linux-kernel - Re: [v1 PATCH 2/2] Add Documentation regarding the ima-kexec-buffer node in the chosen node documentation

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Message-ID: <20200617204324.GA2740878@bogus>
Date:   Wed, 17 Jun 2020 14:43:24 -0600
From:   Rob Herring <robh@...nel.org>
To:     Prakhar Srivastava <prsriva@...ux.microsoft.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, catalin.marinas@....com,
        will@...nel.org, mpe@...erman.id.au, benh@...nel.crashing.org,
        paulus@...ba.org, frowand.list@...il.com, zohar@...ux.ibm.com,
        dmitry.kasatkin@...il.com, jmorris@...ei.org, serge@...lyn.com,
        pasha.tatashin@...een.com, allison@...utok.net,
        kstewart@...uxfoundation.org, takahiro.akashi@...aro.org,
        tglx@...utronix.de, vincenzo.frascino@....com,
        mark.rutland@....com, masahiroy@...nel.org, james.morse@....com,
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        tao.li@...o.com, christophe.leroy@....fr,
        gregkh@...uxfoundation.org, nramas@...ux.microsoft.com,
        tusharsu@...ux.microsoft.com, balajib@...ux.microsoft.com
Subject: Re: [v1 PATCH 2/2] Add Documentation regarding the ima-kexec-buffer
 node in the chosen node documentation

On Sun, Jun 07, 2020 at 04:33:23PM -0700, Prakhar Srivastava wrote:
> Add Documentation regarding the ima-kexec-buffer node in
>  the chosen node documentation

Run 'git log --oneline Documentation/devicetree/bindings/chosen.txt' and 
write $subject using the dominate format used.

For the commit message, answer why you need the change, not what the 
change is. I can read the diff for that.

>  
> Signed-off-by: Prakhar Srivastava <prsriva@...ux.microsoft.com>
> ---
>  Documentation/devicetree/bindings/chosen.txt | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)

This file has moved to a schema here[1]. You need to update it.

> 
> diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt
> index 45e79172a646..a15f70c007ef 100644
> --- a/Documentation/devicetree/bindings/chosen.txt
> +++ b/Documentation/devicetree/bindings/chosen.txt
> @@ -135,3 +135,20 @@ e.g.
>  		linux,initrd-end = <0x82800000>;
>  	};
>  };
> +
> +linux,ima-kexec-buffer
> +----------------------
> +
> +This property(currently used by powerpc, arm64) holds the memory range,
> +the address and the size, of the IMA measurement logs that are being carried
> +over to the kexec session.

What's IMA? 

> +
> +/ {
> +	chosen {
> +		linux,ima-kexec-buffer = <0x9 0x82000000 0x0 0x00008000>;
> +	};
> +};
> +
> +This porperty does not represent real hardware, but the memory allocated for

typo

> +carrying the IMA measurement logs. The address and the suze are expressed in

typo

> +#address-cells and #size-cells, respectively of the root node.
> -- 
> 2.25.1
> 


[1] https://github.com/devicetree-org/dt-schema/blob/master/schemas/chosen.yaml