Re: [PATCH v8 03/15] x86: Secure Launch Kconfig

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On 2/14/24 11:59 PM, Ard Biesheuvel wrote:
On Wed, 14 Feb 2024 at 23:31, Ross Philipson <ross.philipson@xxxxxxxxxx> 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@xxxxxxxxxx>
---
  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




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