1 | ; $Id: HWACCMR0Mixed.mac 22079 2009-08-07 16:26:25Z vboxsync $
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2 | ;; @file
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3 | ; HWACCMR0Mixed.mac - Stuff that darwin needs to build two versions of.
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4 | ;
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5 | ; Included by HWACCMR0A.asm with RT_ARCH_AMD64 defined or or undefined.
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6 | ;
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7 |
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8 | ;
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9 | ; Copyright (C) 2006-2007 Sun Microsystems, Inc.
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10 | ;
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11 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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12 | ; available from http://www.virtualbox.org. This file is free software;
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13 | ; you can redistribute it and/or modify it under the terms of the GNU
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14 | ; General Public License (GPL) as published by the Free Software
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15 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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16 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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17 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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18 | ;
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19 | ; Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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20 | ; Clara, CA 95054 USA or visit http://www.sun.com if you need
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21 | ; additional information or have any questions.
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22 | ;
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23 |
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24 |
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25 | ;/**
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26 | ; * Prepares for and executes VMLAUNCH/VMRESUME (32 bits guest mode)
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27 | ; *
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28 | ; * @returns VBox status code
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29 | ; * @param fResume x86:[ebp+8], msc:rcx,gcc:rdi vmlauch/vmresume
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30 | ; * @param pCtx x86:[ebp+c], msc:rdx,gcc:rsi Guest context
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31 | ; * @param pCache x86:[esp+10],msc:r8, gcc:rdx VMCS cache
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32 | ; */
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33 | ALIGNCODE(16)
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34 | BEGINPROC MY_NAME(VMXR0StartVM32)
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35 | push xBP
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36 | mov xBP, xSP
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37 |
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38 | pushf
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39 | cli
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40 |
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41 | ;/* Save all general purpose host registers. */
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42 | MYPUSHAD
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43 |
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44 | ;/* First we have to save some final CPU context registers. */
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45 | mov eax, VMX_VMCS_HOST_RIP
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46 | %ifdef RT_ARCH_AMD64
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47 | lea r10, [.vmlaunch_done wrt rip]
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48 | vmwrite rax, r10
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49 | %else
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50 | mov ecx, .vmlaunch_done
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51 | vmwrite eax, ecx
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52 | %endif
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53 | ;/* Note: assumes success... */
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54 |
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55 | ;/* Manual save and restore:
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56 | ; * - General purpose registers except RIP, RSP
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57 | ; *
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58 | ; * Trashed:
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59 | ; * - CR2 (we don't care)
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60 | ; * - LDTR (reset to 0)
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61 | ; * - DRx (presumably not changed at all)
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62 | ; * - DR7 (reset to 0x400)
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63 | ; * - EFLAGS (reset to RT_BIT(1); not relevant)
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64 | ; *
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65 | ; */
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66 |
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67 | ;/* Save the Guest CPU context pointer. */
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68 | %ifdef RT_ARCH_AMD64
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69 | %ifdef ASM_CALL64_GCC
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70 | ; fResume already in rdi
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71 | ; pCtx already in rsi
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72 | mov rbx, rdx ; pCache
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73 | %else
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74 | mov rdi, rcx ; fResume
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75 | mov rsi, rdx ; pCtx
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76 | mov rbx, r8 ; pCache
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77 | %endif
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78 | %else
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79 | mov edi, [ebp + 8] ; fResume
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80 | mov esi, [ebp + 12] ; pCtx
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81 | mov ebx, [ebp + 16] ; pCache
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82 | %endif
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83 |
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84 | ;/* Save segment registers */
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85 | ; Note: MYPUSHSEGS trashes rdx & rcx, so we moved it here (msvc amd64 case)
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86 | MYPUSHSEGS xAX, ax
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87 |
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88 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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89 | mov ecx, [xBX + VMCSCACHE.Write.cValidEntries]
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90 | cmp ecx, 0
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91 | je .no_cached_writes
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92 | mov edx, ecx
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93 | mov ecx, 0
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94 | jmp .cached_write
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95 |
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96 | ALIGN(16)
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97 | .cached_write:
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98 | mov eax, [xBX + VMCSCACHE.Write.aField + xCX*4]
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99 | vmwrite xAX, [xBX + VMCSCACHE.Write.aFieldVal + xCX*8]
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100 | inc xCX
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101 | cmp xCX, xDX
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102 | jl .cached_write
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103 |
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104 | mov dword [xBX + VMCSCACHE.Write.cValidEntries], 0
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105 | .no_cached_writes:
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106 |
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107 | ; Save the pCache pointer
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108 | push xBX
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109 | %endif
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110 |
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111 | ; Save the pCtx pointer
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112 | push xSI
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113 |
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114 | ; Save LDTR
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115 | xor eax, eax
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116 | sldt ax
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117 | push xAX
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118 |
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119 | ; The TR limit is reset to 0x67; restore it manually
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120 | str eax
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121 | push xAX
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122 |
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123 | ; VMX only saves the base of the GDTR & IDTR and resets the limit to 0xffff; we must restore the limit correctly!
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124 | sub xSP, xS*2
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125 | sgdt [xSP]
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126 |
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127 | sub xSP, xS*2
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128 | sidt [xSP]
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129 |
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130 | %ifdef VBOX_WITH_DR6_EXPERIMENT
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131 | ; Restore DR6 - experiment, not safe!
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132 | mov xBX, [xSI + CPUMCTX.dr6]
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133 | mov dr6, xBX
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134 | %endif
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135 |
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136 | ; Restore CR2
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137 | mov ebx, [xSI + CPUMCTX.cr2]
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138 | mov cr2, xBX
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139 |
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140 | mov eax, VMX_VMCS_HOST_RSP
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141 | vmwrite xAX, xSP
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142 | ;/* Note: assumes success... */
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143 | ;/* Don't mess with ESP anymore!! */
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144 |
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145 | ;/* Restore Guest's general purpose registers. */
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146 | mov eax, [xSI + CPUMCTX.eax]
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147 | mov ebx, [xSI + CPUMCTX.ebx]
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148 | mov ecx, [xSI + CPUMCTX.ecx]
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149 | mov edx, [xSI + CPUMCTX.edx]
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150 | mov ebp, [xSI + CPUMCTX.ebp]
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151 |
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152 | ; resume or start?
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153 | cmp xDI, 0 ; fResume
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154 | je .vmlauch_lauch
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155 |
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156 | ;/* Restore edi & esi. */
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157 | mov edi, [xSI + CPUMCTX.edi]
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158 | mov esi, [xSI + CPUMCTX.esi]
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159 |
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160 | vmresume
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161 | jmp .vmlaunch_done; ;/* here if vmresume detected a failure. */
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162 |
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163 | .vmlauch_lauch:
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164 | ;/* Restore edi & esi. */
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165 | mov edi, [xSI + CPUMCTX.edi]
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166 | mov esi, [xSI + CPUMCTX.esi]
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167 |
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168 | vmlaunch
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169 | jmp .vmlaunch_done; ;/* here if vmlaunch detected a failure. */
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170 |
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171 | ALIGNCODE(16) ;; @todo YASM BUG - this alignment is wrong on darwin, it's 1 byte off.
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172 | .vmlaunch_done:
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173 | jc near .vmxstart_invalid_vmxon_ptr
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174 | jz near .vmxstart_start_failed
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175 |
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176 | ; Restore base and limit of the IDTR & GDTR
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177 | lidt [xSP]
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178 | add xSP, xS*2
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179 | lgdt [xSP]
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180 | add xSP, xS*2
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181 |
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182 | push xDI
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183 | mov xDI, [xSP + xS * 3] ; pCtx (*3 to skip the saved LDTR + TR)
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184 |
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185 | mov [ss:xDI + CPUMCTX.eax], eax
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186 | mov [ss:xDI + CPUMCTX.ebx], ebx
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187 | mov [ss:xDI + CPUMCTX.ecx], ecx
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188 | mov [ss:xDI + CPUMCTX.edx], edx
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189 | mov [ss:xDI + CPUMCTX.esi], esi
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190 | mov [ss:xDI + CPUMCTX.ebp], ebp
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191 | %ifdef RT_ARCH_AMD64
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192 | pop xAX ; the guest edi we pushed above
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193 | mov dword [ss:xDI + CPUMCTX.edi], eax
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194 | %else
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195 | pop dword [ss:xDI + CPUMCTX.edi] ; the guest edi we pushed above
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196 | %endif
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197 |
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198 | %ifdef VBOX_WITH_DR6_EXPERIMENT
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199 | ; Save DR6 - experiment, not safe!
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200 | mov xAX, dr6
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201 | mov [ss:xDI + CPUMCTX.dr6], xAX
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202 | %endif
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203 |
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204 | ; Restore TSS selector; must mark it as not busy before using ltr (!)
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205 | ; ASSUME that this is supposed to be 'BUSY'. (saves 20-30 ticks on the T42p)
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206 | ; @todo get rid of sgdt
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207 | pop xBX ; saved TR
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208 | %ifndef RT_ARCH_AMD64
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209 | sub xSP, xS*2
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210 | sgdt [xSP]
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211 | mov eax, ebx
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212 | and al, 0F8h ; mask away TI and RPL bits, get descriptor offset.
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213 | add xAX, [xSP + 2] ; eax <- GDTR.address + descriptor offset.
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214 | and dword [ss:xAX + 4], ~0200h ; clear busy flag (2nd type2 bit)
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215 | ltr bx
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216 | add xSP, xS*2
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217 | %endif
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218 |
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219 | pop xAX ; saved LDTR
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220 | lldt ax
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221 |
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222 | add xSP, xS ; pCtx
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223 |
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224 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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225 | pop xDX ; saved pCache
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226 |
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227 | mov ecx, [ss:xDX + VMCSCACHE.Read.cValidEntries]
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228 | cmp ecx, 0 ; can't happen
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229 | je .no_cached_reads
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230 | jmp .cached_read
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231 |
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232 | ALIGN(16)
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233 | .cached_read:
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234 | dec xCX
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235 | mov eax, [ss:xDX + VMCSCACHE.Read.aField + xCX*4]
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236 | vmread [ss:xDX + VMCSCACHE.Read.aFieldVal + xCX*8], xAX
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237 | cmp xCX, 0
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238 | jnz .cached_read
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239 | .no_cached_reads:
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240 |
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241 | ; Save CR2 for EPT
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242 | mov xAX, cr2
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243 | mov [ss:xDX + VMCSCACHE.cr2], xAX
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244 | %endif
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245 |
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246 | ; Restore segment registers
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247 | MYPOPSEGS xAX, ax
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248 |
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249 | ; Restore general purpose registers
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250 | MYPOPAD
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251 |
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252 | mov eax, VINF_SUCCESS
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253 |
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254 | .vmstart_end:
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255 | popf
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256 | pop xBP
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257 | ret
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258 |
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259 |
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260 | .vmxstart_invalid_vmxon_ptr:
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261 | ; Restore base and limit of the IDTR & GDTR
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262 | lidt [xSP]
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263 | add xSP, xS*2
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264 | lgdt [xSP]
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265 | add xSP, xS*2
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266 |
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267 | ; Restore TSS selector; must mark it as not busy before using ltr (!)
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268 | ; ASSUME that this is supposed to be 'BUSY'. (saves 20-30 ticks on the T42p)
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269 | ; @todo get rid of sgdt
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270 | pop xBX ; saved TR
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271 | %ifndef RT_ARCH_AMD64
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272 | sub xSP, xS*2
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273 | sgdt [xSP]
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274 | mov eax, ebx
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275 | and al, 0F8h ; mask away TI and RPL bits, get descriptor offset.
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276 | add eax, [xSP + 2] ; eax <- GDTR.address + descriptor offset.
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277 | and dword [ss:eax + 4], ~0200h ; clear busy flag (2nd type2 bit)
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278 | ltr bx
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279 | add xSP, xS*2
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280 | %endif
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281 |
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282 | pop xAX ; saved LDTR
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283 | lldt ax
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284 |
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285 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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286 | add xSP, xS*2 ; pCtx + pCache
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287 | %else
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288 | add xSP, xS ; pCtx
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289 | %endif
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290 |
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291 | ; Restore segment registers
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292 | MYPOPSEGS xAX, ax
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293 |
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294 | ; Restore all general purpose host registers.
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295 | MYPOPAD
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296 | mov eax, VERR_VMX_INVALID_VMXON_PTR
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297 | jmp .vmstart_end
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298 |
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299 | .vmxstart_start_failed:
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300 | ; Restore base and limit of the IDTR & GDTR
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301 | lidt [xSP]
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302 | add xSP, xS*2
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303 | lgdt [xSP]
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304 | add xSP, xS*2
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305 |
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306 | ; Restore TSS selector; must mark it as not busy before using ltr (!)
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307 | ; ASSUME that this is supposed to be 'BUSY'. (saves 20-30 ticks on the T42p)
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308 | ; @todo get rid of sgdt
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309 | pop xBX ; saved TR
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310 | %ifndef RT_ARCH_AMD64
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311 | sub xSP, xS*2
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312 | sgdt [xSP]
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313 | mov eax, ebx
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314 | and al, 0F8h ; mask away TI and RPL bits, get descriptor offset.
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315 | add eax, [xSP + 2] ; eax <- GDTR.address + descriptor offset.
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316 | and dword [ss:eax + 4], ~0200h ; clear busy flag (2nd type2 bit)
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317 | ltr bx
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318 | add xSP, xS*2
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319 | %endif
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320 |
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321 | pop xAX ; saved LDTR
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322 | lldt ax
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323 |
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324 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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325 | add xSP, xS*2 ; pCtx + pCache
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326 | %else
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327 | add xSP, xS ; pCtx
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328 | %endif
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329 |
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330 | ; Restore segment registers
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331 | MYPOPSEGS xAX, ax
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332 |
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333 | ; Restore all general purpose host registers.
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334 | MYPOPAD
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335 | mov eax, VERR_VMX_UNABLE_TO_START_VM
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336 | jmp .vmstart_end
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337 |
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338 | ENDPROC MY_NAME(VMXR0StartVM32)
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339 |
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340 | %ifdef RT_ARCH_AMD64
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341 | ;/**
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342 | ; * Prepares for and executes VMLAUNCH/VMRESUME (64 bits guest mode)
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343 | ; *
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344 | ; * @returns VBox status code
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345 | ; * @param fResume msc:rcx, gcc:rdi vmlauch/vmresume
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346 | ; * @param pCtx msc:rdx, gcc:rsi Guest context
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347 | ; * @param pCache msc:r8, gcc:rdx VMCS cache
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348 | ; */
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349 | ALIGNCODE(16)
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350 | BEGINPROC MY_NAME(VMXR0StartVM64)
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351 | push xBP
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352 | mov xBP, xSP
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353 |
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354 | pushf
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355 | cli
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356 |
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357 | ;/* Save all general purpose host registers. */
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358 | MYPUSHAD
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359 |
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360 | ;/* First we have to save some final CPU context registers. */
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361 | lea r10, [.vmlaunch64_done wrt rip]
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362 | mov rax, VMX_VMCS_HOST_RIP ;/* return address (too difficult to continue after VMLAUNCH?) */
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363 | vmwrite rax, r10
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364 | ;/* Note: assumes success... */
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365 |
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366 | ;/* Manual save and restore:
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367 | ; * - General purpose registers except RIP, RSP
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368 | ; *
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369 | ; * Trashed:
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370 | ; * - CR2 (we don't care)
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371 | ; * - LDTR (reset to 0)
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372 | ; * - DRx (presumably not changed at all)
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373 | ; * - DR7 (reset to 0x400)
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374 | ; * - EFLAGS (reset to RT_BIT(1); not relevant)
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375 | ; *
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376 | ; */
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377 |
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378 | ;/* Save the Guest CPU context pointer. */
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379 | %ifdef ASM_CALL64_GCC
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380 | ; fResume already in rdi
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381 | ; pCtx already in rsi
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382 | mov rbx, rdx ; pCache
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383 | %else
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384 | mov rdi, rcx ; fResume
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385 | mov rsi, rdx ; pCtx
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386 | mov rbx, r8 ; pCache
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387 | %endif
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388 |
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389 | ;/* Save segment registers */
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390 | ; Note: MYPUSHSEGS trashes rdx & rcx, so we moved it here (msvc amd64 case)
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391 | MYPUSHSEGS xAX, ax
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392 |
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393 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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394 | mov ecx, [xBX + VMCSCACHE.Write.cValidEntries]
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395 | cmp ecx, 0
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396 | je .no_cached_writes
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397 | mov edx, ecx
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398 | mov ecx, 0
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399 | jmp .cached_write
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400 |
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401 | ALIGN(16)
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402 | .cached_write:
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403 | mov eax, [xBX + VMCSCACHE.Write.aField + xCX*4]
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404 | vmwrite xAX, [xBX + VMCSCACHE.Write.aFieldVal + xCX*8]
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405 | inc xCX
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406 | cmp xCX, xDX
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407 | jl .cached_write
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408 |
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409 | mov dword [xBX + VMCSCACHE.Write.cValidEntries], 0
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410 | .no_cached_writes:
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411 |
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412 | ; Save the pCache pointer
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413 | push xBX
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414 | %endif
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415 |
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416 | ; Save the host LSTAR, CSTAR, SFMASK & KERNEL_GSBASE MSRs and restore the guest MSRs
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417 | ;; @todo use the automatic load feature for MSRs
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418 | LOADGUESTMSR MSR_K8_LSTAR, CPUMCTX.msrLSTAR
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419 | %if 0 ; not supported on Intel CPUs
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420 | LOADGUESTMSR MSR_K8_CSTAR, CPUMCTX.msrCSTAR
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421 | %endif
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422 | LOADGUESTMSR MSR_K6_STAR, CPUMCTX.msrSTAR
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423 | LOADGUESTMSR MSR_K8_SF_MASK, CPUMCTX.msrSFMASK
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424 | LOADGUESTMSR MSR_K8_KERNEL_GS_BASE, CPUMCTX.msrKERNELGSBASE
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425 |
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426 | ; Save the pCtx pointer
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427 | push xSI
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428 |
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429 | ; Save LDTR
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430 | xor eax, eax
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431 | sldt ax
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432 | push xAX
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433 |
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434 | ; VMX only saves the base of the GDTR & IDTR and resets the limit to 0xffff; we must restore the limit correctly!
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435 | sub xSP, xS*2
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436 | sgdt [xSP]
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437 |
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438 | sub xSP, xS*2
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439 | sidt [xSP]
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440 |
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441 | %ifdef VBOX_WITH_DR6_EXPERIMENT
|
---|
442 | ; Restore DR6 - experiment, not safe!
|
---|
443 | mov xBX, [xSI + CPUMCTX.dr6]
|
---|
444 | mov dr6, xBX
|
---|
445 | %endif
|
---|
446 |
|
---|
447 | ; Restore CR2
|
---|
448 | mov rbx, qword [xSI + CPUMCTX.cr2]
|
---|
449 | mov cr2, rbx
|
---|
450 |
|
---|
451 | mov eax, VMX_VMCS_HOST_RSP
|
---|
452 | vmwrite xAX, xSP
|
---|
453 | ;/* Note: assumes success... */
|
---|
454 | ;/* Don't mess with ESP anymore!! */
|
---|
455 |
|
---|
456 | ;/* Restore Guest's general purpose registers. */
|
---|
457 | mov rax, qword [xSI + CPUMCTX.eax]
|
---|
458 | mov rbx, qword [xSI + CPUMCTX.ebx]
|
---|
459 | mov rcx, qword [xSI + CPUMCTX.ecx]
|
---|
460 | mov rdx, qword [xSI + CPUMCTX.edx]
|
---|
461 | mov rbp, qword [xSI + CPUMCTX.ebp]
|
---|
462 | mov r8, qword [xSI + CPUMCTX.r8]
|
---|
463 | mov r9, qword [xSI + CPUMCTX.r9]
|
---|
464 | mov r10, qword [xSI + CPUMCTX.r10]
|
---|
465 | mov r11, qword [xSI + CPUMCTX.r11]
|
---|
466 | mov r12, qword [xSI + CPUMCTX.r12]
|
---|
467 | mov r13, qword [xSI + CPUMCTX.r13]
|
---|
468 | mov r14, qword [xSI + CPUMCTX.r14]
|
---|
469 | mov r15, qword [xSI + CPUMCTX.r15]
|
---|
470 |
|
---|
471 | ; resume or start?
|
---|
472 | cmp xDI, 0 ; fResume
|
---|
473 | je .vmlauch64_lauch
|
---|
474 |
|
---|
475 | ;/* Restore edi & esi. */
|
---|
476 | mov rdi, qword [xSI + CPUMCTX.edi]
|
---|
477 | mov rsi, qword [xSI + CPUMCTX.esi]
|
---|
478 |
|
---|
479 | vmresume
|
---|
480 | jmp .vmlaunch64_done; ;/* here if vmresume detected a failure. */
|
---|
481 |
|
---|
482 | .vmlauch64_lauch:
|
---|
483 | ;/* Restore rdi & rsi. */
|
---|
484 | mov rdi, qword [xSI + CPUMCTX.edi]
|
---|
485 | mov rsi, qword [xSI + CPUMCTX.esi]
|
---|
486 |
|
---|
487 | vmlaunch
|
---|
488 | jmp .vmlaunch64_done; ;/* here if vmlaunch detected a failure. */
|
---|
489 |
|
---|
490 | ALIGNCODE(16)
|
---|
491 | .vmlaunch64_done:
|
---|
492 | jc near .vmxstart64_invalid_vmxon_ptr
|
---|
493 | jz near .vmxstart64_start_failed
|
---|
494 |
|
---|
495 | ; Restore base and limit of the IDTR & GDTR
|
---|
496 | lidt [xSP]
|
---|
497 | add xSP, xS*2
|
---|
498 | lgdt [xSP]
|
---|
499 | add xSP, xS*2
|
---|
500 |
|
---|
501 | push xDI
|
---|
502 | mov xDI, [xSP + xS * 2] ; pCtx (*2 to skip the saved LDTR)
|
---|
503 |
|
---|
504 | mov qword [xDI + CPUMCTX.eax], rax
|
---|
505 | mov qword [xDI + CPUMCTX.ebx], rbx
|
---|
506 | mov qword [xDI + CPUMCTX.ecx], rcx
|
---|
507 | mov qword [xDI + CPUMCTX.edx], rdx
|
---|
508 | mov qword [xDI + CPUMCTX.esi], rsi
|
---|
509 | mov qword [xDI + CPUMCTX.ebp], rbp
|
---|
510 | mov qword [xDI + CPUMCTX.r8], r8
|
---|
511 | mov qword [xDI + CPUMCTX.r9], r9
|
---|
512 | mov qword [xDI + CPUMCTX.r10], r10
|
---|
513 | mov qword [xDI + CPUMCTX.r11], r11
|
---|
514 | mov qword [xDI + CPUMCTX.r12], r12
|
---|
515 | mov qword [xDI + CPUMCTX.r13], r13
|
---|
516 | mov qword [xDI + CPUMCTX.r14], r14
|
---|
517 | mov qword [xDI + CPUMCTX.r15], r15
|
---|
518 |
|
---|
519 | pop xAX ; the guest edi we pushed above
|
---|
520 | mov qword [xDI + CPUMCTX.edi], rax
|
---|
521 |
|
---|
522 | %ifdef VBOX_WITH_DR6_EXPERIMENT
|
---|
523 | ; Save DR6 - experiment, not safe!
|
---|
524 | mov xAX, dr6
|
---|
525 | mov [xDI + CPUMCTX.dr6], xAX
|
---|
526 | %endif
|
---|
527 |
|
---|
528 | pop xAX ; saved LDTR
|
---|
529 | lldt ax
|
---|
530 |
|
---|
531 | pop xSI ; pCtx (needed in rsi by the macros below)
|
---|
532 |
|
---|
533 | ; Restore the host LSTAR, CSTAR, SFMASK & KERNEL_GSBASE MSRs
|
---|
534 | ;; @todo use the automatic load feature for MSRs
|
---|
535 | LOADHOSTMSREX MSR_K8_KERNEL_GS_BASE, CPUMCTX.msrKERNELGSBASE
|
---|
536 | LOADHOSTMSREX MSR_K8_SF_MASK, CPUMCTX.msrSFMASK
|
---|
537 | LOADHOSTMSREX MSR_K6_STAR, CPUMCTX.msrSTAR
|
---|
538 | %if 0 ; not supported on Intel CPUs
|
---|
539 | LOADHOSTMSREX MSR_K8_CSTAR, CPUMCTX.msrCSTAR
|
---|
540 | %endif
|
---|
541 | LOADHOSTMSREX MSR_K8_LSTAR, CPUMCTX.msrLSTAR
|
---|
542 |
|
---|
543 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
|
---|
544 | pop xDX ; saved pCache
|
---|
545 |
|
---|
546 | mov ecx, [xDX + VMCSCACHE.Read.cValidEntries]
|
---|
547 | cmp ecx, 0 ; can't happen
|
---|
548 | je .no_cached_reads
|
---|
549 | jmp .cached_read
|
---|
550 |
|
---|
551 | ALIGN(16)
|
---|
552 | .cached_read:
|
---|
553 | dec xCX
|
---|
554 | mov eax, [xDX + VMCSCACHE.Read.aField + xCX*4]
|
---|
555 | vmread [xDX + VMCSCACHE.Read.aFieldVal + xCX*8], xAX
|
---|
556 | cmp xCX, 0
|
---|
557 | jnz .cached_read
|
---|
558 | .no_cached_reads:
|
---|
559 |
|
---|
560 | ; Save CR2 for EPT
|
---|
561 | mov xAX, cr2
|
---|
562 | mov [xDX + VMCSCACHE.cr2], xAX
|
---|
563 | %endif
|
---|
564 |
|
---|
565 | ; Restore segment registers
|
---|
566 | MYPOPSEGS xAX, ax
|
---|
567 |
|
---|
568 | ; Restore general purpose registers
|
---|
569 | MYPOPAD
|
---|
570 |
|
---|
571 | mov eax, VINF_SUCCESS
|
---|
572 |
|
---|
573 | .vmstart64_end:
|
---|
574 | popf
|
---|
575 | pop xBP
|
---|
576 | ret
|
---|
577 |
|
---|
578 |
|
---|
579 | .vmxstart64_invalid_vmxon_ptr:
|
---|
580 | ; Restore base and limit of the IDTR & GDTR
|
---|
581 | lidt [xSP]
|
---|
582 | add xSP, xS*2
|
---|
583 | lgdt [xSP]
|
---|
584 | add xSP, xS*2
|
---|
585 |
|
---|
586 | pop xAX ; saved LDTR
|
---|
587 | lldt ax
|
---|
588 |
|
---|
589 | pop xSI ; pCtx (needed in rsi by the macros below)
|
---|
590 |
|
---|
591 | ; Restore the host LSTAR, CSTAR, SFMASK & KERNEL_GSBASE MSRs
|
---|
592 | ;; @todo use the automatic load feature for MSRs
|
---|
593 | LOADHOSTMSREX MSR_K8_KERNEL_GS_BASE, CPUMCTX.msrKERNELGSBASE
|
---|
594 | LOADHOSTMSR MSR_K8_SF_MASK
|
---|
595 | LOADHOSTMSR MSR_K6_STAR
|
---|
596 | %if 0 ; not supported on Intel CPUs
|
---|
597 | LOADHOSTMSR MSR_K8_CSTAR
|
---|
598 | %endif
|
---|
599 | LOADHOSTMSR MSR_K8_LSTAR
|
---|
600 |
|
---|
601 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
|
---|
602 | add xSP, xS ; pCache
|
---|
603 | %endif
|
---|
604 |
|
---|
605 | ; Restore segment registers
|
---|
606 | MYPOPSEGS xAX, ax
|
---|
607 |
|
---|
608 | ; Restore all general purpose host registers.
|
---|
609 | MYPOPAD
|
---|
610 | mov eax, VERR_VMX_INVALID_VMXON_PTR
|
---|
611 | jmp .vmstart64_end
|
---|
612 |
|
---|
613 | .vmxstart64_start_failed:
|
---|
614 | ; Restore base and limit of the IDTR & GDTR
|
---|
615 | lidt [xSP]
|
---|
616 | add xSP, xS*2
|
---|
617 | lgdt [xSP]
|
---|
618 | add xSP, xS*2
|
---|
619 |
|
---|
620 | pop xAX ; saved LDTR
|
---|
621 | lldt ax
|
---|
622 |
|
---|
623 | pop xSI ; pCtx (needed in rsi by the macros below)
|
---|
624 |
|
---|
625 | ; Restore the host LSTAR, CSTAR, SFMASK & KERNEL_GSBASE MSRs
|
---|
626 | ;; @todo use the automatic load feature for MSRs
|
---|
627 | LOADHOSTMSREX MSR_K8_KERNEL_GS_BASE, CPUMCTX.msrKERNELGSBASE
|
---|
628 | LOADHOSTMSR MSR_K8_SF_MASK
|
---|
629 | LOADHOSTMSR MSR_K6_STAR
|
---|
630 | %if 0 ; not supported on Intel CPUs
|
---|
631 | LOADHOSTMSR MSR_K8_CSTAR
|
---|
632 | %endif
|
---|
633 | LOADHOSTMSR MSR_K8_LSTAR
|
---|
634 |
|
---|
635 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
|
---|
636 | add xSP, xS ; pCache
|
---|
637 | %endif
|
---|
638 |
|
---|
639 | ; Restore segment registers
|
---|
640 | MYPOPSEGS xAX, ax
|
---|
641 |
|
---|
642 | ; Restore all general purpose host registers.
|
---|
643 | MYPOPAD
|
---|
644 | mov eax, VERR_VMX_UNABLE_TO_START_VM
|
---|
645 | jmp .vmstart64_end
|
---|
646 | ENDPROC MY_NAME(VMXR0StartVM64)
|
---|
647 | %endif ; RT_ARCH_AMD64
|
---|
648 |
|
---|
649 |
|
---|
650 | ;/**
|
---|
651 | ; * Prepares for and executes VMRUN (32 bits guests)
|
---|
652 | ; *
|
---|
653 | ; * @returns VBox status code
|
---|
654 | ; * @param HCPhysVMCB Physical address of host VMCB
|
---|
655 | ; * @param HCPhysVMCB Physical address of guest VMCB
|
---|
656 | ; * @param pCtx Guest context
|
---|
657 | ; */
|
---|
658 | ALIGNCODE(16)
|
---|
659 | BEGINPROC MY_NAME(SVMR0VMRun)
|
---|
660 | %ifdef RT_ARCH_AMD64 ; fake a cdecl stack frame
|
---|
661 | %ifdef ASM_CALL64_GCC
|
---|
662 | push rdx
|
---|
663 | push rsi
|
---|
664 | push rdi
|
---|
665 | %else
|
---|
666 | push r8
|
---|
667 | push rdx
|
---|
668 | push rcx
|
---|
669 | %endif
|
---|
670 | push 0
|
---|
671 | %endif
|
---|
672 | push xBP
|
---|
673 | mov xBP, xSP
|
---|
674 | pushf
|
---|
675 |
|
---|
676 | ;/* Manual save and restore:
|
---|
677 | ; * - General purpose registers except RIP, RSP, RAX
|
---|
678 | ; *
|
---|
679 | ; * Trashed:
|
---|
680 | ; * - CR2 (we don't care)
|
---|
681 | ; * - LDTR (reset to 0)
|
---|
682 | ; * - DRx (presumably not changed at all)
|
---|
683 | ; * - DR7 (reset to 0x400)
|
---|
684 | ; */
|
---|
685 |
|
---|
686 | ;/* Save all general purpose host registers. */
|
---|
687 | MYPUSHAD
|
---|
688 |
|
---|
689 | ;/* Save the Guest CPU context pointer. */
|
---|
690 | mov xSI, [xBP + xS*2 + RTHCPHYS_CB*2] ; pCtx
|
---|
691 | push xSI ; push for saving the state at the end
|
---|
692 |
|
---|
693 | ; save host fs, gs, sysenter msr etc
|
---|
694 | mov xAX, [xBP + xS*2] ; pVMCBHostPhys (64 bits physical address; x86: take low dword only)
|
---|
695 | push xAX ; save for the vmload after vmrun
|
---|
696 | vmsave
|
---|
697 |
|
---|
698 | ; setup eax for VMLOAD
|
---|
699 | mov xAX, [xBP + xS*2 + RTHCPHYS_CB] ; pVMCBPhys (64 bits physical address; take low dword only)
|
---|
700 |
|
---|
701 | ;/* Restore Guest's general purpose registers. */
|
---|
702 | ;/* EAX is loaded from the VMCB by VMRUN */
|
---|
703 | mov ebx, [xSI + CPUMCTX.ebx]
|
---|
704 | mov ecx, [xSI + CPUMCTX.ecx]
|
---|
705 | mov edx, [xSI + CPUMCTX.edx]
|
---|
706 | mov edi, [xSI + CPUMCTX.edi]
|
---|
707 | mov ebp, [xSI + CPUMCTX.ebp]
|
---|
708 | mov esi, [xSI + CPUMCTX.esi]
|
---|
709 |
|
---|
710 | ; Clear the global interrupt flag & execute sti to make sure external interrupts cause a world switch
|
---|
711 | clgi
|
---|
712 | sti
|
---|
713 |
|
---|
714 | ; load guest fs, gs, sysenter msr etc
|
---|
715 | vmload
|
---|
716 | ; run the VM
|
---|
717 | vmrun
|
---|
718 |
|
---|
719 | ;/* EAX is in the VMCB already; we can use it here. */
|
---|
720 |
|
---|
721 | ; save guest fs, gs, sysenter msr etc
|
---|
722 | vmsave
|
---|
723 |
|
---|
724 | ; load host fs, gs, sysenter msr etc
|
---|
725 | pop xAX ; pushed above
|
---|
726 | vmload
|
---|
727 |
|
---|
728 | ; Set the global interrupt flag again, but execute cli to make sure IF=0.
|
---|
729 | cli
|
---|
730 | stgi
|
---|
731 |
|
---|
732 | pop xAX ; pCtx
|
---|
733 |
|
---|
734 | mov [ss:xAX + CPUMCTX.ebx], ebx
|
---|
735 | mov [ss:xAX + CPUMCTX.ecx], ecx
|
---|
736 | mov [ss:xAX + CPUMCTX.edx], edx
|
---|
737 | mov [ss:xAX + CPUMCTX.esi], esi
|
---|
738 | mov [ss:xAX + CPUMCTX.edi], edi
|
---|
739 | mov [ss:xAX + CPUMCTX.ebp], ebp
|
---|
740 |
|
---|
741 | ; Restore general purpose registers
|
---|
742 | MYPOPAD
|
---|
743 |
|
---|
744 | mov eax, VINF_SUCCESS
|
---|
745 |
|
---|
746 | popf
|
---|
747 | pop xBP
|
---|
748 | %ifdef RT_ARCH_AMD64
|
---|
749 | add xSP, 4*xS
|
---|
750 | %endif
|
---|
751 | ret
|
---|
752 | ENDPROC MY_NAME(SVMR0VMRun)
|
---|
753 |
|
---|
754 | %ifdef RT_ARCH_AMD64
|
---|
755 | ;/**
|
---|
756 | ; * Prepares for and executes VMRUN (64 bits guests)
|
---|
757 | ; *
|
---|
758 | ; * @returns VBox status code
|
---|
759 | ; * @param HCPhysVMCB Physical address of host VMCB
|
---|
760 | ; * @param HCPhysVMCB Physical address of guest VMCB
|
---|
761 | ; * @param pCtx Guest context
|
---|
762 | ; */
|
---|
763 | ALIGNCODE(16)
|
---|
764 | BEGINPROC MY_NAME(SVMR0VMRun64)
|
---|
765 | ; fake a cdecl stack frame
|
---|
766 | %ifdef ASM_CALL64_GCC
|
---|
767 | push rdx
|
---|
768 | push rsi
|
---|
769 | push rdi
|
---|
770 | %else
|
---|
771 | push r8
|
---|
772 | push rdx
|
---|
773 | push rcx
|
---|
774 | %endif
|
---|
775 | push 0
|
---|
776 | push rbp
|
---|
777 | mov rbp, rsp
|
---|
778 | pushf
|
---|
779 |
|
---|
780 | ;/* Manual save and restore:
|
---|
781 | ; * - General purpose registers except RIP, RSP, RAX
|
---|
782 | ; *
|
---|
783 | ; * Trashed:
|
---|
784 | ; * - CR2 (we don't care)
|
---|
785 | ; * - LDTR (reset to 0)
|
---|
786 | ; * - DRx (presumably not changed at all)
|
---|
787 | ; * - DR7 (reset to 0x400)
|
---|
788 | ; */
|
---|
789 |
|
---|
790 | ;/* Save all general purpose host registers. */
|
---|
791 | MYPUSHAD
|
---|
792 |
|
---|
793 | ;/* Save the Guest CPU context pointer. */
|
---|
794 | mov rsi, [rbp + xS*2 + RTHCPHYS_CB*2] ; pCtx
|
---|
795 | push rsi ; push for saving the state at the end
|
---|
796 |
|
---|
797 | ; save host fs, gs, sysenter msr etc
|
---|
798 | mov rax, [rbp + xS*2] ; pVMCBHostPhys (64 bits physical address; x86: take low dword only)
|
---|
799 | push rax ; save for the vmload after vmrun
|
---|
800 | vmsave
|
---|
801 |
|
---|
802 | ; setup eax for VMLOAD
|
---|
803 | mov rax, [rbp + xS*2 + RTHCPHYS_CB] ; pVMCBPhys (64 bits physical address; take low dword only)
|
---|
804 |
|
---|
805 | ;/* Restore Guest's general purpose registers. */
|
---|
806 | ;/* RAX is loaded from the VMCB by VMRUN */
|
---|
807 | mov rbx, qword [xSI + CPUMCTX.ebx]
|
---|
808 | mov rcx, qword [xSI + CPUMCTX.ecx]
|
---|
809 | mov rdx, qword [xSI + CPUMCTX.edx]
|
---|
810 | mov rdi, qword [xSI + CPUMCTX.edi]
|
---|
811 | mov rbp, qword [xSI + CPUMCTX.ebp]
|
---|
812 | mov r8, qword [xSI + CPUMCTX.r8]
|
---|
813 | mov r9, qword [xSI + CPUMCTX.r9]
|
---|
814 | mov r10, qword [xSI + CPUMCTX.r10]
|
---|
815 | mov r11, qword [xSI + CPUMCTX.r11]
|
---|
816 | mov r12, qword [xSI + CPUMCTX.r12]
|
---|
817 | mov r13, qword [xSI + CPUMCTX.r13]
|
---|
818 | mov r14, qword [xSI + CPUMCTX.r14]
|
---|
819 | mov r15, qword [xSI + CPUMCTX.r15]
|
---|
820 | mov rsi, qword [xSI + CPUMCTX.esi]
|
---|
821 |
|
---|
822 | ; Clear the global interrupt flag & execute sti to make sure external interrupts cause a world switch
|
---|
823 | clgi
|
---|
824 | sti
|
---|
825 |
|
---|
826 | ; load guest fs, gs, sysenter msr etc
|
---|
827 | vmload
|
---|
828 | ; run the VM
|
---|
829 | vmrun
|
---|
830 |
|
---|
831 | ;/* RAX is in the VMCB already; we can use it here. */
|
---|
832 |
|
---|
833 | ; save guest fs, gs, sysenter msr etc
|
---|
834 | vmsave
|
---|
835 |
|
---|
836 | ; load host fs, gs, sysenter msr etc
|
---|
837 | pop rax ; pushed above
|
---|
838 | vmload
|
---|
839 |
|
---|
840 | ; Set the global interrupt flag again, but execute cli to make sure IF=0.
|
---|
841 | cli
|
---|
842 | stgi
|
---|
843 |
|
---|
844 | pop rax ; pCtx
|
---|
845 |
|
---|
846 | mov qword [rax + CPUMCTX.ebx], rbx
|
---|
847 | mov qword [rax + CPUMCTX.ecx], rcx
|
---|
848 | mov qword [rax + CPUMCTX.edx], rdx
|
---|
849 | mov qword [rax + CPUMCTX.esi], rsi
|
---|
850 | mov qword [rax + CPUMCTX.edi], rdi
|
---|
851 | mov qword [rax + CPUMCTX.ebp], rbp
|
---|
852 | mov qword [rax + CPUMCTX.r8], r8
|
---|
853 | mov qword [rax + CPUMCTX.r9], r9
|
---|
854 | mov qword [rax + CPUMCTX.r10], r10
|
---|
855 | mov qword [rax + CPUMCTX.r11], r11
|
---|
856 | mov qword [rax + CPUMCTX.r12], r12
|
---|
857 | mov qword [rax + CPUMCTX.r13], r13
|
---|
858 | mov qword [rax + CPUMCTX.r14], r14
|
---|
859 | mov qword [rax + CPUMCTX.r15], r15
|
---|
860 |
|
---|
861 | ; Restore general purpose registers
|
---|
862 | MYPOPAD
|
---|
863 |
|
---|
864 | mov eax, VINF_SUCCESS
|
---|
865 |
|
---|
866 | popf
|
---|
867 | pop rbp
|
---|
868 | add rsp, 4*xS
|
---|
869 | ret
|
---|
870 | ENDPROC MY_NAME(SVMR0VMRun64)
|
---|
871 | %endif ; RT_ARCH_AMD64
|
---|
872 |
|
---|