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NEMR3Native-win.cpp

Last change on this file was 99370, checked in by vboxsync, 12 months ago
VMM/NEM-win: Disable MONITOR/MWAIT CPUID flag as it seems Hyper-V never implements MONITOR and only sometimes MWAIT. Reportely causes troubles for Solaris guests. Untested!
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 153.0 KB

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1	/* $Id: NEMR3Native-win.cpp 99370 2023-04-11 00:32:33Z 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) 2018-2023 Oracle and/or its affiliates.
14	*
15	* This file is part of VirtualBox base platform packages, as
16	* available from https://www.virtualbox.org.
17	*
18	* This program is free software; you can redistribute it and/or
19	* modify it under the terms of the GNU General Public License
20	* as published by the Free Software Foundation, in version 3 of the
21	* License.
22	*
23	* This program is distributed in the hope that it will be useful, but
24	* WITHOUT ANY WARRANTY; without even the implied warranty of
25	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26	* General Public License for more details.
27	*
28	* You should have received a copy of the GNU General Public License
29	* along with this program; if not, see <https://www.gnu.org/licenses>.
30	*
31	* SPDX-License-Identifier: GPL-3.0-only
32	*/
33
34
35	/*********************************************************************************************************************************
36	* Header Files *
37	*********************************************************************************************************************************/
38	#define LOG_GROUP LOG_GROUP_NEM
39	#define VMCPU_INCL_CPUM_GST_CTX
40	#include <iprt/nt/nt-and-windows.h>
41	#include <iprt/nt/hyperv.h>
42	#include <iprt/nt/vid.h>
43	#include <WinHvPlatform.h>
44
45	#ifndef _WIN32_WINNT_WIN10
46	# error "Missing _WIN32_WINNT_WIN10"
47	#endif
48	#ifndef _WIN32_WINNT_WIN10_RS1 /* Missing define, causing trouble for us. */
49	# define _WIN32_WINNT_WIN10_RS1 (_WIN32_WINNT_WIN10 + 1)
50	#endif
51	#include <sysinfoapi.h>
52	#include <debugapi.h>
53	#include <errhandlingapi.h>
54	#include <fileapi.h>
55	#include <winerror.h> /* no api header for this. */
56
57	#include <VBox/vmm/nem.h>
58	#include <VBox/vmm/iem.h>
59	#include <VBox/vmm/em.h>
60	#include <VBox/vmm/apic.h>
61	#include <VBox/vmm/pdm.h>
62	#include <VBox/vmm/dbgftrace.h>
63	#include "NEMInternal.h"
64	#include <VBox/vmm/vmcc.h>
65
66	#include <iprt/ldr.h>
67	#include <iprt/path.h>
68	#include <iprt/string.h>
69	#include <iprt/system.h>
70	#include <iprt/utf16.h>
71
72	#ifndef NTDDI_WIN10_VB /* Present in W10 2004 SDK, quite possibly earlier. */
73	HRESULT WINAPI WHvQueryGpaRangeDirtyBitmap(WHV_PARTITION_HANDLE, WHV_GUEST_PHYSICAL_ADDRESS, UINT64, UINT64 *, UINT32);
74	# define WHvMapGpaRangeFlagTrackDirtyPages ((WHV_MAP_GPA_RANGE_FLAGS)0x00000008)
75	#endif
76
77
78	/*********************************************************************************************************************************
79	* Defined Constants And Macros *
80	*********************************************************************************************************************************/
81	#ifdef LOG_ENABLED
82	# define NEM_WIN_INTERCEPT_NT_IO_CTLS
83	#endif
84
85	/** VID I/O control detection: Fake partition handle input. */
86	#define NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE ((HANDLE)(uintptr_t)38479125)
87	/** VID I/O control detection: Fake partition ID return. */
88	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID UINT64_C(0xfa1e000042424242)
89	/** VID I/O control detection: The property we get via VidGetPartitionProperty. */
90	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE HvPartitionPropertyProcessorVendor
91	/** VID I/O control detection: Fake property value return. */
92	#define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE UINT64_C(0xf00dface01020304)
93	/** VID I/O control detection: Fake CPU index input. */
94	#define NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX UINT32_C(42)
95	/** VID I/O control detection: Fake timeout input. */
96	#define NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT UINT32_C(0x00080286)
97
98
99	/*********************************************************************************************************************************
100	* Global Variables *
101	*********************************************************************************************************************************/
102	/** @name APIs imported from WinHvPlatform.dll
103	* @{ */
104	static decltype(WHvGetCapability) * g_pfnWHvGetCapability;
105	static decltype(WHvCreatePartition) * g_pfnWHvCreatePartition;
106	static decltype(WHvSetupPartition) * g_pfnWHvSetupPartition;
107	static decltype(WHvDeletePartition) * g_pfnWHvDeletePartition;
108	static decltype(WHvGetPartitionProperty) * g_pfnWHvGetPartitionProperty;
109	static decltype(WHvSetPartitionProperty) * g_pfnWHvSetPartitionProperty;
110	static decltype(WHvMapGpaRange) * g_pfnWHvMapGpaRange;
111	static decltype(WHvUnmapGpaRange) * g_pfnWHvUnmapGpaRange;
112	static decltype(WHvTranslateGva) * g_pfnWHvTranslateGva;
113	static decltype(WHvQueryGpaRangeDirtyBitmap) * g_pfnWHvQueryGpaRangeDirtyBitmap;
114	static decltype(WHvCreateVirtualProcessor) * g_pfnWHvCreateVirtualProcessor;
115	static decltype(WHvDeleteVirtualProcessor) * g_pfnWHvDeleteVirtualProcessor;
116	static decltype(WHvRunVirtualProcessor) * g_pfnWHvRunVirtualProcessor;
117	static decltype(WHvCancelRunVirtualProcessor) * g_pfnWHvCancelRunVirtualProcessor;
118	static decltype(WHvGetVirtualProcessorRegisters) * g_pfnWHvGetVirtualProcessorRegisters;
119	static decltype(WHvSetVirtualProcessorRegisters) * g_pfnWHvSetVirtualProcessorRegisters;
120	/** @} */
121
122	/** @name APIs imported from Vid.dll
123	* @{ */
124	static decltype(VidGetHvPartitionId) *g_pfnVidGetHvPartitionId;
125	static decltype(VidGetPartitionProperty) *g_pfnVidGetPartitionProperty;
126	#ifdef LOG_ENABLED
127	static decltype(VidStartVirtualProcessor) *g_pfnVidStartVirtualProcessor;
128	static decltype(VidStopVirtualProcessor) *g_pfnVidStopVirtualProcessor;
129	static decltype(VidMessageSlotMap) *g_pfnVidMessageSlotMap;
130	static decltype(VidMessageSlotHandleAndGetNext) *g_pfnVidMessageSlotHandleAndGetNext;
131	static decltype(VidGetVirtualProcessorState) *g_pfnVidGetVirtualProcessorState;
132	static decltype(VidSetVirtualProcessorState) *g_pfnVidSetVirtualProcessorState;
133	static decltype(VidGetVirtualProcessorRunningStatus) *g_pfnVidGetVirtualProcessorRunningStatus;
134	#endif
135	/** @} */
136
137	/** The Windows build number. */
138	static uint32_t g_uBuildNo = 17134;
139
140
141
142	/**
143	* Import instructions.
144	*/
145	static const struct
146	{
147	uint8_t idxDll; /*< 0 for WinHvPlatform.dll, 1 for vid.dll. /
148	bool fOptional; /*< Set if import is optional. /
149	PFNRT ppfn; /< The function pointer variable. /
150	const char pszName; /< The function name. /
151	} g_aImports[] =
152	{
153	#define NEM_WIN_IMPORT(a_idxDll, a_fOptional, a_Name) { (a_idxDll), (a_fOptional), (PFNRT *)&RT_CONCAT(g_pfn,a_Name), #a_Name }
154	NEM_WIN_IMPORT(0, false, WHvGetCapability),
155	NEM_WIN_IMPORT(0, false, WHvCreatePartition),
156	NEM_WIN_IMPORT(0, false, WHvSetupPartition),
157	NEM_WIN_IMPORT(0, false, WHvDeletePartition),
158	NEM_WIN_IMPORT(0, false, WHvGetPartitionProperty),
159	NEM_WIN_IMPORT(0, false, WHvSetPartitionProperty),
160	NEM_WIN_IMPORT(0, false, WHvMapGpaRange),
161	NEM_WIN_IMPORT(0, false, WHvUnmapGpaRange),
162	NEM_WIN_IMPORT(0, false, WHvTranslateGva),
163	NEM_WIN_IMPORT(0, true, WHvQueryGpaRangeDirtyBitmap),
164	NEM_WIN_IMPORT(0, false, WHvCreateVirtualProcessor),
165	NEM_WIN_IMPORT(0, false, WHvDeleteVirtualProcessor),
166	NEM_WIN_IMPORT(0, false, WHvRunVirtualProcessor),
167	NEM_WIN_IMPORT(0, false, WHvCancelRunVirtualProcessor),
168	NEM_WIN_IMPORT(0, false, WHvGetVirtualProcessorRegisters),
169	NEM_WIN_IMPORT(0, false, WHvSetVirtualProcessorRegisters),
170
171	NEM_WIN_IMPORT(1, true, VidGetHvPartitionId),
172	NEM_WIN_IMPORT(1, true, VidGetPartitionProperty),
173	#ifdef LOG_ENABLED
174	NEM_WIN_IMPORT(1, false, VidMessageSlotMap),
175	NEM_WIN_IMPORT(1, false, VidMessageSlotHandleAndGetNext),
176	NEM_WIN_IMPORT(1, false, VidStartVirtualProcessor),
177	NEM_WIN_IMPORT(1, false, VidStopVirtualProcessor),
178	NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorState),
179	NEM_WIN_IMPORT(1, false, VidSetVirtualProcessorState),
180	NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorRunningStatus),
181	#endif
182	#undef NEM_WIN_IMPORT
183	};
184
185
186	/** The real NtDeviceIoControlFile API in NTDLL. */
187	static decltype(NtDeviceIoControlFile) *g_pfnNtDeviceIoControlFile;
188	/** Pointer to the NtDeviceIoControlFile import table entry. */
189	static decltype(NtDeviceIoControlFile) **g_ppfnVidNtDeviceIoControlFile;
190	#ifdef LOG_ENABLED
191	/** Info about the VidGetHvPartitionId I/O control interface. */
192	static NEMWINIOCTL g_IoCtlGetHvPartitionId;
193	/** Info about the VidGetPartitionProperty I/O control interface. */
194	static NEMWINIOCTL g_IoCtlGetPartitionProperty;
195	/** Info about the VidStartVirtualProcessor I/O control interface. */
196	static NEMWINIOCTL g_IoCtlStartVirtualProcessor;
197	/** Info about the VidStopVirtualProcessor I/O control interface. */
198	static NEMWINIOCTL g_IoCtlStopVirtualProcessor;
199	/** Info about the VidMessageSlotHandleAndGetNext I/O control interface. */
200	static NEMWINIOCTL g_IoCtlMessageSlotHandleAndGetNext;
201	/** Info about the VidMessageSlotMap I/O control interface - for logging. */
202	static NEMWINIOCTL g_IoCtlMessageSlotMap;
203	/** Info about the VidGetVirtualProcessorState I/O control interface - for logging. */
204	static NEMWINIOCTL g_IoCtlGetVirtualProcessorState;
205	/** Info about the VidSetVirtualProcessorState I/O control interface - for logging. */
206	static NEMWINIOCTL g_IoCtlSetVirtualProcessorState;
207	/** Pointer to what nemR3WinIoctlDetector_ForLogging should fill in. */
208	static NEMWINIOCTL *g_pIoCtlDetectForLogging;
209	#endif
210
211	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
212	/** Mapping slot for CPU #0.
213	* @{ */
214	static VID_MESSAGE_MAPPING_HEADER *g_pMsgSlotMapping = NULL;
215	static const HV_MESSAGE_HEADER *g_pHvMsgHdr;
216	static const HV_X64_INTERCEPT_MESSAGE_HEADER *g_pX64MsgHdr;
217	/** @} */
218	#endif
219
220
221	/*
222	* Let the preprocessor alias the APIs to import variables for better autocompletion.
223	*/
224	#ifndef IN_SLICKEDIT
225	# define WHvGetCapability g_pfnWHvGetCapability
226	# define WHvCreatePartition g_pfnWHvCreatePartition
227	# define WHvSetupPartition g_pfnWHvSetupPartition
228	# define WHvDeletePartition g_pfnWHvDeletePartition
229	# define WHvGetPartitionProperty g_pfnWHvGetPartitionProperty
230	# define WHvSetPartitionProperty g_pfnWHvSetPartitionProperty
231	# define WHvMapGpaRange g_pfnWHvMapGpaRange
232	# define WHvUnmapGpaRange g_pfnWHvUnmapGpaRange
233	# define WHvTranslateGva g_pfnWHvTranslateGva
234	# define WHvQueryGpaRangeDirtyBitmap g_pfnWHvQueryGpaRangeDirtyBitmap
235	# define WHvCreateVirtualProcessor g_pfnWHvCreateVirtualProcessor
236	# define WHvDeleteVirtualProcessor g_pfnWHvDeleteVirtualProcessor
237	# define WHvRunVirtualProcessor g_pfnWHvRunVirtualProcessor
238	# define WHvGetRunExitContextSize g_pfnWHvGetRunExitContextSize
239	# define WHvCancelRunVirtualProcessor g_pfnWHvCancelRunVirtualProcessor
240	# define WHvGetVirtualProcessorRegisters g_pfnWHvGetVirtualProcessorRegisters
241	# define WHvSetVirtualProcessorRegisters g_pfnWHvSetVirtualProcessorRegisters
242
243	# define VidMessageSlotHandleAndGetNext g_pfnVidMessageSlotHandleAndGetNext
244	# define VidStartVirtualProcessor g_pfnVidStartVirtualProcessor
245	# define VidStopVirtualProcessor g_pfnVidStopVirtualProcessor
246
247	#endif
248
249	/** WHV_MEMORY_ACCESS_TYPE names */
250	static const char * const g_apszWHvMemAccesstypes[4] = { "read", "write", "exec", "!undefined!" };
251
252
253	/*********************************************************************************************************************************
254	* Internal Functions *
255	*********************************************************************************************************************************/
256	DECLINLINE(int) nemR3NativeGCPhys2R3PtrReadOnly(PVM pVM, RTGCPHYS GCPhys, const void **ppv);
257	DECLINLINE(int) nemR3NativeGCPhys2R3PtrWriteable(PVM pVM, RTGCPHYS GCPhys, void **ppv);
258
259	/*
260	* Instantate the code we used to share with ring-0.
261	*/
262	#include "../VMMAll/NEMAllNativeTemplate-win.cpp.h"
263
264
265
266	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
267	/**
268	* Wrapper that logs the call from VID.DLL.
269	*
270	* This is very handy for figuring out why an API call fails.
271	*/
272	static NTSTATUS WINAPI
273	nemR3WinLogWrapper_NtDeviceIoControlFile(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
274	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
275	PVOID pvOutput, ULONG cbOutput)
276	{
277
278	char szFunction[32];
279	const char *pszFunction;
280	if (uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction)
281	pszFunction = "VidMessageSlotHandleAndGetNext";
282	else if (uFunction == g_IoCtlStartVirtualProcessor.uFunction)
283	pszFunction = "VidStartVirtualProcessor";
284	else if (uFunction == g_IoCtlStopVirtualProcessor.uFunction)
285	pszFunction = "VidStopVirtualProcessor";
286	else if (uFunction == g_IoCtlMessageSlotMap.uFunction)
287	pszFunction = "VidMessageSlotMap";
288	else if (uFunction == g_IoCtlGetVirtualProcessorState.uFunction)
289	pszFunction = "VidGetVirtualProcessorState";
290	else if (uFunction == g_IoCtlSetVirtualProcessorState.uFunction)
291	pszFunction = "VidSetVirtualProcessorState";
292	else
293	{
294	RTStrPrintf(szFunction, sizeof(szFunction), "%#x", uFunction);
295	pszFunction = szFunction;
296	}
297
298	if (cbInput > 0 && pvInput)
299	Log12(("VID!NtDeviceIoControlFile: %s/input: %.*Rhxs\n", pszFunction, RT_MIN(cbInput, 32), pvInput));
300	NTSTATUS rcNt = g_pfnNtDeviceIoControlFile(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, uFunction,
301	pvInput, cbInput, pvOutput, cbOutput);
302	if (!hEvt && !pfnApcCallback && !pvApcCtx)
303	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",
304	hFile, pIos, pIos->Status, pIos->Information, pszFunction, pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress()));
305	else
306	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",
307	hFile, hEvt, RT_CB_LOG_CAST(pfnApcCallback), pvApcCtx, pIos, pIos->Status, pIos->Information, pszFunction,
308	pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress()));
309	if (cbOutput > 0 && pvOutput)
310	{
311	Log12(("VID!NtDeviceIoControlFile: %s/output: %.*Rhxs\n", pszFunction, RT_MIN(cbOutput, 32), pvOutput));
312	if (uFunction == 0x2210cc && g_pMsgSlotMapping == NULL && cbOutput >= sizeof(void *))
313	{
314	g_pMsgSlotMapping = (VID_MESSAGE_MAPPING_HEADER *)pvOutput;
315	g_pHvMsgHdr = (const HV_MESSAGE_HEADER *)(g_pMsgSlotMapping + 1);
316	g_pX64MsgHdr = (const HV_X64_INTERCEPT_MESSAGE_HEADER *)(g_pHvMsgHdr + 1);
317	Log12(("VID!NtDeviceIoControlFile: Message slot mapping: %p\n", g_pMsgSlotMapping));
318	}
319	}
320	if ( g_pMsgSlotMapping
321	&& ( uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction
322	\|\| uFunction == g_IoCtlStopVirtualProcessor.uFunction
323	\|\| uFunction == g_IoCtlMessageSlotMap.uFunction
324	))
325	Log12(("VID!NtDeviceIoControlFile: enmVidMsgType=%#x cb=%#x msg=%#x payload=%u cs:rip=%04x:%08RX64 (%s)\n",
326	g_pMsgSlotMapping->enmVidMsgType, g_pMsgSlotMapping->cbMessage,
327	g_pHvMsgHdr->MessageType, g_pHvMsgHdr->PayloadSize,
328	g_pX64MsgHdr->CsSegment.Selector, g_pX64MsgHdr->Rip, pszFunction));
329
330	return rcNt;
331	}
332	#endif /* NEM_WIN_INTERCEPT_NT_IO_CTLS */
333
334
335	/**
336	* Patches the call table of VID.DLL so we can intercept NtDeviceIoControlFile.
337	*
338	* This is for used to figure out the I/O control codes and in logging builds
339	* for logging API calls that WinHvPlatform.dll does.
340	*
341	* @returns VBox status code.
342	* @param hLdrModVid The VID module handle.
343	* @param pErrInfo Where to return additional error information.
344	*/
345	static int nemR3WinInitVidIntercepts(RTLDRMOD hLdrModVid, PRTERRINFO pErrInfo)
346	{
347	/*
348	* Locate the real API.
349	*/
350	g_pfnNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) *)RTLdrGetSystemSymbol("NTDLL.DLL", "NtDeviceIoControlFile");
351	AssertReturn(g_pfnNtDeviceIoControlFile != NULL,
352	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to resolve NtDeviceIoControlFile from NTDLL.DLL"));
353
354	/*
355	* Locate the PE header and get what we need from it.
356	*/
357	uint8_t const pbImage = (uint8_t const )RTLdrGetNativeHandle(hLdrModVid);
358	IMAGE_DOS_HEADER const pMzHdr = (IMAGE_DOS_HEADER const )pbImage;
359	AssertReturn(pMzHdr->e_magic == IMAGE_DOS_SIGNATURE,
360	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL mapping doesn't start with MZ signature: %#x", pMzHdr->e_magic));
361	IMAGE_NT_HEADERS const pNtHdrs = (IMAGE_NT_HEADERS const )&pbImage[pMzHdr->e_lfanew];
362	AssertReturn(pNtHdrs->Signature == IMAGE_NT_SIGNATURE,
363	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL has invalid PE signaturre: %#x @%#x",
364	pNtHdrs->Signature, pMzHdr->e_lfanew));
365
366	uint32_t const cbImage = pNtHdrs->OptionalHeader.SizeOfImage;
367	IMAGE_DATA_DIRECTORY const ImportDir = pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
368
369	/*
370	* Walk the import descriptor table looking for NTDLL.DLL.
371	*/
372	AssertReturn( ImportDir.Size > 0
373	&& ImportDir.Size < cbImage,
374	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory size: %#x", ImportDir.Size));
375	AssertReturn( ImportDir.VirtualAddress > 0
376	&& ImportDir.VirtualAddress <= cbImage - ImportDir.Size,
377	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory RVA: %#x", ImportDir.VirtualAddress));
378
379	for (PIMAGE_IMPORT_DESCRIPTOR pImps = (PIMAGE_IMPORT_DESCRIPTOR)&pbImage[ImportDir.VirtualAddress];
380	pImps->Name != 0 && pImps->FirstThunk != 0;
381	pImps++)
382	{
383	AssertReturn(pImps->Name < cbImage,
384	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory entry name: %#x", pImps->Name));
385	const char pszModName = (const char )&pbImage[pImps->Name];
386	if (RTStrICmpAscii(pszModName, "ntdll.dll"))
387	continue;
388	AssertReturn(pImps->FirstThunk < cbImage,
389	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk));
390	AssertReturn(pImps->OriginalFirstThunk < cbImage,
391	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk));
392
393	/*
394	* Walk the thunks table(s) looking for NtDeviceIoControlFile.
395	*/
396	uintptr_t puFirstThunk = (uintptr_t )&pbImage[pImps->FirstThunk]; /* update this. */
397	if ( pImps->OriginalFirstThunk != 0
398	&& pImps->OriginalFirstThunk != pImps->FirstThunk)
399	{
400	uintptr_t const puOrgThunk = (uintptr_t const )&pbImage[pImps->OriginalFirstThunk]; /* read from this. */
401	uintptr_t cLeft = (cbImage - (RT_MAX(pImps->FirstThunk, pImps->OriginalFirstThunk)))
402	/ sizeof(*puFirstThunk);
403	while (cLeft-- > 0 && *puOrgThunk != 0)
404	{
405	if (!(puOrgThunk & IMAGE_ORDINAL_FLAG64)) / ASSUMES 64-bit */
406	{
407	AssertReturn(puOrgThunk > 0 && puOrgThunk < cbImage,
408	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad thunk entry: %#x", *puOrgThunk));
409
410	const char pszSymbol = (const char )&pbImage[*puOrgThunk + 2];
411	if (strcmp(pszSymbol, "NtDeviceIoControlFile") == 0)
412	g_ppfnVidNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) **)puFirstThunk;
413	}
414
415	puOrgThunk++;
416	puFirstThunk++;
417	}
418	}
419	else
420	{
421	/* No original thunk table, so scan the resolved symbols for a match
422	with the NtDeviceIoControlFile address. */
423	uintptr_t const uNeedle = (uintptr_t)g_pfnNtDeviceIoControlFile;
424	uintptr_t cLeft = (cbImage - pImps->FirstThunk) / sizeof(*puFirstThunk);
425	while (cLeft-- > 0 && *puFirstThunk != 0)
426	{
427	if (*puFirstThunk == uNeedle)
428	g_ppfnVidNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) **)puFirstThunk;
429	puFirstThunk++;
430	}
431	}
432	}
433
434	if (g_ppfnVidNtDeviceIoControlFile != NULL)
435	{
436	/* Make the thunk writable we can freely modify it. */
437	DWORD fOldProt = PAGE_READONLY;
438	VirtualProtect((void *)(uintptr_t)g_ppfnVidNtDeviceIoControlFile, sizeof(uintptr_t), PAGE_EXECUTE_READWRITE, &fOldProt);
439
440	#ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS
441	*g_ppfnVidNtDeviceIoControlFile = nemR3WinLogWrapper_NtDeviceIoControlFile;
442	#endif
443	return VINF_SUCCESS;
444	}
445	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to patch NtDeviceIoControlFile import in VID.DLL!");
446	}
447
448
449	/**
450	* Worker for nemR3NativeInit that probes and load the native API.
451	*
452	* @returns VBox status code.
453	* @param fForced Whether the HMForced flag is set and we should
454	* fail if we cannot initialize.
455	* @param pErrInfo Where to always return error info.
456	*/
457	static int nemR3WinInitProbeAndLoad(bool fForced, PRTERRINFO pErrInfo)
458	{
459	/*
460	* Check that the DLL files we need are present, but without loading them.
461	* We'd like to avoid loading them unnecessarily.
462	*/
463	WCHAR wszPath[MAX_PATH + 64];
464	UINT cwcPath = GetSystemDirectoryW(wszPath, MAX_PATH);
465	if (cwcPath >= MAX_PATH \|\| cwcPath < 2)
466	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "GetSystemDirectoryW failed (%#x / %u)", cwcPath, GetLastError());
467
468	if (wszPath[cwcPath - 1] != '\\' \|\| wszPath[cwcPath - 1] != '/')
469	wszPath[cwcPath++] = '\\';
470	RTUtf16CopyAscii(&wszPath[cwcPath], RT_ELEMENTS(wszPath) - cwcPath, "WinHvPlatform.dll");
471	if (GetFileAttributesW(wszPath) == INVALID_FILE_ATTRIBUTES)
472	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "The native API dll was not found (%ls)", wszPath);
473
474	/*
475	* Check that we're in a VM and that the hypervisor identifies itself as Hyper-V.
476	*/
477	if (!ASMHasCpuId())
478	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID support");
479	if (!RTX86IsValidStdRange(ASMCpuId_EAX(0)))
480	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID leaf #1");
481	if (!(ASMCpuId_ECX(1) & X86_CPUID_FEATURE_ECX_HVP))
482	return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Not in a hypervisor partition (HVP=0)");
483
484	uint32_t cMaxHyperLeaf = 0;
485	uint32_t uEbx = 0;
486	uint32_t uEcx = 0;
487	uint32_t uEdx = 0;
488	ASMCpuIdExSlow(0x40000000, 0, 0, 0, &cMaxHyperLeaf, &uEbx, &uEcx, &uEdx);
489	if (!RTX86IsValidHypervisorRange(cMaxHyperLeaf))
490	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Invalid hypervisor CPUID range (%#x %#x %#x %#x)",
491	cMaxHyperLeaf, uEbx, uEcx, uEdx);
492	if ( uEbx != UINT32_C(0x7263694d) /* Micr */
493	\|\| uEcx != UINT32_C(0x666f736f) /* osof */
494	\|\| uEdx != UINT32_C(0x76482074) /* t Hv */)
495	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE,
496	"Not Hyper-V CPUID signature: %#x %#x %#x (expected %#x %#x %#x)",
497	uEbx, uEcx, uEdx, UINT32_C(0x7263694d), UINT32_C(0x666f736f), UINT32_C(0x76482074));
498	if (cMaxHyperLeaf < UINT32_C(0x40000005))
499	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Too narrow hypervisor CPUID range (%#x)", cMaxHyperLeaf);
500
501	/** @todo would be great if we could recognize a root partition from the
502	* CPUID info, but I currently don't dare do that. */
503
504	/*
505	* Now try load the DLLs and resolve the APIs.
506	*/
507	static const char * const s_apszDllNames[2] = { "WinHvPlatform.dll", "vid.dll" };
508	RTLDRMOD ahMods[2] = { NIL_RTLDRMOD, NIL_RTLDRMOD };
509	int rc = VINF_SUCCESS;
510	for (unsigned i = 0; i < RT_ELEMENTS(s_apszDllNames); i++)
511	{
512	int rc2 = RTLdrLoadSystem(s_apszDllNames[i], true /fNoUnload/, &ahMods[i]);
513	if (RT_FAILURE(rc2))
514	{
515	if (!RTErrInfoIsSet(pErrInfo))
516	RTErrInfoSetF(pErrInfo, rc2, "Failed to load API DLL: %s: %Rrc", s_apszDllNames[i], rc2);
517	else
518	RTErrInfoAddF(pErrInfo, rc2, "; %s: %Rrc", s_apszDllNames[i], rc2);
519	ahMods[i] = NIL_RTLDRMOD;
520	rc = VERR_NEM_INIT_FAILED;
521	}
522	}
523	if (RT_SUCCESS(rc))
524	rc = nemR3WinInitVidIntercepts(ahMods[1], pErrInfo);
525	if (RT_SUCCESS(rc))
526	{
527	for (unsigned i = 0; i < RT_ELEMENTS(g_aImports); i++)
528	{
529	int rc2 = RTLdrGetSymbol(ahMods[g_aImports[i].idxDll], g_aImports[i].pszName, (void **)g_aImports[i].ppfn);
530	if (RT_SUCCESS(rc2))
531	{
532	if (g_aImports[i].fOptional)
533	LogRel(("NEM: info: Found optional import %s!%s.\n",
534	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName));
535	}
536	else
537	{
538	*g_aImports[i].ppfn = NULL;
539
540	LogRel(("NEM: %s: Failed to import %s!%s: %Rrc",
541	g_aImports[i].fOptional ? "info" : fForced ? "fatal" : "error",
542	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName, rc2));
543	if (!g_aImports[i].fOptional)
544	{
545	if (RTErrInfoIsSet(pErrInfo))
546	RTErrInfoAddF(pErrInfo, rc2, ", %s!%s",
547	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName);
548	else
549	rc = RTErrInfoSetF(pErrInfo, rc2, "Failed to import: %s!%s",
550	s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName);
551	Assert(RT_FAILURE(rc));
552	}
553	}
554	}
555	if (RT_SUCCESS(rc))
556	{
557	Assert(!RTErrInfoIsSet(pErrInfo));
558	}
559	}
560
561	for (unsigned i = 0; i < RT_ELEMENTS(ahMods); i++)
562	RTLdrClose(ahMods[i]);
563	return rc;
564	}
565
566
567	/**
568	* Wrapper for different WHvGetCapability signatures.
569	*/
570	DECLINLINE(HRESULT) WHvGetCapabilityWrapper(WHV_CAPABILITY_CODE enmCap, WHV_CAPABILITY *pOutput, uint32_t cbOutput)
571	{
572	return g_pfnWHvGetCapability(enmCap, pOutput, cbOutput, NULL);
573	}
574
575
576	/**
577	* Worker for nemR3NativeInit that gets the hypervisor capabilities.
578	*
579	* @returns VBox status code.
580	* @param pVM The cross context VM structure.
581	* @param pErrInfo Where to always return error info.
582	*/
583	static int nemR3WinInitCheckCapabilities(PVM pVM, PRTERRINFO pErrInfo)
584	{
585	#define NEM_LOG_REL_CAP_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %-38s= " a_szFmt "\n", a_szField, a_Value))
586	#define NEM_LOG_REL_CAP_SUB_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %36s: " a_szFmt "\n", a_szField, a_Value))
587	#define NEM_LOG_REL_CAP_SUB(a_szField, a_Value) NEM_LOG_REL_CAP_SUB_EX(a_szField, "%d", a_Value)
588
589	/*
590	* Is the hypervisor present with the desired capability?
591	*
592	* In build 17083 this translates into:
593	* - CPUID[0x00000001].HVP is set
594	* - CPUID[0x40000000] == "Microsoft Hv"
595	* - CPUID[0x40000001].eax == "Hv#1"
596	* - CPUID[0x40000003].ebx[12] is set.
597	* - VidGetExoPartitionProperty(INVALID_HANDLE_VALUE, 0x60000, &Ignored) returns
598	* a non-zero value.
599	*/
600	/**
601	* @todo Someone at Microsoft please explain weird API design:
602	* 1. Pointless CapabilityCode duplication int the output;
603	* 2. No output size.
604	*/
605	WHV_CAPABILITY Caps;
606	RT_ZERO(Caps);
607	SetLastError(0);
608	HRESULT hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeHypervisorPresent, &Caps, sizeof(Caps));
609	DWORD rcWin = GetLastError();
610	if (FAILED(hrc))
611	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
612	"WHvGetCapability/WHvCapabilityCodeHypervisorPresent failed: %Rhrc (Last=%#x/%u)",
613	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
614	if (!Caps.HypervisorPresent)
615	{
616	if (!RTPathExists(RTPATH_NT_PASSTHRU_PREFIX "Device\\VidExo"))
617	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE,
618	"WHvCapabilityCodeHypervisorPresent is FALSE! Make sure you have enabled the 'Windows Hypervisor Platform' feature.");
619	return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "WHvCapabilityCodeHypervisorPresent is FALSE! (%u)", rcWin);
620	}
621	LogRel(("NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...\n"));
622
623
624	/*
625	* Check what extended VM exits are supported.
626	*/
627	RT_ZERO(Caps);
628	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExtendedVmExits, &Caps, sizeof(Caps));
629	if (FAILED(hrc))
630	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
631	"WHvGetCapability/WHvCapabilityCodeExtendedVmExits failed: %Rhrc (Last=%#x/%u)",
632	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
633	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeExtendedVmExits", "%'#018RX64", Caps.ExtendedVmExits.AsUINT64);
634	pVM->nem.s.fExtendedMsrExit = RT_BOOL(Caps.ExtendedVmExits.X64MsrExit);
635	pVM->nem.s.fExtendedCpuIdExit = RT_BOOL(Caps.ExtendedVmExits.X64CpuidExit);
636	pVM->nem.s.fExtendedXcptExit = RT_BOOL(Caps.ExtendedVmExits.ExceptionExit);
637	NEM_LOG_REL_CAP_SUB("fExtendedMsrExit", pVM->nem.s.fExtendedMsrExit);
638	NEM_LOG_REL_CAP_SUB("fExtendedCpuIdExit", pVM->nem.s.fExtendedCpuIdExit);
639	NEM_LOG_REL_CAP_SUB("fExtendedXcptExit", pVM->nem.s.fExtendedXcptExit);
640	if (Caps.ExtendedVmExits.AsUINT64 & ~(uint64_t)7)
641	LogRel(("NEM: Warning! Unknown VM exit definitions: %#RX64\n", Caps.ExtendedVmExits.AsUINT64));
642	/** @todo RECHECK: WHV_EXTENDED_VM_EXITS typedef. */
643
644	/*
645	* Check features in case they end up defining any.
646	*/
647	RT_ZERO(Caps);
648	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeFeatures, &Caps, sizeof(Caps));
649	if (FAILED(hrc))
650	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
651	"WHvGetCapability/WHvCapabilityCodeFeatures failed: %Rhrc (Last=%#x/%u)",
652	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
653	if (Caps.Features.AsUINT64 & ~(uint64_t)0)
654	LogRel(("NEM: Warning! Unknown feature definitions: %#RX64\n", Caps.Features.AsUINT64));
655	/** @todo RECHECK: WHV_CAPABILITY_FEATURES typedef. */
656
657	/*
658	* Check supported exception exit bitmap bits.
659	* We don't currently require this, so we just log failure.
660	*/
661	RT_ZERO(Caps);
662	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExceptionExitBitmap, &Caps, sizeof(Caps));
663	if (SUCCEEDED(hrc))
664	LogRel(("NEM: Supported exception exit bitmap: %#RX64\n", Caps.ExceptionExitBitmap));
665	else
666	LogRel(("NEM: Warning! WHvGetCapability/WHvCapabilityCodeExceptionExitBitmap failed: %Rhrc (Last=%#x/%u)",
667	hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
668
669	/*
670	* Check that the CPU vendor is supported.
671	*/
672	RT_ZERO(Caps);
673	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorVendor, &Caps, sizeof(Caps));
674	if (FAILED(hrc))
675	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
676	"WHvGetCapability/WHvCapabilityCodeProcessorVendor failed: %Rhrc (Last=%#x/%u)",
677	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
678	switch (Caps.ProcessorVendor)
679	{
680	/** @todo RECHECK: WHV_PROCESSOR_VENDOR typedef. */
681	case WHvProcessorVendorIntel:
682	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - Intel", Caps.ProcessorVendor);
683	pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_INTEL;
684	break;
685	case WHvProcessorVendorAmd:
686	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - AMD", Caps.ProcessorVendor);
687	pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_AMD;
688	break;
689	default:
690	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d", Caps.ProcessorVendor);
691	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unknown processor vendor: %d", Caps.ProcessorVendor);
692	}
693
694	/*
695	* CPU features, guessing these are virtual CPU features?
696	*/
697	RT_ZERO(Caps);
698	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorFeatures, &Caps, sizeof(Caps));
699	if (FAILED(hrc))
700	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
701	"WHvGetCapability/WHvCapabilityCodeProcessorFeatures failed: %Rhrc (Last=%#x/%u)",
702	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
703	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorFeatures", "%'#018RX64", Caps.ProcessorFeatures.AsUINT64);
704	#define NEM_LOG_REL_CPU_FEATURE(a_Field) NEM_LOG_REL_CAP_SUB(#a_Field, Caps.ProcessorFeatures.a_Field)
705	NEM_LOG_REL_CPU_FEATURE(Sse3Support);
706	NEM_LOG_REL_CPU_FEATURE(LahfSahfSupport);
707	NEM_LOG_REL_CPU_FEATURE(Ssse3Support);
708	NEM_LOG_REL_CPU_FEATURE(Sse4_1Support);
709	NEM_LOG_REL_CPU_FEATURE(Sse4_2Support);
710	NEM_LOG_REL_CPU_FEATURE(Sse4aSupport);
711	NEM_LOG_REL_CPU_FEATURE(XopSupport);
712	NEM_LOG_REL_CPU_FEATURE(PopCntSupport);
713	NEM_LOG_REL_CPU_FEATURE(Cmpxchg16bSupport);
714	NEM_LOG_REL_CPU_FEATURE(Altmovcr8Support);
715	NEM_LOG_REL_CPU_FEATURE(LzcntSupport);
716	NEM_LOG_REL_CPU_FEATURE(MisAlignSseSupport);
717	NEM_LOG_REL_CPU_FEATURE(MmxExtSupport);
718	NEM_LOG_REL_CPU_FEATURE(Amd3DNowSupport);
719	NEM_LOG_REL_CPU_FEATURE(ExtendedAmd3DNowSupport);
720	NEM_LOG_REL_CPU_FEATURE(Page1GbSupport);
721	NEM_LOG_REL_CPU_FEATURE(AesSupport);
722	NEM_LOG_REL_CPU_FEATURE(PclmulqdqSupport);
723	NEM_LOG_REL_CPU_FEATURE(PcidSupport);
724	NEM_LOG_REL_CPU_FEATURE(Fma4Support);
725	NEM_LOG_REL_CPU_FEATURE(F16CSupport);
726	NEM_LOG_REL_CPU_FEATURE(RdRandSupport);
727	NEM_LOG_REL_CPU_FEATURE(RdWrFsGsSupport);
728	NEM_LOG_REL_CPU_FEATURE(SmepSupport);
729	NEM_LOG_REL_CPU_FEATURE(EnhancedFastStringSupport);
730	NEM_LOG_REL_CPU_FEATURE(Bmi1Support);
731	NEM_LOG_REL_CPU_FEATURE(Bmi2Support);
732	/* two reserved bits here, see below */
733	NEM_LOG_REL_CPU_FEATURE(MovbeSupport);
734	NEM_LOG_REL_CPU_FEATURE(Npiep1Support);
735	NEM_LOG_REL_CPU_FEATURE(DepX87FPUSaveSupport);
736	NEM_LOG_REL_CPU_FEATURE(RdSeedSupport);
737	NEM_LOG_REL_CPU_FEATURE(AdxSupport);
738	NEM_LOG_REL_CPU_FEATURE(IntelPrefetchSupport);
739	NEM_LOG_REL_CPU_FEATURE(SmapSupport);
740	NEM_LOG_REL_CPU_FEATURE(HleSupport);
741	NEM_LOG_REL_CPU_FEATURE(RtmSupport);
742	NEM_LOG_REL_CPU_FEATURE(RdtscpSupport);
743	NEM_LOG_REL_CPU_FEATURE(ClflushoptSupport);
744	NEM_LOG_REL_CPU_FEATURE(ClwbSupport);
745	NEM_LOG_REL_CPU_FEATURE(ShaSupport);
746	NEM_LOG_REL_CPU_FEATURE(X87PointersSavedSupport);
747	#undef NEM_LOG_REL_CPU_FEATURE
748	if (Caps.ProcessorFeatures.AsUINT64 & (~(RT_BIT_64(43) - 1) \| RT_BIT_64(27) \| RT_BIT_64(28)))
749	LogRel(("NEM: Warning! Unknown CPU features: %#RX64\n", Caps.ProcessorFeatures.AsUINT64));
750	pVM->nem.s.uCpuFeatures.u64 = Caps.ProcessorFeatures.AsUINT64;
751	/** @todo RECHECK: WHV_PROCESSOR_FEATURES typedef. */
752
753	/*
754	* The cache line flush size.
755	*/
756	RT_ZERO(Caps);
757	hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorClFlushSize, &Caps, sizeof(Caps));
758	if (FAILED(hrc))
759	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
760	"WHvGetCapability/WHvCapabilityCodeProcessorClFlushSize failed: %Rhrc (Last=%#x/%u)",
761	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
762	NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorClFlushSize", "2^%u", Caps.ProcessorClFlushSize);
763	if (Caps.ProcessorClFlushSize < 8 && Caps.ProcessorClFlushSize > 9)
764	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unsupported cache line flush size: %u", Caps.ProcessorClFlushSize);
765	pVM->nem.s.cCacheLineFlushShift = Caps.ProcessorClFlushSize;
766
767	/*
768	* See if they've added more properties that we're not aware of.
769	*/
770	/** @todo RECHECK: WHV_CAPABILITY_CODE typedef. */
771	if (!IsDebuggerPresent()) /* Too noisy when in debugger, so skip. */
772	{
773	static const struct
774	{
775	uint32_t iMin, iMax; } s_aUnknowns[] =
776	{
777	{ 0x0004, 0x000f },
778	{ 0x1003, 0x100f },
779	{ 0x2000, 0x200f },
780	{ 0x3000, 0x300f },
781	{ 0x4000, 0x400f },
782	};
783	for (uint32_t j = 0; j < RT_ELEMENTS(s_aUnknowns); j++)
784	for (uint32_t i = s_aUnknowns[j].iMin; i <= s_aUnknowns[j].iMax; i++)
785	{
786	RT_ZERO(Caps);
787	hrc = WHvGetCapabilityWrapper((WHV_CAPABILITY_CODE)i, &Caps, sizeof(Caps));
788	if (SUCCEEDED(hrc))
789	LogRel(("NEM: Warning! Unknown capability %#x returning: %.*Rhxs\n", i, sizeof(Caps), &Caps));
790	}
791	}
792
793	/*
794	* For proper operation, we require CPUID exits.
795	*/
796	if (!pVM->nem.s.fExtendedCpuIdExit)
797	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended CPUID exit support");
798	if (!pVM->nem.s.fExtendedMsrExit)
799	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended MSR exit support");
800	if (!pVM->nem.s.fExtendedXcptExit)
801	return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended exception exit support");
802
803	#undef NEM_LOG_REL_CAP_EX
804	#undef NEM_LOG_REL_CAP_SUB_EX
805	#undef NEM_LOG_REL_CAP_SUB
806	return VINF_SUCCESS;
807	}
808
809	#ifdef LOG_ENABLED
810
811	/**
812	* Used to fill in g_IoCtlGetHvPartitionId.
813	*/
814	static NTSTATUS WINAPI
815	nemR3WinIoctlDetector_GetHvPartitionId(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
816	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
817	PVOID pvOutput, ULONG cbOutput)
818	{
819	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
820	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
821	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
822	AssertLogRelMsgReturn(cbInput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
823	RT_NOREF(pvInput);
824
825	AssertLogRelMsgReturn(RT_VALID_PTR(pvOutput), ("pvOutput=%p\n", pvOutput), STATUS_INVALID_PARAMETER_9);
826	AssertLogRelMsgReturn(cbOutput == sizeof(HV_PARTITION_ID), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
827	(HV_PARTITION_ID )pvOutput = NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID;
828
829	g_IoCtlGetHvPartitionId.cbInput = cbInput;
830	g_IoCtlGetHvPartitionId.cbOutput = cbOutput;
831	g_IoCtlGetHvPartitionId.uFunction = uFunction;
832
833	return STATUS_SUCCESS;
834	}
835
836
837	/**
838	* Used to fill in g_IoCtlGetHvPartitionId.
839	*/
840	static NTSTATUS WINAPI
841	nemR3WinIoctlDetector_GetPartitionProperty(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
842	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
843	PVOID pvOutput, ULONG cbOutput)
844	{
845	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
846	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
847	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
848	AssertLogRelMsgReturn(cbInput == sizeof(VID_PARTITION_PROPERTY_CODE), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
849	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
850	AssertLogRelMsgReturn((VID_PARTITION_PROPERTY_CODE )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE,
851	("pvInput=%#x, expected %#x\n", (HV_PARTITION_PROPERTY_CODE *)pvInput,
852	NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE), STATUS_INVALID_PARAMETER_9);
853	AssertLogRelMsgReturn(RT_VALID_PTR(pvOutput), ("pvOutput=%p\n", pvOutput), STATUS_INVALID_PARAMETER_9);
854	AssertLogRelMsgReturn(cbOutput == sizeof(HV_PARTITION_PROPERTY), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
855	(HV_PARTITION_PROPERTY )pvOutput = NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE;
856
857	g_IoCtlGetPartitionProperty.cbInput = cbInput;
858	g_IoCtlGetPartitionProperty.cbOutput = cbOutput;
859	g_IoCtlGetPartitionProperty.uFunction = uFunction;
860
861	return STATUS_SUCCESS;
862	}
863
864
865	/**
866	* Used to fill in g_IoCtlStartVirtualProcessor.
867	*/
868	static NTSTATUS WINAPI
869	nemR3WinIoctlDetector_StartVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
870	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
871	PVOID pvOutput, ULONG cbOutput)
872	{
873	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
874	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
875	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
876	AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
877	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
878	AssertLogRelMsgReturn((HV_VP_INDEX )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
879	("piCpu=%u\n", (HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9);
880	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
881	RT_NOREF(pvOutput);
882
883	g_IoCtlStartVirtualProcessor.cbInput = cbInput;
884	g_IoCtlStartVirtualProcessor.cbOutput = cbOutput;
885	g_IoCtlStartVirtualProcessor.uFunction = uFunction;
886
887	return STATUS_SUCCESS;
888	}
889
890
891	/**
892	* Used to fill in g_IoCtlStartVirtualProcessor.
893	*/
894	static NTSTATUS WINAPI
895	nemR3WinIoctlDetector_StopVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
896	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
897	PVOID pvOutput, ULONG cbOutput)
898	{
899	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
900	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
901	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
902	AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8);
903	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
904	AssertLogRelMsgReturn((HV_VP_INDEX )pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
905	("piCpu=%u\n", (HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9);
906	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
907	RT_NOREF(pvOutput);
908
909	g_IoCtlStopVirtualProcessor.cbInput = cbInput;
910	g_IoCtlStopVirtualProcessor.cbOutput = cbOutput;
911	g_IoCtlStopVirtualProcessor.uFunction = uFunction;
912
913	return STATUS_SUCCESS;
914	}
915
916
917	/**
918	* Used to fill in g_IoCtlMessageSlotHandleAndGetNext
919	*/
920	static NTSTATUS WINAPI
921	nemR3WinIoctlDetector_MessageSlotHandleAndGetNext(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
922	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
923	PVOID pvOutput, ULONG cbOutput)
924	{
925	AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1);
926	RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx);
927	AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5);
928
929	if (g_uBuildNo >= 17758)
930	{
931	/* No timeout since about build 17758, it's now always an infinite wait. So, a somewhat compatible change. */
932	AssertLogRelMsgReturn(cbInput == RT_UOFFSETOF(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT, cMillies),
933	("cbInput=%#x\n", cbInput),
934	STATUS_INVALID_PARAMETER_8);
935	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
936	PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput;
937	AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX
938	&& pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE,
939	("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies),
940	STATUS_INVALID_PARAMETER_9);
941	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
942	}
943	else
944	{
945	AssertLogRelMsgReturn(cbInput == sizeof(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT), ("cbInput=%#x\n", cbInput),
946	STATUS_INVALID_PARAMETER_8);
947	AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9);
948	PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput;
949	AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX
950	&& pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE
951	&& pVidIn->cMillies == NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT,
952	("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies),
953	STATUS_INVALID_PARAMETER_9);
954	AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10);
955	RT_NOREF(pvOutput);
956	}
957
958	g_IoCtlMessageSlotHandleAndGetNext.cbInput = cbInput;
959	g_IoCtlMessageSlotHandleAndGetNext.cbOutput = cbOutput;
960	g_IoCtlMessageSlotHandleAndGetNext.uFunction = uFunction;
961
962	return STATUS_SUCCESS;
963	}
964
965	/**
966	* Used to fill in what g_pIoCtlDetectForLogging points to.
967	*/
968	static NTSTATUS WINAPI nemR3WinIoctlDetector_ForLogging(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx,
969	PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput,
970	PVOID pvOutput, ULONG cbOutput)
971	{
972	RT_NOREF(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, pvInput, pvOutput);
973
974	g_pIoCtlDetectForLogging->cbInput = cbInput;
975	g_pIoCtlDetectForLogging->cbOutput = cbOutput;
976	g_pIoCtlDetectForLogging->uFunction = uFunction;
977
978	return STATUS_SUCCESS;
979	}
980
981	#endif /* LOG_ENABLED */
982
983	/**
984	* Worker for nemR3NativeInit that detect I/O control function numbers for VID.
985	*
986	* We use the function numbers directly in ring-0 and to name functions when
987	* logging NtDeviceIoControlFile calls.
988	*
989	* @note We could alternatively do this by disassembling the respective
990	* functions, but hooking NtDeviceIoControlFile and making fake calls
991	* more easily provides the desired information.
992	*
993	* @returns VBox status code.
994	* @param pVM The cross context VM structure. Will set I/O
995	* control info members.
996	* @param pErrInfo Where to always return error info.
997	*/
998	static int nemR3WinInitDiscoverIoControlProperties(PVM pVM, PRTERRINFO pErrInfo)
999	{
1000	RT_NOREF(pVM, pErrInfo);
1001
1002	/*
1003	* Probe the I/O control information for select VID APIs so we can use
1004	* them directly from ring-0 and better log them.
1005	*
1006	*/
1007	#ifdef LOG_ENABLED
1008	decltype(NtDeviceIoControlFile) * const pfnOrg = *g_ppfnVidNtDeviceIoControlFile;
1009
1010	/* VidGetHvPartitionId - must work due to our memory management. */
1011	BOOL fRet;
1012	if (g_pfnVidGetHvPartitionId)
1013	{
1014	HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID;
1015	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_GetHvPartitionId;
1016	fRet = g_pfnVidGetHvPartitionId(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &idHvPartition);
1017	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1018	AssertReturn(fRet && idHvPartition == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID && g_IoCtlGetHvPartitionId.uFunction != 0,
1019	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
1020	"Problem figuring out VidGetHvPartitionId: fRet=%u idHvPartition=%#x dwErr=%u",
1021	fRet, idHvPartition, GetLastError()) );
1022	LogRel(("NEM: VidGetHvPartitionId -> fun:%#x in:%#x out:%#x\n",
1023	g_IoCtlGetHvPartitionId.uFunction, g_IoCtlGetHvPartitionId.cbInput, g_IoCtlGetHvPartitionId.cbOutput));
1024	}
1025
1026	/* VidGetPartitionProperty - must work as it's fallback for VidGetHvPartitionId. */
1027	if (g_ppfnVidNtDeviceIoControlFile)
1028	{
1029	HV_PARTITION_PROPERTY uPropValue = ~NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE;
1030	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_GetPartitionProperty;
1031	fRet = g_pfnVidGetPartitionProperty(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_CODE,
1032	&uPropValue);
1033	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1034	AssertReturn( fRet
1035	&& uPropValue == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_PROPERTY_VALUE
1036	&& g_IoCtlGetHvPartitionId.uFunction != 0,
1037	RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED,
1038	"Problem figuring out VidGetPartitionProperty: fRet=%u uPropValue=%#x dwErr=%u",
1039	fRet, uPropValue, GetLastError()) );
1040	LogRel(("NEM: VidGetPartitionProperty -> fun:%#x in:%#x out:%#x\n",
1041	g_IoCtlGetPartitionProperty.uFunction, g_IoCtlGetPartitionProperty.cbInput, g_IoCtlGetPartitionProperty.cbOutput));
1042	}
1043
1044	/* VidStartVirtualProcessor */
1045	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StartVirtualProcessor;
1046	fRet = g_pfnVidStartVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1047	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1048	AssertStmt(fRet && g_IoCtlStartVirtualProcessor.uFunction != 0,
1049	RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1050	"Problem figuring out VidStartVirtualProcessor: fRet=%u dwErr=%u", fRet, GetLastError()) );
1051	LogRel(("NEM: VidStartVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStartVirtualProcessor.uFunction,
1052	g_IoCtlStartVirtualProcessor.cbInput, g_IoCtlStartVirtualProcessor.cbOutput));
1053
1054	/* VidStopVirtualProcessor */
1055	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StopVirtualProcessor;
1056	fRet = g_pfnVidStopVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1057	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1058	AssertStmt(fRet && g_IoCtlStopVirtualProcessor.uFunction != 0,
1059	RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1060	"Problem figuring out VidStopVirtualProcessor: fRet=%u dwErr=%u", fRet, GetLastError()) );
1061	LogRel(("NEM: VidStopVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStopVirtualProcessor.uFunction,
1062	g_IoCtlStopVirtualProcessor.cbInput, g_IoCtlStopVirtualProcessor.cbOutput));
1063
1064	/* VidMessageSlotHandleAndGetNext */
1065	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_MessageSlotHandleAndGetNext;
1066	fRet = g_pfnVidMessageSlotHandleAndGetNext(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE,
1067	NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, VID_MSHAGN_F_HANDLE_MESSAGE,
1068	NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT);
1069	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1070	AssertStmt(fRet && g_IoCtlMessageSlotHandleAndGetNext.uFunction != 0,
1071	RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY,
1072	"Problem figuring out VidMessageSlotHandleAndGetNext: fRet=%u dwErr=%u",
1073	fRet, GetLastError()) );
1074	LogRel(("NEM: VidMessageSlotHandleAndGetNext -> fun:%#x in:%#x out:%#x\n",
1075	g_IoCtlMessageSlotHandleAndGetNext.uFunction, g_IoCtlMessageSlotHandleAndGetNext.cbInput,
1076	g_IoCtlMessageSlotHandleAndGetNext.cbOutput));
1077
1078	/* The following are only for logging: */
1079	union
1080	{
1081	VID_MAPPED_MESSAGE_SLOT MapSlot;
1082	HV_REGISTER_NAME Name;
1083	HV_REGISTER_VALUE Value;
1084	} uBuf;
1085
1086	/* VidMessageSlotMap */
1087	g_pIoCtlDetectForLogging = &g_IoCtlMessageSlotMap;
1088	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1089	fRet = g_pfnVidMessageSlotMap(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &uBuf.MapSlot, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX);
1090	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1091	Assert(fRet);
1092	LogRel(("NEM: VidMessageSlotMap -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1093	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1094
1095	/* VidGetVirtualProcessorState */
1096	uBuf.Name = HvRegisterExplicitSuspend;
1097	g_pIoCtlDetectForLogging = &g_IoCtlGetVirtualProcessorState;
1098	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1099	fRet = g_pfnVidGetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
1100	&uBuf.Name, 1, &uBuf.Value);
1101	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1102	Assert(fRet);
1103	LogRel(("NEM: VidGetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1104	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1105
1106	/* VidSetVirtualProcessorState */
1107	uBuf.Name = HvRegisterExplicitSuspend;
1108	g_pIoCtlDetectForLogging = &g_IoCtlSetVirtualProcessorState;
1109	*g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging;
1110	fRet = g_pfnVidSetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX,
1111	&uBuf.Name, 1, &uBuf.Value);
1112	*g_ppfnVidNtDeviceIoControlFile = pfnOrg;
1113	Assert(fRet);
1114	LogRel(("NEM: VidSetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction,
1115	g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput));
1116
1117	g_pIoCtlDetectForLogging = NULL;
1118	#endif /* LOG_ENABLED */
1119
1120	return VINF_SUCCESS;
1121	}
1122
1123
1124	/**
1125	* Creates and sets up a Hyper-V (exo) partition.
1126	*
1127	* @returns VBox status code.
1128	* @param pVM The cross context VM structure.
1129	* @param pErrInfo Where to always return error info.
1130	*/
1131	static int nemR3WinInitCreatePartition(PVM pVM, PRTERRINFO pErrInfo)
1132	{
1133	AssertReturn(!pVM->nem.s.hPartition, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order"));
1134	AssertReturn(!pVM->nem.s.hPartitionDevice, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order"));
1135
1136	/*
1137	* Create the partition.
1138	*/
1139	WHV_PARTITION_HANDLE hPartition;
1140	HRESULT hrc = WHvCreatePartition(&hPartition);
1141	if (FAILED(hrc))
1142	return RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED, "WHvCreatePartition failed with %Rhrc (Last=%#x/%u)",
1143	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1144
1145	int rc;
1146
1147	/*
1148	* Set partition properties, most importantly the CPU count.
1149	*/
1150	/**
1151	* @todo Someone at Microsoft please explain another weird API:
1152	* - Why this API doesn't take the WHV_PARTITION_PROPERTY_CODE value as an
1153	* argument rather than as part of the struct. That is so weird if you've
1154	* used any other NT or windows API, including WHvGetCapability().
1155	* - Why use PVOID when WHV_PARTITION_PROPERTY is what's expected. We
1156	* technically only need 9 bytes for setting/getting
1157	* WHVPartitionPropertyCodeProcessorClFlushSize, but the API insists on 16. */
1158	WHV_PARTITION_PROPERTY Property;
1159	RT_ZERO(Property);
1160	Property.ProcessorCount = pVM->cCpus;
1161	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorCount, &Property, sizeof(Property));
1162	if (SUCCEEDED(hrc))
1163	{
1164	RT_ZERO(Property);
1165	Property.ExtendedVmExits.X64CpuidExit = pVM->nem.s.fExtendedCpuIdExit; /** @todo Register fixed results and restrict cpuid exits */
1166	Property.ExtendedVmExits.X64MsrExit = pVM->nem.s.fExtendedMsrExit;
1167	Property.ExtendedVmExits.ExceptionExit = pVM->nem.s.fExtendedXcptExit;
1168	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExtendedVmExits, &Property, sizeof(Property));
1169	if (SUCCEEDED(hrc))
1170	{
1171	/*
1172	* We'll continue setup in nemR3NativeInitAfterCPUM.
1173	*/
1174	pVM->nem.s.fCreatedEmts = false;
1175	pVM->nem.s.hPartition = hPartition;
1176	LogRel(("NEM: Created partition %p.\n", hPartition));
1177	return VINF_SUCCESS;
1178	}
1179
1180	rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED,
1181	"Failed setting WHvPartitionPropertyCodeExtendedVmExits to %'#RX64: %Rhrc",
1182	Property.ExtendedVmExits.AsUINT64, hrc);
1183	}
1184	else
1185	rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED,
1186	"Failed setting WHvPartitionPropertyCodeProcessorCount to %u: %Rhrc (Last=%#x/%u)",
1187	pVM->cCpus, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1188	WHvDeletePartition(hPartition);
1189
1190	Assert(!pVM->nem.s.hPartitionDevice);
1191	Assert(!pVM->nem.s.hPartition);
1192	return rc;
1193	}
1194
1195
1196	/**
1197	* Makes sure APIC and firmware will not allow X2APIC mode.
1198	*
1199	* This is rather ugly.
1200	*
1201	* @returns VBox status code
1202	* @param pVM The cross context VM structure.
1203	*/
1204	static int nemR3WinDisableX2Apic(PVM pVM)
1205	{
1206	/*
1207	* First make sure the 'Mode' config value of the APIC isn't set to X2APIC.
1208	* This defaults to APIC, so no need to change unless it's X2APIC.
1209	*/
1210	PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/apic/0/Config");
1211	if (pCfg)
1212	{
1213	uint8_t bMode = 0;
1214	int rc = CFGMR3QueryU8(pCfg, "Mode", &bMode);
1215	AssertLogRelMsgReturn(RT_SUCCESS(rc) \|\| rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc);
1216	if (RT_SUCCESS(rc) && bMode == PDMAPICMODE_X2APIC)
1217	{
1218	LogRel(("NEM: Adjusting APIC configuration from X2APIC to APIC max mode. X2APIC is not supported by the WinHvPlatform API!\n"));
1219	LogRel(("NEM: Disable Hyper-V if you need X2APIC for your guests!\n"));
1220	rc = CFGMR3RemoveValue(pCfg, "Mode");
1221	rc = CFGMR3InsertInteger(pCfg, "Mode", PDMAPICMODE_APIC);
1222	AssertLogRelRCReturn(rc, rc);
1223	}
1224	}
1225
1226	/*
1227	* Now the firmwares.
1228	* These also defaults to APIC and only needs adjusting if configured to X2APIC (2).
1229	*/
1230	static const char * const s_apszFirmwareConfigs[] =
1231	{
1232	"/Devices/efi/0/Config",
1233	"/Devices/pcbios/0/Config",
1234	};
1235	for (unsigned i = 0; i < RT_ELEMENTS(s_apszFirmwareConfigs); i++)
1236	{
1237	pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/APIC/0/Config");
1238	if (pCfg)
1239	{
1240	uint8_t bMode = 0;
1241	int rc = CFGMR3QueryU8(pCfg, "APIC", &bMode);
1242	AssertLogRelMsgReturn(RT_SUCCESS(rc) \|\| rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc);
1243	if (RT_SUCCESS(rc) && bMode == 2)
1244	{
1245	LogRel(("NEM: Adjusting %s/Mode from 2 (X2APIC) to 1 (APIC).\n", s_apszFirmwareConfigs[i]));
1246	rc = CFGMR3RemoveValue(pCfg, "APIC");
1247	rc = CFGMR3InsertInteger(pCfg, "APIC", 1);
1248	AssertLogRelRCReturn(rc, rc);
1249	}
1250	}
1251	}
1252
1253	return VINF_SUCCESS;
1254	}
1255
1256
1257	/**
1258	* Try initialize the native API.
1259	*
1260	* This may only do part of the job, more can be done in
1261	* nemR3NativeInitAfterCPUM() and nemR3NativeInitCompleted().
1262	*
1263	* @returns VBox status code.
1264	* @param pVM The cross context VM structure.
1265	* @param fFallback Whether we're in fallback mode or use-NEM mode. In
1266	* the latter we'll fail if we cannot initialize.
1267	* @param fForced Whether the HMForced flag is set and we should
1268	* fail if we cannot initialize.
1269	*/
1270	int nemR3NativeInit(PVM pVM, bool fFallback, bool fForced)
1271	{
1272	g_uBuildNo = RTSystemGetNtBuildNo();
1273
1274	/*
1275	* Some state init.
1276	*/
1277	#ifdef NEM_WIN_WITH_A20
1278	pVM->nem.s.fA20Enabled = true;
1279	#endif
1280	#if 0
1281	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1282	{
1283	PNEMCPU pNemCpu = &pVM->apCpusR3[idCpu]->nem.s;
1284	}
1285	#endif
1286
1287	/*
1288	* Error state.
1289	* The error message will be non-empty on failure and 'rc' will be set too.
1290	*/
1291	RTERRINFOSTATIC ErrInfo;
1292	PRTERRINFO pErrInfo = RTErrInfoInitStatic(&ErrInfo);
1293	int rc = nemR3WinInitProbeAndLoad(fForced, pErrInfo);
1294	if (RT_SUCCESS(rc))
1295	{
1296	/*
1297	* Check the capabilties of the hypervisor, starting with whether it's present.
1298	*/
1299	rc = nemR3WinInitCheckCapabilities(pVM, pErrInfo);
1300	if (RT_SUCCESS(rc))
1301	{
1302	/*
1303	* Discover the VID I/O control function numbers we need (for interception
1304	* only these days).
1305	*/
1306	rc = nemR3WinInitDiscoverIoControlProperties(pVM, pErrInfo);
1307	if (RT_SUCCESS(rc))
1308	{
1309	/*
1310	* Create and initialize a partition.
1311	*/
1312	rc = nemR3WinInitCreatePartition(pVM, pErrInfo);
1313	if (RT_SUCCESS(rc))
1314	{
1315	/*
1316	* Set ourselves as the execution engine and make config adjustments.
1317	*/
1318	VM_SET_MAIN_EXECUTION_ENGINE(pVM, VM_EXEC_ENGINE_NATIVE_API);
1319	Log(("NEM: Marked active!\n"));
1320	nemR3WinDisableX2Apic(pVM);
1321	nemR3DisableCpuIsaExt(pVM, "MONITOR"); /* MONITOR is not supported by Hyper-V (MWAIT is sometimes). */
1322	PGMR3EnableNemMode(pVM);
1323
1324	/*
1325	* Register release statistics
1326	*/
1327	STAMR3Register(pVM, (void *)&pVM->nem.s.cMappedPages, STAMTYPE_U32, STAMVISIBILITY_ALWAYS,
1328	"/NEM/PagesCurrentlyMapped", STAMUNIT_PAGES, "Number guest pages currently mapped by the VM");
1329	STAMR3Register(pVM, (void *)&pVM->nem.s.StatMapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1330	"/NEM/PagesMapCalls", STAMUNIT_PAGES, "Calls to WHvMapGpaRange/HvCallMapGpaPages");
1331	STAMR3Register(pVM, (void *)&pVM->nem.s.StatMapPageFailed, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1332	"/NEM/PagesMapFails", STAMUNIT_PAGES, "Calls to WHvMapGpaRange/HvCallMapGpaPages that failed");
1333	STAMR3Register(pVM, (void *)&pVM->nem.s.StatUnmapPage, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1334	"/NEM/PagesUnmapCalls", STAMUNIT_PAGES, "Calls to WHvUnmapGpaRange/HvCallUnmapGpaPages");
1335	STAMR3Register(pVM, (void *)&pVM->nem.s.StatUnmapPageFailed, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
1336	"/NEM/PagesUnmapFails", STAMUNIT_PAGES, "Calls to WHvUnmapGpaRange/HvCallUnmapGpaPages that failed");
1337	STAMR3Register(pVM, &pVM->nem.s.StatProfMapGpaRange, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1338	"/NEM/PagesMapGpaRange", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvMapGpaRange for bigger stuff");
1339	STAMR3Register(pVM, &pVM->nem.s.StatProfUnmapGpaRange, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1340	"/NEM/PagesUnmapGpaRange", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvUnmapGpaRange for bigger stuff");
1341	STAMR3Register(pVM, &pVM->nem.s.StatProfMapGpaRangePage, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1342	"/NEM/PagesMapGpaRangePage", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvMapGpaRange for single pages");
1343	STAMR3Register(pVM, &pVM->nem.s.StatProfUnmapGpaRangePage, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
1344	"/NEM/PagesUnmapGpaRangePage", STAMUNIT_TICKS_PER_CALL, "Profiling calls to WHvUnmapGpaRange for single pages");
1345
1346	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1347	{
1348	PNEMCPU pNemCpu = &pVM->apCpusR3[idCpu]->nem.s;
1349	STAMR3RegisterF(pVM, &pNemCpu->StatExitPortIo, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of port I/O exits", "/NEM/CPU%u/ExitPortIo", idCpu);
1350	STAMR3RegisterF(pVM, &pNemCpu->StatExitMemUnmapped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unmapped memory exits", "/NEM/CPU%u/ExitMemUnmapped", idCpu);
1351	STAMR3RegisterF(pVM, &pNemCpu->StatExitMemIntercept, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of intercepted memory exits", "/NEM/CPU%u/ExitMemIntercept", idCpu);
1352	STAMR3RegisterF(pVM, &pNemCpu->StatExitHalt, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of HLT exits", "/NEM/CPU%u/ExitHalt", idCpu);
1353	STAMR3RegisterF(pVM, &pNemCpu->StatExitInterruptWindow, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of interrupt window exits", "/NEM/CPU%u/ExitInterruptWindow", idCpu);
1354	STAMR3RegisterF(pVM, &pNemCpu->StatExitCpuId, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of CPUID exits", "/NEM/CPU%u/ExitCpuId", idCpu);
1355	STAMR3RegisterF(pVM, &pNemCpu->StatExitMsr, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of MSR access exits", "/NEM/CPU%u/ExitMsr", idCpu);
1356	STAMR3RegisterF(pVM, &pNemCpu->StatExitException, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of exception exits", "/NEM/CPU%u/ExitException", idCpu);
1357	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionBp, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #BP exits", "/NEM/CPU%u/ExitExceptionBp", idCpu);
1358	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionDb, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #DB exits", "/NEM/CPU%u/ExitExceptionDb", idCpu);
1359	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionGp, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #GP exits", "/NEM/CPU%u/ExitExceptionGp", idCpu);
1360	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionGpMesa, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #GP exits from mesa driver", "/NEM/CPU%u/ExitExceptionGpMesa", idCpu);
1361	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #UD exits", "/NEM/CPU%u/ExitExceptionUd", idCpu);
1362	STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUdHandled, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of handled #UD exits", "/NEM/CPU%u/ExitExceptionUdHandled", idCpu);
1363	STAMR3RegisterF(pVM, &pNemCpu->StatExitUnrecoverable, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unrecoverable exits", "/NEM/CPU%u/ExitUnrecoverable", idCpu);
1364	STAMR3RegisterF(pVM, &pNemCpu->StatGetMsgTimeout, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of get message timeouts/alerts", "/NEM/CPU%u/GetMsgTimeout", idCpu);
1365	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuSuccess, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of successful CPU stops", "/NEM/CPU%u/StopCpuSuccess", idCpu);
1366	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPending, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stops", "/NEM/CPU%u/StopCpuPending", idCpu);
1367	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingAlerts,STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stop alerts", "/NEM/CPU%u/StopCpuPendingAlerts", idCpu);
1368	STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingOdd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of odd pending CPU stops (see code)", "/NEM/CPU%u/StopCpuPendingOdd", idCpu);
1369	STAMR3RegisterF(pVM, &pNemCpu->StatCancelChangedState, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel changed state", "/NEM/CPU%u/CancelChangedState", idCpu);
1370	STAMR3RegisterF(pVM, &pNemCpu->StatCancelAlertedThread, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel alerted EMT", "/NEM/CPU%u/CancelAlertedEMT", idCpu);
1371	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPre, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pre execution FF breaks", "/NEM/CPU%u/BreakOnFFPre", idCpu);
1372	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPost, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of post execution FF breaks", "/NEM/CPU%u/BreakOnFFPost", idCpu);
1373	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnCancel, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel execution breaks", "/NEM/CPU%u/BreakOnCancel", idCpu);
1374	STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnStatus, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of status code breaks", "/NEM/CPU%u/BreakOnStatus", idCpu);
1375	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnDemand, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of on-demand state imports", "/NEM/CPU%u/ImportOnDemand", idCpu);
1376	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturn, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of state imports on loop return", "/NEM/CPU%u/ImportOnReturn", idCpu);
1377	STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturnSkipped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of skipped state imports on loop return", "/NEM/CPU%u/ImportOnReturnSkipped", idCpu);
1378	STAMR3RegisterF(pVM, &pNemCpu->StatQueryCpuTick, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of TSC queries", "/NEM/CPU%u/QueryCpuTick", idCpu);
1379	}
1380
1381	if (!SUPR3IsDriverless())
1382	{
1383	PUVM pUVM = pVM->pUVM;
1384	STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesAvailable, STAMTYPE_U64, STAMVISIBILITY_ALWAYS,
1385	STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Free pages available to the hypervisor",
1386	"/NEM/R0Stats/cPagesAvailable");
1387	STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesInUse, STAMTYPE_U64, STAMVISIBILITY_ALWAYS,
1388	STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Pages in use by hypervisor",
1389	"/NEM/R0Stats/cPagesInUse");
1390	}
1391
1392	}
1393	}
1394	}
1395	}
1396
1397	/*
1398	* We only fail if in forced mode, otherwise just log the complaint and return.
1399	*/
1400	Assert(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API \|\| RTErrInfoIsSet(pErrInfo));
1401	if ( (fForced \|\| !fFallback)
1402	&& pVM->bMainExecutionEngine != VM_EXEC_ENGINE_NATIVE_API)
1403	return VMSetError(pVM, RT_SUCCESS_NP(rc) ? VERR_NEM_NOT_AVAILABLE : rc, RT_SRC_POS, "%s", pErrInfo->pszMsg);
1404
1405	if (RTErrInfoIsSet(pErrInfo))
1406	LogRel(("NEM: Not available: %s\n", pErrInfo->pszMsg));
1407	return VINF_SUCCESS;
1408	}
1409
1410
1411	/**
1412	* This is called after CPUMR3Init is done.
1413	*
1414	* @returns VBox status code.
1415	* @param pVM The VM handle..
1416	*/
1417	int nemR3NativeInitAfterCPUM(PVM pVM)
1418	{
1419	/*
1420	* Validate sanity.
1421	*/
1422	WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition;
1423	AssertReturn(hPartition != NULL, VERR_WRONG_ORDER);
1424	AssertReturn(!pVM->nem.s.hPartitionDevice, VERR_WRONG_ORDER);
1425	AssertReturn(!pVM->nem.s.fCreatedEmts, VERR_WRONG_ORDER);
1426	AssertReturn(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API, VERR_WRONG_ORDER);
1427
1428	/*
1429	* Continue setting up the partition now that we've got most of the CPUID feature stuff.
1430	*/
1431	WHV_PARTITION_PROPERTY Property;
1432	HRESULT hrc;
1433
1434	#if 0
1435	/* Not sure if we really need to set the vendor.
1436	Update: Apparently we don't. WHvPartitionPropertyCodeProcessorVendor was removed in 17110. */
1437	RT_ZERO(Property);
1438	Property.ProcessorVendor = pVM->nem.s.enmCpuVendor == CPUMCPUVENDOR_AMD ? WHvProcessorVendorAmd
1439	: WHvProcessorVendorIntel;
1440	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorVendor, &Property, sizeof(Property));
1441	if (FAILED(hrc))
1442	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1443	"Failed to set WHvPartitionPropertyCodeProcessorVendor to %u: %Rhrc (Last=%#x/%u)",
1444	Property.ProcessorVendor, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1445	#endif
1446
1447	/* Not sure if we really need to set the cache line flush size. */
1448	RT_ZERO(Property);
1449	Property.ProcessorClFlushSize = pVM->nem.s.cCacheLineFlushShift;
1450	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorClFlushSize, &Property, sizeof(Property));
1451	if (FAILED(hrc))
1452	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1453	"Failed to set WHvPartitionPropertyCodeProcessorClFlushSize to %u: %Rhrc (Last=%#x/%u)",
1454	pVM->nem.s.cCacheLineFlushShift, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1455
1456	/* Intercept #DB, #BP and #UD exceptions. */
1457	RT_ZERO(Property);
1458	Property.ExceptionExitBitmap = RT_BIT_64(WHvX64ExceptionTypeDebugTrapOrFault)
1459	\| RT_BIT_64(WHvX64ExceptionTypeBreakpointTrap)
1460	\| RT_BIT_64(WHvX64ExceptionTypeInvalidOpcodeFault);
1461
1462	/* Intercept #GP to workaround the buggy mesa vmwgfx driver. */
1463	PVMCPU pVCpu = pVM->apCpusR3[0]; /** @todo In theory per vCPU, in practice same for all. */
1464	if (pVCpu->nem.s.fTrapXcptGpForLovelyMesaDrv)
1465	Property.ExceptionExitBitmap \|= RT_BIT_64(WHvX64ExceptionTypeGeneralProtectionFault);
1466
1467	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExceptionExitBitmap, &Property, sizeof(Property));
1468	if (FAILED(hrc))
1469	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1470	"Failed to set WHvPartitionPropertyCodeExceptionExitBitmap to %#RX64: %Rhrc (Last=%#x/%u)",
1471	Property.ExceptionExitBitmap, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1472
1473
1474	/*
1475	* Sync CPU features with CPUM.
1476	*/
1477	/** @todo sync CPU features with CPUM. */
1478
1479	/* Set the partition property. */
1480	RT_ZERO(Property);
1481	Property.ProcessorFeatures.AsUINT64 = pVM->nem.s.uCpuFeatures.u64;
1482	hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorFeatures, &Property, sizeof(Property));
1483	if (FAILED(hrc))
1484	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1485	"Failed to set WHvPartitionPropertyCodeProcessorFeatures to %'#RX64: %Rhrc (Last=%#x/%u)",
1486	pVM->nem.s.uCpuFeatures.u64, hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1487
1488	/*
1489	* Set up the partition.
1490	*
1491	* Seems like this is where the partition is actually instantiated and we get
1492	* a handle to it.
1493	*/
1494	hrc = WHvSetupPartition(hPartition);
1495	if (FAILED(hrc))
1496	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1497	"Call to WHvSetupPartition failed: %Rhrc (Last=%#x/%u)",
1498	hrc, RTNtLastStatusValue(), RTNtLastErrorValue());
1499
1500	/*
1501	* Hysterical raisins: Get the handle (could also fish this out via VID.DLL NtDeviceIoControlFile intercepting).
1502	*/
1503	HANDLE hPartitionDevice;
1504	__try
1505	{
1506	hPartitionDevice = ((HANDLE *)hPartition)[1];
1507	if (!hPartitionDevice)
1508	hPartitionDevice = INVALID_HANDLE_VALUE;
1509	}
1510	__except(EXCEPTION_EXECUTE_HANDLER)
1511	{
1512	hrc = GetExceptionCode();
1513	hPartitionDevice = INVALID_HANDLE_VALUE;
1514	}
1515
1516	/* Test the handle. */
1517	HV_PARTITION_PROPERTY uValue = 0;
1518	if ( g_pfnVidGetPartitionProperty
1519	&& hPartitionDevice != INVALID_HANDLE_VALUE
1520	&& !g_pfnVidGetPartitionProperty(hPartitionDevice, HvPartitionPropertyProcessorVendor, &uValue))
1521	hPartitionDevice = INVALID_HANDLE_VALUE;
1522	LogRel(("NEM: HvPartitionPropertyProcessorVendor=%#llx (%lld)\n", uValue, uValue));
1523
1524	/*
1525	* More hysterical rasins: Get the partition ID if we can.
1526	*/
1527	HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID;
1528	if ( g_pfnVidGetHvPartitionId
1529	&& hPartitionDevice != INVALID_HANDLE_VALUE
1530	&& !g_pfnVidGetHvPartitionId(hPartitionDevice, &idHvPartition))
1531	{
1532	idHvPartition = HV_PARTITION_ID_INVALID;
1533	Log(("NEM: VidGetHvPartitionId failed: %#x\n", GetLastError()));
1534	}
1535	pVM->nem.s.hPartitionDevice = hPartitionDevice;
1536
1537	/*
1538	* Setup the EMTs.
1539	*/
1540	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1541	{
1542	pVCpu = pVM->apCpusR3[idCpu];
1543
1544	hrc = WHvCreateVirtualProcessor(hPartition, idCpu, 0 /fFlags/);
1545	if (FAILED(hrc))
1546	{
1547	NTSTATUS const rcNtLast = RTNtLastStatusValue();
1548	DWORD const dwErrLast = RTNtLastErrorValue();
1549	while (idCpu-- > 0)
1550	{
1551	HRESULT hrc2 = WHvDeleteVirtualProcessor(hPartition, idCpu);
1552	AssertLogRelMsg(SUCCEEDED(hrc2), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n",
1553	hPartition, idCpu, hrc2, RTNtLastStatusValue(),
1554	RTNtLastErrorValue()));
1555	}
1556	return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS,
1557	"Call to WHvCreateVirtualProcessor failed: %Rhrc (Last=%#x/%u)", hrc, rcNtLast, dwErrLast);
1558	}
1559	}
1560	pVM->nem.s.fCreatedEmts = true;
1561
1562	LogRel(("NEM: Successfully set up partition (device handle %p, partition ID %#llx)\n", hPartitionDevice, idHvPartition));
1563
1564	/*
1565	* Any hyper-v statistics we can get at now? HvCallMapStatsPage isn't accessible any more.
1566	*/
1567	/** @todo stats */
1568
1569	/*
1570	* Adjust features.
1571	*
1572	* Note! We've already disabled X2APIC and MONITOR/MWAIT via CFGM during
1573	* the first init call.
1574	*/
1575
1576	return VINF_SUCCESS;
1577	}
1578
1579
1580	int nemR3NativeInitCompleted(PVM pVM, VMINITCOMPLETED enmWhat)
1581	{
1582	//BOOL fRet = SetThreadPriority(GetCurrentThread(), 0);
1583	//AssertLogRel(fRet);
1584
1585	NOREF(pVM); NOREF(enmWhat);
1586	return VINF_SUCCESS;
1587	}
1588
1589
1590	int nemR3NativeTerm(PVM pVM)
1591	{
1592	/*
1593	* Delete the partition.
1594	*/
1595	WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition;
1596	pVM->nem.s.hPartition = NULL;
1597	pVM->nem.s.hPartitionDevice = NULL;
1598	if (hPartition != NULL)
1599	{
1600	VMCPUID idCpu = pVM->nem.s.fCreatedEmts ? pVM->cCpus : 0;
1601	LogRel(("NEM: Destroying partition %p with its %u VCpus...\n", hPartition, idCpu));
1602	while (idCpu-- > 0)
1603	{
1604	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
1605	pVCpu->nem.s.pvMsgSlotMapping = NULL;
1606	HRESULT hrc = WHvDeleteVirtualProcessor(hPartition, idCpu);
1607	AssertLogRelMsg(SUCCEEDED(hrc), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n",
1608	hPartition, idCpu, hrc, RTNtLastStatusValue(),
1609	RTNtLastErrorValue()));
1610	}
1611	WHvDeletePartition(hPartition);
1612	}
1613	pVM->nem.s.fCreatedEmts = false;
1614	return VINF_SUCCESS;
1615	}
1616
1617
1618	/**
1619	* VM reset notification.
1620	*
1621	* @param pVM The cross context VM structure.
1622	*/
1623	void nemR3NativeReset(PVM pVM)
1624	{
1625	#if 0
1626	/* Unfix the A20 gate. */
1627	pVM->nem.s.fA20Fixed = false;
1628	#else
1629	RT_NOREF(pVM);
1630	#endif
1631	}
1632
1633
1634	/**
1635	* Reset CPU due to INIT IPI or hot (un)plugging.
1636	*
1637	* @param pVCpu The cross context virtual CPU structure of the CPU being
1638	* reset.
1639	* @param fInitIpi Whether this is the INIT IPI or hot (un)plugging case.
1640	*/
1641	void nemR3NativeResetCpu(PVMCPU pVCpu, bool fInitIpi)
1642	{
1643	#ifdef NEM_WIN_WITH_A20
1644	/* Lock the A20 gate if INIT IPI, make sure it's enabled. */
1645	if (fInitIpi && pVCpu->idCpu > 0)
1646	{
1647	PVM pVM = pVCpu->CTX_SUFF(pVM);
1648	if (!pVM->nem.s.fA20Enabled)
1649	nemR3NativeNotifySetA20(pVCpu, true);
1650	pVM->nem.s.fA20Enabled = true;
1651	pVM->nem.s.fA20Fixed = true;
1652	}
1653	#else
1654	RT_NOREF(pVCpu, fInitIpi);
1655	#endif
1656	}
1657
1658
1659	VBOXSTRICTRC nemR3NativeRunGC(PVM pVM, PVMCPU pVCpu)
1660	{
1661	return nemHCWinRunGC(pVM, pVCpu);
1662	}
1663
1664
1665	VMMR3_INT_DECL(bool) NEMR3CanExecuteGuest(PVM pVM, PVMCPU pVCpu)
1666	{
1667	Assert(VM_IS_NEM_ENABLED(pVM));
1668
1669	#ifndef NEM_WIN_WITH_A20
1670	/*
1671	* Only execute when the A20 gate is enabled because this lovely Hyper-V
1672	* blackbox does not seem to have any way to enable or disable A20.
1673	*/
1674	RT_NOREF(pVM);
1675	return PGMPhysIsA20Enabled(pVCpu);
1676	#else
1677	RT_NOREF(pVM, pVCpu);
1678	return true;
1679	#endif
1680	}
1681
1682
1683	bool nemR3NativeSetSingleInstruction(PVM pVM, PVMCPU pVCpu, bool fEnable)
1684	{
1685	NOREF(pVM); NOREF(pVCpu); NOREF(fEnable);
1686	return false;
1687	}
1688
1689
1690	void nemR3NativeNotifyFF(PVM pVM, PVMCPU pVCpu, uint32_t fFlags)
1691	{
1692	Log8(("nemR3NativeNotifyFF: canceling %u\n", pVCpu->idCpu));
1693	HRESULT hrc = WHvCancelRunVirtualProcessor(pVM->nem.s.hPartition, pVCpu->idCpu, 0);
1694	AssertMsg(SUCCEEDED(hrc), ("WHvCancelRunVirtualProcessor -> hrc=%Rhrc\n", hrc));
1695	RT_NOREF_PV(hrc);
1696	RT_NOREF_PV(fFlags);
1697	}
1698
1699
1700	DECLHIDDEN(bool) nemR3NativeNotifyDebugEventChanged(PVM pVM, bool fUseDebugLoop)
1701	{
1702	RT_NOREF(pVM, fUseDebugLoop);
1703	return false;
1704	}
1705
1706
1707	DECLHIDDEN(bool) nemR3NativeNotifyDebugEventChangedPerCpu(PVM pVM, PVMCPU pVCpu, bool fUseDebugLoop)
1708	{
1709	RT_NOREF(pVM, pVCpu, fUseDebugLoop);
1710	return false;
1711	}
1712
1713
1714	DECLINLINE(int) nemR3NativeGCPhys2R3PtrReadOnly(PVM pVM, RTGCPHYS GCPhys, const void **ppv)
1715	{
1716	PGMPAGEMAPLOCK Lock;
1717	int rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, GCPhys, ppv, &Lock);
1718	if (RT_SUCCESS(rc))
1719	PGMPhysReleasePageMappingLock(pVM, &Lock);
1720	return rc;
1721	}
1722
1723
1724	DECLINLINE(int) nemR3NativeGCPhys2R3PtrWriteable(PVM pVM, RTGCPHYS GCPhys, void **ppv)
1725	{
1726	PGMPAGEMAPLOCK Lock;
1727	int rc = PGMPhysGCPhys2CCPtr(pVM, GCPhys, ppv, &Lock);
1728	if (RT_SUCCESS(rc))
1729	PGMPhysReleasePageMappingLock(pVM, &Lock);
1730	return rc;
1731	}
1732
1733
1734	VMMR3_INT_DECL(int) NEMR3NotifyPhysRamRegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvR3,
1735	uint8_t pu2State, uint32_t puNemRange)
1736	{
1737	Log5(("NEMR3NotifyPhysRamRegister: %RGp LB %RGp, pvR3=%p pu2State=%p (%d) puNemRange=%p (%d)\n",
1738	GCPhys, cb, pvR3, pu2State, pu2State, puNemRange, *puNemRange));
1739
1740	*pu2State = UINT8_MAX;
1741	RT_NOREF(puNemRange);
1742
1743	if (pvR3)
1744	{
1745	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
1746	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvR3, GCPhys, cb,
1747	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute);
1748	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
1749	if (SUCCEEDED(hrc))
1750	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
1751	else
1752	{
1753	LogRel(("NEMR3NotifyPhysRamRegister: GCPhys=%RGp LB %RGp pvR3=%p hrc=%Rhrc (%#x) Last=%#x/%u\n",
1754	GCPhys, cb, pvR3, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1755	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
1756	return VERR_NEM_MAP_PAGES_FAILED;
1757	}
1758	}
1759	return VINF_SUCCESS;
1760	}
1761
1762
1763	VMMR3_INT_DECL(bool) NEMR3IsMmio2DirtyPageTrackingSupported(PVM pVM)
1764	{
1765	RT_NOREF(pVM);
1766	return g_pfnWHvQueryGpaRangeDirtyBitmap != NULL;
1767	}
1768
1769
1770	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExMapEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags,
1771	void pvRam, void pvMmio2, uint8_t pu2State, uint32_t puNemRange)
1772	{
1773	Log5(("NEMR3NotifyPhysMmioExMapEarly: %RGp LB %RGp fFlags=%#x pvRam=%p pvMmio2=%p pu2State=%p (%d) puNemRange=%p (%#x)\n",
1774	GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State, pu2State, puNemRange, puNemRange ? puNemRange : UINT32_MAX));
1775	RT_NOREF(puNemRange);
1776
1777	/*
1778	* Unmap the RAM we're replacing.
1779	*/
1780	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE)
1781	{
1782	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfUnmapGpaRange, a);
1783	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, cb);
1784	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfUnmapGpaRange, a);
1785	if (SUCCEEDED(hrc))
1786	{ /* likely */ }
1787	else if (pvMmio2)
1788	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u (ignored)\n",
1789	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1790	else
1791	{
1792	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u\n",
1793	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1794	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
1795	return VERR_NEM_UNMAP_PAGES_FAILED;
1796	}
1797	}
1798
1799	/*
1800	* Map MMIO2 if any.
1801	*/
1802	if (pvMmio2)
1803	{
1804	Assert(fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2);
1805	WHV_MAP_GPA_RANGE_FLAGS fWHvFlags = WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute;
1806	if ((fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_TRACK_DIRTY_PAGES) && g_pfnWHvQueryGpaRangeDirtyBitmap)
1807	fWHvFlags \|= WHvMapGpaRangeFlagTrackDirtyPages;
1808	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
1809	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvMmio2, GCPhys, cb, fWHvFlags);
1810	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
1811	if (SUCCEEDED(hrc))
1812	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
1813	else
1814	{
1815	LogRel(("NEMR3NotifyPhysMmioExMapEarly: GCPhys=%RGp LB %RGp fFlags=%#x pvMmio2=%p fWHvFlags=%#x: Map -> hrc=%Rhrc (%#x) Last=%#x/%u\n",
1816	GCPhys, cb, fFlags, pvMmio2, fWHvFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1817	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
1818	return VERR_NEM_MAP_PAGES_FAILED;
1819	}
1820	}
1821	else
1822	{
1823	Assert(!(fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2));
1824	*pu2State = NEM_WIN_PAGE_STATE_UNMAPPED;
1825	}
1826	RT_NOREF(pvRam);
1827	return VINF_SUCCESS;
1828	}
1829
1830
1831	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExMapLate(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags,
1832	void pvRam, void pvMmio2, uint32_t *puNemRange)
1833	{
1834	RT_NOREF(pVM, GCPhys, cb, fFlags, pvRam, pvMmio2, puNemRange);
1835	return VINF_SUCCESS;
1836	}
1837
1838
1839	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExUnmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags, void *pvRam,
1840	void pvMmio2, uint8_t pu2State, uint32_t *puNemRange)
1841	{
1842	int rc = VINF_SUCCESS;
1843	Log5(("NEMR3NotifyPhysMmioExUnmap: %RGp LB %RGp fFlags=%#x pvRam=%p pvMmio2=%p pu2State=%p uNemRange=%#x (%#x)\n",
1844	GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State, puNemRange, *puNemRange));
1845
1846	/*
1847	* Unmap the MMIO2 pages.
1848	*/
1849	/** @todo If we implement aliasing (MMIO2 page aliased into MMIO range),
1850	* we may have more stuff to unmap even in case of pure MMIO... */
1851	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_MMIO2)
1852	{
1853	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfUnmapGpaRange, a);
1854	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, cb);
1855	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfUnmapGpaRange, a);
1856	if (FAILED(hrc))
1857	{
1858	LogRel2(("NEMR3NotifyPhysMmioExUnmap: GCPhys=%RGp LB %RGp fFlags=%#x: Unmap -> hrc=%Rhrc (%#x) Last=%#x/%u (ignored)\n",
1859	GCPhys, cb, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1860	rc = VERR_NEM_UNMAP_PAGES_FAILED;
1861	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
1862	}
1863	}
1864
1865	/*
1866	* Restore the RAM we replaced.
1867	*/
1868	if (fFlags & NEM_NOTIFY_PHYS_MMIO_EX_F_REPLACE)
1869	{
1870	AssertPtr(pvRam);
1871	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
1872	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvRam, GCPhys, cb,
1873	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagWrite \| WHvMapGpaRangeFlagExecute);
1874	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
1875	if (SUCCEEDED(hrc))
1876	{ /* likely */ }
1877	else
1878	{
1879	LogRel(("NEMR3NotifyPhysMmioExUnmap: GCPhys=%RGp LB %RGp pvMmio2=%p hrc=%Rhrc (%#x) Last=%#x/%u\n",
1880	GCPhys, cb, pvMmio2, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1881	rc = VERR_NEM_MAP_PAGES_FAILED;
1882	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
1883	}
1884	if (pu2State)
1885	*pu2State = NEM_WIN_PAGE_STATE_WRITABLE;
1886	}
1887	/* Mark the pages as unmapped if relevant. */
1888	else if (pu2State)
1889	*pu2State = NEM_WIN_PAGE_STATE_UNMAPPED;
1890
1891	RT_NOREF(pvMmio2, puNemRange);
1892	return rc;
1893	}
1894
1895
1896	VMMR3_INT_DECL(int) NEMR3PhysMmio2QueryAndResetDirtyBitmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t uNemRange,
1897	void *pvBitmap, size_t cbBitmap)
1898	{
1899	Assert(VM_IS_NEM_ENABLED(pVM));
1900	AssertReturn(g_pfnWHvQueryGpaRangeDirtyBitmap, VERR_INTERNAL_ERROR_2);
1901	Assert(cbBitmap == (uint32_t)cbBitmap);
1902	RT_NOREF(uNemRange);
1903
1904	/* This is being profiled by PGM, see /PGM/Mmio2QueryAndResetDirtyBitmap. */
1905	HRESULT hrc = WHvQueryGpaRangeDirtyBitmap(pVM->nem.s.hPartition, GCPhys, cb, (UINT64 *)pvBitmap, (uint32_t)cbBitmap);
1906	if (SUCCEEDED(hrc))
1907	return VINF_SUCCESS;
1908
1909	AssertLogRelMsgFailed(("GCPhys=%RGp LB %RGp pvBitmap=%p LB %#zx hrc=%Rhrc (%#x) Last=%#x/%u\n",
1910	GCPhys, cb, pvBitmap, cbBitmap, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1911	return VERR_NEM_QUERY_DIRTY_BITMAP_FAILED;
1912	}
1913
1914
1915	VMMR3_INT_DECL(int) NEMR3NotifyPhysRomRegisterEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvPages, uint32_t fFlags,
1916	uint8_t pu2State, uint32_t puNemRange)
1917	{
1918	Log5(("nemR3NativeNotifyPhysRomRegisterEarly: %RGp LB %RGp pvPages=%p fFlags=%#x\n", GCPhys, cb, pvPages, fFlags));
1919	*pu2State = UINT8_MAX;
1920	*puNemRange = 0;
1921
1922	#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. */
1923	RTGCPHYS const cPages = cb >> X86_PAGE_SHIFT;
1924	for (RTGCPHYS iPage = 0; iPage < cPages; iPage++, GCPhys += X86_PAGE_SIZE)
1925	{
1926	const void *pvPage;
1927	int rc = nemR3NativeGCPhys2R3PtrReadOnly(pVM, GCPhys, &pvPage);
1928	if (RT_SUCCESS(rc))
1929	{
1930	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, (void *)pvPage, GCPhys, X86_PAGE_SIZE,
1931	WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagExecute);
1932	if (SUCCEEDED(hrc))
1933	{ /* likely */ }
1934	else
1935	{
1936	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n",
1937	GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1938	return VERR_NEM_INIT_FAILED;
1939	}
1940	}
1941	else
1942	{
1943	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp rc=%Rrc\n", GCPhys, rc));
1944	return rc;
1945	}
1946	}
1947	RT_NOREF_PV(fFlags);
1948	#else
1949	RT_NOREF(pVM, GCPhys, cb, pvPages, fFlags);
1950	#endif
1951	return VINF_SUCCESS;
1952	}
1953
1954
1955	VMMR3_INT_DECL(int) NEMR3NotifyPhysRomRegisterLate(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, void *pvPages,
1956	uint32_t fFlags, uint8_t pu2State, uint32_t puNemRange)
1957	{
1958	Log5(("nemR3NativeNotifyPhysRomRegisterLate: %RGp LB %RGp pvPages=%p fFlags=%#x pu2State=%p (%d) puNemRange=%p (%#x)\n",
1959	GCPhys, cb, pvPages, fFlags, pu2State, pu2State, puNemRange, puNemRange));
1960	*pu2State = UINT8_MAX;
1961
1962	/*
1963	* (Re-)map readonly.
1964	*/
1965	AssertPtrReturn(pvPages, VERR_INVALID_POINTER);
1966	STAM_REL_PROFILE_START(&pVM->nem.s.StatProfMapGpaRange, a);
1967	HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, pvPages, GCPhys, cb, WHvMapGpaRangeFlagRead \| WHvMapGpaRangeFlagExecute);
1968	STAM_REL_PROFILE_STOP(&pVM->nem.s.StatProfMapGpaRange, a);
1969	if (SUCCEEDED(hrc))
1970	*pu2State = NEM_WIN_PAGE_STATE_READABLE;
1971	else
1972	{
1973	LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp LB %RGp pvPages=%p fFlags=%#x hrc=%Rhrc (%#x) Last=%#x/%u\n",
1974	GCPhys, cb, pvPages, fFlags, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
1975	STAM_REL_COUNTER_INC(&pVM->nem.s.StatMapPageFailed);
1976	return VERR_NEM_MAP_PAGES_FAILED;
1977	}
1978	RT_NOREF(fFlags, puNemRange);
1979	return VINF_SUCCESS;
1980	}
1981
1982	#ifdef NEM_WIN_WITH_A20
1983
1984	/**
1985	* @callback_method_impl{FNPGMPHYSNEMCHECKPAGE}
1986	*/
1987	static DECLCALLBACK(int) nemR3WinUnsetForA20CheckerCallback(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys,
1988	PPGMPHYSNEMPAGEINFO pInfo, void *pvUser)
1989	{
1990	/* We'll just unmap the memory. */
1991	if (pInfo->u2NemState > NEM_WIN_PAGE_STATE_UNMAPPED)
1992	{
1993	HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, X86_PAGE_SIZE);
1994	if (SUCCEEDED(hrc))
1995	{
1996	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPage);
1997	uint32_t cMappedPages = ASMAtomicDecU32(&pVM->nem.s.cMappedPages); NOREF(cMappedPages);
1998	Log5(("NEM GPA unmapped/A20: %RGp (was %s, cMappedPages=%u)\n", GCPhys, g_apszPageStates[pInfo->u2NemState], cMappedPages));
1999	pInfo->u2NemState = NEM_WIN_PAGE_STATE_UNMAPPED;
2000	}
2001	else
2002	{
2003	STAM_REL_COUNTER_INC(&pVM->nem.s.StatUnmapPageFailed);
2004	LogRel(("nemR3WinUnsetForA20CheckerCallback/unmap: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n",
2005	GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()));
2006	return VERR_INTERNAL_ERROR_2;
2007	}
2008	}
2009	RT_NOREF(pVCpu, pvUser);
2010	return VINF_SUCCESS;
2011	}
2012
2013
2014	/**
2015	* Unmaps a page from Hyper-V for the purpose of emulating A20 gate behavior.
2016	*
2017	* @returns The PGMPhysNemQueryPageInfo result.
2018	* @param pVM The cross context VM structure.
2019	* @param pVCpu The cross context virtual CPU structure.
2020	* @param GCPhys The page to unmap.
2021	*/
2022	static int nemR3WinUnmapPageForA20Gate(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys)
2023	{
2024	PGMPHYSNEMPAGEINFO Info;
2025	return PGMPhysNemPageInfoChecker(pVM, pVCpu, GCPhys, false /fMakeWritable/, &Info,
2026	nemR3WinUnsetForA20CheckerCallback, NULL);
2027	}
2028
2029	#endif /* NEM_WIN_WITH_A20 */
2030
2031	VMMR3_INT_DECL(void) NEMR3NotifySetA20(PVMCPU pVCpu, bool fEnabled)
2032	{
2033	Log(("nemR3NativeNotifySetA20: fEnabled=%RTbool\n", fEnabled));
2034	Assert(VM_IS_NEM_ENABLED(pVCpu->CTX_SUFF(pVM)));
2035	#ifdef NEM_WIN_WITH_A20
2036	PVM pVM = pVCpu->CTX_SUFF(pVM);
2037	if (!pVM->nem.s.fA20Fixed)
2038	{
2039	pVM->nem.s.fA20Enabled = fEnabled;
2040	for (RTGCPHYS GCPhys = _1M; GCPhys < _1M + _64K; GCPhys += X86_PAGE_SIZE)
2041	nemR3WinUnmapPageForA20Gate(pVM, pVCpu, GCPhys);
2042	}
2043	#else
2044	RT_NOREF(pVCpu, fEnabled);
2045	#endif
2046	}
2047
2048
2049	/** @page pg_nem_win NEM/win - Native Execution Manager, Windows.
2050	*
2051	* On Windows the Hyper-V root partition (dom0 in zen terminology) does not have
2052	* nested VT-x or AMD-V capabilities. Early on raw-mode worked inside it, but
2053	* for a while now we've been getting \#GPs when trying to modify CR4 in the
2054	* world switcher. So, when Hyper-V is active on Windows we have little choice
2055	* but to use Hyper-V to run our VMs.
2056	*
2057	*
2058	* @section sub_nem_win_whv The WinHvPlatform API
2059	*
2060	* Since Windows 10 build 17083 there is a documented API for managing Hyper-V
2061	* VMs: header file WinHvPlatform.h and implementation in WinHvPlatform.dll.
2062	* This interface is a wrapper around the undocumented Virtualization
2063	* Infrastructure Driver (VID) API - VID.DLL and VID.SYS. The wrapper is
2064	* written in C++, namespaced, early versions (at least) was using standard C++
2065	* container templates in several places.
2066	*
2067	* When creating a VM using WHvCreatePartition, it will only create the
2068	* WinHvPlatform structures for it, to which you get an abstract pointer. The
2069	* VID API that actually creates the partition is first engaged when you call
2070	* WHvSetupPartition after first setting a lot of properties using
2071	* WHvSetPartitionProperty. Since the VID API is just a very thin wrapper
2072	* around CreateFile and NtDeviceIoControlFile, it returns an actual HANDLE for
2073	* the partition to WinHvPlatform. We fish this HANDLE out of the WinHvPlatform
2074	* partition structures because we need to talk directly to VID for reasons
2075	* we'll get to in a bit. (Btw. we could also intercept the CreateFileW or
2076	* NtDeviceIoControlFile calls from VID.DLL to get the HANDLE should fishing in
2077	* the partition structures become difficult.)
2078	*
2079	* The WinHvPlatform API requires us to both set the number of guest CPUs before
2080	* setting up the partition and call WHvCreateVirtualProcessor for each of them.
2081	* The CPU creation function boils down to a VidMessageSlotMap call that sets up
2082	* and maps a message buffer into ring-3 for async communication with hyper-V
2083	* and/or the VID.SYS thread actually running the CPU thru
2084	* WinHvRunVpDispatchLoop(). When for instance a VMEXIT is encountered, hyper-V
2085	* sends a message that the WHvRunVirtualProcessor API retrieves (and later
2086	* acknowledges) via VidMessageSlotHandleAndGetNext. Since or about build
2087	* 17757 a register page is also mapped into user space when creating the
2088	* virtual CPU. It should be noteded that WHvDeleteVirtualProcessor doesn't do
2089	* much as there seems to be no partner function VidMessagesSlotMap that
2090	* reverses what it did.
2091	*
2092	* Memory is managed thru calls to WHvMapGpaRange and WHvUnmapGpaRange (GPA does
2093	* not mean grade point average here, but rather guest physical addressspace),
2094	* which corresponds to VidCreateVaGpaRangeSpecifyUserVa and VidDestroyGpaRange
2095	* respectively. As 'UserVa' indicates, the functions works on user process
2096	* memory. The mappings are also subject to quota restrictions, so the number
2097	* of ranges are limited and probably their total size as well. Obviously
2098	* VID.SYS keeps track of the ranges, but so does WinHvPlatform, which means
2099	* there is a bit of overhead involved and quota restrctions makes sense.
2100	*
2101	* Running guest code is done through the WHvRunVirtualProcessor function. It
2102	* asynchronously starts or resumes hyper-V CPU execution and then waits for an
2103	* VMEXIT message. Hyper-V / VID.SYS will return information about the message
2104	* in the message buffer mapping, and WHvRunVirtualProcessor will convert that
2105	* finto it's own WHV_RUN_VP_EXIT_CONTEXT format.
2106	*
2107	* Other threads can interrupt the execution by using WHvCancelVirtualProcessor,
2108	* which since or about build 17757 uses VidMessageSlotHandleAndGetNext to do
2109	* the work (earlier builds would open the waiting thread, do a dummy
2110	* QueueUserAPC on it, and let it upon return use VidStopVirtualProcessor to
2111	* do the actual stopping). While there is certainly a race between cancelation
2112	* and the CPU causing a natural VMEXIT, it is not known whether this still
2113	* causes extra work on subsequent WHvRunVirtualProcessor calls (it did in and
2114	* earlier than 17134).
2115	*
2116	* Registers are retrieved and set via WHvGetVirtualProcessorRegisters and
2117	* WHvSetVirtualProcessorRegisters. In addition, several VMEXITs include
2118	* essential register state in the exit context information, potentially making
2119	* it possible to emulate the instruction causing the exit without involving
2120	* WHvGetVirtualProcessorRegisters.
2121	*
2122	*
2123	* @subsection subsec_nem_win_whv_cons Issues & Feedback
2124	*
2125	* Here are some observations (mostly against build 17101):
2126	*
2127	* - The VMEXIT performance is dismal (build 17134).
2128	*
2129	* Our proof of concept implementation with a kernel runloop (i.e. not using
2130	* WHvRunVirtualProcessor and friends, but calling VID.SYS fast I/O control
2131	* entry point directly) delivers 9-10% of the port I/O performance and only
2132	* 6-7% of the MMIO performance that we have with our own hypervisor.
2133	*
2134	* When using the offical WinHvPlatform API, the numbers are %3 for port I/O
2135	* and 5% for MMIO.
2136	*
2137	* While the tests we've done are using tight tight loops only doing port I/O
2138	* and MMIO, the problem is clearly visible when running regular guest OSes.
2139	* Anything that hammers the VGA device would be suffering, for example:
2140	*
2141	* - Windows 2000 boot screen animation overloads us with MMIO exits
2142	* and won't even boot because all the time is spent in interrupt
2143	* handlers and redrawin the screen.
2144	*
2145	* - DSL 4.4 and its bootmenu logo is slower than molasses in january.
2146	*
2147	* We have not found a workaround for this yet.
2148	*
2149	* Something that might improve the issue a little is to detect blocks with
2150	* excessive MMIO and port I/O exits and emulate instructions to cover
2151	* multiple exits before letting Hyper-V have a go at the guest execution
2152	* again. This will only improve the situation under some circumstances,
2153	* since emulating instructions without recompilation can be expensive, so
2154	* there will only be real gains if the exitting instructions are tightly
2155	* packed.
2156	*
2157	* Update: Security fixes during the summer of 2018 caused the performance to
2158	* dropped even more.
2159	*
2160	* Update [build 17757]: Some performance improvements here, but they don't
2161	* yet make up for what was lost this summer.
2162	*
2163	*
2164	* - We need a way to directly modify the TSC offset (or bias if you like).
2165	*
2166	* The current approach of setting the WHvX64RegisterTsc register one by one
2167	* on each virtual CPU in sequence will introduce random inaccuracies,
2168	* especially if the thread doing the job is reschduled at a bad time.
2169	*
2170	*
2171	* - Unable to access WHvX64RegisterMsrMtrrCap (build 17134).
2172	*
2173	*
2174	* - On AMD Ryzen grub/debian 9.0 ends up with a unrecoverable exception
2175	* when IA32_MTRR_PHYSMASK0 is written.
2176	*
2177	*
2178	* - The IA32_APIC_BASE register does not work right:
2179	*
2180	* - Attempts by the guest to clear bit 11 (EN) are ignored, both the
2181	* guest and the VMM reads back the old value.
2182	*
2183	* - Attempts to modify the base address (bits NN:12) seems to be ignored
2184	* in the same way.
2185	*
2186	* - The VMM can modify both the base address as well as the the EN and
2187	* BSP bits, however this is useless if we cannot intercept the WRMSR.
2188	*
2189	* - Attempts by the guest to set the EXTD bit (X2APIC) result in \#GP(0),
2190	* while the VMM ends up with with ERROR_HV_INVALID_PARAMETER. Seems
2191	* there is no way to support X2APIC.
2192	*
2193	*
2194	* - Not sure if this is a thing, but WHvCancelVirtualProcessor seems to cause
2195	* cause a lot more spurious WHvRunVirtualProcessor returns that what we get
2196	* with the replacement code. By spurious returns we mean that the
2197	* subsequent call to WHvRunVirtualProcessor would return immediately.
2198	*
2199	* Update [build 17757]: New cancelation code might have addressed this, but
2200	* haven't had time to test it yet.
2201	*
2202	*
2203	* - There is no API for modifying protection of a page within a GPA range.
2204	*
2205	* From what we can tell, the only way to modify the protection (like readonly
2206	* -> writable, or vice versa) is to first unmap the range and then remap it
2207	* with the new protection.
2208	*
2209	* We are for instance doing this quite a bit in order to track dirty VRAM
2210	* pages. VRAM pages starts out as readonly, when the guest writes to a page
2211	* we take an exit, notes down which page it is, makes it writable and restart
2212	* the instruction. After refreshing the display, we reset all the writable
2213	* pages to readonly again, bulk fashion.
2214	*
2215	* Now to work around this issue, we do page sized GPA ranges. In addition to
2216	* add a lot of tracking overhead to WinHvPlatform and VID.SYS, this also
2217	* causes us to exceed our quota before we've even mapped a default sized
2218	* (128MB) VRAM page-by-page. So, to work around this quota issue we have to
2219	* lazily map pages and actively restrict the number of mappings.
2220	*
2221	* Our best workaround thus far is bypassing WinHvPlatform and VID entirely
2222	* when in comes to guest memory management and instead use the underlying
2223	* hypercalls (HvCallMapGpaPages, HvCallUnmapGpaPages) to do it ourselves.
2224	* (This also maps a whole lot better into our own guest page management
2225	* infrastructure.)
2226	*
2227	* Update [build 17757]: Introduces a KVM like dirty logging API which could
2228	* help tracking dirty VGA pages, while being useless for shadow ROM and
2229	* devices trying catch the guest updating descriptors and such.
2230	*
2231	*
2232	* - Observed problems doing WHvUnmapGpaRange immediately followed by
2233	* WHvMapGpaRange.
2234	*
2235	* As mentioned above, we've been forced to use this sequence when modifying
2236	* page protection. However, when transitioning from readonly to writable,
2237	* we've ended up looping forever with the same write to readonly memory
2238	* VMEXIT. We're wondering if this issue might be related to the lazy mapping
2239	* logic in WinHvPlatform.
2240	*
2241	* Workaround: Insert a WHvRunVirtualProcessor call and make sure to get a GPA
2242	* unmapped exit between the two calls. Not entirely great performance wise
2243	* (or the santity of our code).
2244	*
2245	*
2246	* - Implementing A20 gate behavior is tedious, where as correctly emulating the
2247	* A20M# pin (present on 486 and later) is near impossible for SMP setups
2248	* (e.g. possiblity of two CPUs with different A20 status).
2249	*
2250	* Workaround #1 (obsolete): Only do A20 on CPU 0, restricting the emulation
2251	* to HMA. We unmap all pages related to HMA (0x100000..0x10ffff) when the A20
2252	* state changes, lazily syncing the right pages back when accessed.
2253	*
2254	* Workaround #2 (used): Use IEM when the A20 gate is disabled.
2255	*
2256	*
2257	* - WHVRunVirtualProcessor wastes time converting VID/Hyper-V messages to its
2258	* own format (WHV_RUN_VP_EXIT_CONTEXT).
2259	*
2260	* We understand this might be because Microsoft wishes to remain free to
2261	* modify the VID/Hyper-V messages, but it's still rather silly and does slow
2262	* things down a little. We'd much rather just process the messages directly.
2263	*
2264	*
2265	* - WHVRunVirtualProcessor would've benefited from using a callback interface:
2266	*
2267	* - The potential size changes of the exit context structure wouldn't be
2268	* an issue, since the function could manage that itself.
2269	*
2270	* - State handling could probably be simplified (like cancelation).
2271	*
2272	*
2273	* - WHvGetVirtualProcessorRegisters and WHvSetVirtualProcessorRegisters
2274	* internally converts register names, probably using temporary heap buffers.
2275	*
2276	* From the looks of things, they are converting from WHV_REGISTER_NAME to
2277	* HV_REGISTER_NAME from in the "Virtual Processor Register Names" section in
2278	* the "Hypervisor Top-Level Functional Specification" document. This feels
2279	* like an awful waste of time.
2280	*
2281	* We simply cannot understand why HV_REGISTER_NAME isn't used directly here,
2282	* or at least the same values, making any conversion reduntant. Restricting
2283	* access to certain registers could easily be implement by scanning the
2284	* inputs.
2285	*
2286	* To avoid the heap + conversion overhead, we're currently using the
2287	* HvCallGetVpRegisters and HvCallSetVpRegisters calls directly, at least for
2288	* the ring-0 code.
2289	*
2290	* Update [build 17757]: Register translation has been very cleverly
2291	* optimized and made table driven (2 top level tables, 4 + 1 leaf tables).
2292	* Register information consists of the 32-bit HV register name, register page
2293	* offset, and flags (giving valid offset, size and more). Register
2294	* getting/settings seems to be done by hoping that the register page provides
2295	* it all, and falling back on the VidSetVirtualProcessorState if one or more
2296	* registers are not available there.
2297	*
2298	* Note! We have currently not updated our ring-0 code to take the register
2299	* page into account, so it's suffering a little compared to the ring-3 code
2300	* that now uses the offical APIs for registers.
2301	*
2302	*
2303	* - The YMM and XCR0 registers are not yet named (17083). This probably
2304	* wouldn't be a problem if HV_REGISTER_NAME was used, see previous point.
2305	*
2306	* Update [build 17757]: XCR0 is added. YMM register values seems to be put
2307	* into a yet undocumented XsaveState interface. Approach is a little bulky,
2308	* but saves number of enums and dispenses with register transation. Also,
2309	* the underlying Vid setter API duplicates the input buffer on the heap,
2310	* adding a 16 byte header.
2311	*
2312	*
2313	* - Why does VID.SYS only query/set 32 registers at the time thru the
2314	* HvCallGetVpRegisters and HvCallSetVpRegisters hypercalls?
2315	*
2316	* We've not trouble getting/setting all the registers defined by
2317	* WHV_REGISTER_NAME in one hypercall (around 80). Some kind of stack
2318	* buffering or similar?
2319	*
2320	*
2321	* - To handle the VMMCALL / VMCALL instructions, it seems we need to intercept
2322	* \#UD exceptions and inspect the opcodes. A dedicated exit for hypercalls
2323	* would be more efficient, esp. for guests using \#UD for other purposes..
2324	*
2325	*
2326	* - Wrong instruction length in the VpContext with unmapped GPA memory exit
2327	* contexts on 17115/AMD.
2328	*
2329	* One byte "PUSH CS" was reported as 2 bytes, while a two byte
2330	* "MOV [EBX],EAX" was reported with a 1 byte instruction length. Problem
2331	* naturally present in untranslated hyper-v messages.
2332	*
2333	*
2334	* - The I/O port exit context information seems to be missing the address size
2335	* information needed for correct string I/O emulation.
2336	*
2337	* VT-x provides this information in bits 7:9 in the instruction information
2338	* field on newer CPUs. AMD-V in bits 7:9 in the EXITINFO1 field in the VMCB.
2339	*
2340	* We can probably work around this by scanning the instruction bytes for
2341	* address size prefixes. Haven't investigated it any further yet.
2342	*
2343	*
2344	* - Querying WHvCapabilityCodeExceptionExitBitmap returns zero even when
2345	* intercepts demonstrably works (17134).
2346	*
2347	*
2348	* - Querying HvPartitionPropertyDebugChannelId via HvCallGetPartitionProperty
2349	* (hypercall) hangs the host (17134).
2350	*
2351	* - CommonUtilities::GuidToString needs a 'static' before the hex digit array,
2352	* looks pointless to re-init a stack copy it for each call (novice mistake).
2353	*
2354	*
2355	* Old concerns that have been addressed:
2356	*
2357	* - The WHvCancelVirtualProcessor API schedules a dummy usermode APC callback
2358	* in order to cancel any current or future alertable wait in VID.SYS during
2359	* the VidMessageSlotHandleAndGetNext call.
2360	*
2361	* IIRC this will make the kernel schedule the specified callback thru
2362	* NTDLL!KiUserApcDispatcher by modifying the thread context and quite
2363	* possibly the userland thread stack. When the APC callback returns to
2364	* KiUserApcDispatcher, it will call NtContinue to restore the old thread
2365	* context and resume execution from there. This naturally adds up to some
2366	* CPU cycles, ring transitions aren't for free, especially after Spectre &
2367	* Meltdown mitigations.
2368	*
2369	* Using NtAltertThread call could do the same without the thread context
2370	* modifications and the extra kernel call.
2371	*
2372	* Update: All concerns have addressed in or about build 17757.
2373	*
2374	* The WHvCancelVirtualProcessor API is now implemented using a new
2375	* VidMessageSlotHandleAndGetNext() flag (4). Codepath is slightly longer
2376	* than NtAlertThread, but has the added benefit that spurious wakeups can be
2377	* more easily reduced.
2378	*
2379	*
2380	* - When WHvRunVirtualProcessor returns without a message, or on a terse
2381	* VID message like HLT, it will make a kernel call to get some registers.
2382	* This is potentially inefficient if the caller decides he needs more
2383	* register state.
2384	*
2385	* It would be better to just return what's available and let the caller fetch
2386	* what is missing from his point of view in a single kernel call.
2387	*
2388	* Update: All concerns have been addressed in or about build 17757. Selected
2389	* registers are now available via shared memory and thus HLT should (not
2390	* verified) no longer require a system call to compose the exit context data.
2391	*
2392	*
2393	* - The WHvRunVirtualProcessor implementation does lazy GPA range mappings when
2394	* a unmapped GPA message is received from hyper-V.
2395	*
2396	* Since MMIO is currently realized as unmapped GPA, this will slow down all
2397	* MMIO accesses a tiny little bit as WHvRunVirtualProcessor looks up the
2398	* guest physical address to check if it is a pending lazy mapping.
2399	*
2400	* The lazy mapping feature makes no sense to us. We as API user have all the
2401	* information and can do lazy mapping ourselves if we want/have to (see next
2402	* point).
2403	*
2404	* Update: All concerns have been addressed in or about build 17757.
2405	*
2406	*
2407	* - The WHvGetCapability function has a weird design:
2408	* - The CapabilityCode parameter is pointlessly duplicated in the output
2409	* structure (WHV_CAPABILITY).
2410	*
2411	* - API takes void pointer, but everyone will probably be using
2412	* WHV_CAPABILITY due to WHV_CAPABILITY::CapabilityCode making it
2413	* impractical to use anything else.
2414	*
2415	* - No output size.
2416	*
2417	* - See GetFileAttributesEx, GetFileInformationByHandleEx,
2418	* FindFirstFileEx, and others for typical pattern for generic
2419	* information getters.
2420	*
2421	* Update: All concerns have been addressed in build 17110.
2422	*
2423	*
2424	* - The WHvGetPartitionProperty function uses the same weird design as
2425	* WHvGetCapability, see above.
2426	*
2427	* Update: All concerns have been addressed in build 17110.
2428	*
2429	*
2430	* - The WHvSetPartitionProperty function has a totally weird design too:
2431	* - In contrast to its partner WHvGetPartitionProperty, the property code
2432	* is not a separate input parameter here but part of the input
2433	* structure.
2434	*
2435	* - The input structure is a void pointer rather than a pointer to
2436	* WHV_PARTITION_PROPERTY which everyone probably will be using because
2437	* of the WHV_PARTITION_PROPERTY::PropertyCode field.
2438	*
2439	* - Really, why use PVOID for the input when the function isn't accepting
2440	* minimal sizes. E.g. WHVPartitionPropertyCodeProcessorClFlushSize only
2441	* requires a 9 byte input, but the function insists on 16 bytes (17083).
2442	*
2443	* - See GetFileAttributesEx, SetFileInformationByHandle, FindFirstFileEx,
2444	* and others for typical pattern for generic information setters and
2445	* getters.
2446	*
2447	* Update: All concerns have been addressed in build 17110.
2448	*
2449	*
2450	* @section sec_nem_win_large_pages Large Pages
2451	*
2452	* We've got a standalone memory allocation and access testcase bs3-memalloc-1
2453	* which was run with 48GiB of guest RAM configured on a NUC 11 box running
2454	* Windows 11 GA. In the simplified NEM memory mode no exits should be
2455	* generated while the access tests are running.
2456	*
2457	* The bs3-memalloc-1 results kind of hints at some tiny speed-up if the guest
2458	* RAM is allocated using the MEM_LARGE_PAGES flag, but only in the 3rd access
2459	* check (typical 350 000 MiB/s w/o and around 400 000 MiB/s). The result for
2460	* the 2nd access varies a lot, perhaps hinting at some table optimizations
2461	* going on.
2462	*
2463	* The initial access where the memory is locked/whatever has absolutely horrid
2464	* results regardless of whether large pages are enabled or not. Typically
2465	* bobbing close to 500 MiB/s, non-large pages a little faster.
2466	*
2467	* NEM w/ simplified memory and MEM_LARGE_PAGES:
2468	* @verbatim
2469	bs3-memalloc-1: TESTING...
2470	bs3-memalloc-1: #0/0x0: 0x0000000000000000 LB 0x000000000009fc00 USABLE (1)
2471	bs3-memalloc-1: #1/0x1: 0x000000000009fc00 LB 0x0000000000000400 RESERVED (2)
2472	bs3-memalloc-1: #2/0x2: 0x00000000000f0000 LB 0x0000000000010000 RESERVED (2)
2473	bs3-memalloc-1: #3/0x3: 0x0000000000100000 LB 0x00000000dfef0000 USABLE (1)
2474	bs3-memalloc-1: #4/0x4: 0x00000000dfff0000 LB 0x0000000000010000 ACPI_RECLAIMABLE (3)
2475	bs3-memalloc-1: #5/0x5: 0x00000000fec00000 LB 0x0000000000001000 RESERVED (2)
2476	bs3-memalloc-1: #6/0x6: 0x00000000fee00000 LB 0x0000000000001000 RESERVED (2)
2477	bs3-memalloc-1: #7/0x7: 0x00000000fffc0000 LB 0x0000000000040000 RESERVED (2)
2478	bs3-memalloc-1: #8/0x9: 0x0000000100000000 LB 0x0000000b20000000 USABLE (1)
2479	bs3-memalloc-1: Found 1 interesting entries covering 0xb20000000 bytes (44 GB).
2480	bs3-memalloc-1: From 0x100000000 to 0xc20000000
2481	bs3-memalloc-1: INT15h/E820 : PASSED
2482	bs3-memalloc-1: Mapping memory above 4GB : PASSED
2483	bs3-memalloc-1: Pages : 11 665 408 pages
2484	bs3-memalloc-1: MiBs : 45 568 MB
2485	bs3-memalloc-1: Alloc elapsed : 90 925 263 996 ns
2486	bs3-memalloc-1: Alloc elapsed in ticks : 272 340 387 336 ticks
2487	bs3-memalloc-1: Page alloc time : 7 794 ns/page
2488	bs3-memalloc-1: Page alloc time in ticks : 23 345 ticks/page
2489	bs3-memalloc-1: Alloc thruput : 128 296 pages/s
2490	bs3-memalloc-1: Alloc thruput in MiBs : 501 MB/s
2491	bs3-memalloc-1: Allocation speed : PASSED
2492	bs3-memalloc-1: Access elapsed : 85 074 483 467 ns
2493	bs3-memalloc-1: Access elapsed in ticks : 254 816 088 412 ticks
2494	bs3-memalloc-1: Page access time : 7 292 ns/page
2495	bs3-memalloc-1: Page access time in ticks : 21 843 ticks/page
2496	bs3-memalloc-1: Access thruput : 137 119 pages/s
2497	bs3-memalloc-1: Access thruput in MiBs : 535 MB/s
2498	bs3-memalloc-1: 2nd access : PASSED
2499	bs3-memalloc-1: Access elapsed : 112 963 925 ns
2500	bs3-memalloc-1: Access elapsed in ticks : 338 284 436 ticks
2501	bs3-memalloc-1: Page access time : 9 ns/page
2502	bs3-memalloc-1: Page access time in ticks : 28 ticks/page
2503	bs3-memalloc-1: Access thruput : 103 266 666 pages/s
2504	bs3-memalloc-1: Access thruput in MiBs : 403 385 MB/s
2505	bs3-memalloc-1: 3rd access : PASSED
2506	bs3-memalloc-1: SUCCESS
2507	* @endverbatim
2508	*
2509	* NEM w/ simplified memory and but no MEM_LARGE_PAGES:
2510	* @verbatim
2511	bs3-memalloc-1: From 0x100000000 to 0xc20000000
2512	bs3-memalloc-1: Pages : 11 665 408 pages
2513	bs3-memalloc-1: MiBs : 45 568 MB
2514	bs3-memalloc-1: Alloc elapsed : 90 062 027 900 ns
2515	bs3-memalloc-1: Alloc elapsed in ticks : 269 754 826 466 ticks
2516	bs3-memalloc-1: Page alloc time : 7 720 ns/page
2517	bs3-memalloc-1: Page alloc time in ticks : 23 124 ticks/page
2518	bs3-memalloc-1: Alloc thruput : 129 526 pages/s
2519	bs3-memalloc-1: Alloc thruput in MiBs : 505 MB/s
2520	bs3-memalloc-1: Allocation speed : PASSED
2521	bs3-memalloc-1: Access elapsed : 3 596 017 220 ns
2522	bs3-memalloc-1: Access elapsed in ticks : 10 770 732 620 ticks
2523	bs3-memalloc-1: Page access time : 308 ns/page
2524	bs3-memalloc-1: Page access time in ticks : 923 ticks/page
2525	bs3-memalloc-1: Access thruput : 3 243 980 pages/s
2526	bs3-memalloc-1: Access thruput in MiBs : 12 671 MB/s
2527	bs3-memalloc-1: 2nd access : PASSED
2528	bs3-memalloc-1: Access elapsed : 133 060 160 ns
2529	bs3-memalloc-1: Access elapsed in ticks : 398 459 884 ticks
2530	bs3-memalloc-1: Page access time : 11 ns/page
2531	bs3-memalloc-1: Page access time in ticks : 34 ticks/page
2532	bs3-memalloc-1: Access thruput : 87 670 178 pages/s
2533	bs3-memalloc-1: Access thruput in MiBs : 342 461 MB/s
2534	bs3-memalloc-1: 3rd access : PASSED
2535	* @endverbatim
2536	*
2537	* Same everything but native VT-x and VBox (stripped output a little):
2538	* @verbatim
2539	bs3-memalloc-1: From 0x100000000 to 0xc20000000
2540	bs3-memalloc-1: Pages : 11 665 408 pages
2541	bs3-memalloc-1: MiBs : 45 568 MB
2542	bs3-memalloc-1: Alloc elapsed : 776 111 427 ns
2543	bs3-memalloc-1: Alloc elapsed in ticks : 2 323 267 035 ticks
2544	bs3-memalloc-1: Page alloc time : 66 ns/page
2545	bs3-memalloc-1: Page alloc time in ticks : 199 ticks/page
2546	bs3-memalloc-1: Alloc thruput : 15 030 584 pages/s
2547	bs3-memalloc-1: Alloc thruput in MiBs : 58 713 MB/s
2548	bs3-memalloc-1: Allocation speed : PASSED
2549	bs3-memalloc-1: Access elapsed : 112 141 904 ns
2550	bs3-memalloc-1: Access elapsed in ticks : 335 751 077 ticks
2551	bs3-memalloc-1: Page access time : 9 ns/page
2552	bs3-memalloc-1: Page access time in ticks : 28 ticks/page
2553	bs3-memalloc-1: Access thruput : 104 023 630 pages/s
2554	bs3-memalloc-1: Access thruput in MiBs : 406 342 MB/s
2555	bs3-memalloc-1: 2nd access : PASSED
2556	bs3-memalloc-1: Access elapsed : 112 023 049 ns
2557	bs3-memalloc-1: Access elapsed in ticks : 335 418 343 ticks
2558	bs3-memalloc-1: Page access time : 9 ns/page
2559	bs3-memalloc-1: Page access time in ticks : 28 ticks/page
2560	bs3-memalloc-1: Access thruput : 104 133 998 pages/s
2561	bs3-memalloc-1: Access thruput in MiBs : 406 773 MB/s
2562	bs3-memalloc-1: 3rd access : PASSED
2563	* @endverbatim
2564	*
2565	* VBox with large pages disabled:
2566	* @verbatim
2567	bs3-memalloc-1: From 0x100000000 to 0xc20000000
2568	bs3-memalloc-1: Pages : 11 665 408 pages
2569	bs3-memalloc-1: MiBs : 45 568 MB
2570	bs3-memalloc-1: Alloc elapsed : 50 986 588 028 ns
2571	bs3-memalloc-1: Alloc elapsed in ticks : 152 714 862 044 ticks
2572	bs3-memalloc-1: Page alloc time : 4 370 ns/page
2573	bs3-memalloc-1: Page alloc time in ticks : 13 091 ticks/page
2574	bs3-memalloc-1: Alloc thruput : 228 793 pages/s
2575	bs3-memalloc-1: Alloc thruput in MiBs : 893 MB/s
2576	bs3-memalloc-1: Allocation speed : PASSED
2577	bs3-memalloc-1: Access elapsed : 2 849 641 741 ns
2578	bs3-memalloc-1: Access elapsed in ticks : 8 535 372 249 ticks
2579	bs3-memalloc-1: Page access time : 244 ns/page
2580	bs3-memalloc-1: Page access time in ticks : 731 ticks/page
2581	bs3-memalloc-1: Access thruput : 4 093 640 pages/s
2582	bs3-memalloc-1: Access thruput in MiBs : 15 990 MB/s
2583	bs3-memalloc-1: 2nd access : PASSED
2584	bs3-memalloc-1: Access elapsed : 2 866 960 770 ns
2585	bs3-memalloc-1: Access elapsed in ticks : 8 587 097 799 ticks
2586	bs3-memalloc-1: Page access time : 245 ns/page
2587	bs3-memalloc-1: Page access time in ticks : 736 ticks/page
2588	bs3-memalloc-1: Access thruput : 4 068 910 pages/s
2589	bs3-memalloc-1: Access thruput in MiBs : 15 894 MB/s
2590	bs3-memalloc-1: 3rd access : PASSED
2591	* @endverbatim
2592	*
2593	* Comparing large pages, therer is an allocation speed difference of two order
2594	* of magnitude. When disabling large pages in VBox the allocation numbers are
2595	* closer, and the is clear from the 2nd and 3rd access tests that VBox doesn't
2596	* spend enough memory on nested page tables as Hyper-V does. The similar 2nd
2597	* and 3rd access numbers the two large page testruns seems to hint strongly at
2598	* Hyper-V eventually getting the large pages in place too, only that it sucks
2599	* hundredfold in the setting up phase.
2600	*
2601	*
2602	*
2603	* @section sec_nem_win_impl Our implementation.
2604	*
2605	* We set out with the goal of wanting to run as much as possible in ring-0,
2606	* reasoning that this would give use the best performance.
2607	*
2608	* This goal was approached gradually, starting out with a pure WinHvPlatform
2609	* implementation, gradually replacing parts: register access, guest memory
2610	* handling, running virtual processors. Then finally moving it all into
2611	* ring-0, while keeping most of it configurable so that we could make
2612	* comparisons (see NEMInternal.h and nemR3NativeRunGC()).
2613	*
2614	*
2615	* @subsection subsect_nem_win_impl_ioctl VID.SYS I/O control calls
2616	*
2617	* To run things in ring-0 we need to talk directly to VID.SYS thru its I/O
2618	* control interface. Looking at changes between like build 17083 and 17101 (if
2619	* memory serves) a set of the VID I/O control numbers shifted a little, which
2620	* means we need to determin them dynamically. We currently do this by hooking
2621	* the NtDeviceIoControlFile API call from VID.DLL and snooping up the
2622	* parameters when making dummy calls to relevant APIs. (We could also
2623	* disassemble the relevant APIs and try fish out the information from that, but
2624	* this is way simpler.)
2625	*
2626	* Issuing I/O control calls from ring-0 is facing a small challenge with
2627	* respect to direct buffering. When using direct buffering the device will
2628	* typically check that the buffer is actually in the user address space range
2629	* and reject kernel addresses. Fortunately, we've got the cross context VM
2630	* structure that is mapped into both kernel and user space, it's also locked
2631	* and safe to access from kernel space. So, we place the I/O control buffers
2632	* in the per-CPU part of it (NEMCPU::uIoCtlBuf) and give the driver the user
2633	* address if direct access buffering or kernel address if not.
2634	*
2635	* The I/O control calls are 'abstracted' in the support driver, see
2636	* SUPR0IoCtlSetupForHandle(), SUPR0IoCtlPerform() and SUPR0IoCtlCleanup().
2637	*
2638	*
2639	* @subsection subsect_nem_win_impl_cpumctx CPUMCTX
2640	*
2641	* Since the CPU state needs to live in Hyper-V when executing, we probably
2642	* should not transfer more than necessary when handling VMEXITs. To help us
2643	* manage this CPUMCTX got a new field CPUMCTX::fExtrn that to indicate which
2644	* part of the state is currently externalized (== in Hyper-V).
2645	*
2646	*
2647	* @subsection sec_nem_win_benchmarks Benchmarks.
2648	*
2649	* @subsubsection subsect_nem_win_benchmarks_bs2t1 17134/2018-06-22: Bootsector2-test1
2650	*
2651	* This is ValidationKit/bootsectors/bootsector2-test1.asm as of 2018-06-22
2652	* (internal r123172) running a the release build of VirtualBox from the same
2653	* source, though with exit optimizations disabled. Host is AMD Threadripper 1950X
2654	* running out an up to date 64-bit Windows 10 build 17134.
2655	*
2656	* The base line column is using the official WinHv API for everything but physical
2657	* memory mapping. The 2nd column is the default NEM/win configuration where we
2658	* put the main execution loop in ring-0, using hypercalls when we can and VID for
2659	* managing execution. The 3rd column is regular VirtualBox using AMD-V directly,
2660	* hyper-V is disabled, main execution loop in ring-0.
2661	*
2662	* @verbatim
2663	TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V
2664	32-bit paged protected mode, CPUID : 108 874 ins/sec 113% / 123 602 1198% / 1 305 113
2665	32-bit pae protected mode, CPUID : 106 722 ins/sec 115% / 122 740 1232% / 1 315 201
2666	64-bit long mode, CPUID : 106 798 ins/sec 114% / 122 111 1198% / 1 280 404
2667	16-bit unpaged protected mode, CPUID : 106 835 ins/sec 114% / 121 994 1216% / 1 299 665
2668	32-bit unpaged protected mode, CPUID : 105 257 ins/sec 115% / 121 772 1235% / 1 300 860
2669	real mode, CPUID : 104 507 ins/sec 116% / 121 800 1228% / 1 283 848
2670	CPUID EAX=1 : PASSED
2671	32-bit paged protected mode, RDTSC : 99 581 834 ins/sec 100% / 100 323 307 93% / 93 473 299
2672	32-bit pae protected mode, RDTSC : 99 620 585 ins/sec 100% / 99 960 952 84% / 83 968 839
2673	64-bit long mode, RDTSC : 100 540 009 ins/sec 100% / 100 946 372 93% / 93 652 826
2674	16-bit unpaged protected mode, RDTSC : 99 688 473 ins/sec 100% / 100 097 751 76% / 76 281 287
2675	32-bit unpaged protected mode, RDTSC : 98 385 857 ins/sec 102% / 100 510 404 94% / 93 379 536
2676	real mode, RDTSC : 100 087 967 ins/sec 101% / 101 386 138 93% / 93 234 999
2677	RDTSC : PASSED
2678	32-bit paged protected mode, Read CR4 : 2 156 102 ins/sec 98% / 2 121 967 17114% / 369 009 009
2679	32-bit pae protected mode, Read CR4 : 2 163 820 ins/sec 98% / 2 133 804 17469% / 377 999 261
2680	64-bit long mode, Read CR4 : 2 164 822 ins/sec 98% / 2 128 698 18875% / 408 619 313
2681	16-bit unpaged protected mode, Read CR4 : 2 162 367 ins/sec 100% / 2 168 508 17132% / 370 477 568
2682	32-bit unpaged protected mode, Read CR4 : 2 163 189 ins/sec 100% / 2 169 808 16768% / 362 734 679
2683	real mode, Read CR4 : 2 162 436 ins/sec 100% / 2 164 914 15551% / 336 288 998
2684	Read CR4 : PASSED
2685	real mode, 32-bit IN : 104 649 ins/sec 118% / 123 513 1028% / 1 075 831
2686	real mode, 32-bit OUT : 107 102 ins/sec 115% / 123 660 982% / 1 052 259
2687	real mode, 32-bit IN-to-ring-3 : 105 697 ins/sec 98% / 104 471 201% / 213 216
2688	real mode, 32-bit OUT-to-ring-3 : 105 830 ins/sec 98% / 104 598 198% / 210 495
2689	16-bit unpaged protected mode, 32-bit IN : 104 855 ins/sec 117% / 123 174 1029% / 1 079 591
2690	16-bit unpaged protected mode, 32-bit OUT : 107 529 ins/sec 115% / 124 250 992% / 1 067 053
2691	16-bit unpaged protected mode, 32-bit IN-to-ring-3 : 106 337 ins/sec 103% / 109 565 196% / 209 367
2692	16-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 107 558 ins/sec 100% / 108 237 191% / 206 387
2693	32-bit unpaged protected mode, 32-bit IN : 106 351 ins/sec 116% / 123 584 1016% / 1 081 325
2694	32-bit unpaged protected mode, 32-bit OUT : 106 424 ins/sec 116% / 124 252 995% / 1 059 408
2695	32-bit unpaged protected mode, 32-bit IN-to-ring-3 : 104 035 ins/sec 101% / 105 305 202% / 210 750
2696	32-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 103 831 ins/sec 102% / 106 919 205% / 213 198
2697	32-bit paged protected mode, 32-bit IN : 103 356 ins/sec 119% / 123 870 1041% / 1 076 463
2698	32-bit paged protected mode, 32-bit OUT : 107 177 ins/sec 115% / 124 302 998% / 1 069 655
2699	32-bit paged protected mode, 32-bit IN-to-ring-3 : 104 491 ins/sec 100% / 104 744 200% / 209 264
2700	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 106 603 ins/sec 97% / 103 849 197% / 210 219
2701	32-bit pae protected mode, 32-bit IN : 105 923 ins/sec 115% / 122 759 1041% / 1 103 261
2702	32-bit pae protected mode, 32-bit OUT : 107 083 ins/sec 117% / 126 057 1024% / 1 096 667
2703	32-bit pae protected mode, 32-bit IN-to-ring-3 : 106 114 ins/sec 97% / 103 496 199% / 211 312
2704	32-bit pae protected mode, 32-bit OUT-to-ring-3 : 105 675 ins/sec 96% / 102 096 198% / 209 890
2705	64-bit long mode, 32-bit IN : 105 800 ins/sec 113% / 120 006 1013% / 1 072 116
2706	64-bit long mode, 32-bit OUT : 105 635 ins/sec 113% / 120 375 997% / 1 053 655
2707	64-bit long mode, 32-bit IN-to-ring-3 : 105 274 ins/sec 95% / 100 763 197% / 208 026
2708	64-bit long mode, 32-bit OUT-to-ring-3 : 106 262 ins/sec 94% / 100 749 196% / 209 288
2709	NOP I/O Port Access : PASSED
2710	32-bit paged protected mode, 32-bit read : 57 687 ins/sec 119% / 69 136 1197% / 690 548
2711	32-bit paged protected mode, 32-bit write : 57 957 ins/sec 118% / 68 935 1183% / 685 930
2712	32-bit paged protected mode, 32-bit read-to-ring-3 : 57 958 ins/sec 95% / 55 432 276% / 160 505
2713	32-bit paged protected mode, 32-bit write-to-ring-3 : 57 922 ins/sec 100% / 58 340 304% / 176 464
2714	32-bit pae protected mode, 32-bit read : 57 478 ins/sec 119% / 68 453 1141% / 656 159
2715	32-bit pae protected mode, 32-bit write : 57 226 ins/sec 118% / 68 097 1157% / 662 504
2716	32-bit pae protected mode, 32-bit read-to-ring-3 : 57 582 ins/sec 94% / 54 651 268% / 154 867
2717	32-bit pae protected mode, 32-bit write-to-ring-3 : 57 697 ins/sec 100% / 57 750 299% / 173 030
2718	64-bit long mode, 32-bit read : 57 128 ins/sec 118% / 67 779 1071% / 611 949
2719	64-bit long mode, 32-bit write : 57 127 ins/sec 118% / 67 632 1084% / 619 395
2720	64-bit long mode, 32-bit read-to-ring-3 : 57 181 ins/sec 94% / 54 123 265% / 151 937
2721	64-bit long mode, 32-bit write-to-ring-3 : 57 297 ins/sec 99% / 57 286 294% / 168 694
2722	16-bit unpaged protected mode, 32-bit read : 58 827 ins/sec 118% / 69 545 1185% / 697 602
2723	16-bit unpaged protected mode, 32-bit write : 58 678 ins/sec 118% / 69 442 1183% / 694 387
2724	16-bit unpaged protected mode, 32-bit read-to-ring-3 : 57 841 ins/sec 96% / 55 730 275% / 159 163
2725	16-bit unpaged protected mode, 32-bit write-to-ring-3 : 57 855 ins/sec 101% / 58 834 304% / 176 169
2726	32-bit unpaged protected mode, 32-bit read : 58 063 ins/sec 120% / 69 690 1233% / 716 444
2727	32-bit unpaged protected mode, 32-bit write : 57 936 ins/sec 120% / 69 633 1199% / 694 753
2728	32-bit unpaged protected mode, 32-bit read-to-ring-3 : 58 451 ins/sec 96% / 56 183 273% / 159 972
2729	32-bit unpaged protected mode, 32-bit write-to-ring-3 : 58 962 ins/sec 99% / 58 955 298% / 175 936
2730	real mode, 32-bit read : 58 571 ins/sec 118% / 69 478 1160% / 679 917
2731	real mode, 32-bit write : 58 418 ins/sec 118% / 69 320 1185% / 692 513
2732	real mode, 32-bit read-to-ring-3 : 58 072 ins/sec 96% / 55 751 274% / 159 145
2733	real mode, 32-bit write-to-ring-3 : 57 870 ins/sec 101% / 58 755 307% / 178 042
2734	NOP MMIO Access : PASSED
2735	SUCCESS
2736	* @endverbatim
2737	*
2738	* What we see here is:
2739	*
2740	* - The WinHv API approach is 10 to 12 times slower for exits we can
2741	* handle directly in ring-0 in the VBox AMD-V code.
2742	*
2743	* - The WinHv API approach is 2 to 3 times slower for exits we have to
2744	* go to ring-3 to handle with the VBox AMD-V code.
2745	*
2746	* - By using hypercalls and VID.SYS from ring-0 we gain between
2747	* 13% and 20% over the WinHv API on exits handled in ring-0.
2748	*
2749	* - For exits requiring ring-3 handling are between 6% slower and 3% faster
2750	* than the WinHv API.
2751	*
2752	*
2753	* As a side note, it looks like Hyper-V doesn't let the guest read CR4 but
2754	* triggers exits all the time. This isn't all that important these days since
2755	* OSes like Linux cache the CR4 value specifically to avoid these kinds of exits.
2756	*
2757	*
2758	* @subsubsection subsect_nem_win_benchmarks_bs2t1u1 17134/2018-10-02: Bootsector2-test1
2759	*
2760	* Update on 17134. While expectantly testing a couple of newer builds (17758,
2761	* 17763) hoping for some increases in performance, the numbers turned out
2762	* altogether worse than the June test run. So, we went back to the 1803
2763	* (17134) installation, made sure it was fully up to date (as per 2018-10-02)
2764	* and re-tested.
2765	*
2766	* The numbers had somehow turned significantly worse over the last 3-4 months,
2767	* dropping around 70% for the WinHv API test, more for Hypercalls + VID.
2768	*
2769	* @verbatim
2770	TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V *
2771	32-bit paged protected mode, CPUID : 33 270 ins/sec 33 154
2772	real mode, CPUID : 33 534 ins/sec 32 711
2773	[snip]
2774	32-bit paged protected mode, RDTSC : 102 216 011 ins/sec 98 225 419
2775	real mode, RDTSC : 102 492 243 ins/sec 98 225 419
2776	[snip]
2777	32-bit paged protected mode, Read CR4 : 2 096 165 ins/sec 2 123 815
2778	real mode, Read CR4 : 2 081 047 ins/sec 2 075 151
2779	[snip]
2780	32-bit paged protected mode, 32-bit IN : 32 739 ins/sec 33 655
2781	32-bit paged protected mode, 32-bit OUT : 32 702 ins/sec 33 777
2782	32-bit paged protected mode, 32-bit IN-to-ring-3 : 32 579 ins/sec 29 985
2783	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 32 750 ins/sec 29 757
2784	[snip]
2785	32-bit paged protected mode, 32-bit read : 20 042 ins/sec 21 489
2786	32-bit paged protected mode, 32-bit write : 20 036 ins/sec 21 493
2787	32-bit paged protected mode, 32-bit read-to-ring-3 : 19 985 ins/sec 19 143
2788	32-bit paged protected mode, 32-bit write-to-ring-3 : 19 972 ins/sec 19 595
2789
2790	* @endverbatim
2791	*
2792	* Suspects are security updates and/or microcode updates installed since then.
2793	* Given that the RDTSC and CR4 numbers are reasonably unchanges, it seems that
2794	* the Hyper-V core loop (in hvax64.exe) aren't affected. Our ring-0 runloop
2795	* is equally affected as the ring-3 based runloop, so it cannot be ring
2796	* switching as such (unless the ring-0 loop is borked and we didn't notice yet).
2797	*
2798	* The issue is probably in the thread / process switching area, could be
2799	* something special for hyper-V interrupt delivery or worker thread switching.
2800	*
2801	* Really wish this thread ping-pong going on in VID.SYS could be eliminated!
2802	*
2803	*
2804	* @subsubsection subsect_nem_win_benchmarks_bs2t1u2 17763: Bootsector2-test1
2805	*
2806	* Some preliminary numbers for build 17763 on the 3.4 GHz AMD 1950X, the second
2807	* column will improve we get time to have a look the register page.
2808	*
2809	* There is a 50% performance loss here compared to the June numbers with
2810	* build 17134. The RDTSC numbers hits that it isn't in the Hyper-V core
2811	* (hvax64.exe), but something on the NT side.
2812	*
2813	* Clearing bit 20 in nt!KiSpeculationFeatures speeds things up (i.e. changing
2814	* the dword from 0x00300065 to 0x00200065 in windbg). This is checked by
2815	* nt!KePrepareToDispatchVirtualProcessor, making it a no-op if the flag is
2816	* clear. winhvr!WinHvpVpDispatchLoop call that function before making
2817	* hypercall 0xc2, which presumably does the heavy VCpu lifting in hvcax64.exe.
2818	*
2819	* @verbatim
2820	TESTING... WinHv API Hypercalls + VID clr(bit-20) + WinHv API
2821	32-bit paged protected mode, CPUID : 54 145 ins/sec 51 436 130 076
2822	real mode, CPUID : 54 178 ins/sec 51 713 130 449
2823	[snip]
2824	32-bit paged protected mode, RDTSC : 98 927 639 ins/sec 100 254 552 100 549 882
2825	real mode, RDTSC : 99 601 206 ins/sec 100 886 699 100 470 957
2826	[snip]
2827	32-bit paged protected mode, 32-bit IN : 54 621 ins/sec 51 524 128 294
2828	32-bit paged protected mode, 32-bit OUT : 54 870 ins/sec 51 671 129 397
2829	32-bit paged protected mode, 32-bit IN-to-ring-3 : 54 624 ins/sec 43 964 127 874
2830	32-bit paged protected mode, 32-bit OUT-to-ring-3 : 54 803 ins/sec 44 087 129 443
2831	[snip]
2832	32-bit paged protected mode, 32-bit read : 28 230 ins/sec 34 042 48 113
2833	32-bit paged protected mode, 32-bit write : 27 962 ins/sec 34 050 48 069
2834	32-bit paged protected mode, 32-bit read-to-ring-3 : 27 841 ins/sec 28 397 48 146
2835	32-bit paged protected mode, 32-bit write-to-ring-3 : 27 896 ins/sec 29 455 47 970
2836	* @endverbatim
2837	*
2838	*
2839	* @subsubsection subsect_nem_win_benchmarks_w2k 17134/2018-06-22: Windows 2000 Boot & Shutdown
2840	*
2841	* Timing the startup and automatic shutdown of a Windows 2000 SP4 guest serves
2842	* as a real world benchmark and example of why exit performance is import. When
2843	* Windows 2000 boots up is doing a lot of VGA redrawing of the boot animation,
2844	* which is very costly. Not having installed guest additions leaves it in a VGA
2845	* mode after the bootup sequence is done, keep up the screen access expenses,
2846	* though the graphics driver more economical than the bootvid code.
2847	*
2848	* The VM was configured to automatically logon. A startup script was installed
2849	* to perform the automatic shuting down and powering off the VM (thru
2850	* vts_shutdown.exe -f -p). An offline snapshot of the VM was taken an restored
2851	* before each test run. The test time run time is calculated from the monotonic
2852	* VBox.log timestamps, starting with the state change to 'RUNNING' and stopping
2853	* at 'POWERING_OFF'.
2854	*
2855	* The host OS and VirtualBox build is the same as for the bootsector2-test1
2856	* scenario.
2857	*
2858	* Results:
2859	*
2860	* - WinHv API for all but physical page mappings:
2861	* 32 min 12.19 seconds
2862	*
2863	* - The default NEM/win configuration where we put the main execution loop
2864	* in ring-0, using hypercalls when we can and VID for managing execution:
2865	* 3 min 23.18 seconds
2866	*
2867	* - Regular VirtualBox using AMD-V directly, hyper-V is disabled, main
2868	* execution loop in ring-0:
2869	* 58.09 seconds
2870	*
2871	* - WinHv API with exit history based optimizations:
2872	* 58.66 seconds
2873	*
2874	* - Hypercall + VID.SYS with exit history base optimizations:
2875	* 58.94 seconds
2876	*
2877	* With a well above average machine needing over half an hour for booting a
2878	* nearly 20 year old guest kind of says it all. The 13%-20% exit performance
2879	* increase we get by using hypercalls and VID.SYS directly pays off a lot here.
2880	* The 3m23s is almost acceptable in comparison to the half an hour.
2881	*
2882	* The similarity between the last three results strongly hits at windows 2000
2883	* doing a lot of waiting during boot and shutdown and isn't the best testcase
2884	* once a basic performance level is reached.
2885	*
2886	*
2887	* @subsubsection subsection_iem_win_benchmarks_deb9_nat Debian 9 NAT performance
2888	*
2889	* This benchmark is about network performance over NAT from a 64-bit Debian 9
2890	* VM with a single CPU. For network performance measurements, we use our own
2891	* NetPerf tool (ValidationKit/utils/network/NetPerf.cpp) to measure latency
2892	* and throughput.
2893	*
2894	* The setups, builds and configurations are as in the previous benchmarks
2895	* (release r123172 on 1950X running 64-bit W10/17134 (2016-06-xx). Please note
2896	* that the exit optimizations hasn't yet been in tuned with NetPerf in mind.
2897	*
2898	* The NAT network setup was selected here since it's the default one and the
2899	* slowest one. There is quite a bit of IPC with worker threads and packet
2900	* processing involved.
2901	*
2902	* Latency test is first up. This is a classic back and forth between the two
2903	* NetPerf instances, where the key measurement is the roundrip latency. The
2904	* values here are the lowest result over 3-6 runs.
2905	*
2906	* Against host system:
2907	* - 152 258 ns/roundtrip - 100% - regular VirtualBox SVM
2908	* - 271 059 ns/roundtrip - 178% - Hypercalls + VID.SYS in ring-0 with exit optimizations.
2909	* - 280 149 ns/roundtrip - 184% - Hypercalls + VID.SYS in ring-0
2910	* - 317 735 ns/roundtrip - 209% - Win HV API with exit optimizations.
2911	* - 342 440 ns/roundtrip - 225% - Win HV API
2912	*
2913	* Against a remote Windows 10 system over a 10Gbps link:
2914	* - 243 969 ns/roundtrip - 100% - regular VirtualBox SVM
2915	* - 384 427 ns/roundtrip - 158% - Win HV API with exit optimizations.
2916	* - 402 411 ns/roundtrip - 165% - Hypercalls + VID.SYS in ring-0
2917	* - 406 313 ns/roundtrip - 167% - Win HV API
2918	* - 413 160 ns/roundtrip - 169% - Hypercalls + VID.SYS in ring-0 with exit optimizations.
2919	*
2920	* What we see here is:
2921	*
2922	* - Consistent and signficant latency increase using Hyper-V compared
2923	* to directly harnessing AMD-V ourselves.
2924	*
2925	* - When talking to the host, it's clear that the hypercalls + VID.SYS
2926	* in ring-0 method pays off.
2927	*
2928	* - When talking to a different host, the numbers are closer and it
2929	* is not longer clear which Hyper-V execution method is better.
2930	*
2931	*
2932	* Throughput benchmarks are performed by one side pushing data full throttle
2933	* for 10 seconds (minus a 1 second at each end of the test), then reversing
2934	* the roles and measuring it in the other direction. The tests ran 3-5 times
2935	* and below are the highest and lowest results in each direction.
2936	*
2937	* Receiving from host system:
2938	* - Regular VirtualBox SVM:
2939	* Max: 96 907 549 bytes/s - 100%
2940	* Min: 86 912 095 bytes/s - 100%
2941	* - Hypercalls + VID.SYS in ring-0:
2942	* Max: 84 036 544 bytes/s - 87%
2943	* Min: 64 978 112 bytes/s - 75%
2944	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
2945	* Max: 77 760 699 bytes/s - 80%
2946	* Min: 72 677 171 bytes/s - 84%
2947	* - Win HV API with exit optimizations:
2948	* Max: 64 465 905 bytes/s - 67%
2949	* Min: 62 286 369 bytes/s - 72%
2950	* - Win HV API:
2951	* Max: 62 466 631 bytes/s - 64%
2952	* Min: 61 362 782 bytes/s - 70%
2953	*
2954	* Sending to the host system:
2955	* - Regular VirtualBox SVM:
2956	* Max: 87 728 652 bytes/s - 100%
2957	* Min: 86 923 198 bytes/s - 100%
2958	* - Hypercalls + VID.SYS in ring-0:
2959	* Max: 84 280 749 bytes/s - 96%
2960	* Min: 78 369 842 bytes/s - 90%
2961	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
2962	* Max: 84 119 932 bytes/s - 96%
2963	* Min: 77 396 811 bytes/s - 89%
2964	* - Win HV API:
2965	* Max: 81 714 377 bytes/s - 93%
2966	* Min: 78 697 419 bytes/s - 91%
2967	* - Win HV API with exit optimizations:
2968	* Max: 80 502 488 bytes/s - 91%
2969	* Min: 71 164 978 bytes/s - 82%
2970	*
2971	* Receiving from a remote Windows 10 system over a 10Gbps link:
2972	* - Hypercalls + VID.SYS in ring-0:
2973	* Max: 115 346 922 bytes/s - 136%
2974	* Min: 112 912 035 bytes/s - 137%
2975	* - Regular VirtualBox SVM:
2976	* Max: 84 517 504 bytes/s - 100%
2977	* Min: 82 597 049 bytes/s - 100%
2978	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
2979	* Max: 77 736 251 bytes/s - 92%
2980	* Min: 73 813 784 bytes/s - 89%
2981	* - Win HV API with exit optimizations:
2982	* Max: 63 035 587 bytes/s - 75%
2983	* Min: 57 538 380 bytes/s - 70%
2984	* - Win HV API:
2985	* Max: 62 279 185 bytes/s - 74%
2986	* Min: 56 813 866 bytes/s - 69%
2987	*
2988	* Sending to a remote Windows 10 system over a 10Gbps link:
2989	* - Win HV API with exit optimizations:
2990	* Max: 116 502 357 bytes/s - 103%
2991	* Min: 49 046 550 bytes/s - 59%
2992	* - Regular VirtualBox SVM:
2993	* Max: 113 030 991 bytes/s - 100%
2994	* Min: 83 059 511 bytes/s - 100%
2995	* - Hypercalls + VID.SYS in ring-0:
2996	* Max: 106 435 031 bytes/s - 94%
2997	* Min: 47 253 510 bytes/s - 57%
2998	* - Hypercalls + VID.SYS in ring-0 with exit optimizations:
2999	* Max: 94 842 287 bytes/s - 84%
3000	* Min: 68 362 172 bytes/s - 82%
3001	* - Win HV API:
3002	* Max: 65 165 225 bytes/s - 58%
3003	* Min: 47 246 573 bytes/s - 57%
3004	*
3005	* What we see here is:
3006	*
3007	* - Again consistent numbers when talking to the host. Showing that the
3008	* ring-0 approach is preferable to the ring-3 one.
3009	*
3010	* - Again when talking to a remote host, things get more difficult to
3011	* make sense of. The spread is larger and direct AMD-V gets beaten by
3012	* a different the Hyper-V approaches in each direction.
3013	*
3014	* - However, if we treat the first entry (remote host) as weird spikes, the
3015	* other entries are consistently worse compared to direct AMD-V. For the
3016	* send case we get really bad results for WinHV.
3017	*
3018	*/
3019

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

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