linux-kernel - [PATCH 01/13] x86: Secure Launch Kconfig

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Date:   Thu, 24 Sep 2020 10:58:29 -0400
From:   Ross Philipson <ross.philipson@...cle.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org,
        iommu@...ts.linux-foundation.org, linux-integrity@...r.kernel.org,
        linux-doc@...r.kernel.org
Cc:     ross.philipson@...cle.com, dpsmith@...rtussolutions.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        luto@...capital.net, trenchboot-devel@...glegroups.com
Subject: [PATCH 01/13] x86: Secure Launch Kconfig

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@...cle.com>
---
 arch/x86/Kconfig | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7101ac6..8957981 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1968,6 +1968,42 @@ config EFI_MIXED
 
 	   If unsure, say N.
 
+config SECURE_LAUNCH
+	bool "Secure Launch support"
+	default n
+	depends on X86_64
+	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.
+
+choice
+	prompt "Select Secure Launch Algorithm for TPM2"
+	depends on SECURE_LAUNCH
+
+config SECURE_LAUNCH_SHA1
+	bool "Secure Launch TPM1 SHA1"
+	help
+	   When using Secure Launch and TPM1 is present, use SHA1 hash
+	   algorithm for measurements.
+
+config SECURE_LAUNCH_SHA256
+	bool "Secure Launch TPM2 SHA256"
+	help
+	   When using Secure Launch and TPM2 is present, use SHA256 hash
+	   algorithm for measurements.
+
+config SECURE_LAUNCH_SHA512
+	bool "Secure Launch TPM2 SHA512"
+	help
+	   When using Secure Launch and TPM2 is present, use SHA512 hash
+	   algorithm for measurements.
+
+endchoice
+
 config SECCOMP
 	def_bool y
 	prompt "Enable seccomp to safely compute untrusted bytecode"
-- 
1.8.3.1