[PATCH v16 16/38] x86: Secure Launch Kconfig

[Ross Philipson <ross.philipson@gmail.com>]

Add an x86 Kconfig option for compiling in/out the Secure Launch feature.
Secure Launch is controlled by a single on/off boolean.

Signed-off-by: Ross Philipson <ross.philipson@gmail.com>
---
 arch/x86/Kconfig | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e2df1b147184..fd9edb0651d9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1989,6 +1989,21 @@ 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
+	select CRYPTO_LIB_SHA512
+	help
+	  The Secure Launch feature allows a kernel to be launched directly
+	  through a vendor neutral DRTM (Dynamic Root of Trust for Measurement)
+	  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
-- 
2.47.3