diff mbox series

[v8,03/15] x86: Secure Launch Kconfig

Message ID 20240214221847.2066632-4-ross.philipson@oracle.com
State New
Headers
Series x86: Trenchboot secure dynamic launch Linux kernel support |

Commit Message

Ross Philipson Feb. 14, 2024, 10:18 p.m. UTC 
  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@oracle.com>
---
 arch/x86/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Ard Biesheuvel Feb. 15, 2024, 7:59 a.m. UTC | #1 
On Wed, 14 Feb 2024 at 23:31, Ross Philipson <ross.philipson@oracle.com> 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@oracle.com>
> ---
>  arch/x86/Kconfig | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 5edec175b9bf..d96d75f6f1a9 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -2071,6 +2071,18 @@ config EFI_RUNTIME_MAP
>
>           See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
>
> +config SECURE_LAUNCH
> +       bool "Secure Launch support"
> +       default n

'n' is already the default, so you can drop this line.

> +       depends on X86_64 && X86_X2APIC

This depends on CONFIG_TCG_TPM as well (I got build failures without it)

> +       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
> --
> 2.39.3
>
Ross Philipson Feb. 15, 2024, 10:20 p.m. UTC | #2 
On 2/14/24 11:59 PM, Ard Biesheuvel wrote:
> On Wed, 14 Feb 2024 at 23:31, Ross Philipson <ross.philipson@oracle.com> 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@oracle.com>
>> ---
>>   arch/x86/Kconfig | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 5edec175b9bf..d96d75f6f1a9 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -2071,6 +2071,18 @@ config EFI_RUNTIME_MAP
>>
>>            See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
>>
>> +config SECURE_LAUNCH
>> +       bool "Secure Launch support"
>> +       default n
> 
> 'n' is already the default, so you can drop this line.

Ack

> 
>> +       depends on X86_64 && X86_X2APIC
> 
> This depends on CONFIG_TCG_TPM as well (I got build failures without it)

Yes I will add that. I may have to add a couple of other things too.

Thanks
Ross

> 
>> +       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
>> --
>> 2.39.3
>>
>
diff mbox series

Patch

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5edec175b9bf..d96d75f6f1a9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2071,6 +2071,18 @@  config EFI_RUNTIME_MAP
 
 	  See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
 
+config SECURE_LAUNCH
+	bool "Secure Launch support"
+	default n
+	depends on X86_64 && X86_X2APIC
+	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