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

[ross.philipson@oracle.com]

On 12/15/25 7:20 PM, Randy Dunlap wrote:
> 
> 
> 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

Thank you, will fix.
Ross

> 
>> +	  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
>