1 | /* $Id: vbox-tpm.dsl 105047 2024-06-27 09:05:56Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox ACPI - TPM ACPI device.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2021-2024 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * SPDX-License-Identifier: GPL-3.0-only
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26 | */
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27 |
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28 | DefinitionBlock ("SSDT.aml", "SSDT", 1, "VBOX ", "VBOXTPMT", 2)
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29 | {
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30 | External(DBG, MethodObj, ,)
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31 |
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32 | Scope (\_SB)
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33 | {
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34 | Device (TPM)
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35 | {
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36 | Method (_HID, 0, NotSerialized)
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37 | {
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38 | If (LEqual(IFID, One))
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39 | {
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40 | Return ("PNP0C31")
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41 | }
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42 | Else
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43 | {
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44 | Return ("MSFT0101")
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45 | }
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46 | }
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47 |
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48 | Method (_CID, 0, NotSerialized)
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49 | {
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50 | If (LEqual(IFID, One))
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51 | {
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52 | Return ("PNP0C31")
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53 | }
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54 | Else
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55 | {
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56 | Return ("MSFT0101")
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57 | }
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58 | }
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59 |
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60 | Method (_STR, 0, NotSerialized)
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61 | {
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62 | If (LEqual(IFID, One))
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63 | {
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64 | Return (Unicode ("TPM 1.2 Device"))
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65 | }
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66 | Else
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67 | {
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68 | Return (Unicode ("TPM 2.0 Device"))
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69 | }
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70 | }
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71 |
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72 | Method (_STA, 0, NotSerialized)
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73 | {
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74 | Return (0x0F)
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75 | }
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76 |
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77 | OperationRegion (TPMR, SystemMemory, 0xFED40000, 0x5000)
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78 | Field(TPMR, AnyAcc, NoLock, Preserve)
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79 | {
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80 | Offset(0x30),
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81 | IFID, 1,
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82 | }
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83 |
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84 | Name(RES, ResourceTemplate()
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85 | {
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86 | Memory32Fixed (ReadWrite, 0xfed40000, 0x5000, REG1)
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87 | })
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88 |
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89 | Method (_CRS, 0, Serialized)
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90 | {
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91 | Return (RES)
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92 | }
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93 |
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94 | Method (TPFS, 1, Serialized)
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95 | {
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96 | If (LGreaterEqual(Arg0, 0x100))
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97 | {
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98 | Return (Zero)
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99 | }
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100 |
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101 | OperationRegion (TPP1, SystemMemory, Add(0xFED45000, Arg0), One)
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102 | Field (TPP1, ByteAcc, NoLock, Preserve)
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103 | {
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104 | TPPF, 8
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105 | }
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106 |
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107 | Return (TPPF)
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108 | }
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109 |
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110 | /**
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111 | * Device-Specific Method
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112 | */
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113 | Method (_DSM, 4, Serialized)
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114 | {
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115 | /**
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116 | * The TPM Physical Presence Interface MMIO region.
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117 | */
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118 | OperationRegion (TPMP, SystemMemory, 0xFED45100, 0x5A)
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119 | Field (TPMP, AnyAcc, NoLock, Preserve)
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120 | {
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121 | PPIN, 8,
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122 | PPIP, 32,
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123 | PPRP, 32,
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124 | PPRQ, 32,
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125 | PPRM, 32,
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126 | LPPR, 32
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127 | }
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128 |
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129 | Name (TPB2, Package (0x02)
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130 | {
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131 | Zero,
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132 | Zero
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133 | })
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134 |
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135 | Name (TPB3, Package (0x03)
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136 | {
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137 | Zero,
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138 | Zero,
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139 | Zero
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140 | })
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141 |
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142 | /**
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143 | * Physical Presence Interface Specification PPI.
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144 | */
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145 | If (LEqual (Arg0, ToUUID("3dddfaa6-361b-4eb4-a424-8d10089d1653")))
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146 | {
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147 | /**
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148 | * Standard _DSM query function.
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149 | */
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150 | If (LEqual (Arg2, Zero))
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151 | {
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152 | DBG("_DSM: Query\n")
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153 | Return (Buffer (0x02) { 0xFF, 0x01 })
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154 | }
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155 |
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156 | /**
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157 | * Query supported PPI revision.
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158 | *
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159 | * Result:
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160 | * 1.3 (string).
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161 | */
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162 | If (LEqual (Arg2, One))
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163 | {
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164 | DBG("_DSM: PPI Revision\n")
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165 | Return ("1.3")
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166 | }
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167 |
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168 | /**
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169 | * Submit TPM Operation Request to pre-OS environment.
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170 | *
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171 | * Input:
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172 | * Package[0] - Operation value of the request
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173 | * Result:
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174 | * - 0: Success
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175 | * - 1: Operation value of the request not supported.
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176 | * - 2: General failure
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177 | */
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178 | If (LEqual (Arg2, 0x02))
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179 | {
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180 | DBG("_DSM: Submit TPM Operation Request\n")
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181 |
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182 | Store(DerefOf(Index(Arg3, Zero)), Local0)
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183 | Store(TPFS(Local0), Local1)
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184 | If (LEqual(And(Local1, 0x07), Zero))
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185 | {
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186 | Return (One)
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187 | }
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188 |
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189 | Store(Local0, PPRQ)
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190 | Store(Zero, PPRM)
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191 | Return (Zero)
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192 | }
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193 |
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194 | /**
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195 | * Get Pending TPM Operation Requested by the OS.
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196 | *
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197 | * Result:
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198 | * Package[0] - Function Return Code:
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199 | * - 0: Success
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200 | * - 1: General Failure
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201 | * Package[1] - Pending operation requested by the OS:
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202 | * - 0: None
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203 | * - >0: Operation value of the pending request
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204 | * Package[2] - Optional argument to pending operation requested by the OS:
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205 | * - 0: None
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206 | * - >0: Argument value of the pending request
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207 | */
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208 | If (LEqual (Arg2, 0x03))
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209 | {
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210 | DBG("_DSM: Get Pending TPM Operation Request\n")
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211 |
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212 | if (LEqual(Arg1, One))
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213 | {
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214 | Store(PPRQ, Index(TPB2, One))
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215 | Return (TPB2)
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216 | }
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217 |
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218 | if (LEqual(Arg1, 0x02))
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219 | {
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220 | Store(PPRQ, Index(TPB3, One))
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221 | Store(PPRM, Index(TPB3, 0x02))
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222 | Return (TPB3)
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223 | }
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224 |
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225 | Return (TPB3)
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226 | }
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227 |
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228 | /**
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229 | * Get Platform-Specific Action to Transition to Pre-OS Environment.
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230 | *
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231 | * Result:
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232 | * - 0: None
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233 | * - 1: Shutdown
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234 | * - 2: Reboot
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235 | * - 3: OS vendor specific
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236 | */
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237 | If (LEqual (Arg2, 0x04))
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238 | {
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239 | DBG("_DSM: Get Platform-Specific Action to Transition to Pre-OS Environment\n")
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240 |
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241 | Return (0x02)
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242 | }
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243 |
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244 | /**
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245 | * Return TPM Operation Response to OS Environment.
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246 | */
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247 | If (LEqual (Arg2, 0x05))
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248 | {
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249 | DBG("_DSM: Return TPM Operation Response to OS Environment\n")
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250 |
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251 | Store (LPPR, Index (TPB3, One))
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252 | Store (PPRP, Index (TPB3, 0x02))
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253 | Return (TPB3)
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254 | }
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255 |
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256 | /**
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257 | * Submit preferred user language - deprecated
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258 | *
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259 | * Result:
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260 | * - 3: Not implemented
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261 | */
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262 | If (LEqual (Arg2, 0x06))
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263 | {
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264 | DBG("_DSM: Submit preferred user language\n")
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265 |
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266 | Return (0x03)
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267 | }
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268 |
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269 | /**
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270 | * Submit TPM Operation Request to Pre-OS Environment 2
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271 | */
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272 | If (LEqual (Arg2, 0x07))
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273 | {
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274 | DBG("_DSM: Submit TPM Operation Request 2\n")
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275 |
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276 | Store(DerefOf(Index(Arg3, Zero)), Local0) /* Local0 = *Arg3[0] (Arg3 is a Package) */
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277 | Store(TPFS(Local0), Local1) /* Local1 = TPFS(Local0) */
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278 | Store(And(Local1, 0x07), Local1) /* Local1 &= 0x7 */
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279 | If (LEqual(Local1, Zero))
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280 | {
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281 | Return (One) /* Operation not implemented */
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282 | }
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283 |
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284 | If (LEqual(Local1, 0x02))
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285 | {
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286 | Return (0x03) /* Operation blocked by current firmware settings */
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287 | }
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288 |
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289 | If (LEqual(Arg1, One))
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290 | {
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291 | Store(Local0, PPRQ)
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292 | Store(Zero, PPRM)
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293 | }
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294 |
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295 | If (LEqual(Arg1, 0x02))
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296 | {
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297 | Store(DerefOf(Index(Arg3, One)), Local2) /* Local2 = *Arg3[1] (Arg3 is a Package) */
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298 |
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299 | Store(Local0, PPRQ)
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300 | Store(Local2, PPRM)
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301 | }
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302 |
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303 | Return (Zero)
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304 | }
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305 |
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306 | /**
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307 | * Get User Confirmation Status for Operation.
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308 | *
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309 | * Input is the operation value maybe needing user confirmation
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310 | * Result:
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311 | * - 0: Not implemented
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312 | * - 1: Firmware only
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313 | * - 2: Blocked for OS by firmware configuration.
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314 | * - 3: Allowed and physically present user required
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315 | * - 4: Allowed and physically present user not required.
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316 | */
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317 | If (LEqual (Arg2, 0x08))
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318 | {
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319 | DBG("_DSM: Get user confirmation status for operation\n")
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320 |
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321 | Store(DerefOf(Index(Arg3, Zero)), Local0)
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322 | Store(TPFS(Local0), Local1)
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323 |
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324 | Return (And(Local1, 0x7))
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325 | }
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326 |
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327 | DBG("TPM_DSM: Unknown function\n")
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328 | Return (Buffer (One) { 0x00 })
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329 | }
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330 |
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331 | /**
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332 | * TCG Platform Reset Attack Mitigation Specification interface.
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333 | */
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334 | If (LEqual (Arg0, ToUUID("376054ed-cc13-4675-901c-4756d7f2d45d")))
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335 | {
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336 | /**
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337 | * Standard _DSM query function.
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338 | */
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339 | If (LEqual (Arg2, Zero))
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340 | {
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341 | Return (Buffer (One) { 0x03 })
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342 | }
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343 |
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344 | /**
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345 | * Set Memory Overwrite Request (MOR) bit to specified value.
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346 | */
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347 | If (LEqual (Arg2, One))
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348 | {
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349 | /* Memory is always zeroed on reset. */
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350 | Return (Zero)
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351 | }
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352 |
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353 | Return (Buffer (One) { 0x00 })
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354 | }
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355 |
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356 | Return (Buffer (One) { 0x00 })
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357 | }
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358 | }
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359 | }
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360 | }
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361 |
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362 | /*
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363 | * Local Variables:
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364 | * comment-start: "//"
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365 | * End:
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366 | */
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367 |
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