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From:   Ross Philipson <ross.philipson@oracle.com>
To:     linux-kernel@vger.kernel.org, x86@kernel.org,
        iommu@lists.linux-foundation.org, linux-integrity@vger.kernel.org,
        linux-doc@vger.kernel.org
Cc:     ross.philipson@oracle.com, dpsmith@apertussolutions.com,
        tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
        luto@amacapital.net, trenchboot-devel@googlegroups.com
Subject: [PATCH v2 02/12] x86: Secure Launch Kconfig
Date:   Fri, 18 Jun 2021 12:12:47 -0400
Message-Id: <1624032777-7013-3-git-send-email-ross.philipson@oracle.com>
In-Reply-To: <1624032777-7013-1-git-send-email-ross.philipson@oracle.com>
References: <1624032777-7013-1-git-send-email-ross.philipson@oracle.com>
Precedence: bulk

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 | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0045e1b..65d69f0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1989,6 +1989,38 @@ config EFI_MIXED
 
 	   If unsure, say N.
 
+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.
+
+config SECURE_LAUNCH_ALT_PCR19
+	bool "Secure Launch Alternate PCR 19 usage"
+	default n
+	depends on SECURE_LAUNCH
+	help
+	   In the post ACM environment, Secure Launch by default measures
+	   configuration information into PCR18. This feature allows finer
+	   control over measurements by moving configuration measurements
+	   into PCR19.
+
+config SECURE_LAUNCH_ALT_PCR20
+	bool "Secure Launch Alternate PCR 20 usage"
+	default n
+	depends on SECURE_LAUNCH
+	help
+	   In the post ACM environment, Secure Launch by default measures
+	   image data like any external initrd into PCR17. This feature
+	   allows finer control over measurements by moving image measurements
+	   into PCR20.
+
 source "kernel/Kconfig.hz"
 
 config KEXEC
-- 
1.8.3.1