VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR3/GIMMinimal.cpp@ 100696

Last change on this file since 100696 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1/* $Id: GIMMinimal.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * GIM - Guest Interface Manager, Minimal implementation.
4 */
5
6/*
7 * Copyright (C) 2014-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28
29/*********************************************************************************************************************************
30* Header Files *
31*********************************************************************************************************************************/
32#define LOG_GROUP LOG_GROUP_GIM
33#include <VBox/vmm/gim.h>
34#include <VBox/vmm/cpum.h>
35#include <VBox/vmm/tm.h>
36#include <VBox/vmm/apic.h>
37#include "GIMInternal.h"
38#include <VBox/vmm/vm.h>
39
40#include <iprt/assert.h>
41#include <iprt/err.h>
42#include <iprt/string.h>
43
44
45/*********************************************************************************************************************************
46* Defined Constants And Macros *
47*********************************************************************************************************************************/
48
49/**
50 * Initializes the Minimal provider.
51 *
52 * @returns VBox status code.
53 * @param pVM The cross context VM structure.
54 */
55VMMR3_INT_DECL(int) gimR3MinimalInit(PVM pVM)
56{
57 AssertReturn(pVM, VERR_INVALID_PARAMETER);
58 AssertReturn(pVM->gim.s.enmProviderId == GIMPROVIDERID_MINIMAL, VERR_INTERNAL_ERROR_5);
59
60 /*
61 * Expose HVP (Hypervisor Present) bit to the guest.
62 */
63 CPUMR3SetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_HVP);
64
65 /*
66 * Insert the hypervisor leaf range.
67 */
68 CPUMCPUIDLEAF HyperLeaf;
69 RT_ZERO(HyperLeaf);
70 HyperLeaf.uLeaf = UINT32_C(0x40000000);
71 HyperLeaf.uEax = UINT32_C(0x40000010); /* Maximum leaf we implement. */
72 int rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
73 if (RT_SUCCESS(rc))
74 {
75 /*
76 * Insert missing zero leaves (you never know what missing leaves are
77 * going to return when read).
78 */
79 RT_ZERO(HyperLeaf);
80 for (uint32_t uLeaf = UINT32_C(0x40000001); uLeaf <= UINT32_C(0x40000010); uLeaf++)
81 {
82 HyperLeaf.uLeaf = uLeaf;
83 rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
84 AssertLogRelRCReturn(rc, rc);
85 }
86 }
87 else
88 LogRel(("GIM: Minimal: Failed to insert hypervisor leaf %#RX32. rc=%Rrc\n", HyperLeaf.uLeaf, rc));
89
90 return rc;
91}
92
93
94/**
95 * Initializes remaining bits of the Minimal provider.
96 * This is called after initializing HM and almost all other VMM components.
97 *
98 * @returns VBox status code.
99 * @param pVM The cross context VM structure.
100 */
101VMMR3_INT_DECL(int) gimR3MinimalInitCompleted(PVM pVM)
102{
103 /*
104 * Expose a generic hypervisor-agnostic leaf (originally defined by VMware).
105 * The leaves range from 0x40000010 to 0x400000FF.
106 *
107 * This is done in the init. completed routine as we need PDM to be
108 * initialized (otherwise APICGetTimerFreq() would fail).
109 */
110 CPUMCPUIDLEAF HyperLeaf;
111 int rc = CPUMR3CpuIdGetLeaf(pVM, &HyperLeaf, 0x40000000, 0 /* uSubLeaf */);
112 if (RT_SUCCESS(rc))
113 {
114 Assert(HyperLeaf.uEax >= 0x40000010);
115
116 /*
117 * Add the timing information hypervisor leaf.
118 * MacOS X uses this to determine the TSC, bus frequency. See @bugref{7270}.
119 *
120 * EAX - TSC frequency in KHz.
121 * EBX - APIC frequency in KHz.
122 * ECX, EDX - Reserved.
123 */
124 uint64_t uApicFreq;
125 rc = APICGetTimerFreq(pVM, &uApicFreq);
126 AssertLogRelRCReturn(rc, rc);
127
128 RT_ZERO(HyperLeaf);
129 HyperLeaf.uLeaf = UINT32_C(0x40000010);
130 HyperLeaf.uEax = TMCpuTicksPerSecond(pVM) / UINT64_C(1000);
131 HyperLeaf.uEbx = (uApicFreq + 500) / UINT64_C(1000);
132 rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
133 AssertLogRelRCReturn(rc, rc);
134 }
135 else
136 LogRel(("GIM: Minimal: failed to get hypervisor leaf 0x40000000. rc=%Rrc\n", rc));
137
138 return VINF_SUCCESS;
139}
140
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