1 | /* $Id: PGMHandler.cpp 92703 2021-12-02 12:45:58Z vboxsync $ */
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2 | /** @file
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3 | * PGM - Page Manager / Monitor, Access Handlers.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2020 Oracle Corporation
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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 (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 |
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19 | /*********************************************************************************************************************************
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20 | * Header Files *
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21 | *********************************************************************************************************************************/
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22 | #define LOG_GROUP LOG_GROUP_PGM
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23 | #define VBOX_WITHOUT_PAGING_BIT_FIELDS /* 64-bit bitfields are just asking for trouble. See @bugref{9841} and others. */
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24 | #include <VBox/vmm/dbgf.h>
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25 | #include <VBox/vmm/pgm.h>
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26 | #include <VBox/vmm/cpum.h>
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27 | #include <VBox/vmm/iom.h>
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28 | #include <VBox/sup.h>
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29 | #include <VBox/vmm/mm.h>
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30 | #include <VBox/vmm/em.h>
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31 | #include <VBox/vmm/stam.h>
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32 | #include <VBox/vmm/dbgf.h>
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33 | #include <VBox/vmm/selm.h>
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34 | #include <VBox/vmm/ssm.h>
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35 | #include "PGMInternal.h"
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36 | #include <VBox/vmm/vm.h>
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37 | #include "PGMInline.h"
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38 | #include <VBox/dbg.h>
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39 |
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40 | #include <VBox/log.h>
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41 | #include <iprt/assert.h>
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42 | #include <iprt/alloc.h>
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43 | #include <iprt/asm.h>
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44 | #include <iprt/errcore.h>
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45 | #include <iprt/thread.h>
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46 | #include <iprt/string.h>
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47 | #include <VBox/param.h>
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48 | #include <VBox/vmm/hm.h>
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49 |
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50 |
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51 | /*********************************************************************************************************************************
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52 | * Internal Functions *
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53 | *********************************************************************************************************************************/
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54 | static DECLCALLBACK(int) pgmR3HandlerPhysicalOneClear(PAVLROGCPHYSNODECORE pNode, void *pvUser);
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55 | static DECLCALLBACK(int) pgmR3HandlerPhysicalOneSet(PAVLROGCPHYSNODECORE pNode, void *pvUser);
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56 | static DECLCALLBACK(int) pgmR3InfoHandlersPhysicalOne(PAVLROGCPHYSNODECORE pNode, void *pvUser);
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57 |
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58 |
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59 |
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60 |
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61 | /**
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62 | * Register a physical page access handler type, extended version.
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63 | *
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64 | * @returns VBox status code.
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65 | * @param pVM The cross context VM structure.
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66 | * @param enmKind The kind of access handler.
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67 | * @param fKeepPgmLock Whether to hold the PGM lock while calling the
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68 | * handler or not. Mainly for PGM callers.
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69 | * @param pfnHandlerR3 Pointer to the ring-3 handler callback.
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70 | * @param pfnHandlerR0 Pointer to the ring-0 handler callback.
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71 | * @param pfnPfHandlerR0 Pointer to the ring-0 \#PF handler callback.
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72 | * callback.
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73 | * @param pszDesc The type description.
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74 | * @param phType Where to return the type handle (cross context
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75 | * safe).
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76 | */
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77 | VMMR3_INT_DECL(int) PGMR3HandlerPhysicalTypeRegisterEx(PVM pVM, PGMPHYSHANDLERKIND enmKind, bool fKeepPgmLock,
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78 | PFNPGMPHYSHANDLER pfnHandlerR3,
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79 | R0PTRTYPE(PFNPGMPHYSHANDLER) pfnHandlerR0,
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80 | R0PTRTYPE(PFNPGMRZPHYSPFHANDLER) pfnPfHandlerR0,
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81 | const char *pszDesc, PPGMPHYSHANDLERTYPE phType)
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82 | {
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83 | AssertPtrReturn(pfnHandlerR3, VERR_INVALID_POINTER);
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84 | AssertReturn(pfnHandlerR0 != NIL_RTR0PTR || SUPR3IsDriverless(), VERR_INVALID_POINTER);
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85 | AssertReturn(pfnPfHandlerR0 != NIL_RTR0PTR || SUPR3IsDriverless(), VERR_INVALID_POINTER);
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86 | AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
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87 | AssertReturn( enmKind == PGMPHYSHANDLERKIND_WRITE
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88 | || enmKind == PGMPHYSHANDLERKIND_ALL
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89 | || enmKind == PGMPHYSHANDLERKIND_MMIO,
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90 | VERR_INVALID_PARAMETER);
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91 |
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92 | PPGMPHYSHANDLERTYPEINT pType;
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93 | int rc = MMHyperAlloc(pVM, sizeof(*pType), 0, MM_TAG_PGM_HANDLER_TYPES, (void **)&pType);
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94 | if (RT_SUCCESS(rc))
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95 | {
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96 | pType->u32Magic = PGMPHYSHANDLERTYPEINT_MAGIC;
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97 | pType->cRefs = 1;
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98 | pType->enmKind = enmKind;
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99 | pType->uState = enmKind == PGMPHYSHANDLERKIND_WRITE
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100 | ? PGM_PAGE_HNDL_PHYS_STATE_WRITE : PGM_PAGE_HNDL_PHYS_STATE_ALL;
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101 | pType->fKeepPgmLock = fKeepPgmLock;
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102 | pType->pfnHandlerR3 = pfnHandlerR3;
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103 | pType->pfnHandlerR0 = pfnHandlerR0;
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104 | pType->pfnPfHandlerR0 = pfnPfHandlerR0;
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105 | pType->pszDesc = pszDesc;
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106 |
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107 | PGM_LOCK_VOID(pVM);
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108 | RTListOff32Append(&pVM->pgm.s.CTX_SUFF(pTrees)->HeadPhysHandlerTypes, &pType->ListNode);
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109 | PGM_UNLOCK(pVM);
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110 |
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111 | *phType = MMHyperHeapPtrToOffset(pVM, pType);
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112 | LogFlow(("PGMR3HandlerPhysicalTypeRegisterEx: %p/%#x: enmKind=%d pfnHandlerR3=%RHv pfnHandlerR0=%RHv pszDesc=%s\n",
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113 | pType, *phType, enmKind, pfnHandlerR3, pfnPfHandlerR0, pszDesc));
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114 | return VINF_SUCCESS;
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115 | }
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116 | *phType = NIL_PGMPHYSHANDLERTYPE;
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117 | return rc;
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118 | }
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119 |
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120 |
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121 | /**
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122 | * Register a physical page access handler type.
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123 | *
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124 | * @returns VBox status code.
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125 | * @param pVM The cross context VM structure.
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126 | * @param enmKind The kind of access handler.
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127 | * @param fKeepPgmLock Whether to hold the PGM lock while calling the
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128 | * handler or not. Mainly for PGM callers.
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129 | * @param pfnHandlerR3 Pointer to the ring-3 handler callback.
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130 | * @param pszModR0 The name of the ring-0 module, NULL is an alias for
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131 | * the main ring-0 module.
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132 | * @param pszHandlerR0 The name of the ring-0 handler, NULL if the ring-3
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133 | * handler should be called.
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134 | * @param pszPfHandlerR0 The name of the ring-0 \#PF handler, NULL if the
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135 | * ring-3 handler should be called.
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136 | * @param pszModRC The name of the raw-mode context module, NULL is an
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137 | * alias for the main RC module.
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138 | * @param pszHandlerRC The name of the raw-mode context handler, NULL if
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139 | * the ring-3 handler should be called.
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140 | * @param pszPfHandlerRC The name of the raw-mode context \#PF handler, NULL
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141 | * if the ring-3 handler should be called.
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142 | * @param pszDesc The type description.
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143 | * @param phType Where to return the type handle (cross context
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144 | * safe).
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145 | */
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146 | VMMR3DECL(int) PGMR3HandlerPhysicalTypeRegister(PVM pVM, PGMPHYSHANDLERKIND enmKind, bool fKeepPgmLock,
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147 | R3PTRTYPE(PFNPGMPHYSHANDLER) pfnHandlerR3,
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148 | const char *pszModR0, const char *pszHandlerR0, const char *pszPfHandlerR0,
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149 | const char *pszModRC, const char *pszHandlerRC, const char *pszPfHandlerRC,
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150 | const char *pszDesc, PPGMPHYSHANDLERTYPE phType)
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151 | {
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152 | LogFlow(("PGMR3HandlerPhysicalTypeRegister: enmKind=%d pfnHandlerR3=%RHv pszModR0=%s pszHandlerR0=%s pszPfHandlerR0=%s pszModRC=%s pszHandlerRC=%s pszPfHandlerRC=%s pszDesc=%s\n",
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153 | enmKind, pfnHandlerR3, pszModR0, pszHandlerR0, pszPfHandlerR0, pszModRC, pszHandlerRC, pszPfHandlerRC, pszDesc));
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154 |
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155 | /*
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156 | * Validate input.
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157 | */
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158 | AssertPtrReturn(pfnHandlerR3, VERR_INVALID_POINTER);
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159 | AssertPtrNullReturn(pszModR0, VERR_INVALID_POINTER);
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160 | AssertPtrNullReturn(pszHandlerR0, VERR_INVALID_POINTER);
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161 | AssertPtrNullReturn(pszPfHandlerR0, VERR_INVALID_POINTER);
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162 | AssertPtrNullReturn(pszModRC, VERR_INVALID_POINTER);
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163 | AssertPtrNullReturn(pszHandlerRC, VERR_INVALID_POINTER);
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164 | AssertPtrNullReturn(pszPfHandlerRC, VERR_INVALID_POINTER);
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165 |
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166 | /*
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167 | * Resolve the R0 handlers.
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168 | */
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169 | R0PTRTYPE(PFNPGMPHYSHANDLER) pfnHandlerR0 = NIL_RTR0PTR;
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170 | R0PTRTYPE(PFNPGMR0PHYSPFHANDLER) pfnPfHandlerR0 = NIL_RTR0PTR;
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171 | int rc = VINF_SUCCESS;
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172 | if (!SUPR3IsDriverless())
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173 | {
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174 | rc = PDMR3LdrGetSymbolR0Lazy(pVM, pszHandlerR0 ? pszModR0 : NULL, NULL /*pszSearchPath*/,
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175 | pszHandlerR0 ? pszHandlerR0 : "pgmPhysHandlerRedirectToHC", &pfnHandlerR0);
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176 | if (RT_SUCCESS(rc))
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177 | {
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178 | rc = PDMR3LdrGetSymbolR0Lazy(pVM, pszPfHandlerR0 ? pszModR0 : NULL, NULL /*pszSearchPath*/,
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179 | pszPfHandlerR0 ? pszPfHandlerR0 : "pgmPhysPfHandlerRedirectToHC", &pfnPfHandlerR0);
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180 | AssertMsgRC(rc, ("Failed to resolve %s.%s, rc=%Rrc.\n", pszPfHandlerR0 ? pszModR0 : VMMR0_MAIN_MODULE_NAME,
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181 | pszPfHandlerR0 ? pszPfHandlerR0 : "pgmPhysHandlerRedirectToHC", rc));
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182 | }
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183 | else
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184 | AssertMsgFailed(("Failed to resolve %s.%s, rc=%Rrc.\n", pszHandlerR0 ? pszModR0 : VMMR0_MAIN_MODULE_NAME,
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185 | pszHandlerR0 ? pszHandlerR0 : "pgmPhysHandlerRedirectToHC", rc));
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186 | }
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187 | if (RT_SUCCESS(rc))
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188 | {
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189 | /*
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190 | * Resolve the GC handler.
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191 | */
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192 | RTRCPTR pfnHandlerRC = NIL_RTRCPTR;
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193 | RTRCPTR pfnPfHandlerRC = NIL_RTRCPTR;
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194 | if (VM_IS_RAW_MODE_ENABLED(pVM))
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195 | {
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196 | rc = PDMR3LdrGetSymbolRCLazy(pVM, pszHandlerRC ? pszModRC : NULL, NULL /*pszSearchPath*/,
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197 | pszHandlerRC ? pszHandlerRC : "pgmPhysHandlerRedirectToHC", &pfnHandlerRC);
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198 | if (RT_SUCCESS(rc))
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199 | {
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200 | rc = PDMR3LdrGetSymbolRCLazy(pVM, pszPfHandlerRC ? pszModRC : NULL, NULL /*pszSearchPath*/,
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201 | pszPfHandlerRC ? pszPfHandlerRC : "pgmPhysPfHandlerRedirectToHC", &pfnPfHandlerRC);
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202 | AssertMsgRC(rc, ("Failed to resolve %s.%s, rc=%Rrc.\n", pszPfHandlerRC ? pszModRC : VMMRC_MAIN_MODULE_NAME,
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203 | pszPfHandlerRC ? pszPfHandlerRC : "pgmPhysPfHandlerRedirectToHC", rc));
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204 | }
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205 | else
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206 | AssertMsgFailed(("Failed to resolve %s.%s, rc=%Rrc.\n", pszHandlerRC ? pszModRC : VMMRC_MAIN_MODULE_NAME,
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207 | pszHandlerRC ? pszHandlerRC : "pgmPhysHandlerRedirectToHC", rc));
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208 |
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209 | }
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210 | if (RT_SUCCESS(rc))
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211 | return PGMR3HandlerPhysicalTypeRegisterEx(pVM, enmKind, fKeepPgmLock, pfnHandlerR3,
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212 | pfnHandlerR0, pfnPfHandlerR0, pszDesc, phType);
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213 | }
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214 |
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215 | return rc;
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216 | }
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217 |
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218 |
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219 | /**
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220 | * Updates the physical page access handlers.
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221 | *
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222 | * @param pVM The cross context VM structure.
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223 | * @remark Only used when restoring a saved state.
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224 | */
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225 | void pgmR3HandlerPhysicalUpdateAll(PVM pVM)
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226 | {
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227 | LogFlow(("pgmHandlerPhysicalUpdateAll:\n"));
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228 |
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229 | /*
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230 | * Clear and set.
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231 | * (the right -> left on the setting pass is just bird speculating on cache hits)
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232 | */
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233 | PGM_LOCK_VOID(pVM);
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234 | RTAvlroGCPhysDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, true, pgmR3HandlerPhysicalOneClear, pVM);
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235 | RTAvlroGCPhysDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, false, pgmR3HandlerPhysicalOneSet, pVM);
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236 | PGM_UNLOCK(pVM);
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237 | }
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238 |
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239 |
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240 | /**
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241 | * Clears all the page level flags for one physical handler range.
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242 | *
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243 | * @returns 0
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244 | * @param pNode Pointer to a PGMPHYSHANDLER.
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245 | * @param pvUser Pointer to the VM.
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246 | */
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247 | static DECLCALLBACK(int) pgmR3HandlerPhysicalOneClear(PAVLROGCPHYSNODECORE pNode, void *pvUser)
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248 | {
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249 | PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)pNode;
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250 | PPGMRAMRANGE pRamHint = NULL;
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251 | RTGCPHYS GCPhys = pCur->Core.Key;
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252 | RTUINT cPages = pCur->cPages;
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253 | PVM pVM = (PVM)pvUser;
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254 | for (;;)
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255 | {
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256 | PPGMPAGE pPage;
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257 | int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, &pRamHint);
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258 | if (RT_SUCCESS(rc))
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259 | {
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260 | PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_NONE);
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261 |
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262 | #ifdef VBOX_WITH_NATIVE_NEM
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263 | /* Tell NEM about the protection change. */
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264 | if (VM_IS_NEM_ENABLED(pVM))
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265 | {
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266 | uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
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267 | PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
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268 | NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage),
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269 | PGM_RAMRANGE_CALC_PAGE_R3PTR(pRamHint, GCPhys),
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270 | pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
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271 | PGM_PAGE_SET_NEM_STATE(pPage, u2State);
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272 | }
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273 | #endif
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274 | }
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275 | else
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276 | AssertRC(rc);
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277 |
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278 | if (--cPages == 0)
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279 | return 0;
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280 | GCPhys += PAGE_SIZE;
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281 | }
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282 | }
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283 |
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284 |
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285 | /**
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286 | * Sets all the page level flags for one physical handler range.
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287 | *
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288 | * @returns 0
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289 | * @param pNode Pointer to a PGMPHYSHANDLER.
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290 | * @param pvUser Pointer to the VM.
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291 | */
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292 | static DECLCALLBACK(int) pgmR3HandlerPhysicalOneSet(PAVLROGCPHYSNODECORE pNode, void *pvUser)
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293 | {
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294 | PVM pVM = (PVM)pvUser;
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295 | PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)pNode;
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296 | PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
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297 | unsigned uState = pCurType->uState;
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298 | PPGMRAMRANGE pRamHint = NULL;
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299 | RTGCPHYS GCPhys = pCur->Core.Key;
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300 | RTUINT cPages = pCur->cPages;
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301 | for (;;)
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302 | {
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303 | PPGMPAGE pPage;
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304 | int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, &pRamHint);
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305 | if (RT_SUCCESS(rc))
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306 | {
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307 | PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, uState);
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308 |
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309 | #ifdef VBOX_WITH_NATIVE_NEM
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310 | /* Tell NEM about the protection change. */
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311 | if (VM_IS_NEM_ENABLED(pVM))
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312 | {
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313 | uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
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314 | PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
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315 | NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage),
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316 | PGM_RAMRANGE_CALC_PAGE_R3PTR(pRamHint, GCPhys),
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317 | pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
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318 | PGM_PAGE_SET_NEM_STATE(pPage, u2State);
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319 | }
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320 | #endif
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321 | }
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322 | else
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323 | AssertRC(rc);
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324 |
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325 | if (--cPages == 0)
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326 | return 0;
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327 | GCPhys += PAGE_SIZE;
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328 | }
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329 | }
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330 |
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331 |
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332 | /**
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333 | * Arguments for pgmR3InfoHandlersPhysicalOne and pgmR3InfoHandlersVirtualOne.
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334 | */
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335 | typedef struct PGMHANDLERINFOARG
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336 | {
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337 | /** The output helpers.*/
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338 | PCDBGFINFOHLP pHlp;
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339 | /** Pointer to the cross context VM handle. */
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340 | PVM pVM;
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341 | /** Set if statistics should be dumped. */
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342 | bool fStats;
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343 | } PGMHANDLERINFOARG, *PPGMHANDLERINFOARG;
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344 |
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345 |
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346 | /**
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347 | * Info callback for 'pgmhandlers'.
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348 | *
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349 | * @param pVM The cross context VM structure.
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350 | * @param pHlp The output helpers.
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351 | * @param pszArgs The arguments. phys or virt.
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352 | */
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353 | DECLCALLBACK(void) pgmR3InfoHandlers(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
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354 | {
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355 | /*
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356 | * Parse options.
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357 | */
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358 | PGMHANDLERINFOARG Args = { pHlp, pVM, /* .fStats = */ true };
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359 | if (pszArgs)
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360 | Args.fStats = strstr(pszArgs, "nost") == NULL;
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361 |
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362 | /*
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363 | * Dump the handlers.
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364 | */
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365 | pHlp->pfnPrintf(pHlp,
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366 | "Physical handlers: (PhysHandlers=%d (%#x))\n"
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367 | "%*s %*s %*s %*s HandlerGC UserGC Type Description\n",
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368 | pVM->pgm.s.pTreesR3->PhysHandlers, pVM->pgm.s.pTreesR3->PhysHandlers,
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369 | - (int)sizeof(RTGCPHYS) * 2, "From",
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370 | - (int)sizeof(RTGCPHYS) * 2 - 3, "- To (incl)",
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371 | - (int)sizeof(RTHCPTR) * 2 - 1, "HandlerHC",
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372 | - (int)sizeof(RTHCPTR) * 2 - 1, "UserHC");
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373 | RTAvlroGCPhysDoWithAll(&pVM->pgm.s.pTreesR3->PhysHandlers, true, pgmR3InfoHandlersPhysicalOne, &Args);
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374 | }
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375 |
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376 |
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377 | /**
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378 | * Displays one physical handler range.
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379 | *
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380 | * @returns 0
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381 | * @param pNode Pointer to a PGMPHYSHANDLER.
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382 | * @param pvUser Pointer to command helper functions.
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383 | */
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384 | static DECLCALLBACK(int) pgmR3InfoHandlersPhysicalOne(PAVLROGCPHYSNODECORE pNode, void *pvUser)
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385 | {
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386 | PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)pNode;
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387 | PPGMHANDLERINFOARG pArgs = (PPGMHANDLERINFOARG)pvUser;
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388 | PCDBGFINFOHLP pHlp = pArgs->pHlp;
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389 | PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pArgs->pVM, pCur);
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390 | const char *pszType;
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391 | switch (pCurType->enmKind)
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392 | {
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393 | case PGMPHYSHANDLERKIND_MMIO: pszType = "MMIO "; break;
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394 | case PGMPHYSHANDLERKIND_WRITE: pszType = "Write "; break;
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395 | case PGMPHYSHANDLERKIND_ALL: pszType = "All "; break;
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396 | default: pszType = "????"; break;
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397 | }
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398 | pHlp->pfnPrintf(pHlp,
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399 | "%RGp - %RGp %RHv %RHv %RHv %RHv %s %s\n",
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400 | pCur->Core.Key, pCur->Core.KeyLast, pCurType->pfnHandlerR3, pCur->pvUserR3,
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401 | pCurType->pfnPfHandlerR0, pCur->pvUserR0, pszType, pCur->pszDesc);
|
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402 | #ifdef VBOX_WITH_STATISTICS
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403 | if (pArgs->fStats)
|
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404 | pHlp->pfnPrintf(pHlp, " cPeriods: %9RU64 cTicks: %11RU64 Min: %11RU64 Avg: %11RU64 Max: %11RU64\n",
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405 | pCur->Stat.cPeriods, pCur->Stat.cTicks, pCur->Stat.cTicksMin,
|
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406 | pCur->Stat.cPeriods ? pCur->Stat.cTicks / pCur->Stat.cPeriods : 0, pCur->Stat.cTicksMax);
|
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407 | #endif
|
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408 | return 0;
|
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409 | }
|
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410 |
|
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