NEMR3Native-win.cpp@ 92341

Last change on this file since 92341 was 92177, checked in by vboxsync, 3 years ago
VMM/PGM,NEM: Moved the StatProfQueryGpaRangeDirtyBitmap NEM stat up to PGM. bugref:10122
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 156.5 KB

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1	/* $Id: NEMR3Native-win.cpp 92177 2021-11-02 13:48:55Z vboxsync $ */
2	/** @file
3	* NEM - Native execution manager, native ring-3 Windows backend.
4	*
5	* Log group 2: Exit logging.
6	* Log group 3: Log context on exit.
7	* Log group 5: Ring-3 memory management
8	* Log group 6: Ring-0 memory management
9	* Log group 12: API intercepts.
10	*/
11
12	/*
13	* Copyright (C) 2018-2020 Oracle Corporation
14	*
15	* This file is part of VirtualBox Open Source Edition (OSE), as
16	* available from http://www.virtualbox.org. This file is free software;
17	* you can redistribute it and/or modify it under the terms of the GNU
18	* General Public License (GPL) as published by the Free Software
19	* Foundation, in version 2 as it comes in the "COPYING" file of the
20	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
21	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
22	*/
23
24
25	/*********************************************************************************************************************************
26	* Header Files *
27	*********************************************************************************************************************************/
28	#define LOG_GROUP LOG_GROUP_NEM
29	#define VMCPU_INCL_CPUM_GST_CTX
30	#include <iprt/nt/nt-and-windows.h>
31	#include <iprt/nt/hyperv.h>
32	#include <iprt/nt/vid.h>
33	#include <WinHvPlatform.h>
34
35	#ifndef _WIN32_WINNT_WIN10
36	# error "Missing _WIN32_WINNT_WIN10"
37	#endif
38	#ifndef _WIN32_WINNT_WIN10_RS1 /* Missing define, causing trouble for us. */
39	# define _WIN32_WINNT_WIN10_RS1 (_WIN32_WINNT_WIN10 + 1)
40	#endif
41	#include <sysinfoapi.h>
42	#include <debugapi.h>
43	#include <errhandlingapi.h>
44	#include <fileapi.h>
45	#include <winerror.h> /* no api header for this. */
46
47	#include <VBox/vmm/nem.h>
48	#include <VBox/vmm/iem.h>
49	#include <VBox/vmm/em.h>
50	#include <VBox/vmm/apic.h>
51	#include <VBox/vmm/pdm.h>
52	#include <VBox/vmm/dbgftrace.h>
53	#include "NEMInternal.h"
54	#include <VBox/vmm/vmcc.h>
55
56	#include <iprt/ldr.h>
57	#include <iprt/path.h>
58	#include <iprt/string.h>
59	#include <iprt/system.h>
60	#include <iprt/utf16.h>
61
62	#ifndef NTDDI_WIN10_VB /* Present in W10 2004 SDK, quite possibly earlier. */
63	HRESULT WINAPI WHvQueryGpaRangeDirtyBitmap(WHV_PARTITION_HANDLE, WHV_GUEST_PHYSICAL_ADDRESS, UINT64, UINT64 *, UINT32);
64	# define WHvMapGpaRangeFlagTrackDirtyPages ((WHV_MAP_GPA_RANGE_FLAGS)0x00000008)
65	#endif
66
67
68	/*********************************************************************************************************************************
69	* Defined Constants And Macros *
70	*********************************************************************************************************************************/
71	#ifdef LOG_ENABLED
72	# define NEM_WIN_INTERCEPT_NT_IO_CTLS
73	#endif
74
75	/** VID I/O control detection: Fake partition handle input. */
76	#define NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE ((HANDLE)(uintptr_t)38479125)
77	/** VID I/O control detection: Fake partition ID return. */
78	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID UINT64_C(0xfa1e000042424242)
79	/** VID I/O control detection: The property we get via VidGetPartitionProperty. */
80	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE HvPartitionPropertyProcessorVendor
81	/** VID I/O control detection: Fake property value return. */
82	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE UINT64_C(0xf00dface01020304)
83	/** VID I/O control detection: Fake CPU index input. */
84	#define NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX UINT32_C(42)
85	/** VID I/O control detection: Fake timeout input. */
86	#define NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT UINT32_C(0x00080286)
87
88
89	/*********************************************************************************************************************************
90	* Global Variables *
91	*********************************************************************************************************************************/
92	/** @name APIs imported from WinHvPlatform.dll
93	* @{ */
94	static decltype(WHvGetCapability) * g_pfnWHvGetCapability;
95	static decltype(WHvCreatePartition) * g_pfnWHvCreatePartition;
96	static decltype(WHvSetupPartition) * g_pfnWHvSetupPartition;
97	static decltype(WHvDeletePartition) * g_pfnWHvDeletePartition;
98	static decltype(WHvGetPartitionProperty) * g_pfnWHvGetPartitionProperty;
99	static decltype(WHvSetPartitionProperty) * g_pfnWHvSetPartitionProperty;
100	static decltype(WHvMapGpaRange) * g_pfnWHvMapGpaRange;
101	static decltype(WHvUnmapGpaRange) * g_pfnWHvUnmapGpaRange;
102	static decltype(WHvTranslateGva) * g_pfnWHvTranslateGva;
103	static decltype(WHvQueryGpaRangeDirtyBitmap) * g_pfnWHvQueryGpaRangeDirtyBitmap;
104	#ifndef NEM_WIN_USE_OUR_OWN_RUN_API
105	static decltype(WHvCreateVirtualProcessor) * g_pfnWHvCreateVirtualProcessor;
106	static decltype(WHvDeleteVirtualProcessor) * g_pfnWHvDeleteVirtualProcessor;
107	static decltype(WHvRunVirtualProcessor) * g_pfnWHvRunVirtualProcessor;
108	static decltype(WHvCancelRunVirtualProcessor) * g_pfnWHvCancelRunVirtualProcessor;
109	static decltype(WHvGetVirtualProcessorRegisters) * g_pfnWHvGetVirtualProcessorRegisters;
110	static decltype(WHvSetVirtualProcessorRegisters) * g_pfnWHvSetVirtualProcessorRegisters;
111	#endif
112	/** @} */
113
114	/** @name APIs imported from Vid.dll
115	* @{ */
116	static decltype(VidGetHvPartitionId) *g_pfnVidGetHvPartitionId;
117	static decltype(VidGetPartitionProperty) *g_pfnVidGetPartitionProperty;
118	static decltype(VidStartVirtualProcessor) *g_pfnVidStartVirtualProcessor;
119	static decltype(VidStopVirtualProcessor) *g_pfnVidStopVirtualProcessor;
120	static decltype(VidMessageSlotMap) *g_pfnVidMessageSlotMap;
121	static decltype(VidMessageSlotHandleAndGetNext) *g_pfnVidMessageSlotHandleAndGetNext;
122	#ifdef LOG_ENABLED
123	static decltype(VidGetVirtualProcessorState) *g_pfnVidGetVirtualProcessorState;
124	static decltype(VidSetVirtualProcessorState) *g_pfnVidSetVirtualProcessorState;
125	static decltype(VidGetVirtualProcessorRunningStatus) *g_pfnVidGetVirtualProcessorRunningStatus;
126	#endif
127	/** @} */
128
129	/** The Windows build number. */
130	static uint32_t g_uBuildNo = 17134;
131
132
133
134	/**
135	* Import instructions.
136	*/
137	static const struct
138	{
139	uint8_t idxDll; /*< 0 for WinHvPlatform.dll, 1 for vid.dll. /
140	bool fOptional; /*< Set if import is optional. /
141	PFNRT ppfn; /< The function pointer variable. /
142	const char pszName; /< The function name. /
143	} g_aImports[] =
144	{
145	#define NEM_WIN_IMPORT(a_idxDll, a_fOptional, a_Name) { (a_idxDll), (a_fOptional), (PFNRT *)&RT_CONCAT(g_pfn,a_Name), #a_Name }
146	NEM_WIN_IMPORT(0, false, WHvGetCapability),
147	NEM_WIN_IMPORT(0, false, WHvCreatePartition),
148	NEM_WIN_IMPORT(0, false, WHvSetupPartition),
149	NEM_WIN_IMPORT(0, false, WHvDeletePartition),
150	NEM_WIN_IMPORT(0, false, WHvGetPartitionProperty),
151	NEM_WIN_IMPORT(0, false, WHvSetPartitionProperty),
152	NEM_WIN_IMPORT(0, false, WHvMapGpaRange),
153	NEM_WIN_IMPORT(0, false, WHvUnmapGpaRange),
154	NEM_WIN_IMPORT(0, false, WHvTranslateGva),
155	NEM_WIN_IMPORT(0, true, WHvQueryGpaRangeDirtyBitmap),
156	#ifndef NEM_WIN_USE_OUR_OWN_RUN_API
157	NEM_WIN_IMPORT(0, false, WHvCreateVirtualProcessor),
158	NEM_WIN_IMPORT(0, false, WHvDeleteVirtualProcessor),
159	NEM_WIN_IMPORT(0, false, WHvRunVirtualProcessor),
160	NEM_WIN_IMPORT(0, false, WHvCancelRunVirtualProcessor),
161	NEM_WIN_IMPORT(0, false, WHvGetVirtualProcessorRegisters),
162	NEM_WIN_IMPORT(0, false, WHvSetVirtualProcessorRegisters),
163	#endif
164	NEM_WIN_IMPORT(1, false, VidGetHvPartitionId),
165	NEM_WIN_IMPORT(1, false, VidGetPartitionProperty),
166	NEM_WIN_IMPORT(1, false, VidMessageSlotMap),
167	NEM_WIN_IMPORT(1, false, VidMessageSlotHandleAndGetNext),
168	NEM_WIN_IMPORT(1, false, VidStartVirtualProcessor),
169	NEM_WIN_IMPORT(1, false, VidStopVirtualProcessor),
170	#ifdef LOG_ENABLED
171	NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorState),
172	NEM_WIN_IMPORT(1, false, VidSetVirtualProcessorState),
173	NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorRunningStatus),
174	#endif
175	#undef NEM_WIN_IMPORT
176	};
177
178
179	/** The real NtDeviceIoControlFile API in NTDLL. */
180	static decltype(NtDeviceIoControlFile) *g_pfnNtDeviceIoControlFile;
181	/** Pointer to the NtDeviceIoControlFile import table entry. */
182	static decltype(NtDeviceIoControlFile) **g_ppfnVidNtDeviceIoControlFile;
183	#if defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) \|\| defined(LOG_ENABLED)
184	/** Info about the VidGetHvPartitionId I/O control interface. */
185	static NEMWINIOCTL g_IoCtlGetHvPartitionId;
186	/** Info about the VidGetPartitionProperty I/O control interface. */
187	static NEMWINIOCTL g_IoCtlGetPartitionProperty;
188	#endif
189	#if defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(LOG_ENABLED)
190	/** Info about the VidStartVirtualProcessor I/O control interface. */
191	static NEMWINIOCTL g_IoCtlStartVirtualProcessor;
192	/** Info about the VidStopVirtualProcessor I/O control interface. */
193	static NEMWINIOCTL g_IoCtlStopVirtualProcessor;
194	/** Info about the VidMessageSlotHandleAndGetNext I/O control interface. */
195	static NEMWINIOCTL g_IoCtlMessageSlotHandleAndGetNext;
196	#endif
197	#ifdef LOG_ENABLED
198	/** Info about the VidMessageSlotMap I/O control interface - for logging. */
199	static NEMWINIOCTL g_IoCtlMessageSlotMap;
200	/** Info about the VidGetVirtualProcessorState I/O control interface - for logging. */
201	static NEMWINIOCTL g_IoCtlGetVirtualProcessorState;
202	/** Info about the VidSetVirtualProcessorState I/O control interface - for logging. */
203	static NEMWINIOCTL g_IoCtlSetVirtualProcessorState;
204	/** Pointer to what nemR3WinIoctlDetector_ForLogging should fill in. */
205	static NEMWINIOCTL *g_pIoCtlDetectForLogging;
206	#endif
207
208	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
209	/** Mapping slot for CPU #0.
210	* @{ */
211	static VID_MESSAGE_MAPPING_HEADER *g_pMsgSlotMapping = NULL;
212	static const HV_MESSAGE_HEADER *g_pHvMsgHdr;
213	static const HV_X64_INTERCEPT_MESSAGE_HEADER *g_pX64MsgHdr;
214	/** @} */
215	#endif
216
217
218	/*
219	* Let the preprocessor alias the APIs to import variables for better autocompletion.
220	*/
221	#ifndef IN_SLICKEDIT
222	# define WHvGetCapability g_pfnWHvGetCapability
223	# define WHvCreatePartition g_pfnWHvCreatePartition
224	# define WHvSetupPartition g_pfnWHvSetupPartition
225	# define WHvDeletePartition g_pfnWHvDeletePartition
226	# define WHvGetPartitionProperty g_pfnWHvGetPartitionProperty
227	# define WHvSetPartitionProperty g_pfnWHvSetPartitionProperty
228	# define WHvMapGpaRange g_pfnWHvMapGpaRange
229	# define WHvUnmapGpaRange g_pfnWHvUnmapGpaRange
230	# define WHvTranslateGva g_pfnWHvTranslateGva
231	# define WHvQueryGpaRangeDirtyBitmap g_pfnWHvQueryGpaRangeDirtyBitmap
232	# define WHvCreateVirtualProcessor g_pfnWHvCreateVirtualProcessor
233	# define WHvDeleteVirtualProcessor g_pfnWHvDeleteVirtualProcessor
234	# define WHvRunVirtualProcessor g_pfnWHvRunVirtualProcessor
235	# define WHvGetRunExitContextSize g_pfnWHvGetRunExitContextSize
236	# define WHvCancelRunVirtualProcessor g_pfnWHvCancelRunVirtualProcessor
237	# define WHvGetVirtualProcessorRegisters g_pfnWHvGetVirtualProcessorRegisters
238	# define WHvSetVirtualProcessorRegisters g_pfnWHvSetVirtualProcessorRegisters
239
240	# define VidMessageSlotHandleAndGetNext g_pfnVidMessageSlotHandleAndGetNext
241	# define VidStartVirtualProcessor g_pfnVidStartVirtualProcessor
242	# define VidStopVirtualProcessor g_pfnVidStopVirtualProcessor
243
244	#endif
245
246	/** WHV_MEMORY_ACCESS_TYPE names */
247	static const char * const g_apszWHvMemAccesstypes[4] = { "read", "write", "exec", "!undefined!" };
248
249
250	/*********************************************************************************************************************************
251	* Internal Functions *
252	*********************************************************************************************************************************/
253	DECLINLINE(int) nemR3NativeGCPhys2R3PtrReadOnly(PVM pVM, RTGCPHYS GCPhys, const void **ppv);
254	DECLINLINE(int) nemR3NativeGCPhys2R3PtrWriteable(PVM pVM, RTGCPHYS GCPhys, void **ppv);
255
256	/*
257	* Instantate the code we share with ring-0.
258	*/
259	#ifdef NEM_WIN_USE_OUR_OWN_RUN_API
260	# define NEM_WIN_TEMPLATE_MODE_OWN_RUN_API
261	#else
262	# undef NEM_WIN_TEMPLATE_MODE_OWN_RUN_API
263	#endif
264	#include "../VMMAll/NEMAllNativeTemplate-win.cpp.h"
265
266
267
268	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
269	/**
270	* Wrapper that logs the call from VID.DLL.
271	*
272	* This is very handy for figuring out why an API call fails.
273	*/
274	static NTSTATUS WINAPI
275	nemR3WinLogWrapper_NtDeviceIoControlFile(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
276	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
277	PVOID pvOutput, ULONG cbOutput)
278	{
279
280	char szFunction[32];
281	const char *pszFunction;
282	if (uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction)
283	pszFunction = "VidMessageSlotHandleAndGetNext";
284	else if (uFunction == g_IoCtlStartVirtualProcessor.uFunction)
285	pszFunction = "VidStartVirtualProcessor";
286	else if (uFunction == g_IoCtlStopVirtualProcessor.uFunction)
287	pszFunction = "VidStopVirtualProcessor";
288	else if (uFunction == g_IoCtlMessageSlotMap.uFunction)
289	pszFunction = "VidMessageSlotMap";
290	else if (uFunction == g_IoCtlGetVirtualProcessorState.uFunction)
291	pszFunction = "VidGetVirtualProcessorState";
292	else if (uFunction == g_IoCtlSetVirtualProcessorState.uFunction)
293	pszFunction = "VidSetVirtualProcessorState";
294	else
295	{
296	RTStrPrintf(szFunction, sizeof(szFunction), "%#x", uFunction);
297	pszFunction = szFunction;
298	}
299
300	if (cbInput > 0 && pvInput)
301	Log12(("VID!NtDeviceIoControlFile: %s/input: %.*Rhxs\n", pszFunction, RT_MIN(cbInput, 32), pvInput));
302	NTSTATUS rcNt = g_pfnNtDeviceIoControlFile(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, uFunction,
303	pvInput, cbInput, pvOutput, cbOutput);
304	if (!hEvt && !pfnApcCallback && !pvApcCtx)
305	Log12(("VID!NtDeviceIoControlFile: hFile=%#zx pIos=%p->{s:%#x, i:%#zx} uFunction=%s Input=%p LB %#x Output=%p LB %#x) -> %#x; Caller=%p\n",
306	hFile, pIos, pIos->Status, pIos->Information, pszFunction, pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress()));
307	else
308	Log12(("VID!NtDeviceIoControlFile: hFile=%#zx hEvt=%#zx Apc=%p/%p pIos=%p->{s:%#x, i:%#zx} uFunction=%s Input=%p LB %#x Output=%p LB %#x) -> %#x; Caller=%p\n",
309	hFile, hEvt, RT_CB_LOG_CAST(pfnApcCallback), pvApcCtx, pIos, pIos->Status, pIos->Information, pszFunction,
310	pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress()));
311	if (cbOutput > 0 && pvOutput)
312	{
313	Log12(("VID!NtDeviceIoControlFile: %s/output: %.*Rhxs\n", pszFunction, RT_MIN(cbOutput, 32), pvOutput));
314	if (uFunction == 0x2210cc && g_pMsgSlotMapping == NULL && cbOutput >= sizeof(void *))
315	{
316	g_pMsgSlotMapping = (VID_MESSAGE_MAPPING_HEADER *)pvOutput;
317	g_pHvMsgHdr = (const HV_MESSAGE_HEADER *)(g_pMsgSlotMapping + 1);
318	g_pX64MsgHdr = (const HV_X64_INTERCEPT_MESSAGE_HEADER *)(g_pHvMsgHdr + 1);
319	Log12(("VID!NtDeviceIoControlFile: Message slot mapping: %p\n", g_pMsgSlotMapping));
320	}
321	}
322	if ( g_pMsgSlotMapping
323	&& ( uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction
324	\|\| uFunction == g_IoCtlStopVirtualProcessor.uFunction
325	\|\| uFunction == g_IoCtlMessageSlotMap.uFunction
326	))
327	Log12(("VID!NtDeviceIoControlFile: enmVidMsgType=%#x cb=%#x msg=%#x payload=%u cs:rip=%04x:%08RX64 (%s)\n",
328	g_pMsgSlotMapping->enmVidMsgType, g_pMsgSlotMapping->cbMessage,
329	g_pHvMsgHdr->MessageType, g_pHvMsgHdr->PayloadSize,
330	g_pX64MsgHdr->CsSegment.Selector, g_pX64MsgHdr->Rip, pszFunction));
331
332	return rcNt;
333	}
334	#endif /* NEM_WIN_INTERCEPT_NT_IO_CTLS */
335
336
337	/**
338	* Patches the call table of VID.DLL so we can intercept NtDeviceIoControlFile.
339	*
340	* This is for used to figure out the I/O control codes and in logging builds
341	* for logging API calls that WinHvPlatform.dll does.
342	*
343	* @returns VBox status code.
344	* @param hLdrModVid The VID module handle.
345	* @param pErrInfo Where to return additional error information.
346	*/
347	static int nemR3WinInitVidIntercepts(RTLDRMOD hLdrModVid, PRTERRINFO pErrInfo)
348	{
349	/*
350	* Locate the real API.
351	*/
352	g_pfnNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) *)RTLdrGetSystemSymbol("NTDLL.DLL", "NtDeviceIoControlFile");
353	AssertReturn(g_pfnNtDeviceIoControlFile != NULL,
354	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to resolve NtDeviceIoControlFile from NTDLL.DLL"));
355
356	/*
357	* Locate the PE header and get what we need from it.
358	*/
359	uint8_t const pbImage = (uint8_t const )RTLdrGetNativeHandle(hLdrModVid);
360	IMAGE_DOS_HEADER const pMzHdr = (IMAGE_DOS_HEADER const )pbImage;
361	AssertReturn(pMzHdr->e_magic == IMAGE_DOS_SIGNATURE,
362	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL mapping doesn't start with MZ signature: %#x", pMzHdr->e_magic));
363	IMAGE_NT_HEADERS const pNtHdrs = (IMAGE_NT_HEADERS const )&pbImage[pMzHdr->e_lfanew];
364	AssertReturn(pNtHdrs->Signature == IMAGE_NT_SIGNATURE,
365	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL has invalid PE signaturre: %#x @%#x",
366	pNtHdrs->Signature, pMzHdr->e_lfanew));
367
368	uint32_t const cbImage = pNtHdrs->OptionalHeader.SizeOfImage;
369	IMAGE_DATA_DIRECTORY const ImportDir = pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
370
371	/*
372	* Walk the import descriptor table looking for NTDLL.DLL.
373	*/
374	AssertReturn( ImportDir.Size > 0
375	&& ImportDir.Size < cbImage,
376	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory size: %#x", ImportDir.Size));
377	AssertReturn( ImportDir.VirtualAddress > 0
378	&& ImportDir.VirtualAddress <= cbImage - ImportDir.Size,
379	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory RVA: %#x", ImportDir.VirtualAddress));
380
381	for (PIMAGE_IMPORT_DESCRIPTOR pImps = (PIMAGE_IMPORT_DESCRIPTOR)&pbImage[ImportDir.VirtualAddress];
382	pImps->Name != 0 && pImps->FirstThunk != 0;
383	pImps++)
384	{
385	AssertReturn(pImps->Name < cbImage,
386	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory entry name: %#x", pImps->Name));
387	const char pszModName = (const char )&pbImage[pImps->Name];
388	if (RTStrICmpAscii(pszModName, "ntdll.dll"))
389	continue;
390	AssertReturn(pImps->FirstThunk < cbImage,
391	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk));
392	AssertReturn(pImps->OriginalFirstThunk < cbImage,
393	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk));
394
395	/*
396	* Walk the thunks table(s) looking for NtDeviceIoControlFile.
397	*/
398	uintptr_t puFirstThunk = (uintptr_t )&pbImage[pImps->FirstThunk]; /* update this. */
399	if ( pImps->OriginalFirstThunk != 0
400	&& pImps->OriginalFirstThunk != pImps->FirstThunk)
401	{
402	uintptr_t const puOrgThunk = (uintptr_t const )&pbImage[pImps->OriginalFirstThunk]; /* read from this. */
403	uintptr_t cLeft = (cbImage - (RT_MAX(pImps->FirstThunk, pImps->OriginalFirstThunk)))
404	/ sizeof(*puFirstThunk);
405	while (cLeft-- > 0 && *puOrgThunk != 0)
406	{
407	if (!(puOrgThunk & IMAGE_ORDINAL_FLAG64)) / ASSUMES 64-bit */
408	{
409	AssertReturn(puOrgThunk > 0 && puOrgThunk < cbImage,
410	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad thunk entry: %#x", *puOrgThunk));
411
412	const char pszSymbol = (const char )&pbImage[*puOrgThunk + 2];
413	if (strcmp(pszSymbol, "NtDeviceIoControlFile") == 0)
414	g_ppfnVidNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) **)puFirstThunk;
415	}
416
417	puOrgThunk++;
418	puFirstThunk++;
419	}
420	}
421	else
422	{
423	/* No original thunk table, so scan the resolved symbols for a match
424	with the NtDeviceIoControlFile address. */
425	uintptr_t const uNeedle = (uintptr_t)g_pfnNtDeviceIoControlFile;
426	uintptr_t cLeft = (cbImage - pImps->FirstThunk) / sizeof(*puFirstThunk);
427	while (cLeft-- > 0 && *puFirstThunk != 0)
428	{
429	if (*puFirstThunk == uNeedle)
430	g_ppfnVidNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) **)puFirstThunk;
431	puFirstThunk++;
432	}
433	}
434	}
435
436	if (g_ppfnVidNtDeviceIoControlFile != NULL)
437	{
438	/* Make the thunk writable we can freely modify it. */
439	DWORD fOldProt = PAGE_READONLY;
440	VirtualProtect((void *)(uintptr_t)g_ppfnVidNtDeviceIoControlFile, sizeof(uintptr_t), PAGE_EXECUTE_READWRITE, &fOldProt);
441
442	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
443	*g_ppfnVidNtDeviceIoControlFile = nemR3WinLogWrapper_NtDeviceIoControlFile;
444	#endif
445	return VINF_SUCCESS;
446	}
447	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to patch NtDeviceIoControlFile import in VID.DLL!");
448	}
449
450
451	/**
452	* Worker for nemR3NativeInit that probes and load the native API.
453	*
454	* @returns VBox status code.
455	* @param fForced Whether the HMForced flag is set and we should
456	* fail if we cannot initialize.
457	* @param pErrInfo Where to always return error info.
458	*/
459	static int nemR3WinInitProbeAndLoad(bool fForced, PRTERRINFO pErrInfo)
460	{
461	/*
462	* Check that the DLL files we need are present, but without loading them.
463	* We'd like to avoid loading them unnecessarily.
464	*/
465	WCHAR wszPath[MAX_PATH + 64];
466	UINT cwcPath = GetSystemDirectoryW(wszPath, MAX_PATH);
467	if (cwcPath >= MAX_PATH \|\| cwcPath < 2)
468	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "GetSystemDirectoryW failed (%#x / %u)", cwcPath, GetLastError());
469
470	if (wszPath[cwcPath - 1] != '\\' \|\| wszPath[cwcPath - 1] != '/')
471	wszPath[cwcPath++] = '\\';
472	RTUtf16CopyAscii(&wszPath[cwcPath], RT_ELEMENTS(wszPath) - cwcPath, "WinHvPlatform.dll");
473	if (GetFileAttributesW(wszPath) == INVALID_FILE_ATTRIBUTES)
474	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "The native API dll was not found (%ls)", wszPath);
475
476	/*
477	* Check that we're in a VM and that the hypervisor identifies itself as Hyper-V.
478	*/
479	if (!ASMHasCpuId())
480	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID support");
481	if (!ASMIsValidStdRange(ASMCpuId_EAX(0)))
482	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID leaf #1");
483	if (!(ASMCpuId_ECX(1) & X86_CPUID_FEATURE_ECX_HVP))
484	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Not in a hypervisor partition (HVP=0)");
485
486	uint32_t cMaxHyperLeaf = 0;
487	uint32_t uEbx = 0;
488	uint32_t uEcx = 0;
489	uint32_t uEdx = 0;
490	ASMCpuIdExSlow(0x40000000, 0, 0, 0, &cMaxHyperLeaf, &uEbx, &uEcx, &uEdx);
491	if (!ASMIsValidHypervisorRange(cMaxHyperLeaf))
492	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Invalid hypervisor CPUID range (%#x %#x %#x %#x)",
493	cMaxHyperLeaf, uEbx, uEcx, uEdx);
494	if ( uEbx != UINT32_C(0x7263694d) /* Micr */
495	\|\| uEcx != UINT32_C(0x666f736f) /* osof */
496	\|\| uEdx != UINT32_C(0x76482074) /* t Hv */)
497	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE,
498	"Not Hyper-V CPUID signature: %#x %#x %#x (expected %#x %#x %#x)",
499	uEbx, uEcx, uEdx, UINT32_C(0x7263694d), UINT32_C(0x666f736f), UINT32_C(0x76482074));
500	if (cMaxHyperLeaf < UINT32_C(0x40000005))
501	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Too narrow hypervisor CPUID range (%#x)", cMaxHyperLeaf);
502
503	/** @todo would be great if we could recognize a root partition from the
504	* CPUID info, but I currently don't dare do that. */
505
506	/*
507	* Now try load the DLLs and resolve the APIs.
508	*/
509	static const char * const s_apszDllNames[2] = { "WinHvPlatform.dll", "vid.dll" };
510	RTLDRMOD ahMods[2] = { NIL_RTLDRMOD, NIL_RTLDRMOD };
511	int rc = VINF_SUCCESS;
512	for (unsigned i = 0; i < RT_ELEMENTS(s_apszDllNames); i++)
513	{
514	int rc2 = RTLdrLoadSystem(s_apszDllNames[i], true /fNoUnload/, &ahMods[i]);
515	if (RT_FAILURE(rc2))
516	{
517	if (!RTErrInfoIsSet(pErrInfo))
518	RTErrInfoSetF(pErrInfo, rc2, "Failed to load API DLL: %s: %Rrc", s_apszDllNames[i], rc2);
519	else
520	RTErrInfoAddF(pErrInfo, rc2, "; %s: %Rrc", s_apszDllNames[i], rc2);
521	ahMods[i] = NIL_RTLDRMOD;
522	rc = VERR_NEM_INIT_FAILED;
523	}
524	}
525	if (RT_SUCCESS(rc))
526	rc = nemR3WinInitVidIntercepts(ahMods[1], pErrInfo);
527	if (RT_SUCCESS(rc))
528	{
529	for (unsigned i = 0; i < RT_ELEMENTS(g_aImports); i++)
530	{
531	int rc2 = RTLdrGetSymbol(ahMods[g_aImports[i].idxDll], g_aImports[i].pszName, (void **)g_aImports[i].ppfn);
532	if (RT_SUCCESS(rc2))
533	{
534	if (g_aImports[i].fOptional)
535	LogRel(("NEM: info: Found optional import %s!%s.\n",
536	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName));
537	}
538	else
539	{
540	*g_aImports[i].ppfn = NULL;
541
542	LogRel(("NEM: %s: Failed to import %s!%s: %Rrc",
543	g_aImports[i].fOptional ? "info" : fForced ? "fatal" : "error",
544	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName, rc2));
545	if (!g_aImports[i].fOptional)
546	{
547	if (RTErrInfoIsSet(pErrInfo))
548	RTErrInfoAddF(pErrInfo, rc2, ", %s!%s",
549	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName);
550	else
551	rc = RTErrInfoSetF(pErrInfo, rc2, "Failed to import: %s!%s",
552	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName);
553	Assert(RT_FAILURE(rc));
554	}
555	}
556	}
557	if (RT_SUCCESS(rc))
558	{
559	Assert(!RTErrInfoIsSet(pErrInfo));
560	}
561	}
562
563	for (unsigned i = 0; i < RT_ELEMENTS(ahMods); i++)
564	RTLdrClose(ahMods[i]);
565	return rc;
566	}
567
568
569	/**
570	* Wrapper for different WHvGetCapability signatures.
571	*/
572	DECLINLINE(HRESULT) WHvGetCapabilityWrapper(WHV_CAPABILITY_CODE enmCap, WHV_CAPABILITY *pOutput, uint32_t cbOutput)
573	{
574	return g_pfnWHvGetCapability(enmCap, pOutput, cbOutput, NULL);
575	}
576
577
578	/**
579	* Worker for nemR3NativeInit that gets the hypervisor capabilities.
580	*
581	* @returns VBox status code.
582	* @param pVM The cross context VM structure.
583	* @param pErrInfo Where to always return error info.
584	*/
585	static int nemR3WinInitCheckCapabilities(PVM pVM, PRTERRINFO pErrInfo)
586	{
587	#define NEM_LOG_REL_CAP_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %-38s= " a_szFmt "\n", a_szField, a_Value))
588	#define NEM_LOG_REL_CAP_SUB_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %36s: " a_szFmt "\n", a_szField, a_Value))
589	#define NEM_LOG_REL_CAP_SUB(a_szField, a_Value) NEM_LOG_REL_CAP_SUB_EX(a_szField, "%d", a_Value)
590
591	/*
592	* Is the hypervisor present with the desired capability?
593	*
594	* In build 17083 this translates into:
595	* - CPUID[0x00000001].HVP is set
596	* - CPUID[0x40000000] == "Microsoft Hv"
597	* - CPUID[0x40000001].eax == "Hv#1"
598	* - CPUID[0x40000003].ebx[12] is set.
599	* - VidGetExoPartitionProperty(INVALID_HANDLE_VALUE, 0x60000, &Ignored) returns
600	* a non-zero value.
601	*/
602	/**
603	* @todo Someone at Microsoft please explain weird API design:
604	* 1. Pointless CapabilityCode duplication int the output;
605	* 2. No output size.
606	*/
607	WHV_CAPABILITY Caps;
608	RT_ZERO(Caps);
609	SetLastError(0);
610	HRESULT hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeHypervisorPresent, &Caps, sizeof(Caps));
611	DWORD rcWin = GetLastError();
612	if (FAILED(hrc))
613	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
614	"WHvGetCapability/WHvCapabilityCodeHypervisorPresent failed: %Rhrc (Last=%#x/%u)",
615	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
616	if (!Caps.HypervisorPresent)
617	{
618	if (!RTPathExists(RTPATH_NT_PASSTHRU_PREFIX "Device\\VidExo"))
619	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE,
620	"WHvCapabilityCodeHypervisorPresent is FALSE! Make sure you have enabled the 'Windows Hypervisor Platform' feature.");
621	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "WHvCapabilityCodeHypervisorPresent is FALSE! (%u)", rcWin);
622	}
623	LogRel(("NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...\n"));
624
625
626	/*
627	* Check what extended VM exits are supported.
628	*/
629	RT_ZERO(Caps);
630	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExtendedVmExits, &Caps, sizeof(Caps));
631	if (FAILED(hrc))
632	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
633	"WHvGetCapability/WHvCapabilityCodeExtendedVmExits failed: %Rhrc (Last=%#x/%u)",
634	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
635	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeExtendedVmExits", "%'#018RX64", Caps.ExtendedVmExits.AsUINT64);
636	pVM->nem.s.fExtendedMsrExit = RT_BOOL(Caps.ExtendedVmExits.X64MsrExit);
637	pVM->nem.s.fExtendedCpuIdExit = RT_BOOL(Caps.ExtendedVmExits.X64CpuidExit);
638	pVM->nem.s.fExtendedXcptExit = RT_BOOL(Caps.ExtendedVmExits.ExceptionExit);
639	NEM_LOG_REL_CAP_SUB("fExtendedMsrExit", pVM->nem.s.fExtendedMsrExit);
640	NEM_LOG_REL_CAP_SUB("fExtendedCpuIdExit", pVM->nem.s.fExtendedCpuIdExit);
641	NEM_LOG_REL_CAP_SUB("fExtendedXcptExit", pVM->nem.s.fExtendedXcptExit);
642	if (Caps.ExtendedVmExits.AsUINT64 & ~(uint64_t)7)
643	LogRel(("NEM: Warning! Unknown VM exit definitions: %#RX64\n", Caps.ExtendedVmExits.AsUINT64));
644	/** @todo RECHECK: WHV_EXTENDED_VM_EXITS typedef. */
645
646	/*
647	* Check features in case they end up defining any.
648	*/
649	RT_ZERO(Caps);
650	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeFeatures, &Caps, sizeof(Caps));
651	if (FAILED(hrc))
652	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
653	"WHvGetCapability/WHvCapabilityCodeFeatures failed: %Rhrc (Last=%#x/%u)",
654	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
655	if (Caps.Features.AsUINT64 & ~(uint64_t)0)
656	LogRel(("NEM: Warning! Unknown feature definitions: %#RX64\n", Caps.Features.AsUINT64));
657	/** @todo RECHECK: WHV_CAPABILITY_FEATURES typedef. */
658
659	/*
660	* Check supported exception exit bitmap bits.
661	* We don't currently require this, so we just log failure.
662	*/
663	RT_ZERO(Caps);
664	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExceptionExitBitmap, &Caps, sizeof(Caps));
665	if (SUCCEEDED(hrc))
666	LogRel(("NEM: Supported exception exit bitmap: %#RX64\n", Caps.ExceptionExitBitmap));
667	else
668	LogRel(("NEM: Warning! WHvGetCapability/WHvCapabilityCodeExceptionExitBitmap failed: %Rhrc (Last=%#x/%u)",
669	hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
670
671	/*
672	* Check that the CPU vendor is supported.
673	*/
674	RT_ZERO(Caps);
675	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorVendor, &Caps, sizeof(Caps));
676	if (FAILED(hrc))
677	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
678	"WHvGetCapability/WHvCapabilityCodeProcessorVendor failed: %Rhrc (Last=%#x/%u)",
679	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
680	switch (Caps.ProcessorVendor)
681	{
682	/** @todo RECHECK: WHV_PROCESSOR_VENDOR typedef. */
683	case WHvProcessorVendorIntel:
684	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - Intel", Caps.ProcessorVendor);
685	pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_INTEL;
686	break;
687	case WHvProcessorVendorAmd:
688	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - AMD", Caps.ProcessorVendor);
689	pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_AMD;
690	break;
691	default:
692	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d", Caps.ProcessorVendor);
693	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unknown processor vendor: %d", Caps.ProcessorVendor);
694	}
695
696	/*
697	* CPU features, guessing these are virtual CPU features?
698	*/
699	RT_ZERO(Caps);
700	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorFeatures, &Caps, sizeof(Caps));
701	if (FAILED(hrc))
702	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
703	"WHvGetCapability/WHvCapabilityCodeProcessorFeatures failed: %Rhrc (Last=%#x/%u)",
704	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
705	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorFeatures", "%'#018RX64", Caps.ProcessorFeatures.AsUINT64);
706	#define NEM_LOG_REL_CPU_FEATURE(a_Field) NEM_LOG_REL_CAP_SUB(#a_Field, Caps.ProcessorFeatures.a_Field)
707	NEM_LOG_REL_CPU_FEATURE(Sse3Support);
708	NEM_LOG_REL_CPU_FEATURE(LahfSahfSupport);
709	NEM_LOG_REL_CPU_FEATURE(Ssse3Support);
710	NEM_LOG_REL_CPU_FEATURE(Sse4_1Support);
711	NEM_LOG_REL_CPU_FEATURE(Sse4_2Support);
712	NEM_LOG_REL_CPU_FEATURE(Sse4aSupport);
713	NEM_LOG_REL_CPU_FEATURE(XopSupport);
714	NEM_LOG_REL_CPU_FEATURE(PopCntSupport);
715	NEM_LOG_REL_CPU_FEATURE(Cmpxchg16bSupport);
716	NEM_LOG_REL_CPU_FEATURE(Altmovcr8Support);
717	NEM_LOG_REL_CPU_FEATURE(LzcntSupport);
718	NEM_LOG_REL_CPU_FEATURE(MisAlignSseSupport);
719	NEM_LOG_REL_CPU_FEATURE(MmxExtSupport);
720	NEM_LOG_REL_CPU_FEATURE(Amd3DNowSupport);
721	NEM_LOG_REL_CPU_FEATURE(ExtendedAmd3DNowSupport);
722	NEM_LOG_REL_CPU_FEATURE(Page1GbSupport);
723	NEM_LOG_REL_CPU_FEATURE(AesSupport);
724	NEM_LOG_REL_CPU_FEATURE(PclmulqdqSupport);
725	NEM_LOG_REL_CPU_FEATURE(PcidSupport);
726	NEM_LOG_REL_CPU_FEATURE(Fma4Support);
727	NEM_LOG_REL_CPU_FEATURE(F16CSupport);
728	NEM_LOG_REL_CPU_FEATURE(RdRandSupport);
729	NEM_LOG_REL_CPU_FEATURE(RdWrFsGsSupport);
730	NEM_LOG_REL_CPU_FEATURE(SmepSupport);
731	NEM_LOG_REL_CPU_FEATURE(EnhancedFastStringSupport);
732	NEM_LOG_REL_CPU_FEATURE(Bmi1Support);
733	NEM_LOG_REL_CPU_FEATURE(Bmi2Support);
734	/* two reserved bits here, see below */
735	NEM_LOG_REL_CPU_FEATURE(MovbeSupport);
736	NEM_LOG_REL_CPU_FEATURE(Npiep1Support);
737	NEM_LOG_REL_CPU_FEATURE(DepX87FPUSaveSupport);
738	NEM_LOG_REL_CPU_FEATURE(RdSeedSupport);
739	NEM_LOG_REL_CPU_FEATURE(AdxSupport);
740	NEM_LOG_REL_CPU_FEATURE(IntelPrefetchSupport);
741	NEM_LOG_REL_CPU_FEATURE(SmapSupport);
742	NEM_LOG_REL_CPU_FEATURE(HleSupport);
743	NEM_LOG_REL_CPU_FEATURE(RtmSupport);
744	NEM_LOG_REL_CPU_FEATURE(RdtscpSupport);
745	NEM_LOG_REL_CPU_FEATURE(ClflushoptSupport);
746	NEM_LOG_REL_CPU_FEATURE(ClwbSupport);
747	NEM_LOG_REL_CPU_FEATURE(ShaSupport);
748	NEM_LOG_REL_CPU_FEATURE(X87PointersSavedSupport);
749	#undef NEM_LOG_REL_CPU_FEATURE
750	if (Caps.ProcessorFeatures.AsUINT64 & (~(RT_BIT_64(43) - 1) \| RT_BIT_64(27) \| RT_BIT_64(28)))
751	LogRel(("NEM: Warning! Unknown CPU features: %#RX64\n", Caps.ProcessorFeatures.AsUINT64));
752	pVM->nem.s.uCpuFeatures.u64 = Caps.ProcessorFeatures.AsUINT64;
753	/** @todo RECHECK: WHV_PROCESSOR_FEATURES typedef. */
754
755	/*
756	* The cache line flush size.
757	*/
758	RT_ZERO(Caps);
759	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorClFlushSize, &Caps, sizeof(Caps));
760	if (FAILED(hrc))
761	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
762	"WHvGetCapability/WHvCapabilityCodeProcessorClFlushSize failed: %Rhrc (Last=%#x/%u)",
763	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
764	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorClFlushSize", "2^%u", Caps.ProcessorClFlushSize);
765	if (Caps.ProcessorClFlushSize < 8 && Caps.ProcessorClFlushSize > 9)
766	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unsupported cache line flush size: %u", Caps.ProcessorClFlushSize);
767	pVM->nem.s.cCacheLineFlushShift = Caps.ProcessorClFlushSize;
768
769	/*
770	* See if they've added more properties that we're not aware of.
771	*/
772	/** @todo RECHECK: WHV_CAPABILITY_CODE typedef. */
773	if (!IsDebuggerPresent()) /* Too noisy when in debugger, so skip. */
774	{
775	static const struct
776	{
777	uint32_t iMin, iMax; } s_aUnknowns[] =
778	{
779	{ 0x0004, 0x000f },
780	{ 0x1003, 0x100f },
781	{ 0x2000, 0x200f },
782	{ 0x3000, 0x300f },
783	{ 0x4000, 0x400f },
784	};
785	for (uint32_t j = 0; j < RT_ELEMENTS(s_aUnknowns); j++)
786	for (uint32_t i = s_aUnknowns[j].iMin; i <= s_aUnknowns[j].iMax; i++)
787	{
788	RT_ZERO(Caps);
789	hrc = WHvGetCapabilityWrapper((WHV_CAPABILITY_CODE)i, &Caps, sizeof(Caps));
790	if (SUCCEEDED(hrc))
791	LogRel(("NEM: Warning! Unknown capability %#x returning: %.*Rhxs\n", i, sizeof(Caps), &Caps));
792	}
793	}
794
795	/*
796	* For proper operation, we require CPUID exits.
797	*/
798	if (!pVM->nem.s.fExtendedCpuIdExit)
799	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended CPUID exit support");
800	if (!pVM->nem.s.fExtendedMsrExit)
801	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended MSR exit support");
802	if (!pVM->nem.s.fExtendedXcptExit)
803	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended exception exit support");
804
805	#undef NEM_LOG_REL_CAP_EX
806	#undef NEM_LOG_REL_CAP_SUB_EX
807	#undef NEM_LOG_REL_CAP_SUB
808	return VINF_SUCCESS;
809	}
810
811	#if defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) \|\| defined(LOG_ENABLED)
812
813	/**
814	* Used to fill in g_IoCtlGetHvPartitionId.
815	*/
816	static NTSTATUS WINAPI
817	nemR3WinIoctlDetector_GetHvPartitionId(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
818	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
819	PVOID pvOutput, ULONG cbOutput)
820	{
821	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
822	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
823	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
824	AssertLogRelMsgReturn(cbInput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
825	RT_NOREF(pvInput);
826
827	AssertLogRelMsgReturn(RT_VALID_PTR(pvOutput), ("pvOutput=%p\n", pvOutput), STATUS_INVALID_PARAMETER_9);
828	AssertLogRelMsgReturn(cbOutput == sizeof(HV_PARTITION_ID), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
829	(HV_PARTITION_ID )pvOutput = NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID;
830
831	g_IoCtlGetHvPartitionId.cbInput = cbInput;
832	g_IoCtlGetHvPartitionId.cbOutput = cbOutput;
833	g_IoCtlGetHvPartitionId.uFunction = uFunction;
834
835	return STATUS_SUCCESS;
836	}
837
838
839	/**
840	* Used to fill in g_IoCtlGetHvPartitionId.
841	*/
842	static NTSTATUS WINAPI
843	nemR3WinIoctlDetector_GetPartitionProperty(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
844	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
845	PVOID pvOutput, ULONG cbOutput)
846	{
847	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
848	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
849	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
850	AssertLogRelMsgReturn(cbInput == sizeof(VID_PARTITION_PROPERTY_CODE), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
851	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
852	AssertLogRelMsgReturn((VID_PARTITION_PROPERTY_CODE )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE,
853	("pvInput=%#x, expected %#x\n", (HV_PARTITION_PROPERTY_CODE *)pvInput,
854	NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE), STATUS_INVALID_PARAMETER_9);
855	AssertLogRelMsgReturn(RT_VALID_PTR(pvOutput), ("pvOutput=%p\n", pvOutput), STATUS_INVALID_PARAMETER_9);
856	AssertLogRelMsgReturn(cbOutput == sizeof(HV_PARTITION_PROPERTY), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
857	(HV_PARTITION_PROPERTY )pvOutput = NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE;
858
859	g_IoCtlGetPartitionProperty.cbInput = cbInput;
860	g_IoCtlGetPartitionProperty.cbOutput = cbOutput;
861	g_IoCtlGetPartitionProperty.uFunction = uFunction;
862
863	return STATUS_SUCCESS;
864	}
865
866	#endif /* defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) \|\| defined(LOG_ENABLED) */
867	#if defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(LOG_ENABLED)
868
869	/**
870	* Used to fill in g_IoCtlStartVirtualProcessor.
871	*/
872	static NTSTATUS WINAPI
873	nemR3WinIoctlDetector_StartVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
874	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
875	PVOID pvOutput, ULONG cbOutput)
876	{
877	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
878	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
879	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
880	AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
881	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
882	AssertLogRelMsgReturn((HV_VP_INDEX )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
883	("piCpu=%u\n", (HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9);
884	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
885	RT_NOREF(pvOutput);
886
887	g_IoCtlStartVirtualProcessor.cbInput = cbInput;
888	g_IoCtlStartVirtualProcessor.cbOutput = cbOutput;
889	g_IoCtlStartVirtualProcessor.uFunction = uFunction;
890
891	return STATUS_SUCCESS;
892	}
893
894
895	/**
896	* Used to fill in g_IoCtlStartVirtualProcessor.
897	*/
898	static NTSTATUS WINAPI
899	nemR3WinIoctlDetector_StopVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
900	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
901	PVOID pvOutput, ULONG cbOutput)
902	{
903	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
904	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
905	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
906	AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
907	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
908	AssertLogRelMsgReturn((HV_VP_INDEX )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
909	("piCpu=%u\n", (HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9);
910	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
911	RT_NOREF(pvOutput);
912
913	g_IoCtlStopVirtualProcessor.cbInput = cbInput;
914	g_IoCtlStopVirtualProcessor.cbOutput = cbOutput;
915	g_IoCtlStopVirtualProcessor.uFunction = uFunction;
916
917	return STATUS_SUCCESS;
918	}
919
920
921	/**
922	* Used to fill in g_IoCtlMessageSlotHandleAndGetNext
923	*/
924	static NTSTATUS WINAPI
925	nemR3WinIoctlDetector_MessageSlotHandleAndGetNext(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
926	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
927	PVOID pvOutput, ULONG cbOutput)
928	{
929	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
930	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
931	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
932
933	if (g_uBuildNo >= 17758)
934	{
935	/* No timeout since about build 17758, it's now always an infinite wait. So, a somewhat compatible change. */
936	AssertLogRelMsgReturn(cbInput == RT_UOFFSETOF(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT, cMillies),
937	("cbInput=%#x\n", cbInput),
938	STATUS_INVALID_PARAMETER_8);
939	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
940	PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput;
941	AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX
942	&& pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE,
943	("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies),
944	STATUS_INVALID_PARAMETER_9);
945	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
946	}
947	else
948	{
949	AssertLogRelMsgReturn(cbInput == sizeof(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT), ("cbInput=%#x\n", cbInput),
950	STATUS_INVALID_PARAMETER_8);
951	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
952	PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput;
953	AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX
954	&& pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE
955	&& pVidIn->cMillies == NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT,
956	("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies),
957	STATUS_INVALID_PARAMETER_9);
958	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
959	RT_NOREF(pvOutput);
960	}
961
962	g_IoCtlMessageSlotHandleAndGetNext.cbInput = cbInput;
963	g_IoCtlMessageSlotHandleAndGetNext.cbOutput = cbOutput;
964	g_IoCtlMessageSlotHandleAndGetNext.uFunction = uFunction;
965
966	return STATUS_SUCCESS;
967	}
968
969	#endif /* defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(LOG_ENABLED) */
970
971	#ifdef LOG_ENABLED
972	/**
973	* Used to fill in what g_pIoCtlDetectForLogging points to.
974	*/
975	static NTSTATUS WINAPI nemR3WinIoctlDetector_ForLogging(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
976	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
977	PVOID pvOutput, ULONG cbOutput)
978	{
979	RT_NOREF(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, pvInput, pvOutput);
980
981	g_pIoCtlDetectForLogging->cbInput = cbInput;
982	g_pIoCtlDetectForLogging->cbOutput = cbOutput;
983	g_pIoCtlDetectForLogging->uFunction = uFunction;
984
985	return STATUS_SUCCESS;
986	}
987	#endif
988
989
990	/**
991	* Worker for nemR3NativeInit that detect I/O control function numbers for VID.
992	*
993	* We use the function numbers directly in ring-0 and to name functions when
994	* logging NtDeviceIoControlFile calls.
995	*
996	* @note We could alternatively do this by disassembling the respective
997	* functions, but hooking NtDeviceIoControlFile and making fake calls
998	* more easily provides the desired information.
999	*
1000	* @returns VBox status code.
1001	* @param pVM The cross context VM structure. Will set I/O
1002	* control info members.
1003	* @param pErrInfo Where to always return error info.
1004	*/
1005	static int nemR3WinInitDiscoverIoControlProperties(PVM pVM, PRTERRINFO pErrInfo)
1006	{
1007	RT_NOREF(pVM, pErrInfo);
1008
1009	/*
1010	* Probe the I/O control information for select VID APIs so we can use
1011	* them directly from ring-0 and better log them.
1012	*
1013	*/
1014	#if defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) \|\| defined(LOG_ENABLED)
1015	decltype(NtDeviceIoControlFile) * const pfnOrg = *g_ppfnVidNtDeviceIoControlFile;
1016
1017	/* VidGetHvPartitionId - must work due to our memory management. */
1018	HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID;
1019	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_GetHvPartitionId;
1020	BOOL fRet = g_pfnVidGetHvPartitionId(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &idHvPartition);
1021	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1022	AssertReturn(fRet && idHvPartition == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID && g_IoCtlGetHvPartitionId.uFunction != 0,
1023	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
1024	"Problem figuring out VidGetHvPartitionId: fRet=%u idHvPartition=%#x dwErr=%u",
1025	fRet, idHvPartition, GetLastError()) );
1026	LogRel(("NEM: VidGetHvPartitionId -> fun:%#x in:%#x out:%#x\n",
1027	g_IoCtlGetHvPartitionId.uFunction, g_IoCtlGetHvPartitionId.cbInput, g_IoCtlGetHvPartitionId.cbOutput));
1028
1029	/* VidGetPartitionProperty - must work as it's fallback for VidGetHvPartitionId. */
1030	HV_PARTITION_PROPERTY uPropValue = ~NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE;
1031	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_GetPartitionProperty;
1032	fRet = g_pfnVidGetPartitionProperty(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE,
1033	&uPropValue);
1034	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1035	AssertReturn( fRet
1036	&& uPropValue == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE
1037	&& g_IoCtlGetHvPartitionId.uFunction != 0,
1038	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
1039	"Problem figuring out VidGetPartitionProperty: fRet=%u uPropValue=%#x dwErr=%u",
1040	fRet, uPropValue, GetLastError()) );
1041	LogRel(("NEM: VidGetPartitionProperty -> fun:%#x in:%#x out:%#x\n",
1042	g_IoCtlGetPartitionProperty.uFunction, g_IoCtlGetPartitionProperty.cbInput, g_IoCtlGetPartitionProperty.cbOutput));
1043
1044	#endif
1045	int rcRet = VINF_SUCCESS;
1046	#if defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(LOG_ENABLED)
1047
1048	/* VidStartVirtualProcessor */
1049	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StartVirtualProcessor;
1050	fRet = g_pfnVidStartVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1051	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1052	AssertStmt(fRet && g_IoCtlStartVirtualProcessor.uFunction != 0,
1053	rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1054	"Problem figuring out VidStartVirtualProcessor: fRet=%u dwErr=%u",
1055	fRet, GetLastError()) );
1056	LogRel(("NEM: VidStartVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStartVirtualProcessor.uFunction,
1057	g_IoCtlStartVirtualProcessor.cbInput, g_IoCtlStartVirtualProcessor.cbOutput));
1058
1059	/* VidStopVirtualProcessor */
1060	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StopVirtualProcessor;
1061	fRet = g_pfnVidStopVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1062	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1063	AssertStmt(fRet && g_IoCtlStopVirtualProcessor.uFunction != 0,
1064	rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1065	"Problem figuring out VidStopVirtualProcessor: fRet=%u dwErr=%u",
1066	fRet, GetLastError()) );
1067	LogRel(("NEM: VidStopVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStopVirtualProcessor.uFunction,
1068	g_IoCtlStopVirtualProcessor.cbInput, g_IoCtlStopVirtualProcessor.cbOutput));
1069
1070	/* VidMessageSlotHandleAndGetNext */
1071	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_MessageSlotHandleAndGetNext;
1072	fRet = g_pfnVidMessageSlotHandleAndGetNext(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE,
1073	NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, VID_MSHAGN_F_HANDLE_MESSAGE,
1074	NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT);
1075	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1076	AssertStmt(fRet && g_IoCtlMessageSlotHandleAndGetNext.uFunction != 0,
1077	rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1078	"Problem figuring out VidMessageSlotHandleAndGetNext: fRet=%u dwErr=%u",
1079	fRet, GetLastError()) );
1080	LogRel(("NEM: VidMessageSlotHandleAndGetNext -> fun:%#x in:%#x out:%#x\n",
1081	g_IoCtlMessageSlotHandleAndGetNext.uFunction, g_IoCtlMessageSlotHandleAndGetNext.cbInput,
1082	g_IoCtlMessageSlotHandleAndGetNext.cbOutput));
1083
1084	#endif /* defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(LOG_ENABLED) */
1085	#ifdef LOG_ENABLED
1086	/* The following are only for logging: */
1087	union
1088	{
1089	VID_MAPPED_MESSAGE_SLOT MapSlot;
1090	HV_REGISTER_NAME Name;
1091	HV_REGISTER_VALUE Value;
1092	} uBuf;
1093
1094	/* VidMessageSlotMap */
1095	g_pIoCtlDetectForLogging = &g_IoCtlMessageSlotMap;
1096	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1097	fRet = g_pfnVidMessageSlotMap(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &uBuf.MapSlot, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1098	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1099	Assert(fRet);
1100	LogRel(("NEM: VidMessageSlotMap -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1101	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1102
1103	/* VidGetVirtualProcessorState */
1104	uBuf.Name = HvRegisterExplicitSuspend;
1105	g_pIoCtlDetectForLogging = &g_IoCtlGetVirtualProcessorState;
1106	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1107	fRet = g_pfnVidGetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
1108	&uBuf.Name, 1, &uBuf.Value);
1109	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1110	Assert(fRet);
1111	LogRel(("NEM: VidGetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1112	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1113
1114	/* VidSetVirtualProcessorState */
1115	uBuf.Name = HvRegisterExplicitSuspend;
1116	g_pIoCtlDetectForLogging = &g_IoCtlSetVirtualProcessorState;
1117	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1118	fRet = g_pfnVidSetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
1119	&uBuf.Name, 1, &uBuf.Value);
1120	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1121	Assert(fRet);
1122	LogRel(("NEM: VidSetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1123	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1124
1125	g_pIoCtlDetectForLogging = NULL;
1126	#endif
1127
1128	/* Done. */
1129	#ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
1130	pVM->nem.s.IoCtlGetHvPartitionId = g_IoCtlGetHvPartitionId;
1131	pVM->nem.s.IoCtlGetPartitionProperty = g_IoCtlGetPartitionProperty;
1132	#endif
1133	#ifdef NEM_WIN_WITH_RING0_RUNLOOP
1134	pVM->nem.s.IoCtlStartVirtualProcessor = g_IoCtlStartVirtualProcessor;
1135	pVM->nem.s.IoCtlStopVirtualProcessor = g_IoCtlStopVirtualProcessor;
1136	pVM->nem.s.IoCtlMessageSlotHandleAndGetNext = g_IoCtlMessageSlotHandleAndGetNext;
1137	#endif
1138	return rcRet;
1139	}
1140
1141
1142	/**
1143	* Creates and sets up a Hyper-V (exo) partition.
1144	*
1145	* @returns VBox status code.
1146	* @param pVM The cross context VM structure.
1147	* @param pErrInfo Where to always return error info.
1148	*/
1149	static int nemR3WinInitCreatePartition(PVM pVM, PRTERRINFO pErrInfo)
1150	{
1151	AssertReturn(!pVM->nem.s.hPartition, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order"));
1152	AssertReturn(!pVM->nem.s.hPartitionDevice, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order"));
1153
1154	/*
1155	* Create the partition.
1156	*/
1157	WHV_PARTITION_HANDLE hPartition;
1158	HRESULT hrc = WHvCreatePartition(&hPartition);
1159	if (FAILED(hrc))
1160	return RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED, "WHvCreatePartition failed with %Rhrc (Last=%#x/%u)",
1161	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1162
1163	int rc;
1164
1165	/*
1166	* Set partition properties, most importantly the CPU count.
1167	*/
1168	/**
1169	* @todo Someone at Microsoft please explain another weird API:
1170	* - Why this API doesn't take the WHV_PARTITION_PROPERTY_CODE value as an
1171	* argument rather than as part of the struct. That is so weird if you've
1172	* used any other NT or windows API, including WHvGetCapability().
1173	* - Why use PVOID when WHV_PARTITION_PROPERTY is what's expected. We
1174	* technically only need 9 bytes for setting/getting
1175	* WHVPartitionPropertyCodeProcessorClFlushSize, but the API insists on 16. */
1176	WHV_PARTITION_PROPERTY Property;
1177	RT_ZERO(Property);
1178	Property.ProcessorCount = pVM->cCpus;
1179	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorCount, &Property, sizeof(Property));
1180	if (SUCCEEDED(hrc))
1181	{
1182	RT_ZERO(Property);
1183	Property.ExtendedVmExits.X64CpuidExit = pVM->nem.s.fExtendedCpuIdExit; /** @todo Register fixed results and restrict cpuid exits */
1184	Property.ExtendedVmExits.X64MsrExit = pVM->nem.s.fExtendedMsrExit;
1185	Property.ExtendedVmExits.ExceptionExit = pVM->nem.s.fExtendedXcptExit;
1186	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExtendedVmExits, &Property, sizeof(Property));
1187	if (SUCCEEDED(hrc))
1188	{
1189	/*
1190	* We'll continue setup in nemR3NativeInitAfterCPUM.
1191	*/
1192	pVM->nem.s.fCreatedEmts = false;
1193	pVM->nem.s.hPartition = hPartition;
1194	LogRel(("NEM: Created partition %p.\n", hPartition));
1195	return VINF_SUCCESS;
1196	}
1197
1198	rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED,
1199	"Failed setting WHvPartitionPropertyCodeExtendedVmExits to %'#RX64: %Rhrc",
1200	Property.ExtendedVmExits.AsUINT64, hrc);
1201	}
1202	else
1203	rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED,
1204	"Failed setting WHvPartitionPropertyCodeProcessorCount to %u: %Rhrc (Last=%#x/%u)",
1205	pVM->cCpus, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1206	WHvDeletePartition(hPartition);
1207
1208	Assert(!pVM->nem.s.hPartitionDevice);
1209	Assert(!pVM->nem.s.hPartition);
1210	return rc;
1211	}
1212
1213
1214	/**
1215	* Makes sure APIC and firmware will not allow X2APIC mode.
1216	*
1217	* This is rather ugly.
1218	*
1219	* @returns VBox status code
1220	* @param pVM The cross context VM structure.
1221	*/
1222	static int nemR3WinDisableX2Apic(PVM pVM)
1223	{
1224	/*
1225	* First make sure the 'Mode' config value of the APIC isn't set to X2APIC.
1226	* This defaults to APIC, so no need to change unless it's X2APIC.
1227	*/
1228	PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/apic/0/Config");
1229	if (pCfg)
1230	{
1231	uint8_t bMode = 0;
1232	int rc = CFGMR3QueryU8(pCfg, "Mode", &bMode);
1233	AssertLogRelMsgReturn(RT_SUCCESS(rc) \|\| rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc);
1234	if (RT_SUCCESS(rc) && bMode == PDMAPICMODE_X2APIC)
1235	{
1236	LogRel(("NEM: Adjusting APIC configuration from X2APIC to APIC max mode. X2APIC is not supported by the WinHvPlatform API!\n"));
1237	LogRel(("NEM: Disable Hyper-V if you need X2APIC for your guests!\n"));
1238	rc = CFGMR3RemoveValue(pCfg, "Mode");
1239	rc = CFGMR3InsertInteger(pCfg, "Mode", PDMAPICMODE_APIC);
1240	AssertLogRelRCReturn(rc, rc);
1241	}
1242	}
1243
1244	/*
1245	* Now the firmwares.
1246	* These also defaults to APIC and only needs adjusting if configured to X2APIC (2).
1247	*/
1248	static const char * const s_apszFirmwareConfigs[] =
1249	{
1250	"/Devices/efi/0/Config",
1251	"/Devices/pcbios/0/Config",
1252	};
1253	for (unsigned i = 0; i < RT_ELEMENTS(s_apszFirmwareConfigs); i++)
1254	{
1255	pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/APIC/0/Config");
1256	if (pCfg)
1257	{
1258	uint8_t bMode = 0;
1259	int rc = CFGMR3QueryU8(pCfg, "APIC", &bMode);
1260	AssertLogRelMsgReturn(RT_SUCCESS(rc) \|\| rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc);
1261	if (RT_SUCCESS(rc) && bMode == 2)
1262	{
1263	LogRel(("NEM: Adjusting %s/Mode from 2 (X2APIC) to 1 (APIC).\n", s_apszFirmwareConfigs[i]));
1264	rc = CFGMR3RemoveValue(pCfg, "APIC");
1265	rc = CFGMR3InsertInteger(pCfg, "APIC", 1);
1266	AssertLogRelRCReturn(rc, rc);
1267	}
1268	}
1269	}
1270
1271	return VINF_SUCCESS;
1272	}
1273
1274
1275	/**
1276	* Try initialize the native API.
1277	*
1278	* This may only do part of the job, more can be done in
1279	* nemR3NativeInitAfterCPUM() and nemR3NativeInitCompleted().
1280	*
1281	* @returns VBox status code.
1282	* @param pVM The cross context VM structure.
1283	* @param fFallback Whether we're in fallback mode or use-NEM mode. In
1284	* the latter we'll fail if we cannot initialize.
1285	* @param fForced Whether the HMForced flag is set and we should
1286	* fail if we cannot initialize.
1287	*/
1288	int nemR3NativeInit(PVM pVM, bool fFallback, bool fForced)
1289	{
1290	g_uBuildNo = RTSystemGetNtBuildNo();
1291
1292	/*
1293	* Some state init.
1294	*/
1295	#ifdef NEM_WIN_WITH_A20
1296	pVM->nem.s.fA20Enabled = true;
1297	#endif
1298	#if 0
1299	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1300	{
1301	PNEMCPU pNemCpu = &pVM->apCpusR3[idCpu]->nem.s;
1302	}
1303	#endif
1304
1305	#ifndef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
1306	/** Some guess working here. */
1307	pVM->nem.s.cMaxMappedPages = 4000;
1308	if (g_uBuildNo >= 22000)
1309	pVM->nem.s.cMaxMappedPages = _64K; /* seems it can do lots more even */
1310	#endif
1311
1312	/*
1313	* Error state.
1314	* The error message will be non-empty on failure and 'rc' will be set too.
1315	*/
1316	RTERRINFOSTATIC ErrInfo;
1317	PRTERRINFO pErrInfo = RTErrInfoInitStatic(&ErrInfo);
1318	int rc = nemR3WinInitProbeAndLoad(fForced, pErrInfo);
1319	if (RT_SUCCESS(rc))
1320	{
1321	/*
1322	* Check the capabilties of the hypervisor, starting with whether it's present.
1323	*/
1324	rc = nemR3WinInitCheckCapabilities(pVM, pErrInfo);
1325	if (RT_SUCCESS(rc))
1326	{
1327	/*
1328	* Discover the VID I/O control function numbers we need.
1329	*/
1330	rc = nemR3WinInitDiscoverIoControlProperties(pVM, pErrInfo);
1331	if (rc == VERR_NEM_RING3_ONLY)
1332	{
1333	if (pVM->nem.s.fUseRing0Runloop)
1334	{
1335	LogRel(("NEM: Disabling UseRing0Runloop.\n"));
1336	pVM->nem.s.fUseRing0Runloop = false;
1337	}
1338	rc = VINF_SUCCESS;
1339	}
1340	if (RT_SUCCESS(rc))
1341	{
1342	/*
1343	* Check out our ring-0 capabilities.
1344	*/
1345	rc = SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), 0 /idCpu/, VMMR0_DO_NEM_INIT_VM, 0, NULL);
1346	if (RT_SUCCESS(rc))
1347	{
1348	/*
1349	* Create and initialize a partition.
1350	*/
1351	rc = nemR3WinInitCreatePartition(pVM, pErrInfo);
1352	if (RT_SUCCESS(rc))
1353	{
1354	/*
1355	* Set ourselves as the execution engine and make config adjustments.
1356	*/
1357	VM_SET_MAIN_EXECUTION_ENGINE(pVM, VM_EXEC_ENGINE_NATIVE_API);
1358	Log(("NEM: Marked active!\n"));
1359	nemR3WinDisableX2Apic(pVM);
1360	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
1361	PGMR3EnableNemMode(pVM);
1362	#endif
1363
1364	/*
1365	* Register release statistics
1366	*/
1367	STAMR3Register(pVM, (void *)&pVM->nem.s.cMappedPages, STAMTYPE_U32, STAMVISIBILITY_ALWAYS,
1368	"/NEM/PagesCurrentlyMapped", STAMUNIT_PAGES, "Number guest pages currently mapped by the VM");
1369	STAMR3Register(pVM, (void *)&pVM->nem.s.StatMapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1370	"/NEM/PagesMapCalls", STAMUNIT_PAGES, "Calls to WHvMapGpaRange/HvCallMapGpaPages");
1371	STAMR3Register(pVM, (void *)&pVM->nem.s.StatMapPageFailed, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1372	"/NEM/PagesMapFails", STAMUNIT_PAGES, "Calls to WHvMapGpaRange/HvCallMapGpaPages that failed");
1373	STAMR3Register(pVM, (void *)&pVM->nem.s.StatUnmapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1374	"/NEM/PagesUnmapCalls", STAMUNIT_PAGES, "Calls to WHvUnmapGpaRange/HvCallUnmapGpaPages");
1375	STAMR3Register(pVM, (void *)&pVM->nem.s.StatUnmapPageFailed, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1376	"/NEM/PagesUnmapFails", STAMUNIT_PAGES, "Calls to WHvUnmapGpaRange/HvCallUnmapGpaPages that failed");
1377	#ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
1378	STAMR3Register(pVM, (void *)&pVM->nem.s.StatRemapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1379	"/NEM/PagesRemapCalls", STAMUNIT_PAGES, "Calls to HvCallMapGpaPages for changing page protection");
1380	STAMR3Register(pVM, (void *)&pVM->nem.s.StatRemapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1381	"/NEM/PagesRemapFails", STAMUNIT_PAGES, "Calls to HvCallMapGpaPages for changing page protection failed");
1382	#elif !defined(VBOX_WITH_PGM_NEM_MODE)
1383	STAMR3Register(pVM, (void *)&pVM->nem.s.StatUnmapAllPages, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1384	"/NEM/PagesUnmapAll", STAMUNIT_PAGES, "Times we had to unmap all the pages");
1385	#endif
1386	#ifdef VBOX_WITH_PGM_NEM_MODE
1387	STAMR3Register(pVM, &pVM->nem.s.StatProfMapGpaRange, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1388	"/NEM/PagesMapGpaRange", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvMapGpaRange for bigger stuff");
1389	STAMR3Register(pVM, &pVM->nem.s.StatProfUnmapGpaRange, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1390	"/NEM/PagesUnmapGpaRange", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvUnmapGpaRange for bigger stuff");
1391	# endif
1392	# ifndef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
1393	STAMR3Register(pVM, &pVM->nem.s.StatProfMapGpaRangePage, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1394	"/NEM/PagesMapGpaRangePage", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvMapGpaRange for single pages");
1395	STAMR3Register(pVM, &pVM->nem.s.StatProfUnmapGpaRangePage, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1396	"/NEM/PagesUnmapGpaRangePage", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvUnmapGpaRange for single pages");
1397	# endif
1398
1399	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1400	{
1401	PNEMCPU pNemCpu = &pVM->apCpusR3[idCpu]->nem.s;
1402	STAMR3RegisterF(pVM, &pNemCpu->StatExitPortIo, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of port I/O exits", "/NEM/CPU%u/ExitPortIo", idCpu);
1403	STAMR3RegisterF(pVM, &pNemCpu->StatExitMemUnmapped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unmapped memory exits", "/NEM/CPU%u/ExitMemUnmapped", idCpu);
1404	STAMR3RegisterF(pVM, &pNemCpu->StatExitMemIntercept, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of intercepted memory exits", "/NEM/CPU%u/ExitMemIntercept", idCpu);
1405	STAMR3RegisterF(pVM, &pNemCpu->StatExitHalt, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of HLT exits", "/NEM/CPU%u/ExitHalt", idCpu);
1406	STAMR3RegisterF(pVM, &pNemCpu->StatExitInterruptWindow, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of interrupt window exits", "/NEM/CPU%u/ExitInterruptWindow", idCpu);
1407	STAMR3RegisterF(pVM, &pNemCpu->StatExitCpuId, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of CPUID exits", "/NEM/CPU%u/ExitCpuId", idCpu);
1408	STAMR3RegisterF(pVM, &pNemCpu->StatExitMsr, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of MSR access exits", "/NEM/CPU%u/ExitMsr", idCpu);
1409	STAMR3RegisterF(pVM, &pNemCpu->StatExitException, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of exception exits", "/NEM/CPU%u/ExitException", idCpu);
1410	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionBp, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #BP exits", "/NEM/CPU%u/ExitExceptionBp", idCpu);
1411	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionDb, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #DB exits", "/NEM/CPU%u/ExitExceptionDb", idCpu);
1412	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionGp, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #GP exits", "/NEM/CPU%u/ExitExceptionGp", idCpu);
1413	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionGpMesa, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #GP exits from mesa driver", "/NEM/CPU%u/ExitExceptionGpMesa", idCpu);
1414	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #UD exits", "/NEM/CPU%u/ExitExceptionUd", idCpu);
1415	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUdHandled, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of handled #UD exits", "/NEM/CPU%u/ExitExceptionUdHandled", idCpu);
1416	STAMR3RegisterF(pVM, &pNemCpu->StatExitUnrecoverable, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unrecoverable exits", "/NEM/CPU%u/ExitUnrecoverable", idCpu);
1417	STAMR3RegisterF(pVM, &pNemCpu->StatGetMsgTimeout, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of get message timeouts/alerts", "/NEM/CPU%u/GetMsgTimeout", idCpu);
1418	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuSuccess, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of successful CPU stops", "/NEM/CPU%u/StopCpuSuccess", idCpu);
1419	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPending, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stops", "/NEM/CPU%u/StopCpuPending", idCpu);
1420	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingAlerts,STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stop alerts", "/NEM/CPU%u/StopCpuPendingAlerts", idCpu);
1421	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingOdd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of odd pending CPU stops (see code)", "/NEM/CPU%u/StopCpuPendingOdd", idCpu);
1422	STAMR3RegisterF(pVM, &pNemCpu->StatCancelChangedState, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel changed state", "/NEM/CPU%u/CancelChangedState", idCpu);
1423	STAMR3RegisterF(pVM, &pNemCpu->StatCancelAlertedThread, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel alerted EMT", "/NEM/CPU%u/CancelAlertedEMT", idCpu);
1424	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPre, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pre execution FF breaks", "/NEM/CPU%u/BreakOnFFPre", idCpu);
1425	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPost, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of post execution FF breaks", "/NEM/CPU%u/BreakOnFFPost", idCpu);
1426	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnCancel, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel execution breaks", "/NEM/CPU%u/BreakOnCancel", idCpu);
1427	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnStatus, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of status code breaks", "/NEM/CPU%u/BreakOnStatus", idCpu);
1428	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnDemand, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of on-demand state imports", "/NEM/CPU%u/ImportOnDemand", idCpu);
1429	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturn, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of state imports on loop return", "/NEM/CPU%u/ImportOnReturn", idCpu);
1430	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturnSkipped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of skipped state imports on loop return", "/NEM/CPU%u/ImportOnReturnSkipped", idCpu);
1431	STAMR3RegisterF(pVM, &pNemCpu->StatQueryCpuTick, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of TSC queries", "/NEM/CPU%u/QueryCpuTick", idCpu);
1432	}
1433
1434	PUVM pUVM = pVM->pUVM;
1435	STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesAvailable, STAMTYPE_U64, STAMVISIBILITY_ALWAYS,
1436	STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Free pages available to the hypervisor",
1437	"/NEM/R0Stats/cPagesAvailable");
1438	STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesInUse, STAMTYPE_U64, STAMVISIBILITY_ALWAYS,
1439	STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Pages in use by hypervisor",
1440	"/NEM/R0Stats/cPagesInUse");
1441
1442	}
1443	}
1444	else
1445	rc = RTErrInfoSetF(pErrInfo, rc, "VMMR0_DO_NEM_INIT_VM failed: %Rrc", rc);
1446	}
1447	}
1448	}
1449
1450	/*
1451	* We only fail if in forced mode, otherwise just log the complaint and return.
1452	*/
1453	Assert(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API \|\| RTErrInfoIsSet(pErrInfo));
1454	if ( (fForced \|\| !fFallback)
1455	&& pVM->bMainExecutionEngine != VM_EXEC_ENGINE_NATIVE_API)
1456	return VMSetError(pVM, RT_SUCCESS_NP(rc) ? VERR_NEM_NOT_AVAILABLE : rc, RT_SRC_POS, "%s", pErrInfo->pszMsg);
1457
1458	if (RTErrInfoIsSet(pErrInfo))
1459	LogRel(("NEM: Not available: %s\n", pErrInfo->pszMsg));
1460	return VINF_SUCCESS;
1461	}
1462
1463
1464	/**
1465	* This is called after CPUMR3Init is done.
1466	*
1467	* @returns VBox status code.
1468	* @param pVM The VM handle..
1469	*/
1470	int nemR3NativeInitAfterCPUM(PVM pVM)
1471	{
1472	/*
1473	* Validate sanity.
1474	*/
1475	WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition;
1476	AssertReturn(hPartition != NULL, VERR_WRONG_ORDER);
1477	AssertReturn(!pVM->nem.s.hPartitionDevice, VERR_WRONG_ORDER);
1478	AssertReturn(!pVM->nem.s.fCreatedEmts, VERR_WRONG_ORDER);
1479	AssertReturn(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API, VERR_WRONG_ORDER);
1480
1481	/*
1482	* Continue setting up the partition now that we've got most of the CPUID feature stuff.
1483	*/
1484	WHV_PARTITION_PROPERTY Property;
1485	HRESULT hrc;
1486
1487	#if 0
1488	/* Not sure if we really need to set the vendor.
1489	Update: Apparently we don't. WHvPartitionPropertyCodeProcessorVendor was removed in 17110. */
1490	RT_ZERO(Property);
1491	Property.ProcessorVendor = pVM->nem.s.enmCpuVendor == CPUMCPUVENDOR_AMD ? WHvProcessorVendorAmd
1492	: WHvProcessorVendorIntel;
1493	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorVendor, &Property, sizeof(Property));
1494	if (FAILED(hrc))
1495	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1496	"Failed to set WHvPartitionPropertyCodeProcessorVendor to %u: %Rhrc (Last=%#x/%u)",
1497	Property.ProcessorVendor, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1498	#endif
1499
1500	/* Not sure if we really need to set the cache line flush size. */
1501	RT_ZERO(Property);
1502	Property.ProcessorClFlushSize = pVM->nem.s.cCacheLineFlushShift;
1503	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorClFlushSize, &Property, sizeof(Property));
1504	if (FAILED(hrc))
1505	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1506	"Failed to set WHvPartitionPropertyCodeProcessorClFlushSize to %u: %Rhrc (Last=%#x/%u)",
1507	pVM->nem.s.cCacheLineFlushShift, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1508
1509	/* Intercept #DB, #BP and #UD exceptions. */
1510	RT_ZERO(Property);
1511	Property.ExceptionExitBitmap = RT_BIT_64(WHvX64ExceptionTypeDebugTrapOrFault)
1512	\| RT_BIT_64(WHvX64ExceptionTypeBreakpointTrap)
1513	\| RT_BIT_64(WHvX64ExceptionTypeInvalidOpcodeFault);
1514
1515	/* Intercept #GP to workaround the buggy mesa vmwgfx driver. */
1516	PVMCPU pVCpu = pVM->apCpusR3[0]; /** @todo In theory per vCPU, in practice same for all. */
1517	if (pVCpu->nem.s.fTrapXcptGpForLovelyMesaDrv)
1518	Property.ExceptionExitBitmap \|= RT_BIT_64(WHvX64ExceptionTypeGeneralProtectionFault);
1519
1520	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExceptionExitBitmap, &Property, sizeof(Property));
1521	if (FAILED(hrc))
1522	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1523	"Failed to set WHvPartitionPropertyCodeExceptionExitBitmap to %#RX64: %Rhrc (Last=%#x/%u)",
1524	Property.ExceptionExitBitmap, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1525
1526
1527	/*
1528	* Sync CPU features with CPUM.
1529	*/
1530	/** @todo sync CPU features with CPUM. */
1531
1532	/* Set the partition property. */
1533	RT_ZERO(Property);
1534	Property.ProcessorFeatures.AsUINT64 = pVM->nem.s.uCpuFeatures.u64;
1535	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorFeatures, &Property, sizeof(Property));
1536	if (FAILED(hrc))
1537	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1538	"Failed to set WHvPartitionPropertyCodeProcessorFeatures to %'#RX64: %Rhrc (Last=%#x/%u)",
1539	pVM->nem.s.uCpuFeatures.u64, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1540
1541	/*
1542	* Set up the partition.
1543	*
1544	* Seems like this is where the partition is actually instantiated and we get
1545	* a handle to it.
1546	*/
1547	hrc = WHvSetupPartition(hPartition);
1548	if (FAILED(hrc))
1549	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1550	"Call to WHvSetupPartition failed: %Rhrc (Last=%#x/%u)",
1551	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1552
1553	/* Get the handle (could also fish this out via VID.DLL NtDeviceIoControlFile intercepting). */
1554	HANDLE hPartitionDevice;
1555	__try
1556	{
1557	hPartitionDevice = ((HANDLE *)hPartition)[1];
1558	}
1559	__except(EXCEPTION_EXECUTE_HANDLER)
1560	{
1561	hrc = GetExceptionCode();
1562	hPartitionDevice = NULL;
1563	}
1564	if ( hPartitionDevice == NULL
1565	\|\| hPartitionDevice == (HANDLE)(intptr_t)-1)
1566	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1567	"Failed to get device handle for partition %p: %Rhrc", hPartition, hrc);
1568
1569	/* Test the handle. */
1570	HV_PARTITION_PROPERTY uValue;
1571	if (!g_pfnVidGetPartitionProperty(hPartitionDevice, HvPartitionPropertyProcessorVendor, &uValue))
1572	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1573	"Failed to get device handle and/or partition ID for %p (hPartitionDevice=%p, Last=%#x/%u)",
1574	hPartition, hPartitionDevice, RTNtLastStatusValue(), RTNtLastErrorValue());
1575	LogRel(("NEM: HvPartitionPropertyProcessorVendor=%#llx (%lld)\n", uValue, uValue));
1576
1577	/*
1578	* Get the partition ID so we can keep managing our memory the way we've
1579	* been doing for the last 12+ years.
1580	*
1581	* The WHvMapGpaRange/WHvUnmapGpaRange interface is very ill-fitting and
1582	* very inflexible compared to what we need. Fortunately, the hypervisor
1583	* have a much better interface which we are able to use from ring-0.
1584	* Not pretty, but necessary for the time being.
1585	*/
1586	HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID;
1587	if (!g_pfnVidGetHvPartitionId(hPartitionDevice, &idHvPartition))
1588	{
1589	if (RTNtLastErrorValue() != ERROR_INVALID_FUNCTION) /* Will try get it later in VMMR0_DO_NEM_INIT_VM_PART_2. */
1590	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1591	"Failed to get device handle and/or partition ID for %p (hPartitionDevice=%p, Last=%#x/%u)",
1592	hPartition, hPartitionDevice, RTNtLastStatusValue(), RTNtLastErrorValue());
1593	LogRel(("NEM: VidGetHvPartitionId failed with ERROR_NOT_SUPPORTED, will try again later from ring-0...\n"));
1594	idHvPartition = HV_PARTITION_ID_INVALID;
1595	}
1596	pVM->nem.s.hPartitionDevice = hPartitionDevice;
1597	pVM->nem.s.idHvPartition = idHvPartition;
1598
1599	/*
1600	* Setup the EMTs.
1601	*/
1602	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1603	{
1604	pVCpu = pVM->apCpusR3[idCpu];
1605
1606	pVCpu->nem.s.hNativeThreadHandle = (RTR3PTR)RTThreadGetNativeHandle(VMR3GetThreadHandle(pVCpu->pUVCpu));
1607	Assert((HANDLE)pVCpu->nem.s.hNativeThreadHandle != INVALID_HANDLE_VALUE);
1608
1609	#ifndef NEM_WIN_USE_OUR_OWN_RUN_API
1610	# ifdef NEM_WIN_WITH_RING0_RUNLOOP
1611	if (!pVM->nem.s.fUseRing0Runloop)
1612	# endif
1613	{
1614	hrc = WHvCreateVirtualProcessor(hPartition, idCpu, 0 /fFlags/);
1615	if (FAILED(hrc))
1616	{
1617	NTSTATUS const rcNtLast = RTNtLastStatusValue();
1618	DWORD const dwErrLast = RTNtLastErrorValue();
1619	while (idCpu-- > 0)
1620	{
1621	HRESULT hrc2 = WHvDeleteVirtualProcessor(hPartition, idCpu);
1622	AssertLogRelMsg(SUCCEEDED(hrc2), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n",
1623	hPartition, idCpu, hrc2, RTNtLastStatusValue(),
1624	RTNtLastErrorValue()));
1625	}
1626	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1627	"Call to WHvCreateVirtualProcessor failed: %Rhrc (Last=%#x/%u)", hrc, rcNtLast, dwErrLast);
1628	}
1629	}
1630	# ifdef NEM_WIN_WITH_RING0_RUNLOOP
1631	else
1632	# endif
1633	#endif /* !NEM_WIN_USE_OUR_OWN_RUN_API */
1634	#if defined(NEM_WIN_WITH_RING0_RUNLOOP) \|\| defined(NEM_WIN_USE_OUR_OWN_RUN_API)
1635	{
1636	VID_MAPPED_MESSAGE_SLOT MappedMsgSlot = { NULL, UINT32_MAX, UINT32_MAX };
1637	if (g_pfnVidMessageSlotMap(hPartitionDevice, &MappedMsgSlot, idCpu))
1638	{
1639	AssertLogRelMsg(MappedMsgSlot.iCpu == idCpu && MappedMsgSlot.uParentAdvisory == UINT32_MAX,
1640	("%#x %#x (iCpu=%#x)\n", MappedMsgSlot.iCpu, MappedMsgSlot.uParentAdvisory, idCpu));
1641	pVCpu->nem.s.pvMsgSlotMapping = MappedMsgSlot.pMsgBlock;
1642	}
1643	else
1644	{
1645	NTSTATUS const rcNtLast = RTNtLastStatusValue();
1646	DWORD const dwErrLast = RTNtLastErrorValue();
1647	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1648	"Call to VidMessageSlotMap failed: Last=%#x/%u", rcNtLast, dwErrLast);
1649	}
1650	}
1651	#endif
1652	}
1653	pVM->nem.s.fCreatedEmts = true;
1654
1655	/*
1656	* Do some more ring-0 initialization now that we've got the partition handle.
1657	*/
1658	int rc = VMMR3CallR0Emt(pVM, pVM->apCpusR3[0], VMMR0_DO_NEM_INIT_VM_PART_2, 0, NULL);
1659	if (RT_SUCCESS(rc))
1660	{
1661	LogRel(("NEM: Successfully set up partition (device handle %p, partition ID %#llx)\n",
1662	hPartitionDevice, pVM->nem.s.idHvPartition));
1663
1664	#if 1
1665	VMMR3CallR0Emt(pVM, pVM->apCpusR3[0], VMMR0_DO_NEM_UPDATE_STATISTICS, 0, NULL);
1666	LogRel(("NEM: Memory balance: %#RX64 out of %#RX64 pages in use\n",
1667	pVM->nem.s.R0Stats.cPagesInUse, pVM->nem.s.R0Stats.cPagesAvailable));
1668	#endif
1669
1670	/*
1671	* Register statistics on shared pages.
1672	*/
1673	/** @todo HvCallMapStatsPage */
1674
1675	/*
1676	* Adjust features.
1677	* Note! We've already disabled X2APIC via CFGM during the first init call.
1678	*/
1679
1680	#if 0 && defined(DEBUG_bird)
1681	/*
1682	* Poke and probe a little.
1683	*/
1684	PVMCPU pVCpu = pVM->apCpusR3[0];
1685	uint32_t aRegNames[1024];
1686	HV_REGISTER_VALUE aRegValues[1024];
1687	uint32_t aPropCodes[128];
1688	uint64_t aPropValues[128];
1689	for (int iOuter = 0; iOuter < 5; iOuter++)
1690	{
1691	LogRel(("\niOuter %d\n", iOuter));
1692	# if 1
1693	/* registers */
1694	uint32_t iRegValue = 0;
1695	uint32_t cRegChanges = 0;
1696	for (uint32_t iReg = 0; iReg < 0x001101ff; iReg++)
1697	{
1698	if (iOuter != 0 && aRegNames[iRegValue] > iReg)
1699	continue;
1700	RT_ZERO(pVCpu->nem.s.Hypercall.Experiment);
1701	pVCpu->nem.s.Hypercall.Experiment.uItem = iReg;
1702	int rc2 = VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 0, NULL);
1703	AssertLogRelRCBreak(rc2);
1704	if (pVCpu->nem.s.Hypercall.Experiment.fSuccess)
1705	{
1706	LogRel(("Register %#010x = %#18RX64, %#18RX64\n", iReg,
1707	pVCpu->nem.s.Hypercall.Experiment.uLoValue, pVCpu->nem.s.Hypercall.Experiment.uHiValue));
1708	if (iReg == HvX64RegisterTsc)
1709	{
1710	uint64_t uTsc = ASMReadTSC();
1711	LogRel(("TSC = %#18RX64; Delta %#18RX64 or %#18RX64\n",
1712	uTsc, pVCpu->nem.s.Hypercall.Experiment.uLoValue - uTsc, uTsc - pVCpu->nem.s.Hypercall.Experiment.uLoValue));
1713	}
1714
1715	if (iOuter == 0)
1716	aRegNames[iRegValue] = iReg;
1717	else if( aRegValues[iRegValue].Reg128.Low64 != pVCpu->nem.s.Hypercall.Experiment.uLoValue
1718	\|\| aRegValues[iRegValue].Reg128.High64 != pVCpu->nem.s.Hypercall.Experiment.uHiValue)
1719	{
1720	LogRel(("Changed from %#18RX64, %#18RX64 !!\n",
1721	aRegValues[iRegValue].Reg128.Low64, aRegValues[iRegValue].Reg128.High64));
1722	LogRel(("Delta %#18RX64, %#18RX64 !!\n",
1723	pVCpu->nem.s.Hypercall.Experiment.uLoValue - aRegValues[iRegValue].Reg128.Low64,
1724	pVCpu->nem.s.Hypercall.Experiment.uHiValue - aRegValues[iRegValue].Reg128.High64));
1725	cRegChanges++;
1726	}
1727	aRegValues[iRegValue].Reg128.Low64 = pVCpu->nem.s.Hypercall.Experiment.uLoValue;
1728	aRegValues[iRegValue].Reg128.High64 = pVCpu->nem.s.Hypercall.Experiment.uHiValue;
1729	iRegValue++;
1730	AssertBreak(iRegValue < RT_ELEMENTS(aRegValues));
1731	}
1732	}
1733	LogRel(("Found %u registers, %u changed\n", iRegValue, cRegChanges));
1734	# endif
1735	# if 1
1736	/* partition properties */
1737	uint32_t iPropValue = 0;
1738	uint32_t cPropChanges = 0;
1739	for (uint32_t iProp = 0; iProp < 0xc11ff; iProp++)
1740	{
1741	if (iProp == HvPartitionPropertyDebugChannelId /* hangs host */)
1742	continue;
1743	if (iOuter != 0 && aPropCodes[iPropValue] > iProp)
1744	continue;
1745	RT_ZERO(pVCpu->nem.s.Hypercall.Experiment);
1746	pVCpu->nem.s.Hypercall.Experiment.uItem = iProp;
1747	int rc2 = VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 1, NULL);
1748	AssertLogRelRCBreak(rc2);
1749	if (pVCpu->nem.s.Hypercall.Experiment.fSuccess)
1750	{
1751	LogRel(("Property %#010x = %#18RX64\n", iProp, pVCpu->nem.s.Hypercall.Experiment.uLoValue));
1752	if (iOuter == 0)
1753	aPropCodes[iPropValue] = iProp;
1754	else if (aPropValues[iPropValue] != pVCpu->nem.s.Hypercall.Experiment.uLoValue)
1755	{
1756	LogRel(("Changed from %#18RX64, delta %#18RX64!!\n",
1757	aPropValues[iPropValue], pVCpu->nem.s.Hypercall.Experiment.uLoValue - aPropValues[iPropValue]));
1758	cRegChanges++;
1759	}
1760	aPropValues[iPropValue] = pVCpu->nem.s.Hypercall.Experiment.uLoValue;
1761	iPropValue++;
1762	AssertBreak(iPropValue < RT_ELEMENTS(aPropValues));
1763	}
1764	}
1765	LogRel(("Found %u properties, %u changed\n", iPropValue, cPropChanges));
1766	# endif
1767
1768	/* Modify the TSC register value and see what changes. */
1769	if (iOuter != 0)
1770	{
1771	RT_ZERO(pVCpu->nem.s.Hypercall.Experiment);
1772	pVCpu->nem.s.Hypercall.Experiment.uItem = HvX64RegisterTsc;
1773	pVCpu->nem.s.Hypercall.Experiment.uHiValue = UINT64_C(0x00000fffffffffff) >> iOuter;
1774	pVCpu->nem.s.Hypercall.Experiment.uLoValue = UINT64_C(0x0011100000000000) << iOuter;
1775	VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 2, NULL);
1776	LogRel(("Setting HvX64RegisterTsc -> %RTbool (%#RX64)\n", pVCpu->nem.s.Hypercall.Experiment.fSuccess, pVCpu->nem.s.Hypercall.Experiment.uStatus));
1777	}
1778
1779	RT_ZERO(pVCpu->nem.s.Hypercall.Experiment);
1780	pVCpu->nem.s.Hypercall.Experiment.uItem = HvX64RegisterTsc;
1781	VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 0, NULL);
1782	LogRel(("HvX64RegisterTsc = %#RX64, %#RX64\n", pVCpu->nem.s.Hypercall.Experiment.uLoValue, pVCpu->nem.s.Hypercall.Experiment.uHiValue));
1783	}
1784
1785	#endif
1786	return VINF_SUCCESS;
1787	}
1788	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Call to NEMR0InitVMPart2 failed: %Rrc", rc);
1789	}
1790
1791
1792	int nemR3NativeInitCompleted(PVM pVM, VMINITCOMPLETED enmWhat)
1793	{
1794	//BOOL fRet = SetThreadPriority(GetCurrentThread(), 0);
1795	//AssertLogRel(fRet);
1796
1797	NOREF(pVM); NOREF(enmWhat);
1798	return VINF_SUCCESS;
1799	}
1800
1801
1802	int nemR3NativeTerm(PVM pVM)
1803	{
1804	/*
1805	* Delete the partition.
1806	*/
1807	WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition;
1808	pVM->nem.s.hPartition = NULL;
1809	pVM->nem.s.hPartitionDevice = NULL;
1810	if (hPartition != NULL)
1811	{
1812	VMCPUID idCpu = pVM->nem.s.fCreatedEmts ? pVM->cCpus : 0;
1813	LogRel(("NEM: Destroying partition %p with its %u VCpus...\n", hPartition, idCpu));
1814	while (idCpu-- > 0)
1815	{
1816	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
1817	pVCpu->nem.s.pvMsgSlotMapping = NULL;
1818	#ifndef NEM_WIN_USE_OUR_OWN_RUN_API
1819	# ifdef NEM_WIN_WITH_RING0_RUNLOOP
1820	if (!pVM->nem.s.fUseRing0Runloop)
1821	# endif
1822	{
1823	HRESULT hrc = WHvDeleteVirtualProcessor(hPartition, idCpu);
1824	AssertLogRelMsg(SUCCEEDED(hrc), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n",
1825	hPartition, idCpu, hrc, RTNtLastStatusValue(),
1826	RTNtLastErrorValue()));
1827	}
1828	#endif
1829	}
1830	WHvDeletePartition(hPartition);
1831	}
1832	pVM->nem.s.fCreatedEmts = false;
1833	return VINF_SUCCESS;
1834	}
1835
1836
1837	/**
1838	* VM reset notification.
1839	*
1840	* @param pVM The cross context VM structure.
1841	*/
1842	void nemR3NativeReset(PVM pVM)
1843	{
1844	#if 0
1845	/* Unfix the A20 gate. */
1846	pVM->nem.s.fA20Fixed = false;
1847	#else
1848	RT_NOREF(pVM);
1849	#endif
1850	}
1851
1852
1853	/**
1854	* Reset CPU due to INIT IPI or hot (un)plugging.
1855	*
1856	* @param pVCpu The cross context virtual CPU structure of the CPU being
1857	* reset.
1858	* @param fInitIpi Whether this is the INIT IPI or hot (un)plugging case.
1859	*/
1860	void nemR3NativeResetCpu(PVMCPU pVCpu, bool fInitIpi)
1861	{
1862	#ifdef NEM_WIN_WITH_A20
1863	/* Lock the A20 gate if INIT IPI, make sure it's enabled. */
1864	if (fInitIpi && pVCpu->idCpu > 0)
1865	{
1866	PVM pVM = pVCpu->CTX_SUFF(pVM);
1867	if (!pVM->nem.s.fA20Enabled)
1868	nemR3NativeNotifySetA20(pVCpu, true);
1869	pVM->nem.s.fA20Enabled = true;
1870	pVM->nem.s.fA20Fixed = true;
1871	}
1872	#else
1873	RT_NOREF(pVCpu, fInitIpi);
1874	#endif
1875	}
1876
1877
1878	VBOXSTRICTRC nemR3NativeRunGC(PVM pVM, PVMCPU pVCpu)
1879	{
1880	#ifdef NEM_WIN_WITH_RING0_RUNLOOP
1881	if (pVM->nem.s.fUseRing0Runloop)
1882	{
1883	for (;;)
1884	{
1885	VBOXSTRICTRC rcStrict = VMMR3CallR0EmtFast(pVM, pVCpu, VMMR0_DO_NEM_RUN);
1886	if (RT_SUCCESS(rcStrict))
1887	{
1888	/*
1889	* We deal with VINF_NEM_FLUSH_TLB here, since we're running the risk of
1890	* getting these while we already got another RC (I/O ports).
1891	*/
1892	/* Status codes: */
1893	VBOXSTRICTRC rcPending = pVCpu->nem.s.rcPending;
1894	pVCpu->nem.s.rcPending = VINF_SUCCESS;
1895	if (rcStrict == VINF_NEM_FLUSH_TLB \|\| rcPending == VINF_NEM_FLUSH_TLB)
1896	{
1897	LogFlow(("nemR3NativeRunGC: calling PGMFlushTLB...\n"));
1898	int rc = PGMFlushTLB(pVCpu, CPUMGetGuestCR3(pVCpu), true /fGlobal/, false /fPdpesMapped/);
1899	AssertRCReturn(rc, rc);
1900	if (rcStrict == VINF_NEM_FLUSH_TLB)
1901	{
1902	if ( !VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_POST_MASK \| VM_FF_HP_R0_PRE_HM_MASK)
1903	&& !VMCPU_FF_IS_ANY_SET(pVCpu, (VMCPU_FF_HIGH_PRIORITY_POST_MASK \| VMCPU_FF_HP_R0_PRE_HM_MASK)
1904	& ~VMCPU_FF_RESUME_GUEST_MASK))
1905	{
1906	VMCPU_FF_CLEAR_MASK(pVCpu, VMCPU_FF_RESUME_GUEST_MASK);
1907	continue;
1908	}
1909	rcStrict = VINF_SUCCESS;
1910	}
1911	}
1912	else
1913	AssertMsg(rcPending == VINF_SUCCESS, ("rcPending=%Rrc\n", VBOXSTRICTRC_VAL(rcPending) ));
1914	}
1915	LogFlow(("nemR3NativeRunGC: returns %Rrc\n", VBOXSTRICTRC_VAL(rcStrict) ));
1916	return rcStrict;
1917	}
1918	}
1919	#endif
1920	return nemHCWinRunGC(pVM, pVCpu);
1921	}
1922
1923
1924	VMMR3_INT_DECL(bool) NEMR3CanExecuteGuest(PVM pVM, PVMCPU pVCpu)
1925	{
1926	Assert(VM_IS_NEM_ENABLED(pVM));
1927
1928	#ifndef NEM_WIN_WITH_A20
1929	/*
1930	* Only execute when the A20 gate is enabled because this lovely Hyper-V
1931	* blackbox does not seem to have any way to enable or disable A20.
1932	*/
1933	RT_NOREF(pVM);
1934	return PGMPhysIsA20Enabled(pVCpu);
1935	#else
1936	RT_NOREF(pVM, pVCpu);
1937	return true;
1938	#endif
1939	}
1940
1941
1942	bool nemR3NativeSetSingleInstruction(PVM pVM, PVMCPU pVCpu, bool fEnable)
1943	{
1944	NOREF(pVM); NOREF(pVCpu); NOREF(fEnable);
1945	return false;
1946	}
1947
1948
1949	/**
1950	* Forced flag notification call from VMEmt.h.
1951	*
1952	* This is only called when pVCpu is in the VMCPUSTATE_STARTED_EXEC_NEM state.
1953	*
1954	* @param pVM The cross context VM structure.
1955	* @param pVCpu The cross context virtual CPU structure of the CPU
1956	* to be notified.
1957	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_XXX.
1958	*/
1959	void nemR3NativeNotifyFF(PVM pVM, PVMCPU pVCpu, uint32_t fFlags)
1960	{
1961	#ifdef NEM_WIN_USE_OUR_OWN_RUN_API
1962	nemHCWinCancelRunVirtualProcessor(pVM, pVCpu);
1963	#else
1964	# ifdef NEM_WIN_WITH_RING0_RUNLOOP
1965	if (pVM->nem.s.fUseRing0Runloop)
1966	nemHCWinCancelRunVirtualProcessor(pVM, pVCpu);
1967	else
1968	# endif
1969	{
1970	Log8(("nemR3NativeNotifyFF: canceling %u\n", pVCpu->idCpu));
1971	HRESULT hrc = WHvCancelRunVirtualProcessor(pVM->nem.s.hPartition, pVCpu->idCpu, 0);
1972	AssertMsg(SUCCEEDED(hrc), ("WHvCancelRunVirtualProcessor -> hrc=%Rhrc\n", hrc));
1973	RT_NOREF_PV(hrc);
1974	}
1975	#endif
1976	RT_NOREF_PV(fFlags);
1977	}
1978
1979
1980	DECLINLINE(int) nemR3NativeGCPhys2R3PtrReadOnly(PVM pVM, RTGCPHYS GCPhys, const void **ppv)
1981	{
1982	PGMPAGEMAPLOCK Lock;
1983	int rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, GCPhys, ppv, &Lock);
1984	if (RT_SUCCESS(rc))
1985	PGMPhysReleasePageMappingLock(pVM, &Lock);
1986	return rc;
1987	}
1988
1989
1990	DECLINLINE(int) nemR3NativeGCPhys2R3PtrWriteable(PVM pVM, RTGCPHYS GCPhys, void **ppv)
1991	{
1992	PGMPAGEMAPLOCK Lock;
1993	int rc = PGMPhysGCPhys2CCPtr(pVM, GCPhys, ppv, &Lock);
1994	if (RT_SUCCESS(rc))
1995	PGMPhysReleasePageMappingLock(pVM, &Lock);
1996	return rc;
1997	}
1998
1999
2000	VMMR3_INT_DECL(int) NEMR3NotifyPhysRamRegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvR3,
2001	uint8_t pu2State, uint32_t puNemRange)
2002	{
2003	Log5(("NEMR3NotifyPhysRamRegister: %RGp LB %RGp, pvR3=%p pu2State=%p (%d) puNemRange=%p (%d)\n",
2004	GCPhys, cb, pvR3, pu2State, pu2State, puNemRange, *puNemRange));
2005
2006	*pu2State = UINT8_MAX;
2007	RT_NOREF(puNemRange);
2008
2009	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
2010	if (pvR3)
2011	{
2012	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
2013	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvR3, GCPhys, cb,
2014	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute);
2015	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
2016	if (SUCCEEDED(hrc))
2017	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
2018	else
2019	{
2020	LogRel(("NEMR3NotifyPhysRamRegister: GCPhys=%RGp LB %RGp pvR3=%p hrc=%Rhrc (%#x) Last=%#x/%u\n",
2021	GCPhys, cb, pvR3, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2022	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
2023	return VERR_NEM_MAP_PAGES_FAILED;
2024	}
2025	}
2026	#else
2027	RT_NOREF(pVM, GCPhys, cb, pvR3);
2028	#endif
2029	return VINF_SUCCESS;
2030	}
2031
2032
2033	VMMR3_INT_DECL(bool) NEMR3IsMmio2DirtyPageTrackingSupported(PVM pVM)
2034	{
2035	RT_NOREF(pVM);
2036	return g_pfnWHvQueryGpaRangeDirtyBitmap != NULL;
2037	}
2038
2039
2040	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExMapEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags,
2041	void pvRam, void pvMmio2, uint8_t pu2State, uint32_t puNemRange)
2042	{
2043	Log5(("NEMR3NotifyPhysMmioExMapEarly: %RGp LB %RGp fFlags=%#x pvRam=%p pvMmio2=%p pu2State=%p (%d) puNemRange=%p (%#x)\n",
2044	GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State, pu2State, puNemRange, puNemRange ? puNemRange : UINT32_MAX));
2045	RT_NOREF(puNemRange);
2046
2047	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
2048	/*
2049	* Unmap the RAM we're replacing.
2050	*/
2051	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE)
2052	{
2053	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfUnmapGpaRange, a);
2054	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, cb);
2055	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfUnmapGpaRange, a);
2056	if (SUCCEEDED(hrc))
2057	{ /* likely */ }
2058	else if (pvMmio2)
2059	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u (ignored)\n",
2060	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2061	else
2062	{
2063	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u\n",
2064	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2065	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
2066	return VERR_NEM_UNMAP_PAGES_FAILED;
2067	}
2068	}
2069
2070	/*
2071	* Map MMIO2 if any.
2072	*/
2073	if (pvMmio2)
2074	{
2075	Assert(fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2);
2076	WHV_MAP_GPA_RANGE_FLAGS fWHvFlags = WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute;
2077	if ((fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_TRACK_DIRTY_PAGES) && g_pfnWHvQueryGpaRangeDirtyBitmap)
2078	fWHvFlags \|= WHvMapGpaRangeFlagTrackDirtyPages;
2079	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
2080	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvMmio2, GCPhys, cb, fWHvFlags);
2081	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
2082	if (SUCCEEDED(hrc))
2083	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
2084	else
2085	{
2086	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x pvMmio2=%p fWHvFlags=%#x: Map -> hrc=%Rhrc (%#x) Last=%#x/%u\n",
2087	GCPhys, cb, fFlags, pvMmio2, fWHvFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2088	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
2089	return VERR_NEM_MAP_PAGES_FAILED;
2090	}
2091	}
2092	else
2093	{
2094	Assert(!(fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2));
2095	*pu2State = NEM_WIN_PAGE_STATE_UNMAPPED;
2096	}
2097	RT_NOREF(pvRam);
2098
2099	#else
2100	RT_NOREF(pVM, GCPhys, cb, pvRam, pvMmio2);
2101	*pu2State = (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE) ? UINT8_MAX : NEM_WIN_PAGE_STATE_UNMAPPED;
2102	#endif
2103	return VINF_SUCCESS;
2104	}
2105
2106
2107	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExMapLate(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags,
2108	void pvRam, void pvMmio2, uint32_t *puNemRange)
2109	{
2110	RT_NOREF(pVM, GCPhys, cb, fFlags, pvRam, pvMmio2, puNemRange);
2111	return VINF_SUCCESS;
2112	}
2113
2114
2115	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExUnmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags, void *pvRam,
2116	void pvMmio2, uint8_t pu2State)
2117	{
2118	Log5(("NEMR3NotifyPhysMmioExUnmap: %RGp LB %RGp fFlags=%#x pvRam=%p pvMmio2=%p pu2State=%p\n",
2119	GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State));
2120
2121	int rc = VINF_SUCCESS;
2122	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
2123	/*
2124	* Unmap the MMIO2 pages.
2125	*/
2126	/** @todo If we implement aliasing (MMIO2 page aliased into MMIO range),
2127	* we may have more stuff to unmap even in case of pure MMIO... */
2128	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2)
2129	{
2130	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfUnmapGpaRange, a);
2131	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, cb);
2132	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfUnmapGpaRange, a);
2133	if (FAILED(hrc))
2134	{
2135	LogRel2(("NEMR3NotifyPhysMmioExUnmap: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u (ignored)\n",
2136	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2137	rc = VERR_NEM_UNMAP_PAGES_FAILED;
2138	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
2139	}
2140	}
2141
2142	/*
2143	* Restore the RAM we replaced.
2144	*/
2145	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE)
2146	{
2147	AssertPtr(pvRam);
2148	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
2149	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvRam, GCPhys, cb,
2150	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute);
2151	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
2152	if (SUCCEEDED(hrc))
2153	{ /* likely */ }
2154	else
2155	{
2156	LogRel(("NEMR3NotifyPhysMmioExUnmap: GCPhys=%RGp LB %RGp pvMmio2=%p hrc=%Rhrc (%#x) Last=%#x/%u\n",
2157	GCPhys, cb, pvMmio2, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2158	rc = VERR_NEM_MAP_PAGES_FAILED;
2159	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
2160	}
2161	if (pu2State)
2162	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
2163	}
2164	/* Mark the pages as unmapped if relevant. */
2165	else if (pu2State)
2166	*pu2State = NEM_WIN_PAGE_STATE_UNMAPPED;
2167
2168	RT_NOREF(pvMmio2);
2169	#else
2170	RT_NOREF(pVM, GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State);
2171	if (pu2State)
2172	*pu2State = UINT8_MAX;
2173	#endif
2174	return rc;
2175	}
2176
2177
2178	VMMR3_INT_DECL(int) NEMR3PhysMmio2QueryAndResetDirtyBitmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t uNemRange,
2179	void *pvBitmap, size_t cbBitmap)
2180	{
2181	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
2182	Assert(VM_IS_NEM_ENABLED(pVM));
2183	AssertReturn(g_pfnWHvQueryGpaRangeDirtyBitmap, VERR_INTERNAL_ERROR_2);
2184	Assert(cbBitmap == (uint32_t)cbBitmap);
2185	RT_NOREF(uNemRange);
2186
2187	/* This is being profiled by PGM, see /PGM/Mmio2QueryAndResetDirtyBitmap. */
2188	HRESULT hrc = WHvQueryGpaRangeDirtyBitmap(pVM->nem.s.hPartition, GCPhys, cb, (UINT64 *)pvBitmap, (uint32_t)cbBitmap);
2189	if (SUCCEEDED(hrc))
2190	return VINF_SUCCESS;
2191
2192	AssertLogRelMsgFailed(("GCPhys=%RGp LB %RGp pvBitmap=%p LB %#zx hrc=%Rhrc (%#x) Last=%#x/%u\n",
2193	GCPhys, cb, pvBitmap, cbBitmap, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2194	return VERR_NEM_QUERY_DIRTY_BITMAP_FAILED;
2195
2196	#else
2197	RT_NOREF(pVM, GCPhys, cb, uNemRange, pvBitmap, cbBitmap);
2198	AssertFailed();
2199	return VERR_NOT_IMPLEMENTED;
2200	#endif
2201	}
2202
2203
2204	VMMR3_INT_DECL(int) NEMR3NotifyPhysRomRegisterEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvPages, uint32_t fFlags,
2205	uint8_t *pu2State)
2206	{
2207	Log5(("nemR3NativeNotifyPhysRomRegisterEarly: %RGp LB %RGp pvPages=%p fFlags=%#x\n", GCPhys, cb, pvPages, fFlags));
2208	*pu2State = UINT8_MAX;
2209
2210	#if 0 /* Let's not do this after all. We'll protection change notifications for each page and if not we'll map them lazily. */
2211	RTGCPHYS const cPages = cb >> X86_PAGE_SHIFT;
2212	for (RTGCPHYS iPage = 0; iPage < cPages; iPage++, GCPhys += X86_PAGE_SIZE)
2213	{
2214	const void *pvPage;
2215	int rc = nemR3NativeGCPhys2R3PtrReadOnly(pVM, GCPhys, &pvPage);
2216	if (RT_SUCCESS(rc))
2217	{
2218	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, (void *)pvPage, GCPhys, X86_PAGE_SIZE,
2219	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagExecute);
2220	if (SUCCEEDED(hrc))
2221	{ /* likely */ }
2222	else
2223	{
2224	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n",
2225	GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2226	return VERR_NEM_INIT_FAILED;
2227	}
2228	}
2229	else
2230	{
2231	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp rc=%Rrc\n", GCPhys, rc));
2232	return rc;
2233	}
2234	}
2235	RT_NOREF_PV(fFlags);
2236	#else
2237	RT_NOREF(pVM, GCPhys, cb, pvPages, fFlags);
2238	#endif
2239	return VINF_SUCCESS;
2240	}
2241
2242
2243	VMMR3_INT_DECL(int) NEMR3NotifyPhysRomRegisterLate(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvPages,
2244	uint32_t fFlags, uint8_t *pu2State)
2245	{
2246	Log5(("nemR3NativeNotifyPhysRomRegisterLate: %RGp LB %RGp pvPages=%p fFlags=%#x pu2State=%p\n",
2247	GCPhys, cb, pvPages, fFlags, pu2State));
2248	*pu2State = UINT8_MAX;
2249
2250	#if !defined(NEM_WIN_USE_HYPERCALLS_FOR_PAGES) && defined(VBOX_WITH_PGM_NEM_MODE)
2251	/*
2252	* (Re-)map readonly.
2253	*/
2254	AssertPtrReturn(pvPages, VERR_INVALID_POINTER);
2255	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
2256	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvPages, GCPhys, cb, WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagExecute);
2257	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
2258	if (SUCCEEDED(hrc))
2259	*pu2State = NEM_WIN_PAGE_STATE_READABLE;
2260	else
2261	{
2262	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp LB %RGp pvPages=%p fFlags=%#x hrc=%Rhrc (%#x) Last=%#x/%u\n",
2263	GCPhys, cb, pvPages, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2264	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
2265	return VERR_NEM_MAP_PAGES_FAILED;
2266	}
2267	RT_NOREF(fFlags);
2268	#else
2269	RT_NOREF(pVM, GCPhys, cb, pvPages, fFlags);
2270	#endif
2271	return VINF_SUCCESS;
2272	}
2273
2274	#ifdef NEM_WIN_WITH_A20
2275
2276	/**
2277	* @callback_method_impl{FNPGMPHYSNEMCHECKPAGE}
2278	*/
2279	static DECLCALLBACK(int) nemR3WinUnsetForA20CheckerCallback(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys,
2280	PPGMPHYSNEMPAGEINFO pInfo, void *pvUser)
2281	{
2282	/* We'll just unmap the memory. */
2283	if (pInfo->u2NemState > NEM_WIN_PAGE_STATE_UNMAPPED)
2284	{
2285	#ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
2286	int rc = nemHCWinHypercallUnmapPage(pVM, pVCpu, GCPhys);
2287	AssertRC(rc);
2288	if (RT_SUCCESS(rc))
2289	#else
2290	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, X86_PAGE_SIZE);
2291	if (SUCCEEDED(hrc))
2292	#endif
2293	{
2294	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPage);
2295	uint32_t cMappedPages = ASMAtomicDecU32(&pVM->nem.s.cMappedPages); NOREF(cMappedPages);
2296	Log5(("NEM GPA unmapped/A20: %RGp (was %s, cMappedPages=%u)\n", GCPhys, g_apszPageStates[pInfo->u2NemState], cMappedPages));
2297	pInfo->u2NemState = NEM_WIN_PAGE_STATE_UNMAPPED;
2298	}
2299	else
2300	{
2301	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
2302	#ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES
2303	LogRel(("nemR3WinUnsetForA20CheckerCallback/unmap: GCPhys=%RGp rc=%Rrc\n", GCPhys, rc));
2304	return rc;
2305	#else
2306	LogRel(("nemR3WinUnsetForA20CheckerCallback/unmap: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n",
2307	GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2308	return VERR_INTERNAL_ERROR_2;
2309	#endif
2310	}
2311	}
2312	RT_NOREF(pVCpu, pvUser);
2313	return VINF_SUCCESS;
2314	}
2315
2316
2317	/**
2318	* Unmaps a page from Hyper-V for the purpose of emulating A20 gate behavior.
2319	*
2320	* @returns The PGMPhysNemQueryPageInfo result.
2321	* @param pVM The cross context VM structure.
2322	* @param pVCpu The cross context virtual CPU structure.
2323	* @param GCPhys The page to unmap.
2324	*/
2325	static int nemR3WinUnmapPageForA20Gate(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys)
2326	{
2327	PGMPHYSNEMPAGEINFO Info;
2328	return PGMPhysNemPageInfoChecker(pVM, pVCpu, GCPhys, false /fMakeWritable/, &Info,
2329	nemR3WinUnsetForA20CheckerCallback, NULL);
2330	}
2331
2332	#endif /* NEM_WIN_WITH_A20 */
2333
2334	/**
2335	* Called when the A20 state changes.
2336	*
2337	* Hyper-V doesn't seem to offer a simple way of implementing the A20 line
2338	* features of PCs. So, we do a very minimal emulation of the HMA to make DOS
2339	* happy.
2340	*
2341	* @param pVCpu The CPU the A20 state changed on.
2342	* @param fEnabled Whether it was enabled (true) or disabled.
2343	*/
2344	VMMR3_INT_DECL(void) NEMR3NotifySetA20(PVMCPU pVCpu, bool fEnabled)
2345	{
2346	Log(("nemR3NativeNotifySetA20: fEnabled=%RTbool\n", fEnabled));
2347	Assert(VM_IS_NEM_ENABLED(pVCpu->CTX_SUFF(pVM)));
2348	#ifdef NEM_WIN_WITH_A20
2349	PVM pVM = pVCpu->CTX_SUFF(pVM);
2350	if (!pVM->nem.s.fA20Fixed)
2351	{
2352	pVM->nem.s.fA20Enabled = fEnabled;
2353	for (RTGCPHYS GCPhys = _1M; GCPhys < _1M + _64K; GCPhys += X86_PAGE_SIZE)
2354	nemR3WinUnmapPageForA20Gate(pVM, pVCpu, GCPhys);
2355	}
2356	#else
2357	RT_NOREF(pVCpu, fEnabled);
2358	#endif
2359	}
2360
2361
2362	/** @page pg_nem_win NEM/win - Native Execution Manager, Windows.
2363	*
2364	* On Windows the Hyper-V root partition (dom0 in zen terminology) does not have
2365	* nested VT-x or AMD-V capabilities. Early on raw-mode worked inside it, but
2366	* for a while now we've been getting \#GPs when trying to modify CR4 in the
2367	* world switcher. So, when Hyper-V is active on Windows we have little choice
2368	* but to use Hyper-V to run our VMs.
2369	*
2370	*
2371	* @section sub_nem_win_whv The WinHvPlatform API
2372	*
2373	* Since Windows 10 build 17083 there is a documented API for managing Hyper-V
2374	* VMs: header file WinHvPlatform.h and implementation in WinHvPlatform.dll.
2375	* This interface is a wrapper around the undocumented Virtualization
2376	* Infrastructure Driver (VID) API - VID.DLL and VID.SYS. The wrapper is
2377	* written in C++, namespaced, early versions (at least) was using standard C++
2378	* container templates in several places.
2379	*
2380	* When creating a VM using WHvCreatePartition, it will only create the
2381	* WinHvPlatform structures for it, to which you get an abstract pointer. The
2382	* VID API that actually creates the partition is first engaged when you call
2383	* WHvSetupPartition after first setting a lot of properties using
2384	* WHvSetPartitionProperty. Since the VID API is just a very thin wrapper
2385	* around CreateFile and NtDeviceIoControlFile, it returns an actual HANDLE for
2386	* the partition to WinHvPlatform. We fish this HANDLE out of the WinHvPlatform
2387	* partition structures because we need to talk directly to VID for reasons
2388	* we'll get to in a bit. (Btw. we could also intercept the CreateFileW or
2389	* NtDeviceIoControlFile calls from VID.DLL to get the HANDLE should fishing in
2390	* the partition structures become difficult.)
2391	*
2392	* The WinHvPlatform API requires us to both set the number of guest CPUs before
2393	* setting up the partition and call WHvCreateVirtualProcessor for each of them.
2394	* The CPU creation function boils down to a VidMessageSlotMap call that sets up
2395	* and maps a message buffer into ring-3 for async communication with hyper-V
2396	* and/or the VID.SYS thread actually running the CPU thru
2397	* WinHvRunVpDispatchLoop(). When for instance a VMEXIT is encountered, hyper-V
2398	* sends a message that the WHvRunVirtualProcessor API retrieves (and later
2399	* acknowledges) via VidMessageSlotHandleAndGetNext. Since or about build
2400	* 17757 a register page is also mapped into user space when creating the
2401	* virtual CPU. It should be noteded that WHvDeleteVirtualProcessor doesn't do
2402	* much as there seems to be no partner function VidMessagesSlotMap that
2403	* reverses what it did.
2404	*
2405	* Memory is managed thru calls to WHvMapGpaRange and WHvUnmapGpaRange (GPA does
2406	* not mean grade point average here, but rather guest physical addressspace),
2407	* which corresponds to VidCreateVaGpaRangeSpecifyUserVa and VidDestroyGpaRange
2408	* respectively. As 'UserVa' indicates, the functions works on user process
2409	* memory. The mappings are also subject to quota restrictions, so the number
2410	* of ranges are limited and probably their total size as well. Obviously
2411	* VID.SYS keeps track of the ranges, but so does WinHvPlatform, which means
2412	* there is a bit of overhead involved and quota restrctions makes sense.
2413	*
2414	* Running guest code is done through the WHvRunVirtualProcessor function. It
2415	* asynchronously starts or resumes hyper-V CPU execution and then waits for an
2416	* VMEXIT message. Hyper-V / VID.SYS will return information about the message
2417	* in the message buffer mapping, and WHvRunVirtualProcessor will convert that
2418	* finto it's own WHV_RUN_VP_EXIT_CONTEXT format.
2419	*
2420	* Other threads can interrupt the execution by using WHvCancelVirtualProcessor,
2421	* which since or about build 17757 uses VidMessageSlotHandleAndGetNext to do
2422	* the work (earlier builds would open the waiting thread, do a dummy
2423	* QueueUserAPC on it, and let it upon return use VidStopVirtualProcessor to
2424	* do the actual stopping). While there is certainly a race between cancelation
2425	* and the CPU causing a natural VMEXIT, it is not known whether this still
2426	* causes extra work on subsequent WHvRunVirtualProcessor calls (it did in and
2427	* earlier 17134).
2428	*
2429	* Registers are retrieved and set via WHvGetVirtualProcessorRegisters and
2430	* WHvSetVirtualProcessorRegisters. In addition, several VMEXITs include
2431	* essential register state in the exit context information, potentially making
2432	* it possible to emulate the instruction causing the exit without involving
2433	* WHvGetVirtualProcessorRegisters.
2434	*
2435	*
2436	* @subsection subsec_nem_win_whv_cons Issues & Feedback
2437	*
2438	* Here are some observations (mostly against build 17101):
2439	*
2440	* - The VMEXIT performance is dismal (build 17134).
2441	*
2442	* Our proof of concept implementation with a kernel runloop (i.e. not using
2443	* WHvRunVirtualProcessor and friends, but calling VID.SYS fast I/O control
2444	* entry point directly) delivers 9-10% of the port I/O performance and only
2445	* 6-7% of the MMIO performance that we have with our own hypervisor.
2446	*
2447	* When using the offical WinHvPlatform API, the numbers are %3 for port I/O
2448	* and 5% for MMIO.
2449	*
2450	* While the tests we've done are using tight tight loops only doing port I/O
2451	* and MMIO, the problem is clearly visible when running regular guest OSes.
2452	* Anything that hammers the VGA device would be suffering, for example:
2453	*
2454	* - Windows 2000 boot screen animation overloads us with MMIO exits
2455	* and won't even boot because all the time is spent in interrupt
2456	* handlers and redrawin the screen.
2457	*
2458	* - DSL 4.4 and its bootmenu logo is slower than molasses in january.
2459	*
2460	* We have not found a workaround for this yet.
2461	*
2462	* Something that might improve the issue a little is to detect blocks with
2463	* excessive MMIO and port I/O exits and emulate instructions to cover
2464	* multiple exits before letting Hyper-V have a go at the guest execution
2465	* again. This will only improve the situation under some circumstances,
2466	* since emulating instructions without recompilation can be expensive, so
2467	* there will only be real gains if the exitting instructions are tightly
2468	* packed.
2469	*
2470	* Update: Security fixes during the summer of 2018 caused the performance to
2471	* dropped even more.
2472	*
2473	* Update [build 17757]: Some performance improvements here, but they don't
2474	* yet make up for what was lost this summer.
2475	*
2476	*
2477	* - We need a way to directly modify the TSC offset (or bias if you like).
2478	*
2479	* The current approach of setting the WHvX64RegisterTsc register one by one
2480	* on each virtual CPU in sequence will introduce random inaccuracies,
2481	* especially if the thread doing the job is reschduled at a bad time.
2482	*
2483	*
2484	* - Unable to access WHvX64RegisterMsrMtrrCap (build 17134).
2485	*
2486	*
2487	* - On AMD Ryzen grub/debian 9.0 ends up with a unrecoverable exception
2488	* when IA32_MTRR_PHYSMASK0 is written.
2489	*
2490	*
2491	* - The IA32_APIC_BASE register does not work right:
2492	*
2493	* - Attempts by the guest to clear bit 11 (EN) are ignored, both the
2494	* guest and the VMM reads back the old value.
2495	*
2496	* - Attempts to modify the base address (bits NN:12) seems to be ignored
2497	* in the same way.
2498	*
2499	* - The VMM can modify both the base address as well as the the EN and
2500	* BSP bits, however this is useless if we cannot intercept the WRMSR.
2501	*
2502	* - Attempts by the guest to set the EXTD bit (X2APIC) result in \#GP(0),
2503	* while the VMM ends up with with ERROR_HV_INVALID_PARAMETER. Seems
2504	* there is no way to support X2APIC.
2505	*
2506	*
2507	* - Not sure if this is a thing, but WHvCancelVirtualProcessor seems to cause
2508	* cause a lot more spurious WHvRunVirtualProcessor returns that what we get
2509	* with the replacement code. By spurious returns we mean that the
2510	* subsequent call to WHvRunVirtualProcessor would return immediately.
2511	*
2512	* Update [build 17757]: New cancelation code might have addressed this, but
2513	* haven't had time to test it yet.
2514	*
2515	*
2516	* - There is no API for modifying protection of a page within a GPA range.
2517	*
2518	* From what we can tell, the only way to modify the protection (like readonly
2519	* -> writable, or vice versa) is to first unmap the range and then remap it
2520	* with the new protection.
2521	*
2522	* We are for instance doing this quite a bit in order to track dirty VRAM
2523	* pages. VRAM pages starts out as readonly, when the guest writes to a page
2524	* we take an exit, notes down which page it is, makes it writable and restart
2525	* the instruction. After refreshing the display, we reset all the writable
2526	* pages to readonly again, bulk fashion.
2527	*
2528	* Now to work around this issue, we do page sized GPA ranges. In addition to
2529	* add a lot of tracking overhead to WinHvPlatform and VID.SYS, this also
2530	* causes us to exceed our quota before we've even mapped a default sized
2531	* (128MB) VRAM page-by-page. So, to work around this quota issue we have to
2532	* lazily map pages and actively restrict the number of mappings.
2533	*
2534	* Our best workaround thus far is bypassing WinHvPlatform and VID entirely
2535	* when in comes to guest memory management and instead use the underlying
2536	* hypercalls (HvCallMapGpaPages, HvCallUnmapGpaPages) to do it ourselves.
2537	* (This also maps a whole lot better into our own guest page management
2538	* infrastructure.)
2539	*
2540	* Update [build 17757]: Introduces a KVM like dirty logging API which could
2541	* help tracking dirty VGA pages, while being useless for shadow ROM and
2542	* devices trying catch the guest updating descriptors and such.
2543	*
2544	*
2545	* - Observed problems doing WHvUnmapGpaRange immediately followed by
2546	* WHvMapGpaRange.
2547	*
2548	* As mentioned above, we've been forced to use this sequence when modifying
2549	* page protection. However, when transitioning from readonly to writable,
2550	* we've ended up looping forever with the same write to readonly memory
2551	* VMEXIT. We're wondering if this issue might be related to the lazy mapping
2552	* logic in WinHvPlatform.
2553	*
2554	* Workaround: Insert a WHvRunVirtualProcessor call and make sure to get a GPA
2555	* unmapped exit between the two calls. Not entirely great performance wise
2556	* (or the santity of our code).
2557	*
2558	*
2559	* - Implementing A20 gate behavior is tedious, where as correctly emulating the
2560	* A20M# pin (present on 486 and later) is near impossible for SMP setups
2561	* (e.g. possiblity of two CPUs with different A20 status).
2562	*
2563	* Workaround #1 (obsolete): Only do A20 on CPU 0, restricting the emulation
2564	* to HMA. We unmap all pages related to HMA (0x100000..0x10ffff) when the A20
2565	* state changes, lazily syncing the right pages back when accessed.
2566	*
2567	* Workaround #2 (used): Use IEM when the A20 gate is disabled.
2568	*
2569	*
2570	* - WHVRunVirtualProcessor wastes time converting VID/Hyper-V messages to its
2571	* own format (WHV_RUN_VP_EXIT_CONTEXT).
2572	*
2573	* We understand this might be because Microsoft wishes to remain free to
2574	* modify the VID/Hyper-V messages, but it's still rather silly and does slow
2575	* things down a little. We'd much rather just process the messages directly.
2576	*
2577	*
2578	* - WHVRunVirtualProcessor would've benefited from using a callback interface:
2579	*
2580	* - The potential size changes of the exit context structure wouldn't be
2581	* an issue, since the function could manage that itself.
2582	*
2583	* - State handling could probably be simplified (like cancelation).
2584	*
2585	*
2586	* - WHvGetVirtualProcessorRegisters and WHvSetVirtualProcessorRegisters
2587	* internally converts register names, probably using temporary heap buffers.
2588	*
2589	* From the looks of things, they are converting from WHV_REGISTER_NAME to
2590	* HV_REGISTER_NAME from in the "Virtual Processor Register Names" section in
2591	* the "Hypervisor Top-Level Functional Specification" document. This feels
2592	* like an awful waste of time.
2593	*
2594	* We simply cannot understand why HV_REGISTER_NAME isn't used directly here,
2595	* or at least the same values, making any conversion reduntant. Restricting
2596	* access to certain registers could easily be implement by scanning the
2597	* inputs.
2598	*
2599	* To avoid the heap + conversion overhead, we're currently using the
2600	* HvCallGetVpRegisters and HvCallSetVpRegisters calls directly, at least for
2601	* the ring-0 code.
2602	*
2603	* Update [build 17757]: Register translation has been very cleverly
2604	* optimized and made table driven (2 top level tables, 4 + 1 leaf tables).
2605	* Register information consists of the 32-bit HV register name, register page
2606	* offset, and flags (giving valid offset, size and more). Register
2607	* getting/settings seems to be done by hoping that the register page provides
2608	* it all, and falling back on the VidSetVirtualProcessorState if one or more
2609	* registers are not available there.
2610	*
2611	* Note! We have currently not updated our ring-0 code to take the register
2612	* page into account, so it's suffering a little compared to the ring-3 code
2613	* that now uses the offical APIs for registers.
2614	*
2615	*
2616	* - The YMM and XCR0 registers are not yet named (17083). This probably
2617	* wouldn't be a problem if HV_REGISTER_NAME was used, see previous point.
2618	*
2619	* Update [build 17757]: XCR0 is added. YMM register values seems to be put
2620	* into a yet undocumented XsaveState interface. Approach is a little bulky,
2621	* but saves number of enums and dispenses with register transation. Also,
2622	* the underlying Vid setter API duplicates the input buffer on the heap,
2623	* adding a 16 byte header.
2624	*
2625	*
2626	* - Why does VID.SYS only query/set 32 registers at the time thru the
2627	* HvCallGetVpRegisters and HvCallSetVpRegisters hypercalls?
2628	*
2629	* We've not trouble getting/setting all the registers defined by
2630	* WHV_REGISTER_NAME in one hypercall (around 80). Some kind of stack
2631	* buffering or similar?
2632	*
2633	*
2634	* - To handle the VMMCALL / VMCALL instructions, it seems we need to intercept
2635	* \#UD exceptions and inspect the opcodes. A dedicated exit for hypercalls
2636	* would be more efficient, esp. for guests using \#UD for other purposes..
2637	*
2638	*
2639	* - Wrong instruction length in the VpContext with unmapped GPA memory exit
2640	* contexts on 17115/AMD.
2641	*
2642	* One byte "PUSH CS" was reported as 2 bytes, while a two byte
2643	* "MOV [EBX],EAX" was reported with a 1 byte instruction length. Problem
2644	* naturally present in untranslated hyper-v messages.
2645	*
2646	*
2647	* - The I/O port exit context information seems to be missing the address size
2648	* information needed for correct string I/O emulation.
2649	*
2650	* VT-x provides this information in bits 7:9 in the instruction information
2651	* field on newer CPUs. AMD-V in bits 7:9 in the EXITINFO1 field in the VMCB.
2652	*
2653	* We can probably work around this by scanning the instruction bytes for
2654	* address size prefixes. Haven't investigated it any further yet.
2655	*
2656	*
2657	* - Querying WHvCapabilityCodeExceptionExitBitmap returns zero even when
2658	* intercepts demonstrably works (17134).
2659	*
2660	*
2661	* - Querying HvPartitionPropertyDebugChannelId via HvCallGetPartitionProperty
2662	* (hypercall) hangs the host (17134).
2663	*
2664	* - CommonUtilities::GuidToString needs a 'static' before the hex digit array,
2665	* looks pointless to re-init a stack copy it for each call (novice mistake).
2666	*
2667	*
2668	* Old concerns that have been addressed:
2669	*
2670	* - The WHvCancelVirtualProcessor API schedules a dummy usermode APC callback
2671	* in order to cancel any current or future alertable wait in VID.SYS during
2672	* the VidMessageSlotHandleAndGetNext call.
2673	*
2674	* IIRC this will make the kernel schedule the specified callback thru
2675	* NTDLL!KiUserApcDispatcher by modifying the thread context and quite
2676	* possibly the userland thread stack. When the APC callback returns to
2677	* KiUserApcDispatcher, it will call NtContinue to restore the old thread
2678	* context and resume execution from there. This naturally adds up to some
2679	* CPU cycles, ring transitions aren't for free, especially after Spectre &
2680	* Meltdown mitigations.
2681	*
2682	* Using NtAltertThread call could do the same without the thread context
2683	* modifications and the extra kernel call.
2684	*
2685	* Update: All concerns have addressed in or about build 17757.
2686	*
2687	* The WHvCancelVirtualProcessor API is now implemented using a new
2688	* VidMessageSlotHandleAndGetNext() flag (4). Codepath is slightly longer
2689	* than NtAlertThread, but has the added benefit that spurious wakeups can be
2690	* more easily reduced.
2691	*
2692	*
2693	* - When WHvRunVirtualProcessor returns without a message, or on a terse
2694	* VID message like HLT, it will make a kernel call to get some registers.
2695	* This is potentially inefficient if the caller decides he needs more
2696	* register state.
2697	*
2698	* It would be better to just return what's available and let the caller fetch
2699	* what is missing from his point of view in a single kernel call.
2700	*
2701	* Update: All concerns have been addressed in or about build 17757. Selected
2702	* registers are now available via shared memory and thus HLT should (not
2703	* verified) no longer require a system call to compose the exit context data.
2704	*
2705	*
2706	* - The WHvRunVirtualProcessor implementation does lazy GPA range mappings when
2707	* a unmapped GPA message is received from hyper-V.
2708	*
2709	* Since MMIO is currently realized as unmapped GPA, this will slow down all
2710	* MMIO accesses a tiny little bit as WHvRunVirtualProcessor looks up the
2711	* guest physical address to check if it is a pending lazy mapping.
2712	*
2713	* The lazy mapping feature makes no sense to us. We as API user have all the
2714	* information and can do lazy mapping ourselves if we want/have to (see next
2715	* point).
2716	*
2717	* Update: All concerns have been addressed in or about build 17757.
2718	*
2719	*
2720	* - The WHvGetCapability function has a weird design:
2721	* - The CapabilityCode parameter is pointlessly duplicated in the output
2722	* structure (WHV_CAPABILITY).
2723	*
2724	* - API takes void pointer, but everyone will probably be using
2725	* WHV_CAPABILITY due to WHV_CAPABILITY::CapabilityCode making it
2726	* impractical to use anything else.
2727	*
2728	* - No output size.
2729	*
2730	* - See GetFileAttributesEx, GetFileInformationByHandleEx,
2731	* FindFirstFileEx, and others for typical pattern for generic
2732	* information getters.
2733	*
2734	* Update: All concerns have been addressed in build 17110.
2735	*
2736	*
2737	* - The WHvGetPartitionProperty function uses the same weird design as
2738	* WHvGetCapability, see above.
2739	*
2740	* Update: All concerns have been addressed in build 17110.
2741	*
2742	*
2743	* - The WHvSetPartitionProperty function has a totally weird design too:
2744	* - In contrast to its partner WHvGetPartitionProperty, the property code
2745	* is not a separate input parameter here but part of the input
2746	* structure.
2747	*
2748	* - The input structure is a void pointer rather than a pointer to
2749	* WHV_PARTITION_PROPERTY which everyone probably will be using because
2750	* of the WHV_PARTITION_PROPERTY::PropertyCode field.
2751	*
2752	* - Really, why use PVOID for the input when the function isn't accepting
2753	* minimal sizes. E.g. WHVPartitionPropertyCodeProcessorClFlushSize only
2754	* requires a 9 byte input, but the function insists on 16 bytes (17083).
2755	*
2756	* - See GetFileAttributesEx, SetFileInformationByHandle, FindFirstFileEx,
2757	* and others for typical pattern for generic information setters and
2758	* getters.
2759	*
2760	* Update: All concerns have been addressed in build 17110.
2761	*
2762	*
2763	*
2764	* @section sec_nem_win_impl Our implementation.
2765	*
2766	* We set out with the goal of wanting to run as much as possible in ring-0,
2767	* reasoning that this would give use the best performance.
2768	*
2769	* This goal was approached gradually, starting out with a pure WinHvPlatform
2770	* implementation, gradually replacing parts: register access, guest memory
2771	* handling, running virtual processors. Then finally moving it all into
2772	* ring-0, while keeping most of it configurable so that we could make
2773	* comparisons (see NEMInternal.h and nemR3NativeRunGC()).
2774	*
2775	*
2776	* @subsection subsect_nem_win_impl_ioctl VID.SYS I/O control calls
2777	*
2778	* To run things in ring-0 we need to talk directly to VID.SYS thru its I/O
2779	* control interface. Looking at changes between like build 17083 and 17101 (if
2780	* memory serves) a set of the VID I/O control numbers shifted a little, which
2781	* means we need to determin them dynamically. We currently do this by hooking
2782	* the NtDeviceIoControlFile API call from VID.DLL and snooping up the
2783	* parameters when making dummy calls to relevant APIs. (We could also
2784	* disassemble the relevant APIs and try fish out the information from that, but
2785	* this is way simpler.)
2786	*
2787	* Issuing I/O control calls from ring-0 is facing a small challenge with
2788	* respect to direct buffering. When using direct buffering the device will
2789	* typically check that the buffer is actually in the user address space range
2790	* and reject kernel addresses. Fortunately, we've got the cross context VM
2791	* structure that is mapped into both kernel and user space, it's also locked
2792	* and safe to access from kernel space. So, we place the I/O control buffers
2793	* in the per-CPU part of it (NEMCPU::uIoCtlBuf) and give the driver the user
2794	* address if direct access buffering or kernel address if not.
2795	*
2796	* The I/O control calls are 'abstracted' in the support driver, see
2797	* SUPR0IoCtlSetupForHandle(), SUPR0IoCtlPerform() and SUPR0IoCtlCleanup().
2798	*
2799	*
2800	* @subsection subsect_nem_win_impl_cpumctx CPUMCTX
2801	*
2802	* Since the CPU state needs to live in Hyper-V when executing, we probably
2803	* should not transfer more than necessary when handling VMEXITs. To help us
2804	* manage this CPUMCTX got a new field CPUMCTX::fExtrn that to indicate which
2805	* part of the state is currently externalized (== in Hyper-V).
2806	*
2807	*
2808	* @subsection sec_nem_win_benchmarks Benchmarks.
2809	*
2810	* @subsubsection subsect_nem_win_benchmarks_bs2t1 17134/2018-06-22: Bootsector2-test1
2811	*
2812	* This is ValidationKit/bootsectors/bootsector2-test1.asm as of 2018-06-22
2813	* (internal r123172) running a the release build of VirtualBox from the same
2814	* source, though with exit optimizations disabled. Host is AMD Threadripper 1950X
2815	* running out an up to date 64-bit Windows 10 build 17134.
2816	*
2817	* The base line column is using the official WinHv API for everything but physical
2818	* memory mapping. The 2nd column is the default NEM/win configuration where we
2819	* put the main execution loop in ring-0, using hypercalls when we can and VID for
2820	* managing execution. The 3rd column is regular VirtualBox using AMD-V directly,
2821	* hyper-V is disabled, main execution loop in ring-0.
2822	*
2823	* @verbatim
2824	TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V
2825	32-bit paged protected mode, CPUID : 108 874 ins/sec 113% / 123 602 1198% / 1 305 113
2826	32-bit pae protected mode, CPUID : 106 722 ins/sec 115% / 122 740 1232% / 1 315 201
2827	64-bit long mode, CPUID : 106 798 ins/sec 114% / 122 111 1198% / 1 280 404
2828	16-bit unpaged protected mode, CPUID : 106 835 ins/sec 114% / 121 994 1216% / 1 299 665
2829	32-bit unpaged protected mode, CPUID : 105 257 ins/sec 115% / 121 772 1235% / 1 300 860
2830	real mode, CPUID : 104 507 ins/sec 116% / 121 800 1228% / 1 283 848
2831	CPUID EAX=1 : PASSED
2832	32-bit paged protected mode, RDTSC : 99 581 834 ins/sec 100% / 100 323 307 93% / 93 473 299
2833	32-bit pae protected mode, RDTSC : 99 620 585 ins/sec 100% / 99 960 952 84% / 83 968 839
2834	64-bit long mode, RDTSC : 100 540 009 ins/sec 100% / 100 946 372 93% / 93 652 826
2835	16-bit unpaged protected mode, RDTSC : 99 688 473 ins/sec 100% / 100 097 751 76% / 76 281 287
2836	32-bit unpaged protected mode, RDTSC : 98 385 857 ins/sec 102% / 100 510 404 94% / 93 379 536
2837	real mode, RDTSC : 100 087 967 ins/sec 101% / 101 386 138 93% / 93 234 999
2838	RDTSC : PASSED
2839	32-bit paged protected mode, Read CR4 : 2 156 102 ins/sec 98% / 2 121 967 17114% / 369 009 009
2840	32-bit pae protected mode, Read CR4 : 2 163 820 ins/sec 98% / 2 133 804 17469% / 377 999 261
2841	64-bit long mode, Read CR4 : 2 164 822 ins/sec 98% / 2 128 698 18875% / 408 619 313
2842	16-bit unpaged protected mode, Read CR4 : 2 162 367 ins/sec 100% / 2 168 508 17132% / 370 477 568
2843	32-bit unpaged protected mode, Read CR4 : 2 163 189 ins/sec 100% / 2 169 808 16768% / 362 734 679
2844	real mode, Read CR4 : 2 162 436 ins/sec 100% / 2 164 914 15551% / 336 288 998
2845	Read CR4 : PASSED
2846	real mode, 32-bit IN : 104 649 ins/sec 118% / 123 513 1028% / 1 075 831
2847	real mode, 32-bit OUT : 107 102 ins/sec 115% / 123 660 982% / 1 052 259
2848	real mode, 32-bit IN-to-ring-3 : 105 697 ins/sec 98% / 104 471 201% / 213 216
2849	real mode, 32-bit OUT-to-ring-3 : 105 830 ins/sec 98% / 104 598 198% / 210 495
2850	16-bit unpaged protected mode, 32-bit IN : 104 855 ins/sec 117% / 123 174 1029% / 1 079 591
2851	16-bit unpaged protected mode, 32-bit OUT : 107 529 ins/sec 115% / 124 250 992% / 1 067 053
2852	16-bit unpaged protected mode, 32-bit IN-to-ring-3 : 106 337 ins/sec 103% / 109 565 196% / 209 367
2853	16-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 107 558 ins/sec 100% / 108 237 191% / 206 387
2854	32-bit unpaged protected mode, 32-bit IN : 106 351 ins/sec 116% / 123 584 1016% / 1 081 325
2855	32-bit unpaged protected mode, 32-bit OUT : 106 424 ins/sec 116% / 124 252 995% / 1 059 408
2856	32-bit unpaged protected mode, 32-bit IN-to-ring-3 : 104 035 ins/sec 101% / 105 305 202% / 210 750
2857	32-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 103 831 ins/sec 102% / 106 919 205% / 213 198
2858	32-bit paged protected mode, 32-bit IN : 103 356 ins/sec 119% / 123 870 1041% / 1 076 463
2859	32-bit paged protected mode, 32-bit OUT : 107 177 ins/sec 115% / 124 302 998% / 1 069 655
2860	32-bit paged protected mode, 32-bit IN-to-ring-3 : 104 491 ins/sec 100% / 104 744 200% / 209 264
2861	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 106 603 ins/sec 97% / 103 849 197% / 210 219
2862	32-bit pae protected mode, 32-bit IN : 105 923 ins/sec 115% / 122 759 1041% / 1 103 261
2863	32-bit pae protected mode, 32-bit OUT : 107 083 ins/sec 117% / 126 057 1024% / 1 096 667
2864	32-bit pae protected mode, 32-bit IN-to-ring-3 : 106 114 ins/sec 97% / 103 496 199% / 211 312
2865	32-bit pae protected mode, 32-bit OUT-to-ring-3 : 105 675 ins/sec 96% / 102 096 198% / 209 890
2866	64-bit long mode, 32-bit IN : 105 800 ins/sec 113% / 120 006 1013% / 1 072 116
2867	64-bit long mode, 32-bit OUT : 105 635 ins/sec 113% / 120 375 997% / 1 053 655
2868	64-bit long mode, 32-bit IN-to-ring-3 : 105 274 ins/sec 95% / 100 763 197% / 208 026
2869	64-bit long mode, 32-bit OUT-to-ring-3 : 106 262 ins/sec 94% / 100 749 196% / 209 288
2870	NOP I/O Port Access : PASSED
2871	32-bit paged protected mode, 32-bit read : 57 687 ins/sec 119% / 69 136 1197% / 690 548
2872	32-bit paged protected mode, 32-bit write : 57 957 ins/sec 118% / 68 935 1183% / 685 930
2873	32-bit paged protected mode, 32-bit read-to-ring-3 : 57 958 ins/sec 95% / 55 432 276% / 160 505
2874	32-bit paged protected mode, 32-bit write-to-ring-3 : 57 922 ins/sec 100% / 58 340 304% / 176 464
2875	32-bit pae protected mode, 32-bit read : 57 478 ins/sec 119% / 68 453 1141% / 656 159
2876	32-bit pae protected mode, 32-bit write : 57 226 ins/sec 118% / 68 097 1157% / 662 504
2877	32-bit pae protected mode, 32-bit read-to-ring-3 : 57 582 ins/sec 94% / 54 651 268% / 154 867
2878	32-bit pae protected mode, 32-bit write-to-ring-3 : 57 697 ins/sec 100% / 57 750 299% / 173 030
2879	64-bit long mode, 32-bit read : 57 128 ins/sec 118% / 67 779 1071% / 611 949
2880	64-bit long mode, 32-bit write : 57 127 ins/sec 118% / 67 632 1084% / 619 395
2881	64-bit long mode, 32-bit read-to-ring-3 : 57 181 ins/sec 94% / 54 123 265% / 151 937
2882	64-bit long mode, 32-bit write-to-ring-3 : 57 297 ins/sec 99% / 57 286 294% / 168 694
2883	16-bit unpaged protected mode, 32-bit read : 58 827 ins/sec 118% / 69 545 1185% / 697 602
2884	16-bit unpaged protected mode, 32-bit write : 58 678 ins/sec 118% / 69 442 1183% / 694 387
2885	16-bit unpaged protected mode, 32-bit read-to-ring-3 : 57 841 ins/sec 96% / 55 730 275% / 159 163
2886	16-bit unpaged protected mode, 32-bit write-to-ring-3 : 57 855 ins/sec 101% / 58 834 304% / 176 169
2887	32-bit unpaged protected mode, 32-bit read : 58 063 ins/sec 120% / 69 690 1233% / 716 444
2888	32-bit unpaged protected mode, 32-bit write : 57 936 ins/sec 120% / 69 633 1199% / 694 753
2889	32-bit unpaged protected mode, 32-bit read-to-ring-3 : 58 451 ins/sec 96% / 56 183 273% / 159 972
2890	32-bit unpaged protected mode, 32-bit write-to-ring-3 : 58 962 ins/sec 99% / 58 955 298% / 175 936
2891	real mode, 32-bit read : 58 571 ins/sec 118% / 69 478 1160% / 679 917
2892	real mode, 32-bit write : 58 418 ins/sec 118% / 69 320 1185% / 692 513
2893	real mode, 32-bit read-to-ring-3 : 58 072 ins/sec 96% / 55 751 274% / 159 145
2894	real mode, 32-bit write-to-ring-3 : 57 870 ins/sec 101% / 58 755 307% / 178 042
2895	NOP MMIO Access : PASSED
2896	SUCCESS
2897	* @endverbatim
2898	*
2899	* What we see here is:
2900	*
2901	* - The WinHv API approach is 10 to 12 times slower for exits we can
2902	* handle directly in ring-0 in the VBox AMD-V code.
2903	*
2904	* - The WinHv API approach is 2 to 3 times slower for exits we have to
2905	* go to ring-3 to handle with the VBox AMD-V code.
2906	*
2907	* - By using hypercalls and VID.SYS from ring-0 we gain between
2908	* 13% and 20% over the WinHv API on exits handled in ring-0.
2909	*
2910	* - For exits requiring ring-3 handling are between 6% slower and 3% faster
2911	* than the WinHv API.
2912	*
2913	*
2914	* As a side note, it looks like Hyper-V doesn't let the guest read CR4 but
2915	* triggers exits all the time. This isn't all that important these days since
2916	* OSes like Linux cache the CR4 value specifically to avoid these kinds of exits.
2917	*
2918	*
2919	* @subsubsection subsect_nem_win_benchmarks_bs2t1u1 17134/2018-10-02: Bootsector2-test1
2920	*
2921	* Update on 17134. While expectantly testing a couple of newer builds (17758,
2922	* 17763) hoping for some increases in performance, the numbers turned out
2923	* altogether worse than the June test run. So, we went back to the 1803
2924	* (17134) installation, made sure it was fully up to date (as per 2018-10-02)
2925	* and re-tested.
2926	*
2927	* The numbers had somehow turned significantly worse over the last 3-4 months,
2928	* dropping around 70% for the WinHv API test, more for Hypercalls + VID.
2929	*
2930	* @verbatim
2931	TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V *
2932	32-bit paged protected mode, CPUID : 33 270 ins/sec 33 154
2933	real mode, CPUID : 33 534 ins/sec 32 711
2934	[snip]
2935	32-bit paged protected mode, RDTSC : 102 216 011 ins/sec 98 225 419
2936	real mode, RDTSC : 102 492 243 ins/sec 98 225 419
2937	[snip]
2938	32-bit paged protected mode, Read CR4 : 2 096 165 ins/sec 2 123 815
2939	real mode, Read CR4 : 2 081 047 ins/sec 2 075 151
2940	[snip]
2941	32-bit paged protected mode, 32-bit IN : 32 739 ins/sec 33 655
2942	32-bit paged protected mode, 32-bit OUT : 32 702 ins/sec 33 777
2943	32-bit paged protected mode, 32-bit IN-to-ring-3 : 32 579 ins/sec 29 985
2944	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 32 750 ins/sec 29 757
2945	[snip]
2946	32-bit paged protected mode, 32-bit read : 20 042 ins/sec 21 489
2947	32-bit paged protected mode, 32-bit write : 20 036 ins/sec 21 493
2948	32-bit paged protected mode, 32-bit read-to-ring-3 : 19 985 ins/sec 19 143
2949	32-bit paged protected mode, 32-bit write-to-ring-3 : 19 972 ins/sec 19 595
2950
2951	* @endverbatim
2952	*
2953	* Suspects are security updates and/or microcode updates installed since then.
2954	* Given that the RDTSC and CR4 numbers are reasonably unchanges, it seems that
2955	* the Hyper-V core loop (in hvax64.exe) aren't affected. Our ring-0 runloop
2956	* is equally affected as the ring-3 based runloop, so it cannot be ring
2957	* switching as such (unless the ring-0 loop is borked and we didn't notice yet).
2958	*
2959	* The issue is probably in the thread / process switching area, could be
2960	* something special for hyper-V interrupt delivery or worker thread switching.
2961	*
2962	* Really wish this thread ping-pong going on in VID.SYS could be eliminated!
2963	*
2964	*
2965	* @subsubsection subsect_nem_win_benchmarks_bs2t1u2 17763: Bootsector2-test1
2966	*
2967	* Some preliminary numbers for build 17763 on the 3.4 GHz AMD 1950X, the second
2968	* column will improve we get time to have a look the register page.
2969	*
2970	* There is a 50% performance loss here compared to the June numbers with
2971	* build 17134. The RDTSC numbers hits that it isn't in the Hyper-V core
2972	* (hvax64.exe), but something on the NT side.
2973	*
2974	* Clearing bit 20 in nt!KiSpeculationFeatures speeds things up (i.e. changing
2975	* the dword from 0x00300065 to 0x00200065 in windbg). This is checked by
2976	* nt!KePrepareToDispatchVirtualProcessor, making it a no-op if the flag is
2977	* clear. winhvr!WinHvpVpDispatchLoop call that function before making
2978	* hypercall 0xc2, which presumably does the heavy VCpu lifting in hvcax64.exe.
2979	*
2980	* @verbatim
2981	TESTING... WinHv API Hypercalls + VID clr(bit-20) + WinHv API
2982	32-bit paged protected mode, CPUID : 54 145 ins/sec 51 436 130 076
2983	real mode, CPUID : 54 178 ins/sec 51 713 130 449
2984	[snip]
2985	32-bit paged protected mode, RDTSC : 98 927 639 ins/sec 100 254 552 100 549 882
2986	real mode, RDTSC : 99 601 206 ins/sec 100 886 699 100 470 957
2987	[snip]
2988	32-bit paged protected mode, 32-bit IN : 54 621 ins/sec 51 524 128 294
2989	32-bit paged protected mode, 32-bit OUT : 54 870 ins/sec 51 671 129 397
2990	32-bit paged protected mode, 32-bit IN-to-ring-3 : 54 624 ins/sec 43 964 127 874
2991	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 54 803 ins/sec 44 087 129 443
2992	[snip]
2993	32-bit paged protected mode, 32-bit read : 28 230 ins/sec 34 042 48 113
2994	32-bit paged protected mode, 32-bit write : 27 962 ins/sec 34 050 48 069
2995	32-bit paged protected mode, 32-bit read-to-ring-3 : 27 841 ins/sec 28 397 48 146
2996	32-bit paged protected mode, 32-bit write-to-ring-3 : 27 896 ins/sec 29 455 47 970
2997	* @endverbatim
2998	*
2999	*
3000	* @subsubsection subsect_nem_win_benchmarks_w2k 17134/2018-06-22: Windows 2000 Boot & Shutdown
3001	*
3002	* Timing the startup and automatic shutdown of a Windows 2000 SP4 guest serves
3003	* as a real world benchmark and example of why exit performance is import. When
3004	* Windows 2000 boots up is doing a lot of VGA redrawing of the boot animation,
3005	* which is very costly. Not having installed guest additions leaves it in a VGA
3006	* mode after the bootup sequence is done, keep up the screen access expenses,
3007	* though the graphics driver more economical than the bootvid code.
3008	*
3009	* The VM was configured to automatically logon. A startup script was installed
3010	* to perform the automatic shuting down and powering off the VM (thru
3011	* vts_shutdown.exe -f -p). An offline snapshot of the VM was taken an restored
3012	* before each test run. The test time run time is calculated from the monotonic
3013	* VBox.log timestamps, starting with the state change to 'RUNNING' and stopping
3014	* at 'POWERING_OFF'.
3015	*
3016	* The host OS and VirtualBox build is the same as for the bootsector2-test1
3017	* scenario.
3018	*
3019	* Results:
3020	*
3021	* - WinHv API for all but physical page mappings:
3022	* 32 min 12.19 seconds
3023	*
3024	* - The default NEM/win configuration where we put the main execution loop
3025	* in ring-0, using hypercalls when we can and VID for managing execution:
3026	* 3 min 23.18 seconds
3027	*
3028	* - Regular VirtualBox using AMD-V directly, hyper-V is disabled, main
3029	* execution loop in ring-0:
3030	* 58.09 seconds
3031	*
3032	* - WinHv API with exit history based optimizations:
3033	* 58.66 seconds
3034	*
3035	* - Hypercall + VID.SYS with exit history base optimizations:
3036	* 58.94 seconds
3037	*
3038	* With a well above average machine needing over half an hour for booting a
3039	* nearly 20 year old guest kind of says it all. The 13%-20% exit performance
3040	* increase we get by using hypercalls and VID.SYS directly pays off a lot here.
3041	* The 3m23s is almost acceptable in comparison to the half an hour.
3042	*
3043	* The similarity between the last three results strongly hits at windows 2000
3044	* doing a lot of waiting during boot and shutdown and isn't the best testcase
3045	* once a basic performance level is reached.
3046	*
3047	*
3048	* @subsubsection subsection_iem_win_benchmarks_deb9_nat Debian 9 NAT performance
3049	*
3050	* This benchmark is about network performance over NAT from a 64-bit Debian 9
3051	* VM with a single CPU. For network performance measurements, we use our own
3052	* NetPerf tool (ValidationKit/utils/network/NetPerf.cpp) to measure latency
3053	* and throughput.
3054	*
3055	* The setups, builds and configurations are as in the previous benchmarks
3056	* (release r123172 on 1950X running 64-bit W10/17134 (2016-06-xx). Please note
3057	* that the exit optimizations hasn't yet been in tuned with NetPerf in mind.
3058	*
3059	* The NAT network setup was selected here since it's the default one and the
3060	* slowest one. There is quite a bit of IPC with worker threads and packet
3061	* processing involved.
3062	*
3063	* Latency test is first up. This is a classic back and forth between the two
3064	* NetPerf instances, where the key measurement is the roundrip latency. The
3065	* values here are the lowest result over 3-6 runs.
3066	*
3067	* Against host system:
3068	* - 152 258 ns/roundtrip - 100% - regular VirtualBox SVM
3069	* - 271 059 ns/roundtrip - 178% - Hypercalls + VID.SYS in ring-0 with exit optimizations.
3070	* - 280 149 ns/roundtrip - 184% - Hypercalls + VID.SYS in ring-0
3071	* - 317 735 ns/roundtrip - 209% - Win HV API with exit optimizations.
3072	* - 342 440 ns/roundtrip - 225% - Win HV API
3073	*
3074	* Against a remote Windows 10 system over a 10Gbps link:
3075	* - 243 969 ns/roundtrip - 100% - regular VirtualBox SVM
3076	* - 384 427 ns/roundtrip - 158% - Win HV API with exit optimizations.
3077	* - 402 411 ns/roundtrip - 165% - Hypercalls + VID.SYS in ring-0
3078	* - 406 313 ns/roundtrip - 167% - Win HV API
3079	* - 413 160 ns/roundtrip - 169% - Hypercalls + VID.SYS in ring-0 with exit optimizations.
3080	*
3081	* What we see here is:
3082	*
3083	* - Consistent and signficant latency increase using Hyper-V compared
3084	* to directly harnessing AMD-V ourselves.
3085	*
3086	* - When talking to the host, it's clear that the hypercalls + VID.SYS
3087	* in ring-0 method pays off.
3088	*
3089	* - When talking to a different host, the numbers are closer and it
3090	* is not longer clear which Hyper-V execution method is better.
3091	*
3092	*
3093	* Throughput benchmarks are performed by one side pushing data full throttle
3094	* for 10 seconds (minus a 1 second at each end of the test), then reversing
3095	* the roles and measuring it in the other direction. The tests ran 3-5 times
3096	* and below are the highest and lowest results in each direction.
3097	*
3098	* Receiving from host system:
3099	* - Regular VirtualBox SVM:
3100	* Max: 96 907 549 bytes/s - 100%
3101	* Min: 86 912 095 bytes/s - 100%
3102	* - Hypercalls + VID.SYS in ring-0:
3103	* Max: 84 036 544 bytes/s - 87%
3104	* Min: 64 978 112 bytes/s - 75%
3105	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
3106	* Max: 77 760 699 bytes/s - 80%
3107	* Min: 72 677 171 bytes/s - 84%
3108	* - Win HV API with exit optimizations:
3109	* Max: 64 465 905 bytes/s - 67%
3110	* Min: 62 286 369 bytes/s - 72%
3111	* - Win HV API:
3112	* Max: 62 466 631 bytes/s - 64%
3113	* Min: 61 362 782 bytes/s - 70%
3114	*
3115	* Sending to the host system:
3116	* - Regular VirtualBox SVM:
3117	* Max: 87 728 652 bytes/s - 100%
3118	* Min: 86 923 198 bytes/s - 100%
3119	* - Hypercalls + VID.SYS in ring-0:
3120	* Max: 84 280 749 bytes/s - 96%
3121	* Min: 78 369 842 bytes/s - 90%
3122	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
3123	* Max: 84 119 932 bytes/s - 96%
3124	* Min: 77 396 811 bytes/s - 89%
3125	* - Win HV API:
3126	* Max: 81 714 377 bytes/s - 93%
3127	* Min: 78 697 419 bytes/s - 91%
3128	* - Win HV API with exit optimizations:
3129	* Max: 80 502 488 bytes/s - 91%
3130	* Min: 71 164 978 bytes/s - 82%
3131	*
3132	* Receiving from a remote Windows 10 system over a 10Gbps link:
3133	* - Hypercalls + VID.SYS in ring-0:
3134	* Max: 115 346 922 bytes/s - 136%
3135	* Min: 112 912 035 bytes/s - 137%
3136	* - Regular VirtualBox SVM:
3137	* Max: 84 517 504 bytes/s - 100%
3138	* Min: 82 597 049 bytes/s - 100%
3139	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
3140	* Max: 77 736 251 bytes/s - 92%
3141	* Min: 73 813 784 bytes/s - 89%
3142	* - Win HV API with exit optimizations:
3143	* Max: 63 035 587 bytes/s - 75%
3144	* Min: 57 538 380 bytes/s - 70%
3145	* - Win HV API:
3146	* Max: 62 279 185 bytes/s - 74%
3147	* Min: 56 813 866 bytes/s - 69%
3148	*
3149	* Sending to a remote Windows 10 system over a 10Gbps link:
3150	* - Win HV API with exit optimizations:
3151	* Max: 116 502 357 bytes/s - 103%
3152	* Min: 49 046 550 bytes/s - 59%
3153	* - Regular VirtualBox SVM:
3154	* Max: 113 030 991 bytes/s - 100%
3155	* Min: 83 059 511 bytes/s - 100%
3156	* - Hypercalls + VID.SYS in ring-0:
3157	* Max: 106 435 031 bytes/s - 94%
3158	* Min: 47 253 510 bytes/s - 57%
3159	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
3160	* Max: 94 842 287 bytes/s - 84%
3161	* Min: 68 362 172 bytes/s - 82%
3162	* - Win HV API:
3163	* Max: 65 165 225 bytes/s - 58%
3164	* Min: 47 246 573 bytes/s - 57%
3165	*
3166	* What we see here is:
3167	*
3168	* - Again consistent numbers when talking to the host. Showing that the
3169	* ring-0 approach is preferable to the ring-3 one.
3170	*
3171	* - Again when talking to a remote host, things get more difficult to
3172	* make sense of. The spread is larger and direct AMD-V gets beaten by
3173	* a different the Hyper-V approaches in each direction.
3174	*
3175	* - However, if we treat the first entry (remote host) as weird spikes, the
3176	* other entries are consistently worse compared to direct AMD-V. For the
3177	* send case we get really bad results for WinHV.
3178	*
3179	*/
3180

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source: vbox/trunk/src/VBox/VMM/VMMR3/NEMR3Native-win.cpp@ 92341

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