1 | /** @file
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2 | * HM - VMX Structures and Definitions. (VMM)
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3 | */
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4 |
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5 | /*
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6 | * Copyright (C) 2006-2024 Oracle and/or its affiliates.
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7 | *
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8 | * This file is part of VirtualBox base platform packages, as
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9 | * available from https://www.virtualbox.org.
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10 | *
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11 | * This program is free software; you can redistribute it and/or
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12 | * modify it under the terms of the GNU General Public License
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13 | * as published by the Free Software Foundation, in version 3 of the
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14 | * License.
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15 | *
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16 | * This program is distributed in the hope that it will be useful, but
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17 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 | * General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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23 | *
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24 | * The contents of this file may alternatively be used under the terms
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25 | * of the Common Development and Distribution License Version 1.0
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26 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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27 | * in the VirtualBox distribution, in which case the provisions of the
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28 | * CDDL are applicable instead of those of the GPL.
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29 | *
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30 | * You may elect to license modified versions of this file under the
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31 | * terms and conditions of either the GPL or the CDDL or both.
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32 | *
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33 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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34 | */
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35 |
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36 | #ifndef VBOX_INCLUDED_vmm_hmvmxinline_h
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37 | #define VBOX_INCLUDED_vmm_hmvmxinline_h
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38 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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39 | # pragma once
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40 | #endif
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41 |
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42 | #include <VBox/vmm/hm_vmx.h>
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43 | #include <VBox/err.h>
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44 |
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45 | /* In Visual C++ versions prior to 2012, the vmx intrinsics are only available
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46 | when targeting AMD64. */
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47 | #if RT_INLINE_ASM_USES_INTRIN >= RT_MSC_VER_VS2010 && defined(RT_ARCH_AMD64)
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48 | # include <iprt/sanitized/intrin.h>
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49 | /* We always want them as intrinsics, no functions. */
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50 | # pragma intrinsic(__vmx_on)
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51 | # pragma intrinsic(__vmx_off)
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52 | # pragma intrinsic(__vmx_vmclear)
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53 | # pragma intrinsic(__vmx_vmptrld)
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54 | # pragma intrinsic(__vmx_vmread)
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55 | # pragma intrinsic(__vmx_vmwrite)
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56 | # define VMX_USE_MSC_INTRINSICS 1
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57 | #else
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58 | # define VMX_USE_MSC_INTRINSICS 0
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59 | #endif
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60 |
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61 | /**
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62 | * Whether we think the assembler supports VMX instructions.
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63 | *
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64 | * Guess that GCC 5 should have sufficient recent enough binutils.
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65 | */
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66 | #if RT_INLINE_ASM_GNU_STYLE && RT_GNUC_PREREQ(5,0)
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67 | # define VMX_USE_GNU_STYLE_INLINE_VMX_INSTRUCTIONS 1
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68 | #else
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69 | # define VMX_USE_GNU_STYLE_INLINE_VMX_INSTRUCTIONS 0
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70 | #endif
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71 |
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72 | /** Whether we can use the subsection trick to put error handling code
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73 | * elsewhere. */
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74 | #if VMX_USE_GNU_STYLE_INLINE_VMX_INSTRUCTIONS && defined(__ELF__)
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75 | # define VMX_USE_GNU_STYLE_INLINE_SECTION_TRICK 1
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76 | #else
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77 | # define VMX_USE_GNU_STYLE_INLINE_SECTION_TRICK 0
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78 | #endif
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79 |
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80 | /* Skip checking VMREAD/VMWRITE failures on non-strict builds. */
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81 | #ifndef VBOX_STRICT
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82 | # define VBOX_WITH_VMREAD_VMWRITE_NOCHECK
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83 | #endif
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84 |
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85 |
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86 | /** @defgroup grp_hm_vmx_inline VMX Inline Helpers
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87 | * @ingroup grp_hm_vmx
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88 | * @{
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89 | */
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90 | /**
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91 | * Gets the effective width of a VMCS field given it's encoding adjusted for
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92 | * HIGH/FULL access for 64-bit fields.
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93 | *
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94 | * @returns The effective VMCS field width.
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95 | * @param uFieldEnc The VMCS field encoding.
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96 | *
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97 | * @remarks Warning! This function does not verify the encoding is for a valid and
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98 | * supported VMCS field.
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99 | */
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100 | DECLINLINE(uint8_t) VMXGetVmcsFieldWidthEff(uint32_t uFieldEnc)
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101 | {
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102 | /* Only the "HIGH" parts of all 64-bit fields have bit 0 set. */
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103 | if (uFieldEnc & RT_BIT(0))
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104 | return VMXVMCSFIELDWIDTH_32BIT;
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105 |
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106 | /* Bits 13:14 contains the width of the VMCS field, see VMXVMCSFIELDWIDTH_XXX. */
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107 | return (uFieldEnc >> 13) & 0x3;
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108 | }
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109 |
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110 |
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111 | /**
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112 | * Returns whether the given VMCS field is a read-only VMCS field or not.
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113 | *
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114 | * @returns @c true if it's a read-only field, @c false otherwise.
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115 | * @param uFieldEnc The VMCS field encoding.
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116 | *
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117 | * @remarks Warning! This function does not verify that the encoding is for a valid
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118 | * and/or supported VMCS field.
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119 | */
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120 | DECLINLINE(bool) VMXIsVmcsFieldReadOnly(uint32_t uFieldEnc)
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121 | {
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122 | /* See Intel spec. B.4.2 "Natural-Width Read-Only Data Fields". */
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123 | return (RT_BF_GET(uFieldEnc, VMX_BF_VMCSFIELD_TYPE) == VMXVMCSFIELDTYPE_VMEXIT_INFO);
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124 | }
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125 |
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126 |
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127 | /**
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128 | * Returns whether the given VM-entry interruption-information type is valid or not.
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129 | *
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130 | * @returns @c true if it's a valid type, @c false otherwise.
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131 | * @param fSupportsMTF Whether the Monitor-Trap Flag CPU feature is supported.
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132 | * @param uType The VM-entry interruption-information type.
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133 | */
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134 | DECLINLINE(bool) VMXIsEntryIntInfoTypeValid(bool fSupportsMTF, uint8_t uType)
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135 | {
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136 | /* See Intel spec. 26.2.1.3 "VM-Entry Control Fields". */
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137 | switch (uType)
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138 | {
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139 | case VMX_ENTRY_INT_INFO_TYPE_EXT_INT:
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140 | case VMX_ENTRY_INT_INFO_TYPE_NMI:
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141 | case VMX_ENTRY_INT_INFO_TYPE_HW_XCPT:
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142 | case VMX_ENTRY_INT_INFO_TYPE_SW_INT:
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143 | case VMX_ENTRY_INT_INFO_TYPE_PRIV_SW_XCPT:
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144 | case VMX_ENTRY_INT_INFO_TYPE_SW_XCPT: return true;
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145 | case VMX_ENTRY_INT_INFO_TYPE_OTHER_EVENT: return fSupportsMTF;
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146 | default:
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147 | return false;
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148 | }
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149 | }
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150 |
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151 |
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152 | /**
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153 | * Returns whether the given VM-entry interruption-information vector and type
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154 | * combination is valid or not.
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155 | *
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156 | * @returns @c true if it's a valid vector/type combination, @c false otherwise.
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157 | * @param uVector The VM-entry interruption-information vector.
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158 | * @param uType The VM-entry interruption-information type.
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159 | *
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160 | * @remarks Warning! This function does not validate the type field individually.
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161 | * Use it after verifying type is valid using HMVmxIsEntryIntInfoTypeValid.
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162 | */
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163 | DECLINLINE(bool) VMXIsEntryIntInfoVectorValid(uint8_t uVector, uint8_t uType)
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164 | {
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165 | /* See Intel spec. 26.2.1.3 "VM-Entry Control Fields". */
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166 | if ( uType == VMX_ENTRY_INT_INFO_TYPE_NMI
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167 | && uVector != X86_XCPT_NMI)
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168 | return false;
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169 | if ( uType == VMX_ENTRY_INT_INFO_TYPE_HW_XCPT
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170 | && uVector > X86_XCPT_LAST)
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171 | return false;
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172 | if ( uType == VMX_ENTRY_INT_INFO_TYPE_OTHER_EVENT
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173 | && uVector != VMX_ENTRY_INT_INFO_VECTOR_MTF)
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174 | return false;
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175 | return true;
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176 | }
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177 |
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178 |
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179 | /**
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180 | * Returns whether or not the VM-exit is trap-like or fault-like.
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181 | *
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182 | * @returns @c true if it's a trap-like VM-exit, @c false otherwise.
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183 | * @param uExitReason The VM-exit reason.
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184 | *
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185 | * @remarks Warning! This does not validate the VM-exit reason.
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186 | */
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187 | DECLINLINE(bool) VMXIsVmexitTrapLike(uint32_t uExitReason)
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188 | {
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189 | /*
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190 | * Trap-like VM-exits - The instruction causing the VM-exit completes before the
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191 | * VM-exit occurs.
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192 | *
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193 | * Fault-like VM-exits - The instruction causing the VM-exit is not completed before
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194 | * the VM-exit occurs.
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195 | *
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196 | * See Intel spec. 25.5.2 "Monitor Trap Flag".
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197 | * See Intel spec. 29.1.4 "EOI Virtualization".
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198 | * See Intel spec. 29.4.3.3 "APIC-Write VM Exits".
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199 | * See Intel spec. 29.1.2 "TPR Virtualization".
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200 | */
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201 | /** @todo NSTVMX: r=ramshankar: What about VM-exits due to debug traps (single-step,
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202 | * I/O breakpoints, data breakpoints), debug exceptions (data breakpoint)
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203 | * delayed by MovSS blocking, machine-check exceptions. */
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204 | switch (uExitReason)
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205 | {
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206 | case VMX_EXIT_MTF:
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207 | case VMX_EXIT_VIRTUALIZED_EOI:
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208 | case VMX_EXIT_APIC_WRITE:
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209 | case VMX_EXIT_TPR_BELOW_THRESHOLD:
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210 | return true;
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211 | }
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212 | return false;
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213 | }
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214 |
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215 |
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216 | /**
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217 | * Returns whether the VM-entry is vectoring or not given the VM-entry interruption
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218 | * information field.
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219 | *
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220 | * @returns @c true if the VM-entry is vectoring, @c false otherwise.
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221 | * @param uEntryIntInfo The VM-entry interruption information field.
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222 | * @param pEntryIntInfoType The VM-entry interruption information type field.
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223 | * Optional, can be NULL. Only updated when this
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224 | * function returns @c true.
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225 | */
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226 | DECLINLINE(bool) VMXIsVmentryVectoring(uint32_t uEntryIntInfo, uint8_t *pEntryIntInfoType)
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227 | {
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228 | /*
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229 | * The definition of what is a vectoring VM-entry is taken
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230 | * from Intel spec. 26.6 "Special Features of VM Entry".
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231 | */
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232 | if (!VMX_ENTRY_INT_INFO_IS_VALID(uEntryIntInfo))
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233 | return false;
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234 |
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235 | /* Scope and keep variable defines on top to satisy archaic c89 nonsense. */
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236 | {
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237 | uint8_t const uType = VMX_ENTRY_INT_INFO_TYPE(uEntryIntInfo);
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238 | switch (uType)
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239 | {
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240 | case VMX_ENTRY_INT_INFO_TYPE_EXT_INT:
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241 | case VMX_ENTRY_INT_INFO_TYPE_NMI:
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242 | case VMX_ENTRY_INT_INFO_TYPE_HW_XCPT:
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243 | case VMX_ENTRY_INT_INFO_TYPE_SW_INT:
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244 | case VMX_ENTRY_INT_INFO_TYPE_PRIV_SW_XCPT:
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245 | case VMX_ENTRY_INT_INFO_TYPE_SW_XCPT:
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246 | {
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247 | if (pEntryIntInfoType)
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248 | *pEntryIntInfoType = uType;
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249 | return true;
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250 | }
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251 | }
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252 | }
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253 | return false;
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254 | }
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255 |
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256 |
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257 | /**
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258 | * Gets the description for a VMX abort reason.
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259 | *
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260 | * @returns The descriptive string.
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261 | * @param enmAbort The VMX abort reason.
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262 | */
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263 | DECLINLINE(const char *) VMXGetAbortDesc(VMXABORT enmAbort)
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264 | {
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265 | switch (enmAbort)
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266 | {
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267 | case VMXABORT_NONE: return "VMXABORT_NONE";
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268 | case VMXABORT_SAVE_GUEST_MSRS: return "VMXABORT_SAVE_GUEST_MSRS";
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269 | case VMXBOART_HOST_PDPTE: return "VMXBOART_HOST_PDPTE";
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270 | case VMXABORT_CURRENT_VMCS_CORRUPT: return "VMXABORT_CURRENT_VMCS_CORRUPT";
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271 | case VMXABORT_LOAD_HOST_MSR: return "VMXABORT_LOAD_HOST_MSR";
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272 | case VMXABORT_MACHINE_CHECK_XCPT: return "VMXABORT_MACHINE_CHECK_XCPT";
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273 | case VMXABORT_HOST_NOT_IN_LONG_MODE: return "VMXABORT_HOST_NOT_IN_LONG_MODE";
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274 | default:
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275 | break;
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276 | }
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277 | return "Unknown/invalid";
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278 | }
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279 |
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280 |
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281 | /**
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282 | * Gets the description for a virtual VMCS state.
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283 | *
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284 | * @returns The descriptive string.
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285 | * @param fVmcsState The virtual-VMCS state.
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286 | */
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287 | DECLINLINE(const char *) VMXGetVmcsStateDesc(uint8_t fVmcsState)
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288 | {
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289 | switch (fVmcsState)
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290 | {
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291 | case VMX_V_VMCS_LAUNCH_STATE_CLEAR: return "Clear";
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292 | case VMX_V_VMCS_LAUNCH_STATE_CLEAR_LEGACY: return "Clear (Legacy)";
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293 | case VMX_V_VMCS_LAUNCH_STATE_LAUNCHED: return "Launched";
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294 | default: return "Unknown";
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295 | }
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296 | }
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297 |
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298 |
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299 | /**
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300 | * Gets the description for a VM-entry interruption information event type.
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301 | *
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302 | * @returns The descriptive string.
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303 | * @param uType The event type.
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304 | */
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305 | DECLINLINE(const char *) VMXGetEntryIntInfoTypeDesc(uint8_t uType)
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306 | {
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307 | switch (uType)
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308 | {
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309 | case VMX_ENTRY_INT_INFO_TYPE_EXT_INT: return "External Interrupt";
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310 | case VMX_ENTRY_INT_INFO_TYPE_NMI: return "NMI";
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311 | case VMX_ENTRY_INT_INFO_TYPE_HW_XCPT: return "Hardware Exception";
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312 | case VMX_ENTRY_INT_INFO_TYPE_SW_INT: return "Software Interrupt";
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313 | case VMX_ENTRY_INT_INFO_TYPE_PRIV_SW_XCPT: return "Priv. Software Exception";
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314 | case VMX_ENTRY_INT_INFO_TYPE_SW_XCPT: return "Software Exception";
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315 | case VMX_ENTRY_INT_INFO_TYPE_OTHER_EVENT: return "Other Event";
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316 | default:
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317 | break;
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318 | }
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319 | return "Unknown/invalid";
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320 | }
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321 |
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322 |
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323 | /**
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324 | * Gets the description for a VM-exit interruption information event type.
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325 | *
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326 | * @returns The descriptive string.
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327 | * @param uType The event type.
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328 | */
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329 | DECLINLINE(const char *) VMXGetExitIntInfoTypeDesc(uint8_t uType)
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330 | {
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331 | switch (uType)
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332 | {
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333 | case VMX_EXIT_INT_INFO_TYPE_EXT_INT: return "External Interrupt";
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334 | case VMX_EXIT_INT_INFO_TYPE_NMI: return "NMI";
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335 | case VMX_EXIT_INT_INFO_TYPE_HW_XCPT: return "Hardware Exception";
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336 | case VMX_EXIT_INT_INFO_TYPE_SW_INT: return "Software Interrupt";
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337 | case VMX_EXIT_INT_INFO_TYPE_PRIV_SW_XCPT: return "Priv. Software Exception";
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338 | case VMX_EXIT_INT_INFO_TYPE_SW_XCPT: return "Software Exception";
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339 | default:
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340 | break;
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341 | }
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342 | return "Unknown/invalid";
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343 | }
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344 |
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345 |
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346 | /**
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347 | * Gets the description for an IDT-vectoring information event type.
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348 | *
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349 | * @returns The descriptive string.
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350 | * @param uType The event type.
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351 | */
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352 | DECLINLINE(const char *) VMXGetIdtVectoringInfoTypeDesc(uint8_t uType)
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353 | {
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354 | switch (uType)
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355 | {
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356 | case VMX_IDT_VECTORING_INFO_TYPE_EXT_INT: return "External Interrupt";
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357 | case VMX_IDT_VECTORING_INFO_TYPE_NMI: return "NMI";
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358 | case VMX_IDT_VECTORING_INFO_TYPE_HW_XCPT: return "Hardware Exception";
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359 | case VMX_IDT_VECTORING_INFO_TYPE_SW_INT: return "Software Interrupt";
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360 | case VMX_IDT_VECTORING_INFO_TYPE_PRIV_SW_XCPT: return "Priv. Software Exception";
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361 | case VMX_IDT_VECTORING_INFO_TYPE_SW_XCPT: return "Software Exception";
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362 | default:
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363 | break;
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364 | }
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365 | return "Unknown/invalid";
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366 | }
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367 |
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368 |
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369 | /** @} */
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370 |
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371 |
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372 | /** @defgroup grp_hm_vmx_asm VMX Assembly Helpers
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373 | * @{
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374 | */
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375 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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376 |
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377 | /**
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378 | * Dispatches an NMI to the host.
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379 | */
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380 | DECLASM(int) VMXDispatchHostNmi(void);
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381 |
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382 |
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383 | /**
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384 | * Executes VMXON.
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385 | *
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386 | * @returns VBox status code.
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387 | * @param HCPhysVmxOn Physical address of VMXON structure.
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388 | */
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389 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
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390 | DECLASM(int) VMXEnable(RTHCPHYS HCPhysVmxOn);
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391 | #else
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392 | DECLINLINE(int) VMXEnable(RTHCPHYS HCPhysVmxOn)
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393 | {
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394 | # if VMX_USE_MSC_INTRINSICS
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395 | unsigned char rcMsc = __vmx_on(&HCPhysVmxOn);
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396 | if (RT_LIKELY(rcMsc == 0))
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397 | return VINF_SUCCESS;
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398 | return rcMsc == 2 ? VERR_VMX_INVALID_VMXON_PTR : VERR_VMX_VMXON_FAILED;
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399 |
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400 | # elif RT_INLINE_ASM_GNU_STYLE
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401 | # ifdef RT_ARCH_AMD64
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402 | int rc;
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403 | __asm__ __volatile__ (
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404 | "pushq %2 \n\t"
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405 | ".byte 0xf3, 0x0f, 0xc7, 0x34, 0x24 # VMXON [esp] \n\t"
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406 | "ja 2f \n\t"
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407 | "je 1f \n\t"
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408 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMXON_PTR)", %0 \n\t"
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409 | "jmp 2f \n\t"
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410 | "1: \n\t"
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411 | "movl $" RT_XSTR(VERR_VMX_VMXON_FAILED)", %0 \n\t"
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412 | "2: \n\t"
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413 | "add $8, %%rsp \n\t"
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---|
414 | :"=rm"(rc)
|
---|
415 | :"0"(VINF_SUCCESS),
|
---|
416 | "ir"(HCPhysVmxOn) /* don't allow direct memory reference here, */
|
---|
417 | /* this would not work with -fomit-frame-pointer */
|
---|
418 | :"memory"
|
---|
419 | );
|
---|
420 | return rc;
|
---|
421 | # else
|
---|
422 | int rc;
|
---|
423 | __asm__ __volatile__ (
|
---|
424 | "push %3 \n\t"
|
---|
425 | "push %2 \n\t"
|
---|
426 | ".byte 0xf3, 0x0f, 0xc7, 0x34, 0x24 # VMXON [esp] \n\t"
|
---|
427 | "ja 2f \n\t"
|
---|
428 | "je 1f \n\t"
|
---|
429 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMXON_PTR)", %0 \n\t"
|
---|
430 | "jmp 2f \n\t"
|
---|
431 | "1: \n\t"
|
---|
432 | "movl $" RT_XSTR(VERR_VMX_VMXON_FAILED)", %0 \n\t"
|
---|
433 | "2: \n\t"
|
---|
434 | "add $8, %%esp \n\t"
|
---|
435 | :"=rm"(rc)
|
---|
436 | :"0"(VINF_SUCCESS),
|
---|
437 | "ir"((uint32_t)HCPhysVmxOn), /* don't allow direct memory reference here, */
|
---|
438 | "ir"((uint32_t)(HCPhysVmxOn >> 32)) /* this would not work with -fomit-frame-pointer */
|
---|
439 | :"memory"
|
---|
440 | );
|
---|
441 | return rc;
|
---|
442 | # endif
|
---|
443 |
|
---|
444 | # elif defined(RT_ARCH_X86)
|
---|
445 | int rc = VINF_SUCCESS;
|
---|
446 | __asm
|
---|
447 | {
|
---|
448 | push dword ptr [HCPhysVmxOn + 4]
|
---|
449 | push dword ptr [HCPhysVmxOn]
|
---|
450 | _emit 0xf3
|
---|
451 | _emit 0x0f
|
---|
452 | _emit 0xc7
|
---|
453 | _emit 0x34
|
---|
454 | _emit 0x24 /* VMXON [esp] */
|
---|
455 | jnc vmxon_good
|
---|
456 | mov dword ptr [rc], VERR_VMX_INVALID_VMXON_PTR
|
---|
457 | jmp the_end
|
---|
458 |
|
---|
459 | vmxon_good:
|
---|
460 | jnz the_end
|
---|
461 | mov dword ptr [rc], VERR_VMX_VMXON_FAILED
|
---|
462 | the_end:
|
---|
463 | add esp, 8
|
---|
464 | }
|
---|
465 | return rc;
|
---|
466 |
|
---|
467 | # else
|
---|
468 | # error "Shouldn't be here..."
|
---|
469 | # endif
|
---|
470 | }
|
---|
471 | #endif
|
---|
472 |
|
---|
473 |
|
---|
474 | /**
|
---|
475 | * Executes VMXOFF.
|
---|
476 | */
|
---|
477 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
|
---|
478 | DECLASM(void) VMXDisable(void);
|
---|
479 | #else
|
---|
480 | DECLINLINE(void) VMXDisable(void)
|
---|
481 | {
|
---|
482 | # if VMX_USE_MSC_INTRINSICS
|
---|
483 | __vmx_off();
|
---|
484 |
|
---|
485 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
486 | __asm__ __volatile__ (
|
---|
487 | ".byte 0x0f, 0x01, 0xc4 # VMXOFF \n\t"
|
---|
488 | );
|
---|
489 |
|
---|
490 | # elif defined(RT_ARCH_X86)
|
---|
491 | __asm
|
---|
492 | {
|
---|
493 | _emit 0x0f
|
---|
494 | _emit 0x01
|
---|
495 | _emit 0xc4 /* VMXOFF */
|
---|
496 | }
|
---|
497 |
|
---|
498 | # else
|
---|
499 | # error "Shouldn't be here..."
|
---|
500 | # endif
|
---|
501 | }
|
---|
502 | #endif
|
---|
503 |
|
---|
504 |
|
---|
505 | /**
|
---|
506 | * Executes VMCLEAR.
|
---|
507 | *
|
---|
508 | * @returns VBox status code.
|
---|
509 | * @param HCPhysVmcs Physical address of VM control structure.
|
---|
510 | */
|
---|
511 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
|
---|
512 | DECLASM(int) VMXClearVmcs(RTHCPHYS HCPhysVmcs);
|
---|
513 | #else
|
---|
514 | DECLINLINE(int) VMXClearVmcs(RTHCPHYS HCPhysVmcs)
|
---|
515 | {
|
---|
516 | # if VMX_USE_MSC_INTRINSICS
|
---|
517 | unsigned char rcMsc = __vmx_vmclear(&HCPhysVmcs);
|
---|
518 | if (RT_LIKELY(rcMsc == 0))
|
---|
519 | return VINF_SUCCESS;
|
---|
520 | return VERR_VMX_INVALID_VMCS_PTR;
|
---|
521 |
|
---|
522 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
523 | # ifdef RT_ARCH_AMD64
|
---|
524 | int rc;
|
---|
525 | __asm__ __volatile__ (
|
---|
526 | "pushq %2 \n\t"
|
---|
527 | ".byte 0x66, 0x0f, 0xc7, 0x34, 0x24 # VMCLEAR [esp] \n\t"
|
---|
528 | "jnc 1f \n\t"
|
---|
529 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
530 | "1: \n\t"
|
---|
531 | "add $8, %%rsp \n\t"
|
---|
532 | :"=rm"(rc)
|
---|
533 | :"0"(VINF_SUCCESS),
|
---|
534 | "ir"(HCPhysVmcs) /* don't allow direct memory reference here, */
|
---|
535 | /* this would not work with -fomit-frame-pointer */
|
---|
536 | :"memory"
|
---|
537 | );
|
---|
538 | return rc;
|
---|
539 | # else
|
---|
540 | int rc;
|
---|
541 | __asm__ __volatile__ (
|
---|
542 | "push %3 \n\t"
|
---|
543 | "push %2 \n\t"
|
---|
544 | ".byte 0x66, 0x0f, 0xc7, 0x34, 0x24 # VMCLEAR [esp] \n\t"
|
---|
545 | "jnc 1f \n\t"
|
---|
546 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
547 | "1: \n\t"
|
---|
548 | "add $8, %%esp \n\t"
|
---|
549 | :"=rm"(rc)
|
---|
550 | :"0"(VINF_SUCCESS),
|
---|
551 | "ir"((uint32_t)HCPhysVmcs), /* don't allow direct memory reference here, */
|
---|
552 | "ir"((uint32_t)(HCPhysVmcs >> 32)) /* this would not work with -fomit-frame-pointer */
|
---|
553 | :"memory"
|
---|
554 | );
|
---|
555 | return rc;
|
---|
556 | # endif
|
---|
557 |
|
---|
558 | # elif defined(RT_ARCH_X86)
|
---|
559 | int rc = VINF_SUCCESS;
|
---|
560 | __asm
|
---|
561 | {
|
---|
562 | push dword ptr [HCPhysVmcs + 4]
|
---|
563 | push dword ptr [HCPhysVmcs]
|
---|
564 | _emit 0x66
|
---|
565 | _emit 0x0f
|
---|
566 | _emit 0xc7
|
---|
567 | _emit 0x34
|
---|
568 | _emit 0x24 /* VMCLEAR [esp] */
|
---|
569 | jnc success
|
---|
570 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_PTR
|
---|
571 | success:
|
---|
572 | add esp, 8
|
---|
573 | }
|
---|
574 | return rc;
|
---|
575 |
|
---|
576 | # else
|
---|
577 | # error "Shouldn't be here..."
|
---|
578 | # endif
|
---|
579 | }
|
---|
580 | #endif
|
---|
581 |
|
---|
582 |
|
---|
583 | /**
|
---|
584 | * Executes VMPTRLD.
|
---|
585 | *
|
---|
586 | * @returns VBox status code.
|
---|
587 | * @param HCPhysVmcs Physical address of VMCS structure.
|
---|
588 | */
|
---|
589 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
|
---|
590 | DECLASM(int) VMXLoadVmcs(RTHCPHYS HCPhysVmcs);
|
---|
591 | #else
|
---|
592 | DECLINLINE(int) VMXLoadVmcs(RTHCPHYS HCPhysVmcs)
|
---|
593 | {
|
---|
594 | # if VMX_USE_MSC_INTRINSICS
|
---|
595 | unsigned char rcMsc = __vmx_vmptrld(&HCPhysVmcs);
|
---|
596 | if (RT_LIKELY(rcMsc == 0))
|
---|
597 | return VINF_SUCCESS;
|
---|
598 | return VERR_VMX_INVALID_VMCS_PTR;
|
---|
599 |
|
---|
600 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
601 | # ifdef RT_ARCH_AMD64
|
---|
602 | int rc;
|
---|
603 | __asm__ __volatile__ (
|
---|
604 | "pushq %2 \n\t"
|
---|
605 | ".byte 0x0f, 0xc7, 0x34, 0x24 # VMPTRLD [esp] \n\t"
|
---|
606 | "jnc 1f \n\t"
|
---|
607 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
608 | "1: \n\t"
|
---|
609 | "add $8, %%rsp \n\t"
|
---|
610 | :"=rm"(rc)
|
---|
611 | :"0"(VINF_SUCCESS),
|
---|
612 | "ir"(HCPhysVmcs) /* don't allow direct memory reference here, */
|
---|
613 | /* this will not work with -fomit-frame-pointer */
|
---|
614 | :"memory"
|
---|
615 | );
|
---|
616 | return rc;
|
---|
617 | # else
|
---|
618 | int rc;
|
---|
619 | __asm__ __volatile__ (
|
---|
620 | "push %3 \n\t"
|
---|
621 | "push %2 \n\t"
|
---|
622 | ".byte 0x0f, 0xc7, 0x34, 0x24 # VMPTRLD [esp] \n\t"
|
---|
623 | "jnc 1f \n\t"
|
---|
624 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
625 | "1: \n\t"
|
---|
626 | "add $8, %%esp \n\t"
|
---|
627 | :"=rm"(rc)
|
---|
628 | :"0"(VINF_SUCCESS),
|
---|
629 | "ir"((uint32_t)HCPhysVmcs), /* don't allow direct memory reference here, */
|
---|
630 | "ir"((uint32_t)(HCPhysVmcs >> 32)) /* this will not work with -fomit-frame-pointer */
|
---|
631 | :"memory"
|
---|
632 | );
|
---|
633 | return rc;
|
---|
634 | # endif
|
---|
635 |
|
---|
636 | # elif defined(RT_ARCH_X86)
|
---|
637 | int rc = VINF_SUCCESS;
|
---|
638 | __asm
|
---|
639 | {
|
---|
640 | push dword ptr [HCPhysVmcs + 4]
|
---|
641 | push dword ptr [HCPhysVmcs]
|
---|
642 | _emit 0x0f
|
---|
643 | _emit 0xc7
|
---|
644 | _emit 0x34
|
---|
645 | _emit 0x24 /* VMPTRLD [esp] */
|
---|
646 | jnc success
|
---|
647 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_PTR
|
---|
648 | success:
|
---|
649 | add esp, 8
|
---|
650 | }
|
---|
651 | return rc;
|
---|
652 |
|
---|
653 | # else
|
---|
654 | # error "Shouldn't be here..."
|
---|
655 | # endif
|
---|
656 | }
|
---|
657 | #endif
|
---|
658 |
|
---|
659 |
|
---|
660 | /**
|
---|
661 | * Executes VMPTRST.
|
---|
662 | *
|
---|
663 | * @returns VBox status code.
|
---|
664 | * @param pHCPhysVmcs Where to store the physical address of the current
|
---|
665 | * VMCS.
|
---|
666 | */
|
---|
667 | DECLASM(int) VMXGetCurrentVmcs(RTHCPHYS *pHCPhysVmcs);
|
---|
668 |
|
---|
669 |
|
---|
670 | /**
|
---|
671 | * Executes VMWRITE for a 32-bit field.
|
---|
672 | *
|
---|
673 | * @returns VBox status code.
|
---|
674 | * @retval VINF_SUCCESS.
|
---|
675 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
676 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
677 | *
|
---|
678 | * @param uFieldEnc VMCS field encoding.
|
---|
679 | * @param u32Val The 32-bit value to set.
|
---|
680 | *
|
---|
681 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
682 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
683 | */
|
---|
684 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
|
---|
685 | DECLASM(int) VMXWriteVmcs32(uint32_t uFieldEnc, uint32_t u32Val);
|
---|
686 | #else
|
---|
687 | DECLINLINE(int) VMXWriteVmcs32(uint32_t uFieldEnc, uint32_t u32Val)
|
---|
688 | {
|
---|
689 | # if VMX_USE_MSC_INTRINSICS
|
---|
690 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
691 | __vmx_vmwrite(uFieldEnc, u32Val);
|
---|
692 | return VINF_SUCCESS;
|
---|
693 | # else
|
---|
694 | unsigned char rcMsc = __vmx_vmwrite(uFieldEnc, u32Val);
|
---|
695 | if (RT_LIKELY(rcMsc == 0))
|
---|
696 | return VINF_SUCCESS;
|
---|
697 | return rcMsc == 2 ? VERR_VMX_INVALID_VMCS_PTR : VERR_VMX_INVALID_VMCS_FIELD;
|
---|
698 | # endif
|
---|
699 |
|
---|
700 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
701 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
702 | __asm__ __volatile__ (
|
---|
703 | ".byte 0x0f, 0x79, 0xc2 # VMWRITE eax, edx \n\t"
|
---|
704 | :
|
---|
705 | :"a"(uFieldEnc),
|
---|
706 | "d"(u32Val)
|
---|
707 | );
|
---|
708 | return VINF_SUCCESS;
|
---|
709 | # else
|
---|
710 | int rc;
|
---|
711 | __asm__ __volatile__ (
|
---|
712 | ".byte 0x0f, 0x79, 0xc2 # VMWRITE eax, edx \n\t"
|
---|
713 | "ja 2f \n\t"
|
---|
714 | "je 1f \n\t"
|
---|
715 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
716 | "jmp 2f \n\t"
|
---|
717 | "1: \n\t"
|
---|
718 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_FIELD)", %0 \n\t"
|
---|
719 | "2: \n\t"
|
---|
720 | :"=rm"(rc)
|
---|
721 | :"0"(VINF_SUCCESS),
|
---|
722 | "a"(uFieldEnc),
|
---|
723 | "d"(u32Val)
|
---|
724 | );
|
---|
725 | return rc;
|
---|
726 | # endif
|
---|
727 |
|
---|
728 | # elif defined(RT_ARCH_X86)
|
---|
729 | int rc = VINF_SUCCESS;
|
---|
730 | __asm
|
---|
731 | {
|
---|
732 | push dword ptr [u32Val]
|
---|
733 | mov eax, [uFieldEnc]
|
---|
734 | _emit 0x0f
|
---|
735 | _emit 0x79
|
---|
736 | _emit 0x04
|
---|
737 | _emit 0x24 /* VMWRITE eax, [esp] */
|
---|
738 | jnc valid_vmcs
|
---|
739 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_PTR
|
---|
740 | jmp the_end
|
---|
741 | valid_vmcs:
|
---|
742 | jnz the_end
|
---|
743 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_FIELD
|
---|
744 | the_end:
|
---|
745 | add esp, 4
|
---|
746 | }
|
---|
747 | return rc;
|
---|
748 |
|
---|
749 | # else
|
---|
750 | # error "Shouldn't be here..."
|
---|
751 | # endif
|
---|
752 | }
|
---|
753 | #endif
|
---|
754 |
|
---|
755 |
|
---|
756 | /**
|
---|
757 | * Executes VMWRITE for a 64-bit field.
|
---|
758 | *
|
---|
759 | * @returns VBox status code.
|
---|
760 | * @retval VINF_SUCCESS.
|
---|
761 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
762 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
763 | *
|
---|
764 | * @param uFieldEnc The VMCS field encoding.
|
---|
765 | * @param u64Val The 16, 32 or 64-bit value to set.
|
---|
766 | *
|
---|
767 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
768 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
769 | */
|
---|
770 | #if defined(RT_ARCH_X86) || (RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS)
|
---|
771 | DECLASM(int) VMXWriteVmcs64(uint32_t uFieldEnc, uint64_t u64Val);
|
---|
772 | #else
|
---|
773 | DECLINLINE(int) VMXWriteVmcs64(uint32_t uFieldEnc, uint64_t u64Val)
|
---|
774 | {
|
---|
775 | # if VMX_USE_MSC_INTRINSICS
|
---|
776 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
777 | __vmx_vmwrite(uFieldEnc, u64Val);
|
---|
778 | return VINF_SUCCESS;
|
---|
779 | # else
|
---|
780 | unsigned char rcMsc = __vmx_vmwrite(uFieldEnc, u64Val);
|
---|
781 | if (RT_LIKELY(rcMsc == 0))
|
---|
782 | return VINF_SUCCESS;
|
---|
783 | return rcMsc == 2 ? VERR_VMX_INVALID_VMCS_PTR : VERR_VMX_INVALID_VMCS_FIELD;
|
---|
784 | # endif
|
---|
785 |
|
---|
786 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
787 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
788 | __asm__ __volatile__ (
|
---|
789 | ".byte 0x0f, 0x79, 0xc2 # VMWRITE eax, edx \n\t"
|
---|
790 | :
|
---|
791 | :"a"(uFieldEnc),
|
---|
792 | "d"(u64Val)
|
---|
793 | );
|
---|
794 | return VINF_SUCCESS;
|
---|
795 | # else
|
---|
796 | int rc;
|
---|
797 | __asm__ __volatile__ (
|
---|
798 | ".byte 0x0f, 0x79, 0xc2 # VMWRITE eax, edx \n\t"
|
---|
799 | "ja 2f \n\t"
|
---|
800 | "je 1f \n\t"
|
---|
801 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
802 | "jmp 2f \n\t"
|
---|
803 | "1: \n\t"
|
---|
804 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_FIELD)", %0 \n\t"
|
---|
805 | "2: \n\t"
|
---|
806 | :"=rm"(rc)
|
---|
807 | :"0"(VINF_SUCCESS),
|
---|
808 | "a"(uFieldEnc),
|
---|
809 | "d"(u64Val)
|
---|
810 | );
|
---|
811 | return rc;
|
---|
812 | # endif
|
---|
813 |
|
---|
814 | # else
|
---|
815 | # error "Shouldn't be here..."
|
---|
816 | # endif
|
---|
817 | }
|
---|
818 | #endif
|
---|
819 |
|
---|
820 |
|
---|
821 | /**
|
---|
822 | * Executes VMWRITE for a 16-bit VMCS field.
|
---|
823 | *
|
---|
824 | * @returns VBox status code.
|
---|
825 | * @retval VINF_SUCCESS.
|
---|
826 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
827 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
828 | *
|
---|
829 | * @param uVmcsField The VMCS field.
|
---|
830 | * @param u16Val The 16-bit value to set.
|
---|
831 | *
|
---|
832 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
833 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
834 | */
|
---|
835 | DECLINLINE(int) VMXWriteVmcs16(uint32_t uVmcsField, uint16_t u16Val)
|
---|
836 | {
|
---|
837 | AssertMsg(RT_BF_GET(uVmcsField, VMX_BF_VMCSFIELD_WIDTH) == VMX_VMCSFIELD_WIDTH_16BIT, ("%#RX32\n", uVmcsField));
|
---|
838 | return VMXWriteVmcs32(uVmcsField, u16Val);
|
---|
839 | }
|
---|
840 |
|
---|
841 |
|
---|
842 | /**
|
---|
843 | * Executes VMWRITE for a natural-width VMCS field.
|
---|
844 | */
|
---|
845 | #ifdef RT_ARCH_AMD64
|
---|
846 | # define VMXWriteVmcsNw VMXWriteVmcs64
|
---|
847 | #else
|
---|
848 | # define VMXWriteVmcsNw VMXWriteVmcs32
|
---|
849 | #endif
|
---|
850 |
|
---|
851 |
|
---|
852 | /**
|
---|
853 | * Invalidate a page using INVEPT.
|
---|
854 | *
|
---|
855 | * @returns VBox status code.
|
---|
856 | * @param enmFlush Type of flush.
|
---|
857 | * @param pDescriptor Pointer to the descriptor.
|
---|
858 | */
|
---|
859 | DECLASM(int) VMXR0InvEPT(VMXTLBFLUSHEPT enmFlush, uint64_t *pDescriptor);
|
---|
860 |
|
---|
861 |
|
---|
862 | /**
|
---|
863 | * Invalidate a page using INVVPID.
|
---|
864 | *
|
---|
865 | * @returns VBox status code.
|
---|
866 | * @param enmFlush Type of flush.
|
---|
867 | * @param pDescriptor Pointer to the descriptor.
|
---|
868 | */
|
---|
869 | DECLASM(int) VMXR0InvVPID(VMXTLBFLUSHVPID enmFlush, uint64_t *pDescriptor);
|
---|
870 |
|
---|
871 |
|
---|
872 | /**
|
---|
873 | * Executes VMREAD for a 32-bit field.
|
---|
874 | *
|
---|
875 | * @returns VBox status code.
|
---|
876 | * @retval VINF_SUCCESS.
|
---|
877 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
878 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
879 | *
|
---|
880 | * @param uFieldEnc The VMCS field encoding.
|
---|
881 | * @param pData Where to store VMCS field value.
|
---|
882 | *
|
---|
883 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
884 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
885 | */
|
---|
886 | #if RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS
|
---|
887 | DECLASM(int) VMXReadVmcs32(uint32_t uFieldEnc, uint32_t *pData);
|
---|
888 | #else
|
---|
889 | DECLINLINE(int) VMXReadVmcs32(uint32_t uFieldEnc, uint32_t *pData)
|
---|
890 | {
|
---|
891 | # if VMX_USE_MSC_INTRINSICS
|
---|
892 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
893 | uint64_t u64Tmp = 0;
|
---|
894 | __vmx_vmread(uFieldEnc, &u64Tmp);
|
---|
895 | *pData = (uint32_t)u64Tmp;
|
---|
896 | return VINF_SUCCESS;
|
---|
897 | # else
|
---|
898 | unsigned char rcMsc;
|
---|
899 | uint64_t u64Tmp;
|
---|
900 | rcMsc = __vmx_vmread(uFieldEnc, &u64Tmp);
|
---|
901 | *pData = (uint32_t)u64Tmp;
|
---|
902 | if (RT_LIKELY(rcMsc == 0))
|
---|
903 | return VINF_SUCCESS;
|
---|
904 | return rcMsc == 2 ? VERR_VMX_INVALID_VMCS_PTR : VERR_VMX_INVALID_VMCS_FIELD;
|
---|
905 | # endif
|
---|
906 |
|
---|
907 | # elif VMX_USE_GNU_STYLE_INLINE_VMX_INSTRUCTIONS
|
---|
908 | RTCCUINTREG uTmp = 0;
|
---|
909 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
910 | __asm__ __volatile__("vmread %[uField],%[uDst]"
|
---|
911 | : [uDst] "=mr" (uTmp)
|
---|
912 | : [uField] "r" ((RTCCUINTREG)uFieldEnc));
|
---|
913 | *pData = (uint32_t)uTmp;
|
---|
914 | return VINF_SUCCESS;
|
---|
915 | # else
|
---|
916 | #if 0
|
---|
917 | int rc;
|
---|
918 | __asm__ __volatile__("vmread %[uField],%[uDst]\n\t"
|
---|
919 | "movl %[rcSuccess],%[rc]\n\t"
|
---|
920 | # if VMX_USE_GNU_STYLE_INLINE_SECTION_TRICK
|
---|
921 | "jna 1f\n\t"
|
---|
922 | ".section .text.vmread_failures, \"ax?\"\n\t"
|
---|
923 | "1:\n\t"
|
---|
924 | "movl %[rcInvalidVmcsPtr],%[rc]\n\t"
|
---|
925 | "jnz 2f\n\t"
|
---|
926 | "movl %[rcInvalidVmcsField],%[rc]\n\t"
|
---|
927 | "2:\n\t"
|
---|
928 | "jmp 3f\n\t"
|
---|
929 | ".previous\n\t"
|
---|
930 | "3:\n\t"
|
---|
931 | # else
|
---|
932 | "ja 1f\n\t"
|
---|
933 | "movl %[rcInvalidVmcsPtr],%[rc]\n\t"
|
---|
934 | "jnz 1f\n\t"
|
---|
935 | "movl %[rcInvalidVmcsField],%[rc]\n\t"
|
---|
936 | "1:\n\t"
|
---|
937 | # endif
|
---|
938 | : [uDst] "=mr" (uTmp)
|
---|
939 | , [rc] "=r" (rc)
|
---|
940 | : [uField] "r" ((RTCCUINTREG)uFieldEnc)
|
---|
941 | , [rcSuccess] "i" (VINF_SUCCESS)
|
---|
942 | , [rcInvalidVmcsPtr] "i" (VERR_VMX_INVALID_VMCS_PTR)
|
---|
943 | , [rcInvalidVmcsField] "i" (VERR_VMX_INVALID_VMCS_FIELD));
|
---|
944 | *pData = uTmp;
|
---|
945 | return rc;
|
---|
946 | #else
|
---|
947 | int fSuccess, fFieldError;
|
---|
948 | __asm__ __volatile__("vmread %[uField],%[uDst]"
|
---|
949 | : [uDst] "=mr" (uTmp)
|
---|
950 | , "=@cca" (fSuccess)
|
---|
951 | , "=@ccnc" (fFieldError)
|
---|
952 | : [uField] "r" ((RTCCUINTREG)uFieldEnc));
|
---|
953 | *pData = uTmp;
|
---|
954 | return RT_LIKELY(fSuccess) ? VINF_SUCCESS : fFieldError ? VERR_VMX_INVALID_VMCS_FIELD : VERR_VMX_INVALID_VMCS_PTR;
|
---|
955 | #endif
|
---|
956 | # endif
|
---|
957 |
|
---|
958 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
959 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
960 | __asm__ __volatile__ (
|
---|
961 | ".byte 0x0f, 0x78, 0xc2 # VMREAD eax, edx \n\t"
|
---|
962 | :"=d"(*pData)
|
---|
963 | :"a"(uFieldEnc),
|
---|
964 | "d"(0)
|
---|
965 | );
|
---|
966 | return VINF_SUCCESS;
|
---|
967 | # else
|
---|
968 | int rc;
|
---|
969 | __asm__ __volatile__ (
|
---|
970 | "movl $" RT_XSTR(VINF_SUCCESS)", %0 \n\t"
|
---|
971 | ".byte 0x0f, 0x78, 0xc2 # VMREAD eax, edx \n\t"
|
---|
972 | "ja 2f \n\t"
|
---|
973 | "je 1f \n\t"
|
---|
974 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
975 | "jmp 2f \n\t"
|
---|
976 | "1: \n\t"
|
---|
977 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_FIELD)", %0 \n\t"
|
---|
978 | "2: \n\t"
|
---|
979 | :"=&r"(rc),
|
---|
980 | "=d"(*pData)
|
---|
981 | :"a"(uFieldEnc),
|
---|
982 | "d"(0)
|
---|
983 | );
|
---|
984 | return rc;
|
---|
985 | # endif
|
---|
986 |
|
---|
987 | # elif defined(RT_ARCH_X86)
|
---|
988 | int rc = VINF_SUCCESS;
|
---|
989 | __asm
|
---|
990 | {
|
---|
991 | sub esp, 4
|
---|
992 | mov dword ptr [esp], 0
|
---|
993 | mov eax, [uFieldEnc]
|
---|
994 | _emit 0x0f
|
---|
995 | _emit 0x78
|
---|
996 | _emit 0x04
|
---|
997 | _emit 0x24 /* VMREAD eax, [esp] */
|
---|
998 | mov edx, pData
|
---|
999 | pop dword ptr [edx]
|
---|
1000 | jnc valid_vmcs
|
---|
1001 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_PTR
|
---|
1002 | jmp the_end
|
---|
1003 | valid_vmcs:
|
---|
1004 | jnz the_end
|
---|
1005 | mov dword ptr [rc], VERR_VMX_INVALID_VMCS_FIELD
|
---|
1006 | the_end:
|
---|
1007 | }
|
---|
1008 | return rc;
|
---|
1009 |
|
---|
1010 | # else
|
---|
1011 | # error "Shouldn't be here..."
|
---|
1012 | # endif
|
---|
1013 | }
|
---|
1014 | #endif
|
---|
1015 |
|
---|
1016 |
|
---|
1017 | /**
|
---|
1018 | * Executes VMREAD for a 64-bit field.
|
---|
1019 | *
|
---|
1020 | * @returns VBox status code.
|
---|
1021 | * @retval VINF_SUCCESS.
|
---|
1022 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
1023 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
1024 | *
|
---|
1025 | * @param uFieldEnc The VMCS field encoding.
|
---|
1026 | * @param pData Where to store VMCS field value.
|
---|
1027 | *
|
---|
1028 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
1029 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
1030 | */
|
---|
1031 | #if defined(RT_ARCH_X86) || (RT_INLINE_ASM_EXTERNAL && !VMX_USE_MSC_INTRINSICS)
|
---|
1032 | DECLASM(int) VMXReadVmcs64(uint32_t uFieldEnc, uint64_t *pData);
|
---|
1033 | #else
|
---|
1034 | DECLINLINE(int) VMXReadVmcs64(uint32_t uFieldEnc, uint64_t *pData)
|
---|
1035 | {
|
---|
1036 | # if VMX_USE_MSC_INTRINSICS
|
---|
1037 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
1038 | __vmx_vmread(uFieldEnc, pData);
|
---|
1039 | return VINF_SUCCESS;
|
---|
1040 | # else
|
---|
1041 | unsigned char rcMsc;
|
---|
1042 | rcMsc = __vmx_vmread(uFieldEnc, pData);
|
---|
1043 | if (RT_LIKELY(rcMsc == 0))
|
---|
1044 | return VINF_SUCCESS;
|
---|
1045 | return rcMsc == 2 ? VERR_VMX_INVALID_VMCS_PTR : VERR_VMX_INVALID_VMCS_FIELD;
|
---|
1046 | # endif
|
---|
1047 |
|
---|
1048 | # elif VMX_USE_GNU_STYLE_INLINE_VMX_INSTRUCTIONS
|
---|
1049 | uint64_t uTmp = 0;
|
---|
1050 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
1051 | __asm__ __volatile__("vmreadq %[uField],%[uDst]"
|
---|
1052 | : [uDst] "=m" (uTmp)
|
---|
1053 | : [uField] "r" ((uint64_t)uFieldEnc));
|
---|
1054 | *pData = uTmp;
|
---|
1055 | return VINF_SUCCESS;
|
---|
1056 | # elif 0
|
---|
1057 | int rc;
|
---|
1058 | __asm__ __volatile__("vmreadq %[uField],%[uDst]\n\t"
|
---|
1059 | "movl %[rcSuccess],%[rc]\n\t"
|
---|
1060 | # if VMX_USE_GNU_STYLE_INLINE_SECTION_TRICK
|
---|
1061 | "jna 1f\n\t"
|
---|
1062 | ".section .text.vmread_failures, \"ax?\"\n\t"
|
---|
1063 | "1:\n\t"
|
---|
1064 | "movl %[rcInvalidVmcsPtr],%[rc]\n\t"
|
---|
1065 | "jnz 2f\n\t"
|
---|
1066 | "movl %[rcInvalidVmcsField],%[rc]\n\t"
|
---|
1067 | "2:\n\t"
|
---|
1068 | "jmp 3f\n\t"
|
---|
1069 | ".previous\n\t"
|
---|
1070 | "3:\n\t"
|
---|
1071 | # else
|
---|
1072 | "ja 1f\n\t"
|
---|
1073 | "movl %[rcInvalidVmcsPtr],%[rc]\n\t"
|
---|
1074 | "jnz 1f\n\t"
|
---|
1075 | "movl %[rcInvalidVmcsField],%[rc]\n\t"
|
---|
1076 | "1:\n\t"
|
---|
1077 | # endif
|
---|
1078 | : [uDst] "=mr" (uTmp)
|
---|
1079 | , [rc] "=r" (rc)
|
---|
1080 | : [uField] "r" ((uint64_t)uFieldEnc)
|
---|
1081 | , [rcSuccess] "i" (VINF_SUCCESS)
|
---|
1082 | , [rcInvalidVmcsPtr] "i" (VERR_VMX_INVALID_VMCS_PTR)
|
---|
1083 | , [rcInvalidVmcsField] "i" (VERR_VMX_INVALID_VMCS_FIELD)
|
---|
1084 | );
|
---|
1085 | *pData = uTmp;
|
---|
1086 | return rc;
|
---|
1087 | # else
|
---|
1088 | int fSuccess, fFieldError;
|
---|
1089 | __asm__ __volatile__("vmread %[uField],%[uDst]"
|
---|
1090 | : [uDst] "=mr" (uTmp)
|
---|
1091 | , "=@cca" (fSuccess)
|
---|
1092 | , "=@ccnc" (fFieldError)
|
---|
1093 | : [uField] "r" ((RTCCUINTREG)uFieldEnc));
|
---|
1094 | *pData = uTmp;
|
---|
1095 | return RT_LIKELY(fSuccess) ? VINF_SUCCESS : fFieldError ? VERR_VMX_INVALID_VMCS_FIELD : VERR_VMX_INVALID_VMCS_PTR;
|
---|
1096 | # endif
|
---|
1097 |
|
---|
1098 | # elif RT_INLINE_ASM_GNU_STYLE
|
---|
1099 | # ifdef VBOX_WITH_VMREAD_VMWRITE_NOCHECK
|
---|
1100 | __asm__ __volatile__ (
|
---|
1101 | ".byte 0x0f, 0x78, 0xc2 # VMREAD eax, edx \n\t"
|
---|
1102 | :"=d"(*pData)
|
---|
1103 | :"a"(uFieldEnc),
|
---|
1104 | "d"(0)
|
---|
1105 | );
|
---|
1106 | return VINF_SUCCESS;
|
---|
1107 | # else
|
---|
1108 | int rc;
|
---|
1109 | __asm__ __volatile__ (
|
---|
1110 | "movl $" RT_XSTR(VINF_SUCCESS)", %0 \n\t"
|
---|
1111 | ".byte 0x0f, 0x78, 0xc2 # VMREAD eax, edx \n\t"
|
---|
1112 | "ja 2f \n\t"
|
---|
1113 | "je 1f \n\t"
|
---|
1114 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_PTR)", %0 \n\t"
|
---|
1115 | "jmp 2f \n\t"
|
---|
1116 | "1: \n\t"
|
---|
1117 | "movl $" RT_XSTR(VERR_VMX_INVALID_VMCS_FIELD)", %0 \n\t"
|
---|
1118 | "2: \n\t"
|
---|
1119 | :"=&r"(rc),
|
---|
1120 | "=d"(*pData)
|
---|
1121 | :"a"(uFieldEnc),
|
---|
1122 | "d"(0)
|
---|
1123 | );
|
---|
1124 | return rc;
|
---|
1125 | # endif
|
---|
1126 |
|
---|
1127 | # else
|
---|
1128 | # error "Shouldn't be here..."
|
---|
1129 | # endif
|
---|
1130 | }
|
---|
1131 | #endif
|
---|
1132 |
|
---|
1133 |
|
---|
1134 | /**
|
---|
1135 | * Executes VMREAD for a 16-bit field.
|
---|
1136 | *
|
---|
1137 | * @returns VBox status code.
|
---|
1138 | * @retval VINF_SUCCESS.
|
---|
1139 | * @retval VERR_VMX_INVALID_VMCS_PTR.
|
---|
1140 | * @retval VERR_VMX_INVALID_VMCS_FIELD.
|
---|
1141 | *
|
---|
1142 | * @param uVmcsField The VMCS field.
|
---|
1143 | * @param pData Where to store VMCS field value.
|
---|
1144 | *
|
---|
1145 | * @remarks The values of the two status codes can be OR'ed together, the result
|
---|
1146 | * will be VERR_VMX_INVALID_VMCS_PTR.
|
---|
1147 | */
|
---|
1148 | DECLINLINE(int) VMXReadVmcs16(uint32_t uVmcsField, uint16_t *pData)
|
---|
1149 | {
|
---|
1150 | uint32_t u32Tmp;
|
---|
1151 | int rc;
|
---|
1152 | AssertMsg(RT_BF_GET(uVmcsField, VMX_BF_VMCSFIELD_WIDTH) == VMX_VMCSFIELD_WIDTH_16BIT, ("%#RX32\n", uVmcsField));
|
---|
1153 | rc = VMXReadVmcs32(uVmcsField, &u32Tmp);
|
---|
1154 | *pData = (uint16_t)u32Tmp;
|
---|
1155 | return rc;
|
---|
1156 | }
|
---|
1157 |
|
---|
1158 |
|
---|
1159 | /**
|
---|
1160 | * Executes VMREAD for a natural-width VMCS field.
|
---|
1161 | */
|
---|
1162 | #ifdef RT_ARCH_AMD64
|
---|
1163 | # define VMXReadVmcsNw VMXReadVmcs64
|
---|
1164 | #else
|
---|
1165 | # define VMXReadVmcsNw VMXReadVmcs32
|
---|
1166 | #endif
|
---|
1167 |
|
---|
1168 | #endif /* RT_ARCH_AMD64 || RT_ARCH_X86 */
|
---|
1169 |
|
---|
1170 | /** @} */
|
---|
1171 |
|
---|
1172 | #endif /* !VBOX_INCLUDED_vmm_hmvmxinline_h */
|
---|
1173 |
|
---|