NTWMI.H

The public symbol file NTKRPAMP.PDB for the original release of Windows 10 tells that the kernel is built with the NTWMI.H header at

d:\th.public.fre\internal\sdk\inc\minwin

and draws from it the following type definitions:

Line Number Type
421 struct _ETW_REF_CLOCK
428 enum _ETW_BUFFER_STATE
466 enum _ETW_RT_EVENT_LOSS
476 struct _WMI_BUFFER_HEADER
3799 struct _PERFINFO_GROUPMASK
4193 struct _PERFINFO_PPM_STATE_SELECTION
4412 enum _PERFINFO_KERNELMEMORY_USAGE_TYPE
4428 enum _PERFINFO_MM_STAT

The header NTWMI.H is published in the “minwin” directory of the Windows Driver Kit (WDK) for Windows 10 in the original and Version 1511 editions.