On Wed Mar 27, 2024 at 10:24 AM EET, David Gstir wrote:
> Document the kernel parameters trusted.dcp_use_otp_key
> and trusted.dcp_skip_zk_test for DCP-backed trusted keys.
>
> Co-developed-by: Richard Weinberger <rich...@nod.at>
> Signed-off-by: Richard Weinberger <rich...@nod.at>
> Co-developed-by: David Oberhollenzer <david.oberhollen...@sigma-star.at>
> Signed-off-by: David Oberhollenzer <david.oberhollen...@sigma-star.at>
> Signed-off-by: David Gstir <da...@sigma-star.at>
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt 
> b/Documentation/admin-guide/kernel-parameters.txt
> index 24c02c704049..b6944e57768a 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -6698,6 +6698,7 @@
>                       - "tpm"
>                       - "tee"
>                       - "caam"
> +                     - "dcp"
>                       If not specified then it defaults to iterating through
>                       the trust source list starting with TPM and assigns the
>                       first trust source as a backend which is initialized
> @@ -6713,6 +6714,18 @@
>                       If not specified, "default" is used. In this case,
>                       the RNG's choice is left to each individual trust 
> source.
>  
> +     trusted.dcp_use_otp_key
> +                     This is intended to be used in combination with
> +                     trusted.source=dcp and will select the DCP OTP key
> +                     instead of the DCP UNIQUE key blob encryption.
> +
> +     trusted.dcp_skip_zk_test
> +                     This is intended to be used in combination with
> +                     trusted.source=dcp and will disable the check if all
> +                     the blob key is zero'ed. This is helpful for situations 
> where
> +                     having this key zero'ed is acceptable. E.g. in testing
> +                     scenarios.
> +
>       tsc=            Disable clocksource stability checks for TSC.
>                       Format: <string>
>                       [x86] reliable: mark tsc clocksource as reliable, this

Nicely documented, i.e. even I can understand what is said here :-)

Reviewed-by: Jarkko Sakkinen <jar...@kernel.org>

BR, Jarkko

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