ETWP.H

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

d:\th\minkernel\ntos\etw

and draws from it the following type definitions:

Line Number	Type
594	struct _ETW_BUFFER_QUEUE
600	enum _ETW_HEADER_TYPE
612	struct _ETW_PMC_SUPPORT
620	struct _WMI_LOGGER_CONTEXT
860	struct _ETW_REALTIME_CONSUMER
908	struct _ETW_LOGGER_HANDLE
2385	enum _ETW_STRING_TOKEN_TYPE
2392	enum _ETW_PERFECT_HASH_FUNCTION_TYPE
2408	struct _ETW_LAST_ENABLE_INFO
2427	struct _ETW_PAYLOAD_FILTER
2432	struct _ETW_FILTER_PID
2437	struct _ETW_FILTER_STRING_TOKEN_ELEMENT
2442	struct _ETW_FILTER_STRING_TOKEN
2453	struct _ETW_FILTER_HEADER
2465	struct _ETW_GUID_ENTRY
2491	struct _ETW_REPLY_QUEUE
2512	struct _ETW_QUEUE_ENTRY
2523	struct _ETW_PROVIDER_TRAITS
2529	struct _ETW_REG_ENTRY
2638	struct _ETW_SILODRIVERSTATE

The header ETWP.H is not known in any Device Driver Kit (DDK) or Windows Driver Kit (WDK).