Re: [PATCH v3 10/12] x86/virt/tdx: Wire up basic SEAMCALL functions

[Sean Christopherson]

On Mon, Aug 07, 2023, Kai Huang wrote:
> 
> > >  
> > > +config INTEL_TDX_HOST
> > > +	bool "Intel Trust Domain Extensions (TDX) host support"
> > > +	depends on CPU_SUP_INTEL
> > > +	depends on X86_64
> > > +	depends on KVM_INTEL
> > 
> > Hm. I expected KVM_INTEL to depend on CPU_SUP_INTEL, but apparently no.
> > Any reasons why?
> 
> Hmm.. Not sure :-)

Centuar and Zhaoxin CPUs also support VMX.

  commit 8f63aaf5c493c6502a058585cdfa3c71cdf8c44a
  Author: Sean Christopherson <seanjc@xxxxxxxxxx>
  Date:   Fri Dec 20 20:45:13 2019 -0800

    KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs
    
    Change the dependency for KVM_INTEL, i.e. KVM w/ VMX, from Intel CPUs to
    any CPU that supports the IA32_FEAT_CTL MSR and thus VMX functionality.
    This effectively allows building KVM_INTEL for Centaur and Zhaoxin CPUs.