c3lw0kZZz9sLt@ozlabs.org>
Date:   Sun, 30 Jun 2019 18:37:31 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Andreas Schwab <schwab@...ux-m68k.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] powerpc/32s: fix suspend/resume when IBATs 4-7 are used

On Mon, 2019-06-17 at 21:42:14 UTC, Christophe Leroy wrote:
> Previously, only IBAT1 and IBAT2 were used to map kernel linear mem.
> Since commit 63b2bc619565 ("powerpc/mm/32s: Use BATs for
> STRICT_KERNEL_RWX"), we may have all 8 BATs used for mapping
> kernel text. But the suspend/restore functions only save/restore
> BATs 0 to 3, and clears BATs 4 to 7.
> 
> Make suspend and restore functions respectively save and reload
> the 8 BATs on CPUs having MMU_FTR_USE_HIGH_BATS feature.
> 
> Reported-by: Andreas Schwab <schwab@...ux-m68k.org>
> Cc: stable@...r.kernel.org
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6ecb78ef56e08d2119d337ae23cb951a640dc52d

cheers