Re: [PATCH v5 1/2] KVM: VMX: Cleanup VMX basic information defines and usages

[Sean Christopherson <seanjc@google.com>]

On Wed, Feb 14, 2024, Xin3 Li wrote:
> > VMX_EPT_PAGE_WALK_4_BIT)))
> > 			return false;
> > 		break;
> > 	default:
> > 		return false;
> > 	}
> >
> 
> I see your point here.  But "#define VMX_EPTP_MT_WB	0x6ull" seems to define
> its own memory type 0x6.  I think what we want is:
> 
> /* in a pat/mtrr header */
> #define MEM_TYPE_WB 0x6
> 
> /* vmx.h */
> #define VMX_EPTP_MT_WB	MEM_TYPE_WB
> 
> if it's not regarded as another layer of indirect.

Heh, yep, I already had this:

/* The EPTP memtype is encoded in bits 2:0, i.e. doesn't need to be shifted. */
#define VMX_EPTP_MT_MASK			0x7ull
#define VMX_EPTP_MT_WB				X86_MEMTYPE_WB
#define VMX_EPTP_MT_UC				X86_MEMTYPE_UC