Geoff Chappell, Software Analyst
The public symbol file NTKRPAMP.PDB for the original release of Windows 10 tells that the kernel is built with the PO_X.H header at
d:\th\minkernel\ntos\inc
and draws from it the following type definitions:
| Line Number | Type | WDM.H | NTOSP.H |
|---|---|---|---|
| 599 | enum _PO_FX_PERF_STATE_UNIT | 34417 | 40930 |
| 606 | enum _PO_FX_PERF_STATE_TYPE | 34424 | 40937 |
| 612 | struct _PO_FX_PERF_STATE | 34430 | 40943 |
| 617 | struct _PO_FX_COMPONENT_PERF_SET | 34435 | 40948 |
| 623 | unnamed struct for Discrete in _PO_FX_COMPONENT_PERF_SET | 34441 | 40954 |
| 627 | unnamed struct for Range in _PO_FX_COMPONENT_PERF_SET | 34445 | 40958 |
| 639 | struct _PO_FX_PERF_STATE_CHANGE | 34457 | 40970 |
The header PO_X.H is not known in any Device Driver Kit (DDK) or Windows Driver Kit (WDK).