linux-kernel - Re: [PATCH v15 13/28] x86: Secure Launch Kconfig

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f2b1d24f-86fd-4b90-b6c0-126a4a2368ec@infradead.org>
Date: Mon, 15 Dec 2025 19:20:13 -0800
From: Randy Dunlap <rdunlap@...radead.org>
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,
 corbet@....net, ebiederm@...ssion.com, dwmw2@...radead.org,
 baolu.lu@...ux.intel.com, kanth.ghatraju@...cle.com,
 andrew.cooper3@...rix.com, trenchboot-devel@...glegroups.com
Subject: Re: [PATCH v15 13/28] x86: Secure Launch Kconfig



On 12/15/25 3:33 PM, Ross Philipson wrote:
> Add a Kconfig option for compiling in/out the Secure Launch feature.
> Secure Launch is controlled by a singel boolean on/off.
> 
> Signed-off-by: Ross Philipson <ross.philipson@...cle.com>
> ---
>  arch/x86/Kconfig | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index fa3b616af03a..9404d207c420 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1975,6 +1975,20 @@ config EFI_RUNTIME_MAP
>  
>  	  See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
>  
> +config SECURE_LAUNCH
> +	bool "Secure Launch DRTM support"
> +	depends on X86_64 && X86_X2APIC && TCG_TIS && TCG_CRB
> +	select CRYPTO_LIB_SHA1
> +	select CRYPTO_LIB_SHA256
> +	help
> +	  The Secure Launch feature allows a kernel to be launched directly
> +	  through a vendor neutral DTRM (Dynamic Root of Trust for Measurement)

	                           DRTM

> +	  solution, with Intel TXT being one example.  The DRTM establishes an
> +	  environment where the CPU measures the kernel image, employing the TPM,
> +	  before starting it. Secure Launch then continues the measurement chain
> +	  over kernel configuration information and other launch artifacts (e.g.
> +	  any initramfs image).
> +
>  source "kernel/Kconfig.hz"
>  
>  config ARCH_SUPPORTS_KEXEC

-- 
~Randy