linux-kernel - Re: [PATCH 01/13] x86: Secure Launch Kconfig

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Message-ID: <22ecb054-c340-cea7-7d80-28469fdcddc6@infradead.org>
Date:   Thu, 24 Sep 2020 19:08:53 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Ross Philipson <ross.philipson@...cle.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        iommu@...ts.linux-foundation.org, linux-integrity@...r.kernel.org,
        linux-doc@...r.kernel.org
Cc:     dpsmith@...rtussolutions.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, luto@...capital.net,
        trenchboot-devel@...glegroups.com
Subject: Re: [PATCH 01/13] x86: Secure Launch Kconfig

On 9/24/20 7:58 AM, Ross Philipson wrote:
> Initial bits to bring in Secure Launch functionality. Add Kconfig
> options for compiling in/out the Secure Launch code.
> 
> Signed-off-by: Ross Philipson <ross.philipson@...cle.com>

Hi,
from Documentation/process/coding-style.rst:

Lines under a ``config`` definition
are indented with one tab, while help text is indented an additional two
spaces.

> ---
>  arch/x86/Kconfig | 36 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 7101ac6..8957981 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1968,6 +1968,42 @@ config EFI_MIXED
>  
>  	   If unsure, say N.
>  
> +config SECURE_LAUNCH
> +	bool "Secure Launch support"
> +	default n
> +	depends on X86_64
> +	help
> +	   The Secure Launch feature allows a kernel to be loaded
> +	   directly through an Intel TXT measured launch. Intel TXT
> +	   establishes a Dynamic Root of Trust for Measurement (DRTM)
> +	   where the CPU measures the kernel image. This feature then
> +	   continues the measurement chain over kernel configuration
> +	   information and init images.
> +
> +choice
> +	prompt "Select Secure Launch Algorithm for TPM2"
> +	depends on SECURE_LAUNCH
> +
> +config SECURE_LAUNCH_SHA1
> +	bool "Secure Launch TPM1 SHA1"
> +	help
> +	   When using Secure Launch and TPM1 is present, use SHA1 hash
> +	   algorithm for measurements.
> +
> +config SECURE_LAUNCH_SHA256
> +	bool "Secure Launch TPM2 SHA256"
> +	help
> +	   When using Secure Launch and TPM2 is present, use SHA256 hash
> +	   algorithm for measurements.
> +
> +config SECURE_LAUNCH_SHA512
> +	bool "Secure Launch TPM2 SHA512"
> +	help
> +	   When using Secure Launch and TPM2 is present, use SHA512 hash
> +	   algorithm for measurements.
> +
> +endchoice
> +


thanks.
-- 
~Randy