1 | /* $Id: MM.cpp 1480 2007-03-14 18:27:47Z vboxsync $ */
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2 | /** @file
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3 | * MM - Memory Monitor(/Manager).
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License as published by the Free Software Foundation,
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13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * If you received this file as part of a commercial VirtualBox
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18 | * distribution, then only the terms of your commercial VirtualBox
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19 | * license agreement apply instead of the previous paragraph.
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20 | */
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21 |
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22 |
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23 | /** @page pg_mm MM - The Memory Monitor/Manager
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24 | *
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25 | * It seems like this is going to be the entity taking care of memory allocations
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26 | * and the locking of physical memory for a VM. MM will track these allocations and
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27 | * pinnings so pointer conversions, memory read and write, and correct clean up can
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28 | * be done.
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29 | *
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30 | * Memory types:
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31 | * - Hypervisor Memory Area (HMA).
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32 | * - Page tables.
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33 | * - Physical pages.
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34 | *
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35 | * The first two types are not accessible using the generic conversion functions
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36 | * for GC memory, there are special functions for these.
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37 | *
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38 | *
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39 | * A decent structure for this component need to be eveloped as we see usage. One
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40 | * or two rewrites is probabaly needed to get it right...
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41 | *
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42 | *
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43 | *
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44 | * @section Hypervisor Memory Area
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45 | *
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46 | * The hypervisor is give 4MB of space inside the guest, we assume that we can
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47 | * steal an page directory entry from the guest OS without cause trouble. In
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48 | * addition to these 4MB we'll be mapping memory for the graphics emulation,
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49 | * but that will be an independant mapping.
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50 | *
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51 | * The 4MBs are divided into two main parts:
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52 | * -# The static code and data
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53 | * -# The shortlived page mappings.
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54 | *
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55 | * The first part is used for the VM structure, the core code (VMMSwitch),
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56 | * GC modules, and the alloc-only-heap. The size will be determined at a
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57 | * later point but initially we'll say 2MB of locked memory, most of which
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58 | * is non contiguous physically.
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59 | *
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60 | * The second part is used for mapping pages to the hypervisor. We'll be using
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61 | * a simple round robin when doing these mappings. This means that no-one can
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62 | * assume that a mapping hangs around for very long, while the managing of the
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63 | * pages are very simple.
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64 | *
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65 | *
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66 | *
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67 | * @section Page Pool
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68 | *
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69 | * The MM manages a per VM page pool from which other components can allocate
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70 | * locked, page aligned and page granular memory objects. The pool provides
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71 | * facilities to convert back and forth between physical and virtual addresses
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72 | * (within the pool of course). Several specialized interfaces are provided
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73 | * for the most common alloctions and convertions to save the caller from
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74 | * bothersome casting and extra parameter passing.
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75 | *
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76 | *
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77 | */
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78 |
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79 |
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80 |
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81 | /*******************************************************************************
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82 | * Header Files *
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83 | *******************************************************************************/
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84 | #define LOG_GROUP LOG_GROUP_MM
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85 | #include <VBox/mm.h>
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86 | #include <VBox/pgm.h>
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87 | #include <VBox/cfgm.h>
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88 | #include <VBox/ssm.h>
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89 | #include "MMInternal.h"
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90 | #include <VBox/vm.h>
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91 | #include <VBox/err.h>
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92 | #include <VBox/param.h>
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93 |
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94 | #include <VBox/log.h>
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95 | #include <iprt/alloc.h>
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96 | #include <iprt/assert.h>
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97 | #include <iprt/string.h>
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98 |
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99 |
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100 | /*******************************************************************************
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101 | * Internal Functions *
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102 | *******************************************************************************/
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103 | static int mmR3Term(PVM pVM, bool fKeepTheHeap);
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104 | static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM);
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105 | static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
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106 |
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107 |
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108 |
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109 | /**
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110 | * Initializes the MM.
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111 | *
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112 | * MM is managing the virtual address space (among other things) and
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113 | * setup the hypvervisor memory area mapping in the VM structure and
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114 | * the hypvervisor alloc-only-heap. Assuming the current init order
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115 | * and components the hypvervisor memory area looks like this:
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116 | * -# VM Structure.
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117 | * -# Hypervisor alloc only heap (also call Hypervisor memory region).
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118 | * -# Core code.
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119 | *
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120 | * MM determins the virtual address of the hypvervisor memory area by
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121 | * checking for location at previous run. If that property isn't available
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122 | * it will choose a default starting location, currently 0xe0000000.
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123 | *
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124 | * @returns VBox status code.
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125 | * @param pVM The VM to operate on.
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126 | */
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127 | MMR3DECL(int) MMR3Init(PVM pVM)
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128 | {
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129 | LogFlow(("MMR3Init\n"));
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130 |
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131 | /*
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132 | * Assert alignment, sizes and order.
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133 | */
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134 | AssertRelease(!(RT_OFFSETOF(VM, mm.s) & 31));
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135 | AssertRelease(sizeof(pVM->mm.s) <= sizeof(pVM->mm.padding));
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136 | AssertMsg(pVM->mm.s.offVM == 0, ("Already initialized!\n"));
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137 |
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138 | /*
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139 | * Init the structure.
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140 | */
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141 | pVM->mm.s.offVM = RT_OFFSETOF(VM, mm);
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142 | pVM->mm.s.offLookupHyper = NIL_OFFSET;
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143 |
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144 | /*
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145 | * Init the heap (may already be initialized already if someone used it).
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146 | */
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147 | if (!pVM->mm.s.pHeap)
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148 | {
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149 | int rc = mmr3HeapCreate(pVM, &pVM->mm.s.pHeap);
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150 | if (!VBOX_SUCCESS(rc))
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151 | return rc;
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152 | }
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153 |
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154 | /*
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155 | * Init the page pool.
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156 | */
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157 | int rc = mmr3PagePoolInit(pVM);
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158 | if (VBOX_SUCCESS(rc))
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159 | {
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160 | /*
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161 | * Init the hypervisor related stuff.
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162 | */
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163 | rc = mmr3HyperInit(pVM);
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164 | if (VBOX_SUCCESS(rc))
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165 | {
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166 | /*
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167 | * Register the saved state data unit.
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168 | */
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169 | rc = SSMR3RegisterInternal(pVM, "mm", 1, 1, sizeof(uint32_t) * 2,
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170 | NULL, mmR3Save, NULL,
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171 | NULL, mmR3Load, NULL);
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172 | if (VBOX_SUCCESS(rc))
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173 | return rc;
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174 | }
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175 |
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176 | /* .... failure .... */
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177 | mmR3Term(pVM, true /* keep the heap */);
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178 | }
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179 | else
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180 | mmr3HeapDestroy(pVM->mm.s.pHeap);
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181 | return rc;
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182 | }
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183 |
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184 |
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185 | /**
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186 | * Initializes the MM parts which depends on PGM being initialized.
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187 | *
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188 | * @returns VBox status code.
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189 | * @param pVM The VM to operate on.
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190 | * @remark No cleanup necessary since MMR3Term() will be called on failure.
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191 | */
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192 | MMR3DECL(int) MMR3InitPaging(PVM pVM)
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193 | {
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194 | LogFlow(("MMR3InitPaging:\n"));
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195 | bool fPreAlloc;
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196 | int rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "RamPreAlloc", &fPreAlloc);
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197 | if (rc == VERR_CFGM_VALUE_NOT_FOUND)
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198 | fPreAlloc = false;
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199 | else
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200 | AssertMsgRCReturn(rc, ("Configuration error: Failed to query integer \"RamPreAlloc\", rc=%Vrc.\n", rc), rc);
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201 |
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202 | uint64_t cbRam;
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203 | rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "RamSize", &cbRam);
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204 | if (rc == VERR_CFGM_VALUE_NOT_FOUND)
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205 | cbRam = 0;
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206 | if (VBOX_SUCCESS(rc) || rc == VERR_CFGM_VALUE_NOT_FOUND)
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207 | {
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208 | if (cbRam < PAGE_SIZE)
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209 | {
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210 | Log(("MM: No RAM configured\n"));
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211 | return VINF_SUCCESS;
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212 | }
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213 | #ifdef PGM_DYNAMIC_RAM_ALLOC
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214 | Log(("MM: %llu bytes of RAM%s\n", cbRam, fPreAlloc ? " (PreAlloc)" : ""));
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215 | pVM->mm.s.pvRamBaseHC = 0; /** @todo obsolete */
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216 | pVM->mm.s.cbRamBase = cbRam & PAGE_BASE_GC_MASK;
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217 | rc = MMR3PhysRegister(pVM, pVM->mm.s.pvRamBaseHC, 0, pVM->mm.s.cbRamBase, MM_RAM_FLAGS_DYNAMIC_ALLOC, "Main Memory");
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218 | if (VBOX_SUCCESS(rc))
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219 | {
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220 | /* Allocate the first chunk, as we'll map ROM ranges there. */
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221 | rc = PGM3PhysGrowRange(pVM, (RTGCPHYS)0);
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222 | if (VBOX_SUCCESS(rc))
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223 | {
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224 | /* Should we preallocate the entire guest RAM? */
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225 | if (fPreAlloc)
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226 | {
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227 | for (RTGCPHYS GCPhys = PGM_DYNAMIC_CHUNK_SIZE; GCPhys < cbRam; GCPhys += PGM_DYNAMIC_CHUNK_SIZE)
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228 | {
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229 | rc = PGM3PhysGrowRange(pVM, GCPhys);
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230 | if (VBOX_FAILURE(rc))
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231 | return rc;
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232 | }
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233 | }
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234 | return rc;
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235 | }
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236 | }
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237 | #else
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238 | unsigned cPages = cbRam >> PAGE_SHIFT;
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239 | Log(("MM: %llu bytes of RAM (%d pages)\n", cbRam, cPages));
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240 | rc = SUPPageAlloc(cPages, &pVM->mm.s.pvRamBaseHC);
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241 | if (VBOX_SUCCESS(rc))
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242 | {
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243 | pVM->mm.s.cbRamBase = cPages << PAGE_SHIFT;
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244 | rc = MMR3PhysRegister(pVM, pVM->mm.s.pvRamBaseHC, 0, pVM->mm.s.cbRamBase, 0, "Main Memory");
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245 | if (VBOX_SUCCESS(rc))
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246 | return rc;
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247 | SUPPageFree(pVM->mm.s.pvRamBaseHC);
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248 | }
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249 | else
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250 | LogRel(("MMR3InitPage: Failed to allocate %u bytes of RAM! rc=%Vrc\n", cPages << PAGE_SHIFT));
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251 | #endif
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252 | }
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253 | else
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254 | AssertMsgFailed(("Configuration error: Failed to query integer \"RamSize\", rc=%Vrc.\n", rc));
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255 |
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256 | LogFlow(("MMR3InitPaging: returns %Vrc\n", rc));
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257 | return rc;
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258 | }
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259 |
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260 |
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261 | /**
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262 | * Terminates the MM.
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263 | *
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264 | * Termination means cleaning up and freeing all resources,
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265 | * the VM it self is at this point powered off or suspended.
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266 | *
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267 | * @returns VBox status code.
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268 | * @param pVM The VM to operate on.
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269 | */
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270 | MMR3DECL(int) MMR3Term(PVM pVM)
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271 | {
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272 | return mmR3Term(pVM, false /* free the heap */);
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273 | }
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274 |
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275 |
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276 | /**
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277 | * Worker for MMR3Term and MMR3Init.
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278 | *
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279 | * The tricky bit here is that we must not destroy the heap if we're
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280 | * called from MMR3Init, otherwise we'll get into trouble when
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281 | * CFGMR3Term is called later in the bailout process.
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282 | *
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283 | * @returns VBox status code.
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284 | * @param pVM The VM to operate on.
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285 | * @param fKeepTheHeap Whether or not to keep the heap.
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286 | */
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287 | static int mmR3Term(PVM pVM, bool fKeepTheHeap)
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288 | {
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289 | /*
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290 | * Release locked memory.
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291 | * (Associated record are released by the heap.)
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292 | */
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293 | PMMLOCKEDMEM pLockedMem = pVM->mm.s.pLockedMem;
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294 | while (pLockedMem)
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295 | {
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296 | int rc = SUPPageUnlock(pLockedMem->pv);
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297 | AssertMsgRC(rc, ("SUPPageUnlock(%p) -> rc=%d\n", pLockedMem->pv, rc));
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298 | switch (pLockedMem->eType)
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299 | {
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300 | case MM_LOCKED_TYPE_HYPER:
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301 | rc = SUPPageFree(pLockedMem->pv);
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302 | AssertMsgRC(rc, ("SUPPageFree(%p) -> rc=%d\n", pLockedMem->pv, rc));
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303 | break;
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304 | case MM_LOCKED_TYPE_HYPER_NOFREE:
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305 | case MM_LOCKED_TYPE_HYPER_PAGES:
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306 | case MM_LOCKED_TYPE_PHYS:
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307 | /* nothing to do. */
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308 | break;
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309 | }
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310 | /* next */
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311 | pLockedMem = pLockedMem->pNext;
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312 | }
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313 |
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314 | /*
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315 | * Destroy the page pool.
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316 | */
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317 | mmr3PagePoolTerm(pVM);
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318 |
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319 | /*
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320 | * Destroy the heap if requested.
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321 | */
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322 | if (!fKeepTheHeap)
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323 | {
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324 | mmr3HeapDestroy(pVM->mm.s.pHeap);
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325 | pVM->mm.s.pHeap = NULL;
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326 | }
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327 |
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328 | /*
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329 | * Zero stuff to detect after termination use of the MM interface
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330 | */
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331 | pVM->mm.s.offLookupHyper = NIL_OFFSET;
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332 | pVM->mm.s.pLockedMem = NULL;
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333 | pVM->mm.s.pHyperHeapHC = NULL; /* freed above. */
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334 | pVM->mm.s.pHyperHeapGC = 0; /* freed above. */
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335 | pVM->mm.s.offVM = 0; /* init assertion on this */
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336 |
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337 | return 0;
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338 | }
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339 |
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340 |
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341 | /**
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342 | * Execute state save operation.
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343 | *
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344 | * @returns VBox status code.
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345 | * @param pVM VM Handle.
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346 | * @param pSSM SSM operation handle.
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347 | */
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348 | static DECLCALLBACK(int) mmR3Save(PVM pVM, PSSMHANDLE pSSM)
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349 | {
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350 | LogFlow(("mmR3Save:\n"));
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351 |
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352 | /* (PGM saves the physical memory.) */
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353 | SSMR3PutUInt(pSSM, pVM->mm.s.cbRAMSize);
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354 | return SSMR3PutUInt(pSSM, pVM->mm.s.cbRamBase);
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355 | }
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356 |
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357 |
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358 | /**
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359 | * Execute state load operation.
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360 | *
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361 | * @returns VBox status code.
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362 | * @param pVM VM Handle.
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363 | * @param pSSM SSM operation handle.
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364 | * @param u32Version Data layout version.
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365 | */
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366 | static DECLCALLBACK(int) mmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
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367 | {
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368 | LogFlow(("mmR3Load:\n"));
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369 |
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370 | /*
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371 | * Validate version.
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372 | */
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373 | if (u32Version != 1)
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374 | {
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375 | Log(("mmR3Load: Invalid version u32Version=%d!\n", u32Version));
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376 | return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
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377 | }
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378 |
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379 | /*
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380 | * Check the cbRAMSize and cbRamBase values.
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381 | */
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382 | RTUINT cb;
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383 | int rc = SSMR3GetUInt(pSSM, &cb);
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384 | if (VBOX_FAILURE(rc))
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385 | return rc;
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386 | if (cb != pVM->mm.s.cbRAMSize)
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387 | {
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388 | Log(("mmR3Load: Memory configuration has changed. cbRAMSize=%#x save %#x\n", pVM->mm.s.cbRAMSize, cb));
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389 | return VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH;
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390 | }
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391 |
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392 | rc = SSMR3GetUInt(pSSM, &cb);
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393 | if (VBOX_FAILURE(rc))
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394 | return rc;
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395 | if (cb != pVM->mm.s.cbRamBase)
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396 | {
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397 | Log(("mmR3Load: Memory configuration has changed. cbRamBase=%#x save %#x\n", pVM->mm.s.cbRamBase, cb));
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398 | return VERR_SSM_LOAD_MEMORY_SIZE_MISMATCH;
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399 | }
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400 |
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401 | /* PGM restores the physical memory. */
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402 | return rc;
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403 | }
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404 |
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405 |
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406 | /**
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407 | * Locks physical memory which backs a virtual memory range (HC) adding
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408 | * the required records to the pLockedMem list.
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409 | *
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410 | * @returns VBox status code.
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411 | * @param pVM The VM handle.
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412 | * @param pv Pointer to memory range which shall be locked down.
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413 | * This pointer is page aligned.
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414 | * @param cb Size of memory range (in bytes). This size is page aligned.
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415 | * @param eType Memory type.
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416 | * @param ppLockedMem Where to store the pointer to the created locked memory record.
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417 | * This is optional, pass NULL if not used.
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418 | * @param fSilentFailure Don't raise an error when unsuccessful. Upper layer with deal with it.
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419 | */
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420 | int mmr3LockMem(PVM pVM, void *pv, size_t cb, MMLOCKEDTYPE eType, PMMLOCKEDMEM *ppLockedMem, bool fSilentFailure)
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421 | {
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422 | Assert(RT_ALIGN_P(pv, PAGE_SIZE) == pv);
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423 | Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb);
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424 |
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425 | if (ppLockedMem)
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426 | *ppLockedMem = NULL;
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427 |
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428 | /*
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429 | * Allocate locked mem structure.
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430 | */
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431 | unsigned cPages = cb >> PAGE_SHIFT;
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432 | AssertReturn(cPages == (cb >> PAGE_SHIFT), VERR_OUT_OF_RANGE);
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433 | PMMLOCKEDMEM pLockedMem = (PMMLOCKEDMEM)MMR3HeapAlloc(pVM, MM_TAG_MM, RT_OFFSETOF(MMLOCKEDMEM, aPhysPages[cPages]));
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434 | if (!pLockedMem)
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435 | return VERR_NO_MEMORY;
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436 | pLockedMem->pv = pv;
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437 | pLockedMem->cb = cb;
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438 | pLockedMem->eType = eType;
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439 | memset(&pLockedMem->u, 0, sizeof(pLockedMem->u));
|
---|
440 |
|
---|
441 | /*
|
---|
442 | * Lock the memory.
|
---|
443 | */
|
---|
444 | int rc = SUPPageLock(pv, cb, &pLockedMem->aPhysPages[0]);
|
---|
445 | if (VBOX_SUCCESS(rc))
|
---|
446 | {
|
---|
447 | /*
|
---|
448 | * Setup the reserved field.
|
---|
449 | */
|
---|
450 | PSUPPAGE pPhysPage = &pLockedMem->aPhysPages[0];
|
---|
451 | for (unsigned c = cPages; c > 0; c--, pPhysPage++)
|
---|
452 | pPhysPage->uReserved = (RTHCUINTPTR)pLockedMem;
|
---|
453 |
|
---|
454 | /*
|
---|
455 | * Insert into the list.
|
---|
456 | *
|
---|
457 | * ASSUME no protected needed here as only one thread in the system can possibly
|
---|
458 | * be doing this. No other threads will walk this list either we assume.
|
---|
459 | */
|
---|
460 | pLockedMem->pNext = pVM->mm.s.pLockedMem;
|
---|
461 | pVM->mm.s.pLockedMem = pLockedMem;
|
---|
462 | /* Set return value. */
|
---|
463 | if (ppLockedMem)
|
---|
464 | *ppLockedMem = pLockedMem;
|
---|
465 | }
|
---|
466 | else
|
---|
467 | {
|
---|
468 | AssertMsgFailed(("SUPPageLock failed with rc=%d\n", rc));
|
---|
469 | MMR3HeapFree(pLockedMem);
|
---|
470 | if (!fSilentFailure)
|
---|
471 | rc = VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to lock %d bytes of host memory (out of memory)"), cb);
|
---|
472 | }
|
---|
473 |
|
---|
474 | return rc;
|
---|
475 | }
|
---|
476 |
|
---|
477 |
|
---|
478 | /**
|
---|
479 | * Maps a part of or an entire locked memory region into the guest context.
|
---|
480 | *
|
---|
481 | * @returns VBox status.
|
---|
482 | * God knows what happens if we fail...
|
---|
483 | * @param pVM VM handle.
|
---|
484 | * @param pLockedMem Locked memory structure.
|
---|
485 | * @param Addr GC Address where to start the mapping.
|
---|
486 | * @param iPage Page number in the locked memory region.
|
---|
487 | * @param cPages Number of pages to map.
|
---|
488 | * @param fFlags See the fFlags argument of PGR3Map().
|
---|
489 | */
|
---|
490 | int mmr3MapLocked(PVM pVM, PMMLOCKEDMEM pLockedMem, RTGCPTR Addr, unsigned iPage, size_t cPages, unsigned fFlags)
|
---|
491 | {
|
---|
492 | /*
|
---|
493 | * Adjust ~0 argument
|
---|
494 | */
|
---|
495 | if (cPages == ~(size_t)0)
|
---|
496 | cPages = (pLockedMem->cb >> PAGE_SHIFT) - iPage;
|
---|
497 | Assert(cPages != ~0U);
|
---|
498 | /* no incorrect arguments are accepted */
|
---|
499 | Assert(RT_ALIGN_GCPT(Addr, PAGE_SIZE, RTGCPTR) == Addr);
|
---|
500 | AssertMsg(iPage < (pLockedMem->cb >> PAGE_SHIFT), ("never even think about giving me a bad iPage(=%d)\n", iPage));
|
---|
501 | AssertMsg(iPage + cPages <= (pLockedMem->cb >> PAGE_SHIFT), ("never even think about giving me a bad cPages(=%d)\n", cPages));
|
---|
502 |
|
---|
503 | /*
|
---|
504 | * Map the the pages.
|
---|
505 | */
|
---|
506 | PSUPPAGE pPhysPage = &pLockedMem->aPhysPages[iPage];
|
---|
507 | while (cPages)
|
---|
508 | {
|
---|
509 | RTHCPHYS HCPhys = pPhysPage->Phys;
|
---|
510 | int rc = PGMMap(pVM, Addr, HCPhys, PAGE_SIZE, fFlags);
|
---|
511 | if (VBOX_FAILURE(rc))
|
---|
512 | {
|
---|
513 | /** @todo how the hell can we do a proper bailout here. */
|
---|
514 | return rc;
|
---|
515 | }
|
---|
516 |
|
---|
517 | /* next */
|
---|
518 | cPages--;
|
---|
519 | iPage++;
|
---|
520 | pPhysPage++;
|
---|
521 | Addr += PAGE_SIZE;
|
---|
522 | }
|
---|
523 |
|
---|
524 | return VINF_SUCCESS;
|
---|
525 | }
|
---|
526 |
|
---|
527 |
|
---|
528 | /**
|
---|
529 | * Convert HC Physical address to HC Virtual address.
|
---|
530 | *
|
---|
531 | * @returns VBox status.
|
---|
532 | * @param pVM VM handle.
|
---|
533 | * @param HCPhys The host context virtual address.
|
---|
534 | * @param ppv Where to store the resulting address.
|
---|
535 | * @thread The Emulation Thread.
|
---|
536 | */
|
---|
537 | MMR3DECL(int) MMR3HCPhys2HCVirt(PVM pVM, RTHCPHYS HCPhys, void **ppv)
|
---|
538 | {
|
---|
539 | /*
|
---|
540 | * Try page tables.
|
---|
541 | */
|
---|
542 | int rc = MMPagePhys2PageTry(pVM, HCPhys, ppv);
|
---|
543 | if (VBOX_SUCCESS(rc))
|
---|
544 | return rc;
|
---|
545 |
|
---|
546 | /*
|
---|
547 | * Iterate the locked memory - very slow.
|
---|
548 | */
|
---|
549 | uint32_t off = HCPhys & PAGE_OFFSET_MASK;
|
---|
550 | HCPhys &= X86_PTE_PAE_PG_MASK;
|
---|
551 | for (PMMLOCKEDMEM pCur = pVM->mm.s.pLockedMem; pCur; pCur = pCur->pNext)
|
---|
552 | {
|
---|
553 | size_t iPage = pCur->cb >> PAGE_SHIFT;
|
---|
554 | while (iPage-- > 0)
|
---|
555 | if ((pCur->aPhysPages[iPage].Phys & X86_PTE_PAE_PG_MASK) == HCPhys)
|
---|
556 | {
|
---|
557 | *ppv = (char *)pCur->pv + (iPage << PAGE_SHIFT) + off;
|
---|
558 | return VINF_SUCCESS;
|
---|
559 | }
|
---|
560 | }
|
---|
561 | /* give up */
|
---|
562 | return VERR_INVALID_POINTER;
|
---|
563 | }
|
---|
564 |
|
---|
565 |
|
---|
566 | /**
|
---|
567 | * Read memory from GC virtual address using the current guest CR3.
|
---|
568 | *
|
---|
569 | * @returns VBox status.
|
---|
570 | * @param pVM VM handle.
|
---|
571 | * @param pvDst Destination address (HC of course).
|
---|
572 | * @param GCPtr GC virtual address.
|
---|
573 | * @param cb Number of bytes to read.
|
---|
574 | */
|
---|
575 | MMR3DECL(int) MMR3ReadGCVirt(PVM pVM, void *pvDst, RTGCPTR GCPtr, size_t cb)
|
---|
576 | {
|
---|
577 | if (GCPtr - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
|
---|
578 | return MMR3HyperReadGCVirt(pVM, pvDst, GCPtr, cb);
|
---|
579 | return PGMPhysReadGCPtr(pVM, pvDst, GCPtr, cb);
|
---|
580 | }
|
---|
581 |
|
---|
582 |
|
---|
583 | /**
|
---|
584 | * Write to memory at GC virtual address translated using the current guest CR3.
|
---|
585 | *
|
---|
586 | * @returns VBox status.
|
---|
587 | * @param pVM VM handle.
|
---|
588 | * @param GCPtrDst GC virtual address.
|
---|
589 | * @param pvSrc The source address (HC of course).
|
---|
590 | * @param cb Number of bytes to read.
|
---|
591 | */
|
---|
592 | MMR3DECL(int) MMR3WriteGCVirt(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
|
---|
593 | {
|
---|
594 | if (GCPtrDst - pVM->mm.s.pvHyperAreaGC < pVM->mm.s.cbHyperArea)
|
---|
595 | return VERR_ACCESS_DENIED;
|
---|
596 | return PGMPhysWriteGCPtr(pVM, GCPtrDst, pvSrc, cb);
|
---|
597 | }
|
---|
598 |
|
---|