Re: [RFC v2 02/32] x86/tdx: Introduce INTEL_TDX_GUEST config option

From: Kuppuswamy, Sathyanarayanan
Date: Mon Apr 26 2021 - 18:32:11 EST

On 4/26/21 2:09 PM, Randy Dunlap wrote:
On 4/26/21 11:01 AM, Kuppuswamy Sathyanarayanan wrote:
Add INTEL_TDX_GUEST config option to selectively compile
TDX guest support.

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

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6b4b682af468..932e6d759ba7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -875,6 +875,21 @@ config ACRN_GUEST
IOT with small footprint and real-time features. More details can be
found in
+ bool "Intel Trusted Domain eXtensions Guest Support"
+ depends on X86_64 && CPU_SUP_INTEL && PARAVIRT
+ depends on SECURITY
+ select PARAVIRT_XL
+ select X86_X2APIC
+ help
+ Provide support for running in a trusted domain on Intel processors
+ equipped with Trusted Domain eXtenstions. TDX is an new Intel

a new Intel

Good catch. I will fix it in next version.

+ 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.
source "arch/x86/Kconfig.cpu"

Sathyanarayanan Kuppuswamy
Linux Kernel Developer