| 1 | /** @file
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| 2 | * Virtualization Infrastructure Driver (VID) API.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2018-2024 Oracle and/or its affiliates.
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| 7 | *
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| 8 | * This file is part of VirtualBox base platform packages, as
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| 9 | * available from https://www.virtualbox.org.
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or
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| 12 | * modify it under the terms of the GNU General Public License
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| 13 | * as published by the Free Software Foundation, in version 3 of the
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| 14 | * License.
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| 15 | *
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| 16 | * This program is distributed in the hope that it will be useful, but
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| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 19 | * General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 23 | *
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| 24 | * The contents of this file may alternatively be used under the terms
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| 25 | * of the Common Development and Distribution License Version 1.0
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| 26 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 27 | * in the VirtualBox distribution, in which case the provisions of the
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| 28 | * CDDL are applicable instead of those of the GPL.
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| 29 | *
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| 30 | * You may elect to license modified versions of this file under the
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| 31 | * terms and conditions of either the GPL or the CDDL or both.
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| 32 | *
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| 33 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 34 | */
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| 35 |
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| 36 | #ifndef IPRT_INCLUDED_nt_vid_h
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| 37 | #define IPRT_INCLUDED_nt_vid_h
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| 38 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 39 | # pragma once
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| 40 | #endif
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| 41 |
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| 42 | #include "hyperv.h"
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| 43 |
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| 44 |
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| 45 | /**
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| 46 | * Output from VidMessageSlotMap.
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| 47 | */
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| 48 | typedef struct VID_MAPPED_MESSAGE_SLOT
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| 49 | {
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| 50 | /** The message block mapping. */
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| 51 | struct _HV_MESSAGE *pMsgBlock;
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| 52 | /** Copy of input iCpu. */
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| 53 | uint32_t iCpu;
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| 54 | /** Explicit padding. */
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| 55 | uint32_t uParentAdvisory;
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| 56 | } VID_MAPPED_MESSAGE_SLOT;
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| 57 | /** Pointer to VidMessageSlotMap output structure. */
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| 58 | typedef VID_MAPPED_MESSAGE_SLOT *PVID_MAPPED_MESSAGE_SLOT;
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| 59 |
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| 60 |
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| 61 | /** @name VID_MESSAGE_MAPPING_HEADER::enmVidMsgType values (wild guess).
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| 62 | * @{ */
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| 63 | /** Type mask, strips flags. */
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| 64 | #define VID_MESSAGE_TYPE_MASK UINT32_C(0x00ffffff)
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| 65 | /** No return message necessary. */
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| 66 | #define VID_MESSAGE_TYPE_FLAG_NO_RETURN UINT32_C(0x01000000)
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| 67 | /** Observed message values. */
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| 68 | typedef enum
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| 69 | {
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| 70 | /** Invalid zero value. */
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| 71 | VidMessageInvalid = 0,
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| 72 | /** Guessing this means a message from the hypervisor. */
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| 73 | VidMessageHypervisorMessage = 0x00000c | VID_MESSAGE_TYPE_FLAG_NO_RETURN,
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| 74 | /** Guessing this means stop request completed. Message length is 1 byte. */
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| 75 | VidMessageStopRequestComplete = 0x00000d | VID_MESSAGE_TYPE_FLAG_NO_RETURN,
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| 76 | } VID_MESSAGE_TYPE;
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| 77 | AssertCompileSize(VID_MESSAGE_TYPE, 4);
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| 78 | /** @} */
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| 79 |
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| 80 | /**
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| 81 | * Header of the message mapping returned by VidMessageSlotMap.
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| 82 | */
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| 83 | typedef struct VID_MESSAGE_MAPPING_HEADER
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| 84 | {
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| 85 | /** Current guess is that this is VID_MESSAGE_TYPE. */
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| 86 | VID_MESSAGE_TYPE enmVidMsgType;
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| 87 | /** The message size or so it seems (0x100). */
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| 88 | uint32_t cbMessage;
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| 89 | /** So far these have been zero. */
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| 90 | uint32_t aZeroPPadding[2+4];
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| 91 | } VID_MESSAGE_MAPPING_HEADER;
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| 92 | AssertCompileSize(VID_MESSAGE_MAPPING_HEADER, 32);
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| 93 |
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| 94 | /**
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| 95 | * VID processor status (VidGetVirtualProcessorRunningStatus).
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| 96 | *
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| 97 | * @note This is used internally in VID.SYS, in 17101 it's at offset 8 in their
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| 98 | * 'pVCpu' structure.
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| 99 | */
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| 100 | typedef enum
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| 101 | {
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| 102 | VidProcessorStatusStopped = 0,
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| 103 | VidProcessorStatusRunning,
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| 104 | VidProcessorStatusSuspended,
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| 105 | VidProcessorStatusUndefined = 0xffff
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| 106 | } VID_PROCESSOR_STATUS;
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| 107 | AssertCompileSize(VID_PROCESSOR_STATUS, 4);
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| 108 |
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| 109 |
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| 110 | /** I/O control input for VidMessageSlotHandleAndGetNext. */
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| 111 | typedef struct VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT
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| 112 | {
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| 113 | HV_VP_INDEX iCpu;
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| 114 | uint32_t fFlags; /**< VID_MSHAGN_F_GET_XXX*/
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| 115 | uint32_t cMillies; /**< Not present in build 17758 as the API changed to always to infinite waits. */
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| 116 | } VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT;
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| 117 | /** Pointer to input for VidMessageSlotHandleAndGetNext. */
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| 118 | typedef VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT *PVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT;
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| 119 | /** Pointer to const input for VidMessageSlotHandleAndGetNext. */
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| 120 | typedef VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT const *PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT;
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| 121 |
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| 122 | /** @name VID_MSHAGN_F_GET_XXX - Flags for VidMessageSlotHandleAndGetNext
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| 123 | * @{ */
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| 124 | /** This will try get the next message, waiting if necessary.
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| 125 | * It is subject to NtAlertThread processing when it starts waiting. */
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| 126 | #define VID_MSHAGN_F_GET_NEXT_MESSAGE RT_BIT_32(0)
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| 127 | /** ACK the message as handled and resume execution/whatever.
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| 128 | * This is executed before VID_MSHAGN_F_GET_NEXT_MESSAGE and should not be
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| 129 | * subject to NtAlertThread side effects. */
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| 130 | #define VID_MSHAGN_F_HANDLE_MESSAGE RT_BIT_32(1)
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| 131 | /** Cancel VP execution (no other bit set).
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| 132 | * @since about build 17758. */
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| 133 | #define VID_MSHAGN_F_CANCEL RT_BIT_32(2)
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| 134 | /** @} */
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| 135 |
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| 136 | /** A 64-bit version of HV_PARTITION_PROPERTY_CODE. */
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| 137 | typedef int64_t VID_PARTITION_PROPERTY_CODE;
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| 138 |
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| 139 |
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| 140 | #ifdef IN_RING3
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| 141 | RT_C_DECLS_BEGIN
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| 142 |
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| 143 | /** Calling convention. */
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| 144 | #ifndef WINAPI
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| 145 | # define VIDAPI __stdcall
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| 146 | #else
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| 147 | # define VIDAPI WINAPI
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| 148 | #endif
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| 149 |
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| 150 | /** Partition handle. */
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| 151 | #ifndef WINAPI
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| 152 | typedef void *VID_PARTITION_HANDLE;
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| 153 | #else
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| 154 | typedef HANDLE VID_PARTITION_HANDLE;
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| 155 | #endif
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| 156 |
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| 157 | /**
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| 158 | * Gets the partition ID.
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| 159 | *
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| 160 | * The partition ID is the numeric identifier used when making hypercalls to the
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| 161 | * hypervisor.
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| 162 | *
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| 163 | * @note Starting with Windows 11 (or possibly earlier), this does not work on
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| 164 | * Exo partition as created by WHvCreatePartition. It returns a
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| 165 | * STATUS_NOT_IMPLEMENTED as the I/O control code is not allowed through.
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| 166 | * All partitions has an ID though, so just pure annoying blockheadedness
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| 167 | * sprung upon us w/o any chance of doing a memory managment rewrite in
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| 168 | * time.
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| 169 | */
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| 170 | DECLIMPORT(BOOL) VIDAPI VidGetHvPartitionId(VID_PARTITION_HANDLE hPartition, HV_PARTITION_ID *pidPartition);
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| 171 |
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| 172 | /**
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| 173 | * Get a partition property.
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| 174 | *
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| 175 | * @returns Success indicator (details in LastErrorValue).
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| 176 | * @param hPartition The partition handle.
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| 177 | * @param enmProperty The property to get. Is a HV_PARTITION_PROPERTY_CODE
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| 178 | * type, but seems to be passed around as a 64-bit integer
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| 179 | * for some reason.
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| 180 | * @param puValue Where to return the property value.
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| 181 | */
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| 182 | DECLIMPORT(BOOL) VIDAPI VidGetPartitionProperty(VID_PARTITION_HANDLE hPartition, VID_PARTITION_PROPERTY_CODE enmProperty,
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| 183 | PHV_PARTITION_PROPERTY puValue);
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| 184 |
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| 185 | /**
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| 186 | * @copydoc VidGetPartitionProperty
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| 187 | * @note Currently (Windows 11 GA) identical to VidGetPartitionProperty.
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| 188 | */
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| 189 | DECLIMPORT(BOOL) VIDAPI VidGetExoPartitionProperty(VID_PARTITION_HANDLE hPartition, VID_PARTITION_PROPERTY_CODE enmProperty,
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| 190 | PHV_PARTITION_PROPERTY puValue);
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| 191 |
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| 192 | /**
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| 193 | * Starts asynchronous execution of a virtual CPU.
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| 194 | */
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| 195 | DECLIMPORT(BOOL) VIDAPI VidStartVirtualProcessor(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu);
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| 196 |
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| 197 | /**
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| 198 | * Stops the asynchronous execution of a virtual CPU.
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| 199 | *
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| 200 | * @retval ERROR_VID_STOP_PENDING if busy with intercept, check messages.
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| 201 | */
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| 202 | DECLIMPORT(BOOL) VIDAPI VidStopVirtualProcessor(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu);
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| 203 |
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| 204 | /**
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| 205 | * WHvCreateVirtualProcessor boils down to a call to VidMessageSlotMap and
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| 206 | * some internal WinHvPlatform state fiddling.
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| 207 | *
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| 208 | * Looks like it maps memory and returns the pointer to it.
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| 209 | * VidMessageSlotHandleAndGetNext is later used to wait for the next message and
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| 210 | * put (??) it into that memory mapping.
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| 211 | *
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| 212 | * @returns Success indicator (details in LastErrorValue).
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| 213 | *
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| 214 | * @param hPartition The partition handle.
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| 215 | * @param pOutput Where to return the pointer to the message memory
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| 216 | * mapping. The CPU index is also returned here.
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| 217 | * @param iCpu The CPU to wait-and-get messages for.
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| 218 | */
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| 219 | DECLIMPORT(BOOL) VIDAPI VidMessageSlotMap(VID_PARTITION_HANDLE hPartition, PVID_MAPPED_MESSAGE_SLOT pOutput, HV_VP_INDEX iCpu);
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| 220 |
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| 221 | /**
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| 222 | * This is used by WHvRunVirtualProcessor to wait for the next exit msg.
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| 223 | *
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| 224 | * The message appears in the memory mapping returned by VidMessageSlotMap.
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| 225 | *
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| 226 | * @returns Success indicator (details only in LastErrorValue - LastStatusValue
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| 227 | * is not set).
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| 228 | * @retval STATUS_TIMEOUT for STATUS_TIMEOUT as well as STATUS_USER_APC and
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| 229 | * STATUS_ALERTED.
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| 230 | *
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| 231 | * @param hPartition The partition handle.
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| 232 | * @param iCpu The CPU to wait-and-get messages for.
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| 233 | * @param fFlags Flags, VID_MSHAGN_F_XXX.
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| 234 | *
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| 235 | * When starting or resuming execution, at least one of
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| 236 | * VID_MSHAGN_F_GET_NEXT_MESSAGE (bit 0) and
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| 237 | * VID_MSHAGN_F_HANDLE_MESSAGE (bit 1) must be set.
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| 238 | *
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| 239 | * When cancelling execution only VID_MSHAGN_F_CANCEL (big 2)
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| 240 | * must be set.
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| 241 | *
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| 242 | * @param cMillies The timeout, presumably in milliseconds. This parameter
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| 243 | * was dropped about build 17758.
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| 244 | *
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| 245 | * @todo Would be awfully nice if someone at Microsoft could hit at the
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| 246 | * flags here.
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| 247 | */
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| 248 | DECLIMPORT(BOOL) VIDAPI VidMessageSlotHandleAndGetNext(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu,
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| 249 | uint32_t fFlags, uint32_t cMillies);
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| 250 | /**
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| 251 | * Gets the processor running status.
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| 252 | *
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| 253 | * This is probably only available in special builds, as one of the early I/O
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| 254 | * control dispatching routines will not let it thru. Lower down routines does
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| 255 | * implement it, so it's possible to patch it into working. This works for
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| 256 | * build 17101: eb vid+12180 0f 84 98 00 00 00
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| 257 | *
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| 258 | * @retval ERROR_NOT_IMPLEMENTED
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| 259 | *
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| 260 | * @remarks VidExoFastIoControlPartition probably disapproves of this too. It
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| 261 | * could be very handy for debugging upon occation.
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| 262 | */
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| 263 | DECLIMPORT(BOOL) VIDAPI VidGetVirtualProcessorRunningStatus(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu,
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| 264 | VID_PROCESSOR_STATUS *penmStatus);
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| 265 |
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| 266 | /**
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| 267 | * For query virtual processor registers and other state information.
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| 268 | *
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| 269 | * @returns Success indicator (details in LastErrorValue).
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| 270 | */
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| 271 | DECLIMPORT(BOOL) VIDAPI VidGetVirtualProcessorState(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu,
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| 272 | HV_REGISTER_NAME const *paRegNames, uint32_t cRegisters,
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| 273 | HV_REGISTER_VALUE *paRegValues);
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| 274 |
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| 275 | /**
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| 276 | * For setting virtual processor registers and other state information.
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| 277 | *
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| 278 | * @returns Success indicator (details in LastErrorValue).
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| 279 | */
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| 280 | DECLIMPORT(BOOL) VIDAPI VidSetVirtualProcessorState(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu,
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| 281 | HV_REGISTER_NAME const *paRegNames, uint32_t cRegisters,
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| 282 | HV_REGISTER_VALUE const *paRegValues);
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| 283 |
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| 284 | /**
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| 285 | * Wrapper around the HvCallGetMemoryBalance hypercall.
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| 286 | *
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| 287 | * When VID.SYS processes the request, it will also query
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| 288 | * HvPartitionPropertyVirtualTlbPageCount, so we're passing a 3rd return
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| 289 | * parameter in case the API is ever extended to match the I/O control.
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| 290 | *
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| 291 | * @returns Success indicator (details in LastErrorValue).
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| 292 | * @retval ERROR_NOT_IMPLEMENTED for exo partitions.
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| 293 | *
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| 294 | * @param hPartition The partition handle.
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| 295 | * @param pcPagesAvailable Where to return the number of unused pages
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| 296 | * still available to the partition.
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| 297 | * @param pcPagesInUse Where to return the number of pages currently
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| 298 | * in use by the partition.
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| 299 | * @param pReserved Pointer to dummy value, just in case they
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| 300 | * modify the API to include the nested TLB size.
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| 301 | *
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| 302 | * @note Not available for exo partitions, unfortunately. The
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| 303 | * VidExoFastIoControlPartition function deflects it, failing it with
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| 304 | * STATUS_NOT_IMPLEMENTED / ERROR_NOT_IMPLEMENTED.
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| 305 | */
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| 306 | DECLIMPORT(BOOL) VIDAPI VidGetHvMemoryBalance(VID_PARTITION_HANDLE hPartition, uint64_t *pcPagesAvailable,
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| 307 | uint64_t *pcPagesInUse, uint64_t *pReserved);
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| 308 |
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| 309 | RT_C_DECLS_END
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| 310 | #endif /* IN_RING3 */
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| 311 |
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| 312 | #endif /* !IPRT_INCLUDED_nt_vid_h */
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| 313 |
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