| 1 | /** @file
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| 2 | *
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| 3 | * PGM - Page Monitor, Guest Context.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * If you received this file as part of a commercial VirtualBox
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| 18 | * distribution, then only the terms of your commercial VirtualBox
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| 19 | * license agreement apply instead of the previous paragraph.
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| 20 | */
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| 21 |
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| 22 |
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| 23 | /*******************************************************************************
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| 24 | * Header Files *
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| 25 | *******************************************************************************/
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| 26 | #define LOG_GROUP LOG_GROUP_PGM
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| 27 | #include <VBox/pgm.h>
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| 28 | #include <VBox/cpum.h>
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| 29 | #include <VBox/mm.h>
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| 30 | #include <VBox/em.h>
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| 31 | #include <VBox/selm.h>
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| 32 | #include <VBox/iom.h>
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| 33 | #include <VBox/trpm.h>
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| 34 | #include <VBox/rem.h>
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| 35 | #include "PGMInternal.h"
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| 36 | #include <VBox/vm.h>
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| 37 |
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| 38 | #include <iprt/asm.h>
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| 39 | #include <iprt/assert.h>
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| 40 | #include <VBox/log.h>
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| 41 | #include <VBox/param.h>
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| 42 | #include <VBox/err.h>
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| 43 | #include <VBox/dis.h>
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| 44 | #include <VBox/disopcode.h>
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| 45 |
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| 46 |
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| 47 |
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| 48 | /*******************************************************************************
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| 49 | * Internal Functions *
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| 50 | *******************************************************************************/
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| 51 |
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| 52 |
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| 53 |
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| 54 | #ifndef __AMD64__
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| 55 | /*
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| 56 | * Shadow - 32-bit mode
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| 57 | */
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| 58 | #define PGM_SHW_TYPE PGM_TYPE_32BIT
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| 59 | #define PGM_SHW_NAME(name) PGM_SHW_NAME_32BIT(name)
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| 60 | #include "PGMGCShw.h"
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| 61 |
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| 62 | /* Guest - real mode */
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| 63 | #define PGM_GST_TYPE PGM_TYPE_REAL
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| 64 | #define PGM_GST_NAME(name) PGM_GST_NAME_REAL(name)
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| 65 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_32BIT_REAL(name)
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| 66 | #include "PGMGCGst.h"
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| 67 | #include "PGMGCBth.h"
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| 68 | #undef PGM_BTH_NAME
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| 69 | #undef PGM_GST_TYPE
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| 70 | #undef PGM_GST_NAME
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| 71 |
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| 72 | /* Guest - protected mode */
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| 73 | #define PGM_GST_TYPE PGM_TYPE_PROT
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| 74 | #define PGM_GST_NAME(name) PGM_GST_NAME_PROT(name)
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| 75 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_32BIT_PROT(name)
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| 76 | #include "PGMGCGst.h"
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| 77 | #include "PGMGCBth.h"
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| 78 | #undef PGM_BTH_NAME
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| 79 | #undef PGM_GST_TYPE
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| 80 | #undef PGM_GST_NAME
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| 81 |
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| 82 | /* Guest - 32-bit mode */
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| 83 | #define PGM_GST_TYPE PGM_TYPE_32BIT
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| 84 | #define PGM_GST_NAME(name) PGM_GST_NAME_32BIT(name)
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| 85 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_32BIT_32BIT(name)
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| 86 | #include "PGMGCGst.h"
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| 87 | #include "PGMGCBth.h"
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| 88 | #undef PGM_BTH_NAME
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| 89 | #undef PGM_GST_TYPE
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| 90 | #undef PGM_GST_NAME
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| 91 |
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| 92 | #undef PGM_SHW_TYPE
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| 93 | #undef PGM_SHW_NAME
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| 94 | #endif /* !__AMD64__ */
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| 95 |
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| 96 |
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| 97 | /*
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| 98 | * Shadow - PAE mode
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| 99 | */
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| 100 | #define PGM_SHW_TYPE PGM_TYPE_PAE
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| 101 | #define PGM_SHW_NAME(name) PGM_SHW_NAME_PAE(name)
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| 102 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_REAL(name)
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| 103 | #include "PGMGCShw.h"
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| 104 |
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| 105 | /* Guest - real mode */
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| 106 | #define PGM_GST_TYPE PGM_TYPE_REAL
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| 107 | #define PGM_GST_NAME(name) PGM_GST_NAME_REAL(name)
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| 108 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_REAL(name)
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| 109 | #include "PGMGCBth.h"
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| 110 | #undef PGM_BTH_NAME
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| 111 | #undef PGM_GST_TYPE
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| 112 | #undef PGM_GST_NAME
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| 113 |
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| 114 | /* Guest - protected mode */
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| 115 | #define PGM_GST_TYPE PGM_TYPE_PROT
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| 116 | #define PGM_GST_NAME(name) PGM_GST_NAME_PROT(name)
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| 117 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_PROT(name)
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| 118 | #include "PGMGCBth.h"
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| 119 | #undef PGM_BTH_NAME
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| 120 | #undef PGM_GST_TYPE
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| 121 | #undef PGM_GST_NAME
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| 122 |
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| 123 | /* Guest - 32-bit mode */
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| 124 | #define PGM_GST_TYPE PGM_TYPE_32BIT
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| 125 | #define PGM_GST_NAME(name) PGM_GST_NAME_32BIT(name)
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| 126 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_32BIT(name)
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| 127 | #include "PGMGCBth.h"
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| 128 | #undef PGM_BTH_NAME
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| 129 | #undef PGM_GST_TYPE
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| 130 | #undef PGM_GST_NAME
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| 131 |
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| 132 | /* Guest - PAE mode */
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| 133 | #define PGM_GST_TYPE PGM_TYPE_PAE
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| 134 | #define PGM_GST_NAME(name) PGM_GST_NAME_PAE(name)
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| 135 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_PAE(name)
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| 136 | #include "PGMGCGst.h"
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| 137 | #include "PGMGCBth.h"
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| 138 | #undef PGM_BTH_NAME
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| 139 | #undef PGM_GST_TYPE
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| 140 | #undef PGM_GST_NAME
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| 141 |
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| 142 | #undef PGM_SHW_TYPE
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| 143 | #undef PGM_SHW_NAME
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| 144 |
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| 145 |
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| 146 | /*
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| 147 | * Shadow - AMD64 mode
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| 148 | */
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| 149 | #define PGM_SHW_TYPE PGM_TYPE_AMD64
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| 150 | #define PGM_SHW_NAME(name) PGM_SHW_NAME_AMD64(name)
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| 151 | #include "PGMGCShw.h"
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| 152 |
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| 153 | /* Guest - real mode */
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| 154 | #define PGM_GST_TYPE PGM_TYPE_REAL
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| 155 | #define PGM_GST_NAME(name) PGM_GST_NAME_REAL(name)
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| 156 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_AMD64_REAL(name)
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| 157 | #include "PGMGCBth.h"
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| 158 | #undef PGM_BTH_NAME
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| 159 | #undef PGM_GST_NAME
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| 160 | #undef PGM_GST_TYPE
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| 161 |
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| 162 | /* Guest - protected mode */
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| 163 | #define PGM_GST_TYPE PGM_TYPE_PROT
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| 164 | #define PGM_GST_NAME(name) PGM_GST_NAME_PROT(name)
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| 165 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_AMD64_PROT(name)
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| 166 | #include "PGMGCBth.h"
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| 167 | #undef PGM_BTH_NAME
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| 168 | #undef PGM_GST_TYPE
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| 169 | #undef PGM_GST_NAME
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| 170 |
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| 171 | /* Guest - AMD64 mode */
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| 172 | #define PGM_GST_TYPE PGM_TYPE_AMD64
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| 173 | #define PGM_GST_NAME(name) PGM_GST_NAME_AMD64(name)
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| 174 | #define PGM_BTH_NAME(name) PGM_BTH_NAME_AMD64_AMD64(name)
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| 175 | #include "PGMGCGst.h"
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| 176 | #include "PGMGCBth.h"
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| 177 | #undef PGM_BTH_NAME
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| 178 | #undef PGM_GST_TYPE
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| 179 | #undef PGM_GST_NAME
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| 180 |
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| 181 | #undef PGM_SHW_TYPE
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| 182 | #undef PGM_SHW_NAME
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| 183 |
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| 184 |
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| 185 | /**
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| 186 | * Temporarily maps one guest page specified by GC physical address.
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| 187 | * These pages must have a physical mapping in HC, i.e. they cannot be MMIO pages.
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| 188 | *
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| 189 | * Be WARNED that the dynamic page mapping area is small, 8 pages, thus the space is
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| 190 | * reused after 8 mappings (or perhaps a few more if you score with the cache).
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| 191 | *
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| 192 | * @returns VBox status.
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| 193 | * @param pVM VM handle.
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| 194 | * @param GCPhys GC Physical address of the page.
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| 195 | * @param ppv Where to store the address of the mapping.
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| 196 | */
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| 197 | PGMGCDECL(int) PGMGCDynMapGCPage(PVM pVM, RTGCPHYS GCPhys, void **ppv)
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| 198 | {
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| 199 | AssertMsg(!(GCPhys & PAGE_OFFSET_MASK), ("GCPhys=%VGp\n", GCPhys));
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| 200 |
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| 201 | /*
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| 202 | * Get the ram range.
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| 203 | */
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| 204 | PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesGC;
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| 205 | while (pRam && GCPhys - pRam->GCPhys >= pRam->cb)
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| 206 | pRam = pRam->pNextGC;
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| 207 | if (!pRam)
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| 208 | {
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| 209 | AssertMsgFailed(("Invalid physical address %VGp!\n", GCPhys));
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| 210 | return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
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| 211 | }
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| 212 |
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| 213 | /*
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| 214 | * Pass it on to PGMGCDynMapHCPage.
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| 215 | */
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| 216 | RTHCPHYS HCPhys = pRam->aHCPhys[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT] & X86_PTE_PAE_PG_MASK;
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| 217 | //Log(("PGMGCDynMapGCPage: GCPhys=%VGp HCPhys=%VHp\n", GCPhys, HCPhys));
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| 218 | return PGMGCDynMapHCPage(pVM, HCPhys, ppv);
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| 219 | }
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| 220 |
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| 221 |
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| 222 | /**
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| 223 | * Temporarily maps one guest page specified by unaligned GC physical address.
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| 224 | * These pages must have a physical mapping in HC, i.e. they cannot be MMIO pages.
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| 225 | *
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| 226 | * Be WARNED that the dynamic page mapping area is small, 8 pages, thus the space is
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| 227 | * reused after 8 mappings (or perhaps a few more if you score with the cache).
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| 228 | *
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| 229 | * The caller is aware that only the speicifed page is mapped and that really bad things
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| 230 | * will happen if writing beyond the page!
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| 231 | *
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| 232 | * @returns VBox status.
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| 233 | * @param pVM VM handle.
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| 234 | * @param GCPhys GC Physical address within the page to be mapped.
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| 235 | * @param ppv Where to store the address of the mapping address corresponding to GCPhys.
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| 236 | */
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| 237 | PGMGCDECL(int) PGMGCDynMapGCPageEx(PVM pVM, RTGCPHYS GCPhys, void **ppv)
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| 238 | {
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| 239 | /*
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| 240 | * Get the ram range.
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| 241 | */
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| 242 | PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesGC;
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| 243 | while (pRam && GCPhys - pRam->GCPhys >= pRam->cb)
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| 244 | pRam = pRam->pNextGC;
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| 245 | if (!pRam)
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| 246 | {
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| 247 | AssertMsgFailed(("Invalid physical address %VGp!\n", GCPhys));
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| 248 | return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
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| 249 | }
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| 250 |
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| 251 | /*
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| 252 | * Pass it on to PGMGCDynMapHCPage.
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| 253 | */
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| 254 | RTHCPHYS HCPhys = pRam->aHCPhys[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT] & X86_PTE_PAE_PG_MASK;
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| 255 | int rc = PGMGCDynMapHCPage(pVM, HCPhys, ppv);
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| 256 | if (VBOX_SUCCESS(rc))
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| 257 | *ppv = (void *)((uintptr_t)*ppv | (GCPhys & PAGE_OFFSET_MASK));
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| 258 | return rc;
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| 259 | }
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| 260 |
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| 261 |
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| 262 | /**
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| 263 | * Temporarily maps one host page specified by HC physical address.
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| 264 | *
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| 265 | * Be WARNED that the dynamic page mapping area is small, 8 pages, thus the space is
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| 266 | * reused after 8 mappings (or perhaps a few more if you score with the cache).
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| 267 | *
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| 268 | * @returns VBox status.
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| 269 | * @param pVM VM handle.
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| 270 | * @param HCPhys HC Physical address of the page.
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| 271 | * @param ppv Where to store the address of the mapping.
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| 272 | */
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| 273 | PGMGCDECL(int) PGMGCDynMapHCPage(PVM pVM, RTHCPHYS HCPhys, void **ppv)
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| 274 | {
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| 275 | AssertMsg(!(HCPhys & PAGE_OFFSET_MASK), ("HCPhys=%VHp\n", HCPhys));
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| 276 |
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| 277 | /*
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| 278 | * Check the cache.
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| 279 | */
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| 280 | register unsigned iCache;
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| 281 | if ( pVM->pgm.s.aHCPhysDynPageMapCache[iCache = 0] == HCPhys
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| 282 | || pVM->pgm.s.aHCPhysDynPageMapCache[iCache = 1] == HCPhys
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| 283 | || pVM->pgm.s.aHCPhysDynPageMapCache[iCache = 2] == HCPhys
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| 284 | || pVM->pgm.s.aHCPhysDynPageMapCache[iCache = 3] == HCPhys)
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| 285 | {
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| 286 | static const uint8_t au8Trans[MM_HYPER_DYNAMIC_SIZE >> PAGE_SHIFT][ELEMENTS(pVM->pgm.s.aHCPhysDynPageMapCache)] =
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| 287 | {
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| 288 | { 0, 5, 6, 7 },
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| 289 | { 0, 1, 6, 7 },
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| 290 | { 0, 1, 2, 7 },
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| 291 | { 0, 1, 2, 3 },
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| 292 | { 4, 1, 2, 3 },
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| 293 | { 4, 5, 2, 3 },
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| 294 | { 4, 5, 6, 3 },
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| 295 | { 4, 5, 6, 7 },
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| 296 | };
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| 297 | Assert(ELEMENTS(au8Trans) == 8);
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| 298 | Assert(ELEMENTS(au8Trans[0]) == 4);
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| 299 | int iPage = au8Trans[pVM->pgm.s.iDynPageMapLast][iCache];
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| 300 | void *pv = pVM->pgm.s.pbDynPageMapBaseGC + (iPage << PAGE_SHIFT);
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| 301 | *ppv = pv;
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| 302 | STAM_COUNTER_INC(&pVM->pgm.s.StatDynMapCacheHits);
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| 303 | //Log(("PGMGCDynMapHCPage: HCPhys=%VHp pv=%VGv iPage=%d iCache=%d\n", HCPhys, pv, iPage, iCache));
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| 304 | return VINF_SUCCESS;
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| 305 | }
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| 306 | Assert(ELEMENTS(pVM->pgm.s.aHCPhysDynPageMapCache) == 4);
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| 307 | STAM_COUNTER_INC(&pVM->pgm.s.StatDynMapCacheMisses);
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| 308 |
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| 309 | /*
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| 310 | * Update the page tables.
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| 311 | */
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| 312 | register unsigned iPage = pVM->pgm.s.iDynPageMapLast;
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| 313 | pVM->pgm.s.iDynPageMapLast = iPage = (iPage + 1) & ((MM_HYPER_DYNAMIC_SIZE >> PAGE_SHIFT) - 1);
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| 314 | Assert((MM_HYPER_DYNAMIC_SIZE >> PAGE_SHIFT) == 8);
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| 315 |
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| 316 | pVM->pgm.s.aHCPhysDynPageMapCache[iPage & (ELEMENTS(pVM->pgm.s.aHCPhysDynPageMapCache) - 1)] = HCPhys;
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| 317 | pVM->pgm.s.paDynPageMap32BitPTEsGC[iPage].u = (uint32_t)HCPhys | X86_PTE_P | X86_PTE_A | X86_PTE_D;
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| 318 | pVM->pgm.s.paDynPageMapPaePTEsGC[iPage].u = HCPhys | X86_PTE_P | X86_PTE_A | X86_PTE_D;
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| 319 |
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| 320 | void *pv = pVM->pgm.s.pbDynPageMapBaseGC + (iPage << PAGE_SHIFT);
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| 321 | *ppv = pv;
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| 322 | ASMInvalidatePage(pv);
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| 323 | Log4(("PGMGCDynMapHCPage: HCPhys=%VHp pv=%VGv iPage=%d\n", HCPhys, pv, iPage));
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| 324 | return VINF_SUCCESS;
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| 325 | }
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| 326 |
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| 327 |
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| 328 | /**
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| 329 | * Emulation of the invlpg instruction.
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| 330 | *
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| 331 | * @returns VBox status code suitable for scheduling.
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| 332 | * @param pVM VM handle.
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| 333 | * @param GCPtrPage Page to invalidate.
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| 334 | */
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| 335 | PGMGCDECL(int) PGMGCInvalidatePage(PVM pVM, RTGCPTR GCPtrPage)
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| 336 | {
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| 337 | LogFlow(("PGMGCInvalidatePage: GCPtrPage=%VGv\n", GCPtrPage));
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| 338 |
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| 339 | STAM_PROFILE_START(&CTXMID(pVM->pgm.s.Stat,InvalidatePage), a);
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| 340 |
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| 341 | /*
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| 342 | * Check for conflicts and pending CR3 monitoring updates.
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| 343 | */
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| 344 | if (!pVM->pgm.s.fMappingsFixed)
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| 345 | {
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| 346 | if ( pgmGetMapping(pVM, GCPtrPage)
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| 347 | /** @todo && (PGMGstGetPDE(pVM, GCPtrPage) & X86_PDE_P) - FIX THIS NOW!!! */ )
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| 348 | {
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| 349 | LogFlow(("PGMGCInvalidatePage: Conflict!\n"));
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| 350 | VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3);
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| 351 | STAM_PROFILE_STOP(&CTXMID(pVM->pgm.s.Stat,InvalidatePage), a);
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| 352 | return VINF_PGM_SYNC_CR3;
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| 353 | }
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| 354 |
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| 355 | if (pVM->pgm.s.fSyncFlags & PGM_SYNC_MONITOR_CR3)
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| 356 | {
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| 357 | LogFlow(("PGMGCInvalidatePage: PGM_SYNC_MONITOR_CR3 -> reinterpret instruction in HC\n"));
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| 358 | STAM_PROFILE_STOP(&CTXMID(pVM->pgm.s.Stat,InvalidatePage), a);
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| 359 | /** @todo counter for these... */
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| 360 | return VINF_EM_RAW_EMULATE_INSTR;
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| 361 | }
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| 362 | }
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| 363 |
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| 364 | /*
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| 365 | * Notify the recompiler so it can record this instruction.
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| 366 | * Failure happens when it's out of space. We'll return to HC in that case.
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| 367 | */
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| 368 | int rc = REMNotifyInvalidatePage(pVM, GCPtrPage);
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| 369 | if (rc == VINF_SUCCESS)
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| 370 | rc = PGM_BTH_PFN(InvalidatePage, pVM)(pVM, GCPtrPage);
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| 371 |
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| 372 | STAM_PROFILE_STOP(&CTXMID(pVM->pgm.s.Stat,InvalidatePage), a);
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| 373 | return rc;
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|---|
| 374 | }
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