Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1768 insertions, 0 deletions

diff --git a/include/iprt/nt/hyperv.h b/include/iprt/nt/hyperv.h
new file mode 100644
index 00000000..aa461a35
--- /dev/null
+++ b/include/iprt/nt/hyperv.h
@@ -0,0 +1,1768 @@
+/** @file
+ * Hyper-V related types and definitions.
+ */
+
+/*
+ * Copyright (C) 2018-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef IPRT_INCLUDED_nt_hyperv_h
+#define IPRT_INCLUDED_nt_hyperv_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+
+#ifndef IN_IDA_PRO
+# include <iprt/types.h>
+# include <iprt/assertcompile.h>
+#else
+# define RT_FLEXIBLE_ARRAY
+# define RT_FLEXIBLE_ARRAY_EXTENSION
+# define AssertCompile(expr)
+# define AssertCompileSize(type, size)
+# define AssertCompileMemberOffset(type, member, off)
+typedef unsigned char uint8_t;
+typedef unsigned __int32 uint32_t;
+typedef unsigned __int64 uint64_t;
+#endif
+
+
+/** Hyper-V partition ID. */
+typedef uint64_t HV_PARTITION_ID;
+/** Invalid Hyper-V partition ID. */
+#define HV_PARTITION_ID_INVALID UINT64_C(0)
+/** Hyper-V virtual processor index (== VMCPUID). */
+typedef uint32_t HV_VP_INDEX;
+/** Guest physical address (== RTGCPHYS). */
+typedef uint64_t HV_GPA;
+/** Guest physical page number. */
+typedef uint64_t HV_GPA_PAGE_NUMBER;
+/** System(/parent) physical page number. */
+typedef uint64_t HV_SPA_PAGE_NUMBER;
+/** Hyper-V unsigned 128-bit integer type.   */
+typedef struct { uint64_t Low64, High64; } HV_UINT128;
+/** Hyper-V port ID. */
+typedef union
+{
+    uint32_t        AsUINT32;
+    struct
+    {
+        uint32_t    Id       : 24;
+        uint32_t    Reserved : 8;
+    };
+} HV_PORT_ID;
+/** Pointer to a Hyper-V port ID. */
+typedef HV_PORT_ID *PHV_PORT_ID;
+
+
+/**
+ * Hypercall IDs.
+ */
+typedef enum
+{
+    HvCallReserved0000 = 0,
+
+    HvCallSwitchVirtualAddressSpace,
+    HvCallFlushVirtualAddressSpace,
+    HvCallFlushVirtualAddressList,
+    HvCallGetLogicalProcessorRunTime,
+    /* 5, 6 & 7 are deprecated / reserved. */
+    HvCallNotifyLongSpinWait = 8,
+    HvCallParkLogicalProcessors,        /**< @since v2 */
+    HvCallInvokeHypervisorDebugger,     /**< @since v2 - not mentioned in TLFS v5.0b  */
+    HvCallSendSyntheticClusterIpi,      /**< @since v? */
+    HvCallModifyVtlProtectionMask,      /**< @since v? */
+    HvCallEnablePartitionVtl,           /**< @since v? */
+    HvCallDisablePartitionVtl,          /**< @since v? */
+    HvCallEnableVpVtl,                  /**< @since v? */
+    HvCallDisableVpVtl,                 /**< @since v? */
+    HvCallVtlCall,                      /**< @since v? */
+    HvCallVtlReturn,                    /**< @since v? */
+    HvCallFlushVirtualAddressSpaceEx,   /**< @since v? */
+    HvCallFlushVirtualAddressListEx,    /**< @since v? */
+    HvCallSendSyntheticClusterIpiEx,    /**< @since v? */
+    /* Reserved: 0x16..0x3f */
+
+    HvCallCreatePartition = 0x40,
+    HvCallInitializePartition,
+    HvCallFinalizePartition,
+    HvCallDeletePartition,
+    HvCallGetPartitionProperty,
+    HvCallSetPartitionProperty,
+    HvCallGetPartitionId,
+    HvCallGetNextChildPartition,
+    HvCallDepositMemory,                /**< 0x48 - Repeat call. */
+    HvCallWithdrawMemory,               /**< 0x49 - Repeat call. */
+    HvCallGetMemoryBalance,
+    HvCallMapGpaPages,                  /**< 0X4b - Repeat call. */
+    HvCallUnmapGpaPages,                /**< 0X4c - Repeat call. */
+    HvCallInstallIntercept,
+    HvCallCreateVp,
+    HvCallDeleteVp,                     /**< 0x4f - Fast call.  */
+    HvCallGetVpRegisters,               /**< 0x50 - Repeat call. */
+    HvCallSetVpRegisters,               /**< 0x51 - Repeat call. */
+    HvCallTranslateVirtualAddress,
+    HvCallReadGpa,
+    HvCallWriteGpa,
+    HvCallAssertVirtualInterruptV1,
+    HvCallClearVirtualInterrupt,        /**< 0x56 - Fast call. */
+    HvCallCreatePortV1,
+    HvCallDeletePort,                   /**< 0x58 - Fast call. */
+    HvCallConnectPortV1,
+    HvCallGetPortProperty,
+    HvCallDisconnectPort,
+    HvCallPostMessage,
+    HvCallSignalEvent,
+    HvCallSavePartitionState,
+    HvCallRestorePartitionState,
+    HvCallInitializeEventLogBufferGroup,
+    HvCallFinalizeEventLogBufferGroup,
+    HvCallCreateEventLogBuffer,
+    HvCallDeleteEventLogBuffer,
+    HvCallMapEventLogBuffer,
+    HvCallUnmapEventLogBuffer,
+    HvCallSetEventLogGroupSources,
+    HvCallReleaseEventLogBuffer,
+    HvCallFlushEventLogBuffer,
+    HvCallPostDebugData,
+    HvCallRetrieveDebugData,
+    HvCallResetDebugSession,
+    HvCallMapStatsPage,
+    HvCallUnmapStatsPage,
+    HvCallMapSparseGpaPages,            /**< @since v2 */
+    HvCallSetSystemProperty,            /**< @since v2 */
+    HvCallSetPortProperty,              /**< @since v2 */
+    /* 0x71..0x75 reserved/deprecated (was v2 test IDs). */
+    HvCallAddLogicalProcessor = 0x76,
+    HvCallRemoveLogicalProcessor,
+    HvCallQueryNumaDistance,
+    HvCallSetLogicalProcessorProperty,
+    HvCallGetLogicalProcessorProperty,
+    HvCallGetSystemProperty,
+    HvCallMapDeviceInterrupt,
+    HvCallUnmapDeviceInterrupt,
+    HvCallRetargetDeviceInterrupt,
+    /* 0x7f is reserved. */
+    HvCallMapDevicePages = 0x80,
+    HvCallUnmapDevicePages,
+    HvCallAttachDevice,
+    HvCallDetachDevice,
+    HvCallNotifyStandbyTransition,
+    HvCallPrepareForSleep,
+    HvCallPrepareForHibernate,
+    HvCallNotifyPartitionEvent,
+    HvCallGetLogicalProcessorRegisters,
+    HvCallSetLogicalProcessorRegisters,
+    HvCallQueryAssociatedLpsforMca,
+    HvCallNotifyRingEmpty,
+    HvCallInjectSyntheticMachineCheck,
+    HvCallScrubPartition,
+    HvCallCollectLivedump,
+    HvCallDisableHypervisor,
+    HvCallModifySparseGpaPages,
+    HvCallRegisterInterceptResult,
+    HvCallUnregisterInterceptResult,
+    /* 0x93 is reserved/undocumented. */
+    HvCallAssertVirtualInterrupt = 0x94,
+    HvCallCreatePort,
+    HvCallConnectPort,
+    HvCallGetSpaPageList,
+    /* 0x98 is reserved. */
+    HvCallStartVirtualProcessor = 0x99,
+    HvCallGetVpIndexFromApicId,
+    /* 0x9b..0xae are reserved/undocumented.
+       0xad: New version of HvCallGetVpRegisters? Perhaps on logical CPU or smth. */
+    HvCallFlushGuestPhysicalAddressSpace = 0xaf,
+    HvCallFlushGuestPhysicalAddressList,
+    /* 0xb1..0xb4 are unknown */
+    HvCallCreateCpuGroup = 0xb5,
+    HvCallDeleteCpuGroup,
+    HvCallGetCpuGroupProperty,
+    HvCallSetCpuGroupProperty,
+    HvCallGetCpuGroupAffinit,
+    HvCallGetNextCpuGroup = 0xba,
+    HvCallGetNextCpuGroupPartition,
+    HvCallPrecommitGpaPages = 0xbe,
+    HvCallUncommitGpaPages,             /**< Happens when VidDestroyGpaRangeCheckSecure/WHvUnmapGpaRange is called. */
+    /* 0xc0 is unknown */
+    HvCallVpRunloopRelated = 0xc2,      /**< Fast */
+    /* 0xc3..0xcb are unknown */
+    HvCallQueryVtlProtectionMaskRange = 0xcc,
+    HvCallModifyVtlProtectionMaskRange,
+    /* 0xce..0xd1 are unknown */
+    HvCallAcquireSparseGpaPageHostAccess = 0xd2,
+    HvCallReleaseSparseGpaPageHostAccess,
+    HvCallCheckSparseGpaPageVtlAccess,
+    HvCallAcquireSparseSpaPageHostAccess = 0xd7,
+    HvCallReleaseSparseSpaPageHostAccess,
+    HvCallAcceptGpaPages,                       /**< 0x18 byte input, zero rep, no output. */
+    /* 0xda..0xe0 are unknown (not dug out yet) */
+    HvCallMapVpRegisterPage = 0xe1,             /**< Takes partition id + VP index (16 bytes). Returns a physical address (8 bytes). */
+    HvCallUnmapVpRegisterPage,                  /**< Takes partition id + VP index. */
+    HvCallUnknownE3,
+    HvCallUnknownE4,
+    HvCallUnknownE5,
+    HvCallUnknownE6,
+    /** Number of defined hypercalls (varies with version). */
+    HvCallCount
+} HV_CALL_CODE;
+AssertCompile(HvCallSendSyntheticClusterIpiEx == 0x15);
+AssertCompile(HvCallMapGpaPages == 0x4b);
+AssertCompile(HvCallSetPortProperty == 0x70);
+AssertCompile(HvCallRetargetDeviceInterrupt == 0x7e);
+AssertCompile(HvCallUnregisterInterceptResult == 0x92);
+AssertCompile(HvCallGetSpaPageList == 0x97);
+AssertCompile(HvCallFlushGuestPhysicalAddressList == 0xb0);
+AssertCompile(HvCallUncommitGpaPages == 0xbf);
+AssertCompile(HvCallCount == 0xe7);
+
+/** Makes the first parameter to a hypercall (rcx).  */
+#define HV_MAKE_CALL_INFO(a_enmCallCode, a_cReps) ( (uint64_t)(a_enmCallCode) | ((uint64_t)(a_cReps) << 32) )
+/** Makes the return value (success) for a rep hypercall. */
+#define HV_MAKE_CALL_REP_RET(a_cReps)    ((uint64_t)(a_cReps) << 32)
+
+/** Hypercall status code. */
+typedef uint16_t HV_STATUS;
+
+/** @name Hyper-V Hypercall status codes
+ * @{ */
+#define HV_STATUS_SUCCESS                                               (0x0000)
+#define HV_STATUS_RESERVED_1                                            (0x0001)
+#define HV_STATUS_INVALID_HYPERCALL_CODE                                (0x0002)
+#define HV_STATUS_INVALID_HYPERCALL_INPUT                               (0x0003)
+#define HV_STATUS_INVALID_ALIGNMENT                                     (0x0004)
+#define HV_STATUS_INVALID_PARAMETER                                     (0x0005)
+#define HV_STATUS_ACCESS_DENIED                                         (0x0006)
+#define HV_STATUS_INVALID_PARTITION_STATE                               (0x0007)
+#define HV_STATUS_OPERATION_DENIED                                      (0x0008)
+#define HV_STATUS_UNKNOWN_PROPERTY                                      (0x0009)
+#define HV_STATUS_PROPERTY_VALUE_OUT_OF_RANGE                           (0x000a)
+#define HV_STATUS_INSUFFICIENT_MEMORY                                   (0x000b)
+#define HV_STATUS_PARTITION_TOO_DEEP                                    (0x000c)
+#define HV_STATUS_INVALID_PARTITION_ID                                  (0x000d)
+#define HV_STATUS_INVALID_VP_INDEX                                      (0x000e)
+#define HV_STATUS_RESERVED_F                                            (0x000f)
+#define HV_STATUS_NOT_FOUND                                             (0x0010)
+#define HV_STATUS_INVALID_PORT_ID                                       (0x0011)
+#define HV_STATUS_INVALID_CONNECTION_ID                                 (0x0012)
+#define HV_STATUS_INSUFFICIENT_BUFFERS                                  (0x0013)
+#define HV_STATUS_NOT_ACKNOWLEDGED                                      (0x0014)
+#define HV_STATUS_INVALID_VP_STATE                                      (0x0015)
+#define HV_STATUS_ACKNOWLEDGED                                          (0x0016)
+#define HV_STATUS_INVALID_SAVE_RESTORE_STATE                            (0x0017)
+#define HV_STATUS_INVALID_SYNIC_STATE                                   (0x0018)
+#define HV_STATUS_OBJECT_IN_USE                                         (0x0019)
+#define HV_STATUS_INVALID_PROXIMITY_DOMAIN_INFO                         (0x001a)
+#define HV_STATUS_NO_DATA                                               (0x001b)
+#define HV_STATUS_INACTIVE                                              (0x001c)
+#define HV_STATUS_NO_RESOURCES                                          (0x001d)
+#define HV_STATUS_FEATURE_UNAVAILABLE                                   (0x001e)
+#define HV_STATUS_PARTIAL_PACKET                                        (0x001f)
+#define HV_STATUS_PROCESSOR_FEATURE_SSE3_NOT_SUPPORTED                  (0x0020)
+#define HV_STATUS_PROCESSOR_FEATURE_LAHFSAHF_NOT_SUPPORTED              (0x0021)
+#define HV_STATUS_PROCESSOR_FEATURE_SSSE3_NOT_SUPPORTED                 (0x0022)
+#define HV_STATUS_PROCESSOR_FEATURE_SSE4_1_NOT_SUPPORTED                (0x0023)
+#define HV_STATUS_PROCESSOR_FEATURE_SSE4_2_NOT_SUPPORTED                (0x0024)
+#define HV_STATUS_PROCESSOR_FEATURE_SSE4A_NOT_SUPPORTED                 (0x0025)
+#define HV_STATUS_PROCESSOR_FEATURE_XOP_NOT_SUPPORTED                   (0x0026)
+#define HV_STATUS_PROCESSOR_FEATURE_POPCNT_NOT_SUPPORTED                (0x0027)
+#define HV_STATUS_PROCESSOR_FEATURE_CMPXCHG16B_NOT_SUPPORTED            (0x0028)
+#define HV_STATUS_PROCESSOR_FEATURE_ALTMOVCR8_NOT_SUPPORTED             (0x0029)
+#define HV_STATUS_PROCESSOR_FEATURE_LZCNT_NOT_SUPPORTED                 (0x002a)
+#define HV_STATUS_PROCESSOR_FEATURE_MISALIGNED_SSE_NOT_SUPPORTED        (0x002b)
+#define HV_STATUS_PROCESSOR_FEATURE_MMX_EXT_NOT_SUPPORTED               (0x002c)
+#define HV_STATUS_PROCESSOR_FEATURE_3DNOW_NOT_SUPPORTED                 (0x002d)
+#define HV_STATUS_PROCESSOR_FEATURE_EXTENDED_3DNOW_NOT_SUPPORTED        (0x002e)
+#define HV_STATUS_PROCESSOR_FEATURE_PAGE_1GB_NOT_SUPPORTED              (0x002f)
+#define HV_STATUS_PROCESSOR_CACHE_LINE_FLUSH_SIZE_INCOMPATIBLE          (0x0030)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVE_NOT_SUPPORTED                 (0x0031)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVEOPT_NOT_SUPPORTED              (0x0032)
+#define HV_STATUS_INSUFFICIENT_BUFFER                                   (0x0033)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVE_AVX_NOT_SUPPORTED             (0x0034)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVE_ FEATURE_NOT_SUPPORTED        (0x0035)
+#define HV_STATUS_PROCESSOR_XSAVE_SAVE_AREA_INCOMPATIBLE                (0x0036)
+#define HV_STATUS_INCOMPATIBLE_PROCESSOR                                (0x0037)
+#define HV_STATUS_INSUFFICIENT_DEVICE_DOMAINS                           (0x0038)
+#define HV_STATUS_PROCESSOR_FEATURE_AES_NOT_SUPPORTED                   (0x0039)
+#define HV_STATUS_PROCESSOR_FEATURE_PCLMULQDQ_NOT_SUPPORTED             (0x003a)
+#define HV_STATUS_PROCESSOR_FEATURE_INCOMPATIBLE_XSAVE_FEATURES         (0x003b)
+#define HV_STATUS_CPUID_FEATURE_VALIDATION_ERROR                        (0x003c)
+#define HV_STATUS_CPUID_XSAVE_FEATURE_VALIDATION_ERROR                  (0x003d)
+#define HV_STATUS_PROCESSOR_STARTUP_TIMEOUT                             (0x003e)
+#define HV_STATUS_SMX_ENABLED                                           (0x003f)
+#define HV_STATUS_PROCESSOR_FEATURE_PCID_NOT_SUPPORTED                  (0x0040)
+#define HV_STATUS_INVALID_LP_INDEX                                      (0x0041)
+#define HV_STATUS_FEATURE_FMA4_NOT_SUPPORTED                            (0x0042)
+#define HV_STATUS_FEATURE_F16C_NOT_SUPPORTED                            (0x0043)
+#define HV_STATUS_PROCESSOR_FEATURE_RDRAND_NOT_SUPPORTED                (0x0044)
+#define HV_STATUS_PROCESSOR_FEATURE_RDWRFSGS_NOT_SUPPORTED              (0x0045)
+#define HV_STATUS_PROCESSOR_FEATURE_SMEP_NOT_SUPPORTED                  (0x0046)
+#define HV_STATUS_PROCESSOR_FEATURE_ENHANCED_FAST_STRING_NOT_SUPPORTED  (0x0047)
+#define HV_STATUS_PROCESSOR_FEATURE_MOVBE_NOT_SUPPORTED                 (0x0048)
+#define HV_STATUS_PROCESSOR_FEATURE_BMI1_NOT_SUPPORTED                  (0x0049)
+#define HV_STATUS_PROCESSOR_FEATURE_BMI2_NOT_SUPPORTED                  (0x004a)
+#define HV_STATUS_PROCESSOR_FEATURE_HLE_NOT_SUPPORTED                   (0x004b)
+#define HV_STATUS_PROCESSOR_FEATURE_RTM_NOT_SUPPORTED                   (0x004c)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVE_FMA_NOT_SUPPORTED             (0x004d)
+#define HV_STATUS_PROCESSOR_FEATURE_XSAVE_AVX2_NOT_SUPPORTED            (0x004e)
+#define HV_STATUS_PROCESSOR_FEATURE_NPIEP1_NOT_SUPPORTED                (0x004f)
+#define HV_STATUS_INVALID_REGISTER_VALUE                                (0x0050)
+#define HV_STATUS_PROCESSOR_FEATURE_RDSEED_NOT_SUPPORTED                (0x0052)
+#define HV_STATUS_PROCESSOR_FEATURE_ADX_NOT_SUPPORTED                   (0x0053)
+#define HV_STATUS_PROCESSOR_FEATURE_SMAP_NOT_SUPPORTED                  (0x0054)
+#define HV_STATUS_NX_NOT_DETECTED                                       (0x0055)
+#define HV_STATUS_PROCESSOR_FEATURE_INTEL_PREFETCH_NOT_SUPPORTED        (0x0056)
+#define HV_STATUS_INVALID_DEVICE_ID                                     (0x0057)
+#define HV_STATUS_INVALID_DEVICE_STATE                                  (0x0058)
+#define HV_STATUS_PENDING_PAGE_REQUESTS                                 (0x0059)
+#define HV_STATUS_PAGE_REQUEST_INVALID                                  (0x0060)
+#define HV_STATUS_OPERATION_FAILED                                      (0x0071)
+#define HV_STATUS_NOT_ALLOWED_WITH_NESTED_VIRT_ACTIVE                   (0x0072)
+/** @} */
+
+
+/** Hyper-V partition property value. */
+typedef uint64_t HV_PARTITION_PROPERTY;
+/** Pointer to a partition property value. */
+typedef HV_PARTITION_PROPERTY *PHV_PARTITION_PROPERTY;
+/**
+ * Hyper-V partition property code.
+ * This is documented in TLFS, except version 5.x.
+ */
+typedef enum
+{
+    HvPartitionPropertyPrivilegeFlags = 0x00010000,
+    HvPartitionPropertySyntheticProcessorFeaturesBanks, /**< Read by WHvApi::Capabilities::GetSyntheticProcessorFeaturesBanks (build 22000) */
+
+    HvPartitionPropertyCpuReserve = 0x00020001,
+    HvPartitionPropertyCpuCap,
+    HvPartitionPropertyCpuWeight,
+    HvPartitionPropertyUnknown20004,                /**< On exo partition (build 17134), initial value zero. */
+
+    HvPartitionPropertyEmulatedTimerPeriod = 0x00030000, /**< @note Fails on exo partition (build 17134). */
+    HvPartitionPropertyEmulatedTimerControl,        /**< @note Fails on exo partition (build 17134). */
+    HvPartitionPropertyPmTimerAssist,               /**< @note Fails on exo partition (build 17134). */
+    HvPartitionPropertyUnknown30003,                /**< @note WHvSetupPartition writes this (build 22000). */
+    HvPartitionPropertyUnknown30004,                /**< ? */
+    HvPartitionPropertyUnknown30005,                /**< WHvPartitionPropertyCodeReferenceTime maps to this (build 22000) */
+
+    HvPartitionPropertyDebugChannelId = 0x00040000, /**< @note Hangs system on exo partition hangs (build 17134). */
+
+    HvPartitionPropertyVirtualTlbPageCount = 0x00050000,
+    HvPartitionPropertyUnknown50001,                /**< On exo partition (build 17134), initial value zero. */
+    HvPartitionPropertyUnknown50002,                /**< On exo partition (build 17134), initial value zero. */
+    HvPartitionPropertyUnknown50003,                /**< On exo partition (build 17134), initial value zero. */
+    HvPartitionPropertyUnknown50004,                /**< On exo partition (build 17134), initial value zero. */
+    HvPartitionPropertyUnknown50005,                /**< On exo partition (build 17134), initial value one. */
+    HvPartitionPropertyUnknown50006,                /**< On exo partition (build 17134), initial value zero.
+                                                     * @note build 22000/w11-ga fends this off in VID.SYS. */
+    HvPartitionPropertyUnknown50007,
+    HvPartitionPropertyUnknown50008,
+    HvPartitionPropertyUnknown50009,
+    HvPartitionPropertyUnknown5000a,
+    HvPartitionPropertyUnknown5000b,
+    HvPartitionPropertyUnknown5000c,
+    HvPartitionPropertyUnknown5000d,
+    HvPartitionPropertyUnknown5000e,
+    HvPartitionPropertyUnknown5000f,
+    HvPartitionPropertyUnknown50010,
+    HvPartitionPropertyUnknown50012,
+    HvPartitionPropertyUnknown50013,                /**< Set by WHvSetupPartition (build 22000) */
+    HvPartitionPropertyUnknown50014,
+    HvPartitionPropertyUnknown50015,
+    HvPartitionPropertyUnknown50016,
+    HvPartitionPropertyUnknown50017,                /**< Set by WHvSetupPartition (build 22000) */
+
+    HvPartitionPropertyProcessorVendor = 0x00060000,
+    HvPartitionPropertyProcessorFeatures,           /**< On exo/17134/threadripper: 0x6cb26f39fbf */
+    HvPartitionPropertyProcessorXsaveFeatures,
+    HvPartitionPropertyProcessorCLFlushSize,        /**< On exo/17134/threadripper: 8 */
+    HvPartitionPropertyUnknown60004,                /**< On exo partition (build 17134), initial value zero. */
+    HvPartitionPropertyUnknown60005,                /**< On exo partition (build 17134), initial value 0x603. */
+    HvPartitionPropertyUnknown60006,                /**< On exo partition (build 17134), initial value 0x2c. */
+    HvPartitionPropertyUnknown60007,                /**< WHvSetupPartition reads this (build 22000). */
+    HvPartitionPropertyUnknown60008,                /**< WHvSetupPartition reads this (build 22000). */
+    HvPartitionPropertyProcessorClockFrequency,     /**< Read by WHvApi::Capabilities::GetProcessorClockFrequency (build 22000). */
+    HvPartitionPropertyProcessorFeaturesBank0,      /**< Read by WHvApi::Capabilities::GetProcessorFeaturesBanks (build 22000). */
+    HvPartitionPropertyProcessorFeaturesBank1,      /**< Read by WHvApi::Capabilities::GetProcessorFeaturesBanks (build 22000). */
+
+    HvPartitionPropertyGuestOsId = 0x00070000,      /**< @since v4 */
+
+    HvPartitionPropertyUnknown800000 = 0x00080000   /**< On exo partition (build 17134), initial value zero. */
+} HV_PARTITION_PROPERTY_CODE;
+AssertCompileSize(HV_PARTITION_PROPERTY_CODE, 4);
+/** Pointer to a partition property code. */
+typedef HV_PARTITION_PROPERTY_CODE *PHV_PARTITION_PROPERTY_CODE;
+
+
+/** Input for HvCallGetPartitionProperty. */
+typedef struct
+{
+    HV_PARTITION_ID             PartitionId;
+    HV_PARTITION_PROPERTY_CODE  PropertyCode;
+    uint32_t                    uPadding;
+} HV_INPUT_GET_PARTITION_PROPERTY;
+AssertCompileSize(HV_INPUT_GET_PARTITION_PROPERTY, 16);
+/** Pointer to input for HvCallGetPartitionProperty. */
+typedef HV_INPUT_GET_PARTITION_PROPERTY *PHV_INPUT_GET_PARTITION_PROPERTY;
+
+/** Output for HvCallGetPartitionProperty. */
+typedef struct
+{
+    HV_PARTITION_PROPERTY       PropertyValue;
+} HV_OUTPUT_GET_PARTITION_PROPERTY;
+/** Pointer to output for HvCallGetPartitionProperty. */
+typedef HV_OUTPUT_GET_PARTITION_PROPERTY *PHV_OUTPUT_GET_PARTITION_PROPERTY;
+
+
+/** Input for HvCallSetPartitionProperty. */
+typedef struct
+{
+    HV_PARTITION_ID             PartitionId;
+    HV_PARTITION_PROPERTY_CODE  PropertyCode;
+    uint32_t                    uPadding;
+    HV_PARTITION_PROPERTY       PropertyValue;
+} HV_INPUT_SET_PARTITION_PROPERTY;
+AssertCompileSize(HV_INPUT_SET_PARTITION_PROPERTY, 24);
+/** Pointer to input for HvCallSetPartitionProperty. */
+typedef HV_INPUT_SET_PARTITION_PROPERTY *PHV_INPUT_SET_PARTITION_PROPERTY;
+
+
+/** Hyper-V NUMA node ID.
+ * On systems without NUMA, i.e. a single node, it uses 0 as identifier.  */
+typedef uint32_t HV_PROXIMITY_DOMAIN_ID;
+/** Pointer to NUMA node ID. */
+typedef HV_PROXIMITY_DOMAIN_ID *PHV_PROXIMITY_DOMAIN_ID;
+
+/** Hyper-V NUMA flags. */
+typedef struct
+{
+    uint32_t    ProximityPreferred      : 1;    /**< When set, allocations may come from other NUMA nodes.  */
+    uint32_t    Reserved                : 30;   /**< Reserved for future (as of circa v2). */
+    uint32_t    ProxyimityInfoValid     : 1;    /**< Set if the NUMA information is valid. */
+} HV_PROXIMITY_DOMAIN_FLAGS;
+/** Pointer to Hyper-V NUMA flags. */
+typedef HV_PROXIMITY_DOMAIN_FLAGS *PHV_PROXIMITY_DOMAIN_FLAGS;
+
+/** Hyper-V NUMA information. */
+typedef struct
+{
+    HV_PROXIMITY_DOMAIN_ID      Id;             /**< NUMA node identifier.  */
+    HV_PROXIMITY_DOMAIN_FLAGS   Flags;          /**< NUMA flags. */
+} HV_PROXIMITY_DOMAIN_INFO;
+/** Pointer to Hyper-V NUMA information. */
+typedef HV_PROXIMITY_DOMAIN_INFO *PHV_PROXIMITY_DOMAIN_INFO;
+
+/** Input for HvCallGetMemoryBalance. */
+typedef struct
+{
+    HV_PARTITION_ID             TargetPartitionId;
+    HV_PROXIMITY_DOMAIN_INFO    ProximityDomainInfo;
+} HV_INPUT_GET_MEMORY_BALANCE;
+AssertCompileSize(HV_INPUT_GET_MEMORY_BALANCE, 16);
+/** Pointer to the input for HvCallGetMemoryBalance. */
+typedef HV_INPUT_GET_MEMORY_BALANCE *PHV_INPUT_GET_MEMORY_BALANCE;
+
+/** Output for HvCallGetMemoryBalance. */
+typedef struct
+{
+    uint64_t                    PagesAvailable;
+    uint64_t                    PagesInUse;
+} HV_OUTPUT_GET_MEMORY_BALANCE;
+/** Pointer to the output for HvCallGetMemoryBalance. */
+typedef HV_OUTPUT_GET_MEMORY_BALANCE *PHV_OUTPUT_GET_MEMORY_BALANCE;
+
+
+/** @name Flags used with HvCallMapGpaPages and HvCallMapSparseGpaPages.
+ * @note There seems to be a more flags defined after v2.
+ * @{ */
+typedef uint32_t HV_MAP_GPA_FLAGS;
+#define HV_MAP_GPA_READABLE             UINT32_C(0x0001)
+#define HV_MAP_GPA_WRITABLE             UINT32_C(0x0002)
+#define HV_MAP_GPA_EXECUTABLE           UINT32_C(0x0004)
+/** Seems this have to be set when HV_MAP_GPA_EXECUTABLE is (17101). */
+#define HV_MAP_GPA_EXECUTABLE_AGAIN     UINT32_C(0x0008)
+/** Dunno what this is yet, but it requires HV_MAP_GPA_DUNNO_1000.
+ * The readable bit gets put here when both HV_MAP_GPA_DUNNO_1000 and
+ * HV_MAP_GPA_DUNNO_MASK_0700 are clear. */
+#define HV_MAP_GPA_DUNNO_ACCESS         UINT32_C(0x0010)
+/** Guess work. */
+#define HV_MAP_GPA_MAYBE_ACCESS_MASK    UINT32_C(0x001f)
+/** Some kind of mask. */
+#define HV_MAP_GPA_DUNNO_MASK_0700      UINT32_C(0x0700)
+/** Dunno what this is, but required for HV_MAP_GPA_DUNNO_ACCESS. */
+#define HV_MAP_GPA_DUNNO_1000           UINT32_C(0x1000)
+/** Working with large 2MB pages. */
+#define HV_MAP_GPA_LARGE                UINT32_C(0x2000)
+/** Valid mask as per build 17101. */
+#define HV_MAP_GPA_VALID_MASK           UINT32_C(0x7f1f)
+/** @}  */
+
+/** Input for HvCallMapGpaPages. */
+typedef struct
+{
+    HV_PARTITION_ID     TargetPartitionId;
+    HV_GPA_PAGE_NUMBER  TargetGpaBase;
+    HV_MAP_GPA_FLAGS    MapFlags;
+    uint32_t            u32ExplicitPadding;
+    /* The repeating part: */
+    RT_FLEXIBLE_ARRAY_EXTENSION
+    HV_SPA_PAGE_NUMBER  PageList[RT_FLEXIBLE_ARRAY];
+} HV_INPUT_MAP_GPA_PAGES;
+AssertCompileMemberOffset(HV_INPUT_MAP_GPA_PAGES, PageList, 24);
+/** Pointer to the input for HvCallMapGpaPages. */
+typedef HV_INPUT_MAP_GPA_PAGES *PHV_INPUT_MAP_GPA_PAGES;
+
+
+/** A parent to guest mapping pair for HvCallMapSparseGpaPages. */
+typedef struct
+{
+    HV_GPA_PAGE_NUMBER TargetGpaPageNumber;
+    HV_SPA_PAGE_NUMBER SourceSpaPageNumber;
+} HV_GPA_MAPPING;
+/** Pointer to a parent->guest mapping pair for HvCallMapSparseGpaPages. */
+typedef HV_GPA_MAPPING *PHV_GPA_MAPPING;
+
+/** Input for HvCallMapSparseGpaPages. */
+typedef struct
+{
+    HV_PARTITION_ID     TargetPartitionId;
+    HV_MAP_GPA_FLAGS    MapFlags;
+    uint32_t            u32ExplicitPadding;
+    /* The repeating part: */
+    RT_FLEXIBLE_ARRAY_EXTENSION
+    HV_GPA_MAPPING      PageList[RT_FLEXIBLE_ARRAY];
+} HV_INPUT_MAP_SPARSE_GPA_PAGES;
+AssertCompileMemberOffset(HV_INPUT_MAP_SPARSE_GPA_PAGES, PageList, 16);
+/** Pointer to the input for HvCallMapSparseGpaPages. */
+typedef HV_INPUT_MAP_SPARSE_GPA_PAGES *PHV_INPUT_MAP_SPARSE_GPA_PAGES;
+
+
+/** Input for HvCallUnmapGpaPages. */
+typedef struct
+{
+    HV_PARTITION_ID     TargetPartitionId;
+    HV_GPA_PAGE_NUMBER  TargetGpaBase;
+    /** This field is either an omission in the 7600 WDK or a later additions.
+     *  Anyway, not quite sure what it does.  Bit 2 seems to indicate 2MB pages. */
+    uint64_t            fFlags;
+} HV_INPUT_UNMAP_GPA_PAGES;
+AssertCompileSize(HV_INPUT_UNMAP_GPA_PAGES, 24);
+/** Pointer to the input for HvCallUnmapGpaPages. */
+typedef HV_INPUT_UNMAP_GPA_PAGES *PHV_INPUT_UNMAP_GPA_PAGES;
+
+
+
+/** Cache types used by HvCallReadGpa and HvCallWriteGpa. */
+typedef enum
+{
+    HvCacheTypeX64Uncached = 0,
+    HvCacheTypeX64WriteCombining,
+    /* 2 & 3 are undefined. */
+    HvCacheTypeX64WriteThrough = 4,
+    HvCacheTypeX64WriteProtected,
+    HvCacheTypeX64WriteBack
+} HV_CACHE_TYPE;
+
+/** Control flags for HvCallReadGpa and HvCallWriteGpa. */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint64_t        CacheType : 8;      /**< HV_CACHE_TYPE */
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved  : 56;
+#endif
+    };
+} HV_ACCESS_GPA_CONTROL_FLAGS;
+
+/** Results codes for HvCallReadGpa and HvCallWriteGpa. */
+typedef enum
+{
+    HvAccessGpaSuccess = 0,
+    HvAccessGpaUnmapped,
+    HvAccessGpaReadIntercept,
+    HvAccessGpaWriteIntercept,
+    HvAccessGpaIllegalOverlayAccess
+} HV_ACCESS_GPA_RESULT_CODE;
+
+/** The result of HvCallReadGpa and HvCallWriteGpa. */
+typedef union
+{
+    uint64_t                        AsUINT64;
+    struct
+    {
+        HV_ACCESS_GPA_RESULT_CODE   ResultCode;
+        uint32_t                    Reserved;
+    };
+} HV_ACCESS_GPA_RESULT;
+
+
+/** Input for HvCallReadGpa. */
+typedef struct
+{
+    HV_PARTITION_ID             PartitionId;
+    HV_VP_INDEX                 VpIndex;
+    uint32_t                    ByteCount;
+    HV_GPA                      BaseGpa;
+    HV_ACCESS_GPA_CONTROL_FLAGS ControlFlags;
+} HV_INPUT_READ_GPA;
+AssertCompileSize(HV_INPUT_READ_GPA, 32);
+/** Pointer to the input for HvCallReadGpa. */
+typedef HV_INPUT_READ_GPA *PHV_INPUT_READ_GPA;
+
+/** Output for HvCallReadGpa. */
+typedef struct
+{
+    HV_ACCESS_GPA_RESULT        AccessResult;
+    uint8_t                     Data[16];
+} HV_OUTPUT_READ_GPA;
+AssertCompileSize(HV_OUTPUT_READ_GPA, 24);
+/** Pointer to the output for HvCallReadGpa. */
+typedef HV_OUTPUT_READ_GPA *PHV_OUTPUT_READ_GPA;
+
+
+/** Input for HvCallWriteGpa. */
+typedef struct
+{
+    HV_PARTITION_ID             PartitionId;
+    HV_VP_INDEX                 VpIndex;
+    uint32_t                    ByteCount;
+    HV_GPA                      BaseGpa;
+    HV_ACCESS_GPA_CONTROL_FLAGS ControlFlags;
+    uint8_t                     Data[16];
+} HV_INPUT_WRITE_GPA;
+AssertCompileSize(HV_INPUT_READ_GPA, 32);
+/** Pointer to the input for HvCallWriteGpa. */
+typedef HV_INPUT_READ_GPA *PHV_INPUT_READ_GPA;
+
+/** Output for HvCallWriteGpa. */
+typedef struct
+{
+    HV_ACCESS_GPA_RESULT        AccessResult;
+} HV_OUTPUT_WRITE_GPA;
+AssertCompileSize(HV_OUTPUT_WRITE_GPA, 8);
+/** Pointer to the output for HvCallWriteGpa. */
+typedef HV_OUTPUT_WRITE_GPA *PHV_OUTPUT_WRITE_GPA;
+
+
+/**
+ * Register names used by HvCallGetVpRegisters and HvCallSetVpRegisters.
+ */
+typedef enum _HV_REGISTER_NAME
+{
+    HvRegisterExplicitSuspend = 0x00000000,
+    HvRegisterInterceptSuspend,
+    HvRegisterUnknown02,                                /**< Reads as 0 initially on exo part. */
+    HvRegisterUnknown03,                                /**< Reads as 0 initially on exo part. */
+    HvRegisterInternalActivityState,                    /**< @since about build 17758 */
+
+    HvRegisterHypervisorVersion = 0x00000100,           /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterPrivilegesAndFeaturesInfo = 0x00000200,   /**< @since v5 @note Not readable on exo part. */
+    HvRegisterFeaturesInfo,                             /**< @since v5 @note Not readable on exo part. */
+    HvRegisterImplementationLimitsInfo,                 /**< @since v5 @note Not readable on exo part. */
+    HvRegisterHardwareFeaturesInfo,                     /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterGuestCrashP0 = 0x00000210,                /**< @since v5 @note Not readable on exo part. */
+    HvRegisterGuestCrashP1,                             /**< @since v5 @note Not readable on exo part. */
+    HvRegisterGuestCrashP2,                             /**< @since v5 @note Not readable on exo part. */
+    HvRegisterGuestCrashP3,                             /**< @since v5 @note Not readable on exo part. */
+    HvRegisterGuestCrashP4,                             /**< @since v5 @note Not readable on exo part. */
+    HvRegisterGuestCrashCtl,                            /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterPowerStateConfigC1 = 0x00000220,          /**< @since v5 @note Not readable on exo part. */
+    HvRegisterPowerStateTriggerC1,                      /**< @since v5 @note Not readable on exo part. */
+    HvRegisterPowerStateConfigC2,                       /**< @since v5 @note Not readable on exo part. */
+    HvRegisterPowerStateTriggerC2,                      /**< @since v5 @note Not readable on exo part. */
+    HvRegisterPowerStateConfigC3,                       /**< @since v5 @note Not readable on exo part. */
+    HvRegisterPowerStateTriggerC3,                      /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterSystemReset = 0x00000230,                 /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterProcessorClockFrequency = 0x00000240,     /**< @since v5 @note Not readable on exo part. */
+    HvRegisterInterruptClockFrequency,                  /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterGuestIdle = 0x00000250,                   /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterDebugDeviceOptions = 0x00000260,          /**< @since v5 @note Not readable on exo part. */
+
+    HvRegisterPendingInterruption = 0x00010002,
+    HvRegisterInterruptState,
+    HvRegisterPendingEvent0,                            /**< @since v5 */
+    HvRegisterPendingEvent1,                            /**< @since v5 */
+    HvX64RegisterDeliverabilityNotifications,           /**< @since v5c? Late 2017? */
+
+    HvX64RegisterRax = 0x00020000,
+    HvX64RegisterRcx,
+    HvX64RegisterRdx,
+    HvX64RegisterRbx,
+    HvX64RegisterRsp,
+    HvX64RegisterRbp,
+    HvX64RegisterRsi,
+    HvX64RegisterRdi,
+    HvX64RegisterR8,
+    HvX64RegisterR9,
+    HvX64RegisterR10,
+    HvX64RegisterR11,
+    HvX64RegisterR12,
+    HvX64RegisterR13,
+    HvX64RegisterR14,
+    HvX64RegisterR15,
+    HvX64RegisterRip,
+    HvX64RegisterRflags,
+
+    HvX64RegisterXmm0 = 0x00030000,
+    HvX64RegisterXmm1,
+    HvX64RegisterXmm2,
+    HvX64RegisterXmm3,
+    HvX64RegisterXmm4,
+    HvX64RegisterXmm5,
+    HvX64RegisterXmm6,
+    HvX64RegisterXmm7,
+    HvX64RegisterXmm8,
+    HvX64RegisterXmm9,
+    HvX64RegisterXmm10,
+    HvX64RegisterXmm11,
+    HvX64RegisterXmm12,
+    HvX64RegisterXmm13,
+    HvX64RegisterXmm14,
+    HvX64RegisterXmm15,
+    HvX64RegisterFpMmx0,
+    HvX64RegisterFpMmx1,
+    HvX64RegisterFpMmx2,
+    HvX64RegisterFpMmx3,
+    HvX64RegisterFpMmx4,
+    HvX64RegisterFpMmx5,
+    HvX64RegisterFpMmx6,
+    HvX64RegisterFpMmx7,
+    HvX64RegisterFpControlStatus,
+    HvX64RegisterXmmControlStatus,
+
+    HvX64RegisterCr0 = 0x00040000,
+    HvX64RegisterCr2,
+    HvX64RegisterCr3,
+    HvX64RegisterCr4,
+    HvX64RegisterCr8,
+    HvX64RegisterXfem,
+
+    HvX64RegisterIntermediateCr0 = 0x00041000,          /**< @since v5 */
+    HvX64RegisterIntermediateCr4 = 0x00041003,          /**< @since v5 */
+    HvX64RegisterIntermediateCr8,                       /**< @since v5 */
+
+    HvX64RegisterDr0 = 0x00050000,
+    HvX64RegisterDr1,
+    HvX64RegisterDr2,
+    HvX64RegisterDr3,
+    HvX64RegisterDr6,
+    HvX64RegisterDr7,
+
+    HvX64RegisterEs = 0x00060000,
+    HvX64RegisterCs,
+    HvX64RegisterSs,
+    HvX64RegisterDs,
+    HvX64RegisterFs,
+    HvX64RegisterGs,
+    HvX64RegisterLdtr,
+    HvX64RegisterTr,
+
+    HvX64RegisterIdtr = 0x00070000,
+    HvX64RegisterGdtr,
+
+    HvX64RegisterTsc = 0x00080000,
+    HvX64RegisterEfer,
+    HvX64RegisterKernelGsBase,
+    HvX64RegisterApicBase,
+    HvX64RegisterPat,
+    HvX64RegisterSysenterCs,
+    HvX64RegisterSysenterEip,
+    HvX64RegisterSysenterEsp,
+    HvX64RegisterStar,
+    HvX64RegisterLstar,
+    HvX64RegisterCstar,
+    HvX64RegisterSfmask,
+    HvX64RegisterInitialApicId,
+
+    HvX64RegisterMtrrCap,                           /**< Not readable in exo partitions? */
+    HvX64RegisterMtrrDefType,
+
+    HvX64RegisterMtrrPhysBase0 = 0x00080010,
+    HvX64RegisterMtrrPhysBase1,
+    HvX64RegisterMtrrPhysBase2,
+    HvX64RegisterMtrrPhysBase3,
+    HvX64RegisterMtrrPhysBase4,
+    HvX64RegisterMtrrPhysBase5,
+    HvX64RegisterMtrrPhysBase6,
+    HvX64RegisterMtrrPhysBase7,
+    HvX64RegisterMtrrPhysBase8,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBase9,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseA,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseB,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseC,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseD,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseE,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysBaseF,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+
+    HvX64RegisterMtrrPhysMask0 = 0x00080040,
+    HvX64RegisterMtrrPhysMask1,
+    HvX64RegisterMtrrPhysMask2,
+    HvX64RegisterMtrrPhysMask3,
+    HvX64RegisterMtrrPhysMask4,
+    HvX64RegisterMtrrPhysMask5,
+    HvX64RegisterMtrrPhysMask6,
+    HvX64RegisterMtrrPhysMask7,
+    HvX64RegisterMtrrPhysMask8,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMask9,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskA,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskB,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskC,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskD,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskE,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterMtrrPhysMaskF,                     /**< @since v4 @note Appears not to be readable on exo partition (Threadripper). */
+
+    HvX64RegisterMtrrFix64k00000 = 0x00080070,
+    HvX64RegisterMtrrFix16k80000,
+    HvX64RegisterMtrrFix16kA0000,
+    HvX64RegisterMtrrFix4kC0000,
+    HvX64RegisterMtrrFix4kC8000,
+    HvX64RegisterMtrrFix4kD0000,
+    HvX64RegisterMtrrFix4kD8000,
+    HvX64RegisterMtrrFix4kE0000,
+    HvX64RegisterMtrrFix4kE8000,
+    HvX64RegisterMtrrFix4kF0000,
+    HvX64RegisterMtrrFix4kF8000,
+    HvX64RegisterTscAux,                            /**< @since v5c? late 2017? */
+
+    HvX64RegisterUnknown8007d = 0x0008007d,         /**< Readable on exo partition (17134), initial value is zero. */
+
+    HvX64RegisterSpecCtrl = 0x00080084,             /**< @since build about 17758 */
+    HvX64RegisterPredCmd,                           /**< @since build about 17758 */
+
+    HvX64RegisterIa32MiscEnable = 0x000800a0,       /**< @since v5 @note Appears not to be readable on exo partition (Threadripper). */
+    HvX64RegisterIa32FeatureControl,                /**< @since v5 @note Appears not to be readable on exo partition (Threadripper). */
+
+    HvX64RegisterApicId = 0x00084802,               /**< @since build 17758 */
+    HvX64RegisterApicVersion,                       /**< @since build 17758 */
+
+    /** Uptime counter or some such thing.  Unit is different than HvRegisterTimeRefCount or the accounting is different. */
+    HvX64RegisterVpRuntime = 0x00090000,
+    HvX64RegisterHypercall,
+    HvRegisterGuestOsId,
+    HvRegisterVpIndex,
+    HvRegisterTimeRefCount,                         /**< Time counter since partition creation, 100ns units. */
+
+    HvRegisterCpuManagementVersion = 0x00090007,    /**< @since v5 @note Appears not to be readable on exo partition. */
+
+    HvX64RegisterEoi = 0x00090010,                  /**< @note Appears not to be readable on exo partition. */
+    HvX64RegisterIcr,                               /**< @note Appears not to be readable on exo partition. */
+    HvX64RegisterTpr,                               /**< @note Appears not to be readable on exo partition. */
+    HvRegisterVpAssistPage,
+    /** Readable on exo partition (17134). Some kind of counter. */
+    HvRegisterUnknown90014,
+
+    HvRegisterStatsPartitionRetail = 0x00090020,
+    HvRegisterStatsPartitionInternal,
+    HvRegisterStatsVpRetail,
+    HvRegisterStatsVpInternal,
+
+    HvRegisterSint0 = 0x000a0000,
+    HvRegisterSint1,
+    HvRegisterSint2,
+    HvRegisterSint3,
+    HvRegisterSint4,
+    HvRegisterSint5,
+    HvRegisterSint6,
+    HvRegisterSint7,
+    HvRegisterSint8,
+    HvRegisterSint9,
+    HvRegisterSint10,
+    HvRegisterSint11,
+    HvRegisterSint12,
+    HvRegisterSint13,
+    HvRegisterSint14,
+    HvRegisterSint15,
+    HvRegisterScontrol,
+    HvRegisterSversion,
+    HvRegisterSifp,
+    HvRegisterSipp,
+    HvRegisterEom,
+    HvRegisterSirbp,                                /**< @since v4 */
+
+    HvRegisterStimer0Config = 0x000b0000,
+    HvRegisterStimer0Count,
+    HvRegisterStimer1Config,
+    HvRegisterStimer1Count,
+    HvRegisterStimer2Config,
+    HvRegisterStimer2Count,
+    HvRegisterStimer3Config,
+    HvRegisterStimer3Count,
+
+    HvRegisterUnknown0b0100 = 0x000b0100,           /**< Readable on exo partition (17134), initial value is zero. */
+    HvRegisterUnknown0b0101,                        /**< Readable on exo partition (17134), initial value is zero. */
+
+    HvX64RegisterYmm0Low = 0x000c0000,              /**< @note Not readable on exo partition.  Need something enabled? */
+    HvX64RegisterYmm1Low,
+    HvX64RegisterYmm2Low,
+    HvX64RegisterYmm3Low,
+    HvX64RegisterYmm4Low,
+    HvX64RegisterYmm5Low,
+    HvX64RegisterYmm6Low,
+    HvX64RegisterYmm7Low,
+    HvX64RegisterYmm8Low,
+    HvX64RegisterYmm9Low,
+    HvX64RegisterYmm10Low,
+    HvX64RegisterYmm11Low,
+    HvX64RegisterYmm12Low,
+    HvX64RegisterYmm13Low,
+    HvX64RegisterYmm14Low,
+    HvX64RegisterYmm15Low,
+    HvX64RegisterYmm0High,
+    HvX64RegisterYmm1High,
+    HvX64RegisterYmm2High,
+    HvX64RegisterYmm3High,
+    HvX64RegisterYmm4High,
+    HvX64RegisterYmm5High,
+    HvX64RegisterYmm6High,
+    HvX64RegisterYmm7High,
+    HvX64RegisterYmm8High,
+    HvX64RegisterYmm9High,
+    HvX64RegisterYmm10High,
+    HvX64RegisterYmm11High,
+    HvX64RegisterYmm12High,
+    HvX64RegisterYmm13High,
+    HvX64RegisterYmm14High,
+    HvX64RegisterYmm15High,
+
+    HvRegisterVsmVpVtlControl = 0x000d0000,         /**< @note Not readable on exo partition. */
+
+    HvRegisterVsmCodePageOffsets = 0x000d0002,
+    HvRegisterVsmVpStatus,
+    HvRegisterVsmPartitionStatus,
+    HvRegisterVsmVina,                              /**< @note Not readable on exo partition. */
+    HvRegisterVsmCapabilities,
+    HvRegisterVsmPartitionConfig,                   /**< @note Not readable on exo partition. */
+
+    HvRegisterVsmVpSecureConfigVtl0 = 0x000d0010,   /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl1,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl2,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl3,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl4,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl5,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl6,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl7,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl8,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl9,                /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl10,               /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl11,               /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl12,               /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl13,               /**< @since v5 */
+    HvRegisterVsmVpSecureConfigVtl14,               /**< @since v5 */
+
+    HvRegisterUnknown0e0000 = 0x000e0000,           /**< Readable on exo partition (17134), initial value zero. */
+    HvRegisterUnknown0e0001,                        /**< Readable on exo partition (17134), initial value zero. */
+    HvRegisterUnknown0e0002,                        /**< Readable on exo partition (17134), initial value zero. */
+    HvRegisterUnknown0e0003                         /**< Readable on exo partition (17134), initial value zero. */
+} HV_REGISTER_NAME;
+AssertCompile(HvRegisterInterceptSuspend == 0x00000001);
+AssertCompile(HvRegisterPendingEvent1 == 0x00010005);
+AssertCompile(HvX64RegisterDeliverabilityNotifications == 0x00010006);
+AssertCompile(HvX64RegisterRflags == 0x00020011);
+AssertCompile(HvX64RegisterXmmControlStatus == 0x00030019);
+AssertCompile(HvX64RegisterXfem == 0x00040005);
+AssertCompile(HvX64RegisterIntermediateCr0 == 0x00041000);
+AssertCompile(HvX64RegisterIntermediateCr4 == 0x00041003);
+AssertCompile(HvX64RegisterDr7 == 0x00050005);
+AssertCompile(HvX64RegisterTr == 0x00060007);
+AssertCompile(HvX64RegisterGdtr == 0x00070001);
+AssertCompile(HvX64RegisterInitialApicId == 0x0008000c);
+AssertCompile(HvX64RegisterMtrrCap == 0x0008000d);
+AssertCompile(HvX64RegisterMtrrDefType == 0x0008000e);
+AssertCompile(HvX64RegisterMtrrPhysBaseF == 0x0008001f);
+AssertCompile(HvX64RegisterMtrrPhysMaskF == 0x0008004f);
+AssertCompile(HvX64RegisterMtrrFix4kF8000 == 0x0008007a);
+AssertCompile(HvRegisterTimeRefCount == 0x00090004);
+AssertCompile(HvRegisterCpuManagementVersion == 0x00090007);
+AssertCompile(HvRegisterVpAssistPage == 0x00090013);
+AssertCompile(HvRegisterStatsVpInternal == 0x00090023);
+AssertCompile(HvRegisterSirbp == 0x000a0015);
+AssertCompile(HvRegisterStimer3Count == 0x000b0007);
+AssertCompile(HvX64RegisterYmm15High == 0x000c001f);
+AssertCompile(HvRegisterVsmVpSecureConfigVtl14 == 0x000d001e);
+AssertCompileSize(HV_REGISTER_NAME, 4);
+
+
+/** Value format for HvRegisterExplicitSuspend. */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint64_t        Suspended : 1;
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved  : 63;
+#endif
+    };
+} HV_EXPLICIT_SUSPEND_REGISTER;
+/** Pointer to a value of HvRegisterExplicitSuspend. */
+typedef HV_EXPLICIT_SUSPEND_REGISTER *PHV_EXPLICIT_SUSPEND_REGISTER;
+
+/** Value format for HvRegisterInterceptSuspend. */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint64_t        Suspended : 1;
+        uint64_t        TlbLocked : 1;
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved  : 62;
+#endif
+    };
+} HV_INTERCEPT_SUSPEND_REGISTER;
+/** Pointer to a value of HvRegisterInterceptSuspend. */
+typedef HV_INTERCEPT_SUSPEND_REGISTER *PHV_INTERCEPT_SUSPEND_REGISTER;
+
+/** Value format for HvRegisterInterruptState.
+ * @sa WHV_X64_INTERRUPT_STATE_REGISTER */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint64_t        InterruptShadow : 1;
+        uint64_t        NmiMasked       : 1;
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved        : 62;
+#endif
+    };
+} HV_X64_INTERRUPT_STATE_REGISTER;
+/** Pointer to a value of HvRegisterInterruptState. */
+typedef HV_X64_INTERRUPT_STATE_REGISTER *PHV_X64_INTERRUPT_STATE_REGISTER;
+
+/** Pending exception type for HvRegisterPendingInterruption.
+ * @sa WHV_X64_PENDING_INTERRUPTION_TYPE */
+typedef enum
+{
+    HvX64PendingInterrupt = 0,
+    /* what is/was 1? */
+    HvX64PendingNmi = 2,
+    HvX64PendingException
+    /* any more? */
+} HV_X64_PENDING_INTERRUPTION_TYPE;
+
+/** Value format for HvRegisterPendingInterruption.
+ * @sa WHV_X64_PENDING_INTERRUPTION_REGISTER  */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint32_t        InterruptionPending : 1;
+        uint32_t        InterruptionType    : 3;    /**< HV_X64_PENDING_INTERRUPTION_TYPE */
+        uint32_t        DeliverErrorCode    : 1;
+        uint32_t        InstructionLength   : 4;    /**< @since v5? Wasn't in 7600 WDK */
+        uint32_t        NestedEvent         : 1;    /**< @since v5? Wasn't in 7600 WDK */
+        uint32_t        Reserved            : 6;
+        uint32_t        InterruptionVector  : 16;
+        uint32_t        ErrorCode;
+    };
+} HV_X64_PENDING_INTERRUPTION_REGISTER;
+/** Pointer to a value of HvRegisterPendingInterruption. */
+typedef HV_X64_PENDING_INTERRUPTION_REGISTER *PHV_X64_PENDING_INTERRUPTION_REGISTER;
+
+/** Value format for HvX64RegisterDeliverabilityNotifications.
+ *  Value format for HvRegisterPendingEvent0/1.
+ * @sa WHV_X64_DELIVERABILITY_NOTIFICATIONS_REGISTER  */
+typedef union
+{
+    uint64_t            AsUINT64;
+    struct
+    {
+        uint64_t        NmiNotification         : 1;
+        uint64_t        InterruptNotification   : 1;
+        uint64_t        InterruptPriority       : 4;
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved                : 58;
+#endif
+    };
+} HV_X64_DELIVERABILITY_NOTIFICATIONS_REGISTER;
+/** Pointer to a value of HvRegisterPendingEvent0/1. */
+typedef HV_X64_DELIVERABILITY_NOTIFICATIONS_REGISTER *PHV_X64_DELIVERABILITY_NOTIFICATIONS_REGISTER;
+
+
+/** Value format for HvX64RegisterEs..Tr.
+ * @sa WHV_X64_SEGMENT_REGISTER  */
+typedef struct _HV_X64_SEGMENT_REGISTER
+{
+    uint64_t            Base;
+    uint32_t            Limit;
+    uint16_t            Selector;
+    union
+    {
+        struct
+        {
+            uint16_t    SegmentType              : 4;
+            uint16_t    NonSystemSegment         : 1;
+            uint16_t    DescriptorPrivilegeLevel : 2;
+            uint16_t    Present                  : 1;
+            uint16_t    Reserved                 : 4;
+            uint16_t    Available                : 1;
+            uint16_t    Long                     : 1;
+            uint16_t    Default                  : 1;
+            uint16_t    Granularity              : 1;
+        };
+        uint16_t        Attributes;
+    };
+} HV_X64_SEGMENT_REGISTER;
+AssertCompileSize(HV_X64_SEGMENT_REGISTER, 16);
+/** Pointer to a value of HvX64RegisterEs..Tr. */
+typedef HV_X64_SEGMENT_REGISTER *PHV_X64_SEGMENT_REGISTER;
+
+/** Value format for HvX64RegisterIdtr/Gdtr.
+ * @sa WHV_X64_TABLE_REGISTER */
+typedef struct
+{
+    uint16_t            Pad[3];
+    uint16_t            Limit;
+    uint64_t            Base;
+} HV_X64_TABLE_REGISTER;
+AssertCompileSize(HV_X64_TABLE_REGISTER, 16);
+/** Pointer to a value of HvX64RegisterIdtr/Gdtrr. */
+typedef HV_X64_TABLE_REGISTER *PHV_X64_TABLE_REGISTER;
+
+/** Value format for HvX64RegisterFpMmx0..7 in floating pointer mode.
+ * @sa WHV_X64_FP_REGISTER, RTFLOAT80U2 */
+typedef union
+{
+    HV_UINT128          AsUINT128;
+    struct
+    {
+        uint64_t        Mantissa;
+        uint64_t        BiasedExponent  : 15;
+        uint64_t        Sign            : 1;
+#ifndef IN_IDA_PRO
+        uint64_t        Reserved        : 48;
+#endif
+    };
+} HV_X64_FP_REGISTER;
+/** Pointer to a value of HvX64RegisterFpMmx0..7 in floating point mode. */
+typedef HV_X64_FP_REGISTER *PHV_X64_FP_REGISTER;
+
+/** Value union for HvX64RegisterFpMmx0..7. */
+typedef union
+{
+    HV_UINT128          AsUINT128;
+    HV_X64_FP_REGISTER  Fp;
+    uint64_t            Mmx;
+} HV_X64_FP_MMX_REGISTER;
+/** Pointer to a value of HvX64RegisterFpMmx0..7. */
+typedef HV_X64_FP_MMX_REGISTER *PHV_X64_FP_MMX_REGISTER;
+
+/** Value format for HvX64RegisterFpControlStatus.
+ * @sa WHV_X64_FP_CONTROL_STATUS_REGISTER  */
+typedef union
+{
+    HV_UINT128              AsUINT128;
+    struct
+    {
+        uint16_t            FpControl;
+        uint16_t            FpStatus;
+        uint8_t             FpTag;
+        uint8_t             IgnNe    : 1;
+        uint8_t             Reserved : 7;
+        uint16_t            LastFpOp;
+        union
+        {
+            uint64_t        LastFpRip;
+            struct
+            {
+                uint32_t    LastFpEip;
+                uint16_t    LastFpCs;
+            };
+        };
+    };
+} HV_X64_FP_CONTROL_STATUS_REGISTER;
+/** Pointer to a value of HvX64RegisterFpControlStatus. */
+typedef HV_X64_FP_CONTROL_STATUS_REGISTER *PHV_X64_FP_CONTROL_STATUS_REGISTER;
+
+/** Value format for HvX64RegisterXmmControlStatus.
+ * @sa WHV_X64_XMM_CONTROL_STATUS_REGISTER  */
+typedef union
+{
+    HV_UINT128 AsUINT128;
+    struct
+    {
+        union
+        {
+            uint64_t        LastFpRdp;
+            struct
+            {
+                uint32_t    LastFpDp;
+                uint16_t    LastFpDs;
+            };
+        };
+        uint32_t            XmmStatusControl;
+        uint32_t            XmmStatusControlMask;
+    };
+} HV_X64_XMM_CONTROL_STATUS_REGISTER;
+/** Pointer to a value of HvX64RegisterXmmControlStatus. */
+typedef HV_X64_XMM_CONTROL_STATUS_REGISTER *PHV_X64_XMM_CONTROL_STATUS_REGISTER;
+
+/** Register value union.
+ * @sa WHV_REGISTER_VALUE  */
+typedef union
+{
+    HV_UINT128                                      Reg128;
+    uint64_t                                        Reg64;
+    uint32_t                                        Reg32;
+    uint16_t                                        Reg16;
+    uint8_t                                         Reg8;
+    HV_EXPLICIT_SUSPEND_REGISTER                    ExplicitSuspend;
+    HV_INTERCEPT_SUSPEND_REGISTER                   InterceptSuspend;
+    HV_X64_INTERRUPT_STATE_REGISTER                 InterruptState;
+    HV_X64_PENDING_INTERRUPTION_REGISTER            PendingInterruption;
+    HV_X64_DELIVERABILITY_NOTIFICATIONS_REGISTER    DeliverabilityNotifications;
+    HV_X64_TABLE_REGISTER                           Table;
+    HV_X64_SEGMENT_REGISTER                         Segment;
+    HV_X64_FP_REGISTER                              Fp;
+    HV_X64_FP_CONTROL_STATUS_REGISTER               FpControlStatus;
+    HV_X64_XMM_CONTROL_STATUS_REGISTER              XmmControlStatus;
+} HV_REGISTER_VALUE;
+AssertCompileSize(HV_REGISTER_VALUE, 16);
+/** Pointer to a Hyper-V register value union. */
+typedef HV_REGISTER_VALUE *PHV_REGISTER_VALUE;
+/** Pointer to a const Hyper-V register value union. */
+typedef HV_REGISTER_VALUE const *PCHV_REGISTER_VALUE;
+
+
+/** Input for HvCallGetVpRegisters. */
+typedef struct
+{
+    HV_PARTITION_ID     PartitionId;
+    HV_VP_INDEX         VpIndex;
+    /** Was this introduced after v2? Dunno what it it really is. */
+    uint32_t            fFlags;
+    /* The repeating part: */
+    RT_FLEXIBLE_ARRAY_EXTENSION
+    HV_REGISTER_NAME    Names[RT_FLEXIBLE_ARRAY];
+} HV_INPUT_GET_VP_REGISTERS;
+AssertCompileMemberOffset(HV_INPUT_GET_VP_REGISTERS, Names, 16);
+/** Pointer to input for HvCallGetVpRegisters. */
+typedef HV_INPUT_GET_VP_REGISTERS *PHV_INPUT_GET_VP_REGISTERS;
+/* Output for HvCallGetVpRegisters is an array of HV_REGISTER_VALUE parallel to HV_INPUT_GET_VP_REGISTERS::Names. */
+
+
+/** Register and value pair for HvCallSetVpRegisters. */
+typedef struct
+{
+    HV_REGISTER_NAME    Name;
+    uint32_t            Pad0;
+    uint64_t            Pad1;
+    HV_REGISTER_VALUE   Value;
+} HV_REGISTER_ASSOC;
+AssertCompileSize(HV_REGISTER_ASSOC, 32);
+AssertCompileMemberOffset(HV_REGISTER_ASSOC, Value, 16);
+/** Pointer to a register and value pair for HvCallSetVpRegisters. */
+typedef HV_REGISTER_ASSOC *PHV_REGISTER_ASSOC;
+/** Helper for clearing the alignment padding members. */
+#define HV_REGISTER_ASSOC_ZERO_PADDING(a_pRegAssoc) do { (a_pRegAssoc)->Pad0 = 0; (a_pRegAssoc)->Pad1 = 0; } while (0)
+/** Helper for clearing the alignment padding members and the high 64-bit
+ * part of the value. */
+#define HV_REGISTER_ASSOC_ZERO_PADDING_AND_HI64(a_pRegAssoc) \
+    do { (a_pRegAssoc)->Pad0 = 0; (a_pRegAssoc)->Pad1 = 0; (a_pRegAssoc)->Value.Reg128.High64 = 0; } while (0)
+
+/** Input for HvCallSetVpRegisters. */
+typedef struct
+{
+    HV_PARTITION_ID     PartitionId;
+    HV_VP_INDEX         VpIndex;
+    uint32_t            RsvdZ;
+    /* The repeating part: */
+    RT_FLEXIBLE_ARRAY_EXTENSION
+    HV_REGISTER_ASSOC   Elements[RT_FLEXIBLE_ARRAY];
+} HV_INPUT_SET_VP_REGISTERS;
+AssertCompileMemberOffset(HV_INPUT_SET_VP_REGISTERS, Elements, 16);
+/** Pointer to input for HvCallSetVpRegisters. */
+typedef HV_INPUT_SET_VP_REGISTERS *PHV_INPUT_SET_VP_REGISTERS;
+
+
+
+/**
+ * Hyper-V SyncIC message types.
+ */
+typedef enum
+{
+    HvMessageTypeNone = 0x00000000,
+
+    HvMessageTypeUnmappedGpa = 0x80000000,
+    HvMessageTypeGpaIntercept,
+
+    HvMessageTimerExpired = 0x80000010,
+
+    HvMessageTypeInvalidVpRegisterValue = 0x80000020,
+    HvMessageTypeUnrecoverableException,
+    HvMessageTypeUnsupportedFeature,
+    HvMessageTypeTlbPageSizeMismatch,                   /**< @since v5 */
+
+    /** @note Same as HvMessageTypeX64ApicEoi? Gone in 5.0.  Missing from 7600 WDK
+     *        headers even if it's in the 2.0 docs.  */
+    HvMessageTypeApicEoi = 0x80000030,
+    /** @note Same as HvMessageTypeX64LegacyFpError? Gone in 5.0, whereas 4.0b
+     *        calls it HvMessageTypeX64LegacyFpError.  Missing from 7600 WDK
+     *        headers even if it's in the 2.0 docs. */
+    HvMessageTypeFerrAsserted,
+
+    HvMessageTypeEventLogBufferComplete = 0x80000040,
+
+    HvMessageTypeX64IoPortIntercept = 0x80010000,
+    HvMessageTypeX64MsrIntercept,
+    HvMessageTypeX64CpuidIntercept,
+    HvMessageTypeX64ExceptionIntercept,
+    /** @note Appeared in 5.0 docs, but were here in 7600 WDK headers already. */
+    HvMessageTypeX64ApicEoi,
+    /** @note Appeared in 5.0 docs, but were here in 7600 WDK headers already. */
+    HvMessageTypeX64LegacyFpError,
+    /** @since v5   */
+    HvMessageTypeX64RegisterIntercept,
+    /** @since WinHvPlatform? */
+    HvMessageTypeX64Halt,
+    /** @since WinHvPlatform? */
+    HvMessageTypeX64InterruptWindow
+
+} HV_MESSAGE_TYPE;
+AssertCompileSize(HV_MESSAGE_TYPE, 4);
+AssertCompile(HvMessageTypeX64RegisterIntercept == 0x80010006);
+AssertCompile(HvMessageTypeX64Halt == 0x80010007);
+AssertCompile(HvMessageTypeX64InterruptWindow == 0x80010008);
+/** Pointer to a Hyper-V SyncIC message type. */
+typedef HV_MESSAGE_TYPE *PHV_MESSAGE_TYPE;
+
+/** Flag set for hypervisor messages, guest cannot send messages with this
+ *  flag set. */
+#define HV_MESSAGE_TYPE_HYPERVISOR_MASK     UINT32_C(0x80000000)
+
+/** Hyper-V SynIC message size (they are fixed sized). */
+#define HV_MESSAGE_SIZE                     256
+/** Maximum Hyper-V SynIC message payload size in bytes. */
+#define HV_MESSAGE_MAX_PAYLOAD_BYTE_COUNT   (HV_MESSAGE_SIZE - 16)
+/** Maximum Hyper-V SynIC message payload size in QWORDs (uint64_t). */
+#define HV_MESSAGE_MAX_PAYLOAD_QWORD_COUNT  (HV_MESSAGE_MAX_PAYLOAD_BYTE_COUNT / 8)
+
+/** SynIC message flags.   */
+typedef union
+{
+    uint8_t             AsUINT8;
+    struct
+    {
+        /** Messages are pending in the queue. */
+        uint8_t         MessagePending : 1;
+        uint8_t         Reserved : 7;
+    };
+} HV_MESSAGE_FLAGS;
+AssertCompileSize(HV_MESSAGE_FLAGS, 1);
+
+/** SynIC message header. */
+typedef struct
+{
+    HV_MESSAGE_TYPE     MessageType;
+    /** The 2.0-5.0b docs all have this incorrectly switched with 'Reserved', WDK 7600 got it right. */
+    uint8_t             PayloadSize;
+    HV_MESSAGE_FLAGS    MessageFlags;
+    uint16_t            Reserved;
+    union
+    {
+        uint64_t        OriginationId;
+        HV_PARTITION_ID Sender;
+        HV_PORT_ID      Port;
+    };
+} HV_MESSAGE_HEADER;
+AssertCompileSize(HV_MESSAGE_HEADER, 16);
+/** Pointer to a Hyper-V message header. */
+typedef HV_MESSAGE_HEADER *PHV_MESSAGE_HEADER;
+/** Pointer to a const Hyper-V message header. */
+typedef HV_MESSAGE_HEADER const *PCHV_MESSAGE_HEADER;
+
+
+
+/** @name Intercept access type.
+ * @{ */
+typedef uint8_t HV_INTERCEPT_ACCESS_TYPE;
+#define HV_INTERCEPT_ACCESS_READ            0
+#define HV_INTERCEPT_ACCESS_WRITE           1
+#define HV_INTERCEPT_ACCESS_EXECUTE         2
+/** @} */
+
+/** @name Intercept access type mask.
+ * @{ */
+typedef uint32_t HV_INTERCEPT_ACCESS_TYPE_MASK;
+#define HV_INTERCEPT_ACCESS_MASK_NONE       0
+#define HV_INTERCEPT_ACCESS_MASK_READ       1
+#define HV_INTERCEPT_ACCESS_MASK_WRITE      2
+#define HV_INTERCEPT_ACCESS_MASK_EXECUTE    4
+/** @} */
+
+/** X64 intercept execution state.
+ * @sa WHV_X64_VP_EXECUTION_STATE */
+typedef union
+{
+    uint16_t            AsUINT16;
+    struct
+    {
+        uint16_t        Cpl                 : 2;
+        uint16_t        Cr0Pe               : 1;
+        uint16_t        Cr0Am               : 1;
+        uint16_t        EferLma             : 1;
+        uint16_t        DebugActive         : 1;
+        uint16_t        InterruptionPending : 1;
+        uint16_t        Reserved0           : 5;
+        uint16_t        InterruptShadow     : 1;
+        uint16_t        Reserved1           : 3;
+    };
+} HV_X64_VP_EXECUTION_STATE;
+AssertCompileSize(HV_X64_VP_EXECUTION_STATE, 2);
+/** Pointer to X86 intercept execution state. */
+typedef HV_X64_VP_EXECUTION_STATE *PHV_X64_VP_EXECUTION_STATE;
+/** Pointer to const X86 intercept execution state. */
+typedef HV_X64_VP_EXECUTION_STATE const *PCHV_X64_VP_EXECUTION_STATE;
+
+/** X64 intercept message header. */
+typedef struct
+{
+    HV_VP_INDEX                     VpIndex;                /**< 0x00 */
+    uint8_t                         InstructionLength : 4;  /**< 0x04[3:0]: Zero if not available, instruction fetch exit, ... */
+    uint8_t                         Cr8 : 4;                /**< 0x04[7:4]: Not sure since when, but after v2. */
+    HV_INTERCEPT_ACCESS_TYPE        InterceptAccessType;    /**< 0x05 */
+    HV_X64_VP_EXECUTION_STATE       ExecutionState;         /**< 0x06 */
+    HV_X64_SEGMENT_REGISTER         CsSegment;              /**< 0x08 */
+    uint64_t                        Rip;                    /**< 0x18 */
+    uint64_t                        Rflags;                 /**< 0x20 */
+} HV_X64_INTERCEPT_MESSAGE_HEADER;
+AssertCompileSize(HV_X64_INTERCEPT_MESSAGE_HEADER, 40);
+/** Pointer to a x86 intercept message header. */
+typedef HV_X64_INTERCEPT_MESSAGE_HEADER *PHV_X64_INTERCEPT_MESSAGE_HEADER;
+
+
+/** X64 memory access flags (HvMessageTypeGpaIntercept, HvMessageTypeUnmappedGpa).
+ * @sa WHV_MEMORY_ACCESS_INFO */
+typedef union
+{
+    uint8_t             AsUINT8;
+    struct
+    {
+        uint8_t         GvaValid : 1;
+        uint8_t         Reserved : 7;
+    };
+} HV_X64_MEMORY_ACCESS_INFO;
+AssertCompileSize(HV_X64_MEMORY_ACCESS_INFO, 1);
+
+/** The payload format for HvMessageTypeGpaIntercept and HvMessageTypeUnmappedGpa.
+ * @sa   WHV_MEMORY_ACCESS_CONTEXT
+ * @note max message size. */
+typedef struct
+{
+    HV_X64_INTERCEPT_MESSAGE_HEADER Header;                 /**< 0x00 */
+    HV_CACHE_TYPE                   CacheType;              /**< 0x28 */
+    uint8_t                         InstructionByteCount;   /**< 0x2c */
+    HV_X64_MEMORY_ACCESS_INFO       MemoryAccessInfo;       /**< 0x2d */
+    uint16_t                        Reserved1;              /**< 0x2e */
+    uint64_t                        GuestVirtualAddress;    /**< 0x30 */
+    uint64_t                        GuestPhysicalAddress;   /**< 0x38 */
+    uint8_t                         InstructionBytes[16];   /**< 0x40 */
+    /* We don't the following (v5 / WinHvPlatform): */
+    HV_X64_SEGMENT_REGISTER         DsSegment;              /**< 0x50 */
+    HV_X64_SEGMENT_REGISTER         SsSegment;              /**< 0x60 */
+    uint64_t                        Rax;                    /**< 0x70 */
+    uint64_t                        Rcx;                    /**< 0x78 */
+    uint64_t                        Rdx;                    /**< 0x80 */
+    uint64_t                        Rbx;                    /**< 0x88 */
+    uint64_t                        Rsp;                    /**< 0x90 */
+    uint64_t                        Rbp;                    /**< 0x98 */
+    uint64_t                        Rsi;                    /**< 0xa0 */
+    uint64_t                        Rdi;                    /**< 0xa8 */
+    uint64_t                        R8;                     /**< 0xb0 */
+    uint64_t                        R9;                     /**< 0xb8 */
+    uint64_t                        R10;                    /**< 0xc0 */
+    uint64_t                        R11;                    /**< 0xc8 */
+    uint64_t                        R12;                    /**< 0xd0 */
+    uint64_t                        R13;                    /**< 0xd8 */
+    uint64_t                        R14;                    /**< 0xe0 */
+    uint64_t                        R15;                    /**< 0xe8 */
+} HV_X64_MEMORY_INTERCEPT_MESSAGE;
+AssertCompileSize(HV_X64_MEMORY_INTERCEPT_MESSAGE, 0xf0);
+AssertCompileMemberOffset(HV_X64_MEMORY_INTERCEPT_MESSAGE, DsSegment, 0x50);
+/** Pointer to a HvMessageTypeGpaIntercept or HvMessageTypeUnmappedGpa payload. */
+typedef HV_X64_MEMORY_INTERCEPT_MESSAGE *PHV_X64_MEMORY_INTERCEPT_MESSAGE;
+/** Pointer to a const HvMessageTypeGpaIntercept or HvMessageTypeUnmappedGpa payload. */
+typedef HV_X64_MEMORY_INTERCEPT_MESSAGE const *PCHV_X64_MEMORY_INTERCEPT_MESSAGE;
+
+
+/** The payload format for HvMessageTypeX64MsrIntercept. */
+typedef struct _HV_X64_MSR_INTERCEPT_MESSAGE
+{
+    HV_X64_INTERCEPT_MESSAGE_HEADER     Header;                 /**< 0x00 */
+    uint32_t                            MsrNumber;              /**< 0x28 (ecx) */
+    uint32_t                            Reserved;               /**< 0x2c */
+    uint64_t                            Rdx;                    /**< 0x30 */
+    uint64_t                            Rax;                    /**< 0x38 */
+} HV_X64_MSR_INTERCEPT_MESSAGE;
+AssertCompileSize(HV_X64_MSR_INTERCEPT_MESSAGE, 0x40);
+/** Pointer to a HvMessageTypeX64MsrIntercept payload. */
+typedef HV_X64_MSR_INTERCEPT_MESSAGE *PHV_X64_MSR_INTERCEPT_MESSAGE;
+/** Pointer to a const HvMessageTypeX64MsrIntercept payload. */
+typedef HV_X64_MSR_INTERCEPT_MESSAGE const *PCHV_X64_MSR_INTERCEPT_MESSAGE;
+
+/** Full MSR message. */
+typedef struct
+{
+    HV_MESSAGE_HEADER                   MsgHdr;
+    HV_X64_MSR_INTERCEPT_MESSAGE        Payload;
+} HV_X64_MSR_INTERCEPT_MESSAGE_FULL;
+
+
+/** X64 I/O port access information (HvMessageTypeX64IoPortIntercept). */
+typedef union HV_X64_IO_PORT_ACCESS_INFO
+{
+    uint8_t             AsUINT8;
+    struct
+    {
+        uint8_t         AccessSize  : 3;
+        uint8_t         StringOp    : 1;
+        uint8_t         RepPrefix   : 1;
+        uint8_t         Reserved    : 3;
+    };
+} HV_X64_IO_PORT_ACCESS_INFO;
+AssertCompileSize(HV_X64_IO_PORT_ACCESS_INFO, 1);
+
+/** The payload format for HvMessageTypeX64IoPortIntercept.  */
+typedef struct _HV_X64_IO_PORT_INTERCEPT_MESSAGE
+{
+    HV_X64_INTERCEPT_MESSAGE_HEADER     Header;                 /**< 0x00 */
+    uint16_t                            PortNumber;             /**< 0x28 */
+    HV_X64_IO_PORT_ACCESS_INFO          AccessInfo;             /**< 0x2a */
+    uint8_t                             InstructionByteCount;   /**< 0x2b */
+    uint32_t                            Reserved;               /**< 0x2c */
+    uint64_t                            Rax;                    /**< 0x30 */
+    uint8_t                             InstructionBytes[16];   /**< 0x38 */
+    HV_X64_SEGMENT_REGISTER             DsSegment;              /**< 0x48 */
+    HV_X64_SEGMENT_REGISTER             EsSegment;              /**< 0x58 */
+    uint64_t                            Rcx;                    /**< 0x68 */
+    uint64_t                            Rsi;                    /**< 0x70 */
+    uint64_t                            Rdi;                    /**< 0x78 */
+} HV_X64_IO_PORT_INTERCEPT_MESSAGE;
+AssertCompileSize(HV_X64_IO_PORT_INTERCEPT_MESSAGE, 128);
+/** Pointer to a HvMessageTypeX64IoPortIntercept payload. */
+typedef HV_X64_IO_PORT_INTERCEPT_MESSAGE *PHV_X64_IO_PORT_INTERCEPT_MESSAGE;
+/** Pointer to a const HvMessageTypeX64IoPortIntercept payload. */
+typedef HV_X64_IO_PORT_INTERCEPT_MESSAGE const *PCHV_X64_IO_PORT_INTERCEPT_MESSAGE;
+
+/** Full I/O port message. */
+typedef struct
+{
+    HV_MESSAGE_HEADER                   MsgHdr;
+    HV_X64_IO_PORT_INTERCEPT_MESSAGE    Payload;
+} HV_X64_IO_PORT_INTERCEPT_MESSAGE_FULL;
+
+
+/**
+ * The payload format for HvMessageTypeX64CpuidIntercept,
+ *
+ * @note This message does not include HV_X64_INTERCEPT_MESSAGE_HEADER!
+ */
+typedef struct
+{
+    HV_X64_INTERCEPT_MESSAGE_HEADER     Header;                 /**< 0x00: The usual intercept header. */
+    uint64_t                            Rax;                    /**< 0x28: Input RAX. */
+    uint64_t                            Rcx;                    /**< 0x30: Input RCX. */
+    uint64_t                            Rdx;                    /**< 0x38: Input RDX. */
+    uint64_t                            Rbx;                    /**< 0x40: Input RBX. */
+    uint64_t                            DefaultResultRax;       /**< 0x48: Default result RAX. */
+    uint64_t                            DefaultResultRcx;       /**< 0x50: Default result RCX. */
+    uint64_t                            DefaultResultRdx;       /**< 0x58: Default result RDX. */
+    uint64_t                            DefaultResultRbx;       /**< 0x60: Default result RBX. */
+} HV_X64_CPUID_INTERCEPT_MESSAGE;
+AssertCompileSize(HV_X64_CPUID_INTERCEPT_MESSAGE, 0x68);
+/** Pointer to a HvMessageTypeX64CpuidIntercept payload. */
+typedef HV_X64_CPUID_INTERCEPT_MESSAGE *PHV_X64_CPUID_INTERCEPT_MESSAGE;
+/** Pointer to a const HvMessageTypeX64CpuidIntercept payload. */
+typedef HV_X64_CPUID_INTERCEPT_MESSAGE const *PCHV_X64_CPUID_INTERCEPT_MESSAGE;
+
+/** Full HvMessageTypeX64CpuidIntercept message. */
+typedef struct
+{
+    HV_MESSAGE_HEADER                   MsgHdr;
+    HV_X64_CPUID_INTERCEPT_MESSAGE      Payload;
+} HV_X64_CPUID_INTERCEPT_MESSAGE_FULL;
+
+
+/** X64 exception information (HvMessageTypeX64ExceptionIntercept).
+ * @sa WHV_VP_EXCEPTION_INFO */
+typedef union
+{
+    uint8_t             AsUINT8;
+    struct
+    {
+        uint8_t         ErrorCodeValid : 1;
+        /** @todo WHV_VP_EXCEPTION_INFO::SoftwareException   */
+        uint8_t         Reserved       : 7;
+    };
+} HV_X64_EXCEPTION_INFO;
+AssertCompileSize(HV_X64_EXCEPTION_INFO, 1);
+
+/** The payload format for HvMessageTypeX64ExceptionIntercept.
+ * @sa   WHV_VP_EXCEPTION_CONTEXT
+ * @note max message size. */
+typedef struct
+{
+    HV_X64_INTERCEPT_MESSAGE_HEADER     Header;                 /**< 0x00 */
+    uint16_t                            ExceptionVector;        /**< 0x28 */
+    HV_X64_EXCEPTION_INFO               ExceptionInfo;          /**< 0x2a */
+    uint8_t                             InstructionByteCount;   /**< 0x2b */
+    uint32_t                            ErrorCode;              /**< 0x2c */
+    uint64_t                            ExceptionParameter;     /**< 0x30 */
+    uint64_t                            Reserved;               /**< 0x38 */
+    uint8_t                             InstructionBytes[16];   /**< 0x40 */
+    HV_X64_SEGMENT_REGISTER             DsSegment;              /**< 0x50 */
+    HV_X64_SEGMENT_REGISTER             SsSegment;              /**< 0x60 */
+    uint64_t                            Rax;                    /**< 0x70 */
+    uint64_t                            Rcx;                    /**< 0x78 */
+    uint64_t                            Rdx;                    /**< 0x80 */
+    uint64_t                            Rbx;                    /**< 0x88 */
+    uint64_t                            Rsp;                    /**< 0x90 */
+    uint64_t                            Rbp;                    /**< 0x98 */
+    uint64_t                            Rsi;                    /**< 0xa0 */
+    uint64_t                            Rdi;                    /**< 0xa8 */
+    uint64_t                            R8;                     /**< 0xb0 */
+    uint64_t                            R9;                     /**< 0xb8 */
+    uint64_t                            R10;                    /**< 0xc0 */
+    uint64_t                            R11;                    /**< 0xc8 */
+    uint64_t                            R12;                    /**< 0xd0 */
+    uint64_t                            R13;                    /**< 0xd8 */
+    uint64_t                            R14;                    /**< 0xe0 */
+    uint64_t                            R15;                    /**< 0xe8 */
+} HV_X64_EXCEPTION_INTERCEPT_MESSAGE;
+AssertCompileSize(HV_X64_EXCEPTION_INTERCEPT_MESSAGE, 0xf0);
+/** Pointer to a HvMessageTypeX64ExceptionIntercept payload. */
+typedef HV_X64_EXCEPTION_INTERCEPT_MESSAGE *PHV_X64_EXCEPTION_INTERCEPT_MESSAGE;
+/** Pointer to a ocnst HvMessageTypeX64ExceptionIntercept payload. */
+typedef HV_X64_EXCEPTION_INTERCEPT_MESSAGE const *PCHV_X64_EXCEPTION_INTERCEPT_MESSAGE;
+
+
+/**
+ * The payload format for HvMessageTypeX64Halt,
+ *
+ * @note This message does not include HV_X64_INTERCEPT_MESSAGE_HEADER!
+ */
+typedef struct
+{
+    /** Seems to be a zero 64-bit field here.  */
+    uint64_t    u64Reserved;
+} HV_X64_HALT_MESSAGE;
+/** Pointer to a HvMessageTypeX64Halt payload. */
+typedef HV_X64_HALT_MESSAGE *PHV_X64_HALT_MESSAGE;
+/** Pointer to a const HvMessageTypeX64Halt payload. */
+typedef HV_X64_HALT_MESSAGE const *PCHV_X64_HALT_MESSAGE;
+
+/** Full HvMessageTypeX64Halt message. */
+typedef struct
+{
+    HV_MESSAGE_HEADER                   MsgHdr;
+    HV_X64_HALT_MESSAGE                 Payload;
+} HV_X64_HALT_MESSAGE_FULL;
+
+
+/**
+ * The payload format for HvMessageTypeX64InterruptWindow,
+ *
+ * @note This message does not include HV_X64_INTERCEPT_MESSAGE_HEADER!
+ */
+typedef struct
+{
+    /** 0x00: The usual intercept header. */
+    HV_X64_INTERCEPT_MESSAGE_HEADER     Header;
+    /** 0x28: What's pending. */
+    HV_X64_PENDING_INTERRUPTION_TYPE    Type;
+    /** 0x2c: Explicit structure alignment padding. */
+    uint32_t                            u32ExplicitPadding;
+} HV_X64_INTERRUPT_WINDOW_MESSAGE;
+AssertCompileSize(HV_X64_INTERRUPT_WINDOW_MESSAGE, 0x30);
+/** Pointer to a HvMessageTypeX64InterruptWindow payload. */
+typedef HV_X64_INTERRUPT_WINDOW_MESSAGE *PHV_X64_INTERRUPT_WINDOW_MESSAGE;
+/** Pointer to a const HvMessageTypeX64InterruptWindow payload. */
+typedef HV_X64_INTERRUPT_WINDOW_MESSAGE const *PCHV_X64_INTERRUPT_WINDOW_MESSAGE;
+
+/** Full HvMessageTypeX64InterruptWindow message. */
+typedef struct
+{
+    /** Payload size is 0x30.   */
+    HV_MESSAGE_HEADER                   MsgHdr;
+    HV_X64_INTERRUPT_WINDOW_MESSAGE     Payload;
+} HV_X64_INTERRUPT_WINDOW_MESSAGE_FULL;
+
+
+
+/** Hyper-V SynIC message. */
+typedef struct
+{
+    HV_MESSAGE_HEADER   Header;
+    /** 0x10 */
+    union
+    {
+        uint64_t                            Payload[HV_MESSAGE_MAX_PAYLOAD_QWORD_COUNT];
+
+        /** Common header for X64 intercept messages.
+         * The HvMessageTypeUnrecoverableException message only has this.  */
+        HV_X64_INTERCEPT_MESSAGE_HEADER     X64InterceptHeader;
+        /** HvMessageTypeGpaIntercept, HvMessageTypeUnmappedGpa. */
+        HV_X64_MEMORY_INTERCEPT_MESSAGE     X64MemoryIntercept;
+        /** HvMessageTypeX64IoPortIntercept */
+        HV_X64_IO_PORT_INTERCEPT_MESSAGE    X64IoPortIntercept;
+        /** HvMessageTypeX64MsrIntercept */
+        HV_X64_MSR_INTERCEPT_MESSAGE        X64MsrIntercept;
+        /** HvMessageTypeX64CpuidIntercept */
+        HV_X64_CPUID_INTERCEPT_MESSAGE      X64CpuIdIntercept;
+        /** HvMessageTypeX64ExceptionIntercept */
+        HV_X64_EXCEPTION_INTERCEPT_MESSAGE  X64ExceptionIntercept;
+        /** HvMessageTypeX64Halt.
+         * @note No intercept header?  */
+        HV_X64_HALT_MESSAGE                 X64Halt;
+        /** HvMessageTypeX64InterruptWindow. */
+        HV_X64_INTERRUPT_WINDOW_MESSAGE     X64InterruptWindow;
+    };
+} HV_MESSAGE;
+AssertCompileSize(HV_MESSAGE, HV_MESSAGE_SIZE);
+/** Pointer to a Hyper-V SynIC message. */
+typedef HV_MESSAGE *PHV_MESSAGE;
+/** Pointer to const a Hyper-V SynIC message. */
+typedef HV_MESSAGE const *PCHV_MESSAGE;
+
+#endif /* !IPRT_INCLUDED_nt_hyperv_h */
+