/* $Id: NEMR3Native-win.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @file * NEM - Native execution manager, native ring-3 Windows backend. * * Log group 2: Exit logging. * Log group 3: Log context on exit. * Log group 5: Ring-3 memory management * Log group 6: Ring-0 memory management * Log group 12: API intercepts. */ /* * Copyright (C) 2018-2019 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_NEM #define VMCPU_INCL_CPUM_GST_CTX #include #include #include #include #ifndef _WIN32_WINNT_WIN10 # error "Missing _WIN32_WINNT_WIN10" #endif #ifndef _WIN32_WINNT_WIN10_RS1 /* Missing define, causing trouble for us. */ # define _WIN32_WINNT_WIN10_RS1 (_WIN32_WINNT_WIN10 + 1) #endif #include #include #include #include #include /* no api header for this. */ #include #include #include #include #include #include #include "NEMInternal.h" #include #include #include #include #include #include /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ #ifdef LOG_ENABLED # define NEM_WIN_INTERCEPT_NT_IO_CTLS #endif /** VID I/O control detection: Fake partition handle input. */ #define NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE ((HANDLE)(uintptr_t)38479125) /** VID I/O control detection: Fake partition ID return. */ #define NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID UINT64_C(0xfa1e000042424242) /** VID I/O control detection: Fake CPU index input. */ #define NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX UINT32_C(42) /** VID I/O control detection: Fake timeout input. */ #define NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT UINT32_C(0x00080286) /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** @name APIs imported from WinHvPlatform.dll * @{ */ static decltype(WHvGetCapability) * g_pfnWHvGetCapability; static decltype(WHvCreatePartition) * g_pfnWHvCreatePartition; static decltype(WHvSetupPartition) * g_pfnWHvSetupPartition; static decltype(WHvDeletePartition) * g_pfnWHvDeletePartition; static decltype(WHvGetPartitionProperty) * g_pfnWHvGetPartitionProperty; static decltype(WHvSetPartitionProperty) * g_pfnWHvSetPartitionProperty; static decltype(WHvMapGpaRange) * g_pfnWHvMapGpaRange; static decltype(WHvUnmapGpaRange) * g_pfnWHvUnmapGpaRange; static decltype(WHvTranslateGva) * g_pfnWHvTranslateGva; #ifndef NEM_WIN_USE_OUR_OWN_RUN_API static decltype(WHvCreateVirtualProcessor) * g_pfnWHvCreateVirtualProcessor; static decltype(WHvDeleteVirtualProcessor) * g_pfnWHvDeleteVirtualProcessor; static decltype(WHvRunVirtualProcessor) * g_pfnWHvRunVirtualProcessor; static decltype(WHvCancelRunVirtualProcessor) * g_pfnWHvCancelRunVirtualProcessor; static decltype(WHvGetVirtualProcessorRegisters) * g_pfnWHvGetVirtualProcessorRegisters; static decltype(WHvSetVirtualProcessorRegisters) * g_pfnWHvSetVirtualProcessorRegisters; #endif /** @} */ /** @name APIs imported from Vid.dll * @{ */ static decltype(VidGetHvPartitionId) *g_pfnVidGetHvPartitionId; static decltype(VidStartVirtualProcessor) *g_pfnVidStartVirtualProcessor; static decltype(VidStopVirtualProcessor) *g_pfnVidStopVirtualProcessor; static decltype(VidMessageSlotMap) *g_pfnVidMessageSlotMap; static decltype(VidMessageSlotHandleAndGetNext) *g_pfnVidMessageSlotHandleAndGetNext; #ifdef LOG_ENABLED static decltype(VidGetVirtualProcessorState) *g_pfnVidGetVirtualProcessorState; static decltype(VidSetVirtualProcessorState) *g_pfnVidSetVirtualProcessorState; static decltype(VidGetVirtualProcessorRunningStatus) *g_pfnVidGetVirtualProcessorRunningStatus; #endif /** @} */ /** The Windows build number. */ static uint32_t g_uBuildNo = 17134; /** * Import instructions. */ static const struct { uint8_t idxDll; /**< 0 for WinHvPlatform.dll, 1 for vid.dll. */ bool fOptional; /**< Set if import is optional. */ PFNRT *ppfn; /**< The function pointer variable. */ const char *pszName; /**< The function name. */ } g_aImports[] = { #define NEM_WIN_IMPORT(a_idxDll, a_fOptional, a_Name) { (a_idxDll), (a_fOptional), (PFNRT *)&RT_CONCAT(g_pfn,a_Name), #a_Name } NEM_WIN_IMPORT(0, false, WHvGetCapability), NEM_WIN_IMPORT(0, false, WHvCreatePartition), NEM_WIN_IMPORT(0, false, WHvSetupPartition), NEM_WIN_IMPORT(0, false, WHvDeletePartition), NEM_WIN_IMPORT(0, false, WHvGetPartitionProperty), NEM_WIN_IMPORT(0, false, WHvSetPartitionProperty), NEM_WIN_IMPORT(0, false, WHvMapGpaRange), NEM_WIN_IMPORT(0, false, WHvUnmapGpaRange), NEM_WIN_IMPORT(0, false, WHvTranslateGva), #ifndef NEM_WIN_USE_OUR_OWN_RUN_API NEM_WIN_IMPORT(0, false, WHvCreateVirtualProcessor), NEM_WIN_IMPORT(0, false, WHvDeleteVirtualProcessor), NEM_WIN_IMPORT(0, false, WHvRunVirtualProcessor), NEM_WIN_IMPORT(0, false, WHvCancelRunVirtualProcessor), NEM_WIN_IMPORT(0, false, WHvGetVirtualProcessorRegisters), NEM_WIN_IMPORT(0, false, WHvSetVirtualProcessorRegisters), #endif NEM_WIN_IMPORT(1, false, VidGetHvPartitionId), NEM_WIN_IMPORT(1, false, VidMessageSlotMap), NEM_WIN_IMPORT(1, false, VidMessageSlotHandleAndGetNext), NEM_WIN_IMPORT(1, false, VidStartVirtualProcessor), NEM_WIN_IMPORT(1, false, VidStopVirtualProcessor), #ifdef LOG_ENABLED NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorState), NEM_WIN_IMPORT(1, false, VidSetVirtualProcessorState), NEM_WIN_IMPORT(1, false, VidGetVirtualProcessorRunningStatus), #endif #undef NEM_WIN_IMPORT }; /** The real NtDeviceIoControlFile API in NTDLL. */ static decltype(NtDeviceIoControlFile) *g_pfnNtDeviceIoControlFile; /** Pointer to the NtDeviceIoControlFile import table entry. */ static decltype(NtDeviceIoControlFile) **g_ppfnVidNtDeviceIoControlFile; /** Info about the VidGetHvPartitionId I/O control interface. */ static NEMWINIOCTL g_IoCtlGetHvPartitionId; /** Info about the VidStartVirtualProcessor I/O control interface. */ static NEMWINIOCTL g_IoCtlStartVirtualProcessor; /** Info about the VidStopVirtualProcessor I/O control interface. */ static NEMWINIOCTL g_IoCtlStopVirtualProcessor; /** Info about the VidMessageSlotHandleAndGetNext I/O control interface. */ static NEMWINIOCTL g_IoCtlMessageSlotHandleAndGetNext; #ifdef LOG_ENABLED /** Info about the VidMessageSlotMap I/O control interface - for logging. */ static NEMWINIOCTL g_IoCtlMessageSlotMap; /* Info about the VidGetVirtualProcessorState I/O control interface - for logging. */ static NEMWINIOCTL g_IoCtlGetVirtualProcessorState; /* Info about the VidSetVirtualProcessorState I/O control interface - for logging. */ static NEMWINIOCTL g_IoCtlSetVirtualProcessorState; /** Pointer to what nemR3WinIoctlDetector_ForLogging should fill in. */ static NEMWINIOCTL *g_pIoCtlDetectForLogging; #endif #ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS /** Mapping slot for CPU #0. * @{ */ static VID_MESSAGE_MAPPING_HEADER *g_pMsgSlotMapping = NULL; static const HV_MESSAGE_HEADER *g_pHvMsgHdr; static const HV_X64_INTERCEPT_MESSAGE_HEADER *g_pX64MsgHdr; /** @} */ #endif /* * Let the preprocessor alias the APIs to import variables for better autocompletion. */ #ifndef IN_SLICKEDIT # define WHvGetCapability g_pfnWHvGetCapability # define WHvCreatePartition g_pfnWHvCreatePartition # define WHvSetupPartition g_pfnWHvSetupPartition # define WHvDeletePartition g_pfnWHvDeletePartition # define WHvGetPartitionProperty g_pfnWHvGetPartitionProperty # define WHvSetPartitionProperty g_pfnWHvSetPartitionProperty # define WHvMapGpaRange g_pfnWHvMapGpaRange # define WHvUnmapGpaRange g_pfnWHvUnmapGpaRange # define WHvTranslateGva g_pfnWHvTranslateGva # define WHvCreateVirtualProcessor g_pfnWHvCreateVirtualProcessor # define WHvDeleteVirtualProcessor g_pfnWHvDeleteVirtualProcessor # define WHvRunVirtualProcessor g_pfnWHvRunVirtualProcessor # define WHvGetRunExitContextSize g_pfnWHvGetRunExitContextSize # define WHvCancelRunVirtualProcessor g_pfnWHvCancelRunVirtualProcessor # define WHvGetVirtualProcessorRegisters g_pfnWHvGetVirtualProcessorRegisters # define WHvSetVirtualProcessorRegisters g_pfnWHvSetVirtualProcessorRegisters # define VidMessageSlotHandleAndGetNext g_pfnVidMessageSlotHandleAndGetNext # define VidStartVirtualProcessor g_pfnVidStartVirtualProcessor # define VidStopVirtualProcessor g_pfnVidStopVirtualProcessor #endif /** WHV_MEMORY_ACCESS_TYPE names */ static const char * const g_apszWHvMemAccesstypes[4] = { "read", "write", "exec", "!undefined!" }; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ /* * Instantate the code we share with ring-0. */ #ifdef NEM_WIN_USE_OUR_OWN_RUN_API # define NEM_WIN_TEMPLATE_MODE_OWN_RUN_API #else # undef NEM_WIN_TEMPLATE_MODE_OWN_RUN_API #endif #include "../VMMAll/NEMAllNativeTemplate-win.cpp.h" #ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS /** * Wrapper that logs the call from VID.DLL. * * This is very handy for figuring out why an API call fails. */ static NTSTATUS WINAPI nemR3WinLogWrapper_NtDeviceIoControlFile(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { char szFunction[32]; const char *pszFunction; if (uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction) pszFunction = "VidMessageSlotHandleAndGetNext"; else if (uFunction == g_IoCtlStartVirtualProcessor.uFunction) pszFunction = "VidStartVirtualProcessor"; else if (uFunction == g_IoCtlStopVirtualProcessor.uFunction) pszFunction = "VidStopVirtualProcessor"; else if (uFunction == g_IoCtlMessageSlotMap.uFunction) pszFunction = "VidMessageSlotMap"; else if (uFunction == g_IoCtlGetVirtualProcessorState.uFunction) pszFunction = "VidGetVirtualProcessorState"; else if (uFunction == g_IoCtlSetVirtualProcessorState.uFunction) pszFunction = "VidSetVirtualProcessorState"; else { RTStrPrintf(szFunction, sizeof(szFunction), "%#x", uFunction); pszFunction = szFunction; } if (cbInput > 0 && pvInput) Log12(("VID!NtDeviceIoControlFile: %s/input: %.*Rhxs\n", pszFunction, RT_MIN(cbInput, 32), pvInput)); NTSTATUS rcNt = g_pfnNtDeviceIoControlFile(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, uFunction, pvInput, cbInput, pvOutput, cbOutput); if (!hEvt && !pfnApcCallback && !pvApcCtx) 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", hFile, pIos, pIos->Status, pIos->Information, pszFunction, pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress())); else 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", hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, pIos->Status, pIos->Information, pszFunction, pvInput, cbInput, pvOutput, cbOutput, rcNt, ASMReturnAddress())); if (cbOutput > 0 && pvOutput) { Log12(("VID!NtDeviceIoControlFile: %s/output: %.*Rhxs\n", pszFunction, RT_MIN(cbOutput, 32), pvOutput)); if (uFunction == 0x2210cc && g_pMsgSlotMapping == NULL && cbOutput >= sizeof(void *)) { g_pMsgSlotMapping = *(VID_MESSAGE_MAPPING_HEADER **)pvOutput; g_pHvMsgHdr = (const HV_MESSAGE_HEADER *)(g_pMsgSlotMapping + 1); g_pX64MsgHdr = (const HV_X64_INTERCEPT_MESSAGE_HEADER *)(g_pHvMsgHdr + 1); Log12(("VID!NtDeviceIoControlFile: Message slot mapping: %p\n", g_pMsgSlotMapping)); } } if ( g_pMsgSlotMapping && ( uFunction == g_IoCtlMessageSlotHandleAndGetNext.uFunction || uFunction == g_IoCtlStopVirtualProcessor.uFunction || uFunction == g_IoCtlMessageSlotMap.uFunction )) Log12(("VID!NtDeviceIoControlFile: enmVidMsgType=%#x cb=%#x msg=%#x payload=%u cs:rip=%04x:%08RX64 (%s)\n", g_pMsgSlotMapping->enmVidMsgType, g_pMsgSlotMapping->cbMessage, g_pHvMsgHdr->MessageType, g_pHvMsgHdr->PayloadSize, g_pX64MsgHdr->CsSegment.Selector, g_pX64MsgHdr->Rip, pszFunction)); return rcNt; } #endif /* NEM_WIN_INTERCEPT_NT_IO_CTLS */ /** * Patches the call table of VID.DLL so we can intercept NtDeviceIoControlFile. * * This is for used to figure out the I/O control codes and in logging builds * for logging API calls that WinHvPlatform.dll does. * * @returns VBox status code. * @param hLdrModVid The VID module handle. * @param pErrInfo Where to return additional error information. */ static int nemR3WinInitVidIntercepts(RTLDRMOD hLdrModVid, PRTERRINFO pErrInfo) { /* * Locate the real API. */ g_pfnNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) *)RTLdrGetSystemSymbol("NTDLL.DLL", "NtDeviceIoControlFile"); AssertReturn(g_pfnNtDeviceIoControlFile != NULL, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to resolve NtDeviceIoControlFile from NTDLL.DLL")); /* * Locate the PE header and get what we need from it. */ uint8_t const *pbImage = (uint8_t const *)RTLdrGetNativeHandle(hLdrModVid); IMAGE_DOS_HEADER const *pMzHdr = (IMAGE_DOS_HEADER const *)pbImage; AssertReturn(pMzHdr->e_magic == IMAGE_DOS_SIGNATURE, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL mapping doesn't start with MZ signature: %#x", pMzHdr->e_magic)); IMAGE_NT_HEADERS const *pNtHdrs = (IMAGE_NT_HEADERS const *)&pbImage[pMzHdr->e_lfanew]; AssertReturn(pNtHdrs->Signature == IMAGE_NT_SIGNATURE, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL has invalid PE signaturre: %#x @%#x", pNtHdrs->Signature, pMzHdr->e_lfanew)); uint32_t const cbImage = pNtHdrs->OptionalHeader.SizeOfImage; IMAGE_DATA_DIRECTORY const ImportDir = pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; /* * Walk the import descriptor table looking for NTDLL.DLL. */ AssertReturn( ImportDir.Size > 0 && ImportDir.Size < cbImage, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory size: %#x", ImportDir.Size)); AssertReturn( ImportDir.VirtualAddress > 0 && ImportDir.VirtualAddress <= cbImage - ImportDir.Size, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory RVA: %#x", ImportDir.VirtualAddress)); for (PIMAGE_IMPORT_DESCRIPTOR pImps = (PIMAGE_IMPORT_DESCRIPTOR)&pbImage[ImportDir.VirtualAddress]; pImps->Name != 0 && pImps->FirstThunk != 0; pImps++) { AssertReturn(pImps->Name < cbImage, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad import directory entry name: %#x", pImps->Name)); const char *pszModName = (const char *)&pbImage[pImps->Name]; if (RTStrICmpAscii(pszModName, "ntdll.dll")) continue; AssertReturn(pImps->FirstThunk < cbImage, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk)); AssertReturn(pImps->OriginalFirstThunk < cbImage, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk)); /* * Walk the thunks table(s) looking for NtDeviceIoControlFile. */ PIMAGE_THUNK_DATA pFirstThunk = (PIMAGE_THUNK_DATA)&pbImage[pImps->FirstThunk]; /* update this. */ PIMAGE_THUNK_DATA pThunk = pImps->OriginalFirstThunk == 0 /* read from this. */ ? (PIMAGE_THUNK_DATA)&pbImage[pImps->FirstThunk] : (PIMAGE_THUNK_DATA)&pbImage[pImps->OriginalFirstThunk]; while (pThunk->u1.Ordinal != 0) { if (!(pThunk->u1.Ordinal & IMAGE_ORDINAL_FLAG32)) { AssertReturn(pThunk->u1.Ordinal > 0 && pThunk->u1.Ordinal < cbImage, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "VID.DLL bad FirstThunk: %#x", pImps->FirstThunk)); const char *pszSymbol = (const char *)&pbImage[(uintptr_t)pThunk->u1.AddressOfData + 2]; if (strcmp(pszSymbol, "NtDeviceIoControlFile") == 0) { DWORD fOldProt = PAGE_READONLY; VirtualProtect(&pFirstThunk->u1.Function, sizeof(uintptr_t), PAGE_EXECUTE_READWRITE, &fOldProt); g_ppfnVidNtDeviceIoControlFile = (decltype(NtDeviceIoControlFile) **)&pFirstThunk->u1.Function; /* Don't restore the protection here, so we modify the NtDeviceIoControlFile pointer later. */ } } pThunk++; pFirstThunk++; } } if (*g_ppfnVidNtDeviceIoControlFile) { #ifdef NEM_WIN_INTERCEPT_NT_IO_CTLS *g_ppfnVidNtDeviceIoControlFile = nemR3WinLogWrapper_NtDeviceIoControlFile; #endif return VINF_SUCCESS; } return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Failed to patch NtDeviceIoControlFile import in VID.DLL!"); } /** * Worker for nemR3NativeInit that probes and load the native API. * * @returns VBox status code. * @param fForced Whether the HMForced flag is set and we should * fail if we cannot initialize. * @param pErrInfo Where to always return error info. */ static int nemR3WinInitProbeAndLoad(bool fForced, PRTERRINFO pErrInfo) { /* * Check that the DLL files we need are present, but without loading them. * We'd like to avoid loading them unnecessarily. */ WCHAR wszPath[MAX_PATH + 64]; UINT cwcPath = GetSystemDirectoryW(wszPath, MAX_PATH); if (cwcPath >= MAX_PATH || cwcPath < 2) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "GetSystemDirectoryW failed (%#x / %u)", cwcPath, GetLastError()); if (wszPath[cwcPath - 1] != '\\' || wszPath[cwcPath - 1] != '/') wszPath[cwcPath++] = '\\'; RTUtf16CopyAscii(&wszPath[cwcPath], RT_ELEMENTS(wszPath) - cwcPath, "WinHvPlatform.dll"); if (GetFileAttributesW(wszPath) == INVALID_FILE_ATTRIBUTES) return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "The native API dll was not found (%ls)", wszPath); /* * Check that we're in a VM and that the hypervisor identifies itself as Hyper-V. */ if (!ASMHasCpuId()) return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID support"); if (!ASMIsValidStdRange(ASMCpuId_EAX(0))) return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "No CPUID leaf #1"); if (!(ASMCpuId_ECX(1) & X86_CPUID_FEATURE_ECX_HVP)) return RTErrInfoSet(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Not in a hypervisor partition (HVP=0)"); uint32_t cMaxHyperLeaf = 0; uint32_t uEbx = 0; uint32_t uEcx = 0; uint32_t uEdx = 0; ASMCpuIdExSlow(0x40000000, 0, 0, 0, &cMaxHyperLeaf, &uEbx, &uEcx, &uEdx); if (!ASMIsValidHypervisorRange(cMaxHyperLeaf)) return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Invalid hypervisor CPUID range (%#x %#x %#x %#x)", cMaxHyperLeaf, uEbx, uEcx, uEdx); if ( uEbx != UINT32_C(0x7263694d) /* Micr */ || uEcx != UINT32_C(0x666f736f) /* osof */ || uEdx != UINT32_C(0x76482074) /* t Hv */) return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Not Hyper-V CPUID signature: %#x %#x %#x (expected %#x %#x %#x)", uEbx, uEcx, uEdx, UINT32_C(0x7263694d), UINT32_C(0x666f736f), UINT32_C(0x76482074)); if (cMaxHyperLeaf < UINT32_C(0x40000005)) return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "Too narrow hypervisor CPUID range (%#x)", cMaxHyperLeaf); /** @todo would be great if we could recognize a root partition from the * CPUID info, but I currently don't dare do that. */ /* * Now try load the DLLs and resolve the APIs. */ static const char * const s_apszDllNames[2] = { "WinHvPlatform.dll", "vid.dll" }; RTLDRMOD ahMods[2] = { NIL_RTLDRMOD, NIL_RTLDRMOD }; int rc = VINF_SUCCESS; for (unsigned i = 0; i < RT_ELEMENTS(s_apszDllNames); i++) { int rc2 = RTLdrLoadSystem(s_apszDllNames[i], true /*fNoUnload*/, &ahMods[i]); if (RT_FAILURE(rc2)) { if (!RTErrInfoIsSet(pErrInfo)) RTErrInfoSetF(pErrInfo, rc2, "Failed to load API DLL: %s: %Rrc", s_apszDllNames[i], rc2); else RTErrInfoAddF(pErrInfo, rc2, "; %s: %Rrc", s_apszDllNames[i], rc2); ahMods[i] = NIL_RTLDRMOD; rc = VERR_NEM_INIT_FAILED; } } if (RT_SUCCESS(rc)) rc = nemR3WinInitVidIntercepts(ahMods[1], pErrInfo); if (RT_SUCCESS(rc)) { for (unsigned i = 0; i < RT_ELEMENTS(g_aImports); i++) { int rc2 = RTLdrGetSymbol(ahMods[g_aImports[i].idxDll], g_aImports[i].pszName, (void **)g_aImports[i].ppfn); if (RT_FAILURE(rc2)) { *g_aImports[i].ppfn = NULL; LogRel(("NEM: %s: Failed to import %s!%s: %Rrc", g_aImports[i].fOptional ? "info" : fForced ? "fatal" : "error", s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName, rc2)); if (!g_aImports[i].fOptional) { if (RTErrInfoIsSet(pErrInfo)) RTErrInfoAddF(pErrInfo, rc2, ", %s!%s", s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName); else rc = RTErrInfoSetF(pErrInfo, rc2, "Failed to import: %s!%s", s_apszDllNames[g_aImports[i].idxDll], g_aImports[i].pszName); Assert(RT_FAILURE(rc)); } } } if (RT_SUCCESS(rc)) { Assert(!RTErrInfoIsSet(pErrInfo)); } } for (unsigned i = 0; i < RT_ELEMENTS(ahMods); i++) RTLdrClose(ahMods[i]); return rc; } /** * Wrapper for different WHvGetCapability signatures. */ DECLINLINE(HRESULT) WHvGetCapabilityWrapper(WHV_CAPABILITY_CODE enmCap, WHV_CAPABILITY *pOutput, uint32_t cbOutput) { return g_pfnWHvGetCapability(enmCap, pOutput, cbOutput, NULL); } /** * Worker for nemR3NativeInit that gets the hypervisor capabilities. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pErrInfo Where to always return error info. */ static int nemR3WinInitCheckCapabilities(PVM pVM, PRTERRINFO pErrInfo) { #define NEM_LOG_REL_CAP_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %-38s= " a_szFmt "\n", a_szField, a_Value)) #define NEM_LOG_REL_CAP_SUB_EX(a_szField, a_szFmt, a_Value) LogRel(("NEM: %36s: " a_szFmt "\n", a_szField, a_Value)) #define NEM_LOG_REL_CAP_SUB(a_szField, a_Value) NEM_LOG_REL_CAP_SUB_EX(a_szField, "%d", a_Value) /* * Is the hypervisor present with the desired capability? * * In build 17083 this translates into: * - CPUID[0x00000001].HVP is set * - CPUID[0x40000000] == "Microsoft Hv" * - CPUID[0x40000001].eax == "Hv#1" * - CPUID[0x40000003].ebx[12] is set. * - VidGetExoPartitionProperty(INVALID_HANDLE_VALUE, 0x60000, &Ignored) returns * a non-zero value. */ /** * @todo Someone at Microsoft please explain weird API design: * 1. Pointless CapabilityCode duplication int the output; * 2. No output size. */ WHV_CAPABILITY Caps; RT_ZERO(Caps); SetLastError(0); HRESULT hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeHypervisorPresent, &Caps, sizeof(Caps)); DWORD rcWin = GetLastError(); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeHypervisorPresent failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); if (!Caps.HypervisorPresent) { if (!RTPathExists(RTPATH_NT_PASSTHRU_PREFIX "Device\\VidExo")) return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "WHvCapabilityCodeHypervisorPresent is FALSE! Make sure you have enabled the 'Windows Hypervisor Platform' feature."); return RTErrInfoSetF(pErrInfo, VERR_NEM_NOT_AVAILABLE, "WHvCapabilityCodeHypervisorPresent is FALSE! (%u)", rcWin); } LogRel(("NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...\n")); /* * Check what extended VM exits are supported. */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExtendedVmExits, &Caps, sizeof(Caps)); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeExtendedVmExits failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); NEM_LOG_REL_CAP_EX("WHvCapabilityCodeExtendedVmExits", "%'#018RX64", Caps.ExtendedVmExits.AsUINT64); pVM->nem.s.fExtendedMsrExit = RT_BOOL(Caps.ExtendedVmExits.X64MsrExit); pVM->nem.s.fExtendedCpuIdExit = RT_BOOL(Caps.ExtendedVmExits.X64CpuidExit); pVM->nem.s.fExtendedXcptExit = RT_BOOL(Caps.ExtendedVmExits.ExceptionExit); NEM_LOG_REL_CAP_SUB("fExtendedMsrExit", pVM->nem.s.fExtendedMsrExit); NEM_LOG_REL_CAP_SUB("fExtendedCpuIdExit", pVM->nem.s.fExtendedCpuIdExit); NEM_LOG_REL_CAP_SUB("fExtendedXcptExit", pVM->nem.s.fExtendedXcptExit); if (Caps.ExtendedVmExits.AsUINT64 & ~(uint64_t)7) LogRel(("NEM: Warning! Unknown VM exit definitions: %#RX64\n", Caps.ExtendedVmExits.AsUINT64)); /** @todo RECHECK: WHV_EXTENDED_VM_EXITS typedef. */ /* * Check features in case they end up defining any. */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeFeatures, &Caps, sizeof(Caps)); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeFeatures failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); if (Caps.Features.AsUINT64 & ~(uint64_t)0) LogRel(("NEM: Warning! Unknown feature definitions: %#RX64\n", Caps.Features.AsUINT64)); /** @todo RECHECK: WHV_CAPABILITY_FEATURES typedef. */ /* * Check supported exception exit bitmap bits. * We don't currently require this, so we just log failure. */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeExceptionExitBitmap, &Caps, sizeof(Caps)); if (SUCCEEDED(hrc)) LogRel(("NEM: Supported exception exit bitmap: %#RX64\n", Caps.ExceptionExitBitmap)); else LogRel(("NEM: Warning! WHvGetCapability/WHvCapabilityCodeExceptionExitBitmap failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue())); /* * Check that the CPU vendor is supported. */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorVendor, &Caps, sizeof(Caps)); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeProcessorVendor failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); switch (Caps.ProcessorVendor) { /** @todo RECHECK: WHV_PROCESSOR_VENDOR typedef. */ case WHvProcessorVendorIntel: NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - Intel", Caps.ProcessorVendor); pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_INTEL; break; case WHvProcessorVendorAmd: NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d - AMD", Caps.ProcessorVendor); pVM->nem.s.enmCpuVendor = CPUMCPUVENDOR_AMD; break; default: NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorVendor", "%d", Caps.ProcessorVendor); return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unknown processor vendor: %d", Caps.ProcessorVendor); } /* * CPU features, guessing these are virtual CPU features? */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorFeatures, &Caps, sizeof(Caps)); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeProcessorFeatures failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorFeatures", "%'#018RX64", Caps.ProcessorFeatures.AsUINT64); #define NEM_LOG_REL_CPU_FEATURE(a_Field) NEM_LOG_REL_CAP_SUB(#a_Field, Caps.ProcessorFeatures.a_Field) NEM_LOG_REL_CPU_FEATURE(Sse3Support); NEM_LOG_REL_CPU_FEATURE(LahfSahfSupport); NEM_LOG_REL_CPU_FEATURE(Ssse3Support); NEM_LOG_REL_CPU_FEATURE(Sse4_1Support); NEM_LOG_REL_CPU_FEATURE(Sse4_2Support); NEM_LOG_REL_CPU_FEATURE(Sse4aSupport); NEM_LOG_REL_CPU_FEATURE(XopSupport); NEM_LOG_REL_CPU_FEATURE(PopCntSupport); NEM_LOG_REL_CPU_FEATURE(Cmpxchg16bSupport); NEM_LOG_REL_CPU_FEATURE(Altmovcr8Support); NEM_LOG_REL_CPU_FEATURE(LzcntSupport); NEM_LOG_REL_CPU_FEATURE(MisAlignSseSupport); NEM_LOG_REL_CPU_FEATURE(MmxExtSupport); NEM_LOG_REL_CPU_FEATURE(Amd3DNowSupport); NEM_LOG_REL_CPU_FEATURE(ExtendedAmd3DNowSupport); NEM_LOG_REL_CPU_FEATURE(Page1GbSupport); NEM_LOG_REL_CPU_FEATURE(AesSupport); NEM_LOG_REL_CPU_FEATURE(PclmulqdqSupport); NEM_LOG_REL_CPU_FEATURE(PcidSupport); NEM_LOG_REL_CPU_FEATURE(Fma4Support); NEM_LOG_REL_CPU_FEATURE(F16CSupport); NEM_LOG_REL_CPU_FEATURE(RdRandSupport); NEM_LOG_REL_CPU_FEATURE(RdWrFsGsSupport); NEM_LOG_REL_CPU_FEATURE(SmepSupport); NEM_LOG_REL_CPU_FEATURE(EnhancedFastStringSupport); NEM_LOG_REL_CPU_FEATURE(Bmi1Support); NEM_LOG_REL_CPU_FEATURE(Bmi2Support); /* two reserved bits here, see below */ NEM_LOG_REL_CPU_FEATURE(MovbeSupport); NEM_LOG_REL_CPU_FEATURE(Npiep1Support); NEM_LOG_REL_CPU_FEATURE(DepX87FPUSaveSupport); NEM_LOG_REL_CPU_FEATURE(RdSeedSupport); NEM_LOG_REL_CPU_FEATURE(AdxSupport); NEM_LOG_REL_CPU_FEATURE(IntelPrefetchSupport); NEM_LOG_REL_CPU_FEATURE(SmapSupport); NEM_LOG_REL_CPU_FEATURE(HleSupport); NEM_LOG_REL_CPU_FEATURE(RtmSupport); NEM_LOG_REL_CPU_FEATURE(RdtscpSupport); NEM_LOG_REL_CPU_FEATURE(ClflushoptSupport); NEM_LOG_REL_CPU_FEATURE(ClwbSupport); NEM_LOG_REL_CPU_FEATURE(ShaSupport); NEM_LOG_REL_CPU_FEATURE(X87PointersSavedSupport); #undef NEM_LOG_REL_CPU_FEATURE if (Caps.ProcessorFeatures.AsUINT64 & (~(RT_BIT_64(43) - 1) | RT_BIT_64(27) | RT_BIT_64(28))) LogRel(("NEM: Warning! Unknown CPU features: %#RX64\n", Caps.ProcessorFeatures.AsUINT64)); pVM->nem.s.uCpuFeatures.u64 = Caps.ProcessorFeatures.AsUINT64; /** @todo RECHECK: WHV_PROCESSOR_FEATURES typedef. */ /* * The cache line flush size. */ RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper(WHvCapabilityCodeProcessorClFlushSize, &Caps, sizeof(Caps)); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "WHvGetCapability/WHvCapabilityCodeProcessorClFlushSize failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); NEM_LOG_REL_CAP_EX("WHvCapabilityCodeProcessorClFlushSize", "2^%u", Caps.ProcessorClFlushSize); if (Caps.ProcessorClFlushSize < 8 && Caps.ProcessorClFlushSize > 9) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Unsupported cache line flush size: %u", Caps.ProcessorClFlushSize); pVM->nem.s.cCacheLineFlushShift = Caps.ProcessorClFlushSize; /* * See if they've added more properties that we're not aware of. */ /** @todo RECHECK: WHV_CAPABILITY_CODE typedef. */ if (!IsDebuggerPresent()) /* Too noisy when in debugger, so skip. */ { static const struct { uint32_t iMin, iMax; } s_aUnknowns[] = { { 0x0004, 0x000f }, { 0x1003, 0x100f }, { 0x2000, 0x200f }, { 0x3000, 0x300f }, { 0x4000, 0x400f }, }; for (uint32_t j = 0; j < RT_ELEMENTS(s_aUnknowns); j++) for (uint32_t i = s_aUnknowns[j].iMin; i <= s_aUnknowns[j].iMax; i++) { RT_ZERO(Caps); hrc = WHvGetCapabilityWrapper((WHV_CAPABILITY_CODE)i, &Caps, sizeof(Caps)); if (SUCCEEDED(hrc)) LogRel(("NEM: Warning! Unknown capability %#x returning: %.*Rhxs\n", i, sizeof(Caps), &Caps)); } } /* * For proper operation, we require CPUID exits. */ if (!pVM->nem.s.fExtendedCpuIdExit) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended CPUID exit support"); if (!pVM->nem.s.fExtendedMsrExit) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended MSR exit support"); if (!pVM->nem.s.fExtendedXcptExit) return RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Missing required extended exception exit support"); #undef NEM_LOG_REL_CAP_EX #undef NEM_LOG_REL_CAP_SUB_EX #undef NEM_LOG_REL_CAP_SUB return VINF_SUCCESS; } /** * Used to fill in g_IoCtlGetHvPartitionId. */ static NTSTATUS WINAPI nemR3WinIoctlDetector_GetHvPartitionId(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1); RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx); AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5); AssertLogRelMsgReturn(cbInput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8); RT_NOREF(pvInput); AssertLogRelMsgReturn(RT_VALID_PTR(pvOutput), ("pvOutput=%p\n", pvOutput), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(cbOutput == sizeof(HV_PARTITION_ID), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10); *(HV_PARTITION_ID *)pvOutput = NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID; g_IoCtlGetHvPartitionId.cbInput = cbInput; g_IoCtlGetHvPartitionId.cbOutput = cbOutput; g_IoCtlGetHvPartitionId.uFunction = uFunction; return STATUS_SUCCESS; } /** * Used to fill in g_IoCtlStartVirtualProcessor. */ static NTSTATUS WINAPI nemR3WinIoctlDetector_StartVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1); RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx); AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5); AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8); AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(*(HV_VP_INDEX *)pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, ("*piCpu=%u\n", *(HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10); RT_NOREF(pvOutput); g_IoCtlStartVirtualProcessor.cbInput = cbInput; g_IoCtlStartVirtualProcessor.cbOutput = cbOutput; g_IoCtlStartVirtualProcessor.uFunction = uFunction; return STATUS_SUCCESS; } /** * Used to fill in g_IoCtlStartVirtualProcessor. */ static NTSTATUS WINAPI nemR3WinIoctlDetector_StopVirtualProcessor(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1); RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx); AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5); AssertLogRelMsgReturn(cbInput == sizeof(HV_VP_INDEX), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8); AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(*(HV_VP_INDEX *)pvInput == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, ("*piCpu=%u\n", *(HV_VP_INDEX *)pvInput), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10); RT_NOREF(pvOutput); g_IoCtlStopVirtualProcessor.cbInput = cbInput; g_IoCtlStopVirtualProcessor.cbOutput = cbOutput; g_IoCtlStopVirtualProcessor.uFunction = uFunction; return STATUS_SUCCESS; } /** * Used to fill in g_IoCtlMessageSlotHandleAndGetNext */ static NTSTATUS WINAPI nemR3WinIoctlDetector_MessageSlotHandleAndGetNext(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { AssertLogRelMsgReturn(hFile == NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, ("hFile=%p\n", hFile), STATUS_INVALID_PARAMETER_1); RT_NOREF(hEvt); RT_NOREF(pfnApcCallback); RT_NOREF(pvApcCtx); AssertLogRelMsgReturn(RT_VALID_PTR(pIos), ("pIos=%p\n", pIos), STATUS_INVALID_PARAMETER_5); if (g_uBuildNo >= 17758) { /* No timeout since about build 17758, it's now always an infinite wait. So, a somewhat compatible change. */ AssertLogRelMsgReturn(cbInput == RT_UOFFSETOF(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT, cMillies), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8); AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9); PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput; AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX && pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE, ("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10); } else { AssertLogRelMsgReturn(cbInput == sizeof(VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT), ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_8); AssertLogRelMsgReturn(RT_VALID_PTR(pvInput), ("pvInput=%p\n", pvInput), STATUS_INVALID_PARAMETER_9); PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT pVidIn = (PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT)pvInput; AssertLogRelMsgReturn( pVidIn->iCpu == NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX && pVidIn->fFlags == VID_MSHAGN_F_HANDLE_MESSAGE && pVidIn->cMillies == NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT, ("iCpu=%u fFlags=%#x cMillies=%#x\n", pVidIn->iCpu, pVidIn->fFlags, pVidIn->cMillies), STATUS_INVALID_PARAMETER_9); AssertLogRelMsgReturn(cbOutput == 0, ("cbInput=%#x\n", cbInput), STATUS_INVALID_PARAMETER_10); RT_NOREF(pvOutput); } g_IoCtlMessageSlotHandleAndGetNext.cbInput = cbInput; g_IoCtlMessageSlotHandleAndGetNext.cbOutput = cbOutput; g_IoCtlMessageSlotHandleAndGetNext.uFunction = uFunction; return STATUS_SUCCESS; } #ifdef LOG_ENABLED /** * Used to fill in what g_pIoCtlDetectForLogging points to. */ static NTSTATUS WINAPI nemR3WinIoctlDetector_ForLogging(HANDLE hFile, HANDLE hEvt, PIO_APC_ROUTINE pfnApcCallback, PVOID pvApcCtx, PIO_STATUS_BLOCK pIos, ULONG uFunction, PVOID pvInput, ULONG cbInput, PVOID pvOutput, ULONG cbOutput) { RT_NOREF(hFile, hEvt, pfnApcCallback, pvApcCtx, pIos, pvInput, pvOutput); g_pIoCtlDetectForLogging->cbInput = cbInput; g_pIoCtlDetectForLogging->cbOutput = cbOutput; g_pIoCtlDetectForLogging->uFunction = uFunction; return STATUS_SUCCESS; } #endif /** * Worker for nemR3NativeInit that detect I/O control function numbers for VID. * * We use the function numbers directly in ring-0 and to name functions when * logging NtDeviceIoControlFile calls. * * @note We could alternatively do this by disassembling the respective * functions, but hooking NtDeviceIoControlFile and making fake calls * more easily provides the desired information. * * @returns VBox status code. * @param pVM The cross context VM structure. Will set I/O * control info members. * @param pErrInfo Where to always return error info. */ static int nemR3WinInitDiscoverIoControlProperties(PVM pVM, PRTERRINFO pErrInfo) { /* * Probe the I/O control information for select VID APIs so we can use * them directly from ring-0 and better log them. * */ decltype(NtDeviceIoControlFile) * const pfnOrg = *g_ppfnVidNtDeviceIoControlFile; /* VidGetHvPartitionId - must work due to memory. */ *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_GetHvPartitionId; HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID; BOOL fRet = g_pfnVidGetHvPartitionId(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &idHvPartition); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; AssertReturn(fRet && idHvPartition == NEM_WIN_IOCTL_DETECTOR_FAKE_PARTITION_ID && g_IoCtlGetHvPartitionId.uFunction != 0, RTErrInfoSetF(pErrInfo, VERR_NEM_INIT_FAILED, "Problem figuring out VidGetHvPartitionId: fRet=%u idHvPartition=%#x dwErr=%u", fRet, idHvPartition, GetLastError()) ); LogRel(("NEM: VidGetHvPartitionId -> fun:%#x in:%#x out:%#x\n", g_IoCtlGetHvPartitionId.uFunction, g_IoCtlGetHvPartitionId.cbInput, g_IoCtlGetHvPartitionId.cbOutput)); int rcRet = VINF_SUCCESS; /* VidStartVirtualProcessor */ *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StartVirtualProcessor; fRet = g_pfnVidStartVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; AssertStmt(fRet && g_IoCtlStartVirtualProcessor.uFunction != 0, rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY, "Problem figuring out VidStartVirtualProcessor: fRet=%u dwErr=%u", fRet, GetLastError()) ); LogRel(("NEM: VidStartVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStartVirtualProcessor.uFunction, g_IoCtlStartVirtualProcessor.cbInput, g_IoCtlStartVirtualProcessor.cbOutput)); /* VidStopVirtualProcessor */ *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_StopVirtualProcessor; fRet = g_pfnVidStopVirtualProcessor(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; AssertStmt(fRet && g_IoCtlStopVirtualProcessor.uFunction != 0, rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY, "Problem figuring out VidStopVirtualProcessor: fRet=%u dwErr=%u", fRet, GetLastError()) ); LogRel(("NEM: VidStopVirtualProcessor -> fun:%#x in:%#x out:%#x\n", g_IoCtlStopVirtualProcessor.uFunction, g_IoCtlStopVirtualProcessor.cbInput, g_IoCtlStopVirtualProcessor.cbOutput)); /* VidMessageSlotHandleAndGetNext */ *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_MessageSlotHandleAndGetNext; fRet = g_pfnVidMessageSlotHandleAndGetNext(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, VID_MSHAGN_F_HANDLE_MESSAGE, NEM_WIN_IOCTL_DETECTOR_FAKE_TIMEOUT); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; AssertStmt(fRet && g_IoCtlMessageSlotHandleAndGetNext.uFunction != 0, rcRet = RTERRINFO_LOG_REL_SET_F(pErrInfo, VERR_NEM_RING3_ONLY, "Problem figuring out VidMessageSlotHandleAndGetNext: fRet=%u dwErr=%u", fRet, GetLastError()) ); LogRel(("NEM: VidMessageSlotHandleAndGetNext -> fun:%#x in:%#x out:%#x\n", g_IoCtlMessageSlotHandleAndGetNext.uFunction, g_IoCtlMessageSlotHandleAndGetNext.cbInput, g_IoCtlMessageSlotHandleAndGetNext.cbOutput)); #ifdef LOG_ENABLED /* The following are only for logging: */ union { VID_MAPPED_MESSAGE_SLOT MapSlot; HV_REGISTER_NAME Name; HV_REGISTER_VALUE Value; } uBuf; /* VidMessageSlotMap */ g_pIoCtlDetectForLogging = &g_IoCtlMessageSlotMap; *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging; fRet = g_pfnVidMessageSlotMap(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, &uBuf.MapSlot, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; Assert(fRet); LogRel(("NEM: VidMessageSlotMap -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction, g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput)); /* VidGetVirtualProcessorState */ uBuf.Name = HvRegisterExplicitSuspend; g_pIoCtlDetectForLogging = &g_IoCtlGetVirtualProcessorState; *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging; fRet = g_pfnVidGetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, &uBuf.Name, 1, &uBuf.Value); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; Assert(fRet); LogRel(("NEM: VidGetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction, g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput)); /* VidSetVirtualProcessorState */ uBuf.Name = HvRegisterExplicitSuspend; g_pIoCtlDetectForLogging = &g_IoCtlSetVirtualProcessorState; *g_ppfnVidNtDeviceIoControlFile = nemR3WinIoctlDetector_ForLogging; fRet = g_pfnVidSetVirtualProcessorState(NEM_WIN_IOCTL_DETECTOR_FAKE_HANDLE, NEM_WIN_IOCTL_DETECTOR_FAKE_VP_INDEX, &uBuf.Name, 1, &uBuf.Value); *g_ppfnVidNtDeviceIoControlFile = pfnOrg; Assert(fRet); LogRel(("NEM: VidSetVirtualProcessorState -> fun:%#x in:%#x out:%#x\n", g_pIoCtlDetectForLogging->uFunction, g_pIoCtlDetectForLogging->cbInput, g_pIoCtlDetectForLogging->cbOutput)); g_pIoCtlDetectForLogging = NULL; #endif /* Done. */ pVM->nem.s.IoCtlGetHvPartitionId = g_IoCtlGetHvPartitionId; pVM->nem.s.IoCtlStartVirtualProcessor = g_IoCtlStartVirtualProcessor; pVM->nem.s.IoCtlStopVirtualProcessor = g_IoCtlStopVirtualProcessor; pVM->nem.s.IoCtlMessageSlotHandleAndGetNext = g_IoCtlMessageSlotHandleAndGetNext; return rcRet; } /** * Creates and sets up a Hyper-V (exo) partition. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pErrInfo Where to always return error info. */ static int nemR3WinInitCreatePartition(PVM pVM, PRTERRINFO pErrInfo) { AssertReturn(!pVM->nem.s.hPartition, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order")); AssertReturn(!pVM->nem.s.hPartitionDevice, RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER, "Wrong initalization order")); /* * Create the partition. */ WHV_PARTITION_HANDLE hPartition; HRESULT hrc = WHvCreatePartition(&hPartition); if (FAILED(hrc)) return RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED, "WHvCreatePartition failed with %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); int rc; /* * Set partition properties, most importantly the CPU count. */ /** * @todo Someone at Microsoft please explain another weird API: * - Why this API doesn't take the WHV_PARTITION_PROPERTY_CODE value as an * argument rather than as part of the struct. That is so weird if you've * used any other NT or windows API, including WHvGetCapability(). * - Why use PVOID when WHV_PARTITION_PROPERTY is what's expected. We * technically only need 9 bytes for setting/getting * WHVPartitionPropertyCodeProcessorClFlushSize, but the API insists on 16. */ WHV_PARTITION_PROPERTY Property; RT_ZERO(Property); Property.ProcessorCount = pVM->cCpus; hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorCount, &Property, sizeof(Property)); if (SUCCEEDED(hrc)) { RT_ZERO(Property); Property.ExtendedVmExits.X64CpuidExit = pVM->nem.s.fExtendedCpuIdExit; /** @todo Register fixed results and restrict cpuid exits */ Property.ExtendedVmExits.X64MsrExit = pVM->nem.s.fExtendedMsrExit; Property.ExtendedVmExits.ExceptionExit = pVM->nem.s.fExtendedXcptExit; hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExtendedVmExits, &Property, sizeof(Property)); if (SUCCEEDED(hrc)) { /* * We'll continue setup in nemR3NativeInitAfterCPUM. */ pVM->nem.s.fCreatedEmts = false; pVM->nem.s.hPartition = hPartition; LogRel(("NEM: Created partition %p.\n", hPartition)); return VINF_SUCCESS; } rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED, "Failed setting WHvPartitionPropertyCodeExtendedVmExits to %'#RX64: %Rhrc", Property.ExtendedVmExits.AsUINT64, hrc); } else rc = RTErrInfoSetF(pErrInfo, VERR_NEM_VM_CREATE_FAILED, "Failed setting WHvPartitionPropertyCodeProcessorCount to %u: %Rhrc (Last=%#x/%u)", pVM->cCpus, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); WHvDeletePartition(hPartition); Assert(!pVM->nem.s.hPartitionDevice); Assert(!pVM->nem.s.hPartition); return rc; } /** * Makes sure APIC and firmware will not allow X2APIC mode. * * This is rather ugly. * * @returns VBox status code * @param pVM The cross context VM structure. */ static int nemR3WinDisableX2Apic(PVM pVM) { /* * First make sure the 'Mode' config value of the APIC isn't set to X2APIC. * This defaults to APIC, so no need to change unless it's X2APIC. */ PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/apic/0/Config"); if (pCfg) { uint8_t bMode = 0; int rc = CFGMR3QueryU8(pCfg, "Mode", &bMode); AssertLogRelMsgReturn(RT_SUCCESS(rc) || rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc); if (RT_SUCCESS(rc) && bMode == PDMAPICMODE_X2APIC) { LogRel(("NEM: Adjusting APIC configuration from X2APIC to APIC max mode. X2APIC is not supported by the WinHvPlatform API!\n")); LogRel(("NEM: Disable Hyper-V if you need X2APIC for your guests!\n")); rc = CFGMR3RemoveValue(pCfg, "Mode"); rc = CFGMR3InsertInteger(pCfg, "Mode", PDMAPICMODE_APIC); AssertLogRelRCReturn(rc, rc); } } /* * Now the firmwares. * These also defaults to APIC and only needs adjusting if configured to X2APIC (2). */ static const char * const s_apszFirmwareConfigs[] = { "/Devices/efi/0/Config", "/Devices/pcbios/0/Config", }; for (unsigned i = 0; i < RT_ELEMENTS(s_apszFirmwareConfigs); i++) { pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/Devices/APIC/0/Config"); if (pCfg) { uint8_t bMode = 0; int rc = CFGMR3QueryU8(pCfg, "APIC", &bMode); AssertLogRelMsgReturn(RT_SUCCESS(rc) || rc == VERR_CFGM_VALUE_NOT_FOUND, ("%Rrc\n", rc), rc); if (RT_SUCCESS(rc) && bMode == 2) { LogRel(("NEM: Adjusting %s/Mode from 2 (X2APIC) to 1 (APIC).\n", s_apszFirmwareConfigs[i])); rc = CFGMR3RemoveValue(pCfg, "APIC"); rc = CFGMR3InsertInteger(pCfg, "APIC", 1); AssertLogRelRCReturn(rc, rc); } } } return VINF_SUCCESS; } /** * Try initialize the native API. * * This may only do part of the job, more can be done in * nemR3NativeInitAfterCPUM() and nemR3NativeInitCompleted(). * * @returns VBox status code. * @param pVM The cross context VM structure. * @param fFallback Whether we're in fallback mode or use-NEM mode. In * the latter we'll fail if we cannot initialize. * @param fForced Whether the HMForced flag is set and we should * fail if we cannot initialize. */ int nemR3NativeInit(PVM pVM, bool fFallback, bool fForced) { g_uBuildNo = RTSystemGetNtBuildNo(); /* * Some state init. */ pVM->nem.s.fA20Enabled = true; #if 0 for (VMCPUID iCpu = 0; iCpu < pVM->cCpus; iCpu++) { PNEMCPU pNemCpu = &pVM->aCpus[iCpu].nem.s; } #endif /* * Error state. * The error message will be non-empty on failure and 'rc' will be set too. */ RTERRINFOSTATIC ErrInfo; PRTERRINFO pErrInfo = RTErrInfoInitStatic(&ErrInfo); int rc = nemR3WinInitProbeAndLoad(fForced, pErrInfo); if (RT_SUCCESS(rc)) { /* * Check the capabilties of the hypervisor, starting with whether it's present. */ rc = nemR3WinInitCheckCapabilities(pVM, pErrInfo); if (RT_SUCCESS(rc)) { /* * Discover the VID I/O control function numbers we need. */ rc = nemR3WinInitDiscoverIoControlProperties(pVM, pErrInfo); if (rc == VERR_NEM_RING3_ONLY) { if (pVM->nem.s.fUseRing0Runloop) { LogRel(("NEM: Disabling UseRing0Runloop.\n")); pVM->nem.s.fUseRing0Runloop = false; } rc = VINF_SUCCESS; } if (RT_SUCCESS(rc)) { /* * Check out our ring-0 capabilities. */ rc = SUPR3CallVMMR0Ex(pVM->pVMR0, 0 /*idCpu*/, VMMR0_DO_NEM_INIT_VM, 0, NULL); if (RT_SUCCESS(rc)) { /* * Create and initialize a partition. */ rc = nemR3WinInitCreatePartition(pVM, pErrInfo); if (RT_SUCCESS(rc)) { VM_SET_MAIN_EXECUTION_ENGINE(pVM, VM_EXEC_ENGINE_NATIVE_API); Log(("NEM: Marked active!\n")); nemR3WinDisableX2Apic(pVM); /* Register release statistics */ for (VMCPUID iCpu = 0; iCpu < pVM->cCpus; iCpu++) { PNEMCPU pNemCpu = &pVM->aCpus[iCpu].nem.s; STAMR3RegisterF(pVM, &pNemCpu->StatExitPortIo, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of port I/O exits", "/NEM/CPU%u/ExitPortIo", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitMemUnmapped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unmapped memory exits", "/NEM/CPU%u/ExitMemUnmapped", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitMemIntercept, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of intercepted memory exits", "/NEM/CPU%u/ExitMemIntercept", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitHalt, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of HLT exits", "/NEM/CPU%u/ExitHalt", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitInterruptWindow, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of HLT exits", "/NEM/CPU%u/ExitInterruptWindow", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitCpuId, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of CPUID exits", "/NEM/CPU%u/ExitCpuId", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitMsr, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of MSR access exits", "/NEM/CPU%u/ExitMsr", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitException, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of exception exits", "/NEM/CPU%u/ExitException", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionBp, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #BP exits", "/NEM/CPU%u/ExitExceptionBp", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionDb, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #DB exits", "/NEM/CPU%u/ExitExceptionDb", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of #UD exits", "/NEM/CPU%u/ExitExceptionUd", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitExceptionUdHandled, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of handled #UD exits", "/NEM/CPU%u/ExitExceptionUdHandled", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatExitUnrecoverable, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of unrecoverable exits", "/NEM/CPU%u/ExitUnrecoverable", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatGetMsgTimeout, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of get message timeouts/alerts", "/NEM/CPU%u/GetMsgTimeout", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuSuccess, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of successful CPU stops", "/NEM/CPU%u/StopCpuSuccess", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPending, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stops", "/NEM/CPU%u/StopCpuPending", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingAlerts,STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pending CPU stop alerts", "/NEM/CPU%u/StopCpuPendingAlerts", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatStopCpuPendingOdd, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of odd pending CPU stops (see code)", "/NEM/CPU%u/StopCpuPendingOdd", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatCancelChangedState, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel changed state", "/NEM/CPU%u/CancelChangedState", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatCancelAlertedThread, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel alerted EMT", "/NEM/CPU%u/CancelAlertedEMT", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPre, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of pre execution FF breaks", "/NEM/CPU%u/BreakOnFFPre", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnFFPost, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of post execution FF breaks", "/NEM/CPU%u/BreakOnFFPost", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnCancel, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of cancel execution breaks", "/NEM/CPU%u/BreakOnCancel", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatBreakOnStatus, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of status code breaks", "/NEM/CPU%u/BreakOnStatus", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatImportOnDemand, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of on-demand state imports", "/NEM/CPU%u/ImportOnDemand", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturn, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of state imports on loop return", "/NEM/CPU%u/ImportOnReturn", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatImportOnReturnSkipped, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of skipped state imports on loop return", "/NEM/CPU%u/ImportOnReturnSkipped", iCpu); STAMR3RegisterF(pVM, &pNemCpu->StatQueryCpuTick, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of TSC queries", "/NEM/CPU%u/QueryCpuTick", iCpu); } PUVM pUVM = pVM->pUVM; STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesAvailable, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Free pages available to the hypervisor", "/NEM/R0Stats/cPagesAvailable"); STAMR3RegisterRefresh(pUVM, &pVM->nem.s.R0Stats.cPagesInUse, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_PAGES, STAM_REFRESH_GRP_NEM, "Pages in use by hypervisor", "/NEM/R0Stats/cPagesInUse"); } } } } } /* * We only fail if in forced mode, otherwise just log the complaint and return. */ Assert(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API || RTErrInfoIsSet(pErrInfo)); if ( (fForced || !fFallback) && pVM->bMainExecutionEngine != VM_EXEC_ENGINE_NATIVE_API) return VMSetError(pVM, RT_SUCCESS_NP(rc) ? VERR_NEM_NOT_AVAILABLE : rc, RT_SRC_POS, "%s", pErrInfo->pszMsg); if (RTErrInfoIsSet(pErrInfo)) LogRel(("NEM: Not available: %s\n", pErrInfo->pszMsg)); return VINF_SUCCESS; } /** * This is called after CPUMR3Init is done. * * @returns VBox status code. * @param pVM The VM handle.. */ int nemR3NativeInitAfterCPUM(PVM pVM) { /* * Validate sanity. */ WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition; AssertReturn(hPartition != NULL, VERR_WRONG_ORDER); AssertReturn(!pVM->nem.s.hPartitionDevice, VERR_WRONG_ORDER); AssertReturn(!pVM->nem.s.fCreatedEmts, VERR_WRONG_ORDER); AssertReturn(pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API, VERR_WRONG_ORDER); /* * Continue setting up the partition now that we've got most of the CPUID feature stuff. */ WHV_PARTITION_PROPERTY Property; HRESULT hrc; #if 0 /* Not sure if we really need to set the vendor. Update: Apparently we don't. WHvPartitionPropertyCodeProcessorVendor was removed in 17110. */ RT_ZERO(Property); Property.ProcessorVendor = pVM->nem.s.enmCpuVendor == CPUMCPUVENDOR_AMD ? WHvProcessorVendorAmd : WHvProcessorVendorIntel; hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorVendor, &Property, sizeof(Property)); if (FAILED(hrc)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to set WHvPartitionPropertyCodeProcessorVendor to %u: %Rhrc (Last=%#x/%u)", Property.ProcessorVendor, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); #endif /* Not sure if we really need to set the cache line flush size. */ RT_ZERO(Property); Property.ProcessorClFlushSize = pVM->nem.s.cCacheLineFlushShift; hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorClFlushSize, &Property, sizeof(Property)); if (FAILED(hrc)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to set WHvPartitionPropertyCodeProcessorClFlushSize to %u: %Rhrc (Last=%#x/%u)", pVM->nem.s.cCacheLineFlushShift, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); /* Intercept #DB, #BP and #UD exceptions. */ RT_ZERO(Property); Property.ExceptionExitBitmap = RT_BIT_64(WHvX64ExceptionTypeDebugTrapOrFault) | RT_BIT_64(WHvX64ExceptionTypeBreakpointTrap) | RT_BIT_64(WHvX64ExceptionTypeInvalidOpcodeFault); hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeExceptionExitBitmap, &Property, sizeof(Property)); if (FAILED(hrc)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to set WHvPartitionPropertyCodeExceptionExitBitmap to %#RX64: %Rhrc (Last=%#x/%u)", Property.ExceptionExitBitmap, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); /* * Sync CPU features with CPUM. */ /** @todo sync CPU features with CPUM. */ /* Set the partition property. */ RT_ZERO(Property); Property.ProcessorFeatures.AsUINT64 = pVM->nem.s.uCpuFeatures.u64; hrc = WHvSetPartitionProperty(hPartition, WHvPartitionPropertyCodeProcessorFeatures, &Property, sizeof(Property)); if (FAILED(hrc)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to set WHvPartitionPropertyCodeProcessorFeatures to %'#RX64: %Rhrc (Last=%#x/%u)", pVM->nem.s.uCpuFeatures.u64, hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); /* * Set up the partition and create EMTs. * * Seems like this is where the partition is actually instantiated and we get * a handle to it. */ hrc = WHvSetupPartition(hPartition); if (FAILED(hrc)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Call to WHvSetupPartition failed: %Rhrc (Last=%#x/%u)", hrc, RTNtLastStatusValue(), RTNtLastErrorValue()); /* Get the handle. */ HANDLE hPartitionDevice; __try { hPartitionDevice = ((HANDLE *)hPartition)[1]; } __except(EXCEPTION_EXECUTE_HANDLER) { hrc = GetExceptionCode(); hPartitionDevice = NULL; } if ( hPartitionDevice == NULL || hPartitionDevice == (HANDLE)(intptr_t)-1) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to get device handle for partition %p: %Rhrc", hPartition, hrc); HV_PARTITION_ID idHvPartition = HV_PARTITION_ID_INVALID; if (!g_pfnVidGetHvPartitionId(hPartitionDevice, &idHvPartition)) return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Failed to get device handle and/or partition ID for %p (hPartitionDevice=%p, Last=%#x/%u)", hPartition, hPartitionDevice, RTNtLastStatusValue(), RTNtLastErrorValue()); pVM->nem.s.hPartitionDevice = hPartitionDevice; pVM->nem.s.idHvPartition = idHvPartition; /* * Setup the EMTs. */ VMCPUID iCpu; for (iCpu = 0; iCpu < pVM->cCpus; iCpu++) { PVMCPU pVCpu = &pVM->aCpus[iCpu]; pVCpu->nem.s.hNativeThreadHandle = (RTR3PTR)RTThreadGetNativeHandle(VMR3GetThreadHandle(pVCpu->pUVCpu)); Assert((HANDLE)pVCpu->nem.s.hNativeThreadHandle != INVALID_HANDLE_VALUE); #ifndef NEM_WIN_USE_OUR_OWN_RUN_API # ifdef NEM_WIN_WITH_RING0_RUNLOOP if (!pVM->nem.s.fUseRing0Runloop) # endif { hrc = WHvCreateVirtualProcessor(hPartition, iCpu, 0 /*fFlags*/); if (FAILED(hrc)) { NTSTATUS const rcNtLast = RTNtLastStatusValue(); DWORD const dwErrLast = RTNtLastErrorValue(); while (iCpu-- > 0) { HRESULT hrc2 = WHvDeleteVirtualProcessor(hPartition, iCpu); AssertLogRelMsg(SUCCEEDED(hrc2), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n", hPartition, iCpu, hrc2, RTNtLastStatusValue(), RTNtLastErrorValue())); } return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Call to WHvSetupPartition failed: %Rhrc (Last=%#x/%u)", hrc, rcNtLast, dwErrLast); } } # ifdef NEM_WIN_WITH_RING0_RUNLOOP else # endif #endif /* !NEM_WIN_USE_OUR_OWN_RUN_API */ #if defined(NEM_WIN_WITH_RING0_RUNLOOP) || defined(NEM_WIN_USE_OUR_OWN_RUN_API) { VID_MAPPED_MESSAGE_SLOT MappedMsgSlot = { NULL, UINT32_MAX, UINT32_MAX }; if (g_pfnVidMessageSlotMap(hPartitionDevice, &MappedMsgSlot, iCpu)) { AssertLogRelMsg(MappedMsgSlot.iCpu == iCpu && MappedMsgSlot.uParentAdvisory == UINT32_MAX, ("%#x %#x (iCpu=%#x)\n", MappedMsgSlot.iCpu, MappedMsgSlot.uParentAdvisory, iCpu)); pVCpu->nem.s.pvMsgSlotMapping = MappedMsgSlot.pMsgBlock; } else { NTSTATUS const rcNtLast = RTNtLastStatusValue(); DWORD const dwErrLast = RTNtLastErrorValue(); return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Call to WHvSetupPartition failed: %Rhrc (Last=%#x/%u)", hrc, rcNtLast, dwErrLast); } } #endif } pVM->nem.s.fCreatedEmts = true; /* * Do some more ring-0 initialization now that we've got the partition handle. */ int rc = VMMR3CallR0Emt(pVM, &pVM->aCpus[0], VMMR0_DO_NEM_INIT_VM_PART_2, 0, NULL); if (RT_SUCCESS(rc)) { LogRel(("NEM: Successfully set up partition (device handle %p, partition ID %#llx)\n", hPartitionDevice, idHvPartition)); #if 1 VMMR3CallR0Emt(pVM, &pVM->aCpus[0], VMMR0_DO_NEM_UPDATE_STATISTICS, 0, NULL); LogRel(("NEM: Memory balance: %#RX64 out of %#RX64 pages in use\n", pVM->nem.s.R0Stats.cPagesInUse, pVM->nem.s.R0Stats.cPagesAvailable)); #endif /* * Register statistics on shared pages. */ /** @todo HvCallMapStatsPage */ /* * Adjust features. * Note! We've already disabled X2APIC via CFGM during the first init call. */ #if 0 && defined(DEBUG_bird) /* * Poke and probe a little. */ PVMCPU pVCpu = &pVM->aCpus[0]; uint32_t aRegNames[1024]; HV_REGISTER_VALUE aRegValues[1024]; uint32_t aPropCodes[128]; uint64_t aPropValues[128]; for (int iOuter = 0; iOuter < 5; iOuter++) { LogRel(("\niOuter %d\n", iOuter)); # if 1 /* registers */ uint32_t iRegValue = 0; uint32_t cRegChanges = 0; for (uint32_t iReg = 0; iReg < 0x001101ff; iReg++) { if (iOuter != 0 && aRegNames[iRegValue] > iReg) continue; RT_ZERO(pVCpu->nem.s.Hypercall.Experiment); pVCpu->nem.s.Hypercall.Experiment.uItem = iReg; int rc2 = VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 0, NULL); AssertLogRelRCBreak(rc2); if (pVCpu->nem.s.Hypercall.Experiment.fSuccess) { LogRel(("Register %#010x = %#18RX64, %#18RX64\n", iReg, pVCpu->nem.s.Hypercall.Experiment.uLoValue, pVCpu->nem.s.Hypercall.Experiment.uHiValue)); if (iReg == HvX64RegisterTsc) { uint64_t uTsc = ASMReadTSC(); LogRel(("TSC = %#18RX64; Delta %#18RX64 or %#18RX64\n", uTsc, pVCpu->nem.s.Hypercall.Experiment.uLoValue - uTsc, uTsc - pVCpu->nem.s.Hypercall.Experiment.uLoValue)); } if (iOuter == 0) aRegNames[iRegValue] = iReg; else if( aRegValues[iRegValue].Reg128.Low64 != pVCpu->nem.s.Hypercall.Experiment.uLoValue || aRegValues[iRegValue].Reg128.High64 != pVCpu->nem.s.Hypercall.Experiment.uHiValue) { LogRel(("Changed from %#18RX64, %#18RX64 !!\n", aRegValues[iRegValue].Reg128.Low64, aRegValues[iRegValue].Reg128.High64)); LogRel(("Delta %#18RX64, %#18RX64 !!\n", pVCpu->nem.s.Hypercall.Experiment.uLoValue - aRegValues[iRegValue].Reg128.Low64, pVCpu->nem.s.Hypercall.Experiment.uHiValue - aRegValues[iRegValue].Reg128.High64)); cRegChanges++; } aRegValues[iRegValue].Reg128.Low64 = pVCpu->nem.s.Hypercall.Experiment.uLoValue; aRegValues[iRegValue].Reg128.High64 = pVCpu->nem.s.Hypercall.Experiment.uHiValue; iRegValue++; AssertBreak(iRegValue < RT_ELEMENTS(aRegValues)); } } LogRel(("Found %u registers, %u changed\n", iRegValue, cRegChanges)); # endif # if 1 /* partition properties */ uint32_t iPropValue = 0; uint32_t cPropChanges = 0; for (uint32_t iProp = 0; iProp < 0xc11ff; iProp++) { if (iProp == HvPartitionPropertyDebugChannelId /* hangs host */) continue; if (iOuter != 0 && aPropCodes[iPropValue] > iProp) continue; RT_ZERO(pVCpu->nem.s.Hypercall.Experiment); pVCpu->nem.s.Hypercall.Experiment.uItem = iProp; int rc2 = VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 1, NULL); AssertLogRelRCBreak(rc2); if (pVCpu->nem.s.Hypercall.Experiment.fSuccess) { LogRel(("Property %#010x = %#18RX64\n", iProp, pVCpu->nem.s.Hypercall.Experiment.uLoValue)); if (iOuter == 0) aPropCodes[iPropValue] = iProp; else if (aPropValues[iPropValue] != pVCpu->nem.s.Hypercall.Experiment.uLoValue) { LogRel(("Changed from %#18RX64, delta %#18RX64!!\n", aPropValues[iPropValue], pVCpu->nem.s.Hypercall.Experiment.uLoValue - aPropValues[iPropValue])); cRegChanges++; } aPropValues[iPropValue] = pVCpu->nem.s.Hypercall.Experiment.uLoValue; iPropValue++; AssertBreak(iPropValue < RT_ELEMENTS(aPropValues)); } } LogRel(("Found %u properties, %u changed\n", iPropValue, cPropChanges)); # endif /* Modify the TSC register value and see what changes. */ if (iOuter != 0) { RT_ZERO(pVCpu->nem.s.Hypercall.Experiment); pVCpu->nem.s.Hypercall.Experiment.uItem = HvX64RegisterTsc; pVCpu->nem.s.Hypercall.Experiment.uHiValue = UINT64_C(0x00000fffffffffff) >> iOuter; pVCpu->nem.s.Hypercall.Experiment.uLoValue = UINT64_C(0x0011100000000000) << iOuter; VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 2, NULL); LogRel(("Setting HvX64RegisterTsc -> %RTbool (%#RX64)\n", pVCpu->nem.s.Hypercall.Experiment.fSuccess, pVCpu->nem.s.Hypercall.Experiment.uStatus)); } RT_ZERO(pVCpu->nem.s.Hypercall.Experiment); pVCpu->nem.s.Hypercall.Experiment.uItem = HvX64RegisterTsc; VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_NEM_EXPERIMENT, 0, NULL); LogRel(("HvX64RegisterTsc = %#RX64, %#RX64\n", pVCpu->nem.s.Hypercall.Experiment.uLoValue, pVCpu->nem.s.Hypercall.Experiment.uHiValue)); } #endif return VINF_SUCCESS; } return VMSetError(pVM, VERR_NEM_VM_CREATE_FAILED, RT_SRC_POS, "Call to NEMR0InitVMPart2 failed: %Rrc", rc); } int nemR3NativeInitCompleted(PVM pVM, VMINITCOMPLETED enmWhat) { //BOOL fRet = SetThreadPriority(GetCurrentThread(), 0); //AssertLogRel(fRet); NOREF(pVM); NOREF(enmWhat); return VINF_SUCCESS; } int nemR3NativeTerm(PVM pVM) { /* * Delete the partition. */ WHV_PARTITION_HANDLE hPartition = pVM->nem.s.hPartition; pVM->nem.s.hPartition = NULL; pVM->nem.s.hPartitionDevice = NULL; if (hPartition != NULL) { VMCPUID iCpu = pVM->nem.s.fCreatedEmts ? pVM->cCpus : 0; LogRel(("NEM: Destroying partition %p with its %u VCpus...\n", hPartition, iCpu)); while (iCpu-- > 0) { pVM->aCpus[iCpu].nem.s.pvMsgSlotMapping = NULL; #ifndef NEM_WIN_USE_OUR_OWN_RUN_API # ifdef NEM_WIN_WITH_RING0_RUNLOOP if (!pVM->nem.s.fUseRing0Runloop) # endif { HRESULT hrc = WHvDeleteVirtualProcessor(hPartition, iCpu); AssertLogRelMsg(SUCCEEDED(hrc), ("WHvDeleteVirtualProcessor(%p, %u) -> %Rhrc (Last=%#x/%u)\n", hPartition, iCpu, hrc, RTNtLastStatusValue(), RTNtLastErrorValue())); } #endif } WHvDeletePartition(hPartition); } pVM->nem.s.fCreatedEmts = false; return VINF_SUCCESS; } /** * VM reset notification. * * @param pVM The cross context VM structure. */ void nemR3NativeReset(PVM pVM) { /* Unfix the A20 gate. */ pVM->nem.s.fA20Fixed = false; } /** * Reset CPU due to INIT IPI or hot (un)plugging. * * @param pVCpu The cross context virtual CPU structure of the CPU being * reset. * @param fInitIpi Whether this is the INIT IPI or hot (un)plugging case. */ void nemR3NativeResetCpu(PVMCPU pVCpu, bool fInitIpi) { /* Lock the A20 gate if INIT IPI, make sure it's enabled. */ if (fInitIpi && pVCpu->idCpu > 0) { PVM pVM = pVCpu->CTX_SUFF(pVM); if (!pVM->nem.s.fA20Enabled) nemR3NativeNotifySetA20(pVCpu, true); pVM->nem.s.fA20Enabled = true; pVM->nem.s.fA20Fixed = true; } } VBOXSTRICTRC nemR3NativeRunGC(PVM pVM, PVMCPU pVCpu) { #ifdef NEM_WIN_WITH_RING0_RUNLOOP if (pVM->nem.s.fUseRing0Runloop) { for (;;) { VBOXSTRICTRC rcStrict = VMMR3CallR0EmtFast(pVM, pVCpu, VMMR0_DO_NEM_RUN); if (RT_SUCCESS(rcStrict)) { /* * We deal with VINF_NEM_FLUSH_TLB here, since we're running the risk of * getting these while we already got another RC (I/O ports). */ /* Status codes: */ VBOXSTRICTRC rcPending = pVCpu->nem.s.rcPending; pVCpu->nem.s.rcPending = VINF_SUCCESS; if (rcStrict == VINF_NEM_FLUSH_TLB || rcPending == VINF_NEM_FLUSH_TLB) { LogFlow(("nemR3NativeRunGC: calling PGMFlushTLB...\n")); int rc = PGMFlushTLB(pVCpu, CPUMGetGuestCR3(pVCpu), true); AssertRCReturn(rc, rc); if (rcStrict == VINF_NEM_FLUSH_TLB) { if ( !VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_POST_MASK | VM_FF_HP_R0_PRE_HM_MASK) && !VMCPU_FF_IS_ANY_SET(pVCpu, (VMCPU_FF_HIGH_PRIORITY_POST_MASK | VMCPU_FF_HP_R0_PRE_HM_MASK) & ~VMCPU_FF_RESUME_GUEST_MASK)) { VMCPU_FF_CLEAR_MASK(pVCpu, VMCPU_FF_RESUME_GUEST_MASK); continue; } rcStrict = VINF_SUCCESS; } } else AssertMsg(rcPending == VINF_SUCCESS, ("rcPending=%Rrc\n", VBOXSTRICTRC_VAL(rcPending) )); } LogFlow(("nemR3NativeRunGC: returns %Rrc\n", VBOXSTRICTRC_VAL(rcStrict) )); return rcStrict; } } #endif return nemHCWinRunGC(pVM, pVCpu, NULL /*pGVM*/, NULL /*pGVCpu*/); } bool nemR3NativeCanExecuteGuest(PVM pVM, PVMCPU pVCpu) { NOREF(pVM); NOREF(pVCpu); return true; } bool nemR3NativeSetSingleInstruction(PVM pVM, PVMCPU pVCpu, bool fEnable) { NOREF(pVM); NOREF(pVCpu); NOREF(fEnable); return false; } /** * Forced flag notification call from VMEmt.h. * * This is only called when pVCpu is in the VMCPUSTATE_STARTED_EXEC_NEM state. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the CPU * to be notified. * @param fFlags Notification flags, VMNOTIFYFF_FLAGS_XXX. */ void nemR3NativeNotifyFF(PVM pVM, PVMCPU pVCpu, uint32_t fFlags) { #ifdef NEM_WIN_USE_OUR_OWN_RUN_API nemHCWinCancelRunVirtualProcessor(pVM, pVCpu); #else # ifdef NEM_WIN_WITH_RING0_RUNLOOP if (pVM->nem.s.fUseRing0Runloop) nemHCWinCancelRunVirtualProcessor(pVM, pVCpu); else # endif { Log8(("nemR3NativeNotifyFF: canceling %u\n", pVCpu->idCpu)); HRESULT hrc = WHvCancelRunVirtualProcessor(pVM->nem.s.hPartition, pVCpu->idCpu, 0); AssertMsg(SUCCEEDED(hrc), ("WHvCancelRunVirtualProcessor -> hrc=%Rhrc\n", hrc)); RT_NOREF_PV(hrc); } #endif RT_NOREF_PV(fFlags); } DECLINLINE(int) nemR3NativeGCPhys2R3PtrReadOnly(PVM pVM, RTGCPHYS GCPhys, const void **ppv) { PGMPAGEMAPLOCK Lock; int rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, GCPhys, ppv, &Lock); if (RT_SUCCESS(rc)) PGMPhysReleasePageMappingLock(pVM, &Lock); return rc; } DECLINLINE(int) nemR3NativeGCPhys2R3PtrWriteable(PVM pVM, RTGCPHYS GCPhys, void **ppv) { PGMPAGEMAPLOCK Lock; int rc = PGMPhysGCPhys2CCPtr(pVM, GCPhys, ppv, &Lock); if (RT_SUCCESS(rc)) PGMPhysReleasePageMappingLock(pVM, &Lock); return rc; } int nemR3NativeNotifyPhysRamRegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb) { Log5(("nemR3NativeNotifyPhysRamRegister: %RGp LB %RGp\n", GCPhys, cb)); NOREF(pVM); NOREF(GCPhys); NOREF(cb); return VINF_SUCCESS; } int nemR3NativeNotifyPhysMmioExMap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags, void *pvMmio2) { Log5(("nemR3NativeNotifyPhysMmioExMap: %RGp LB %RGp fFlags=%#x pvMmio2=%p\n", GCPhys, cb, fFlags, pvMmio2)); NOREF(pVM); NOREF(GCPhys); NOREF(cb); NOREF(fFlags); NOREF(pvMmio2); return VINF_SUCCESS; } int nemR3NativeNotifyPhysMmioExUnmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags) { Log5(("nemR3NativeNotifyPhysMmioExUnmap: %RGp LB %RGp fFlags=%#x\n", GCPhys, cb, fFlags)); NOREF(pVM); NOREF(GCPhys); NOREF(cb); NOREF(fFlags); return VINF_SUCCESS; } /** * Called early during ROM registration, right after the pages have been * allocated and the RAM range updated. * * This will be succeeded by a number of NEMHCNotifyPhysPageProtChanged() calls * and finally a NEMR3NotifyPhysRomRegisterEarly(). * * @returns VBox status code * @param pVM The cross context VM structure. * @param GCPhys The ROM address (page aligned). * @param cb The size (page aligned). * @param fFlags NEM_NOTIFY_PHYS_ROM_F_XXX. */ int nemR3NativeNotifyPhysRomRegisterEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags) { Log5(("nemR3NativeNotifyPhysRomRegisterEarly: %RGp LB %RGp fFlags=%#x\n", GCPhys, cb, fFlags)); #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. */ RTGCPHYS const cPages = cb >> X86_PAGE_SHIFT; for (RTGCPHYS iPage = 0; iPage < cPages; iPage++, GCPhys += X86_PAGE_SIZE) { const void *pvPage; int rc = nemR3NativeGCPhys2R3PtrReadOnly(pVM, GCPhys, &pvPage); if (RT_SUCCESS(rc)) { HRESULT hrc = WHvMapGpaRange(pVM->nem.s.hPartition, (void *)pvPage, GCPhys, X86_PAGE_SIZE, WHvMapGpaRangeFlagRead | WHvMapGpaRangeFlagExecute); if (SUCCEEDED(hrc)) { /* likely */ } else { LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n", GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue())); return VERR_NEM_INIT_FAILED; } } else { LogRel(("nemR3NativeNotifyPhysRomRegisterEarly: GCPhys=%RGp rc=%Rrc\n", GCPhys, rc)); return rc; } } #else NOREF(pVM); NOREF(GCPhys); NOREF(cb); #endif RT_NOREF_PV(fFlags); return VINF_SUCCESS; } /** * Called after the ROM range has been fully completed. * * This will be preceeded by a NEMR3NotifyPhysRomRegisterEarly() call as well a * number of NEMHCNotifyPhysPageProtChanged calls. * * @returns VBox status code * @param pVM The cross context VM structure. * @param GCPhys The ROM address (page aligned). * @param cb The size (page aligned). * @param fFlags NEM_NOTIFY_PHYS_ROM_F_XXX. */ int nemR3NativeNotifyPhysRomRegisterLate(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags) { Log5(("nemR3NativeNotifyPhysRomRegisterLate: %RGp LB %RGp fFlags=%#x\n", GCPhys, cb, fFlags)); NOREF(pVM); NOREF(GCPhys); NOREF(cb); NOREF(fFlags); return VINF_SUCCESS; } /** * @callback_method_impl{FNPGMPHYSNEMCHECKPAGE} */ static DECLCALLBACK(int) nemR3WinUnsetForA20CheckerCallback(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys, PPGMPHYSNEMPAGEINFO pInfo, void *pvUser) { /* We'll just unmap the memory. */ if (pInfo->u2NemState > NEM_WIN_PAGE_STATE_UNMAPPED) { #ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES int rc = nemHCWinHypercallUnmapPage(pVM, pVCpu, GCPhys); AssertRC(rc); if (RT_SUCCESS(rc)) #else HRESULT hrc = WHvUnmapGpaRange(pVM->nem.s.hPartition, GCPhys, X86_PAGE_SIZE); if (SUCCEEDED(hrc)) #endif { uint32_t cMappedPages = ASMAtomicDecU32(&pVM->nem.s.cMappedPages); NOREF(cMappedPages); Log5(("NEM GPA unmapped/A20: %RGp (was %s, cMappedPages=%u)\n", GCPhys, g_apszPageStates[pInfo->u2NemState], cMappedPages)); pInfo->u2NemState = NEM_WIN_PAGE_STATE_UNMAPPED; } else { #ifdef NEM_WIN_USE_HYPERCALLS_FOR_PAGES LogRel(("nemR3WinUnsetForA20CheckerCallback/unmap: GCPhys=%RGp rc=%Rrc\n", GCPhys, rc)); return rc; #else LogRel(("nemR3WinUnsetForA20CheckerCallback/unmap: GCPhys=%RGp hrc=%Rhrc (%#x) Last=%#x/%u\n", GCPhys, hrc, hrc, RTNtLastStatusValue(), RTNtLastErrorValue())); return VERR_INTERNAL_ERROR_2; #endif } } RT_NOREF(pVCpu, pvUser); return VINF_SUCCESS; } /** * Unmaps a page from Hyper-V for the purpose of emulating A20 gate behavior. * * @returns The PGMPhysNemQueryPageInfo result. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param GCPhys The page to unmap. */ static int nemR3WinUnmapPageForA20Gate(PVM pVM, PVMCPU pVCpu, RTGCPHYS GCPhys) { PGMPHYSNEMPAGEINFO Info; return PGMPhysNemPageInfoChecker(pVM, pVCpu, GCPhys, false /*fMakeWritable*/, &Info, nemR3WinUnsetForA20CheckerCallback, NULL); } /** * Called when the A20 state changes. * * Hyper-V doesn't seem to offer a simple way of implementing the A20 line * features of PCs. So, we do a very minimal emulation of the HMA to make DOS * happy. * * @param pVCpu The CPU the A20 state changed on. * @param fEnabled Whether it was enabled (true) or disabled. */ void nemR3NativeNotifySetA20(PVMCPU pVCpu, bool fEnabled) { Log(("nemR3NativeNotifySetA20: fEnabled=%RTbool\n", fEnabled)); PVM pVM = pVCpu->CTX_SUFF(pVM); if (!pVM->nem.s.fA20Fixed) { pVM->nem.s.fA20Enabled = fEnabled; for (RTGCPHYS GCPhys = _1M; GCPhys < _1M + _64K; GCPhys += X86_PAGE_SIZE) nemR3WinUnmapPageForA20Gate(pVM, pVCpu, GCPhys); } } /** @page pg_nem_win NEM/win - Native Execution Manager, Windows. * * On Windows the Hyper-V root partition (dom0 in zen terminology) does not have * nested VT-x or AMD-V capabilities. Early on raw-mode worked inside it, but * for a while now we've been getting \#GPs when trying to modify CR4 in the * world switcher. So, when Hyper-V is active on Windows we have little choice * but to use Hyper-V to run our VMs. * * * @section sub_nem_win_whv The WinHvPlatform API * * Since Windows 10 build 17083 there is a documented API for managing Hyper-V * VMs: header file WinHvPlatform.h and implementation in WinHvPlatform.dll. * This interface is a wrapper around the undocumented Virtualization * Infrastructure Driver (VID) API - VID.DLL and VID.SYS. The wrapper is * written in C++, namespaced, early versions (at least) was using standard C++ * container templates in several places. * * When creating a VM using WHvCreatePartition, it will only create the * WinHvPlatform structures for it, to which you get an abstract pointer. The * VID API that actually creates the partition is first engaged when you call * WHvSetupPartition after first setting a lot of properties using * WHvSetPartitionProperty. Since the VID API is just a very thin wrapper * around CreateFile and NtDeviceIoControlFile, it returns an actual HANDLE for * the partition to WinHvPlatform. We fish this HANDLE out of the WinHvPlatform * partition structures because we need to talk directly to VID for reasons * we'll get to in a bit. (Btw. we could also intercept the CreateFileW or * NtDeviceIoControlFile calls from VID.DLL to get the HANDLE should fishing in * the partition structures become difficult.) * * The WinHvPlatform API requires us to both set the number of guest CPUs before * setting up the partition and call WHvCreateVirtualProcessor for each of them. * The CPU creation function boils down to a VidMessageSlotMap call that sets up * and maps a message buffer into ring-3 for async communication with hyper-V * and/or the VID.SYS thread actually running the CPU thru * WinHvRunVpDispatchLoop(). When for instance a VMEXIT is encountered, hyper-V * sends a message that the WHvRunVirtualProcessor API retrieves (and later * acknowledges) via VidMessageSlotHandleAndGetNext. Since or about build * 17757 a register page is also mapped into user space when creating the * virtual CPU. It should be noteded that WHvDeleteVirtualProcessor doesn't do * much as there seems to be no partner function VidMessagesSlotMap that * reverses what it did. * * Memory is managed thru calls to WHvMapGpaRange and WHvUnmapGpaRange (GPA does * not mean grade point average here, but rather guest physical addressspace), * which corresponds to VidCreateVaGpaRangeSpecifyUserVa and VidDestroyGpaRange * respectively. As 'UserVa' indicates, the functions works on user process * memory. The mappings are also subject to quota restrictions, so the number * of ranges are limited and probably their total size as well. Obviously * VID.SYS keeps track of the ranges, but so does WinHvPlatform, which means * there is a bit of overhead involved and quota restrctions makes sense. * * Running guest code is done through the WHvRunVirtualProcessor function. It * asynchronously starts or resumes hyper-V CPU execution and then waits for an * VMEXIT message. Hyper-V / VID.SYS will return information about the message * in the message buffer mapping, and WHvRunVirtualProcessor will convert that * finto it's own WHV_RUN_VP_EXIT_CONTEXT format. * * Other threads can interrupt the execution by using WHvCancelVirtualProcessor, * which since or about build 17757 uses VidMessageSlotHandleAndGetNext to do * the work (earlier builds would open the waiting thread, do a dummy * QueueUserAPC on it, and let it upon return use VidStopVirtualProcessor to * do the actual stopping). While there is certainly a race between cancelation * and the CPU causing a natural VMEXIT, it is not known whether this still * causes extra work on subsequent WHvRunVirtualProcessor calls (it did in and * earlier 17134). * * Registers are retrieved and set via WHvGetVirtualProcessorRegisters and * WHvSetVirtualProcessorRegisters. In addition, several VMEXITs include * essential register state in the exit context information, potentially making * it possible to emulate the instruction causing the exit without involving * WHvGetVirtualProcessorRegisters. * * * @subsection subsec_nem_win_whv_cons Issues & Feedback * * Here are some observations (mostly against build 17101): * * - The VMEXIT performance is dismal (build 17134). * * Our proof of concept implementation with a kernel runloop (i.e. not using * WHvRunVirtualProcessor and friends, but calling VID.SYS fast I/O control * entry point directly) delivers 9-10% of the port I/O performance and only * 6-7% of the MMIO performance that we have with our own hypervisor. * * When using the offical WinHvPlatform API, the numbers are %3 for port I/O * and 5% for MMIO. * * While the tests we've done are using tight tight loops only doing port I/O * and MMIO, the problem is clearly visible when running regular guest OSes. * Anything that hammers the VGA device would be suffering, for example: * * - Windows 2000 boot screen animation overloads us with MMIO exits * and won't even boot because all the time is spent in interrupt * handlers and redrawin the screen. * * - DSL 4.4 and its bootmenu logo is slower than molasses in january. * * We have not found a workaround for this yet. * * Something that might improve the issue a little is to detect blocks with * excessive MMIO and port I/O exits and emulate instructions to cover * multiple exits before letting Hyper-V have a go at the guest execution * again. This will only improve the situation under some circumstances, * since emulating instructions without recompilation can be expensive, so * there will only be real gains if the exitting instructions are tightly * packed. * * Update: Security fixes during the summer of 2018 caused the performance to * dropped even more. * * Update [build 17757]: Some performance improvements here, but they don't * yet make up for what was lost this summer. * * * - We need a way to directly modify the TSC offset (or bias if you like). * * The current approach of setting the WHvX64RegisterTsc register one by one * on each virtual CPU in sequence will introduce random inaccuracies, * especially if the thread doing the job is reschduled at a bad time. * * * - Unable to access WHvX64RegisterMsrMtrrCap (build 17134). * * * - On AMD Ryzen grub/debian 9.0 ends up with a unrecoverable exception * when IA32_MTRR_PHYSMASK0 is written. * * * - The IA32_APIC_BASE register does not work right: * * - Attempts by the guest to clear bit 11 (EN) are ignored, both the * guest and the VMM reads back the old value. * * - Attempts to modify the base address (bits NN:12) seems to be ignored * in the same way. * * - The VMM can modify both the base address as well as the the EN and * BSP bits, however this is useless if we cannot intercept the WRMSR. * * - Attempts by the guest to set the EXTD bit (X2APIC) result in \#GP(0), * while the VMM ends up with with ERROR_HV_INVALID_PARAMETER. Seems * there is no way to support X2APIC. * * * - Not sure if this is a thing, but WHvCancelVirtualProcessor seems to cause * cause a lot more spurious WHvRunVirtualProcessor returns that what we get * with the replacement code. By spurious returns we mean that the * subsequent call to WHvRunVirtualProcessor would return immediately. * * Update [build 17757]: New cancelation code might have addressed this, but * haven't had time to test it yet. * * * - There is no API for modifying protection of a page within a GPA range. * * From what we can tell, the only way to modify the protection (like readonly * -> writable, or vice versa) is to first unmap the range and then remap it * with the new protection. * * We are for instance doing this quite a bit in order to track dirty VRAM * pages. VRAM pages starts out as readonly, when the guest writes to a page * we take an exit, notes down which page it is, makes it writable and restart * the instruction. After refreshing the display, we reset all the writable * pages to readonly again, bulk fashion. * * Now to work around this issue, we do page sized GPA ranges. In addition to * add a lot of tracking overhead to WinHvPlatform and VID.SYS, this also * causes us to exceed our quota before we've even mapped a default sized * (128MB) VRAM page-by-page. So, to work around this quota issue we have to * lazily map pages and actively restrict the number of mappings. * * Our best workaround thus far is bypassing WinHvPlatform and VID entirely * when in comes to guest memory management and instead use the underlying * hypercalls (HvCallMapGpaPages, HvCallUnmapGpaPages) to do it ourselves. * (This also maps a whole lot better into our own guest page management * infrastructure.) * * Update [build 17757]: Introduces a KVM like dirty logging API which could * help tracking dirty VGA pages, while being useless for shadow ROM and * devices trying catch the guest updating descriptors and such. * * * - Observed problems doing WHvUnmapGpaRange immediately followed by * WHvMapGpaRange. * * As mentioned above, we've been forced to use this sequence when modifying * page protection. However, when transitioning from readonly to writable, * we've ended up looping forever with the same write to readonly memory * VMEXIT. We're wondering if this issue might be related to the lazy mapping * logic in WinHvPlatform. * * Workaround: Insert a WHvRunVirtualProcessor call and make sure to get a GPA * unmapped exit between the two calls. Not entirely great performance wise * (or the santity of our code). * * * - Implementing A20 gate behavior is tedious, where as correctly emulating the * A20M# pin (present on 486 and later) is near impossible for SMP setups * (e.g. possiblity of two CPUs with different A20 status). * * Workaround: Only do A20 on CPU 0, restricting the emulation to HMA. We * unmap all pages related to HMA (0x100000..0x10ffff) when the A20 state * changes, lazily syncing the right pages back when accessed. * * * - WHVRunVirtualProcessor wastes time converting VID/Hyper-V messages to its * own format (WHV_RUN_VP_EXIT_CONTEXT). * * We understand this might be because Microsoft wishes to remain free to * modify the VID/Hyper-V messages, but it's still rather silly and does slow * things down a little. We'd much rather just process the messages directly. * * * - WHVRunVirtualProcessor would've benefited from using a callback interface: * * - The potential size changes of the exit context structure wouldn't be * an issue, since the function could manage that itself. * * - State handling could probably be simplified (like cancelation). * * * - WHvGetVirtualProcessorRegisters and WHvSetVirtualProcessorRegisters * internally converts register names, probably using temporary heap buffers. * * From the looks of things, they are converting from WHV_REGISTER_NAME to * HV_REGISTER_NAME from in the "Virtual Processor Register Names" section in * the "Hypervisor Top-Level Functional Specification" document. This feels * like an awful waste of time. * * We simply cannot understand why HV_REGISTER_NAME isn't used directly here, * or at least the same values, making any conversion reduntant. Restricting * access to certain registers could easily be implement by scanning the * inputs. * * To avoid the heap + conversion overhead, we're currently using the * HvCallGetVpRegisters and HvCallSetVpRegisters calls directly, at least for * the ring-0 code. * * Update [build 17757]: Register translation has been very cleverly * optimized and made table driven (2 top level tables, 4 + 1 leaf tables). * Register information consists of the 32-bit HV register name, register page * offset, and flags (giving valid offset, size and more). Register * getting/settings seems to be done by hoping that the register page provides * it all, and falling back on the VidSetVirtualProcessorState if one or more * registers are not available there. * * Note! We have currently not updated our ring-0 code to take the register * page into account, so it's suffering a little compared to the ring-3 code * that now uses the offical APIs for registers. * * * - The YMM and XCR0 registers are not yet named (17083). This probably * wouldn't be a problem if HV_REGISTER_NAME was used, see previous point. * * Update [build 17757]: XCR0 is added. YMM register values seems to be put * into a yet undocumented XsaveState interface. Approach is a little bulky, * but saves number of enums and dispenses with register transation. Also, * the underlying Vid setter API duplicates the input buffer on the heap, * adding a 16 byte header. * * * - Why does VID.SYS only query/set 32 registers at the time thru the * HvCallGetVpRegisters and HvCallSetVpRegisters hypercalls? * * We've not trouble getting/setting all the registers defined by * WHV_REGISTER_NAME in one hypercall (around 80). Some kind of stack * buffering or similar? * * * - To handle the VMMCALL / VMCALL instructions, it seems we need to intercept * \#UD exceptions and inspect the opcodes. A dedicated exit for hypercalls * would be more efficient, esp. for guests using \#UD for other purposes.. * * * - Wrong instruction length in the VpContext with unmapped GPA memory exit * contexts on 17115/AMD. * * One byte "PUSH CS" was reported as 2 bytes, while a two byte * "MOV [EBX],EAX" was reported with a 1 byte instruction length. Problem * naturally present in untranslated hyper-v messages. * * * - The I/O port exit context information seems to be missing the address size * information needed for correct string I/O emulation. * * VT-x provides this information in bits 7:9 in the instruction information * field on newer CPUs. AMD-V in bits 7:9 in the EXITINFO1 field in the VMCB. * * We can probably work around this by scanning the instruction bytes for * address size prefixes. Haven't investigated it any further yet. * * * - Querying WHvCapabilityCodeExceptionExitBitmap returns zero even when * intercepts demonstrably works (17134). * * * - Querying HvPartitionPropertyDebugChannelId via HvCallGetPartitionProperty * (hypercall) hangs the host (17134). * * * * Old concerns that have been addressed: * * - The WHvCancelVirtualProcessor API schedules a dummy usermode APC callback * in order to cancel any current or future alertable wait in VID.SYS during * the VidMessageSlotHandleAndGetNext call. * * IIRC this will make the kernel schedule the specified callback thru * NTDLL!KiUserApcDispatcher by modifying the thread context and quite * possibly the userland thread stack. When the APC callback returns to * KiUserApcDispatcher, it will call NtContinue to restore the old thread * context and resume execution from there. This naturally adds up to some * CPU cycles, ring transitions aren't for free, especially after Spectre & * Meltdown mitigations. * * Using NtAltertThread call could do the same without the thread context * modifications and the extra kernel call. * * Update: All concerns have addressed in or about build 17757. * * The WHvCancelVirtualProcessor API is now implemented using a new * VidMessageSlotHandleAndGetNext() flag (4). Codepath is slightly longer * than NtAlertThread, but has the added benefit that spurious wakeups can be * more easily reduced. * * * - When WHvRunVirtualProcessor returns without a message, or on a terse * VID message like HLT, it will make a kernel call to get some registers. * This is potentially inefficient if the caller decides he needs more * register state. * * It would be better to just return what's available and let the caller fetch * what is missing from his point of view in a single kernel call. * * Update: All concerns have been addressed in or about build 17757. Selected * registers are now available via shared memory and thus HLT should (not * verified) no longer require a system call to compose the exit context data. * * * - The WHvRunVirtualProcessor implementation does lazy GPA range mappings when * a unmapped GPA message is received from hyper-V. * * Since MMIO is currently realized as unmapped GPA, this will slow down all * MMIO accesses a tiny little bit as WHvRunVirtualProcessor looks up the * guest physical address to check if it is a pending lazy mapping. * * The lazy mapping feature makes no sense to us. We as API user have all the * information and can do lazy mapping ourselves if we want/have to (see next * point). * * Update: All concerns have been addressed in or about build 17757. * * * - The WHvGetCapability function has a weird design: * - The CapabilityCode parameter is pointlessly duplicated in the output * structure (WHV_CAPABILITY). * * - API takes void pointer, but everyone will probably be using * WHV_CAPABILITY due to WHV_CAPABILITY::CapabilityCode making it * impractical to use anything else. * * - No output size. * * - See GetFileAttributesEx, GetFileInformationByHandleEx, * FindFirstFileEx, and others for typical pattern for generic * information getters. * * Update: All concerns have been addressed in build 17110. * * * - The WHvGetPartitionProperty function uses the same weird design as * WHvGetCapability, see above. * * Update: All concerns have been addressed in build 17110. * * * - The WHvSetPartitionProperty function has a totally weird design too: * - In contrast to its partner WHvGetPartitionProperty, the property code * is not a separate input parameter here but part of the input * structure. * * - The input structure is a void pointer rather than a pointer to * WHV_PARTITION_PROPERTY which everyone probably will be using because * of the WHV_PARTITION_PROPERTY::PropertyCode field. * * - Really, why use PVOID for the input when the function isn't accepting * minimal sizes. E.g. WHVPartitionPropertyCodeProcessorClFlushSize only * requires a 9 byte input, but the function insists on 16 bytes (17083). * * - See GetFileAttributesEx, SetFileInformationByHandle, FindFirstFileEx, * and others for typical pattern for generic information setters and * getters. * * Update: All concerns have been addressed in build 17110. * * * * @section sec_nem_win_impl Our implementation. * * We set out with the goal of wanting to run as much as possible in ring-0, * reasoning that this would give use the best performance. * * This goal was approached gradually, starting out with a pure WinHvPlatform * implementation, gradually replacing parts: register access, guest memory * handling, running virtual processors. Then finally moving it all into * ring-0, while keeping most of it configurable so that we could make * comparisons (see NEMInternal.h and nemR3NativeRunGC()). * * * @subsection subsect_nem_win_impl_ioctl VID.SYS I/O control calls * * To run things in ring-0 we need to talk directly to VID.SYS thru its I/O * control interface. Looking at changes between like build 17083 and 17101 (if * memory serves) a set of the VID I/O control numbers shifted a little, which * means we need to determin them dynamically. We currently do this by hooking * the NtDeviceIoControlFile API call from VID.DLL and snooping up the * parameters when making dummy calls to relevant APIs. (We could also * disassemble the relevant APIs and try fish out the information from that, but * this is way simpler.) * * Issuing I/O control calls from ring-0 is facing a small challenge with * respect to direct buffering. When using direct buffering the device will * typically check that the buffer is actually in the user address space range * and reject kernel addresses. Fortunately, we've got the cross context VM * structure that is mapped into both kernel and user space, it's also locked * and safe to access from kernel space. So, we place the I/O control buffers * in the per-CPU part of it (NEMCPU::uIoCtlBuf) and give the driver the user * address if direct access buffering or kernel address if not. * * The I/O control calls are 'abstracted' in the support driver, see * SUPR0IoCtlSetupForHandle(), SUPR0IoCtlPerform() and SUPR0IoCtlCleanup(). * * * @subsection subsect_nem_win_impl_cpumctx CPUMCTX * * Since the CPU state needs to live in Hyper-V when executing, we probably * should not transfer more than necessary when handling VMEXITs. To help us * manage this CPUMCTX got a new field CPUMCTX::fExtrn that to indicate which * part of the state is currently externalized (== in Hyper-V). * * * @subsection sec_nem_win_benchmarks Benchmarks. * * @subsubsection subsect_nem_win_benchmarks_bs2t1 17134/2018-06-22: Bootsector2-test1 * * This is ValidationKit/bootsectors/bootsector2-test1.asm as of 2018-06-22 * (internal r123172) running a the release build of VirtualBox from the same * source, though with exit optimizations disabled. Host is AMD Threadripper 1950X * running out an up to date 64-bit Windows 10 build 17134. * * The base line column is using the official WinHv API for everything but physical * memory mapping. The 2nd column is the default NEM/win configuration where we * put the main execution loop in ring-0, using hypercalls when we can and VID for * managing execution. The 3rd column is regular VirtualBox using AMD-V directly, * hyper-V is disabled, main execution loop in ring-0. * * @verbatim TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V 32-bit paged protected mode, CPUID : 108 874 ins/sec 113% / 123 602 1198% / 1 305 113 32-bit pae protected mode, CPUID : 106 722 ins/sec 115% / 122 740 1232% / 1 315 201 64-bit long mode, CPUID : 106 798 ins/sec 114% / 122 111 1198% / 1 280 404 16-bit unpaged protected mode, CPUID : 106 835 ins/sec 114% / 121 994 1216% / 1 299 665 32-bit unpaged protected mode, CPUID : 105 257 ins/sec 115% / 121 772 1235% / 1 300 860 real mode, CPUID : 104 507 ins/sec 116% / 121 800 1228% / 1 283 848 CPUID EAX=1 : PASSED 32-bit paged protected mode, RDTSC : 99 581 834 ins/sec 100% / 100 323 307 93% / 93 473 299 32-bit pae protected mode, RDTSC : 99 620 585 ins/sec 100% / 99 960 952 84% / 83 968 839 64-bit long mode, RDTSC : 100 540 009 ins/sec 100% / 100 946 372 93% / 93 652 826 16-bit unpaged protected mode, RDTSC : 99 688 473 ins/sec 100% / 100 097 751 76% / 76 281 287 32-bit unpaged protected mode, RDTSC : 98 385 857 ins/sec 102% / 100 510 404 94% / 93 379 536 real mode, RDTSC : 100 087 967 ins/sec 101% / 101 386 138 93% / 93 234 999 RDTSC : PASSED 32-bit paged protected mode, Read CR4 : 2 156 102 ins/sec 98% / 2 121 967 17114% / 369 009 009 32-bit pae protected mode, Read CR4 : 2 163 820 ins/sec 98% / 2 133 804 17469% / 377 999 261 64-bit long mode, Read CR4 : 2 164 822 ins/sec 98% / 2 128 698 18875% / 408 619 313 16-bit unpaged protected mode, Read CR4 : 2 162 367 ins/sec 100% / 2 168 508 17132% / 370 477 568 32-bit unpaged protected mode, Read CR4 : 2 163 189 ins/sec 100% / 2 169 808 16768% / 362 734 679 real mode, Read CR4 : 2 162 436 ins/sec 100% / 2 164 914 15551% / 336 288 998 Read CR4 : PASSED real mode, 32-bit IN : 104 649 ins/sec 118% / 123 513 1028% / 1 075 831 real mode, 32-bit OUT : 107 102 ins/sec 115% / 123 660 982% / 1 052 259 real mode, 32-bit IN-to-ring-3 : 105 697 ins/sec 98% / 104 471 201% / 213 216 real mode, 32-bit OUT-to-ring-3 : 105 830 ins/sec 98% / 104 598 198% / 210 495 16-bit unpaged protected mode, 32-bit IN : 104 855 ins/sec 117% / 123 174 1029% / 1 079 591 16-bit unpaged protected mode, 32-bit OUT : 107 529 ins/sec 115% / 124 250 992% / 1 067 053 16-bit unpaged protected mode, 32-bit IN-to-ring-3 : 106 337 ins/sec 103% / 109 565 196% / 209 367 16-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 107 558 ins/sec 100% / 108 237 191% / 206 387 32-bit unpaged protected mode, 32-bit IN : 106 351 ins/sec 116% / 123 584 1016% / 1 081 325 32-bit unpaged protected mode, 32-bit OUT : 106 424 ins/sec 116% / 124 252 995% / 1 059 408 32-bit unpaged protected mode, 32-bit IN-to-ring-3 : 104 035 ins/sec 101% / 105 305 202% / 210 750 32-bit unpaged protected mode, 32-bit OUT-to-ring-3 : 103 831 ins/sec 102% / 106 919 205% / 213 198 32-bit paged protected mode, 32-bit IN : 103 356 ins/sec 119% / 123 870 1041% / 1 076 463 32-bit paged protected mode, 32-bit OUT : 107 177 ins/sec 115% / 124 302 998% / 1 069 655 32-bit paged protected mode, 32-bit IN-to-ring-3 : 104 491 ins/sec 100% / 104 744 200% / 209 264 32-bit paged protected mode, 32-bit OUT-to-ring-3 : 106 603 ins/sec 97% / 103 849 197% / 210 219 32-bit pae protected mode, 32-bit IN : 105 923 ins/sec 115% / 122 759 1041% / 1 103 261 32-bit pae protected mode, 32-bit OUT : 107 083 ins/sec 117% / 126 057 1024% / 1 096 667 32-bit pae protected mode, 32-bit IN-to-ring-3 : 106 114 ins/sec 97% / 103 496 199% / 211 312 32-bit pae protected mode, 32-bit OUT-to-ring-3 : 105 675 ins/sec 96% / 102 096 198% / 209 890 64-bit long mode, 32-bit IN : 105 800 ins/sec 113% / 120 006 1013% / 1 072 116 64-bit long mode, 32-bit OUT : 105 635 ins/sec 113% / 120 375 997% / 1 053 655 64-bit long mode, 32-bit IN-to-ring-3 : 105 274 ins/sec 95% / 100 763 197% / 208 026 64-bit long mode, 32-bit OUT-to-ring-3 : 106 262 ins/sec 94% / 100 749 196% / 209 288 NOP I/O Port Access : PASSED 32-bit paged protected mode, 32-bit read : 57 687 ins/sec 119% / 69 136 1197% / 690 548 32-bit paged protected mode, 32-bit write : 57 957 ins/sec 118% / 68 935 1183% / 685 930 32-bit paged protected mode, 32-bit read-to-ring-3 : 57 958 ins/sec 95% / 55 432 276% / 160 505 32-bit paged protected mode, 32-bit write-to-ring-3 : 57 922 ins/sec 100% / 58 340 304% / 176 464 32-bit pae protected mode, 32-bit read : 57 478 ins/sec 119% / 68 453 1141% / 656 159 32-bit pae protected mode, 32-bit write : 57 226 ins/sec 118% / 68 097 1157% / 662 504 32-bit pae protected mode, 32-bit read-to-ring-3 : 57 582 ins/sec 94% / 54 651 268% / 154 867 32-bit pae protected mode, 32-bit write-to-ring-3 : 57 697 ins/sec 100% / 57 750 299% / 173 030 64-bit long mode, 32-bit read : 57 128 ins/sec 118% / 67 779 1071% / 611 949 64-bit long mode, 32-bit write : 57 127 ins/sec 118% / 67 632 1084% / 619 395 64-bit long mode, 32-bit read-to-ring-3 : 57 181 ins/sec 94% / 54 123 265% / 151 937 64-bit long mode, 32-bit write-to-ring-3 : 57 297 ins/sec 99% / 57 286 294% / 168 694 16-bit unpaged protected mode, 32-bit read : 58 827 ins/sec 118% / 69 545 1185% / 697 602 16-bit unpaged protected mode, 32-bit write : 58 678 ins/sec 118% / 69 442 1183% / 694 387 16-bit unpaged protected mode, 32-bit read-to-ring-3 : 57 841 ins/sec 96% / 55 730 275% / 159 163 16-bit unpaged protected mode, 32-bit write-to-ring-3 : 57 855 ins/sec 101% / 58 834 304% / 176 169 32-bit unpaged protected mode, 32-bit read : 58 063 ins/sec 120% / 69 690 1233% / 716 444 32-bit unpaged protected mode, 32-bit write : 57 936 ins/sec 120% / 69 633 1199% / 694 753 32-bit unpaged protected mode, 32-bit read-to-ring-3 : 58 451 ins/sec 96% / 56 183 273% / 159 972 32-bit unpaged protected mode, 32-bit write-to-ring-3 : 58 962 ins/sec 99% / 58 955 298% / 175 936 real mode, 32-bit read : 58 571 ins/sec 118% / 69 478 1160% / 679 917 real mode, 32-bit write : 58 418 ins/sec 118% / 69 320 1185% / 692 513 real mode, 32-bit read-to-ring-3 : 58 072 ins/sec 96% / 55 751 274% / 159 145 real mode, 32-bit write-to-ring-3 : 57 870 ins/sec 101% / 58 755 307% / 178 042 NOP MMIO Access : PASSED SUCCESS * @endverbatim * * What we see here is: * * - The WinHv API approach is 10 to 12 times slower for exits we can * handle directly in ring-0 in the VBox AMD-V code. * * - The WinHv API approach is 2 to 3 times slower for exits we have to * go to ring-3 to handle with the VBox AMD-V code. * * - By using hypercalls and VID.SYS from ring-0 we gain between * 13% and 20% over the WinHv API on exits handled in ring-0. * * - For exits requiring ring-3 handling are between 6% slower and 3% faster * than the WinHv API. * * * As a side note, it looks like Hyper-V doesn't let the guest read CR4 but * triggers exits all the time. This isn't all that important these days since * OSes like Linux cache the CR4 value specifically to avoid these kinds of exits. * * * @subsubsection subsect_nem_win_benchmarks_bs2t1u1 17134/2018-10-02: Bootsector2-test1 * * Update on 17134. While expectantly testing a couple of newer builds (17758, * 17763) hoping for some increases in performance, the numbers turned out * altogether worse than the June test run. So, we went back to the 1803 * (17134) installation, made sure it was fully up to date (as per 2018-10-02) * and re-tested. * * The numbers had somehow turned significantly worse over the last 3-4 months, * dropping around 70% for the WinHv API test, more for Hypercalls + VID. * * @verbatim TESTING... WinHv API Hypercalls + VID VirtualBox AMD-V * 32-bit paged protected mode, CPUID : 33 270 ins/sec 33 154 real mode, CPUID : 33 534 ins/sec 32 711 [snip] 32-bit paged protected mode, RDTSC : 102 216 011 ins/sec 98 225 419 real mode, RDTSC : 102 492 243 ins/sec 98 225 419 [snip] 32-bit paged protected mode, Read CR4 : 2 096 165 ins/sec 2 123 815 real mode, Read CR4 : 2 081 047 ins/sec 2 075 151 [snip] 32-bit paged protected mode, 32-bit IN : 32 739 ins/sec 33 655 32-bit paged protected mode, 32-bit OUT : 32 702 ins/sec 33 777 32-bit paged protected mode, 32-bit IN-to-ring-3 : 32 579 ins/sec 29 985 32-bit paged protected mode, 32-bit OUT-to-ring-3 : 32 750 ins/sec 29 757 [snip] 32-bit paged protected mode, 32-bit read : 20 042 ins/sec 21 489 32-bit paged protected mode, 32-bit write : 20 036 ins/sec 21 493 32-bit paged protected mode, 32-bit read-to-ring-3 : 19 985 ins/sec 19 143 32-bit paged protected mode, 32-bit write-to-ring-3 : 19 972 ins/sec 19 595 * @endverbatim * * Suspects are security updates and/or microcode updates installed since then. * Given that the RDTSC and CR4 numbers are reasonably unchanges, it seems that * the Hyper-V core loop (in hvax64.exe) aren't affected. Our ring-0 runloop * is equally affected as the ring-3 based runloop, so it cannot be ring * switching as such (unless the ring-0 loop is borked and we didn't notice yet). * * The issue is probably in the thread / process switching area, could be * something special for hyper-V interrupt delivery or worker thread switching. * * Really wish this thread ping-pong going on in VID.SYS could be eliminated! * * * @subsubsection subsect_nem_win_benchmarks_bs2t1u2 17763: Bootsector2-test1 * * Some preliminary numbers for build 17763 on the 3.4 GHz AMD 1950X, the second * column will improve we get time to have a look the register page. * * There is a 50% performance loss here compared to the June numbers with * build 17134. The RDTSC numbers hits that it isn't in the Hyper-V core * (hvax64.exe), but something on the NT side. * * Clearing bit 20 in nt!KiSpeculationFeatures speeds things up (i.e. changing * the dword from 0x00300065 to 0x00200065 in windbg). This is checked by * nt!KePrepareToDispatchVirtualProcessor, making it a no-op if the flag is * clear. winhvr!WinHvpVpDispatchLoop call that function before making * hypercall 0xc2, which presumably does the heavy VCpu lifting in hvcax64.exe. * * @verbatim TESTING... WinHv API Hypercalls + VID clr(bit-20) + WinHv API 32-bit paged protected mode, CPUID : 54 145 ins/sec 51 436 130 076 real mode, CPUID : 54 178 ins/sec 51 713 130 449 [snip] 32-bit paged protected mode, RDTSC : 98 927 639 ins/sec 100 254 552 100 549 882 real mode, RDTSC : 99 601 206 ins/sec 100 886 699 100 470 957 [snip] 32-bit paged protected mode, 32-bit IN : 54 621 ins/sec 51 524 128 294 32-bit paged protected mode, 32-bit OUT : 54 870 ins/sec 51 671 129 397 32-bit paged protected mode, 32-bit IN-to-ring-3 : 54 624 ins/sec 43 964 127 874 32-bit paged protected mode, 32-bit OUT-to-ring-3 : 54 803 ins/sec 44 087 129 443 [snip] 32-bit paged protected mode, 32-bit read : 28 230 ins/sec 34 042 48 113 32-bit paged protected mode, 32-bit write : 27 962 ins/sec 34 050 48 069 32-bit paged protected mode, 32-bit read-to-ring-3 : 27 841 ins/sec 28 397 48 146 32-bit paged protected mode, 32-bit write-to-ring-3 : 27 896 ins/sec 29 455 47 970 * @endverbatim * * * @subsubsection subsect_nem_win_benchmarks_w2k 17134/2018-06-22: Windows 2000 Boot & Shutdown * * Timing the startup and automatic shutdown of a Windows 2000 SP4 guest serves * as a real world benchmark and example of why exit performance is import. When * Windows 2000 boots up is doing a lot of VGA redrawing of the boot animation, * which is very costly. Not having installed guest additions leaves it in a VGA * mode after the bootup sequence is done, keep up the screen access expenses, * though the graphics driver more economical than the bootvid code. * * The VM was configured to automatically logon. A startup script was installed * to perform the automatic shuting down and powering off the VM (thru * vts_shutdown.exe -f -p). An offline snapshot of the VM was taken an restored * before each test run. The test time run time is calculated from the monotonic * VBox.log timestamps, starting with the state change to 'RUNNING' and stopping * at 'POWERING_OFF'. * * The host OS and VirtualBox build is the same as for the bootsector2-test1 * scenario. * * Results: * * - WinHv API for all but physical page mappings: * 32 min 12.19 seconds * * - The default NEM/win configuration where we put the main execution loop * in ring-0, using hypercalls when we can and VID for managing execution: * 3 min 23.18 seconds * * - Regular VirtualBox using AMD-V directly, hyper-V is disabled, main * execution loop in ring-0: * 58.09 seconds * * - WinHv API with exit history based optimizations: * 58.66 seconds * * - Hypercall + VID.SYS with exit history base optimizations: * 58.94 seconds * * With a well above average machine needing over half an hour for booting a * nearly 20 year old guest kind of says it all. The 13%-20% exit performance * increase we get by using hypercalls and VID.SYS directly pays off a lot here. * The 3m23s is almost acceptable in comparison to the half an hour. * * The similarity between the last three results strongly hits at windows 2000 * doing a lot of waiting during boot and shutdown and isn't the best testcase * once a basic performance level is reached. * * * @subsubsection subsection_iem_win_benchmarks_deb9_nat Debian 9 NAT performance * * This benchmark is about network performance over NAT from a 64-bit Debian 9 * VM with a single CPU. For network performance measurements, we use our own * NetPerf tool (ValidationKit/utils/network/NetPerf.cpp) to measure latency * and throughput. * * The setups, builds and configurations are as in the previous benchmarks * (release r123172 on 1950X running 64-bit W10/17134 (2016-06-xx). Please note * that the exit optimizations hasn't yet been in tuned with NetPerf in mind. * * The NAT network setup was selected here since it's the default one and the * slowest one. There is quite a bit of IPC with worker threads and packet * processing involved. * * Latency test is first up. This is a classic back and forth between the two * NetPerf instances, where the key measurement is the roundrip latency. The * values here are the lowest result over 3-6 runs. * * Against host system: * - 152 258 ns/roundtrip - 100% - regular VirtualBox SVM * - 271 059 ns/roundtrip - 178% - Hypercalls + VID.SYS in ring-0 with exit optimizations. * - 280 149 ns/roundtrip - 184% - Hypercalls + VID.SYS in ring-0 * - 317 735 ns/roundtrip - 209% - Win HV API with exit optimizations. * - 342 440 ns/roundtrip - 225% - Win HV API * * Against a remote Windows 10 system over a 10Gbps link: * - 243 969 ns/roundtrip - 100% - regular VirtualBox SVM * - 384 427 ns/roundtrip - 158% - Win HV API with exit optimizations. * - 402 411 ns/roundtrip - 165% - Hypercalls + VID.SYS in ring-0 * - 406 313 ns/roundtrip - 167% - Win HV API * - 413 160 ns/roundtrip - 169% - Hypercalls + VID.SYS in ring-0 with exit optimizations. * * What we see here is: * * - Consistent and signficant latency increase using Hyper-V compared * to directly harnessing AMD-V ourselves. * * - When talking to the host, it's clear that the hypercalls + VID.SYS * in ring-0 method pays off. * * - When talking to a different host, the numbers are closer and it * is not longer clear which Hyper-V execution method is better. * * * Throughput benchmarks are performed by one side pushing data full throttle * for 10 seconds (minus a 1 second at each end of the test), then reversing * the roles and measuring it in the other direction. The tests ran 3-5 times * and below are the highest and lowest results in each direction. * * Receiving from host system: * - Regular VirtualBox SVM: * Max: 96 907 549 bytes/s - 100% * Min: 86 912 095 bytes/s - 100% * - Hypercalls + VID.SYS in ring-0: * Max: 84 036 544 bytes/s - 87% * Min: 64 978 112 bytes/s - 75% * - Hypercalls + VID.SYS in ring-0 with exit optimizations: * Max: 77 760 699 bytes/s - 80% * Min: 72 677 171 bytes/s - 84% * - Win HV API with exit optimizations: * Max: 64 465 905 bytes/s - 67% * Min: 62 286 369 bytes/s - 72% * - Win HV API: * Max: 62 466 631 bytes/s - 64% * Min: 61 362 782 bytes/s - 70% * * Sending to the host system: * - Regular VirtualBox SVM: * Max: 87 728 652 bytes/s - 100% * Min: 86 923 198 bytes/s - 100% * - Hypercalls + VID.SYS in ring-0: * Max: 84 280 749 bytes/s - 96% * Min: 78 369 842 bytes/s - 90% * - Hypercalls + VID.SYS in ring-0 with exit optimizations: * Max: 84 119 932 bytes/s - 96% * Min: 77 396 811 bytes/s - 89% * - Win HV API: * Max: 81 714 377 bytes/s - 93% * Min: 78 697 419 bytes/s - 91% * - Win HV API with exit optimizations: * Max: 80 502 488 bytes/s - 91% * Min: 71 164 978 bytes/s - 82% * * Receiving from a remote Windows 10 system over a 10Gbps link: * - Hypercalls + VID.SYS in ring-0: * Max: 115 346 922 bytes/s - 136% * Min: 112 912 035 bytes/s - 137% * - Regular VirtualBox SVM: * Max: 84 517 504 bytes/s - 100% * Min: 82 597 049 bytes/s - 100% * - Hypercalls + VID.SYS in ring-0 with exit optimizations: * Max: 77 736 251 bytes/s - 92% * Min: 73 813 784 bytes/s - 89% * - Win HV API with exit optimizations: * Max: 63 035 587 bytes/s - 75% * Min: 57 538 380 bytes/s - 70% * - Win HV API: * Max: 62 279 185 bytes/s - 74% * Min: 56 813 866 bytes/s - 69% * * Sending to a remote Windows 10 system over a 10Gbps link: * - Win HV API with exit optimizations: * Max: 116 502 357 bytes/s - 103% * Min: 49 046 550 bytes/s - 59% * - Regular VirtualBox SVM: * Max: 113 030 991 bytes/s - 100% * Min: 83 059 511 bytes/s - 100% * - Hypercalls + VID.SYS in ring-0: * Max: 106 435 031 bytes/s - 94% * Min: 47 253 510 bytes/s - 57% * - Hypercalls + VID.SYS in ring-0 with exit optimizations: * Max: 94 842 287 bytes/s - 84% * Min: 68 362 172 bytes/s - 82% * - Win HV API: * Max: 65 165 225 bytes/s - 58% * Min: 47 246 573 bytes/s - 57% * * What we see here is: * * - Again consistent numbers when talking to the host. Showing that the * ring-0 approach is preferable to the ring-3 one. * * - Again when talking to a remote host, things get more difficult to * make sense of. The spread is larger and direct AMD-V gets beaten by * a different the Hyper-V approaches in each direction. * * - However, if we treat the first entry (remote host) as weird spikes, the * other entries are consistently worse compared to direct AMD-V. For the * send case we get really bad results for WinHV. * */