linux-kernel - Re: [PATCH] edac: nxp: Add L1 and L2 error detection for A53 and A72 cores

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Message-ID: <20200815084157.GC25814@zn.tnic>
Date:   Sat, 15 Aug 2020 10:41:57 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Alison Wang <alison.wang@....com>,
        James Morse <james.morse@....com>
Cc:     mchehab@...nel.org, tony.luck@...el.com, rrichter@...vell.com,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] edac: nxp: Add L1 and L2 error detection for A53 and A72
 cores

On Thu, Jul 09, 2020 at 04:22:15PM +0800, Alison Wang wrote:
> Add error detection for A53 and A72 cores. Hardware error injection is
> supported on A53. Software error injection is supported on both.
> For hardware error injection on A53 to work, proper access to
> L2ACTLR_EL1, CPUACTLR_EL1 needs to be granted by EL3 firmware. This is
> done by making an SMC call in the driver. Failure to enable access
> disables hardware error injection. For error detection to work, another
> SMC call enables access to L2ECTLR_EL1.
> 
> It is for NXP's Layerscape family LS1043A, LS1046A, LS2088A and LX2160A.
> 
> Signed-off-by: York Sun <york.sun@....com>
> Signed-off-by: Alison Wang <alison.wang@....com>
> ---
>  .../bindings/edac/cortex-arm64-edac.txt       |  40 +
>  drivers/edac/Kconfig                          |   7 +
>  drivers/edac/Makefile                         |   1 +
>  drivers/edac/cortex_arm64_l1_l2.c             | 738 ++++++++++++++++++
>  drivers/edac/cortex_arm64_l1_l2.h             |  54 ++
>  5 files changed, 840 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/edac/cortex-arm64-edac.txt
>  create mode 100644 drivers/edac/cortex_arm64_l1_l2.c
>  create mode 100644 drivers/edac/cortex_arm64_l1_l2.h

This needs James to have a look at.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette