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

[Kuppuswamy, Sathyanarayanan]

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 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

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.
> > +
> >   endif #HYPERVISOR_GUEST
> >   
> >   source "arch/x86/Kconfig.cpu"

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer