linux-kernel - [PATCH v3 02/11] x86/tdx: Introduce INTEL_TDX

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Message-Id: <20210618225755.662725-3-sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Fri, 18 Jun 2021 15:57:46 -0700
From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>
Cc:     Peter H Anvin <hpa@...or.com>, Dave Hansen <dave.hansen@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 02/11] x86/tdx: Introduce INTEL_TDX_GUEST config option

Add INTEL_TDX_GUEST config option to selectively compile
TDX guest support.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/Kconfig | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0045e1b44190..ff79263aebd1 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -876,6 +876,21 @@ config ACRN_GUEST
 	  IOT with small footprint and real-time features. More details can be
 	  found in https://projectacrn.org/.
 
+config INTEL_TDX_GUEST
+	bool "Intel Trusted Domain eXtensions Guest Support"
+	depends on X86_64 && CPU_SUP_INTEL && PARAVIRT
+	depends on SECURITY
+	select PARAVIRT_XL
+	select X86_X2APIC
+	select SECURITY_LOCKDOWN_LSM
+	help
+	  Provide support for running in a trusted domain on Intel processors
+	  equipped with Trusted Domain eXtenstions. TDX is a new Intel
+	  technology that extends VMX and Memory Encryption with a new kind of
+	  virtual machine guest called Trust Domain (TD). A TD is designed to
+	  run in a CPU mode that protects the confidentiality of TD memory
+	  contents and the TD’s CPU state from other software, including VMM.
+
 endif #HYPERVISOR_GUEST
 
 source "arch/x86/Kconfig.cpu"
-- 
2.25.1