linux-kernel - Re: [PATCH] Documentation: Begin a RAS section

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Date:   Tue, 28 Nov 2023 10:23:21 -0500
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>
Cc:     yazen.ghannam@....com, Muralidhara M K <muralimk@....com>,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        Muralidhara M K <muralidhara.mk@....com>,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH] Documentation: Begin a RAS section

On 11/28/2023 9:20 AM, Borislav Petkov wrote:
> On Thu, Nov 02, 2023 at 11:42:22AM +0000, Muralidhara M K wrote:
>> From: Muralidhara M K <muralidhara.mk@....com>
>>
>> AMD systems with Scalable MCA, each machine check error of a SMCA bank
>> type has an associated bit position in the bank's control (CTL) register.
> 
> Ontop of this. It is long overdue:
> 
> ---
> From: "Borislav Petkov (AMD)" <bp@...en8.de>
> Date: Tue, 28 Nov 2023 14:37:56 +0100
> 
> Add some initial RAS documentation. The expectation is for this to
> collect all the user-visible features for interacting with the RAS
> features of the kernel.
> 
> Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
> ---
>   Documentation/RAS/ras.rst | 26 ++++++++++++++++++++++++++
>   Documentation/index.rst   |  1 +
>   2 files changed, 27 insertions(+)
>   create mode 100644 Documentation/RAS/ras.rst
> 
> diff --git a/Documentation/RAS/ras.rst b/Documentation/RAS/ras.rst
> new file mode 100644
> index 000000000000..2556b397cd27
> --- /dev/null
> +++ b/Documentation/RAS/ras.rst
> @@ -0,0 +1,26 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +Reliability, Availability and Serviceability features
> +=====================================================
> +
> +This documents different aspects of the RAS functionality present in the
> +kernel.
> +
> +Error decoding
> +---------------
> +
> +* x86
> +
> +Error decoding on AMD systems should be done using the rasdaemon tool:
> +https://github.com/mchehab/rasdaemon/
> +
> +While the daemon is running, it would automatically log and decode
> +errors. If not, one can still decode such errors by supplying the
> +hardware information from the error::
> +
> +        $ rasdaemon -p --status <STATUS> --ipid <IPID> --smca
> +
> +Also, the user can pass particular family and model to decode the error
> +string::
> +
> +        $ rasdaemon -p --status <STATUS> --ipid <IPID> --smca --family <CPU Family> --model <CPU Model> --bank <BANK_NUM>
> diff --git a/Documentation/index.rst b/Documentation/index.rst
> index 9dfdc826618c..36e61783437c 100644
> --- a/Documentation/index.rst
> +++ b/Documentation/index.rst
> @@ -113,6 +113,7 @@ to ReStructured Text format, or are simply too old.
>      :maxdepth: 1
>   
>      staging/index
> +   RAS/ras
>   
>   
>   Translations

Thanks for starting this. I'll add some notes for the AMD Address 
Translation Library in the next revision.

Thanks,
Yazen