| 1 | /* $Id: GIMKvmInternal.h 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * GIM - KVM, Internal header file.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2015-2023 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 | #ifndef VMM_INCLUDED_SRC_include_GIMKvmInternal_h
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| 29 | #define VMM_INCLUDED_SRC_include_GIMKvmInternal_h
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| 30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 31 | # pragma once
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| 32 | #endif
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| 33 |
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| 34 | #include <VBox/vmm/gim.h>
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| 35 | #include <VBox/vmm/cpum.h>
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| 36 |
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| 37 |
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| 38 | /** @name KVM base features.
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| 39 | * @{
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| 40 | */
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| 41 | /** Old, deprecated clock source available. */
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| 42 | #define GIM_KVM_BASE_FEAT_CLOCK_OLD RT_BIT(0)
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| 43 | /** No need for artifical delays on IO operations. */
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| 44 | #define GIM_KVM_BASE_FEAT_NOP_IO_DELAY RT_BIT(1)
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| 45 | /** MMU op supported (deprecated, unused). */
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| 46 | #define GIM_KVM_BASE_FEAT_MMU_OP RT_BIT(2)
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| 47 | /** Clock source available. */
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| 48 | #define GIM_KVM_BASE_FEAT_CLOCK RT_BIT(3)
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| 49 | /** Asynchronous page faults supported. */
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| 50 | #define GIM_KVM_BASE_FEAT_ASYNC_PF RT_BIT(4)
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| 51 | /** Steal time (VCPU not executing guest code time in ns) available. */
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| 52 | #define GIM_KVM_BASE_FEAT_STEAL_TIME RT_BIT(5)
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| 53 | /** Paravirtualized EOI (end-of-interrupt) supported. */
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| 54 | #define GIM_KVM_BASE_FEAT_PV_EOI RT_BIT(6)
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| 55 | /** Paravirtualized spinlock (unhalting VCPU) supported. */
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| 56 | #define GIM_KVM_BASE_FEAT_PV_UNHALT RT_BIT(7)
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| 57 | /** The TSC is stable (fixed rate, monotonic). */
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| 58 | #define GIM_KVM_BASE_FEAT_TSC_STABLE RT_BIT(24)
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| 59 | /** @} */
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| 60 |
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| 61 |
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| 62 | /** @name KVM MSRs.
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| 63 | * @{
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| 64 | */
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| 65 | /** Start of range 0. */
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| 66 | #define MSR_GIM_KVM_RANGE0_FIRST UINT32_C(0x11)
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| 67 | /** Old, deprecated wall clock. */
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| 68 | #define MSR_GIM_KVM_WALL_CLOCK_OLD UINT32_C(0x11)
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| 69 | /** Old, deprecated System time. */
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| 70 | #define MSR_GIM_KVM_SYSTEM_TIME_OLD UINT32_C(0x12)
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| 71 | /** End of range 0. */
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| 72 | #define MSR_GIM_KVM_RANGE0_LAST MSR_GIM_KVM_SYSTEM_TIME_OLD
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| 73 |
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| 74 | /** Start of range 1. */
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| 75 | #define MSR_GIM_KVM_RANGE1_FIRST UINT32_C(0x4b564d00)
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| 76 | /** Wall clock. */
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| 77 | #define MSR_GIM_KVM_WALL_CLOCK UINT32_C(0x4b564d00)
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| 78 | /** System time. */
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| 79 | #define MSR_GIM_KVM_SYSTEM_TIME UINT32_C(0x4b564d01)
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| 80 | /** Asynchronous page fault. */
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| 81 | #define MSR_GIM_KVM_ASYNC_PF UINT32_C(0x4b564d02)
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| 82 | /** Steal time. */
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| 83 | #define MSR_GIM_KVM_STEAL_TIME UINT32_C(0x4b564d03)
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| 84 | /** Paravirtualized EOI (end-of-interrupt). */
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| 85 | #define MSR_GIM_KVM_EOI UINT32_C(0x4b564d04)
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| 86 | /** End of range 1. */
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| 87 | #define MSR_GIM_KVM_RANGE1_LAST MSR_GIM_KVM_EOI
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| 88 |
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| 89 | AssertCompile(MSR_GIM_KVM_RANGE0_FIRST <= MSR_GIM_KVM_RANGE0_LAST);
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| 90 | AssertCompile(MSR_GIM_KVM_RANGE1_FIRST <= MSR_GIM_KVM_RANGE1_LAST);
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| 91 | /** @} */
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| 92 |
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| 93 | /** KVM page size. */
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| 94 | #define GIM_KVM_PAGE_SIZE 0x1000
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| 95 |
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| 96 | /**
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| 97 | * MMIO2 region indices.
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| 98 | */
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| 99 | /** The system time page(s) region. */
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| 100 | #define GIM_KVM_SYSTEM_TIME_PAGE_REGION_IDX UINT8_C(0)
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| 101 | /** The steal time page(s) region. */
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| 102 | #define GIM_KVM_STEAL_TIME_PAGE_REGION_IDX UINT8_C(1)
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| 103 | /** The maximum region index (must be <= UINT8_MAX). */
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| 104 | #define GIM_KVM_REGION_IDX_MAX GIM_KVM_STEAL_TIME_PAGE_REGION_IDX
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| 105 |
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| 106 | /**
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| 107 | * KVM system-time structure (GIM_KVM_SYSTEM_TIME_FLAGS_XXX) flags.
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| 108 | * See "Documentation/virtual/kvm/api.txt".
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| 109 | */
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| 110 | /** The TSC is stable (monotonic). */
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| 111 | #define GIM_KVM_SYSTEM_TIME_FLAGS_TSC_STABLE RT_BIT(0)
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| 112 | /** The guest VCPU has been paused by the hypervisor. */
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| 113 | #define GIM_KVM_SYSTEM_TIME_FLAGS_GUEST_PAUSED RT_BIT(1)
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| 114 | /** */
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| 115 |
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| 116 | /** @name KVM MSR - System time (MSR_GIM_KVM_SYSTEM_TIME and
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| 117 | * MSR_GIM_KVM_SYSTEM_TIME_OLD).
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| 118 | * @{
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| 119 | */
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| 120 | /** The system-time enable bit. */
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| 121 | #define MSR_GIM_KVM_SYSTEM_TIME_ENABLE_BIT RT_BIT_64(0)
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| 122 | /** Whether the system-time struct. is enabled or not. */
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| 123 | #define MSR_GIM_KVM_SYSTEM_TIME_IS_ENABLED(a) RT_BOOL((a) & MSR_GIM_KVM_SYSTEM_TIME_ENABLE_BIT)
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| 124 | /** Guest-physical address of the system-time struct. */
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| 125 | #define MSR_GIM_KVM_SYSTEM_TIME_GUEST_GPA(a) ((a) & ~MSR_GIM_KVM_SYSTEM_TIME_ENABLE_BIT)
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| 126 | /** @} */
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| 127 |
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| 128 | /** @name KVM MSR - Wall clock (MSR_GIM_KVM_WALL_CLOCK and
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| 129 | * MSR_GIM_KVM_WALL_CLOCK_OLD).
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| 130 | * @{
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| 131 | */
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| 132 | /** Guest-physical address of the wall-clock struct. */
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| 133 | #define MSR_GIM_KVM_WALL_CLOCK_GUEST_GPA(a) (a)
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| 134 | /** @} */
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| 135 |
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| 136 |
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| 137 | /** @name KVM Hypercall operations.
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| 138 | * @{ */
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| 139 | #define KVM_HYPERCALL_OP_VAPIC_POLL_IRQ 1
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| 140 | #define KVM_HYPERCALL_OP_MMU 2
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| 141 | #define KVM_HYPERCALL_OP_FEATURES 3
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| 142 | #define KVM_HYPERCALL_OP_KICK_CPU 5
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| 143 | /** @} */
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| 144 |
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| 145 | /** @name KVM Hypercall return values.
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| 146 | * @{ */
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| 147 | /* Return values for hypercalls */
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| 148 | #define KVM_HYPERCALL_RET_SUCCESS 0
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| 149 | #define KVM_HYPERCALL_RET_ENOSYS (uint64_t)(-1000)
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| 150 | #define KVM_HYPERCALL_RET_EFAULT (uint64_t)(-14)
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| 151 | #define KVM_HYPERCALL_RET_E2BIG (uint64_t)(-7)
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| 152 | #define KVM_HYPERCALL_RET_EPERM (uint64_t)(-1)
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| 153 | /** @} */
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| 154 |
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| 155 | /**
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| 156 | * KVM per-VCPU system-time structure.
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| 157 | */
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| 158 | typedef struct GIMKVMSYSTEMTIME
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| 159 | {
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| 160 | /** Version (sequence number). */
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| 161 | uint32_t u32Version;
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| 162 | /** Alignment padding. */
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| 163 | uint32_t u32Padding0;
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| 164 | /** TSC time stamp. */
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| 165 | uint64_t u64Tsc;
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| 166 | /** System time in nanoseconds. */
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| 167 | uint64_t u64NanoTS;
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| 168 | /** TSC to system time scale factor. */
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| 169 | uint32_t u32TscScale;
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| 170 | /** TSC frequency shift. */
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| 171 | int8_t i8TscShift;
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| 172 | /** Clock source (GIM_KVM_SYSTEM_TIME_FLAGS_XXX) flags. */
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| 173 | uint8_t fFlags;
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| 174 | /** Alignment padding. */
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| 175 | uint8_t abPadding0[2];
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| 176 | } GIMKVMSYSTEMTIME;
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| 177 | /** Pointer to KVM system-time struct. */
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| 178 | typedef GIMKVMSYSTEMTIME *PGIMKVMSYSTEMTIME;
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| 179 | /** Pointer to a const KVM system-time struct. */
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| 180 | typedef GIMKVMSYSTEMTIME const *PCGIMKVMSYSTEMTIME;
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| 181 | AssertCompileSize(GIMKVMSYSTEMTIME, 32);
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| 182 |
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| 183 |
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| 184 | /**
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| 185 | * KVM per-VM wall-clock structure.
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| 186 | */
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| 187 | typedef struct GIMKVMWALLCLOCK
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| 188 | {
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| 189 | /** Version (sequence number). */
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| 190 | uint32_t u32Version;
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| 191 | /** Number of seconds since boot. */
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| 192 | uint32_t u32Sec;
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| 193 | /** Number of nanoseconds since boot. */
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| 194 | uint32_t u32Nano;
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| 195 | } GIMKVMWALLCLOCK;
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| 196 | /** Pointer to KVM wall-clock struct. */
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| 197 | typedef GIMKVMWALLCLOCK *PGIMKVMWALLCLOCK;
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| 198 | /** Pointer to a const KVM wall-clock struct. */
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| 199 | typedef GIMKVMWALLCLOCK const *PCGIMKVMWALLCLOCK;
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| 200 | AssertCompileSize(GIMKVMWALLCLOCK, 12);
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| 201 |
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| 202 |
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| 203 | /**
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| 204 | * GIM KVM VM instance data.
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| 205 | * Changes to this must checked against the padding of the gim union in VM!
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| 206 | */
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| 207 | typedef struct GIMKVM
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| 208 | {
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| 209 | /** Wall-clock MSR. */
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| 210 | uint64_t u64WallClockMsr;
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| 211 | /** CPUID features: Basic. */
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| 212 | uint32_t uBaseFeat;
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| 213 | /** Whether GIM needs to trap \#UD exceptions. */
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| 214 | bool fTrapXcptUD;
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| 215 | /** Disassembler opcode of hypercall instruction native for this host CPU. */
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| 216 | uint16_t uOpcodeNative;
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| 217 | /** Native hypercall opcode bytes. Use for replacing. */
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| 218 | uint8_t abOpcodeNative[3];
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| 219 | /** Alignment padding. */
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| 220 | uint8_t abPadding[5];
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| 221 | /** The TSC frequency (in HZ) reported to the guest. */
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| 222 | uint64_t cTscTicksPerSecond;
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| 223 | } GIMKVM;
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| 224 | /** Pointer to per-VM GIM KVM instance data. */
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| 225 | typedef GIMKVM *PGIMKVM;
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| 226 | /** Pointer to const per-VM GIM KVM instance data. */
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| 227 | typedef GIMKVM const *PCGIMKVM;
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| 228 |
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| 229 | /**
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| 230 | * GIM KVMV VCPU instance data.
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| 231 | * Changes to this must checked against the padding of the gim union in VMCPU!
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| 232 | */
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| 233 | typedef struct GIMKVMCPU
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| 234 | {
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| 235 | /** System-time MSR. */
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| 236 | uint64_t u64SystemTimeMsr;
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| 237 | /** The guest-physical address of the system-time struct. */
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| 238 | RTGCPHYS GCPhysSystemTime;
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| 239 | /** The version (sequence number) of the system-time struct. */
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| 240 | uint32_t u32SystemTimeVersion;
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| 241 | /** The guest TSC value while enabling the system-time MSR. */
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| 242 | uint64_t uTsc;
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| 243 | /** The guest virtual time while enabling the system-time MSR. */
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| 244 | uint64_t uVirtNanoTS;
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| 245 | /** The flags of the system-time struct. */
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| 246 | uint8_t fSystemTimeFlags;
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| 247 | } GIMKVMCPU;
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| 248 | /** Pointer to per-VCPU GIM KVM instance data. */
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| 249 | typedef GIMKVMCPU *PGIMKVMCPU;
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| 250 | /** Pointer to const per-VCPU GIM KVM instance data. */
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| 251 | typedef GIMKVMCPU const *PCGIMKVMCPU;
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| 252 |
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| 253 |
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| 254 | RT_C_DECLS_BEGIN
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| 255 |
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| 256 | #ifdef IN_RING3
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| 257 | VMMR3_INT_DECL(int) gimR3KvmInit(PVM pVM);
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| 258 | VMMR3_INT_DECL(int) gimR3KvmInitCompleted(PVM pVM);
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| 259 | VMMR3_INT_DECL(int) gimR3KvmTerm(PVM pVM);
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| 260 | VMMR3_INT_DECL(void) gimR3KvmRelocate(PVM pVM, RTGCINTPTR offDelta);
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| 261 | VMMR3_INT_DECL(void) gimR3KvmReset(PVM pVM);
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| 262 | VMMR3_INT_DECL(int) gimR3KvmSave(PVM pVM, PSSMHANDLE pSSM);
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| 263 | VMMR3_INT_DECL(int) gimR3KvmLoad(PVM pVM, PSSMHANDLE pSSM);
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| 264 |
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| 265 | VMMR3_INT_DECL(int) gimR3KvmDisableSystemTime(PVM pVM);
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| 266 | VMMR3_INT_DECL(int) gimR3KvmEnableSystemTime(PVM pVM, PVMCPU pVCpu, uint64_t uMsrSystemTime);
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| 267 | VMMR3_INT_DECL(int) gimR3KvmEnableWallClock(PVM pVM, RTGCPHYS GCPhysSysTime);
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| 268 | #endif /* IN_RING3 */
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| 269 |
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| 270 | VMM_INT_DECL(bool) gimKvmIsParavirtTscEnabled(PVMCC pVM);
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| 271 | VMM_INT_DECL(bool) gimKvmAreHypercallsEnabled(PVMCPU pVCpu);
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| 272 | VMM_INT_DECL(VBOXSTRICTRC) gimKvmHypercall(PVMCPUCC pVCpu, PCPUMCTX pCtx);
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| 273 | VMM_INT_DECL(VBOXSTRICTRC) gimKvmReadMsr(PVMCPUCC pVCpu, uint32_t idMsr, PCCPUMMSRRANGE pRange, uint64_t *puValue);
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| 274 | VMM_INT_DECL(VBOXSTRICTRC) gimKvmWriteMsr(PVMCPUCC pVCpu, uint32_t idMsr, PCCPUMMSRRANGE pRange, uint64_t uRawValue);
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| 275 | VMM_INT_DECL(bool) gimKvmShouldTrapXcptUD(PVM pVM);
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| 276 | VMM_INT_DECL(VBOXSTRICTRC) gimKvmXcptUD(PVMCC pVM, PVMCPUCC pVCpu, PCPUMCTX pCtx, PDISCPUSTATE pDis, uint8_t *pcbInstr);
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| 277 | VMM_INT_DECL(VBOXSTRICTRC) gimKvmHypercallEx(PVMCPUCC pVCpu, PCPUMCTX pCtx, unsigned uDisOpcode, uint8_t cbInstr);
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| 278 |
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| 279 | RT_C_DECLS_END
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| 280 |
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| 281 | #endif /* !VMM_INCLUDED_SRC_include_GIMKvmInternal_h */
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| 282 |
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