linux-kernel - Re: [RFC v2 02/32] x86/tdx: Introduce INTEL_TDX

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Date:   Mon, 26 Apr 2021 14:09:28 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Tony Luck <tony.luck@...el.com>
Cc:     Andi Kleen <ak@...ux.intel.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Raj Ashok <ashok.raj@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 02/32] x86/tdx: Introduce INTEL_TDX_GUEST config option

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@...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 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 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 an new Intel

	                                                   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"
> 


-- 
~Randy