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Date: Thu, 15 Mar 2018 02:07:28 +0100 From: Borislav Petkov <bp@...en8.de> To: York Sun <york.sun@....com> Cc: linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH RFC 1/2] drivers/edac: Add L1 and L2 error detection for A53 and A57 On Wed, Mar 14, 2018 at 05:17:46PM -0700, York Sun wrote: > Add error detection for A53 and A57 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 interrupt to work, > another SMC call enables access to L2ECTLR_EL1. Failure to enable > access disables interrupt for error reporting. > > Signed-off-by: York Sun <york.sun@....com> > --- > .../devicetree/bindings/edac/cortex-arm64-edac.txt | 37 + > arch/arm64/include/asm/cacheflush.h | 1 + > arch/arm64/mm/cache.S | 35 + > drivers/edac/Kconfig | 6 + > drivers/edac/Makefile | 1 + > drivers/edac/cortex_arm64_l1_l2.c | 741 +++++++++++++++++++++ I don't want per-functional unit EDAC drivers. Also, what happened to talking to ARM people about designing a generic ARM64 EDAC driver? If this is going to be it, then it should be called edac_arm64.c and it should contain all the architectural RAS functionality in it. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
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