| 1 | /* $Id: SELMInternal.h 76585 2019-01-01 06:31:29Z vboxsync $ */
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| 2 | /** @file
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| 3 | * SELM - 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) 2006-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef VMM_INCLUDED_SRC_include_SELMInternal_h
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| 19 | #define VMM_INCLUDED_SRC_include_SELMInternal_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #include <VBox/cdefs.h>
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| 25 | #include <VBox/types.h>
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| 26 | #include <VBox/vmm/stam.h>
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| 27 | #include <VBox/vmm/cpum.h>
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| 28 | #include <VBox/vmm/pgm.h>
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| 29 | #include <VBox/log.h>
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| 30 | #include <iprt/x86.h>
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| 31 |
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| 32 |
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| 33 |
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| 34 | /** @defgroup grp_selm_int Internals
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| 35 | * @ingroup grp_selm
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| 36 | * @internal
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 | /** Enable or disable tracking of Shadow GDT/LDT/TSS.
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| 41 | * @{
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| 42 | */
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| 43 | #if defined(VBOX_WITH_RAW_MODE) || defined(DOXYGEN_RUNNING)
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| 44 | # define SELM_TRACK_SHADOW_GDT_CHANGES
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| 45 | # define SELM_TRACK_SHADOW_LDT_CHANGES
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| 46 | # define SELM_TRACK_SHADOW_TSS_CHANGES
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| 47 | #endif
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| 48 | /** @} */
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| 49 |
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| 50 | /** Enable or disable tracking of Guest GDT/LDT/TSS.
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| 51 | * @{
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| 52 | */
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| 53 | #if defined(VBOX_WITH_RAW_MODE) || defined(DOXYGEN_RUNNING)
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| 54 | # define SELM_TRACK_GUEST_GDT_CHANGES
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| 55 | # define SELM_TRACK_GUEST_LDT_CHANGES
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| 56 | # define SELM_TRACK_GUEST_TSS_CHANGES
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| 57 | #endif
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| 58 | /** @} */
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| 59 |
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| 60 |
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| 61 | /** The number of GDTS allocated for our GDT. (full size) */
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| 62 | #define SELM_GDT_ELEMENTS 8192
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| 63 |
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| 64 | /** aHyperSel index to retrieve hypervisor selectors */
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| 65 | /** The Flat CS selector used by the VMM inside the GC. */
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| 66 | #define SELM_HYPER_SEL_CS 0
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| 67 | /** The Flat DS selector used by the VMM inside the GC. */
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| 68 | #define SELM_HYPER_SEL_DS 1
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| 69 | /** The 64-bit mode CS selector used by the VMM inside the GC. */
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| 70 | #define SELM_HYPER_SEL_CS64 2
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| 71 | /** The TSS selector used by the VMM inside the GC. */
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| 72 | #define SELM_HYPER_SEL_TSS 3
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| 73 | /** The TSS selector for taking trap 08 (\#DF). */
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| 74 | #define SELM_HYPER_SEL_TSS_TRAP08 4
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| 75 | /** Number of GDTs we need for internal use */
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| 76 | #define SELM_HYPER_SEL_MAX (SELM_HYPER_SEL_TSS_TRAP08 + 1)
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| 77 |
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| 78 |
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| 79 | /** Default GDT selectors we use for the hypervisor. */
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| 80 | #define SELM_HYPER_DEFAULT_SEL_CS ((SELM_GDT_ELEMENTS - 0x1) << 3)
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| 81 | #define SELM_HYPER_DEFAULT_SEL_DS ((SELM_GDT_ELEMENTS - 0x2) << 3)
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| 82 | #define SELM_HYPER_DEFAULT_SEL_CS64 ((SELM_GDT_ELEMENTS - 0x3) << 3)
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| 83 | #define SELM_HYPER_DEFAULT_SEL_TSS ((SELM_GDT_ELEMENTS - 0x4) << 3)
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| 84 | #define SELM_HYPER_DEFAULT_SEL_TSS_TRAP08 ((SELM_GDT_ELEMENTS - 0x5) << 3)
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| 85 | /** The lowest value default we use. */
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| 86 | #define SELM_HYPER_DEFAULT_BASE SELM_HYPER_DEFAULT_SEL_TSS_TRAP08
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| 87 |
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| 88 | /**
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| 89 | * Converts a SELM pointer into a VM pointer.
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| 90 | * @returns Pointer to the VM structure the SELM is part of.
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| 91 | * @param pSELM Pointer to SELM instance data.
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| 92 | */
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| 93 | #define SELM2VM(pSELM) ( (PVM)((char *)pSELM - pSELM->offVM) )
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| 94 |
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| 95 |
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| 96 |
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| 97 | /**
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| 98 | * SELM Data (part of VM)
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| 99 | */
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| 100 | typedef struct SELM
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| 101 | {
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| 102 | /** Offset to the VM structure.
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| 103 | * See SELM2VM(). */
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| 104 | RTINT offVM;
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| 105 |
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| 106 | /** Flat CS, DS, 64 bit mode CS, TSS & trap 8 TSS. */
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| 107 | RTSEL aHyperSel[SELM_HYPER_SEL_MAX];
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| 108 |
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| 109 | /** @name GDT
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| 110 | * @{ */
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| 111 | /** Shadow GDT virtual write access handler type. */
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| 112 | PGMVIRTHANDLERTYPE hShadowGdtWriteHandlerType;
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| 113 | /** Guest GDT virtual write access handler type. */
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| 114 | PGMVIRTHANDLERTYPE hGuestGdtWriteHandlerType;
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| 115 | /** Pointer to the GCs - R3 Ptr.
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| 116 | * This size is governed by SELM_GDT_ELEMENTS. */
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| 117 | R3PTRTYPE(PX86DESC) paGdtR3;
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| 118 | /** Pointer to the GCs - RC Ptr.
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| 119 | * This is not initialized until the first relocation because it's used to
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| 120 | * check if the shadow GDT virtual handler requires deregistration. */
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| 121 | RCPTRTYPE(PX86DESC) paGdtRC;
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| 122 | /** Current (last) Guest's GDTR.
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| 123 | * The pGdt member is set to RTRCPTR_MAX if we're not monitoring the guest GDT. */
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| 124 | VBOXGDTR GuestGdtr;
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| 125 | /** The current (last) effective Guest GDT size. */
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| 126 | uint32_t cbEffGuestGdtLimit;
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| 127 | /** Indicates that the Guest GDT access handler have been registered. */
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| 128 | bool fGDTRangeRegistered;
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| 129 | /** @} */
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| 130 | bool padding0[3];
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| 131 |
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| 132 | /** @name LDT
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| 133 | * @{ */
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| 134 | /** Shadow LDT virtual write access handler type. */
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| 135 | PGMVIRTHANDLERTYPE hShadowLdtWriteHandlerType;
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| 136 | /** Guest LDT virtual write access handler type. */
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| 137 | PGMVIRTHANDLERTYPE hGuestLdtWriteHandlerType;
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| 138 | /** R3 pointer to the LDT shadow area in HMA. */
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| 139 | R3PTRTYPE(void *) pvLdtR3;
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| 140 | /** RC pointer to the LDT shadow area in HMA. */
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| 141 | RCPTRTYPE(void *) pvLdtRC;
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| 142 | #if GC_ARCH_BITS == 64
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| 143 | RTRCPTR padding1;
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| 144 | #endif
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| 145 | /** The address of the guest LDT.
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| 146 | * RTRCPTR_MAX if not monitored. */
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| 147 | RTGCPTR GCPtrGuestLdt;
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| 148 | /** Current LDT limit, both Guest and Shadow. */
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| 149 | uint32_t cbLdtLimit;
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| 150 | /** Current LDT offset relative to pvLdtR3/pvLdtRC. */
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| 151 | uint32_t offLdtHyper;
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| 152 | #if HC_ARCH_BITS == 32 && GC_ARCH_BITS == 64
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| 153 | uint32_t padding2[2];
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| 154 | #endif
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| 155 | /** @} */
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| 156 |
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| 157 | /** @name TSS
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| 158 | * @{ */
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| 159 | /** TSS. (This is 16 byte aligned!)
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| 160 | * @todo I/O bitmap & interrupt redirection table? */
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| 161 | VBOXTSS Tss;
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| 162 | /** TSS for trap 08 (\#DF). */
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| 163 | VBOXTSS TssTrap08;
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| 164 | /** Shadow TSS virtual write access handler type. */
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| 165 | PGMVIRTHANDLERTYPE hShadowTssWriteHandlerType;
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| 166 | /** Guerst TSS virtual write access handler type. */
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| 167 | PGMVIRTHANDLERTYPE hGuestTssWriteHandlerType;
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| 168 | /** Monitored shadow TSS address. */
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| 169 | RCPTRTYPE(void *) pvMonShwTssRC;
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| 170 | #if GC_ARCH_BITS == 64
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| 171 | RTRCPTR padding3;
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| 172 | #endif
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| 173 | /** GC Pointer to the current Guest's TSS.
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| 174 | * RTRCPTR_MAX if not monitored. */
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| 175 | RTGCPTR GCPtrGuestTss;
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| 176 | /** The size of the guest TSS. */
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| 177 | uint32_t cbGuestTss;
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| 178 | /** Set if it's a 32-bit TSS. */
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| 179 | bool fGuestTss32Bit;
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| 180 | /** Indicates whether the TSS stack selector & base address need to be refreshed. */
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| 181 | bool fSyncTSSRing0Stack;
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| 182 | /** The size of the Guest's TSS part we're monitoring. */
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| 183 | uint32_t cbMonitoredGuestTss;
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| 184 | /** The guest TSS selector at last sync (part of monitoring).
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| 185 | * Contains RTSEL_MAX if not set. */
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| 186 | RTSEL GCSelTss;
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| 187 | /** The last known offset of the I/O bitmap.
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| 188 | * This is only used if we monitor the bitmap. */
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| 189 | uint16_t offGuestIoBitmap;
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| 190 | /** @} */
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| 191 | uint16_t padding4[3];
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| 192 |
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| 193 | /** SELMR3UpdateFromCPUM() profiling. */
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| 194 | STAMPROFILE StatUpdateFromCPUM;
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| 195 | /** SELMR3SyncTSS() profiling. */
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| 196 | STAMPROFILE StatTSSSync;
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| 197 |
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| 198 | /** GC: The number of handled writes to the Guest's GDT. */
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| 199 | STAMCOUNTER StatRCWriteGuestGDTHandled;
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| 200 | /** GC: The number of unhandled write to the Guest's GDT. */
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| 201 | STAMCOUNTER StatRCWriteGuestGDTUnhandled;
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| 202 | /** GC: The number of times writes to Guest's LDT was detected. */
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| 203 | STAMCOUNTER StatRCWriteGuestLDT;
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| 204 | /** GC: The number of handled writes to the Guest's TSS. */
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| 205 | STAMCOUNTER StatRCWriteGuestTSSHandled;
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| 206 | /** GC: The number of handled writes to the Guest's TSS where we detected a change. */
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| 207 | STAMCOUNTER StatRCWriteGuestTSSHandledChanged;
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| 208 | /** GC: The number of handled redir writes to the Guest's TSS where we detected a change. */
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| 209 | STAMCOUNTER StatRCWriteGuestTSSRedir;
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| 210 | /** GC: The number of unhandled writes to the Guest's TSS. */
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| 211 | STAMCOUNTER StatRCWriteGuestTSSUnhandled;
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| 212 | /** The number of times we had to relocate our hypervisor selectors. */
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| 213 | STAMCOUNTER StatHyperSelsChanged;
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| 214 | /** The number of times we had find free hypervisor selectors. */
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| 215 | STAMCOUNTER StatScanForHyperSels;
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| 216 | /** Counts the times we detected state selectors in SELMR3UpdateFromCPUM. */
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| 217 | STAMCOUNTER aStatDetectedStaleSReg[X86_SREG_COUNT];
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| 218 | /** Counts the times we were called with already state selectors in
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| 219 | * SELMR3UpdateFromCPUM. */
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| 220 | STAMCOUNTER aStatAlreadyStaleSReg[X86_SREG_COUNT];
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| 221 | /** Counts the times we found a stale selector becomming valid again. */
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| 222 | STAMCOUNTER StatStaleToUnstaleSReg;
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| 223 | #ifdef VBOX_WITH_STATISTICS
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| 224 | /** Times we updated hidden selector registers in CPUMR3UpdateFromCPUM. */
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| 225 | STAMCOUNTER aStatUpdatedSReg[X86_SREG_COUNT];
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| 226 | STAMCOUNTER StatLoadHidSelGst;
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| 227 | STAMCOUNTER StatLoadHidSelShw;
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| 228 | #endif
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| 229 | STAMCOUNTER StatLoadHidSelReadErrors;
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| 230 | STAMCOUNTER StatLoadHidSelGstNoGood;
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| 231 | } SELM, *PSELM;
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| 232 |
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| 233 | RT_C_DECLS_BEGIN
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| 234 |
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| 235 | PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestGDTWriteHandler;
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| 236 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestGDTWritePfHandler;
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| 237 | PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestLDTWriteHandler;
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| 238 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestLDTWritePfHandler;
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| 239 | PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestTSSWriteHandler;
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| 240 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestTSSWritePfHandler;
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| 241 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowGDTWritePfHandler;
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| 242 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowLDTWritePfHandler;
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| 243 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowTSSWritePfHandler;
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| 244 |
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| 245 | void selmRCSyncGdtSegRegs(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, unsigned iGDTEntry);
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| 246 | void selmRCGuestGdtPreWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestGdt, uint32_t cbWrite, PCPUMCTX pCtx);
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| 247 | VBOXSTRICTRC selmRCGuestGdtPostWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestTss, uint32_t cbWrite, PCPUMCTX pCtx);
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| 248 | VBOXSTRICTRC selmRCGuestTssPostWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestTss, uint32_t cbWrite);
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| 249 | void selmSetRing1Stack(PVM pVM, uint32_t ss, RTGCPTR32 esp);
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| 250 | #ifdef VBOX_WITH_RAW_RING1
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| 251 | void selmSetRing2Stack(PVM pVM, uint32_t ss, RTGCPTR32 esp);
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| 252 | #endif
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| 253 |
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| 254 | RT_C_DECLS_END
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| 255 |
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| 256 | /** @} */
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| 257 |
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| 258 | #endif /* !VMM_INCLUDED_SRC_include_SELMInternal_h */
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