linux-kernel - Re: [PATCH 2/2] sifive: edac: Add EDAC driver for Sifive l2 Cache Controller

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Message-ID: <20190312092842.GC28589@zn.tnic>
Date:   Tue, 12 Mar 2019 10:28:42 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Yash Shah <yash.shah@...ive.com>
Cc:     linux-riscv@...ts.infradead.org, linux-edac@...r.kernel.org,
        palmer@...ive.com, paul.walmsley@...ive.com,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, aou@...s.berkeley.edu, mchehab@...nel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] sifive: edac: Add EDAC driver for Sifive l2 Cache
 Controller

On Tue, Mar 12, 2019 at 02:51:01PM +0530, Yash Shah wrote:
> Add driver for the SiFive L2 cache controller
> on the HiFive Unleashed board
> 
> Signed-off-by: Yash Shah <yash.shah@...ive.com>
> ---
>  arch/riscv/Kconfig            |   1 +
>  drivers/edac/Kconfig          |   7 +
>  drivers/edac/Makefile         |   1 +
>  drivers/edac/sifive_edac-l2.c | 292 ++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 301 insertions(+)
>  create mode 100644 drivers/edac/sifive_edac-l2.c
> 
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 515fc3c..fede4b6 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -49,6 +49,7 @@ config RISCV
>  	select RISCV_TIMER
>  	select GENERIC_IRQ_MULTI_HANDLER
>  	select ARCH_HAS_PTE_SPECIAL
> +	select EDAC_SUPPORT
>  
>  config MMU
>  	def_bool y
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index e286b5b..63ccdf1 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -440,6 +440,13 @@ config EDAC_ALTERA_SDMMC
>  	  Support for error detection and correction on the
>  	  Altera SDMMC FIFO Memory for Altera SoCs.
>  
> +config EDAC_SIFIVE_L2
> +	tristate "Sifive L2 Cache"
> +	depends on RISCV
> +	help
> +	  Support for error detection and correction on the SiFive L2
> +	  cache controller.

Please no EDAC drivers for a single functional unit with RAS
capabilities. Rather, a sifive_edac or riscv_edac driver which covers
the whole platform or even architecture and contains support for all the
RAS functionality there. See altera_edac, for example.

HTH.

-- 
Regards/Gruss,
    Boris.

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