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

Randy Dunlap
2025-12-16T03:20:26Z

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@oracle.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