1 | /* $Id: PGMAllBth.h 5999 2007-12-07 15:05:06Z vboxsync $ */
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2 | /** @file
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3 | * VBox - Page Manager, Shadow+Guest Paging Template - All context code.
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4 | *
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5 | * This file is a big challenge!
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6 | */
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7 |
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8 | /*
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9 | * Copyright (C) 2006-2007 innotek GmbH
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10 | *
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11 | * This file is part of VirtualBox Open Source Edition (OSE), as
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12 | * available from http://www.virtualbox.org. This file is free software;
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13 | * you can redistribute it and/or modify it under the terms of the GNU
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14 | * General Public License (GPL) as published by the Free Software
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15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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18 | */
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19 |
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20 | /*******************************************************************************
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21 | * Internal Functions *
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22 | *******************************************************************************/
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23 | __BEGIN_DECLS
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24 | PGM_BTH_DECL(int, Trap0eHandler)(PVM pVM, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault);
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25 | PGM_BTH_DECL(int, InvalidatePage)(PVM pVM, RTGCUINTPTR GCPtrPage);
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26 | PGM_BTH_DECL(int, SyncPage)(PVM pVM, GSTPDE PdeSrc, RTGCUINTPTR GCPtrPage, unsigned cPages, unsigned uErr);
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27 | PGM_BTH_DECL(int, CheckPageFault)(PVM pVM, uint32_t uErr, PSHWPDE pPdeDst, PGSTPDE pPdeSrc, RTGCUINTPTR GCPtrPage);
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28 | PGM_BTH_DECL(int, SyncPT)(PVM pVM, unsigned iPD, PGSTPD pPDSrc, RTGCUINTPTR GCPtrPage);
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29 | PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVM pVM, RTGCUINTPTR Addr, unsigned fPage, unsigned uErr);
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30 | PGM_BTH_DECL(int, PrefetchPage)(PVM pVM, RTGCUINTPTR GCPtrPage);
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31 | PGM_BTH_DECL(int, SyncCR3)(PVM pVM, uint32_t cr0, uint32_t cr3, uint32_t cr4, bool fGlobal);
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32 | #ifdef VBOX_STRICT
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33 | PGM_BTH_DECL(unsigned, AssertCR3)(PVM pVM, uint32_t cr3, uint32_t cr4, RTGCUINTPTR GCPtr = 0, RTGCUINTPTR cb = ~(RTGCUINTPTR)0);
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34 | #endif
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35 | #ifdef PGMPOOL_WITH_USER_TRACKING
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36 | DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackDeref)(PVM pVM, PPGMPOOLPAGE pShwPage, RTHCPHYS HCPhys);
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37 | #endif
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38 | __END_DECLS
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39 |
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40 |
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41 | /**
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42 | * #PF Handler for raw-mode guest execution.
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43 | *
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44 | * @returns VBox status code (appropriate for trap handling and GC return).
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45 | * @param pVM VM Handle.
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46 | * @param uErr The trap error code.
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47 | * @param pRegFrame Trap register frame.
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48 | * @param pvFault The fault address.
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49 | */
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50 | PGM_BTH_DECL(int, Trap0eHandler)(PVM pVM, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault)
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51 | {
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52 | #if (PGM_GST_TYPE == PGM_TYPE_32BIT || PGM_GST_TYPE == PGM_TYPE_REAL || PGM_GST_TYPE == PGM_TYPE_PROT || PGM_GST_TYPE == PGM_TYPE_PAE) && PGM_SHW_TYPE != PGM_TYPE_AMD64
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53 |
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54 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
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55 | # error "32-bit guest mode is only implemented for 32-bit and PAE shadow modes."
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56 | # endif
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57 |
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58 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE != PGM_TYPE_PAE
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59 | /*
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60 | * Hide the instruction fetch trap indicator for now.
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61 | */
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62 | /** @todo NXE will change this and we must fix NXE in the switcher too! */
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63 | if (uErr & X86_TRAP_PF_ID)
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64 | {
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65 | uErr &= ~X86_TRAP_PF_ID;
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66 | TRPMSetErrorCode(pVM, uErr);
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67 | }
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68 | # endif
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69 |
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70 | /*
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71 | * Get PDs.
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72 | */
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73 | int rc;
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74 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
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75 | # if PGM_GST_TYPE == PGM_TYPE_32BIT
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76 | const unsigned iPDSrc = (RTGCUINTPTR)pvFault >> GST_PD_SHIFT;
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77 | PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
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78 | # else /* PAE */
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79 | unsigned iPDSrc;
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80 | PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, (RTGCUINTPTR)pvFault, &iPDSrc);
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81 | # endif
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82 | # else
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83 | PGSTPD pPDSrc = NULL;
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84 | const unsigned iPDSrc = 0;
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85 | # endif
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86 |
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87 | const unsigned iPDDst = (RTGCUINTPTR)pvFault >> SHW_PD_SHIFT;
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88 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
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89 | PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
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90 | # else /* PAE */
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91 | PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]; /* We treat this as a PD with 2048 entries. */
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92 | # endif
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93 |
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94 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
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95 | /* Determine current privilege level */
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96 | uint32_t cpl = CPUMGetGuestCPL(pVM, pRegFrame);
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97 |
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98 | # ifdef PGM_SYNC_DIRTY_BIT
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99 | /*
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100 | * If we successfully correct the write protection fault due to dirty bit
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101 | * tracking, or this page fault is a genuine one, then return immediately.
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102 | */
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103 | STAM_PROFILE_START(&pVM->pgm.s.StatCheckPageFault, e);
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104 | rc = PGM_BTH_NAME(CheckPageFault)(pVM, uErr, &pPDDst->a[iPDDst], &pPDSrc->a[iPDSrc], (RTGCUINTPTR)pvFault);
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105 | STAM_PROFILE_STOP(&pVM->pgm.s.StatCheckPageFault, e);
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106 | if ( rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT
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107 | || rc == VINF_EM_RAW_GUEST_TRAP)
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108 | {
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109 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution)
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110 | = rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? &pVM->pgm.s.StatTrap0eDirtyAndAccessedBits : &pVM->pgm.s.StatTrap0eGuestTrap; });
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111 | LogBird(("Trap0eHandler: returns %s\n", rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? "VINF_SUCCESS" : "VINF_EM_RAW_GUEST_TRAP"));
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112 | return rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? VINF_SUCCESS : rc;
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113 | }
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114 | # endif
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115 |
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116 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0ePD[iPDSrc]);
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117 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
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118 |
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119 | /*
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120 | * A common case is the not-present error caused by lazy page table syncing.
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121 | *
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122 | * It is IMPORTANT that we weed out any access to non-present shadow PDEs here
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123 | * so we can safely assume that the shadow PT is present when calling SyncPage later.
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124 | *
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125 | * On failure, we ASSUME that SyncPT is out of memory or detected some kind
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126 | * of mapping conflict and defer to SyncCR3 in R3.
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127 | * (Again, we do NOT support access handlers for non-present guest pages.)
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128 | *
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129 | */
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130 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
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131 | GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
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132 | # else
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133 | GSTPDE PdeSrc;
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134 | PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
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135 | PdeSrc.n.u1Present = 1;
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136 | PdeSrc.n.u1Write = 1;
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137 | PdeSrc.n.u1Accessed = 1;
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138 | PdeSrc.n.u1User = 1;
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139 | # endif
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140 | if ( !(uErr & X86_TRAP_PF_P) /* not set means page not present instead of page protection violation */
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141 | && !pPDDst->a[iPDDst].n.u1Present
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142 | && PdeSrc.n.u1Present
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143 | )
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144 |
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145 | {
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146 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eSyncPT; });
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147 | STAM_PROFILE_START(&pVM->pgm.s.StatLazySyncPT, f);
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148 | LogFlow(("=>SyncPT %04x = %08x\n", iPDSrc, PdeSrc.au32[0]));
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149 | rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, (RTGCUINTPTR)pvFault);
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150 | if (VBOX_SUCCESS(rc))
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151 | {
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152 | STAM_PROFILE_STOP(&pVM->pgm.s.StatLazySyncPT, f);
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153 | return rc;
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154 | }
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155 | Log(("SyncPT: %d failed!! rc=%d\n", iPDSrc, rc));
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156 | VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3); /** @todo no need to do global sync, right? */
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157 | STAM_PROFILE_STOP(&pVM->pgm.s.StatLazySyncPT, f);
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158 | return VINF_PGM_SYNC_CR3;
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159 | }
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160 |
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161 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
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162 | /*
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163 | * Check if this address is within any of our mappings.
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164 | *
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165 | * This is *very* fast and it's gonna save us a bit of effort below and prevent
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166 | * us from screwing ourself with MMIO2 pages which have a GC Mapping (VRam).
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167 | * (BTW, it's impossible to have physical access handlers in a mapping.)
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168 | */
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169 | if (pgmMapAreMappingsEnabled(&pVM->pgm.s))
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170 | {
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171 | STAM_PROFILE_START(&pVM->pgm.s.StatMapping, a);
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172 | PPGMMAPPING pMapping = CTXALLSUFF(pVM->pgm.s.pMappings);
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173 | for ( ; pMapping; pMapping = CTXALLSUFF(pMapping->pNext))
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174 | {
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175 | if ((RTGCUINTPTR)pvFault < (RTGCUINTPTR)pMapping->GCPtr)
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176 | break;
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177 | if ((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pMapping->GCPtr < pMapping->cb)
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178 | {
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179 | /*
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180 | * The first thing we check is if we've got an undetected conflict.
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181 | */
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182 | if (!pVM->pgm.s.fMappingsFixed)
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183 | {
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184 | unsigned iPT = pMapping->cPTs;
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185 | while (iPT-- > 0)
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186 | if (pPDSrc->a[iPDSrc + iPT].n.u1Present)
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187 | {
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188 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eConflicts);
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189 | Log(("Trap0e: Detected Conflict %VGv-%VGv\n", pMapping->GCPtr, pMapping->GCPtrLast));
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190 | VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3); /** @todo no need to do global sync,right? */
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191 | STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
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192 | return VINF_PGM_SYNC_CR3;
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193 | }
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194 | }
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195 |
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196 | /*
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197 | * Check if the fault address is in a virtual page access handler range.
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198 | */
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199 | PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvFault);
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200 | if ( pCur
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201 | && pCur->enmType != PGMVIRTHANDLERTYPE_EIP
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202 | && (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
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203 | && ( uErr & X86_TRAP_PF_RW
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204 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
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205 | && pCur->enmType != PGMVIRTHANDLERTYPE_HYPERVISOR) ) ) /** r=bird: <- this is probably wrong. */
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206 | {
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207 | # ifdef IN_GC
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208 | STAM_PROFILE_START(&pCur->Stat, h);
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209 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
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210 | STAM_PROFILE_STOP(&pCur->Stat, h);
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211 | # else
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212 | AssertFailed();
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213 | rc = VINF_EM_RAW_EMULATE_INSTR; /* can't happen with VMX */
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214 | # endif
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215 | STAM_COUNTER_INC(&pVM->pgm.s.StatTrap0eMapHandler);
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216 | STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
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217 | return rc;
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218 | }
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219 |
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220 | /*
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221 | * Check if the EIP is in a virtual page access handler range.
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222 | */
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223 | if (cpl == 0)
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224 | {
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225 | RTGCPTR pvEIP;
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226 | rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip, &pvEIP);
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227 | if (VBOX_SUCCESS(rc))
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228 | {
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229 | PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvEIP);
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230 | if ( pCur
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231 | && pCur->enmType == PGMVIRTHANDLERTYPE_EIP
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232 | && (RTGCUINTPTR)pvEIP - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
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233 | {
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234 | # ifdef IN_GC
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235 | STAM_PROFILE_START(&pCur->Stat, h);
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236 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvEIP - (RTGCUINTPTR)pCur->GCPtr);
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237 | STAM_PROFILE_STOP(&pCur->Stat, h);
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238 | # else
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239 | AssertFailed();
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240 | rc = VINF_EM_RAW_EMULATE_INSTR; /* can't happen with VMX */
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241 | # endif
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242 | STAM_COUNTER_INC(&pVM->pgm.s.StatTrap0eMapHandler);
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243 | STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
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244 | return rc;
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245 | }
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246 | }
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247 | }
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248 |
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249 | /*
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250 | * Pretend we're not here and let the guest handle the trap.
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251 | */
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252 | TRPMSetErrorCode(pVM, uErr & ~X86_TRAP_PF_P);
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253 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eMap);
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254 | LogFlow(("PGM: Mapping access -> route trap to recompiler!\n"));
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255 | STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
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256 | return VINF_EM_RAW_GUEST_TRAP;
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257 | }
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258 | }
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259 | STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
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260 | } /* pgmAreMappingsEnabled(&pVM->pgm.s) */
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261 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
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262 |
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263 | /*
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264 | * Check if this fault address is flagged for special treatment,
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265 | * which means we'll have to figure out the physical address and
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266 | * check flags associated with it.
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267 | *
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268 | * ASSUME that we can limit any special access handling to pages
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269 | * in page tables which the guest believes to be present.
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270 | */
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271 | if (PdeSrc.n.u1Present)
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272 | {
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273 | RTGCPHYS GCPhys = ~0U;
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274 |
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275 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
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276 | uint32_t cr4 = CPUMGetGuestCR4(pVM);
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277 | if ( PdeSrc.b.u1Size
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278 | && (cr4 & X86_CR4_PSE))
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279 | GCPhys = (PdeSrc.u & GST_PDE4M_PG_MASK)
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280 | | ((RTGCPHYS)pvFault & (GST_BIG_PAGE_OFFSET_MASK ^ PAGE_OFFSET_MASK));
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281 | else
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282 | {
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283 | PVBOXPT pPTSrc;
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284 | # ifdef IN_GC
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285 | rc = PGMGCDynMapGCPage(pVM, PdeSrc.u & GST_PDE_PG_MASK, (void **)&pPTSrc);
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286 | # else
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287 | pPTSrc = (PVBOXPT)MMPhysGCPhys2HCVirt(pVM, PdeSrc.u & GST_PDE_PG_MASK, sizeof(*pPTSrc));
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288 | if (pPTSrc == 0)
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289 | rc = VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
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290 | # endif
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291 | if (VBOX_SUCCESS(rc))
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292 | {
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293 | unsigned iPTESrc = ((RTGCUINTPTR)pvFault >> PAGE_SHIFT) & GST_PT_MASK;
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294 | if (pPTSrc->a[iPTESrc].n.u1Present)
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295 | GCPhys = pPTSrc->a[iPTESrc].u & GST_PTE_PG_MASK;
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296 | }
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297 | }
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298 | # else
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299 | /* No paging so the fault address is the physical address */
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300 | GCPhys = (RTGCPHYS)((RTGCUINTPTR)pvFault & ~PAGE_OFFSET_MASK);
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301 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
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302 |
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303 | /*
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304 | * If we have a GC address we'll check if it has any flags set.
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305 | */
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306 | if (GCPhys != ~0U)
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307 | {
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308 | STAM_PROFILE_START(&pVM->pgm.s.StatHandlers, b);
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309 |
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310 | PPGMPAGE pPage;
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311 | rc = pgmPhysGetPageEx(&pVM->pgm.s, GCPhys, &pPage);
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312 | if (VBOX_SUCCESS(rc))
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313 | {
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314 | if (pPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_HANDLER | MM_RAM_FLAGS_VIRTUAL_HANDLER)) /** @todo PAGE FLAGS */
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315 | {
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316 | if (pPage->HCPhys & MM_RAM_FLAGS_PHYSICAL_HANDLER) /** @todo PAGE FLAGS */
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317 | {
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318 | /*
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319 | * Physical page access handler.
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320 | */
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321 | const RTGCPHYS GCPhysFault = GCPhys | ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK);
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322 | PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->PhysHandlers, GCPhysFault);
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323 | if (pCur)
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324 | {
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325 | # ifdef PGM_SYNC_N_PAGES
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326 | /*
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327 | * If the region is write protected and we got a page not present fault, then sync
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328 | * the pages. If the fault was caused by a read, then restart the instruction.
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329 | * In case of write access continue to the GC write handler.
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330 | *
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331 | * ASSUMES that there is only one handler per page or that they have similar write properties.
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332 | */
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333 | if ( pCur->enmType == PGMPHYSHANDLERTYPE_PHYSICAL_WRITE
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334 | && !(uErr & X86_TRAP_PF_P))
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335 | {
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336 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
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337 | if ( VBOX_FAILURE(rc)
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338 | || !(uErr & X86_TRAP_PF_RW)
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339 | || rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE)
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340 | {
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341 | AssertRC(rc);
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342 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
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343 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
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344 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndPhys; });
|
---|
345 | return rc;
|
---|
346 | }
|
---|
347 | }
|
---|
348 | # endif
|
---|
349 |
|
---|
350 | AssertMsg( pCur->enmType != PGMPHYSHANDLERTYPE_PHYSICAL_WRITE
|
---|
351 | || (pCur->enmType == PGMPHYSHANDLERTYPE_PHYSICAL_WRITE && (uErr & X86_TRAP_PF_RW)),
|
---|
352 | ("Unexpected trap for physical handler: %08X (phys=%08x) HCPhys=%X uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
|
---|
353 |
|
---|
354 | #if defined(IN_GC) || defined(IN_RING0)
|
---|
355 | if (CTXALLSUFF(pCur->pfnHandler))
|
---|
356 | {
|
---|
357 | STAM_PROFILE_START(&pCur->Stat, h);
|
---|
358 | rc = pCur->CTXALLSUFF(pfnHandler)(pVM, uErr, pRegFrame, pvFault, GCPhysFault, CTXALLSUFF(pCur->pvUser));
|
---|
359 | STAM_PROFILE_STOP(&pCur->Stat, h);
|
---|
360 | }
|
---|
361 | else
|
---|
362 | #endif
|
---|
363 | rc = VINF_EM_RAW_EMULATE_INSTR;
|
---|
364 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersPhysical);
|
---|
365 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
366 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndPhys; });
|
---|
367 | return rc;
|
---|
368 | }
|
---|
369 | }
|
---|
370 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
371 | else
|
---|
372 | {
|
---|
373 | # ifdef PGM_SYNC_N_PAGES
|
---|
374 | /*
|
---|
375 | * If the region is write protected and we got a page not present fault, then sync
|
---|
376 | * the pages. If the fault was caused by a read, then restart the instruction.
|
---|
377 | * In case of write access continue to the GC write handler.
|
---|
378 | */
|
---|
379 | if ( (pPage->HCPhys & (MM_RAM_FLAGS_VIRTUAL_WRITE | MM_RAM_FLAGS_VIRTUAL_ALL)) == MM_RAM_FLAGS_VIRTUAL_WRITE /** @todo PAGE FLAGS */
|
---|
380 | && !(uErr & X86_TRAP_PF_P))
|
---|
381 | {
|
---|
382 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
|
---|
383 | if ( VBOX_FAILURE(rc)
|
---|
384 | || rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE
|
---|
385 | || !(uErr & X86_TRAP_PF_RW))
|
---|
386 | {
|
---|
387 | AssertRC(rc);
|
---|
388 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
|
---|
389 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
390 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndVirt; });
|
---|
391 | return rc;
|
---|
392 | }
|
---|
393 | }
|
---|
394 | # endif
|
---|
395 | /*
|
---|
396 | * Ok, it's an virtual page access handler.
|
---|
397 | *
|
---|
398 | * Since it's faster to search by address, we'll do that first
|
---|
399 | * and then retry by GCPhys if that fails.
|
---|
400 | */
|
---|
401 | /** @todo r=bird: perhaps we should consider looking up by physical address directly now? */
|
---|
402 | /** @note r=svl: true, but lookup on virtual address should remain as a fallback as phys & virt trees might be out of sync, because the
|
---|
403 | * page was changed without us noticing it (not-present -> present without invlpg or mov cr3, xxx)
|
---|
404 | */
|
---|
405 | PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvFault);
|
---|
406 | if (pCur)
|
---|
407 | {
|
---|
408 | AssertMsg(!((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
|
---|
409 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
|
---|
410 | || !(uErr & X86_TRAP_PF_P)
|
---|
411 | || (pCur->enmType == PGMVIRTHANDLERTYPE_WRITE && (uErr & X86_TRAP_PF_RW))),
|
---|
412 | ("Unexpected trap for virtual handler: %VGv (phys=%VGp) HCPhys=%HGp uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
|
---|
413 |
|
---|
414 | if ( pCur->enmType != PGMVIRTHANDLERTYPE_EIP
|
---|
415 | && (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
|
---|
416 | && ( uErr & X86_TRAP_PF_RW
|
---|
417 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
|
---|
418 | && pCur->enmType != PGMVIRTHANDLERTYPE_HYPERVISOR) ) ) /** @todo r=bird: _HYPERVISOR is impossible here because of mapping check. */
|
---|
419 | {
|
---|
420 | # ifdef IN_GC
|
---|
421 | STAM_PROFILE_START(&pCur->Stat, h);
|
---|
422 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
|
---|
423 | STAM_PROFILE_STOP(&pCur->Stat, h);
|
---|
424 | # else
|
---|
425 | rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
|
---|
426 | # endif
|
---|
427 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtual);
|
---|
428 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
429 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
|
---|
430 | return rc;
|
---|
431 | }
|
---|
432 | /* Unhandled part of a monitored page */
|
---|
433 | }
|
---|
434 | else
|
---|
435 | {
|
---|
436 | /* Check by physical address. */
|
---|
437 | PPGMVIRTHANDLER pCur;
|
---|
438 | unsigned iPage;
|
---|
439 | rc = pgmHandlerVirtualFindByPhysAddr(pVM, GCPhys + ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK),
|
---|
440 | &pCur, &iPage);
|
---|
441 | Assert(VBOX_SUCCESS(rc) || !pCur);
|
---|
442 | if ( pCur
|
---|
443 | && pCur->enmType != PGMVIRTHANDLERTYPE_EIP
|
---|
444 | && ( uErr & X86_TRAP_PF_RW
|
---|
445 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
|
---|
446 | && pCur->enmType != PGMVIRTHANDLERTYPE_HYPERVISOR) ) )
|
---|
447 | {
|
---|
448 | Assert((pCur->aPhysToVirt[iPage].Core.Key & X86_PTE_PAE_PG_MASK) == GCPhys);
|
---|
449 | # ifdef IN_GC
|
---|
450 | RTGCUINTPTR off = (iPage << PAGE_SHIFT) + ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK) - ((RTGCUINTPTR)pCur->GCPtr & PAGE_OFFSET_MASK);
|
---|
451 | Assert(off < pCur->cb);
|
---|
452 | STAM_PROFILE_START(&pCur->Stat, h);
|
---|
453 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, off);
|
---|
454 | STAM_PROFILE_STOP(&pCur->Stat, h);
|
---|
455 | # else
|
---|
456 | rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
|
---|
457 | # endif
|
---|
458 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtualByPhys);
|
---|
459 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
460 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
|
---|
461 | return rc;
|
---|
462 | }
|
---|
463 | }
|
---|
464 | }
|
---|
465 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
466 |
|
---|
467 | /*
|
---|
468 | * There is a handled area of the page, but this fault doesn't belong to it.
|
---|
469 | * We must emulate the instruction.
|
---|
470 | *
|
---|
471 | * To avoid crashing (non-fatal) in the interpreter and go back to the recompiler
|
---|
472 | * we first check if this was a page-not-present fault for a page with only
|
---|
473 | * write access handlers. Restart the instruction if it wasn't a write access.
|
---|
474 | */
|
---|
475 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersUnhandled);
|
---|
476 |
|
---|
477 | if ( !(pPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL)) /** @todo PAGE FLAGS */
|
---|
478 | && !(uErr & X86_TRAP_PF_P))
|
---|
479 | {
|
---|
480 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
|
---|
481 | if ( VBOX_FAILURE(rc)
|
---|
482 | || rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE
|
---|
483 | || !(uErr & X86_TRAP_PF_RW))
|
---|
484 | {
|
---|
485 | AssertRC(rc);
|
---|
486 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
|
---|
487 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
488 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndPhys; });
|
---|
489 | return rc;
|
---|
490 | }
|
---|
491 | }
|
---|
492 |
|
---|
493 | /** @todo This particular case can cause quite a lot of overhead. E.g. early stage of kernel booting in Ubuntu 6.06
|
---|
494 | * It's writing to an unhandled part of the LDT page several million times.
|
---|
495 | */
|
---|
496 | rc = PGMInterpretInstruction(pVM, pRegFrame, pvFault);
|
---|
497 | LogFlow(("PGM: PGMInterpretInstruction -> rc=%d HCPhys=%VHp%s%s\n",
|
---|
498 | rc, pPage->HCPhys, pPage->HCPhys & MM_RAM_FLAGS_PHYSICAL_HANDLER ? " phys" : "",
|
---|
499 | pPage->HCPhys & MM_RAM_FLAGS_VIRTUAL_HANDLER ? " virt" : ""));
|
---|
500 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
501 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndUnhandled; });
|
---|
502 | return rc;
|
---|
503 | } /* if any kind of handler */
|
---|
504 |
|
---|
505 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
506 | if (uErr & X86_TRAP_PF_P)
|
---|
507 | {
|
---|
508 | /*
|
---|
509 | * The page isn't marked, but it might still be monitored by a virtual page access handler.
|
---|
510 | * (ASSUMES no temporary disabling of virtual handlers.)
|
---|
511 | */
|
---|
512 | /** @todo r=bird: Since the purpose is to catch out of sync pages with virtual handler(s) here,
|
---|
513 | * we should correct both the shadow page table and physical memory flags, and not only check for
|
---|
514 | * accesses within the handler region but for access to pages with virtual handlers. */
|
---|
515 | PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvFault);
|
---|
516 | if (pCur)
|
---|
517 | {
|
---|
518 | AssertMsg( !((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
|
---|
519 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
|
---|
520 | || !(uErr & X86_TRAP_PF_P)
|
---|
521 | || (pCur->enmType == PGMVIRTHANDLERTYPE_WRITE && (uErr & X86_TRAP_PF_RW))),
|
---|
522 | ("Unexpected trap for virtual handler: %08X (phys=%08x) HCPhys=%X uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
|
---|
523 |
|
---|
524 | if ( pCur->enmType != PGMVIRTHANDLERTYPE_EIP
|
---|
525 | && (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
|
---|
526 | && ( uErr & X86_TRAP_PF_RW
|
---|
527 | || ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
|
---|
528 | && pCur->enmType != PGMVIRTHANDLERTYPE_HYPERVISOR) ) ) /** @todo r=bird: _HYPERVISOR is impossible here because of mapping check. */
|
---|
529 | {
|
---|
530 | # ifdef IN_GC
|
---|
531 | STAM_PROFILE_START(&pCur->Stat, h);
|
---|
532 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
|
---|
533 | STAM_PROFILE_STOP(&pCur->Stat, h);
|
---|
534 | # else
|
---|
535 | rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
|
---|
536 | # endif
|
---|
537 | STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtualUnmarked);
|
---|
538 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
539 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
|
---|
540 | return rc;
|
---|
541 | }
|
---|
542 | }
|
---|
543 | }
|
---|
544 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
545 | }
|
---|
546 | STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
|
---|
547 |
|
---|
548 | # ifdef PGM_OUT_OF_SYNC_IN_GC
|
---|
549 | /*
|
---|
550 | * We are here only if page is present in Guest page tables and trap is not handled
|
---|
551 | * by our handlers.
|
---|
552 | * Check it for page out-of-sync situation.
|
---|
553 | */
|
---|
554 | STAM_PROFILE_START(&pVM->pgm.s.StatOutOfSync, c);
|
---|
555 |
|
---|
556 | if (!(uErr & X86_TRAP_PF_P))
|
---|
557 | {
|
---|
558 | /*
|
---|
559 | * Page is not present in our page tables.
|
---|
560 | * Try to sync it!
|
---|
561 | * BTW, fPageShw is invalid in this branch!
|
---|
562 | */
|
---|
563 | if (uErr & X86_TRAP_PF_US)
|
---|
564 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
|
---|
565 | else /* supervisor */
|
---|
566 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
|
---|
567 |
|
---|
568 | # if defined(LOG_ENABLED) && !defined(IN_RING0)
|
---|
569 | RTGCPHYS GCPhys;
|
---|
570 | uint64_t fPageGst;
|
---|
571 | PGMGstGetPage(pVM, pvFault, &fPageGst, &GCPhys);
|
---|
572 | Log(("Page out of sync: %p eip=%08x PdeSrc.n.u1User=%d fPageGst=%08llx GCPhys=%VGp scan=%d\n",
|
---|
573 | pvFault, pRegFrame->eip, PdeSrc.n.u1User, fPageGst, GCPhys, CSAMDoesPageNeedScanning(pVM, (RTGCPTR)pRegFrame->eip)));
|
---|
574 | # endif /* LOG_ENABLED */
|
---|
575 |
|
---|
576 | # if PGM_WITH_PAGING(PGM_GST_TYPE) && !defined(IN_RING0)
|
---|
577 | if (cpl == 0)
|
---|
578 | {
|
---|
579 | uint64_t fPageGst;
|
---|
580 | rc = PGMGstGetPage(pVM, pvFault, &fPageGst, NULL);
|
---|
581 | if ( VBOX_SUCCESS(rc)
|
---|
582 | && !(fPageGst & X86_PTE_US))
|
---|
583 | {
|
---|
584 | /* Note: can't check for X86_TRAP_ID bit, because that requires execute disable support on the CPU */
|
---|
585 | if ( pvFault == (RTGCPTR)pRegFrame->eip
|
---|
586 | || (RTGCUINTPTR)pvFault - pRegFrame->eip < 8 /* instruction crossing a page boundary */
|
---|
587 | # ifdef CSAM_DETECT_NEW_CODE_PAGES
|
---|
588 | || ( !PATMIsPatchGCAddr(pVM, (RTGCPTR)pRegFrame->eip)
|
---|
589 | && CSAMDoesPageNeedScanning(pVM, (RTGCPTR)pRegFrame->eip)) /* any new code we encounter here */
|
---|
590 | # endif /* CSAM_DETECT_NEW_CODE_PAGES */
|
---|
591 | )
|
---|
592 | {
|
---|
593 | LogFlow(("CSAMExecFault %VGv\n", pRegFrame->eip));
|
---|
594 | rc = CSAMExecFault(pVM, (RTGCPTR)pRegFrame->eip);
|
---|
595 | if (rc != VINF_SUCCESS)
|
---|
596 | {
|
---|
597 | /*
|
---|
598 | * CSAM needs to perform a job in ring 3.
|
---|
599 | *
|
---|
600 | * Sync the page before going to the host context; otherwise we'll end up in a loop if
|
---|
601 | * CSAM fails (e.g. instruction crosses a page boundary and the next page is not present)
|
---|
602 | */
|
---|
603 | LogFlow(("CSAM ring 3 job\n"));
|
---|
604 | int rc2 = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, 1, uErr);
|
---|
605 | AssertRC(rc2);
|
---|
606 |
|
---|
607 | STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
|
---|
608 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eCSAM; });
|
---|
609 | return rc;
|
---|
610 | }
|
---|
611 | }
|
---|
612 | # ifdef CSAM_DETECT_NEW_CODE_PAGES
|
---|
613 | else
|
---|
614 | if ( uErr == X86_TRAP_PF_RW
|
---|
615 | && pRegFrame->ecx >= 0x100 /* early check for movswd count */
|
---|
616 | && pRegFrame->ecx < 0x10000
|
---|
617 | )
|
---|
618 | {
|
---|
619 | /* In case of a write to a non-present supervisor shadow page, we'll take special precautions
|
---|
620 | * to detect loading of new code pages.
|
---|
621 | */
|
---|
622 |
|
---|
623 | /*
|
---|
624 | * Decode the instruction.
|
---|
625 | */
|
---|
626 | RTGCPTR PC;
|
---|
627 | rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip, &PC);
|
---|
628 | if (rc == VINF_SUCCESS)
|
---|
629 | {
|
---|
630 | DISCPUSTATE Cpu;
|
---|
631 | uint32_t cbOp;
|
---|
632 | rc = EMInterpretDisasOneEx(pVM, (RTGCUINTPTR)PC, pRegFrame, &Cpu, &cbOp);
|
---|
633 |
|
---|
634 | /* For now we'll restrict this to rep movsw/d instructions */
|
---|
635 | if ( rc == VINF_SUCCESS
|
---|
636 | && Cpu.pCurInstr->opcode == OP_MOVSWD
|
---|
637 | && (Cpu.prefix & PREFIX_REP))
|
---|
638 | {
|
---|
639 | CSAMMarkPossibleCodePage(pVM, pvFault);
|
---|
640 | }
|
---|
641 | }
|
---|
642 | }
|
---|
643 | # endif /* CSAM_DETECT_NEW_CODE_PAGES */
|
---|
644 |
|
---|
645 | /*
|
---|
646 | * Mark this page as safe.
|
---|
647 | */
|
---|
648 | /** @todo not correct for pages that contain both code and data!! */
|
---|
649 | Log2(("CSAMMarkPage %p; scanned=%d\n", pvFault, true));
|
---|
650 | CSAMMarkPage(pVM, pvFault, true);
|
---|
651 | }
|
---|
652 | }
|
---|
653 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
654 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
|
---|
655 | if (VBOX_SUCCESS(rc))
|
---|
656 | {
|
---|
657 | /* The page was successfully synced, return to the guest. */
|
---|
658 | STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
|
---|
659 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSync; });
|
---|
660 | return VINF_SUCCESS;
|
---|
661 | }
|
---|
662 | }
|
---|
663 | else
|
---|
664 | {
|
---|
665 | /*
|
---|
666 | * A side effect of not flushing global PDEs are out of sync pages due
|
---|
667 | * to physical monitored regions, that are no longer valid.
|
---|
668 | * Assume for now it only applies to the read/write flag
|
---|
669 | */
|
---|
670 | if (VBOX_SUCCESS(rc) && (uErr & X86_TRAP_PF_RW))
|
---|
671 | {
|
---|
672 | if (uErr & X86_TRAP_PF_US)
|
---|
673 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
|
---|
674 | else /* supervisor */
|
---|
675 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
|
---|
676 |
|
---|
677 |
|
---|
678 | /*
|
---|
679 | * Note: Do NOT use PGM_SYNC_NR_PAGES here. That only works if the page is not present, which is not true in this case.
|
---|
680 | */
|
---|
681 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, 1, uErr);
|
---|
682 | if (VBOX_SUCCESS(rc))
|
---|
683 | {
|
---|
684 | /*
|
---|
685 | * Page was successfully synced, return to guest.
|
---|
686 | */
|
---|
687 | # ifdef VBOX_STRICT
|
---|
688 | RTGCPHYS GCPhys;
|
---|
689 | uint64_t fPageGst;
|
---|
690 | rc = PGMGstGetPage(pVM, pvFault, &fPageGst, &GCPhys);
|
---|
691 | Assert(VBOX_SUCCESS(rc) && fPageGst & X86_PTE_RW);
|
---|
692 | LogFlow(("Obsolete physical monitor page out of sync %VGv - phys %VGp flags=%08llx\n", pvFault, GCPhys, (uint64_t)fPageGst));
|
---|
693 |
|
---|
694 | uint64_t fPageShw;
|
---|
695 | rc = PGMShwGetPage(pVM, pvFault, &fPageShw, NULL);
|
---|
696 | Assert(VBOX_SUCCESS(rc) && fPageShw & X86_PTE_RW);
|
---|
697 | # endif /* VBOX_STRICT */
|
---|
698 | STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
|
---|
699 | STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncObsHnd; });
|
---|
700 | return VINF_SUCCESS;
|
---|
701 | }
|
---|
702 | }
|
---|
703 |
|
---|
704 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
705 | # ifdef VBOX_STRICT
|
---|
706 | /*
|
---|
707 | * Check for VMM page flags vs. Guest page flags consistency.
|
---|
708 | * Currently only for debug purposes.
|
---|
709 | */
|
---|
710 | if (VBOX_SUCCESS(rc))
|
---|
711 | {
|
---|
712 | /* Get guest page flags. */
|
---|
713 | uint64_t fPageGst;
|
---|
714 | rc = PGMGstGetPage(pVM, pvFault, &fPageGst, NULL);
|
---|
715 | if (VBOX_SUCCESS(rc))
|
---|
716 | {
|
---|
717 | uint64_t fPageShw;
|
---|
718 | rc = PGMShwGetPage(pVM, pvFault, &fPageShw, NULL);
|
---|
719 |
|
---|
720 | /*
|
---|
721 | * Compare page flags.
|
---|
722 | * Note: we have AVL, A, D bits desynched.
|
---|
723 | */
|
---|
724 | AssertMsg((fPageShw & ~(X86_PTE_A | X86_PTE_D | X86_PTE_AVL_MASK)) == (fPageGst & ~(X86_PTE_A | X86_PTE_D | X86_PTE_AVL_MASK)),
|
---|
725 | ("Page flags mismatch! pvFault=%p GCPhys=%VGp fPageShw=%08llx fPageGst=%08llx\n", pvFault, GCPhys, fPageShw, fPageGst));
|
---|
726 | }
|
---|
727 | else
|
---|
728 | AssertMsgFailed(("PGMGstGetPage rc=%Vrc\n", rc));
|
---|
729 | }
|
---|
730 | else
|
---|
731 | AssertMsgFailed(("PGMGCGetPage rc=%Vrc\n", rc));
|
---|
732 | # endif /* VBOX_STRICT */
|
---|
733 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
734 | }
|
---|
735 | STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
|
---|
736 | # endif /* PGM_OUT_OF_SYNC_IN_GC */
|
---|
737 | }
|
---|
738 | else
|
---|
739 | {
|
---|
740 | /*
|
---|
741 | * Page not present in Guest OS or invalid page table address.
|
---|
742 | * This is potential virtual page access handler food.
|
---|
743 | *
|
---|
744 | * For the present we'll say that our access handlers don't
|
---|
745 | * work for this case - we've already discarded the page table
|
---|
746 | * not present case which is identical to this.
|
---|
747 | *
|
---|
748 | * When we perchance find we need this, we will probably have AVL
|
---|
749 | * trees (offset based) to operate on and we can measure their speed
|
---|
750 | * agains mapping a page table and probably rearrange this handling
|
---|
751 | * a bit. (Like, searching virtual ranges before checking the
|
---|
752 | * physical address.)
|
---|
753 | */
|
---|
754 | }
|
---|
755 | }
|
---|
756 |
|
---|
757 |
|
---|
758 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
759 | /*
|
---|
760 | * Check if it's in a EIP based virtual page access handler range.
|
---|
761 | * This is only used for supervisor pages in flat mode.
|
---|
762 | */
|
---|
763 | /** @todo this stuff is completely broken by the out-of-sync stuff. since we don't use this stuff, that's not really a problem yet. */
|
---|
764 | STAM_PROFILE_START(&pVM->pgm.s.StatEIPHandlers, d);
|
---|
765 | if (cpl == 0)
|
---|
766 | {
|
---|
767 | RTGCPTR pvEIP;
|
---|
768 | rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip, &pvEIP);
|
---|
769 | if ( VBOX_SUCCESS(rc)
|
---|
770 | && pvEIP == (RTGCPTR)pRegFrame->eip)
|
---|
771 | {
|
---|
772 | PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvEIP);
|
---|
773 | if ( pCur
|
---|
774 | && pCur->enmType == PGMVIRTHANDLERTYPE_EIP
|
---|
775 | && (RTGCUINTPTR)pvEIP - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
|
---|
776 | {
|
---|
777 | LogFlow(("EIP handler\n"));
|
---|
778 | # ifdef IN_GC
|
---|
779 | STAM_PROFILE_START(&pCur->Stat, h);
|
---|
780 | rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvEIP - (RTGCUINTPTR)pCur->GCPtr);
|
---|
781 | STAM_PROFILE_STOP(&pCur->Stat, h);
|
---|
782 | # else
|
---|
783 | rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
|
---|
784 | # endif
|
---|
785 | STAM_PROFILE_STOP(&pVM->pgm.s.StatEIPHandlers, d);
|
---|
786 | return rc;
|
---|
787 | }
|
---|
788 | }
|
---|
789 | }
|
---|
790 | STAM_PROFILE_STOP(&pVM->pgm.s.StatEIPHandlers, d);
|
---|
791 |
|
---|
792 | /*
|
---|
793 | * Conclusion, this is a guest trap.
|
---|
794 | */
|
---|
795 | LogFlow(("PGM: Unhandled #PF -> route trap to recompiler!\n"));
|
---|
796 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eUnhandled);
|
---|
797 | return VINF_EM_RAW_GUEST_TRAP;
|
---|
798 | # else
|
---|
799 | /* present, but not a monitored page; perhaps the guest is probing physical memory */
|
---|
800 | return VINF_EM_RAW_EMULATE_INSTR;
|
---|
801 | # endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
802 |
|
---|
803 |
|
---|
804 | #else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
805 |
|
---|
806 | AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
|
---|
807 | return VERR_INTERNAL_ERROR;
|
---|
808 | #endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
809 | }
|
---|
810 |
|
---|
811 |
|
---|
812 | /**
|
---|
813 | * Emulation of the invlpg instruction.
|
---|
814 | *
|
---|
815 | *
|
---|
816 | * @returns VBox status code.
|
---|
817 | *
|
---|
818 | * @param pVM VM handle.
|
---|
819 | * @param GCPtrPage Page to invalidate.
|
---|
820 | *
|
---|
821 | * @remark ASSUMES that the guest is updating before invalidating. This order
|
---|
822 | * isn't required by the CPU, so this is speculative and could cause
|
---|
823 | * trouble.
|
---|
824 | *
|
---|
825 | * @todo Flush page or page directory only if necessary!
|
---|
826 | * @todo Add a #define for simply invalidating the page.
|
---|
827 | */
|
---|
828 | PGM_BTH_DECL(int, InvalidatePage)(PVM pVM, RTGCUINTPTR GCPtrPage)
|
---|
829 | {
|
---|
830 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
831 |
|
---|
832 | LogFlow(("InvalidatePage %x\n", GCPtrPage));
|
---|
833 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
834 | /*
|
---|
835 | * Get the shadow PD entry and skip out if this PD isn't present.
|
---|
836 | * (Guessing that it is frequent for a shadow PDE to not be present, do this first.)
|
---|
837 | */
|
---|
838 | const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
|
---|
839 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
840 | PX86PDE pPdeDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
|
---|
841 | # else
|
---|
842 | PX86PDEPAE pPdeDst = &pVM->pgm.s.CTXMID(ap,PaePDs[0])->a[iPDDst];
|
---|
843 | # endif
|
---|
844 | const SHWPDE PdeDst = *pPdeDst;
|
---|
845 | if (!PdeDst.n.u1Present)
|
---|
846 | {
|
---|
847 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePageSkipped));
|
---|
848 | return VINF_SUCCESS;
|
---|
849 | }
|
---|
850 |
|
---|
851 | /*
|
---|
852 | * Get the guest PD entry and calc big page.
|
---|
853 | */
|
---|
854 | # if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
855 | PX86PD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
|
---|
856 | const unsigned iPDSrc = GCPtrPage >> GST_PD_SHIFT;
|
---|
857 | GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
|
---|
858 | # else /* PAE */
|
---|
859 | unsigned iPDSrc;
|
---|
860 | PX86PD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
|
---|
861 |
|
---|
862 | GSTPDE PdeSrc;;
|
---|
863 | PdeSrc.u = pgmGstGetPaePDE(&pVM->pgm.s, GCPtrPage);
|
---|
864 | # endif
|
---|
865 |
|
---|
866 | const uint32_t cr4 = CPUMGetGuestCR4(pVM);
|
---|
867 | const bool fIsBigPage = PdeSrc.b.u1Size && (cr4 & X86_CR4_PSE);
|
---|
868 |
|
---|
869 | # ifdef IN_RING3
|
---|
870 | /*
|
---|
871 | * If a CR3 Sync is pending we may ignore the invalidate page operation
|
---|
872 | * depending on the kind of sync and if it's a global page or not.
|
---|
873 | * This doesn't make sense in GC/R0 so we'll skip it entirely there.
|
---|
874 | */
|
---|
875 | # ifdef PGM_SKIP_GLOBAL_PAGEDIRS_ON_NONGLOBAL_FLUSH
|
---|
876 | if ( VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3)
|
---|
877 | || ( VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3_NON_GLOBAL)
|
---|
878 | && fIsBigPage
|
---|
879 | && PdeSrc.b.u1Global
|
---|
880 | && (cr4 & X86_CR4_PGE)
|
---|
881 | )
|
---|
882 | )
|
---|
883 | # else
|
---|
884 | if (VM_FF_ISPENDING(pVM, VM_FF_PGM_SYNC_CR3 | VM_FF_PGM_SYNC_CR3_NON_GLOBAL) )
|
---|
885 | # endif
|
---|
886 | {
|
---|
887 | STAM_COUNTER_INC(&pVM->pgm.s.StatHCInvalidatePageSkipped);
|
---|
888 | return VINF_SUCCESS;
|
---|
889 | }
|
---|
890 | # endif /* IN_RING3 */
|
---|
891 |
|
---|
892 |
|
---|
893 | /*
|
---|
894 | * Deal with the Guest PDE.
|
---|
895 | */
|
---|
896 | int rc = VINF_SUCCESS;
|
---|
897 | if (PdeSrc.n.u1Present)
|
---|
898 | {
|
---|
899 | if (PdeDst.u & PGM_PDFLAGS_MAPPING)
|
---|
900 | {
|
---|
901 | /*
|
---|
902 | * Conflict - Let SyncPT deal with it to avoid duplicate code.
|
---|
903 | */
|
---|
904 | Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
|
---|
905 | rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
|
---|
906 | }
|
---|
907 | else if ( PdeSrc.n.u1User != PdeDst.n.u1User
|
---|
908 | || (!PdeSrc.n.u1Write && PdeDst.n.u1Write))
|
---|
909 | {
|
---|
910 | /*
|
---|
911 | * Mark not present so we can resync the PDE when it's used.
|
---|
912 | */
|
---|
913 | LogFlow(("InvalidatePage: Out-of-sync at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
|
---|
914 | GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
915 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
916 | pPdeDst->u = 0;
|
---|
917 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
|
---|
918 | PGM_INVL_GUEST_TLBS();
|
---|
919 | }
|
---|
920 | # ifdef PGM_SYNC_ACCESSED_BIT
|
---|
921 | else if (!PdeSrc.n.u1Accessed)
|
---|
922 | {
|
---|
923 | /*
|
---|
924 | * Mark not present so we can set the accessed bit.
|
---|
925 | */
|
---|
926 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
927 | pPdeDst->u = 0;
|
---|
928 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNAs));
|
---|
929 | PGM_INVL_GUEST_TLBS();
|
---|
930 | }
|
---|
931 | # endif
|
---|
932 | else if (!fIsBigPage)
|
---|
933 | {
|
---|
934 | /*
|
---|
935 | * 4KB - page.
|
---|
936 | */
|
---|
937 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
|
---|
938 | RTGCPHYS GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
|
---|
939 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT
|
---|
940 | GCPhys |= (iPDDst & 1) * (PAGE_SIZE/2);
|
---|
941 | # endif
|
---|
942 | if (pShwPage->GCPhys == GCPhys)
|
---|
943 | {
|
---|
944 | #if 0 /* likely cause of a major performance regression; must be SyncPageWorkerTrackDeref then */
|
---|
945 | const unsigned iPTEDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
946 | PSHWPT pPT = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
947 | if (pPT->a[iPTEDst].n.u1Present)
|
---|
948 | {
|
---|
949 | # ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
950 | /* This is very unlikely with caching/monitoring enabled. */
|
---|
951 | PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPT->a[iPTEDst].u & SHW_PTE_PG_MASK);
|
---|
952 | # endif
|
---|
953 | pPT->a[iPTEDst].u = 0;
|
---|
954 | }
|
---|
955 | #else /* Syncing it here isn't 100% safe and it's probably not worth spending time syncing it. */
|
---|
956 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
|
---|
957 | if (VBOX_SUCCESS(rc))
|
---|
958 | rc = VINF_SUCCESS;
|
---|
959 | #endif
|
---|
960 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4KBPages));
|
---|
961 | PGM_INVL_PG(GCPtrPage);
|
---|
962 | }
|
---|
963 | else
|
---|
964 | {
|
---|
965 | /*
|
---|
966 | * The page table address changed.
|
---|
967 | */
|
---|
968 | LogFlow(("InvalidatePage: Out-of-sync at %VGp PdeSrc=%RX64 PdeDst=%RX64 ShwGCPhys=%VGp iPDDst=%#x\n",
|
---|
969 | GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u, pShwPage->GCPhys, iPDDst));
|
---|
970 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
971 | pPdeDst->u = 0;
|
---|
972 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
|
---|
973 | PGM_INVL_GUEST_TLBS();
|
---|
974 | }
|
---|
975 | }
|
---|
976 | else
|
---|
977 | {
|
---|
978 | /*
|
---|
979 | * 4MB - page.
|
---|
980 | */
|
---|
981 | /* Before freeing the page, check if anything really changed. */
|
---|
982 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
|
---|
983 | RTGCPHYS GCPhys = PdeSrc.u & GST_PDE4M_PG_MASK;
|
---|
984 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT
|
---|
985 | GCPhys |= GCPtrPage & (1 << X86_PD_PAE_SHIFT);
|
---|
986 | # endif
|
---|
987 | if ( pShwPage->GCPhys == GCPhys
|
---|
988 | && pShwPage->enmKind == BTH_PGMPOOLKIND_PT_FOR_BIG)
|
---|
989 | {
|
---|
990 | /* ASSUMES a the given bits are identical for 4M and normal PDEs */
|
---|
991 | /** @todo PAT */
|
---|
992 | # ifdef PGM_SYNC_DIRTY_BIT
|
---|
993 | if ( (PdeSrc.u & (X86_PDE_P | X86_PDE_RW | X86_PDE_US | X86_PDE_PWT | X86_PDE_PCD))
|
---|
994 | == (PdeDst.u & (X86_PDE_P | X86_PDE_RW | X86_PDE_US | X86_PDE_PWT | X86_PDE_PCD))
|
---|
995 | && ( PdeSrc.b.u1Dirty /** @todo rainy day: What about read-only 4M pages? not very common, but still... */
|
---|
996 | || (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)))
|
---|
997 | # else
|
---|
998 | if ( (PdeSrc.u & (X86_PDE_P | X86_PDE_RW | X86_PDE_US | X86_PDE_PWT | X86_PDE_PCD))
|
---|
999 | == (PdeDst.u & (X86_PDE_P | X86_PDE_RW | X86_PDE_US | X86_PDE_PWT | X86_PDE_PCD)))
|
---|
1000 | # endif
|
---|
1001 | {
|
---|
1002 | LogFlow(("Skipping flush for big page containing %VGv (PD=%X)-> nothing has changed!\n", GCPtrPage, iPDSrc));
|
---|
1003 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4MBPagesSkip));
|
---|
1004 | return VINF_SUCCESS;
|
---|
1005 | }
|
---|
1006 | }
|
---|
1007 |
|
---|
1008 | /*
|
---|
1009 | * Ok, the page table is present and it's been changed in the guest.
|
---|
1010 | * If we're in host context, we'll just mark it as not present taking the lazy approach.
|
---|
1011 | * We could do this for some flushes in GC too, but we need an algorithm for
|
---|
1012 | * deciding which 4MB pages containing code likely to be executed very soon.
|
---|
1013 | */
|
---|
1014 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
1015 | pPdeDst->u = 0;
|
---|
1016 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4MBPages));
|
---|
1017 | DUMP_PDE_BIG("PGMInvalidatePage", iPDSrc, PdeSrc);
|
---|
1018 | PGM_INVL_BIG_PG(GCPtrPage);
|
---|
1019 | }
|
---|
1020 | }
|
---|
1021 | else
|
---|
1022 | {
|
---|
1023 | /*
|
---|
1024 | * Page directory is not present, mark shadow PDE not present.
|
---|
1025 | */
|
---|
1026 | if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
|
---|
1027 | {
|
---|
1028 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
1029 | pPdeDst->u = 0;
|
---|
1030 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNPs));
|
---|
1031 | PGM_INVL_PG(GCPtrPage);
|
---|
1032 | }
|
---|
1033 | else
|
---|
1034 | {
|
---|
1035 | Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
|
---|
1036 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDMappings));
|
---|
1037 | }
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 | return rc;
|
---|
1041 |
|
---|
1042 | # elif PGM_SHW_TYPE == PGM_TYPE_AMD64
|
---|
1043 | # error "Guest 32-bit mode and shadow AMD64 mode doesn't add up!"
|
---|
1044 | # endif
|
---|
1045 | return VINF_SUCCESS;
|
---|
1046 |
|
---|
1047 | #elif PGM_GST_TYPE == PGM_TYPE_PAE
|
---|
1048 | # if PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
1049 | //# error not implemented
|
---|
1050 | return VERR_INTERNAL_ERROR;
|
---|
1051 |
|
---|
1052 | # else /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
1053 | # error "Guest PAE mode, but not the shadow mode ; 32bit - maybe, but amd64 no."
|
---|
1054 | # endif /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
1055 |
|
---|
1056 | #elif PGM_GST_TYPE == PGM_TYPE_AMD64
|
---|
1057 | # if PGM_SHW_TYPE == PGM_TYPE_AMD64
|
---|
1058 | //# error not implemented
|
---|
1059 | return VERR_INTERNAL_ERROR;
|
---|
1060 |
|
---|
1061 | # else /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
1062 | # error "Guest AMD64 mode, but not the shadow mode - that can't be right!"
|
---|
1063 | # endif /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
1064 |
|
---|
1065 | #else /* guest real and protected mode */
|
---|
1066 | /* There's no such thing when paging is disabled. */
|
---|
1067 | return VINF_SUCCESS;
|
---|
1068 | #endif
|
---|
1069 | }
|
---|
1070 |
|
---|
1071 |
|
---|
1072 | #ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
1073 | /**
|
---|
1074 | * Update the tracking of shadowed pages.
|
---|
1075 | *
|
---|
1076 | * @param pVM The VM handle.
|
---|
1077 | * @param pShwPage The shadow page.
|
---|
1078 | * @param HCPhys The physical page we is being dereferenced.
|
---|
1079 | */
|
---|
1080 | DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackDeref)(PVM pVM, PPGMPOOLPAGE pShwPage, RTHCPHYS HCPhys)
|
---|
1081 | {
|
---|
1082 | # ifdef PGMPOOL_WITH_GCPHYS_TRACKING
|
---|
1083 | STAM_PROFILE_START(&pVM->pgm.s.StatTrackDeref, a);
|
---|
1084 | LogFlow(("SyncPageWorkerTrackDeref: Damn HCPhys=%VHp pShwPage->idx=%#x!!!\n", HCPhys, pShwPage->idx));
|
---|
1085 |
|
---|
1086 | /** @todo If this turns out to be a bottle neck (*very* likely) two things can be done:
|
---|
1087 | * 1. have a medium sized HCPhys -> GCPhys TLB (hash?)
|
---|
1088 | * 2. write protect all shadowed pages. I.e. implement caching.
|
---|
1089 | */
|
---|
1090 | /*
|
---|
1091 | * Find the guest address.
|
---|
1092 | */
|
---|
1093 | for (PPGMRAMRANGE pRam = pVM->pgm.s.CTXSUFF(pRamRanges);
|
---|
1094 | pRam;
|
---|
1095 | pRam = pRam->CTXSUFF(pNext))
|
---|
1096 | {
|
---|
1097 | unsigned iPage = pRam->cb >> PAGE_SHIFT;
|
---|
1098 | while (iPage-- > 0)
|
---|
1099 | {
|
---|
1100 | if (PGM_PAGE_GET_HCPHYS(&pRam->aPages[iPage]) == HCPhys)
|
---|
1101 | {
|
---|
1102 | PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
|
---|
1103 | pgmTrackDerefGCPhys(pPool, pShwPage, &pRam->aPages[iPage]);
|
---|
1104 | pShwPage->cPresent--;
|
---|
1105 | pPool->cPresent--;
|
---|
1106 | STAM_PROFILE_STOP(&pVM->pgm.s.StatTrackDeref, a);
|
---|
1107 | return;
|
---|
1108 | }
|
---|
1109 | }
|
---|
1110 | }
|
---|
1111 |
|
---|
1112 | for (;;)
|
---|
1113 | AssertReleaseMsgFailed(("HCPhys=%VHp wasn't found!\n", HCPhys));
|
---|
1114 | # else /* !PGMPOOL_WITH_GCPHYS_TRACKING */
|
---|
1115 | pShwPage->cPresent--;
|
---|
1116 | pVM->pgm.s.CTXSUFF(pPool)->cPresent--;
|
---|
1117 | # endif /* !PGMPOOL_WITH_GCPHYS_TRACKING */
|
---|
1118 | }
|
---|
1119 |
|
---|
1120 |
|
---|
1121 | /**
|
---|
1122 | * Update the tracking of shadowed pages.
|
---|
1123 | *
|
---|
1124 | * @param pVM The VM handle.
|
---|
1125 | * @param pShwPage The shadow page.
|
---|
1126 | * @param u16 The top 16-bit of the pPage->HCPhys.
|
---|
1127 | * @param pPage Pointer to the guest page. this will be modified.
|
---|
1128 | * @param iPTDst The index into the shadow table.
|
---|
1129 | */
|
---|
1130 | DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackAddref)(PVM pVM, PPGMPOOLPAGE pShwPage, uint16_t u16, PPGMPAGE pPage, const unsigned iPTDst)
|
---|
1131 | {
|
---|
1132 | # ifdef PGMPOOL_WITH_GCPHYS_TRACKING
|
---|
1133 | /*
|
---|
1134 | * We're making certain assumptions about the placement of cRef and idx.
|
---|
1135 | */
|
---|
1136 | Assert(MM_RAM_FLAGS_IDX_SHIFT == 48);
|
---|
1137 | Assert(MM_RAM_FLAGS_CREFS_SHIFT > MM_RAM_FLAGS_IDX_SHIFT);
|
---|
1138 |
|
---|
1139 | /*
|
---|
1140 | * Just deal with the simple first time here.
|
---|
1141 | */
|
---|
1142 | if (!u16)
|
---|
1143 | {
|
---|
1144 | STAM_COUNTER_INC(&pVM->pgm.s.StatTrackVirgin);
|
---|
1145 | u16 = (1 << (MM_RAM_FLAGS_CREFS_SHIFT - MM_RAM_FLAGS_IDX_SHIFT)) | pShwPage->idx;
|
---|
1146 | }
|
---|
1147 | else
|
---|
1148 | u16 = pgmPoolTrackPhysExtAddref(pVM, u16, pShwPage->idx);
|
---|
1149 |
|
---|
1150 | /* write back, trying to be clever... */
|
---|
1151 | Log2(("SyncPageWorkerTrackAddRef: u16=%#x pPage->HCPhys=%VHp->%VHp iPTDst=%#x\n",
|
---|
1152 | u16, pPage->HCPhys, (pPage->HCPhys & MM_RAM_FLAGS_NO_REFS_MASK) | ((uint64_t)u16 << MM_RAM_FLAGS_CREFS_SHIFT), iPTDst));
|
---|
1153 | *((uint16_t *)&pPage->HCPhys + 3) = u16; /** @todo PAGE FLAGS */
|
---|
1154 | # endif /* PGMPOOL_WITH_GCPHYS_TRACKING */
|
---|
1155 |
|
---|
1156 | /* update statistics. */
|
---|
1157 | pVM->pgm.s.CTXSUFF(pPool)->cPresent++;
|
---|
1158 | pShwPage->cPresent++;
|
---|
1159 | if (pShwPage->iFirstPresent > iPTDst)
|
---|
1160 | pShwPage->iFirstPresent = iPTDst;
|
---|
1161 | }
|
---|
1162 | #endif /* PGMPOOL_WITH_USER_TRACKING */
|
---|
1163 |
|
---|
1164 |
|
---|
1165 | /**
|
---|
1166 | * Creates a 4K shadow page for a guest page.
|
---|
1167 | *
|
---|
1168 | * For 4M pages the caller must convert the PDE4M to a PTE, this includes adjusting the
|
---|
1169 | * physical address. The PdeSrc argument only the flags are used. No page structured
|
---|
1170 | * will be mapped in this function.
|
---|
1171 | *
|
---|
1172 | * @param pVM VM handle.
|
---|
1173 | * @param pPteDst Destination page table entry.
|
---|
1174 | * @param PdeSrc Source page directory entry (i.e. Guest OS page directory entry).
|
---|
1175 | * Can safely assume that only the flags are being used.
|
---|
1176 | * @param PteSrc Source page table entry (i.e. Guest OS page table entry).
|
---|
1177 | * @param pShwPage Pointer to the shadow page.
|
---|
1178 | * @param iPTDst The index into the shadow table.
|
---|
1179 | *
|
---|
1180 | * @remark Not used for 2/4MB pages!
|
---|
1181 | */
|
---|
1182 | DECLINLINE(void) PGM_BTH_NAME(SyncPageWorker)(PVM pVM, PSHWPTE pPteDst, GSTPDE PdeSrc, VBOXPTE PteSrc, PPGMPOOLPAGE pShwPage, unsigned iPTDst)
|
---|
1183 | {
|
---|
1184 | if (PteSrc.n.u1Present)
|
---|
1185 | {
|
---|
1186 | /*
|
---|
1187 | * Find the ram range.
|
---|
1188 | */
|
---|
1189 | PPGMPAGE pPage;
|
---|
1190 | int rc = pgmPhysGetPageEx(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK, &pPage);
|
---|
1191 | if (VBOX_SUCCESS(rc))
|
---|
1192 | {
|
---|
1193 | /** @todo investiage PWT, PCD and PAT. */
|
---|
1194 | /*
|
---|
1195 | * Make page table entry.
|
---|
1196 | */
|
---|
1197 | const RTHCPHYS HCPhys = pPage->HCPhys; /** @todo FLAGS */
|
---|
1198 | SHWPTE PteDst;
|
---|
1199 | if (HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE))
|
---|
1200 | {
|
---|
1201 | /** @todo r=bird: Are we actually handling dirty and access bits for pages with access handlers correctly? No. */
|
---|
1202 | if (!(HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL)))
|
---|
1203 | PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PAT | X86_PTE_PCD | X86_PTE_PWT | X86_PTE_RW))
|
---|
1204 | | (HCPhys & X86_PTE_PAE_PG_MASK);
|
---|
1205 | else
|
---|
1206 | {
|
---|
1207 | LogFlow(("SyncPageWorker: monitored page (%VGp) -> mark not present\n", (HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL))));
|
---|
1208 | PteDst.u = 0;
|
---|
1209 | }
|
---|
1210 | /** @todo count these two kinds. */
|
---|
1211 | }
|
---|
1212 | else
|
---|
1213 | {
|
---|
1214 | #ifdef PGM_SYNC_DIRTY_BIT
|
---|
1215 | # ifdef PGM_SYNC_ACCESSED_BIT
|
---|
1216 | /*
|
---|
1217 | * If the page or page directory entry is not marked accessed,
|
---|
1218 | * we mark the page not present.
|
---|
1219 | */
|
---|
1220 | if (!PteSrc.n.u1Accessed || !PdeSrc.n.u1Accessed)
|
---|
1221 | {
|
---|
1222 | LogFlow(("SyncPageWorker: page and or page directory not accessed -> mark not present\n"));
|
---|
1223 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,AccessedPage));
|
---|
1224 | PteDst.u = 0;
|
---|
1225 | }
|
---|
1226 | else
|
---|
1227 | # endif
|
---|
1228 | /*
|
---|
1229 | * If the page is not flagged as dirty and is writable, then make it read-only, so we can set the dirty bit
|
---|
1230 | * when the page is modified.
|
---|
1231 | */
|
---|
1232 | if (!PteSrc.n.u1Dirty && (PdeSrc.n.u1Write & PteSrc.n.u1Write))
|
---|
1233 | {
|
---|
1234 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPage));
|
---|
1235 | PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PAT | X86_PTE_PCD | X86_PTE_PWT | X86_PTE_RW))
|
---|
1236 | | (HCPhys & X86_PTE_PAE_PG_MASK)
|
---|
1237 | | PGM_PTFLAGS_TRACK_DIRTY;
|
---|
1238 | }
|
---|
1239 | else
|
---|
1240 | {
|
---|
1241 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageSkipped));
|
---|
1242 | PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PAT | X86_PTE_PCD | X86_PTE_PWT))
|
---|
1243 | | (HCPhys & X86_PTE_PAE_PG_MASK);
|
---|
1244 | }
|
---|
1245 | #endif
|
---|
1246 | }
|
---|
1247 |
|
---|
1248 | #ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
1249 | /*
|
---|
1250 | * Keep user track up to date.
|
---|
1251 | */
|
---|
1252 | if (PteDst.n.u1Present)
|
---|
1253 | {
|
---|
1254 | if (!pPteDst->n.u1Present)
|
---|
1255 | PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
|
---|
1256 | else if ((pPteDst->u & SHW_PTE_PG_MASK) != (PteDst.u & SHW_PTE_PG_MASK))
|
---|
1257 | {
|
---|
1258 | Log2(("SyncPageWorker: deref! *pPteDst=%RX64 PteDst=%RX64\n", (uint64_t)pPteDst->u, (uint64_t)PteDst.u));
|
---|
1259 | PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
|
---|
1260 | PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
|
---|
1261 | }
|
---|
1262 | }
|
---|
1263 | else if (pPteDst->n.u1Present)
|
---|
1264 | {
|
---|
1265 | Log2(("SyncPageWorker: deref! *pPteDst=%RX64\n", (uint64_t)pPteDst->u));
|
---|
1266 | PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
|
---|
1267 | }
|
---|
1268 | #endif /* PGMPOOL_WITH_USER_TRACKING */
|
---|
1269 |
|
---|
1270 | /*
|
---|
1271 | * Update statistics and commit the entry.
|
---|
1272 | */
|
---|
1273 | if (!PteSrc.n.u1Global)
|
---|
1274 | pShwPage->fSeenNonGlobal = true;
|
---|
1275 | *pPteDst = PteDst;
|
---|
1276 | }
|
---|
1277 | /* else MMIO or invalid page, we must handle them manually in the #PF handler. */
|
---|
1278 | /** @todo count these. */
|
---|
1279 | }
|
---|
1280 | else
|
---|
1281 | {
|
---|
1282 | /*
|
---|
1283 | * Page not-present.
|
---|
1284 | */
|
---|
1285 | LogFlow(("SyncPageWorker: page not present in Pte\n"));
|
---|
1286 | #ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
1287 | /* Keep user track up to date. */
|
---|
1288 | if (pPteDst->n.u1Present)
|
---|
1289 | {
|
---|
1290 | Log2(("SyncPageWorker: deref! *pPteDst=%RX64\n", (uint64_t)pPteDst->u));
|
---|
1291 | PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
|
---|
1292 | }
|
---|
1293 | #endif /* PGMPOOL_WITH_USER_TRACKING */
|
---|
1294 | pPteDst->u = 0;
|
---|
1295 | /** @todo count these. */
|
---|
1296 | }
|
---|
1297 | }
|
---|
1298 |
|
---|
1299 |
|
---|
1300 | /**
|
---|
1301 | * Syncs a guest OS page.
|
---|
1302 | *
|
---|
1303 | * There are no conflicts at this point, neither is there any need for
|
---|
1304 | * page table allocations.
|
---|
1305 | *
|
---|
1306 | * @returns VBox status code.
|
---|
1307 | * @returns VINF_PGM_SYNCPAGE_MODIFIED_PDE if it modifies the PDE in any way.
|
---|
1308 | * @param pVM VM handle.
|
---|
1309 | * @param PdeSrc Page directory entry of the guest.
|
---|
1310 | * @param GCPtrPage Guest context page address.
|
---|
1311 | * @param cPages Number of pages to sync (PGM_SYNC_N_PAGES) (default=1).
|
---|
1312 | * @param uErr Fault error (X86_TRAP_PF_*).
|
---|
1313 | */
|
---|
1314 | PGM_BTH_DECL(int, SyncPage)(PVM pVM, GSTPDE PdeSrc, RTGCUINTPTR GCPtrPage, unsigned cPages, unsigned uErr)
|
---|
1315 | {
|
---|
1316 | LogFlow(("SyncPage: GCPtrPage=%VGv cPages=%d uErr=%#x\n", GCPtrPage, cPages, uErr));
|
---|
1317 |
|
---|
1318 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
1319 |
|
---|
1320 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
|
---|
1321 | # error "Invalid shadow mode for 32-bit guest mode!"
|
---|
1322 | # endif
|
---|
1323 |
|
---|
1324 | /*
|
---|
1325 | * Assert preconditions.
|
---|
1326 | */
|
---|
1327 | # if GC_ARCH_BITS != 32
|
---|
1328 | Assert(GCPtrPage < _4G); //???
|
---|
1329 | # endif
|
---|
1330 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCSyncPagePD[(GCPtrPage >> X86_PD_SHIFT) & GST_PD_MASK]);
|
---|
1331 | Assert(PdeSrc.n.u1Present);
|
---|
1332 | Assert(cPages);
|
---|
1333 |
|
---|
1334 | /*
|
---|
1335 | * Get the shadow PDE, find the shadow page table in the pool.
|
---|
1336 | */
|
---|
1337 | const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
|
---|
1338 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1339 | X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
|
---|
1340 | # else /* PAE */
|
---|
1341 | X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst];
|
---|
1342 | # endif
|
---|
1343 | Assert(PdeDst.n.u1Present);
|
---|
1344 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
|
---|
1345 |
|
---|
1346 | /*
|
---|
1347 | * Check that the page is present and that the shadow PDE isn't out of sync.
|
---|
1348 | */
|
---|
1349 | const bool fBigPage = PdeSrc.b.u1Size && (CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
|
---|
1350 | RTGCPHYS GCPhys;
|
---|
1351 | if (!fBigPage)
|
---|
1352 | {
|
---|
1353 | GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
|
---|
1354 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT
|
---|
1355 | GCPhys |= (iPDDst & 1) * (PAGE_SIZE/2);
|
---|
1356 | # endif
|
---|
1357 | }
|
---|
1358 | else
|
---|
1359 | {
|
---|
1360 | GCPhys = PdeSrc.u & GST_PDE4M_PG_MASK;
|
---|
1361 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT
|
---|
1362 | GCPhys |= GCPtrPage & X86_PAGE_2M_SIZE;
|
---|
1363 | # endif
|
---|
1364 | }
|
---|
1365 | if ( pShwPage->GCPhys == GCPhys
|
---|
1366 | && PdeSrc.n.u1Present
|
---|
1367 | && (PdeSrc.n.u1User == PdeDst.n.u1User)
|
---|
1368 | && (PdeSrc.n.u1Write == PdeDst.n.u1Write || !PdeDst.n.u1Write)
|
---|
1369 | )
|
---|
1370 | {
|
---|
1371 | # ifdef PGM_SYNC_ACCESSED_BIT
|
---|
1372 | /*
|
---|
1373 | * Check that the PDE is marked accessed already.
|
---|
1374 | * Since we set the accessed bit *before* getting here on a #PF, this
|
---|
1375 | * check is only meant for dealing with non-#PF'ing paths.
|
---|
1376 | */
|
---|
1377 | if (PdeSrc.n.u1Accessed)
|
---|
1378 | # endif
|
---|
1379 | {
|
---|
1380 | PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
1381 | if (!fBigPage)
|
---|
1382 | {
|
---|
1383 | /*
|
---|
1384 | * 4KB Page - Map the guest page table.
|
---|
1385 | */
|
---|
1386 | PVBOXPT pPTSrc;
|
---|
1387 | int rc = PGM_GCPHYS_2_PTR(pVM, PdeSrc.u & GST_PDE_PG_MASK, &pPTSrc);
|
---|
1388 | if (VBOX_SUCCESS(rc))
|
---|
1389 | {
|
---|
1390 | # ifdef PGM_SYNC_N_PAGES
|
---|
1391 | Assert(cPages == 1 || !(uErr & X86_TRAP_PF_P));
|
---|
1392 | if (cPages > 1 && !(uErr & X86_TRAP_PF_P))
|
---|
1393 | {
|
---|
1394 | /*
|
---|
1395 | * This code path is currently only taken when the caller is PGMTrap0eHandler
|
---|
1396 | * for non-present pages!
|
---|
1397 | *
|
---|
1398 | * We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
|
---|
1399 | * deal with locality.
|
---|
1400 | */
|
---|
1401 | unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
1402 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1403 | const unsigned offPTSrc = 0;
|
---|
1404 | # else
|
---|
1405 | const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
|
---|
1406 | # endif
|
---|
1407 | const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, ELEMENTS(pPTDst->a));
|
---|
1408 | if (iPTDst < PGM_SYNC_NR_PAGES / 2)
|
---|
1409 | iPTDst = 0;
|
---|
1410 | else
|
---|
1411 | iPTDst -= PGM_SYNC_NR_PAGES / 2;
|
---|
1412 | for (; iPTDst < iPTDstEnd; iPTDst++)
|
---|
1413 | {
|
---|
1414 | if (!pPTDst->a[iPTDst].n.u1Present)
|
---|
1415 | {
|
---|
1416 | VBOXPTE PteSrc = pPTSrc->a[offPTSrc + iPTDst];
|
---|
1417 | RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(GST_PT_MASK << GST_PT_SHIFT)) | ((offPTSrc + iPTDst) << PAGE_SHIFT);
|
---|
1418 | NOREF(GCPtrCurPage);
|
---|
1419 | #ifndef IN_RING0
|
---|
1420 | /*
|
---|
1421 | * Assuming kernel code will be marked as supervisor - and not as user level
|
---|
1422 | * and executed using a conforming code selector - And marked as readonly.
|
---|
1423 | * Also assume that if we're monitoring a page, it's of no interest to CSAM.
|
---|
1424 | */
|
---|
1425 | if ( ((PdeSrc.u & PteSrc.u) & (X86_PTE_RW | X86_PTE_US))
|
---|
1426 | || iPTDst == ((GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK) /* always sync GCPtrPage */
|
---|
1427 | || !CSAMDoesPageNeedScanning(pVM, (RTGCPTR)GCPtrCurPage)
|
---|
1428 | || pgmRamTestFlags(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK,
|
---|
1429 | MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)
|
---|
1430 | )
|
---|
1431 | #endif
|
---|
1432 | PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
|
---|
1433 | Log2(("SyncPage: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx%s\n",
|
---|
1434 | GCPtrCurPage, PteSrc.n.u1Present,
|
---|
1435 | PteSrc.n.u1Write & PdeSrc.n.u1Write,
|
---|
1436 | PteSrc.n.u1User & PdeSrc.n.u1User,
|
---|
1437 | (uint64_t)PteSrc.u,
|
---|
1438 | (uint64_t)pPTDst->a[iPTDst].u,
|
---|
1439 | pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
1440 | }
|
---|
1441 | }
|
---|
1442 | }
|
---|
1443 | else
|
---|
1444 | # endif /* PGM_SYNC_N_PAGES */
|
---|
1445 | {
|
---|
1446 | const unsigned iPTSrc = (GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK;
|
---|
1447 | VBOXPTE PteSrc = pPTSrc->a[iPTSrc];
|
---|
1448 | const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
1449 | PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
|
---|
1450 | Log2(("SyncPage: 4K %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s\n",
|
---|
1451 | GCPtrPage, PteSrc.n.u1Present,
|
---|
1452 | PteSrc.n.u1Write & PdeSrc.n.u1Write,
|
---|
1453 | PteSrc.n.u1User & PdeSrc.n.u1User,
|
---|
1454 | (uint64_t)PteSrc.u,
|
---|
1455 | pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
1456 | }
|
---|
1457 | }
|
---|
1458 | else /* MMIO or invalid page: emulated in #PF handler. */
|
---|
1459 | {
|
---|
1460 | LogFlow(("PGM_GCPHYS_2_PTR %VGp failed with %Vrc\n", GCPhys, rc));
|
---|
1461 | Assert(!pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK].n.u1Present);
|
---|
1462 | }
|
---|
1463 | }
|
---|
1464 | else
|
---|
1465 | {
|
---|
1466 | /*
|
---|
1467 | * 4/2MB page - lazy syncing shadow 4K pages.
|
---|
1468 | * (There are many causes of getting here, it's no longer only CSAM.)
|
---|
1469 | */
|
---|
1470 | /* Calculate the GC physical address of this 4KB shadow page. */
|
---|
1471 | RTGCPHYS GCPhys = (PdeSrc.u & X86_PDE4M_PAE_PG_MASK) | ((RTGCUINTPTR)GCPtrPage & GST_BIG_PAGE_OFFSET_MASK);
|
---|
1472 | /* Find ram range. */
|
---|
1473 | PPGMPAGE pPage;
|
---|
1474 | int rc = pgmPhysGetPageEx(&pVM->pgm.s, GCPhys, &pPage);
|
---|
1475 | if (VBOX_SUCCESS(rc))
|
---|
1476 | {
|
---|
1477 | /*
|
---|
1478 | * Make shadow PTE entry.
|
---|
1479 | */
|
---|
1480 | RTHCPHYS HCPhys = pPage->HCPhys; /** @todo PAGE FLAGS */
|
---|
1481 | SHWPTE PteDst;
|
---|
1482 | PteDst.u = (PdeSrc.u & ~(X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PAT | X86_PTE_PCD | X86_PTE_PWT))
|
---|
1483 | | (HCPhys & X86_PTE_PAE_PG_MASK);
|
---|
1484 | if (HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE))
|
---|
1485 | {
|
---|
1486 | if (!(HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL)))
|
---|
1487 | PteDst.n.u1Write = 0;
|
---|
1488 | else
|
---|
1489 | PteDst.u = 0;
|
---|
1490 | }
|
---|
1491 | const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
1492 | # ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
1493 | if (PteDst.n.u1Present && !pPTDst->a[iPTDst].n.u1Present)
|
---|
1494 | PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
|
---|
1495 | # endif
|
---|
1496 | pPTDst->a[iPTDst] = PteDst;
|
---|
1497 |
|
---|
1498 |
|
---|
1499 | # ifdef PGM_SYNC_DIRTY_BIT
|
---|
1500 | /*
|
---|
1501 | * If the page is not flagged as dirty and is writable, then make it read-only
|
---|
1502 | * at PD level, so we can set the dirty bit when the page is modified.
|
---|
1503 | *
|
---|
1504 | * ASSUMES that page access handlers are implemented on page table entry level.
|
---|
1505 | * Thus we will first catch the dirty access and set PDE.D and restart. If
|
---|
1506 | * there is an access handler, we'll trap again and let it work on the problem.
|
---|
1507 | */
|
---|
1508 | /** @todo r=bird: figure out why we need this here, SyncPT should've taken care of this already.
|
---|
1509 | * As for invlpg, it simply frees the whole shadow PT.
|
---|
1510 | * ...It's possibly because the guest clears it and the guest doesn't really tell us... */
|
---|
1511 | if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
|
---|
1512 | {
|
---|
1513 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
|
---|
1514 | PdeDst.u |= PGM_PDFLAGS_TRACK_DIRTY;
|
---|
1515 | PdeDst.n.u1Write = 0;
|
---|
1516 | }
|
---|
1517 | else
|
---|
1518 | {
|
---|
1519 | PdeDst.au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
|
---|
1520 | PdeDst.n.u1Write = PdeSrc.n.u1Write;
|
---|
1521 | }
|
---|
1522 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1523 | pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst] = PdeDst;
|
---|
1524 | # else /* PAE */
|
---|
1525 | pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst] = PdeDst;
|
---|
1526 | # endif
|
---|
1527 | # endif /* PGM_SYNC_DIRTY_BIT */
|
---|
1528 | Log2(("SyncPage: BIG %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} GCPhys=%VGp%s\n",
|
---|
1529 | GCPtrPage, PdeSrc.n.u1Present, PdeSrc.n.u1Write, PdeSrc.n.u1User, (uint64_t)PdeSrc.u, GCPhys,
|
---|
1530 | PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
1531 | }
|
---|
1532 | else
|
---|
1533 | LogFlow(("PGM_GCPHYS_2_PTR %VGp (big) failed with %Vrc\n", GCPhys, rc));
|
---|
1534 | }
|
---|
1535 | return VINF_SUCCESS;
|
---|
1536 | }
|
---|
1537 | # ifdef PGM_SYNC_ACCESSED_BIT
|
---|
1538 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPagePDNAs));
|
---|
1539 | #endif
|
---|
1540 | }
|
---|
1541 | else
|
---|
1542 | {
|
---|
1543 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPagePDOutOfSync));
|
---|
1544 | Log2(("SyncPage: Out-Of-Sync PDE at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
|
---|
1545 | GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
1546 | }
|
---|
1547 |
|
---|
1548 | /*
|
---|
1549 | * Mark the PDE not present. Restart the instruction and let #PF call SyncPT.
|
---|
1550 | * Yea, I'm lazy.
|
---|
1551 | */
|
---|
1552 | pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
|
---|
1553 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1554 | pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst].u = 0;
|
---|
1555 | # else /* PAE */
|
---|
1556 | pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst].u = 0;
|
---|
1557 | # endif
|
---|
1558 | PGM_INVL_GUEST_TLBS();
|
---|
1559 | return VINF_PGM_SYNCPAGE_MODIFIED_PDE;
|
---|
1560 |
|
---|
1561 | #elif PGM_GST_TYPE == PGM_TYPE_REAL || PGM_GST_TYPE == PGM_TYPE_PROT
|
---|
1562 |
|
---|
1563 | # ifdef PGM_SYNC_N_PAGES
|
---|
1564 | /*
|
---|
1565 | * Get the shadow PDE, find the shadow page table in the pool.
|
---|
1566 | */
|
---|
1567 | const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
|
---|
1568 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1569 | X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
|
---|
1570 | # else /* PAE */
|
---|
1571 | X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst];
|
---|
1572 | # endif
|
---|
1573 | Assert(PdeDst.n.u1Present);
|
---|
1574 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
|
---|
1575 | PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
1576 |
|
---|
1577 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1578 | const unsigned offPTSrc = 0;
|
---|
1579 | # else
|
---|
1580 | const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
|
---|
1581 | # endif
|
---|
1582 |
|
---|
1583 | Assert(cPages == 1 || !(uErr & X86_TRAP_PF_P));
|
---|
1584 | if (cPages > 1 && !(uErr & X86_TRAP_PF_P))
|
---|
1585 | {
|
---|
1586 | /*
|
---|
1587 | * This code path is currently only taken when the caller is PGMTrap0eHandler
|
---|
1588 | * for non-present pages!
|
---|
1589 | *
|
---|
1590 | * We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
|
---|
1591 | * deal with locality.
|
---|
1592 | */
|
---|
1593 | unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
1594 | const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, ELEMENTS(pPTDst->a));
|
---|
1595 | if (iPTDst < PGM_SYNC_NR_PAGES / 2)
|
---|
1596 | iPTDst = 0;
|
---|
1597 | else
|
---|
1598 | iPTDst -= PGM_SYNC_NR_PAGES / 2;
|
---|
1599 | for (; iPTDst < iPTDstEnd; iPTDst++)
|
---|
1600 | {
|
---|
1601 | if (!pPTDst->a[iPTDst].n.u1Present)
|
---|
1602 | {
|
---|
1603 | VBOXPTE PteSrc;
|
---|
1604 |
|
---|
1605 | RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(GST_PT_MASK << GST_PT_SHIFT)) | ((offPTSrc + iPTDst) << PAGE_SHIFT);
|
---|
1606 |
|
---|
1607 | /* Fake the page table entry */
|
---|
1608 | PteSrc.u = GCPtrCurPage;
|
---|
1609 | PteSrc.n.u1Present = 1;
|
---|
1610 | PteSrc.n.u1Dirty = 1;
|
---|
1611 | PteSrc.n.u1Accessed = 1;
|
---|
1612 | PteSrc.n.u1Write = 1;
|
---|
1613 | PteSrc.n.u1User = 1;
|
---|
1614 |
|
---|
1615 | PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
|
---|
1616 |
|
---|
1617 | Log2(("SyncPage: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx%s\n",
|
---|
1618 | GCPtrCurPage, PteSrc.n.u1Present,
|
---|
1619 | PteSrc.n.u1Write & PdeSrc.n.u1Write,
|
---|
1620 | PteSrc.n.u1User & PdeSrc.n.u1User,
|
---|
1621 | (uint64_t)PteSrc.u,
|
---|
1622 | (uint64_t)pPTDst->a[iPTDst].u,
|
---|
1623 | pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
1624 | }
|
---|
1625 | }
|
---|
1626 | }
|
---|
1627 | else
|
---|
1628 | # endif /* PGM_SYNC_N_PAGES */
|
---|
1629 | {
|
---|
1630 | VBOXPTE PteSrc;
|
---|
1631 | const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
1632 | RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(GST_PT_MASK << GST_PT_SHIFT)) | ((offPTSrc + iPTDst) << PAGE_SHIFT);
|
---|
1633 |
|
---|
1634 | /* Fake the page table entry */
|
---|
1635 | PteSrc.u = GCPtrCurPage;
|
---|
1636 | PteSrc.n.u1Present = 1;
|
---|
1637 | PteSrc.n.u1Dirty = 1;
|
---|
1638 | PteSrc.n.u1Accessed = 1;
|
---|
1639 | PteSrc.n.u1Write = 1;
|
---|
1640 | PteSrc.n.u1User = 1;
|
---|
1641 | PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
|
---|
1642 |
|
---|
1643 | Log2(("SyncPage: 4K %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s\n",
|
---|
1644 | GCPtrPage, PteSrc.n.u1Present,
|
---|
1645 | PteSrc.n.u1Write & PdeSrc.n.u1Write,
|
---|
1646 | PteSrc.n.u1User & PdeSrc.n.u1User,
|
---|
1647 | (uint64_t)PteSrc.u,
|
---|
1648 | pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
1649 | }
|
---|
1650 | return VINF_SUCCESS;
|
---|
1651 |
|
---|
1652 | #else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
1653 | AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
|
---|
1654 | return VERR_INTERNAL_ERROR;
|
---|
1655 | #endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
1656 | }
|
---|
1657 |
|
---|
1658 |
|
---|
1659 |
|
---|
1660 | #if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
1661 |
|
---|
1662 | # ifdef PGM_SYNC_DIRTY_BIT
|
---|
1663 |
|
---|
1664 | /**
|
---|
1665 | * Investigate page fault and handle write protection page faults caused by
|
---|
1666 | * dirty bit tracking.
|
---|
1667 | *
|
---|
1668 | * @returns VBox status code.
|
---|
1669 | * @param pVM VM handle.
|
---|
1670 | * @param uErr Page fault error code.
|
---|
1671 | * @param pPdeDst Shadow page directory entry.
|
---|
1672 | * @param pPdeSrc Guest page directory entry.
|
---|
1673 | * @param GCPtrPage Guest context page address.
|
---|
1674 | */
|
---|
1675 | PGM_BTH_DECL(int, CheckPageFault)(PVM pVM, uint32_t uErr, PSHWPDE pPdeDst, PGSTPDE pPdeSrc, RTGCUINTPTR GCPtrPage)
|
---|
1676 | {
|
---|
1677 | STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat, DirtyBitTracking), a);
|
---|
1678 | LogFlow(("CheckPageFault: GCPtrPage=%VGv uErr=%#x PdeSrc=%08x\n", GCPtrPage, uErr, pPdeSrc->u));
|
---|
1679 |
|
---|
1680 | /*
|
---|
1681 | * Real page fault?
|
---|
1682 | */
|
---|
1683 | if ( (uErr & X86_TRAP_PF_RSVD)
|
---|
1684 | || !pPdeSrc->n.u1Present
|
---|
1685 | #if PGM_GST_TYPE == PGM_TYPE_PAE
|
---|
1686 | || ((uErr & X86_TRAP_PF_ID) && pPdeSrc->n.u1NoExecute)
|
---|
1687 | #endif
|
---|
1688 | || ((uErr & X86_TRAP_PF_RW) && !pPdeSrc->n.u1Write)
|
---|
1689 | || ((uErr & X86_TRAP_PF_US) && !pPdeSrc->n.u1User) )
|
---|
1690 | {
|
---|
1691 | # ifdef IN_GC
|
---|
1692 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtyTrackRealPF);
|
---|
1693 | # endif
|
---|
1694 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat, DirtyBitTracking), a);
|
---|
1695 | LogFlow(("CheckPageFault: real page fault at %VGv (1)\n", GCPtrPage));
|
---|
1696 |
|
---|
1697 | if (pPdeSrc->n.u1Present)
|
---|
1698 | {
|
---|
1699 | /* Check the present bit as the shadow tables can cause different error codes by being out of sync.
|
---|
1700 | * See the 2nd case below as well.
|
---|
1701 | */
|
---|
1702 | if (pPdeSrc->b.u1Size && (CPUMGetGuestCR4(pVM) & X86_CR4_PSE))
|
---|
1703 | {
|
---|
1704 | TRPMSetErrorCode(pVM, uErr | X86_TRAP_PF_P); /* page-level protection violation */
|
---|
1705 | }
|
---|
1706 | else
|
---|
1707 | {
|
---|
1708 | /*
|
---|
1709 | * Map the guest page table.
|
---|
1710 | */
|
---|
1711 | PGSTPT pPTSrc;
|
---|
1712 | int rc = PGM_GCPHYS_2_PTR(pVM, pPdeSrc->u & GST_PDE_PG_MASK, &pPTSrc);
|
---|
1713 | if (VBOX_SUCCESS(rc))
|
---|
1714 | {
|
---|
1715 | PGSTPTE pPteSrc = &pPTSrc->a[(GCPtrPage >> PAGE_SHIFT) & GST_PT_MASK];
|
---|
1716 | const GSTPTE PteSrc = *pPteSrc;
|
---|
1717 | if (pPteSrc->n.u1Present)
|
---|
1718 | TRPMSetErrorCode(pVM, uErr | X86_TRAP_PF_P); /* page-level protection violation */
|
---|
1719 | }
|
---|
1720 | AssertRC(rc);
|
---|
1721 | }
|
---|
1722 | }
|
---|
1723 | return VINF_EM_RAW_GUEST_TRAP;
|
---|
1724 | }
|
---|
1725 |
|
---|
1726 | /*
|
---|
1727 | * First check the easy case where the page directory has been marked read-only to track
|
---|
1728 | * the dirty bit of an emulated BIG page
|
---|
1729 | */
|
---|
1730 | if (pPdeSrc->b.u1Size && (CPUMGetGuestCR4(pVM) & X86_CR4_PSE))
|
---|
1731 | {
|
---|
1732 | /* Mark guest page directory as accessed */
|
---|
1733 | pPdeSrc->b.u1Accessed = 1;
|
---|
1734 |
|
---|
1735 | /*
|
---|
1736 | * Only write protection page faults are relevant here.
|
---|
1737 | */
|
---|
1738 | if (uErr & X86_TRAP_PF_RW)
|
---|
1739 | {
|
---|
1740 | /* Mark guest page directory as dirty (BIG page only). */
|
---|
1741 | pPdeSrc->b.u1Dirty = 1;
|
---|
1742 |
|
---|
1743 | if (pPdeDst->n.u1Present && (pPdeDst->u & PGM_PDFLAGS_TRACK_DIRTY))
|
---|
1744 | {
|
---|
1745 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageTrap));
|
---|
1746 |
|
---|
1747 | Assert(pPdeSrc->b.u1Write);
|
---|
1748 |
|
---|
1749 | pPdeDst->n.u1Write = 1;
|
---|
1750 | pPdeDst->n.u1Accessed = 1;
|
---|
1751 | pPdeDst->au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
|
---|
1752 | PGM_INVL_BIG_PG(GCPtrPage);
|
---|
1753 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1754 | return VINF_PGM_HANDLED_DIRTY_BIT_FAULT;
|
---|
1755 | }
|
---|
1756 | }
|
---|
1757 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1758 | return VINF_PGM_NO_DIRTY_BIT_TRACKING;
|
---|
1759 | }
|
---|
1760 | /* else: 4KB page table */
|
---|
1761 |
|
---|
1762 | /*
|
---|
1763 | * Map the guest page table.
|
---|
1764 | */
|
---|
1765 | PGSTPT pPTSrc;
|
---|
1766 | int rc = PGM_GCPHYS_2_PTR(pVM, pPdeSrc->u & GST_PDE_PG_MASK, &pPTSrc);
|
---|
1767 | if (VBOX_SUCCESS(rc))
|
---|
1768 | {
|
---|
1769 | /*
|
---|
1770 | * Real page fault?
|
---|
1771 | */
|
---|
1772 | PGSTPTE pPteSrc = &pPTSrc->a[(GCPtrPage >> PAGE_SHIFT) & GST_PT_MASK];
|
---|
1773 | const GSTPTE PteSrc = *pPteSrc;
|
---|
1774 | if ( !PteSrc.n.u1Present
|
---|
1775 | #if PGM_GST_TYPE == PGM_TYPE_PAE
|
---|
1776 | || ((uErr & X86_TRAP_PF_ID) && !PteSrc.n.u1NoExecute)
|
---|
1777 | #endif
|
---|
1778 | || ((uErr & X86_TRAP_PF_RW) && !PteSrc.n.u1Write)
|
---|
1779 | || ((uErr & X86_TRAP_PF_US) && !PteSrc.n.u1User)
|
---|
1780 | )
|
---|
1781 | {
|
---|
1782 | # ifdef IN_GC
|
---|
1783 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtyTrackRealPF);
|
---|
1784 | # endif
|
---|
1785 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1786 | LogFlow(("CheckPageFault: real page fault at %VGv PteSrc.u=%08x (2)\n", GCPtrPage, PteSrc.u));
|
---|
1787 |
|
---|
1788 | /* Check the present bit as the shadow tables can cause different error codes by being out of sync.
|
---|
1789 | * See the 2nd case above as well.
|
---|
1790 | */
|
---|
1791 | if (pPdeSrc->n.u1Present && pPteSrc->n.u1Present)
|
---|
1792 | TRPMSetErrorCode(pVM, uErr | X86_TRAP_PF_P); /* page-level protection violation */
|
---|
1793 |
|
---|
1794 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1795 | return VINF_EM_RAW_GUEST_TRAP;
|
---|
1796 | }
|
---|
1797 | LogFlow(("CheckPageFault: page fault at %VGv PteSrc.u=%08x\n", GCPtrPage, PteSrc.u));
|
---|
1798 |
|
---|
1799 | /*
|
---|
1800 | * Set the accessed bits in the page directory and the page table.
|
---|
1801 | */
|
---|
1802 | pPdeSrc->n.u1Accessed = 1;
|
---|
1803 | pPteSrc->n.u1Accessed = 1;
|
---|
1804 |
|
---|
1805 | /*
|
---|
1806 | * Only write protection page faults are relevant here.
|
---|
1807 | */
|
---|
1808 | if (uErr & X86_TRAP_PF_RW)
|
---|
1809 | {
|
---|
1810 | /* Write access, so mark guest entry as dirty. */
|
---|
1811 | # if defined(IN_GC) && defined(VBOX_WITH_STATISTICS)
|
---|
1812 | if (!pPteSrc->n.u1Dirty)
|
---|
1813 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtiedPage);
|
---|
1814 | else
|
---|
1815 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageAlreadyDirty);
|
---|
1816 | # endif
|
---|
1817 | pPteSrc->n.u1Dirty = 1;
|
---|
1818 |
|
---|
1819 | if (pPdeDst->n.u1Present)
|
---|
1820 | {
|
---|
1821 | /* Bail out here as pgmPoolGetPageByHCPhys will return NULL and we'll crash below.
|
---|
1822 | * Our individual shadow handlers will provide more information and force a fatal exit.
|
---|
1823 | */
|
---|
1824 | if (MMHyperIsInsideArea(pVM, (RTGCPTR)GCPtrPage))
|
---|
1825 | {
|
---|
1826 | LogRel(("CheckPageFault: write to hypervisor region %VGv\n", GCPtrPage));
|
---|
1827 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1828 | return VINF_SUCCESS;
|
---|
1829 | }
|
---|
1830 |
|
---|
1831 | /*
|
---|
1832 | * Map shadow page table.
|
---|
1833 | */
|
---|
1834 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, pPdeDst->u & SHW_PDE_PG_MASK);
|
---|
1835 | if (pShwPage)
|
---|
1836 | {
|
---|
1837 | PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
1838 | PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
|
---|
1839 | if ( pPteDst->n.u1Present /** @todo Optimize accessed bit emulation? */
|
---|
1840 | && (pPteDst->u & PGM_PTFLAGS_TRACK_DIRTY))
|
---|
1841 | {
|
---|
1842 | LogFlow(("DIRTY page trap addr=%VGv\n", GCPtrPage));
|
---|
1843 | # ifdef VBOX_STRICT
|
---|
1844 | PPGMPAGE pPage = pgmPhysGetPage(&pVM->pgm.s, pPteSrc->u & GST_PTE_PG_MASK);
|
---|
1845 | if (pPage)
|
---|
1846 | AssertMsg(!(pPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)), /** @todo PAGE FLAGS */
|
---|
1847 | ("Unexpected dirty bit tracking on monitored page %VGv (phys %VGp)!!!!!!\n", GCPtrPage, pPteSrc->u & X86_PTE_PAE_PG_MASK));
|
---|
1848 | # endif
|
---|
1849 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageTrap));
|
---|
1850 |
|
---|
1851 | Assert(pPteSrc->n.u1Write);
|
---|
1852 |
|
---|
1853 | pPteDst->n.u1Write = 1;
|
---|
1854 | pPteDst->n.u1Dirty = 1;
|
---|
1855 | pPteDst->n.u1Accessed = 1;
|
---|
1856 | pPteDst->au32[0] &= ~PGM_PTFLAGS_TRACK_DIRTY;
|
---|
1857 | PGM_INVL_PG(GCPtrPage);
|
---|
1858 |
|
---|
1859 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1860 | return VINF_PGM_HANDLED_DIRTY_BIT_FAULT;
|
---|
1861 | }
|
---|
1862 | }
|
---|
1863 | else
|
---|
1864 | AssertMsgFailed(("pgmPoolGetPageByHCPhys %VGp failed!\n", pPdeDst->u & SHW_PDE_PG_MASK));
|
---|
1865 | }
|
---|
1866 | }
|
---|
1867 | /** @todo Optimize accessed bit emulation? */
|
---|
1868 | # ifdef VBOX_STRICT
|
---|
1869 | /*
|
---|
1870 | * Sanity check.
|
---|
1871 | */
|
---|
1872 | else if ( !pPteSrc->n.u1Dirty
|
---|
1873 | && (pPdeSrc->n.u1Write & pPteSrc->n.u1Write)
|
---|
1874 | && pPdeDst->n.u1Present)
|
---|
1875 | {
|
---|
1876 | PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, pPdeDst->u & SHW_PDE_PG_MASK);
|
---|
1877 | PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
1878 | PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
|
---|
1879 | if ( pPteDst->n.u1Present
|
---|
1880 | && pPteDst->n.u1Write)
|
---|
1881 | LogFlow(("Writable present page %VGv not marked for dirty bit tracking!!!\n", GCPtrPage));
|
---|
1882 | }
|
---|
1883 | # endif /* VBOX_STRICT */
|
---|
1884 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1885 | return VINF_PGM_NO_DIRTY_BIT_TRACKING;
|
---|
1886 | }
|
---|
1887 | AssertRC(rc);
|
---|
1888 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
|
---|
1889 | return rc;
|
---|
1890 | }
|
---|
1891 |
|
---|
1892 | # endif
|
---|
1893 |
|
---|
1894 | #endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
1895 |
|
---|
1896 |
|
---|
1897 | /**
|
---|
1898 | * Sync a shadow page table.
|
---|
1899 | *
|
---|
1900 | * The shadow page table is not present. This includes the case where
|
---|
1901 | * there is a conflict with a mapping.
|
---|
1902 | *
|
---|
1903 | * @returns VBox status code.
|
---|
1904 | * @param pVM VM handle.
|
---|
1905 | * @param iPD Page directory index.
|
---|
1906 | * @param pPDSrc Source page directory (i.e. Guest OS page directory).
|
---|
1907 | * Assume this is a temporary mapping.
|
---|
1908 | * @param GCPtrPage GC Pointer of the page that caused the fault
|
---|
1909 | */
|
---|
1910 | PGM_BTH_DECL(int, SyncPT)(PVM pVM, unsigned iPDSrc, PGSTPD pPDSrc, RTGCUINTPTR GCPtrPage)
|
---|
1911 | {
|
---|
1912 | STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
1913 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCSyncPtPD[iPDSrc]);
|
---|
1914 | LogFlow(("SyncPT: GCPtrPage=%VGv\n", GCPtrPage));
|
---|
1915 |
|
---|
1916 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
1917 |
|
---|
1918 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
|
---|
1919 | # error "Invalid shadow mode for 32-bit guest mode!"
|
---|
1920 | # endif
|
---|
1921 |
|
---|
1922 | /*
|
---|
1923 | * Validate input a little bit.
|
---|
1924 | */
|
---|
1925 | Assert(iPDSrc == (GCPtrPage >> GST_PD_SHIFT));
|
---|
1926 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
1927 | PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
|
---|
1928 | # else
|
---|
1929 | PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
|
---|
1930 | # endif
|
---|
1931 | const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
|
---|
1932 | PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
|
---|
1933 | SHWPDE PdeDst = *pPdeDst;
|
---|
1934 |
|
---|
1935 | /*
|
---|
1936 | * Check for conflicts.
|
---|
1937 | * GC: In case of a conflict we'll go to Ring-3 and do a full SyncCR3.
|
---|
1938 | * HC: Simply resolve the conflict.
|
---|
1939 | */
|
---|
1940 | if (PdeDst.u & PGM_PDFLAGS_MAPPING)
|
---|
1941 | {
|
---|
1942 | Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
|
---|
1943 | # ifndef IN_RING3
|
---|
1944 | Log(("SyncPT: Conflict at %VGv\n", GCPtrPage));
|
---|
1945 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
1946 | return VERR_ADDRESS_CONFLICT;
|
---|
1947 | # else
|
---|
1948 | PPGMMAPPING pMapping = pgmGetMapping(pVM, (RTGCPTR)GCPtrPage);
|
---|
1949 | Assert(pMapping);
|
---|
1950 | int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, iPDSrc);
|
---|
1951 | if (VBOX_FAILURE(rc))
|
---|
1952 | {
|
---|
1953 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
1954 | return rc;
|
---|
1955 | }
|
---|
1956 | PdeDst = *pPdeDst;
|
---|
1957 | # endif
|
---|
1958 | }
|
---|
1959 | Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
|
---|
1960 |
|
---|
1961 | /*
|
---|
1962 | * Sync page directory entry.
|
---|
1963 | */
|
---|
1964 | int rc = VINF_SUCCESS;
|
---|
1965 | GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
|
---|
1966 | if (PdeSrc.n.u1Present)
|
---|
1967 | {
|
---|
1968 | /*
|
---|
1969 | * Allocate & map the page table.
|
---|
1970 | */
|
---|
1971 | PSHWPT pPTDst;
|
---|
1972 | const bool fPageTable = !PdeSrc.b.u1Size || !(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
|
---|
1973 | PPGMPOOLPAGE pShwPage;
|
---|
1974 | RTGCPHYS GCPhys;
|
---|
1975 | if (fPageTable)
|
---|
1976 | {
|
---|
1977 | GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
|
---|
1978 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
1979 | GCPhys |= (iPDDst & 1) * (PAGE_SIZE / 2);
|
---|
1980 | # endif
|
---|
1981 | rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_PT, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
|
---|
1982 | }
|
---|
1983 | else
|
---|
1984 | {
|
---|
1985 | GCPhys = PdeSrc.u & GST_PDE4M_PG_MASK;
|
---|
1986 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
1987 | GCPhys |= GCPtrPage & RT_BIT(X86_PAGE_2M_SHIFT);
|
---|
1988 | # endif
|
---|
1989 | rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_BIG, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
|
---|
1990 | }
|
---|
1991 | if (rc == VINF_SUCCESS)
|
---|
1992 | pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
1993 | else if (rc == VINF_PGM_CACHED_PAGE)
|
---|
1994 | {
|
---|
1995 | /*
|
---|
1996 | * The PT was cached, just hook it up.
|
---|
1997 | */
|
---|
1998 | if (fPageTable)
|
---|
1999 | PdeDst.u = pShwPage->Core.Key
|
---|
2000 | | (PdeSrc.u & ~(X86_PDE_PAE_PG_MASK | X86_PDE_AVL_MASK | X86_PDE_PCD | X86_PDE_PWT | X86_PDE_PS | X86_PDE4M_G | X86_PDE4M_D));
|
---|
2001 | else
|
---|
2002 | {
|
---|
2003 | PdeDst.u = pShwPage->Core.Key
|
---|
2004 | | (PdeSrc.u & ~(X86_PDE_PAE_PG_MASK | X86_PDE_AVL_MASK | X86_PDE_PCD | X86_PDE_PWT | X86_PDE_PS | X86_PDE4M_G | X86_PDE4M_D));
|
---|
2005 | # ifdef PGM_SYNC_DIRTY_BIT /* (see explanation and assumtions further down.) */
|
---|
2006 | if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
|
---|
2007 | {
|
---|
2008 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
|
---|
2009 | PdeDst.u |= PGM_PDFLAGS_TRACK_DIRTY;
|
---|
2010 | PdeDst.b.u1Write = 0;
|
---|
2011 | }
|
---|
2012 | # endif
|
---|
2013 | }
|
---|
2014 | *pPdeDst = PdeDst;
|
---|
2015 | return VINF_SUCCESS;
|
---|
2016 | }
|
---|
2017 | else if (rc == VERR_PGM_POOL_FLUSHED)
|
---|
2018 | return VINF_PGM_SYNC_CR3;
|
---|
2019 | else
|
---|
2020 | AssertMsgFailedReturn(("rc=%Vrc\n", rc), VERR_INTERNAL_ERROR);
|
---|
2021 | PdeDst.u &= X86_PDE_AVL_MASK;
|
---|
2022 | PdeDst.u |= pShwPage->Core.Key;
|
---|
2023 |
|
---|
2024 | # ifdef PGM_SYNC_DIRTY_BIT
|
---|
2025 | /*
|
---|
2026 | * Page directory has been accessed (this is a fault situation, remember).
|
---|
2027 | */
|
---|
2028 | pPDSrc->a[iPDSrc].n.u1Accessed = 1;
|
---|
2029 | # endif
|
---|
2030 | if (fPageTable)
|
---|
2031 | {
|
---|
2032 | /*
|
---|
2033 | * Page table - 4KB.
|
---|
2034 | *
|
---|
2035 | * Sync all or just a few entries depending on PGM_SYNC_N_PAGES.
|
---|
2036 | */
|
---|
2037 | Log2(("SyncPT: 4K %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx}\n",
|
---|
2038 | GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u));
|
---|
2039 | PGSTPT pPTSrc;
|
---|
2040 | rc = PGM_GCPHYS_2_PTR(pVM, PdeSrc.u & GST_PDE_PG_MASK, &pPTSrc);
|
---|
2041 | if (VBOX_SUCCESS(rc))
|
---|
2042 | {
|
---|
2043 | /*
|
---|
2044 | * Start by syncing the page directory entry so CSAM's TLB trick works.
|
---|
2045 | */
|
---|
2046 | PdeDst.u = (PdeDst.u & (X86_PDE_PAE_PG_MASK | X86_PDE_AVL_MASK))
|
---|
2047 | | (PdeSrc.u & ~(X86_PDE_PAE_PG_MASK | X86_PDE_AVL_MASK | X86_PDE_PCD | X86_PDE_PWT | X86_PDE_PS | X86_PDE4M_G | X86_PDE4M_D));
|
---|
2048 | *pPdeDst = PdeDst;
|
---|
2049 |
|
---|
2050 | /*
|
---|
2051 | * Directory/page user or supervisor privilege: (same goes for read/write)
|
---|
2052 | *
|
---|
2053 | * Directory Page Combined
|
---|
2054 | * U/S U/S U/S
|
---|
2055 | * 0 0 0
|
---|
2056 | * 0 1 0
|
---|
2057 | * 1 0 0
|
---|
2058 | * 1 1 1
|
---|
2059 | *
|
---|
2060 | * Simple AND operation. Table listed for completeness.
|
---|
2061 | *
|
---|
2062 | */
|
---|
2063 | STAM_COUNTER_INC(CTXSUFF(&pVM->pgm.s.StatSynPT4k));
|
---|
2064 | # ifdef PGM_SYNC_N_PAGES
|
---|
2065 | unsigned iPTBase = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
|
---|
2066 | unsigned iPTDst = iPTBase;
|
---|
2067 | const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, ELEMENTS(pPTDst->a));
|
---|
2068 | if (iPTDst <= PGM_SYNC_NR_PAGES / 2)
|
---|
2069 | iPTDst = 0;
|
---|
2070 | else
|
---|
2071 | iPTDst -= PGM_SYNC_NR_PAGES / 2;
|
---|
2072 | # else /* !PGM_SYNC_N_PAGES */
|
---|
2073 | unsigned iPTDst = 0;
|
---|
2074 | const unsigned iPTDstEnd = ELEMENTS(pPTDst->a);
|
---|
2075 | # endif /* !PGM_SYNC_N_PAGES */
|
---|
2076 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2077 | const unsigned offPTSrc = 0;
|
---|
2078 | # else
|
---|
2079 | const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
|
---|
2080 | # endif
|
---|
2081 | for (; iPTDst < iPTDstEnd; iPTDst++)
|
---|
2082 | {
|
---|
2083 | const unsigned iPTSrc = iPTDst + offPTSrc;
|
---|
2084 | const GSTPTE PteSrc = pPTSrc->a[iPTSrc];
|
---|
2085 |
|
---|
2086 | if (PteSrc.n.u1Present) /* we've already cleared it above */
|
---|
2087 | {
|
---|
2088 | #ifndef IN_RING0
|
---|
2089 | /*
|
---|
2090 | * Assuming kernel code will be marked as supervisor - and not as user level
|
---|
2091 | * and executed using a conforming code selector - And marked as readonly.
|
---|
2092 | * Also assume that if we're monitoring a page, it's of no interest to CSAM.
|
---|
2093 | */
|
---|
2094 | if ( ((PdeSrc.u & pPTSrc->a[iPTSrc].u) & (X86_PTE_RW | X86_PTE_US))
|
---|
2095 | || !CSAMDoesPageNeedScanning(pVM, (RTGCPTR)((iPDSrc << GST_PD_SHIFT) | (iPTSrc << PAGE_SHIFT)))
|
---|
2096 | || pgmRamTestFlags(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK,
|
---|
2097 | MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)
|
---|
2098 | )
|
---|
2099 | #endif
|
---|
2100 | PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
|
---|
2101 | Log2(("SyncPT: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s dst.raw=%08llx iPTSrc=%x PdeSrc.u=%x physpte=%VGp\n",
|
---|
2102 | (RTGCPTR)((iPDSrc << GST_PD_SHIFT) | (iPTSrc << PAGE_SHIFT)),
|
---|
2103 | PteSrc.n.u1Present,
|
---|
2104 | PteSrc.n.u1Write & PdeSrc.n.u1Write,
|
---|
2105 | PteSrc.n.u1User & PdeSrc.n.u1User,
|
---|
2106 | (uint64_t)PteSrc.u,
|
---|
2107 | pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : "", pPTDst->a[iPTDst].u, iPTSrc, PdeSrc.au32[0],
|
---|
2108 | (PdeSrc.u & GST_PDE_PG_MASK) + iPTSrc*sizeof(PteSrc)));
|
---|
2109 | }
|
---|
2110 | } /* for PTEs */
|
---|
2111 | }
|
---|
2112 | }
|
---|
2113 | else
|
---|
2114 | {
|
---|
2115 | /*
|
---|
2116 | * Big page - 2/4MB.
|
---|
2117 | *
|
---|
2118 | * We'll walk the ram range list in parallel and optimize lookups.
|
---|
2119 | * We will only sync on shadow page table at a time.
|
---|
2120 | */
|
---|
2121 | STAM_COUNTER_INC(CTXSUFF(&pVM->pgm.s.StatSynPT4M));
|
---|
2122 |
|
---|
2123 | /**
|
---|
2124 | * @todo It might be more efficient to sync only a part of the 4MB page (similar to what we do for 4kb PDs).
|
---|
2125 | */
|
---|
2126 |
|
---|
2127 | /*
|
---|
2128 | * Start by syncing the page directory entry.
|
---|
2129 | */
|
---|
2130 | PdeDst.u = (PdeDst.u & (X86_PDE_PAE_PG_MASK | (X86_PDE_AVL_MASK & ~PGM_PDFLAGS_TRACK_DIRTY)))
|
---|
2131 | | (PdeSrc.u & ~(X86_PDE_PAE_PG_MASK | X86_PDE_AVL_MASK | X86_PDE_PCD | X86_PDE_PWT | X86_PDE_PS | X86_PDE4M_G | X86_PDE4M_D));
|
---|
2132 |
|
---|
2133 | # ifdef PGM_SYNC_DIRTY_BIT
|
---|
2134 | /*
|
---|
2135 | * If the page is not flagged as dirty and is writable, then make it read-only
|
---|
2136 | * at PD level, so we can set the dirty bit when the page is modified.
|
---|
2137 | *
|
---|
2138 | * ASSUMES that page access handlers are implemented on page table entry level.
|
---|
2139 | * Thus we will first catch the dirty access and set PDE.D and restart. If
|
---|
2140 | * there is an access handler, we'll trap again and let it work on the problem.
|
---|
2141 | */
|
---|
2142 | /** @todo move the above stuff to a section in the PGM documentation. */
|
---|
2143 | Assert(!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY));
|
---|
2144 | if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
|
---|
2145 | {
|
---|
2146 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
|
---|
2147 | PdeDst.u |= PGM_PDFLAGS_TRACK_DIRTY;
|
---|
2148 | PdeDst.b.u1Write = 0;
|
---|
2149 | }
|
---|
2150 | # endif /* PGM_SYNC_DIRTY_BIT */
|
---|
2151 | *pPdeDst = PdeDst;
|
---|
2152 |
|
---|
2153 | /*
|
---|
2154 | * Fill the shadow page table.
|
---|
2155 | */
|
---|
2156 | /* Get address and flags from the source PDE. */
|
---|
2157 | SHWPTE PteDstBase;
|
---|
2158 | PteDstBase.u = PdeSrc.u & ~(X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PAT | X86_PTE_PCD | X86_PTE_PWT);
|
---|
2159 |
|
---|
2160 | /* Loop thru the entries in the shadow PT. */
|
---|
2161 | const RTGCUINTPTR GCPtr = (GCPtrPage >> SHW_PD_SHIFT) << SHW_PD_SHIFT; NOREF(GCPtr);
|
---|
2162 | Log2(("SyncPT: BIG %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} Shw=%VGv GCPhys=%VGp %s\n",
|
---|
2163 | GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u, GCPtr,
|
---|
2164 | GCPhys, PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
2165 | PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
|
---|
2166 | unsigned iPTDst = 0;
|
---|
2167 | while (iPTDst < ELEMENTS(pPTDst->a))
|
---|
2168 | {
|
---|
2169 | /* Advance ram range list. */
|
---|
2170 | while (pRam && GCPhys > pRam->GCPhysLast)
|
---|
2171 | pRam = CTXSUFF(pRam->pNext);
|
---|
2172 | if (pRam && GCPhys >= pRam->GCPhys)
|
---|
2173 | {
|
---|
2174 | unsigned iHCPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
|
---|
2175 | do
|
---|
2176 | {
|
---|
2177 | /* Make shadow PTE. */
|
---|
2178 | PPGMPAGE pPage = &pRam->aPages[iHCPage];
|
---|
2179 | SHWPTE PteDst;
|
---|
2180 |
|
---|
2181 | /* Make sure the RAM has already been allocated. */
|
---|
2182 | if (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC) /** @todo PAGE FLAGS */
|
---|
2183 | {
|
---|
2184 | if (RT_UNLIKELY(!PGM_PAGE_GET_HCPHYS(pPage)))
|
---|
2185 | {
|
---|
2186 | # ifdef IN_RING3
|
---|
2187 | int rc = pgmr3PhysGrowRange(pVM, GCPhys);
|
---|
2188 | # else
|
---|
2189 | int rc = CTXALLMID(VMM, CallHost)(pVM, VMMCALLHOST_PGM_RAM_GROW_RANGE, GCPhys);
|
---|
2190 | # endif
|
---|
2191 | if (rc != VINF_SUCCESS)
|
---|
2192 | return rc;
|
---|
2193 | }
|
---|
2194 | }
|
---|
2195 |
|
---|
2196 | if (pPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)) /** @todo PAGE FLAGS */
|
---|
2197 | {
|
---|
2198 | if (!(pPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL))) /** @todo PAGE FLAGS */
|
---|
2199 | {
|
---|
2200 | PteDst.u = PGM_PAGE_GET_HCPHYS(pPage) | PteDstBase.u;
|
---|
2201 | PteDst.n.u1Write = 0;
|
---|
2202 | }
|
---|
2203 | else
|
---|
2204 | PteDst.u = 0;
|
---|
2205 | }
|
---|
2206 | # ifndef IN_RING0
|
---|
2207 | /*
|
---|
2208 | * Assuming kernel code will be marked as supervisor and not as user level and executed
|
---|
2209 | * using a conforming code selector. Don't check for readonly, as that implies the whole
|
---|
2210 | * 4MB can be code or readonly data. Linux enables write access for its large pages.
|
---|
2211 | */
|
---|
2212 | else if ( !PdeSrc.n.u1User
|
---|
2213 | && CSAMDoesPageNeedScanning(pVM, (RTGCPTR)(GCPtr | (iPTDst << SHW_PT_SHIFT))))
|
---|
2214 | PteDst.u = 0;
|
---|
2215 | # endif
|
---|
2216 | else
|
---|
2217 | PteDst.u = PGM_PAGE_GET_HCPHYS(pPage) | PteDstBase.u;
|
---|
2218 | # ifdef PGMPOOL_WITH_USER_TRACKING
|
---|
2219 | if (PteDst.n.u1Present)
|
---|
2220 | PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, pPage->HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst); /** @todo PAGE FLAGS */
|
---|
2221 | # endif
|
---|
2222 | /* commit it */
|
---|
2223 | pPTDst->a[iPTDst] = PteDst;
|
---|
2224 | Log4(("SyncPT: BIG %VGv PteDst:{P=%d RW=%d U=%d raw=%08llx}%s\n",
|
---|
2225 | (RTGCPTR)(GCPtr | (iPTDst << SHW_PT_SHIFT)), PteDst.n.u1Present, PteDst.n.u1Write, PteDst.n.u1User, (uint64_t)PteDst.u,
|
---|
2226 | PteDst.u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
|
---|
2227 |
|
---|
2228 | /* advance */
|
---|
2229 | GCPhys += PAGE_SIZE;
|
---|
2230 | iHCPage++;
|
---|
2231 | iPTDst++;
|
---|
2232 | } while ( iPTDst < ELEMENTS(pPTDst->a)
|
---|
2233 | && GCPhys <= pRam->GCPhysLast);
|
---|
2234 | }
|
---|
2235 | else if (pRam)
|
---|
2236 | {
|
---|
2237 | Log(("Invalid pages at %VGp\n", GCPhys));
|
---|
2238 | do
|
---|
2239 | {
|
---|
2240 | pPTDst->a[iPTDst].u = 0; /* MMIO or invalid page, we must handle them manually. */
|
---|
2241 | GCPhys += PAGE_SIZE;
|
---|
2242 | iPTDst++;
|
---|
2243 | } while ( iPTDst < ELEMENTS(pPTDst->a)
|
---|
2244 | && GCPhys < pRam->GCPhys);
|
---|
2245 | }
|
---|
2246 | else
|
---|
2247 | {
|
---|
2248 | Log(("Invalid pages at %VGp (2)\n", GCPhys));
|
---|
2249 | for ( ; iPTDst < ELEMENTS(pPTDst->a); iPTDst++)
|
---|
2250 | pPTDst->a[iPTDst].u = 0; /* MMIO or invalid page, we must handle them manually. */
|
---|
2251 | }
|
---|
2252 | } /* while more PTEs */
|
---|
2253 | } /* 4KB / 4MB */
|
---|
2254 | }
|
---|
2255 | else
|
---|
2256 | AssertRelease(!PdeDst.n.u1Present);
|
---|
2257 |
|
---|
2258 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
2259 | # ifdef IN_GC
|
---|
2260 | if (VBOX_FAILURE(rc))
|
---|
2261 | STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPTFailed));
|
---|
2262 | # endif
|
---|
2263 | return rc;
|
---|
2264 |
|
---|
2265 | #elif PGM_GST_TYPE == PGM_TYPE_REAL || PGM_GST_TYPE == PGM_TYPE_PROT
|
---|
2266 |
|
---|
2267 | int rc = VINF_SUCCESS;
|
---|
2268 |
|
---|
2269 | /*
|
---|
2270 | * Validate input a little bit.
|
---|
2271 | */
|
---|
2272 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2273 | PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
|
---|
2274 | # else
|
---|
2275 | PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
|
---|
2276 | # endif
|
---|
2277 | const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
|
---|
2278 | PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
|
---|
2279 | SHWPDE PdeDst = *pPdeDst;
|
---|
2280 |
|
---|
2281 | Assert(!(PdeDst.u & PGM_PDFLAGS_MAPPING));
|
---|
2282 | Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
|
---|
2283 |
|
---|
2284 | GSTPDE PdeSrc;
|
---|
2285 | PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
|
---|
2286 | PdeSrc.n.u1Present = 1;
|
---|
2287 | PdeSrc.n.u1Write = 1;
|
---|
2288 | PdeSrc.n.u1Accessed = 1;
|
---|
2289 | PdeSrc.n.u1User = 1;
|
---|
2290 |
|
---|
2291 | /*
|
---|
2292 | * Allocate & map the page table.
|
---|
2293 | */
|
---|
2294 | PSHWPT pPTDst;
|
---|
2295 | PPGMPOOLPAGE pShwPage;
|
---|
2296 | RTGCPHYS GCPhys;
|
---|
2297 |
|
---|
2298 | /* Virtual address = physical address */
|
---|
2299 | GCPhys = GCPtrPage & X86_PAGE_4K_BASE_MASK_32;
|
---|
2300 | rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_PT, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
|
---|
2301 |
|
---|
2302 | if ( rc == VINF_SUCCESS
|
---|
2303 | || rc == VINF_PGM_CACHED_PAGE)
|
---|
2304 | pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
|
---|
2305 | else
|
---|
2306 | AssertMsgFailedReturn(("rc=%Vrc\n", rc), VERR_INTERNAL_ERROR);
|
---|
2307 |
|
---|
2308 | PdeDst.u &= X86_PDE_AVL_MASK;
|
---|
2309 | PdeDst.u |= pShwPage->Core.Key;
|
---|
2310 | PdeDst.n.u1Present = 1;
|
---|
2311 | *pPdeDst = PdeDst;
|
---|
2312 |
|
---|
2313 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)GCPtrPage, PGM_SYNC_NR_PAGES, 0 /* page not present */);
|
---|
2314 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
2315 | return rc;
|
---|
2316 |
|
---|
2317 | #else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2318 |
|
---|
2319 | AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
|
---|
2320 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
|
---|
2321 | return VERR_INTERNAL_ERROR;
|
---|
2322 | #endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2323 | }
|
---|
2324 |
|
---|
2325 |
|
---|
2326 |
|
---|
2327 | /**
|
---|
2328 | * Prefetch a page/set of pages.
|
---|
2329 | *
|
---|
2330 | * Typically used to sync commonly used pages before entering raw mode
|
---|
2331 | * after a CR3 reload.
|
---|
2332 | *
|
---|
2333 | * @returns VBox status code.
|
---|
2334 | * @param pVM VM handle.
|
---|
2335 | * @param GCPtrPage Page to invalidate.
|
---|
2336 | */
|
---|
2337 | PGM_BTH_DECL(int, PrefetchPage)(PVM pVM, RTGCUINTPTR GCPtrPage)
|
---|
2338 | {
|
---|
2339 | #if (PGM_GST_TYPE == PGM_TYPE_32BIT || PGM_GST_TYPE == PGM_TYPE_REAL || PGM_GST_TYPE == PGM_TYPE_PROT) && PGM_SHW_TYPE != PGM_TYPE_AMD64
|
---|
2340 |
|
---|
2341 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
|
---|
2342 | # error "Invalid shadow mode for 32-bit guest mode!"
|
---|
2343 | # endif
|
---|
2344 |
|
---|
2345 | /*
|
---|
2346 | * Check that all Guest levels thru the PDE are present, getting the
|
---|
2347 | * PD and PDE in the processes.
|
---|
2348 | */
|
---|
2349 | int rc = VINF_SUCCESS;
|
---|
2350 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
2351 | # if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2352 | const unsigned iPDSrc = (RTGCUINTPTR)GCPtrPage >> GST_PD_SHIFT;
|
---|
2353 | PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
|
---|
2354 | # else /* PAE */
|
---|
2355 | unsigned iPDSrc
|
---|
2356 | PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
|
---|
2357 | # endif
|
---|
2358 | # else
|
---|
2359 | PGSTPD pPDSrc = NULL;
|
---|
2360 | const unsigned iPDSrc = 0;
|
---|
2361 | # endif
|
---|
2362 |
|
---|
2363 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
2364 | const GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
|
---|
2365 | # else
|
---|
2366 | GSTPDE PdeSrc;
|
---|
2367 | PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
|
---|
2368 | PdeSrc.n.u1Present = 1;
|
---|
2369 | PdeSrc.n.u1Write = 1;
|
---|
2370 | PdeSrc.n.u1Accessed = 1;
|
---|
2371 | PdeSrc.n.u1User = 1;
|
---|
2372 | # endif
|
---|
2373 |
|
---|
2374 | # ifdef PGM_SYNC_ACCESSED_BIT
|
---|
2375 | if (PdeSrc.n.u1Present && PdeSrc.n.u1Accessed)
|
---|
2376 | # else
|
---|
2377 | if (PdeSrc.n.u1Present)
|
---|
2378 | # endif
|
---|
2379 | {
|
---|
2380 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2381 | const X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[GCPtrPage >> SHW_PD_SHIFT];
|
---|
2382 | # else
|
---|
2383 | const X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[GCPtrPage >> SHW_PD_SHIFT];
|
---|
2384 | # endif
|
---|
2385 | if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
|
---|
2386 | {
|
---|
2387 | if (!PdeDst.n.u1Present)
|
---|
2388 | /** r=bird: This guy will set the A bit on the PDE, probably harmless. */
|
---|
2389 | rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
|
---|
2390 | else
|
---|
2391 | {
|
---|
2392 | /** @note We used to sync PGM_SYNC_NR_PAGES pages, which triggered assertions in CSAM, because
|
---|
2393 | * R/W attributes of nearby pages were reset. Not sure how that could happen. Anyway, it
|
---|
2394 | * makes no sense to prefetch more than one page.
|
---|
2395 | */
|
---|
2396 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
|
---|
2397 | if (VBOX_SUCCESS(rc))
|
---|
2398 | rc = VINF_SUCCESS;
|
---|
2399 | }
|
---|
2400 | }
|
---|
2401 | }
|
---|
2402 | return rc;
|
---|
2403 |
|
---|
2404 | #else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2405 |
|
---|
2406 | AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_SHW_TYPE, PGM_GST_TYPE));
|
---|
2407 | return VERR_INTERNAL_ERROR;
|
---|
2408 | #endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2409 | }
|
---|
2410 |
|
---|
2411 |
|
---|
2412 |
|
---|
2413 |
|
---|
2414 | /**
|
---|
2415 | * Syncs a page during a PGMVerifyAccess() call.
|
---|
2416 | *
|
---|
2417 | * @returns VBox status code (informational included).
|
---|
2418 | * @param GCPtrPage The address of the page to sync.
|
---|
2419 | * @param fPage The effective guest page flags.
|
---|
2420 | * @param uErr The trap error code.
|
---|
2421 | */
|
---|
2422 | PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVM pVM, RTGCUINTPTR GCPtrPage, unsigned fPage, unsigned uErr)
|
---|
2423 | {
|
---|
2424 | LogFlow(("VerifyAccessSyncPage: GCPtrPage=%VGv fPage=%#x uErr=%#x\n", GCPtrPage, fPage, uErr));
|
---|
2425 |
|
---|
2426 | #if (PGM_GST_TYPE == PGM_TYPE_32BIT || PGM_GST_TYPE == PGM_TYPE_REAL || PGM_GST_TYPE == PGM_TYPE_PROT || PGM_GST_TYPE == PGM_TYPE_PAE) && PGM_SHW_TYPE != PGM_TYPE_AMD64
|
---|
2427 |
|
---|
2428 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
|
---|
2429 | # error "Invalid shadow mode for 32-bit guest mode!"
|
---|
2430 | # endif
|
---|
2431 |
|
---|
2432 | #ifndef IN_RING0
|
---|
2433 | if (!(fPage & X86_PTE_US))
|
---|
2434 | {
|
---|
2435 | /*
|
---|
2436 | * Mark this page as safe.
|
---|
2437 | */
|
---|
2438 | /** @todo not correct for pages that contain both code and data!! */
|
---|
2439 | Log(("CSAMMarkPage %VGv; scanned=%d\n", GCPtrPage, true));
|
---|
2440 | CSAMMarkPage(pVM, (RTGCPTR)GCPtrPage, true);
|
---|
2441 | }
|
---|
2442 | #endif
|
---|
2443 | /*
|
---|
2444 | * Get guest PD and index.
|
---|
2445 | */
|
---|
2446 |
|
---|
2447 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
2448 | # if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2449 | const unsigned iPDSrc = (RTGCUINTPTR)GCPtrPage >> GST_PD_SHIFT;
|
---|
2450 | PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
|
---|
2451 | # else /* PAE */
|
---|
2452 | unsigned iPDSrc;
|
---|
2453 | PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
|
---|
2454 | # endif
|
---|
2455 | # else
|
---|
2456 | PGSTPD pPDSrc = NULL;
|
---|
2457 | const unsigned iPDSrc = 0;
|
---|
2458 | # endif
|
---|
2459 | int rc = VINF_SUCCESS;
|
---|
2460 |
|
---|
2461 | /*
|
---|
2462 | * First check if the shadow pd is present.
|
---|
2463 | */
|
---|
2464 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2465 | PX86PDE pPdeDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[GCPtrPage >> SHW_PD_SHIFT];
|
---|
2466 | # else
|
---|
2467 | PX86PDEPAE pPdeDst = &pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[GCPtrPage >> SHW_PD_SHIFT];
|
---|
2468 | # endif
|
---|
2469 | if (!pPdeDst->n.u1Present)
|
---|
2470 | {
|
---|
2471 | rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
|
---|
2472 | AssertRC(rc);
|
---|
2473 | if (rc != VINF_SUCCESS)
|
---|
2474 | return rc;
|
---|
2475 | }
|
---|
2476 |
|
---|
2477 | # if PGM_WITH_PAGING(PGM_GST_TYPE)
|
---|
2478 | /* Check for dirty bit fault */
|
---|
2479 | rc = PGM_BTH_NAME(CheckPageFault)(pVM, uErr, pPdeDst, &pPDSrc->a[iPDSrc], GCPtrPage);
|
---|
2480 | if (rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT)
|
---|
2481 | Log(("PGMVerifyAccess: success (dirty)\n"));
|
---|
2482 | else
|
---|
2483 | {
|
---|
2484 | GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
|
---|
2485 | #else
|
---|
2486 | {
|
---|
2487 | GSTPDE PdeSrc;
|
---|
2488 | PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
|
---|
2489 | PdeSrc.n.u1Present = 1;
|
---|
2490 | PdeSrc.n.u1Write = 1;
|
---|
2491 | PdeSrc.n.u1Accessed = 1;
|
---|
2492 | PdeSrc.n.u1User = 1;
|
---|
2493 |
|
---|
2494 | #endif /* PGM_WITH_PAGING(PGM_GST_TYPE) */
|
---|
2495 | Assert(rc != VINF_EM_RAW_GUEST_TRAP);
|
---|
2496 | if (uErr & X86_TRAP_PF_US)
|
---|
2497 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
|
---|
2498 | else /* supervisor */
|
---|
2499 | STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
|
---|
2500 |
|
---|
2501 | rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
|
---|
2502 | if (VBOX_SUCCESS(rc))
|
---|
2503 | {
|
---|
2504 | /* Page was successfully synced */
|
---|
2505 | Log2(("PGMVerifyAccess: success (sync)\n"));
|
---|
2506 | rc = VINF_SUCCESS;
|
---|
2507 | }
|
---|
2508 | else
|
---|
2509 | {
|
---|
2510 | Log(("PGMVerifyAccess: access violation for %VGv rc=%d\n", GCPtrPage, rc));
|
---|
2511 | return VINF_EM_RAW_GUEST_TRAP;
|
---|
2512 | }
|
---|
2513 | }
|
---|
2514 | return rc;
|
---|
2515 |
|
---|
2516 | #else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2517 |
|
---|
2518 | AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
|
---|
2519 | return VERR_INTERNAL_ERROR;
|
---|
2520 | #endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
|
---|
2521 | }
|
---|
2522 |
|
---|
2523 |
|
---|
2524 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2525 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
2526 | /**
|
---|
2527 | * Figures out which kind of shadow page this guest PDE warrants.
|
---|
2528 | *
|
---|
2529 | * @returns Shadow page kind.
|
---|
2530 | * @param pPdeSrc The guest PDE in question.
|
---|
2531 | * @param cr4 The current guest cr4 value.
|
---|
2532 | */
|
---|
2533 | DECLINLINE(PGMPOOLKIND) PGM_BTH_NAME(CalcPageKind)(const GSTPDE *pPdeSrc, uint32_t cr4)
|
---|
2534 | {
|
---|
2535 | if (!pPdeSrc->n.u1Size || !(cr4 & X86_CR4_PSE))
|
---|
2536 | return BTH_PGMPOOLKIND_PT_FOR_PT;
|
---|
2537 | //switch (pPdeSrc->u & (X86_PDE4M_RW | X86_PDE4M_US /*| X86_PDE4M_PAE_NX*/))
|
---|
2538 | //{
|
---|
2539 | // case 0:
|
---|
2540 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_RO;
|
---|
2541 | // case X86_PDE4M_RW:
|
---|
2542 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_RW;
|
---|
2543 | // case X86_PDE4M_US:
|
---|
2544 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_US;
|
---|
2545 | // case X86_PDE4M_RW | X86_PDE4M_US:
|
---|
2546 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_US;
|
---|
2547 | # if 0
|
---|
2548 | // case X86_PDE4M_PAE_NX:
|
---|
2549 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_NX;
|
---|
2550 | // case X86_PDE4M_RW | X86_PDE4M_PAE_NX:
|
---|
2551 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_NX;
|
---|
2552 | // case X86_PDE4M_US | X86_PDE4M_PAE_NX:
|
---|
2553 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_US_NX;
|
---|
2554 | // case X86_PDE4M_RW | X86_PDE4M_US | X86_PDE4M_PAE_NX:
|
---|
2555 | // return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_US_NX;
|
---|
2556 | # endif
|
---|
2557 | return BTH_PGMPOOLKIND_PT_FOR_BIG;
|
---|
2558 | //}
|
---|
2559 | }
|
---|
2560 | # endif
|
---|
2561 | #endif
|
---|
2562 |
|
---|
2563 | #undef MY_STAM_COUNTER_INC
|
---|
2564 | #define MY_STAM_COUNTER_INC(a) do { } while (0)
|
---|
2565 |
|
---|
2566 |
|
---|
2567 | /**
|
---|
2568 | * Syncs the paging hierarchy starting at CR3.
|
---|
2569 | *
|
---|
2570 | * @returns VBox status code, no specials.
|
---|
2571 | * @param pVM The virtual machine.
|
---|
2572 | * @param cr0 Guest context CR0 register
|
---|
2573 | * @param cr3 Guest context CR3 register
|
---|
2574 | * @param cr4 Guest context CR4 register
|
---|
2575 | * @param fGlobal Including global page directories or not
|
---|
2576 | */
|
---|
2577 | PGM_BTH_DECL(int, SyncCR3)(PVM pVM, uint32_t cr0, uint32_t cr3, uint32_t cr4, bool fGlobal)
|
---|
2578 | {
|
---|
2579 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2580 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
2581 | if (VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3))
|
---|
2582 | fGlobal = true; /* Change this CR3 reload to be a global one. */
|
---|
2583 | # endif
|
---|
2584 | #endif
|
---|
2585 |
|
---|
2586 | /*
|
---|
2587 | * Update page access handlers.
|
---|
2588 | * The virtual are always flushed, while the physical are only on demand.
|
---|
2589 | * WARNING: We are incorrectly not doing global flushing on Virtual Handler updates. We'll
|
---|
2590 | * have to look into that later because it will have a bad influence on the performance.
|
---|
2591 | * @note SvL: There's no need for that. Just invalidate the virtual range(s).
|
---|
2592 | * bird: Yes, but that won't work for aliases.
|
---|
2593 | */
|
---|
2594 | /** @todo this MUST go away. See #1557. */
|
---|
2595 | STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncCR3Handlers), h);
|
---|
2596 | PGM_GST_NAME(HandlerVirtualUpdate)(pVM, cr4);
|
---|
2597 | STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncCR3Handlers), h);
|
---|
2598 |
|
---|
2599 | #ifdef PGMPOOL_WITH_MONITORING
|
---|
2600 | /*
|
---|
2601 | * When monitoring shadowed pages, we reset the modification counters on CR3 sync.
|
---|
2602 | * Occationally we will have to clear all the shadow page tables because we wanted
|
---|
2603 | * to monitor a page which was mapped by too many shadowed page tables. This operation
|
---|
2604 | * sometimes refered to as a 'lightweight flush'.
|
---|
2605 | */
|
---|
2606 | if (!(pVM->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL))
|
---|
2607 | pgmPoolMonitorModifiedClearAll(pVM);
|
---|
2608 | else
|
---|
2609 | {
|
---|
2610 | # ifdef IN_RING3
|
---|
2611 | pVM->pgm.s.fSyncFlags &= ~PGM_SYNC_CLEAR_PGM_POOL;
|
---|
2612 | pgmPoolClearAll(pVM);
|
---|
2613 | # else
|
---|
2614 | LogFlow(("SyncCR3: PGM_SYNC_CLEAR_PGM_POOL is set -> VINF_PGM_SYNC_CR3\n"));
|
---|
2615 | return VINF_PGM_SYNC_CR3;
|
---|
2616 | # endif
|
---|
2617 | }
|
---|
2618 | #endif
|
---|
2619 |
|
---|
2620 | Assert(fGlobal || (cr4 & X86_CR4_PGE));
|
---|
2621 | MY_STAM_COUNTER_INC(fGlobal ? &pVM->pgm.s.CTXMID(Stat,SyncCR3Global) : &pVM->pgm.s.CTXMID(Stat,SyncCR3NotGlobal));
|
---|
2622 |
|
---|
2623 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2624 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
2625 | /*
|
---|
2626 | * Get page directory addresses.
|
---|
2627 | */
|
---|
2628 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2629 | PX86PDE pPDEDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[0];
|
---|
2630 | # else
|
---|
2631 | PX86PDEPAE pPDEDst = &pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[0];
|
---|
2632 | # endif
|
---|
2633 |
|
---|
2634 | # if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2635 | PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
|
---|
2636 | # else /* PAE */
|
---|
2637 | PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, 0);
|
---|
2638 | # endif
|
---|
2639 |
|
---|
2640 | Assert(pPDSrc);
|
---|
2641 | #ifndef IN_GC
|
---|
2642 | Assert(MMPhysGCPhys2HCVirt(pVM, (RTGCPHYS)(cr3 & X86_CR3_PAGE_MASK), sizeof(*pPDSrc)) == pPDSrc);
|
---|
2643 | #endif
|
---|
2644 |
|
---|
2645 | /*
|
---|
2646 | * Iterate the page directory.
|
---|
2647 | */
|
---|
2648 | PPGMMAPPING pMapping;
|
---|
2649 | unsigned iPdNoMapping;
|
---|
2650 | const bool fRawR0Enabled = EMIsRawRing0Enabled(pVM);
|
---|
2651 | PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
|
---|
2652 |
|
---|
2653 | /* Only check mappings if they are supposed to be put into the shadow page table. */
|
---|
2654 | if (pgmMapAreMappingsEnabled(&pVM->pgm.s))
|
---|
2655 | {
|
---|
2656 | pMapping = pVM->pgm.s.CTXALLSUFF(pMappings);
|
---|
2657 | iPdNoMapping = (pMapping) ? pMapping->GCPtr >> X86_PD_SHIFT : ~0U; /** PAE todo */
|
---|
2658 | }
|
---|
2659 | else
|
---|
2660 | {
|
---|
2661 | pMapping = 0;
|
---|
2662 | iPdNoMapping = ~0U;
|
---|
2663 | }
|
---|
2664 |
|
---|
2665 | for (unsigned iPD = 0; iPD < ELEMENTS(pPDSrc->a); iPD++)
|
---|
2666 | {
|
---|
2667 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2668 | Assert(&pVM->pgm.s.CTXMID(p,32BitPD)->a[iPD] == pPDEDst);
|
---|
2669 | # else
|
---|
2670 | Assert(&pVM->pgm.s.CTXMID(ap,PaePDs)[iPD * 2 / 512]->a[iPD * 2 % 512] == pPDEDst);
|
---|
2671 | # endif
|
---|
2672 | register GSTPDE PdeSrc = pPDSrc->a[iPD];
|
---|
2673 | if ( PdeSrc.n.u1Present
|
---|
2674 | && (PdeSrc.n.u1User || fRawR0Enabled))
|
---|
2675 | {
|
---|
2676 | /*
|
---|
2677 | * Check for conflicts with GC mappings.
|
---|
2678 | */
|
---|
2679 | if (iPD == iPdNoMapping)
|
---|
2680 | {
|
---|
2681 | if (pVM->pgm.s.fMappingsFixed)
|
---|
2682 | {
|
---|
2683 | /* It's fixed, just skip the mapping. */
|
---|
2684 | const unsigned cPTs = pMapping->cPTs;
|
---|
2685 | iPD += cPTs - 1;
|
---|
2686 | pPDEDst += cPTs + (PGM_SHW_TYPE != PGM_TYPE_32BIT) * cPTs;
|
---|
2687 | pMapping = pMapping->CTXALLSUFF(pNext);
|
---|
2688 | iPdNoMapping = pMapping ? pMapping->GCPtr >> X86_PD_SHIFT : ~0U;
|
---|
2689 | continue;
|
---|
2690 | }
|
---|
2691 |
|
---|
2692 | #ifdef IN_RING3
|
---|
2693 | int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, iPD);
|
---|
2694 | if (VBOX_FAILURE(rc))
|
---|
2695 | return rc;
|
---|
2696 |
|
---|
2697 | /*
|
---|
2698 | * Update iPdNoMapping and pMapping.
|
---|
2699 | */
|
---|
2700 | pMapping = pVM->pgm.s.pMappingsR3;
|
---|
2701 | while (pMapping && pMapping->GCPtr < (iPD << X86_PD_SHIFT))
|
---|
2702 | pMapping = pMapping->pNextR3;
|
---|
2703 | iPdNoMapping = pMapping ? pMapping->GCPtr >> X86_PD_SHIFT : ~0U;
|
---|
2704 | #else
|
---|
2705 | LogFlow(("SyncCR3: detected conflict -> VINF_PGM_SYNC_CR3\n"));
|
---|
2706 | return VINF_PGM_SYNC_CR3;
|
---|
2707 | #endif
|
---|
2708 | }
|
---|
2709 |
|
---|
2710 | /*
|
---|
2711 | * Sync page directory entry.
|
---|
2712 | *
|
---|
2713 | * The current approach is to allocated the page table but to set
|
---|
2714 | * the entry to not-present and postpone the page table synching till
|
---|
2715 | * it's actually used.
|
---|
2716 | */
|
---|
2717 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2718 | const unsigned iPdShw = iPD; NOREF(iPdShw);
|
---|
2719 | # else
|
---|
2720 | for (unsigned i = 0, iPdShw = iPD * 2; i < 2; i++, iPdShw++) /* pray that the compiler unrolls this */
|
---|
2721 | # endif
|
---|
2722 | {
|
---|
2723 | SHWPDE PdeDst = *pPDEDst;
|
---|
2724 | if (PdeDst.n.u1Present)
|
---|
2725 | {
|
---|
2726 | PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
|
---|
2727 | RTGCPHYS GCPhys;
|
---|
2728 | if ( !PdeSrc.b.u1Size
|
---|
2729 | || !(cr4 & X86_CR4_PSE))
|
---|
2730 | {
|
---|
2731 | GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
|
---|
2732 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2733 | GCPhys |= i * (PAGE_SIZE / 2);
|
---|
2734 | # endif
|
---|
2735 | }
|
---|
2736 | else
|
---|
2737 | {
|
---|
2738 | GCPhys = PdeSrc.u & GST_PDE4M_PG_MASK;
|
---|
2739 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2740 | GCPhys |= i * X86_PAGE_2M_SIZE;
|
---|
2741 | # endif
|
---|
2742 | }
|
---|
2743 |
|
---|
2744 | if ( pShwPage->GCPhys == GCPhys
|
---|
2745 | && pShwPage->enmKind == PGM_BTH_NAME(CalcPageKind)(&PdeSrc, cr4)
|
---|
2746 | && ( pShwPage->fCached
|
---|
2747 | || ( !fGlobal
|
---|
2748 | && ( false
|
---|
2749 | # ifdef PGM_SKIP_GLOBAL_PAGEDIRS_ON_NONGLOBAL_FLUSH
|
---|
2750 | || ( (PdeSrc.u & (X86_PDE4M_PS | X86_PDE4M_G)) == (X86_PDE4M_PS | X86_PDE4M_G)
|
---|
2751 | && (cr4 & (X86_CR4_PGE | X86_CR4_PSE)) == (X86_CR4_PGE | X86_CR4_PSE)) /* global 2/4MB page. */
|
---|
2752 | || ( !pShwPage->fSeenNonGlobal
|
---|
2753 | && (cr4 & X86_CR4_PGE))
|
---|
2754 | # endif
|
---|
2755 | )
|
---|
2756 | )
|
---|
2757 | )
|
---|
2758 | && ( (PdeSrc.u & (X86_PDE_US | X86_PDE_RW)) == (PdeDst.u & (X86_PDE_US | X86_PDE_RW))
|
---|
2759 | || ( (cr4 & X86_CR4_PSE)
|
---|
2760 | && ((PdeSrc.u & (X86_PDE_US | X86_PDE4M_PS | X86_PDE4M_D)) | PGM_PDFLAGS_TRACK_DIRTY)
|
---|
2761 | == ((PdeDst.u & (X86_PDE_US | X86_PDE_RW | PGM_PDFLAGS_TRACK_DIRTY)) | X86_PDE4M_PS))
|
---|
2762 | )
|
---|
2763 | )
|
---|
2764 | {
|
---|
2765 | # ifdef VBOX_WITH_STATISTICS
|
---|
2766 | if ( !fGlobal
|
---|
2767 | && (PdeSrc.u & (X86_PDE4M_PS | X86_PDE4M_G)) == (X86_PDE4M_PS | X86_PDE4M_G)
|
---|
2768 | && (cr4 & (X86_CR4_PGE | X86_CR4_PSE)) == (X86_CR4_PGE | X86_CR4_PSE))
|
---|
2769 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstSkippedGlobalPD));
|
---|
2770 | else if (!fGlobal && !pShwPage->fSeenNonGlobal && (cr4 & X86_CR4_PGE))
|
---|
2771 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstSkippedGlobalPT));
|
---|
2772 | else
|
---|
2773 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstCacheHit));
|
---|
2774 | # endif /* VBOX_WITH_STATISTICS */
|
---|
2775 | /** @todo a replacement strategy isn't really needed unless we're using a very small pool < 512 pages.
|
---|
2776 | * The whole ageing stuff should be put in yet another set of #ifdefs. For now, let's just skip it. */
|
---|
2777 | //# ifdef PGMPOOL_WITH_CACHE
|
---|
2778 | // pgmPoolCacheUsed(pPool, pShwPage);
|
---|
2779 | //# endif
|
---|
2780 | }
|
---|
2781 | else
|
---|
2782 | {
|
---|
2783 | pgmPoolFreeByPage(pPool, pShwPage, SHW_POOL_ROOT_IDX, iPdShw);
|
---|
2784 | pPDEDst->u = 0;
|
---|
2785 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstFreed));
|
---|
2786 | }
|
---|
2787 | }
|
---|
2788 | else
|
---|
2789 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstNotPresent));
|
---|
2790 | pPDEDst++;
|
---|
2791 | }
|
---|
2792 | }
|
---|
2793 | else if (iPD != iPdNoMapping)
|
---|
2794 | {
|
---|
2795 | /*
|
---|
2796 | * Check if there is any page directory to mark not present here.
|
---|
2797 | */
|
---|
2798 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2799 | const unsigned iPdShw = iPD; NOREF(iPdShw);
|
---|
2800 | # else
|
---|
2801 | for (unsigned i = 0, iPdShw = iPD * 2; i < 2; i++, iPdShw++) /* pray that the compiler unrolls this */
|
---|
2802 | # endif
|
---|
2803 | {
|
---|
2804 | if (pPDEDst->n.u1Present)
|
---|
2805 | {
|
---|
2806 | pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, pPDEDst->u & SHW_PDE_PG_MASK), SHW_POOL_ROOT_IDX, iPdShw);
|
---|
2807 | pPDEDst->u = 0;
|
---|
2808 | MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstFreedSrcNP));
|
---|
2809 | }
|
---|
2810 | pPDEDst++;
|
---|
2811 | }
|
---|
2812 | }
|
---|
2813 | else
|
---|
2814 | {
|
---|
2815 | Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
|
---|
2816 | const unsigned cPTs = pMapping->cPTs;
|
---|
2817 | if (pVM->pgm.s.fMappingsFixed)
|
---|
2818 | {
|
---|
2819 | /* It's fixed, just skip the mapping. */
|
---|
2820 | pMapping = pMapping->CTXALLSUFF(pNext);
|
---|
2821 | iPdNoMapping = pMapping ? pMapping->GCPtr >> X86_PD_SHIFT : ~0U;
|
---|
2822 | }
|
---|
2823 | else
|
---|
2824 | {
|
---|
2825 | /*
|
---|
2826 | * Check for conflicts for subsequent pagetables
|
---|
2827 | * and advance to the next mapping.
|
---|
2828 | */
|
---|
2829 | iPdNoMapping = ~0U;
|
---|
2830 | unsigned iPT = cPTs;
|
---|
2831 | while (iPT-- > 1)
|
---|
2832 | {
|
---|
2833 | if ( pPDSrc->a[iPD + iPT].n.u1Present
|
---|
2834 | && (pPDSrc->a[iPD + iPT].n.u1User || fRawR0Enabled))
|
---|
2835 | {
|
---|
2836 | # ifdef IN_RING3
|
---|
2837 | int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, iPD);
|
---|
2838 | if (VBOX_FAILURE(rc))
|
---|
2839 | return rc;
|
---|
2840 |
|
---|
2841 | /*
|
---|
2842 | * Update iPdNoMapping and pMapping.
|
---|
2843 | */
|
---|
2844 | pMapping = pVM->pgm.s.CTXALLSUFF(pMappings);
|
---|
2845 | while (pMapping && pMapping->GCPtr < (iPD << X86_PD_SHIFT))
|
---|
2846 | pMapping = pMapping->CTXALLSUFF(pNext);
|
---|
2847 | iPdNoMapping = pMapping ? pMapping->GCPtr >> X86_PD_SHIFT : ~0U;
|
---|
2848 | break;
|
---|
2849 | # else
|
---|
2850 | LogFlow(("SyncCR3: detected conflict -> VINF_PGM_SYNC_CR3\n"));
|
---|
2851 | return VINF_PGM_SYNC_CR3;
|
---|
2852 | # endif
|
---|
2853 | }
|
---|
2854 | }
|
---|
2855 | if (iPdNoMapping == ~0U && pMapping)
|
---|
2856 | {
|
---|
2857 | pMapping = pMapping->CTXALLSUFF(pNext);
|
---|
2858 | if (pMapping)
|
---|
2859 | iPdNoMapping = pMapping->GCPtr >> X86_PD_SHIFT;
|
---|
2860 | }
|
---|
2861 | }
|
---|
2862 | /* advance. */
|
---|
2863 | iPD += cPTs - 1;
|
---|
2864 | pPDEDst += cPTs + (PGM_SHW_TYPE != PGM_TYPE_32BIT) * cPTs;
|
---|
2865 | }
|
---|
2866 |
|
---|
2867 | } /* for iPD */
|
---|
2868 | # elif PGM_SHW_TYPE == PGM_TYPE_AMD64
|
---|
2869 | # error "Guest 32-bit mode and shadow AMD64 mode doesn't add up!"
|
---|
2870 | # endif
|
---|
2871 |
|
---|
2872 | return VINF_SUCCESS;
|
---|
2873 |
|
---|
2874 | #elif PGM_GST_TYPE == PGM_TYPE_PAE
|
---|
2875 | # if PGM_SHW_TYPE == PGM_TYPE_PAE
|
---|
2876 | //# error not implemented
|
---|
2877 | return VERR_INTERNAL_ERROR;
|
---|
2878 |
|
---|
2879 | # else /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
2880 | # error "Guest PAE mode, but not the shadow mode ; 32bit - maybe, but amd64 no."
|
---|
2881 | # endif /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
2882 |
|
---|
2883 | #elif PGM_GST_TYPE == PGM_TYPE_AMD64
|
---|
2884 | # if PGM_SHW_TYPE == PGM_TYPE_AMD64
|
---|
2885 | //# error not implemented
|
---|
2886 | return VERR_INTERNAL_ERROR;
|
---|
2887 |
|
---|
2888 | # else /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
2889 | # error "Guest AMD64 mode, but not the shadow mode - that can't be right!"
|
---|
2890 | # endif /* PGM_SHW_TYPE != PGM_TYPE_AMD64 */
|
---|
2891 |
|
---|
2892 | #else /* guest real and protected mode */
|
---|
2893 |
|
---|
2894 | return VINF_SUCCESS;
|
---|
2895 | #endif
|
---|
2896 | }
|
---|
2897 |
|
---|
2898 |
|
---|
2899 |
|
---|
2900 |
|
---|
2901 | #ifdef VBOX_STRICT
|
---|
2902 | #ifdef IN_GC
|
---|
2903 | # undef AssertMsgFailed
|
---|
2904 | # define AssertMsgFailed Log
|
---|
2905 | #endif
|
---|
2906 | #ifdef IN_RING3
|
---|
2907 | # include <VBox/dbgf.h>
|
---|
2908 |
|
---|
2909 | /**
|
---|
2910 | * Dumps a page table hierarchy use only physical addresses and cr4/lm flags.
|
---|
2911 | *
|
---|
2912 | * @returns VBox status code (VINF_SUCCESS).
|
---|
2913 | * @param pVM The VM handle.
|
---|
2914 | * @param cr3 The root of the hierarchy.
|
---|
2915 | * @param crr The cr4, only PAE and PSE is currently used.
|
---|
2916 | * @param fLongMode Set if long mode, false if not long mode.
|
---|
2917 | * @param cMaxDepth Number of levels to dump.
|
---|
2918 | * @param pHlp Pointer to the output functions.
|
---|
2919 | */
|
---|
2920 | __BEGIN_DECLS
|
---|
2921 | PGMR3DECL(int) PGMR3DumpHierarchyHC(PVM pVM, uint32_t cr3, uint32_t cr4, bool fLongMode, unsigned cMaxDepth, PCDBGFINFOHLP pHlp);
|
---|
2922 | __END_DECLS
|
---|
2923 |
|
---|
2924 | #endif
|
---|
2925 |
|
---|
2926 | /**
|
---|
2927 | * Checks that the shadow page table is in sync with the guest one.
|
---|
2928 | *
|
---|
2929 | * @returns The number of errors.
|
---|
2930 | * @param pVM The virtual machine.
|
---|
2931 | * @param cr3 Guest context CR3 register
|
---|
2932 | * @param cr4 Guest context CR4 register
|
---|
2933 | * @param GCPtr Where to start. Defaults to 0.
|
---|
2934 | * @param cb How much to check. Defaults to everything.
|
---|
2935 | */
|
---|
2936 | PGM_BTH_DECL(unsigned, AssertCR3)(PVM pVM, uint32_t cr3, uint32_t cr4, RTGCUINTPTR GCPtr, RTGCUINTPTR cb)
|
---|
2937 | {
|
---|
2938 | unsigned cErrors = 0;
|
---|
2939 |
|
---|
2940 | #if PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
2941 |
|
---|
2942 | # if PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
|
---|
2943 | # error "Invalid shadow mode for 32-bit guest paging."
|
---|
2944 | # endif
|
---|
2945 |
|
---|
2946 | PPGM pPGM = &pVM->pgm.s;
|
---|
2947 | RTHCPHYS HCPhysShw; /* page address derived from the shadow page tables. */
|
---|
2948 | RTGCPHYS GCPhysGst; /* page address derived from the guest page tables. */
|
---|
2949 | RTHCPHYS HCPhys; /* general usage. */
|
---|
2950 | int rc;
|
---|
2951 |
|
---|
2952 | /*
|
---|
2953 | * Check that the Guest CR3 and all it's mappings are correct.
|
---|
2954 | */
|
---|
2955 | AssertMsgReturn(pPGM->GCPhysCR3 == (cr3 & X86_CR3_PAGE_MASK),
|
---|
2956 | ("Invalid GCPhysCR3=%VGp cr3=%VGp\n", pPGM->GCPhysCR3, (RTGCPHYS)cr3),
|
---|
2957 | false);
|
---|
2958 | rc = PGMShwGetPage(pVM, pPGM->pGuestPDGC, NULL, &HCPhysShw);
|
---|
2959 | AssertRCReturn(rc, 1);
|
---|
2960 | HCPhys = NIL_RTHCPHYS;
|
---|
2961 | rc = pgmRamGCPhys2HCPhys(pPGM, cr3 & X86_CR3_PAGE_MASK, &HCPhys);
|
---|
2962 | AssertMsgReturn(HCPhys == HCPhysShw, ("HCPhys=%VHp HCPhyswShw=%VHp (cr3)\n", HCPhys, HCPhysShw), false);
|
---|
2963 | # ifdef IN_RING3
|
---|
2964 | RTGCPHYS GCPhys;
|
---|
2965 | rc = PGMR3DbgHCPtr2GCPhys(pVM, pPGM->pGuestPDHC, &GCPhys);
|
---|
2966 | AssertRCReturn(rc, 1);
|
---|
2967 | AssertMsgReturn((cr3 & X86_CR3_PAGE_MASK) == GCPhys, ("GCPhys=%VGp cr3=%VGp\n", GCPhys, (RTGCPHYS)cr3), false);
|
---|
2968 | # endif
|
---|
2969 | const X86PD *pPDSrc = CTXSUFF(pPGM->pGuestPD);
|
---|
2970 |
|
---|
2971 | /*
|
---|
2972 | * Get and check the Shadow CR3.
|
---|
2973 | */
|
---|
2974 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
2975 | const X86PD *pPDDst = pPGM->CTXMID(p,32BitPD);
|
---|
2976 | unsigned cPDEs = ELEMENTS(pPDDst->a);
|
---|
2977 | # else
|
---|
2978 | const X86PDPAE *pPDDst = pPGM->CTXMID(ap,PaePDs[0]); /* use it as a 2048 entry PD */
|
---|
2979 | unsigned cPDEs = ELEMENTS(pPDDst->a) * ELEMENTS(pPGM->apHCPaePDs);
|
---|
2980 | # endif
|
---|
2981 | if (cb != ~(RTGCUINTPTR)0)
|
---|
2982 | cPDEs = RT_MIN(cb >> SHW_PD_SHIFT, 1);
|
---|
2983 |
|
---|
2984 | /** @todo call the other two PGMAssert*() functions. */
|
---|
2985 |
|
---|
2986 | /*
|
---|
2987 | * Iterate the shadow page directory.
|
---|
2988 | */
|
---|
2989 | GCPtr = (GCPtr >> SHW_PD_SHIFT) << SHW_PD_SHIFT;
|
---|
2990 | unsigned iPDDst = GCPtr >> SHW_PD_SHIFT;
|
---|
2991 | cPDEs += iPDDst;
|
---|
2992 | for (;
|
---|
2993 | iPDDst < cPDEs;
|
---|
2994 | iPDDst++, GCPtr += _4G / cPDEs)
|
---|
2995 | {
|
---|
2996 | const SHWPDE PdeDst = pPDDst->a[iPDDst];
|
---|
2997 | if (PdeDst.u & PGM_PDFLAGS_MAPPING)
|
---|
2998 | {
|
---|
2999 | Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
|
---|
3000 | if ((PdeDst.u & X86_PDE_AVL_MASK) != PGM_PDFLAGS_MAPPING)
|
---|
3001 | {
|
---|
3002 | AssertMsgFailed(("Mapping shall only have PGM_PDFLAGS_MAPPING set! PdeDst.u=%#RX64\n", (uint64_t)PdeDst.u));
|
---|
3003 | cErrors++;
|
---|
3004 | continue;
|
---|
3005 | }
|
---|
3006 | }
|
---|
3007 | else if ( (PdeDst.u & X86_PDE_P)
|
---|
3008 | || ((PdeDst.u & (X86_PDE_P | PGM_PDFLAGS_TRACK_DIRTY)) == (X86_PDE_P | PGM_PDFLAGS_TRACK_DIRTY))
|
---|
3009 | )
|
---|
3010 | {
|
---|
3011 | HCPhysShw = PdeDst.u & SHW_PDE_PG_MASK;
|
---|
3012 | PPGMPOOLPAGE pPoolPage = pgmPoolGetPageByHCPhys(pVM, HCPhysShw);
|
---|
3013 | if (!pPoolPage)
|
---|
3014 | {
|
---|
3015 | AssertMsgFailed(("Invalid page table address %VGp at %VGv! PdeDst=%#RX64\n",
|
---|
3016 | HCPhysShw, GCPtr, (uint64_t)PdeDst.u));
|
---|
3017 | cErrors++;
|
---|
3018 | continue;
|
---|
3019 | }
|
---|
3020 | const SHWPT *pPTDst = (const SHWPT *)PGMPOOL_PAGE_2_PTR(pVM, pPoolPage);
|
---|
3021 |
|
---|
3022 | if (PdeDst.u & (X86_PDE4M_PWT | X86_PDE4M_PCD))
|
---|
3023 | {
|
---|
3024 | AssertMsgFailed(("PDE flags PWT and/or PCD is set at %VGv! These flags are not virtualized! PdeDst=%#RX64\n",
|
---|
3025 | GCPtr, (uint64_t)PdeDst.u));
|
---|
3026 | cErrors++;
|
---|
3027 | }
|
---|
3028 |
|
---|
3029 | if (PdeDst.u & (X86_PDE4M_G | X86_PDE4M_D))
|
---|
3030 | {
|
---|
3031 | AssertMsgFailed(("4K PDE reserved flags at %VGv! PdeDst=%#RX64\n",
|
---|
3032 | GCPtr, (uint64_t)PdeDst.u));
|
---|
3033 | cErrors++;
|
---|
3034 | }
|
---|
3035 |
|
---|
3036 | const X86PDE PdeSrc = pPDSrc->a[iPDDst >> (GST_PD_SHIFT - SHW_PD_SHIFT)];
|
---|
3037 | if (!PdeSrc.n.u1Present)
|
---|
3038 | {
|
---|
3039 | AssertMsgFailed(("Guest PDE at %VGv is not present! PdeDst=%#RX64 PdeSrc=%#RX64\n",
|
---|
3040 | GCPtr, (uint64_t)PdeDst.u, (uint64_t)PdeSrc.u));
|
---|
3041 | cErrors++;
|
---|
3042 | continue;
|
---|
3043 | }
|
---|
3044 |
|
---|
3045 | if ( !PdeSrc.b.u1Size
|
---|
3046 | || !(cr4 & X86_CR4_PSE))
|
---|
3047 | {
|
---|
3048 | GCPhysGst = PdeSrc.u & GST_PDE_PG_MASK;
|
---|
3049 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
3050 | GCPhysGst |= (iPDDst & 1) * (PAGE_SIZE / 2);
|
---|
3051 | # endif
|
---|
3052 | }
|
---|
3053 | else
|
---|
3054 | {
|
---|
3055 | if (PdeSrc.u & X86_PDE4M_PG_HIGH_MASK)
|
---|
3056 | {
|
---|
3057 | AssertMsgFailed(("Guest PDE at %VGv is using PSE36 or similar! PdeSrc=%#RX64\n",
|
---|
3058 | GCPtr, (uint64_t)PdeSrc.u));
|
---|
3059 | cErrors++;
|
---|
3060 | continue;
|
---|
3061 | }
|
---|
3062 | GCPhysGst = PdeSrc.u & GST_PDE4M_PG_MASK;
|
---|
3063 | # if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
|
---|
3064 | GCPhysGst |= GCPtr & RT_BIT(X86_PAGE_2M_SHIFT);
|
---|
3065 | # endif
|
---|
3066 | }
|
---|
3067 |
|
---|
3068 | if ( pPoolPage->enmKind
|
---|
3069 | != (!PdeSrc.b.u1Size || !(cr4 & X86_CR4_PSE) ? BTH_PGMPOOLKIND_PT_FOR_PT : BTH_PGMPOOLKIND_PT_FOR_BIG))
|
---|
3070 | {
|
---|
3071 | AssertMsgFailed(("Invalid shadow page table kind %d at %VGv! PdeSrc=%#RX64\n",
|
---|
3072 | pPoolPage->enmKind, GCPtr, (uint64_t)PdeSrc.u));
|
---|
3073 | cErrors++;
|
---|
3074 | }
|
---|
3075 |
|
---|
3076 | PPGMPAGE pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
|
---|
3077 | if (!pPhysPage)
|
---|
3078 | {
|
---|
3079 | AssertMsgFailed(("Cannot find guest physical address %VGp in the PDE at %VGv! PdeSrc=%#RX64\n",
|
---|
3080 | GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
|
---|
3081 | cErrors++;
|
---|
3082 | continue;
|
---|
3083 | }
|
---|
3084 |
|
---|
3085 | if (GCPhysGst != pPoolPage->GCPhys)
|
---|
3086 | {
|
---|
3087 | AssertMsgFailed(("GCPhysGst=%VGp != pPage->GCPhys=%VGp at %VGv\n",
|
---|
3088 | GCPhysGst, pPoolPage->GCPhys, GCPtr));
|
---|
3089 | cErrors++;
|
---|
3090 | continue;
|
---|
3091 | }
|
---|
3092 |
|
---|
3093 | if ( !PdeSrc.b.u1Size
|
---|
3094 | || !(cr4 & X86_CR4_PSE))
|
---|
3095 | {
|
---|
3096 | /*
|
---|
3097 | * Page Table.
|
---|
3098 | */
|
---|
3099 | const GSTPT *pPTSrc;
|
---|
3100 | rc = PGM_GCPHYS_2_PTR(pVM, GCPhysGst & ~(RTGCPHYS)(PAGE_SIZE - 1), &pPTSrc);
|
---|
3101 | if (VBOX_FAILURE(rc))
|
---|
3102 | {
|
---|
3103 | AssertMsgFailed(("Cannot map/convert guest physical address %VGp in the PDE at %VGv! PdeSrc=%#RX64\n",
|
---|
3104 | GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
|
---|
3105 | cErrors++;
|
---|
3106 | continue;
|
---|
3107 | }
|
---|
3108 | if ( (PdeSrc.u & (X86_PDE_P | X86_PDE_US | X86_PDE_RW/* | X86_PDE_A*/))
|
---|
3109 | != (PdeDst.u & (X86_PDE_P | X86_PDE_US | X86_PDE_RW/* | X86_PDE_A*/)))
|
---|
3110 | {
|
---|
3111 | /// @todo We get here a lot on out-of-sync CR3 entries. The access handler should zap them to avoid false alarms here!
|
---|
3112 | // (This problem will go away when/if we shadow multiple CR3s.)
|
---|
3113 | AssertMsgFailed(("4K PDE flags mismatch at %VGv! PdeSrc=%#RX64 PdeDst=%#RX64\n",
|
---|
3114 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3115 | cErrors++;
|
---|
3116 | continue;
|
---|
3117 | }
|
---|
3118 | if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
|
---|
3119 | {
|
---|
3120 | AssertMsgFailed(("4K PDEs cannot have PGM_PDFLAGS_TRACK_DIRTY set! GCPtr=%VGv PdeDst=%#RX64\n",
|
---|
3121 | GCPtr, (uint64_t)PdeDst.u));
|
---|
3122 | cErrors++;
|
---|
3123 | continue;
|
---|
3124 | }
|
---|
3125 |
|
---|
3126 | /* iterate the page table. */
|
---|
3127 | # if PGM_SHW_TYPE == PGM_TYPE_32BIT
|
---|
3128 | const unsigned offPTSrc = 0;
|
---|
3129 | # else
|
---|
3130 | const unsigned offPTSrc = ((GCPtr >> SHW_PD_SHIFT) & 1) * 512;
|
---|
3131 | # endif
|
---|
3132 | for (unsigned iPT = 0, off = 0;
|
---|
3133 | iPT < ELEMENTS(pPTDst->a);
|
---|
3134 | iPT++, off += PAGE_SIZE)
|
---|
3135 | {
|
---|
3136 | const SHWPTE PteDst = pPTDst->a[iPT];
|
---|
3137 |
|
---|
3138 | /* skip not-present entries. */
|
---|
3139 | if (!(PteDst.u & (X86_PTE_P | PGM_PTFLAGS_TRACK_DIRTY))) /** @todo deal with ALL handlers and CSAM !P pages! */
|
---|
3140 | continue;
|
---|
3141 | Assert(PteDst.n.u1Present);
|
---|
3142 |
|
---|
3143 | const GSTPTE PteSrc = pPTSrc->a[iPT + offPTSrc];
|
---|
3144 | if (!PteSrc.n.u1Present)
|
---|
3145 | {
|
---|
3146 | #ifdef IN_RING3
|
---|
3147 | PGMAssertHandlerAndFlagsInSync(pVM);
|
---|
3148 | PGMR3DumpHierarchyGC(pVM, cr3, cr4, (PdeSrc.u & GST_PDE_PG_MASK));
|
---|
3149 | #endif
|
---|
3150 | AssertMsgFailed(("Out of sync (!P) PTE at %VGv! PteSrc=%#RX64 PteDst=%#RX64 pPTSrc=%VGv iPTSrc=%x PdeSrc=%x physpte=%VGp\n",
|
---|
3151 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u, pPTSrc, iPT + offPTSrc, PdeSrc.au32[0],
|
---|
3152 | (PdeSrc.u & GST_PDE_PG_MASK) + (iPT + offPTSrc)*sizeof(PteSrc)));
|
---|
3153 | cErrors++;
|
---|
3154 | continue;
|
---|
3155 | }
|
---|
3156 |
|
---|
3157 | uint64_t fIgnoreFlags = GST_PTE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_G | X86_PTE_D | X86_PTE_PWT | X86_PTE_PCD | X86_PTE_PAT;
|
---|
3158 | # if 1 /** @todo sync accessed bit properly... */
|
---|
3159 | fIgnoreFlags |= X86_PTE_A;
|
---|
3160 | # endif
|
---|
3161 |
|
---|
3162 | /* match the physical addresses */
|
---|
3163 | HCPhysShw = PteDst.u & SHW_PTE_PG_MASK;
|
---|
3164 | GCPhysGst = PteSrc.u & GST_PTE_PG_MASK;
|
---|
3165 |
|
---|
3166 | # ifdef IN_RING3
|
---|
3167 | rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
|
---|
3168 | if (VBOX_FAILURE(rc))
|
---|
3169 | {
|
---|
3170 | if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
|
---|
3171 | {
|
---|
3172 | AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3173 | GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3174 | cErrors++;
|
---|
3175 | continue;
|
---|
3176 | }
|
---|
3177 | }
|
---|
3178 | else if (HCPhysShw != (HCPhys & SHW_PTE_PG_MASK))
|
---|
3179 | {
|
---|
3180 | AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3181 | GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3182 | cErrors++;
|
---|
3183 | continue;
|
---|
3184 | }
|
---|
3185 | # endif
|
---|
3186 |
|
---|
3187 | pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
|
---|
3188 | if (!pPhysPage)
|
---|
3189 | {
|
---|
3190 | # ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
|
---|
3191 | if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
|
---|
3192 | {
|
---|
3193 | AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3194 | GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3195 | cErrors++;
|
---|
3196 | continue;
|
---|
3197 | }
|
---|
3198 | # endif
|
---|
3199 | if (PteDst.n.u1Write)
|
---|
3200 | {
|
---|
3201 | AssertMsgFailed(("Invalid guest page at %VGv is writable! GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3202 | GCPtr + off, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3203 | cErrors++;
|
---|
3204 | }
|
---|
3205 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3206 | }
|
---|
3207 | else if (HCPhysShw != (PGM_PAGE_GET_HCPHYS(pPhysPage) & SHW_PTE_PG_MASK))
|
---|
3208 | {
|
---|
3209 | AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3210 | GCPtr + off, HCPhysShw, pPhysPage->HCPhys, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3211 | cErrors++;
|
---|
3212 | continue;
|
---|
3213 | }
|
---|
3214 |
|
---|
3215 | /* flags */
|
---|
3216 | if (pPhysPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)) /** @todo PAGE FLAGS */
|
---|
3217 | {
|
---|
3218 | if (pPhysPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)) /** @todo PAGE FLAGS */
|
---|
3219 | {
|
---|
3220 | if (PteDst.n.u1Write)
|
---|
3221 | {
|
---|
3222 | AssertMsgFailed(("WRITE access flagged at %VGv but the page is writable! HCPhys=%VGv PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3223 | GCPtr + off, pPhysPage->HCPhys, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3224 | cErrors++;
|
---|
3225 | continue;
|
---|
3226 | }
|
---|
3227 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3228 | }
|
---|
3229 | else
|
---|
3230 | {
|
---|
3231 | if (PteDst.n.u1Present)
|
---|
3232 | {
|
---|
3233 | AssertMsgFailed(("ALL access flagged at %VGv but the page is present! HCPhys=%VHp PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3234 | GCPtr + off, pPhysPage->HCPhys, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3235 | cErrors++;
|
---|
3236 | continue;
|
---|
3237 | }
|
---|
3238 | fIgnoreFlags |= X86_PTE_P;
|
---|
3239 | }
|
---|
3240 | }
|
---|
3241 | else
|
---|
3242 | {
|
---|
3243 | if (!PteSrc.n.u1Dirty && PteSrc.n.u1Write)
|
---|
3244 | {
|
---|
3245 | if (PteDst.n.u1Write)
|
---|
3246 | {
|
---|
3247 | AssertMsgFailed(("!DIRTY page at %VGv is writable! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3248 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3249 | cErrors++;
|
---|
3250 | continue;
|
---|
3251 | }
|
---|
3252 | if (!(PteDst.u & PGM_PTFLAGS_TRACK_DIRTY))
|
---|
3253 | {
|
---|
3254 | AssertMsgFailed(("!DIRTY page at %VGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3255 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3256 | cErrors++;
|
---|
3257 | continue;
|
---|
3258 | }
|
---|
3259 | if (PteDst.n.u1Dirty)
|
---|
3260 | {
|
---|
3261 | AssertMsgFailed(("!DIRTY page at %VGv is marked DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3262 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3263 | cErrors++;
|
---|
3264 | }
|
---|
3265 | # if 0 /** @todo sync access bit properly... */
|
---|
3266 | if (PteDst.n.u1Accessed != PteSrc.n.u1Accessed)
|
---|
3267 | {
|
---|
3268 | AssertMsgFailed(("!DIRTY page at %VGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3269 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3270 | cErrors++;
|
---|
3271 | }
|
---|
3272 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3273 | # else
|
---|
3274 | fIgnoreFlags |= X86_PTE_RW | X86_PTE_A;
|
---|
3275 | # endif
|
---|
3276 | }
|
---|
3277 | else if (PteDst.u & PGM_PTFLAGS_TRACK_DIRTY)
|
---|
3278 | {
|
---|
3279 | /* access bit emulation (not implemented). */
|
---|
3280 | if (PteSrc.n.u1Accessed || PteDst.n.u1Present)
|
---|
3281 | {
|
---|
3282 | AssertMsgFailed(("PGM_PTFLAGS_TRACK_DIRTY set at %VGv but no accessed bit emulation! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3283 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3284 | cErrors++;
|
---|
3285 | continue;
|
---|
3286 | }
|
---|
3287 | if (!PteDst.n.u1Accessed)
|
---|
3288 | {
|
---|
3289 | AssertMsgFailed(("!ACCESSED page at %VGv is has the accessed bit set! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3290 | GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3291 | cErrors++;
|
---|
3292 | }
|
---|
3293 | fIgnoreFlags |= X86_PTE_P;
|
---|
3294 | }
|
---|
3295 | # ifdef DEBUG_sandervl
|
---|
3296 | fIgnoreFlags |= X86_PTE_D | X86_PTE_A;
|
---|
3297 | # endif
|
---|
3298 | }
|
---|
3299 |
|
---|
3300 | if ( (PteSrc.u & ~fIgnoreFlags) != (PteDst.u & ~fIgnoreFlags)
|
---|
3301 | && (PteSrc.u & ~(fIgnoreFlags | X86_PTE_RW)) != (PteDst.u & ~fIgnoreFlags)
|
---|
3302 | )
|
---|
3303 | {
|
---|
3304 | AssertMsgFailed(("Flags mismatch at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3305 | GCPtr + off, (uint64_t)PteSrc.u & ~fIgnoreFlags, (uint64_t)PteDst.u & ~fIgnoreFlags,
|
---|
3306 | fIgnoreFlags, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
|
---|
3307 | cErrors++;
|
---|
3308 | continue;
|
---|
3309 | }
|
---|
3310 | } /* foreach PTE */
|
---|
3311 | }
|
---|
3312 | else
|
---|
3313 | {
|
---|
3314 | /*
|
---|
3315 | * Big Page.
|
---|
3316 | */
|
---|
3317 | uint64_t fIgnoreFlags = X86_PDE_AVL_MASK | X86_PDE_PAE_PG_MASK | X86_PDE4M_G | X86_PDE4M_D | X86_PDE4M_PS | X86_PDE4M_PWT | X86_PDE4M_PCD;
|
---|
3318 | if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
|
---|
3319 | {
|
---|
3320 | if (PdeDst.n.u1Write)
|
---|
3321 | {
|
---|
3322 | AssertMsgFailed(("!DIRTY page at %VGv is writable! PdeSrc=%#RX64 PdeDst=%#RX64\n",
|
---|
3323 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3324 | cErrors++;
|
---|
3325 | continue;
|
---|
3326 | }
|
---|
3327 | if (!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY))
|
---|
3328 | {
|
---|
3329 | AssertMsgFailed(("!DIRTY page at %VGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3330 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3331 | cErrors++;
|
---|
3332 | continue;
|
---|
3333 | }
|
---|
3334 | # if 0 /** @todo sync access bit properly... */
|
---|
3335 | if (PdeDst.n.u1Accessed != PdeSrc.b.u1Accessed)
|
---|
3336 | {
|
---|
3337 | AssertMsgFailed(("!DIRTY page at %VGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3338 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3339 | cErrors++;
|
---|
3340 | }
|
---|
3341 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3342 | # else
|
---|
3343 | fIgnoreFlags |= X86_PTE_RW | X86_PTE_A;
|
---|
3344 | # endif
|
---|
3345 | }
|
---|
3346 | else if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
|
---|
3347 | {
|
---|
3348 | /* access bit emulation (not implemented). */
|
---|
3349 | if (PdeSrc.b.u1Accessed || PdeDst.n.u1Present)
|
---|
3350 | {
|
---|
3351 | AssertMsgFailed(("PGM_PDFLAGS_TRACK_DIRTY set at %VGv but no accessed bit emulation! PdeSrc=%#RX64 PdeDst=%#RX64\n",
|
---|
3352 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3353 | cErrors++;
|
---|
3354 | continue;
|
---|
3355 | }
|
---|
3356 | if (!PdeDst.n.u1Accessed)
|
---|
3357 | {
|
---|
3358 | AssertMsgFailed(("!ACCESSED page at %VGv is has the accessed bit set! PdeSrc=%#RX64 PdeDst=%#RX64\n",
|
---|
3359 | GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3360 | cErrors++;
|
---|
3361 | }
|
---|
3362 | fIgnoreFlags |= X86_PTE_P;
|
---|
3363 | }
|
---|
3364 |
|
---|
3365 | if ((PdeSrc.u & ~fIgnoreFlags) != (PdeDst.u & ~fIgnoreFlags))
|
---|
3366 | {
|
---|
3367 | AssertMsgFailed(("Flags mismatch (B) at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PdeDst=%#RX64\n",
|
---|
3368 | GCPtr, (uint64_t)PdeSrc.u & ~fIgnoreFlags, (uint64_t)PdeDst.u & ~fIgnoreFlags,
|
---|
3369 | fIgnoreFlags, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
|
---|
3370 | cErrors++;
|
---|
3371 | }
|
---|
3372 |
|
---|
3373 | /* iterate the page table. */
|
---|
3374 | for (unsigned iPT = 0, off = 0;
|
---|
3375 | iPT < ELEMENTS(pPTDst->a);
|
---|
3376 | iPT++, off += PAGE_SIZE, GCPhysGst += PAGE_SIZE)
|
---|
3377 | {
|
---|
3378 | const SHWPTE PteDst = pPTDst->a[iPT];
|
---|
3379 |
|
---|
3380 | if (PteDst.u & PGM_PTFLAGS_TRACK_DIRTY)
|
---|
3381 | {
|
---|
3382 | AssertMsgFailed(("The PTE at %VGv emulating a 2/4M page is marked TRACK_DIRTY! PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3383 | GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3384 | cErrors++;
|
---|
3385 | }
|
---|
3386 |
|
---|
3387 | /* skip not-present entries. */
|
---|
3388 | if (!PteDst.n.u1Present) /** @todo deal with ALL handlers and CSAM !P pages! */
|
---|
3389 | continue;
|
---|
3390 |
|
---|
3391 | fIgnoreFlags = X86_PTE_PAE_PG_MASK | X86_PTE_AVL_MASK | X86_PTE_PWT | X86_PTE_PCD | X86_PTE_PAT;
|
---|
3392 |
|
---|
3393 | /* match the physical addresses */
|
---|
3394 | HCPhysShw = PteDst.u & X86_PTE_PAE_PG_MASK;
|
---|
3395 |
|
---|
3396 | # ifdef IN_RING3
|
---|
3397 | rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
|
---|
3398 | if (VBOX_FAILURE(rc))
|
---|
3399 | {
|
---|
3400 | if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
|
---|
3401 | {
|
---|
3402 | AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3403 | GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3404 | cErrors++;
|
---|
3405 | }
|
---|
3406 | }
|
---|
3407 | else if (HCPhysShw != (HCPhys & X86_PTE_PAE_PG_MASK))
|
---|
3408 | {
|
---|
3409 | AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3410 | GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3411 | cErrors++;
|
---|
3412 | continue;
|
---|
3413 | }
|
---|
3414 | # endif
|
---|
3415 |
|
---|
3416 | pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
|
---|
3417 | if (!pPhysPage)
|
---|
3418 | {
|
---|
3419 | # ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
|
---|
3420 | if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
|
---|
3421 | {
|
---|
3422 | AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3423 | GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3424 | cErrors++;
|
---|
3425 | continue;
|
---|
3426 | }
|
---|
3427 | # endif
|
---|
3428 | if (PteDst.n.u1Write)
|
---|
3429 | {
|
---|
3430 | AssertMsgFailed(("Invalid guest page at %VGv is writable! GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3431 | GCPtr + off, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3432 | cErrors++;
|
---|
3433 | }
|
---|
3434 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3435 | }
|
---|
3436 | else if (HCPhysShw != (pPhysPage->HCPhys & X86_PTE_PAE_PG_MASK))
|
---|
3437 | {
|
---|
3438 | AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3439 | GCPtr + off, HCPhysShw, pPhysPage->HCPhys, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3440 | cErrors++;
|
---|
3441 | continue;
|
---|
3442 | }
|
---|
3443 |
|
---|
3444 | /* flags */
|
---|
3445 | if (pPhysPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_ALL | MM_RAM_FLAGS_VIRTUAL_ALL | MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)) /** @todo PAGE FLAGS */
|
---|
3446 | {
|
---|
3447 | if (pPhysPage->HCPhys & (MM_RAM_FLAGS_PHYSICAL_WRITE | MM_RAM_FLAGS_VIRTUAL_WRITE)) /** @todo PAGE FLAGS */
|
---|
3448 | {
|
---|
3449 | if (!(pPhysPage->HCPhys & MM_RAM_FLAGS_PHYSICAL_TEMP_OFF)) /** @todo PAGE FLAGS */
|
---|
3450 | {
|
---|
3451 | if (PteDst.n.u1Write)
|
---|
3452 | {
|
---|
3453 | AssertMsgFailed(("WRITE access flagged at %VGv but the page is writable! HCPhys=%VGv PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3454 | GCPtr + off, pPhysPage->HCPhys, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3455 | cErrors++;
|
---|
3456 | continue;
|
---|
3457 | }
|
---|
3458 | fIgnoreFlags |= X86_PTE_RW;
|
---|
3459 | }
|
---|
3460 | }
|
---|
3461 | else
|
---|
3462 | {
|
---|
3463 | if (PteDst.n.u1Present)
|
---|
3464 | {
|
---|
3465 | AssertMsgFailed(("ALL access flagged at %VGv but the page is present! HCPhys=%VGv PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3466 | GCPtr + off, pPhysPage->HCPhys, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3467 | cErrors++;
|
---|
3468 | continue;
|
---|
3469 | }
|
---|
3470 | fIgnoreFlags |= X86_PTE_P;
|
---|
3471 | }
|
---|
3472 | }
|
---|
3473 |
|
---|
3474 | if ( (PdeSrc.u & ~fIgnoreFlags) != (PteDst.u & ~fIgnoreFlags)
|
---|
3475 | && (PdeSrc.u & ~(fIgnoreFlags | X86_PTE_RW)) != (PteDst.u & ~fIgnoreFlags) /* lazy phys handler dereg. */
|
---|
3476 | )
|
---|
3477 | {
|
---|
3478 | AssertMsgFailed(("Flags mismatch (BT) at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PteDst=%#RX64\n",
|
---|
3479 | GCPtr + off, (uint64_t)PdeSrc.u & ~fIgnoreFlags, (uint64_t)PteDst.u & ~fIgnoreFlags,
|
---|
3480 | fIgnoreFlags, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
|
---|
3481 | cErrors++;
|
---|
3482 | continue;
|
---|
3483 | }
|
---|
3484 | } /* foreach PTE */
|
---|
3485 | }
|
---|
3486 | }
|
---|
3487 | /* not present */
|
---|
3488 |
|
---|
3489 | } /* forearch PDE */
|
---|
3490 |
|
---|
3491 | # ifdef DEBUG
|
---|
3492 | if (cErrors)
|
---|
3493 | LogFlow(("AssertCR3: cErrors=%d\n", cErrors));
|
---|
3494 | # endif
|
---|
3495 |
|
---|
3496 | #elif PGM_GST_TYPE == PGM_TYPE_PAE
|
---|
3497 | //# error not implemented
|
---|
3498 |
|
---|
3499 |
|
---|
3500 | #elif PGM_GST_TYPE == PGM_TYPE_AMD64
|
---|
3501 | //# error not implemented
|
---|
3502 |
|
---|
3503 | /*#else: guest real and protected mode */
|
---|
3504 | #endif
|
---|
3505 | return cErrors;
|
---|
3506 | }
|
---|
3507 | #endif /* VBOX_STRICT */
|
---|
3508 |
|
---|