linux-kernel - Re: [PATCH v14 02/19] x86: Secure Launch Kconfig

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Message-ID: <231e4cef-2e44-4e25-9169-f298e72e8e07@linux.intel.com>
Date: Wed, 18 Jun 2025 10:32:04 +0200
From: "Mowka, Mateusz" <mateusz.mowka@...ux.intel.com>
To: Ross Philipson <ross.philipson@...cle.com>, linux-kernel@...r.kernel.org,
 x86@...nel.org, linux-integrity@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-crypto@...r.kernel.org, kexec@...ts.infradead.org,
 linux-efi@...r.kernel.org, iommu@...ts.linux.dev
Cc: dpsmith@...rtussolutions.com, tglx@...utronix.de, mingo@...hat.com,
 bp@...en8.de, hpa@...or.com, dave.hansen@...ux.intel.com, ardb@...nel.org,
 mjg59@...f.ucam.org, James.Bottomley@...senpartnership.com,
 peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca, luto@...capital.net,
 nivedita@...m.mit.edu, herbert@...dor.apana.org.au, davem@...emloft.net,
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 baolu.lu@...ux.intel.com, kanth.ghatraju@...cle.com,
 andrew.cooper3@...rix.com, trenchboot-devel@...glegroups.com
Subject: Re: [PATCH v14 02/19] x86: Secure Launch Kconfig


On 21-Apr-25 6:26 PM, 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>

Acked-by: Mateusz Mowka <mateusz.mowka@...ux.intel.com>

> ---
>   arch/x86/Kconfig | 11 +++++++++++
>   1 file changed, 11 insertions(+)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 4b9f378e05f6..badde1e9742e 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -2001,6 +2001,17 @@ config EFI_RUNTIME_MAP
>   
>   	  See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
>   
> +config SECURE_LAUNCH
> +	bool "Secure Launch support"
> +	depends on X86_64 && X86_X2APIC && TCG_TIS && TCG_CRB && CRYPTO_LIB_SHA1 && CRYPTO_LIB_SHA256
> +	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.
> +
>   source "kernel/Kconfig.hz"
>   
>   config ARCH_SUPPORTS_KEXEC