1 | /** @file
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2 | * GVM - The Global VM Data.
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3 | */
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4 |
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5 | /*
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6 | * Copyright (C) 2007-2010 Oracle Corporation
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7 | *
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8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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9 | * available from http://www.virtualbox.org. This file is free software;
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10 | * you can redistribute it and/or modify it under the terms of the GNU
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11 | * General Public License (GPL) as published by the Free Software
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12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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15 | *
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16 | * The contents of this file may alternatively be used under the terms
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17 | * of the Common Development and Distribution License Version 1.0
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18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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19 | * VirtualBox OSE distribution, in which case the provisions of the
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20 | * CDDL are applicable instead of those of the GPL.
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21 | *
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22 | * You may elect to license modified versions of this file under the
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23 | * terms and conditions of either the GPL or the CDDL or both.
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24 | */
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25 |
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26 |
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27 | #ifndef ___VBox_vmm_uvm_h
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28 | #define ___VBox_vmm_uvm_h
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29 |
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30 | #include <VBox/types.h>
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31 | #include <iprt/assert.h>
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32 |
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33 |
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34 | /**
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35 | * Per virtual CPU ring-3 (user mode) data.
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36 | */
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37 | typedef struct UVMCPU
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38 | {
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39 | /** Pointer to the UVM structure. */
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40 | PUVM pUVM;
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41 | /** Pointer to the VM structure. */
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42 | PVM pVM;
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43 | /** Pointer to the VMCPU structure. */
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44 | PVMCPU pVCpu;
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45 | /** The virtual CPU ID. */
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46 | RTCPUID idCpu;
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47 | /** Alignment padding. */
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48 | uint8_t abAlignment0[HC_ARCH_BITS == 32 ? 16 : 4];
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49 |
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50 | /** The VM internal data. */
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51 | union
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52 | {
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53 | #ifdef ___VMInternal_h
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54 | struct VMINTUSERPERVMCPU s;
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55 | #endif
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56 | uint8_t padding[512];
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57 | } vm;
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58 | } UVMCPU;
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59 | AssertCompileMemberAlignment(UVMCPU, vm, 32);
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60 |
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61 |
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62 | /**
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63 | * The ring-3 (user mode) VM structure.
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64 | *
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65 | * This structure is similar to VM and GVM except that it resides in swappable
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66 | * user memory. The main purpose is to assist bootstrapping, where it allows us
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67 | * to start EMT much earlier and gives PDMLdr somewhere to put it's VMMR0 data.
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68 | * It is also a nice place to put big things that are user mode only.
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69 | */
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70 | typedef struct UVM
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71 | {
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72 | /** Magic / eye-catcher (UVM_MAGIC). */
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73 | uint32_t u32Magic;
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74 | /** The number of virtual CPUs. */
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75 | uint32_t cCpus;
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76 | /** The ring-3 mapping of the shared VM structure. */
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77 | PVM pVM;
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78 | /** Pointer to the next VM.
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79 | * We keep a per process list of VM for the event that a process could
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80 | * contain more than one VM.
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81 | * @todo move this into vm.s!
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82 | */
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83 | struct UVM *pNext;
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84 |
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85 | /** Pointer to the optional method table provided by the VMM user. */
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86 | PCVMM2USERMETHODS pVmm2UserMethods;
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87 |
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88 | #if HC_ARCH_BITS == 32
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89 | /** Align the next member on a 32 byte boundary. */
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90 | uint8_t abAlignment0[HC_ARCH_BITS == 32 ? 12 : 0];
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91 | #endif
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92 |
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93 | /** The VM internal data. */
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94 | union
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95 | {
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96 | #ifdef ___VMInternal_h
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97 | struct VMINTUSERPERVM s;
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98 | #endif
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99 | uint8_t padding[512];
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100 | } vm;
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101 |
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102 | /** The MM data. */
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103 | union
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104 | {
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105 | #ifdef ___MMInternal_h
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106 | struct MMUSERPERVM s;
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107 | #endif
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108 | uint8_t padding[32];
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109 | } mm;
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110 |
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111 | /** The PDM data. */
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112 | union
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113 | {
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114 | #ifdef ___PDMInternal_h
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115 | struct PDMUSERPERVM s;
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116 | #endif
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117 | uint8_t padding[128];
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118 | } pdm;
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119 |
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120 | /** The STAM data. */
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121 | union
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122 | {
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123 | #ifdef ___STAMInternal_h
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124 | struct STAMUSERPERVM s;
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125 | #endif
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126 | uint8_t padding[6464];
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127 | } stam;
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128 |
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129 | /** Per virtual CPU data. */
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130 | UVMCPU aCpus[1];
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131 | } UVM;
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132 | AssertCompileMemberAlignment(UVM, vm, 32);
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133 | AssertCompileMemberAlignment(UVM, mm, 32);
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134 | AssertCompileMemberAlignment(UVM, pdm, 32);
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135 | AssertCompileMemberAlignment(UVM, stam, 32);
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136 | AssertCompileMemberAlignment(UVM, aCpus, 32);
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137 |
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138 | /** The UVM::u32Magic value (Brad Mehldau). */
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139 | #define UVM_MAGIC 0x19700823
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140 |
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141 | /** @def UVM_ASSERT_VALID_EXT_RETURN
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142 | * Asserts a user mode VM handle is valid for external access.
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143 | */
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144 | #define UVM_ASSERT_VALID_EXT_RETURN(a_pUVM, a_rc) \
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145 | AssertMsgReturn( RT_VALID_ALIGNED_PTR(a_pUVM, PAGE_SIZE) \
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146 | && (a_pUVM)->u32Magic == UVM_MAGIC, \
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147 | ("a_pUVM=%p u32Magic=%#x\n", (a_pUVM), \
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148 | RT_VALID_ALIGNED_PTR(a_pUVM, PAGE_SIZE) ? (a_pUVM)->u32Magic : 0), \
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149 | (a_rc))
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150 |
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151 | #endif
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152 |
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