1 | /* $Id: GIMMinimal.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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2 | /** @file
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3 | * GIM - Guest Interface Manager, Minimal implementation.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2014-2024 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 |
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29 | /*********************************************************************************************************************************
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30 | * Header Files *
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31 | *********************************************************************************************************************************/
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32 | #define LOG_GROUP LOG_GROUP_GIM
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33 | #include <VBox/vmm/gim.h>
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34 | #include <VBox/vmm/cpum.h>
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35 | #include <VBox/vmm/tm.h>
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36 | #include <VBox/vmm/apic.h>
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37 | #include "GIMInternal.h"
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38 | #include <VBox/vmm/vm.h>
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39 |
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40 | #include <iprt/assert.h>
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41 | #include <iprt/err.h>
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42 | #include <iprt/string.h>
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43 |
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44 |
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45 | /*********************************************************************************************************************************
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46 | * Defined Constants And Macros *
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47 | *********************************************************************************************************************************/
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48 |
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49 | /**
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50 | * Initializes the Minimal provider.
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51 | *
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52 | * @returns VBox status code.
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53 | * @param pVM The cross context VM structure.
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54 | */
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55 | VMMR3_INT_DECL(int) gimR3MinimalInit(PVM pVM)
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56 | {
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57 | AssertReturn(pVM, VERR_INVALID_PARAMETER);
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58 | AssertReturn(pVM->gim.s.enmProviderId == GIMPROVIDERID_MINIMAL, VERR_INTERNAL_ERROR_5);
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59 |
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60 | /*
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61 | * Expose HVP (Hypervisor Present) bit to the guest.
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62 | */
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63 | CPUMR3SetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_HVP);
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64 |
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65 | /*
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66 | * Insert the hypervisor leaf range.
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67 | */
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68 | CPUMCPUIDLEAF HyperLeaf;
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69 | RT_ZERO(HyperLeaf);
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70 | HyperLeaf.uLeaf = UINT32_C(0x40000000);
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71 | HyperLeaf.uEax = UINT32_C(0x40000010); /* Maximum leaf we implement. */
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72 | int rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
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73 | if (RT_SUCCESS(rc))
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74 | {
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75 | /*
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76 | * Insert missing zero leaves (you never know what missing leaves are
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77 | * going to return when read).
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78 | */
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79 | RT_ZERO(HyperLeaf);
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80 | for (uint32_t uLeaf = UINT32_C(0x40000001); uLeaf <= UINT32_C(0x40000010); uLeaf++)
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81 | {
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82 | HyperLeaf.uLeaf = uLeaf;
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83 | rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
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84 | AssertLogRelRCReturn(rc, rc);
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85 | }
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86 | }
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87 | else
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88 | LogRel(("GIM: Minimal: Failed to insert hypervisor leaf %#RX32. rc=%Rrc\n", HyperLeaf.uLeaf, rc));
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89 |
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90 | return rc;
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91 | }
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92 |
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93 |
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94 | /**
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95 | * Initializes remaining bits of the Minimal provider.
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96 | * This is called after initializing HM and almost all other VMM components.
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97 | *
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98 | * @returns VBox status code.
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99 | * @param pVM The cross context VM structure.
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100 | */
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101 | VMMR3_INT_DECL(int) gimR3MinimalInitCompleted(PVM pVM)
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102 | {
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103 | /*
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104 | * Expose a generic hypervisor-agnostic leaf (originally defined by VMware).
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105 | * The leaves range from 0x40000010 to 0x400000FF.
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106 | *
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107 | * This is done in the init. completed routine as we need PDM to be
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108 | * initialized (otherwise APICGetTimerFreq() would fail).
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109 | */
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110 | CPUMCPUIDLEAF HyperLeaf;
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111 | int rc = CPUMR3CpuIdGetLeaf(pVM, &HyperLeaf, 0x40000000, 0 /* uSubLeaf */);
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112 | if (RT_SUCCESS(rc))
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113 | {
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114 | Assert(HyperLeaf.uEax >= 0x40000010);
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115 |
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116 | /*
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117 | * Add the timing information hypervisor leaf.
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118 | * MacOS X uses this to determine the TSC, bus frequency. See @bugref{7270}.
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119 | *
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120 | * EAX - TSC frequency in KHz.
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121 | * EBX - APIC frequency in KHz.
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122 | * ECX, EDX - Reserved.
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123 | */
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124 | uint64_t uApicFreq;
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125 | rc = APICGetTimerFreq(pVM, &uApicFreq);
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126 | AssertLogRelRCReturn(rc, rc);
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127 |
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128 | RT_ZERO(HyperLeaf);
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129 | HyperLeaf.uLeaf = UINT32_C(0x40000010);
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130 | HyperLeaf.uEax = TMCpuTicksPerSecond(pVM) / UINT64_C(1000);
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131 | HyperLeaf.uEbx = (uApicFreq + 500) / UINT64_C(1000);
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132 | rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
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133 | AssertLogRelRCReturn(rc, rc);
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134 | }
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135 | else
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136 | LogRel(("GIM: Minimal: failed to get hypervisor leaf 0x40000000. rc=%Rrc\n", rc));
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137 |
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138 | return VINF_SUCCESS;
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139 | }
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140 |
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