On 12/8/22 22:52, Kai Huang wrote: > +++ b/arch/x86/virt/vmx/tdx/tdx.h > @@ -0,0 +1,15 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef _X86_VIRT_TDX_H > +#define _X86_VIRT_TDX_H > + > +/* > + * This file contains both macros and data structures defined by the TDX > + * architecture and Linux defined software data structures and functions. > + * The two should not be mixed together for better readability. The > + * architectural definitions come first. > + */ > + > +/* MSR to report KeyID partitioning between MKTME and TDX */ > +#define MSR_IA32_MKTME_KEYID_PARTITIONING 0x00000087 The *VAST* majority of MSR definitions are in msr-index.h. Why is this one different from the norm?