| 1 | /* $Id: TRPMInternal.h 76585 2019-01-01 06:31:29Z vboxsync $ */
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| 2 | /** @file
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| 3 | * TRPM - 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_TRPMInternal_h
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| 19 | #define VMM_INCLUDED_SRC_include_TRPMInternal_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 |
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| 30 | RT_C_DECLS_BEGIN
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| 31 |
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| 32 |
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| 33 | /** @defgroup grp_trpm_int Internals
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| 34 | * @ingroup grp_trpm
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| 35 | * @internal
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| 36 | * @{
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| 37 | */
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| 38 |
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| 39 |
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| 40 | #ifdef VBOX_WITH_RAW_MODE
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| 41 | /** Enable or disable tracking of Guest's IDT. */
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| 42 | # define TRPM_TRACK_GUEST_IDT_CHANGES
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| 43 | /** Enable or disable tracking of Shadow IDT. */
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| 44 | # define TRPM_TRACK_SHADOW_IDT_CHANGES
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| 45 | #endif
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| 46 |
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| 47 |
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| 48 | /** Enable to allow trap forwarding in GC. */
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| 49 | #ifdef VBOX_WITH_RAW_MODE
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| 50 | # define TRPM_FORWARD_TRAPS_IN_GC
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| 51 | #endif
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| 52 |
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| 53 | /** First interrupt handler. Used for validating input. */
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| 54 | #define TRPM_HANDLER_INT_BASE 0x20
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| 55 |
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| 56 |
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| 57 | /** @name TRPMGCTrapIn* flags.
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| 58 | * The lower bits are offsets into the CPUMCTXCORE structure.
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| 59 | * @{ */
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| 60 | /** The mask for the operation. */
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| 61 | #define TRPM_TRAP_IN_OP_MASK 0xffff
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| 62 | /** Traps on MOV GS, eax. */
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| 63 | #define TRPM_TRAP_IN_MOV_GS 1
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| 64 | /** Traps on MOV FS, eax. */
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| 65 | #define TRPM_TRAP_IN_MOV_FS 2
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| 66 | /** Traps on MOV ES, eax. */
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| 67 | #define TRPM_TRAP_IN_MOV_ES 3
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| 68 | /** Traps on MOV DS, eax. */
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| 69 | #define TRPM_TRAP_IN_MOV_DS 4
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| 70 | /** Traps on IRET. */
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| 71 | #define TRPM_TRAP_IN_IRET 5
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| 72 | /** Set if this is a V86 resume. */
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| 73 | #define TRPM_TRAP_IN_V86 RT_BIT(30)
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| 74 | /** @} */
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| 75 |
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| 76 |
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| 77 | #if 0 /* not used */
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| 78 | /**
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| 79 | * Converts a TRPM pointer into a VM pointer.
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| 80 | * @returns Pointer to the VM structure the TRPM is part of.
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| 81 | * @param pTRPM Pointer to TRPM instance data.
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| 82 | */
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| 83 | #define TRPM_2_VM(pTRPM) ( (PVM)((uint8_t *)(pTRPM) - (pTRPM)->offVM) )
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| 84 | #endif
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| 85 |
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| 86 | /**
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| 87 | * Converts a TRPM pointer into a TRPMCPU pointer.
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| 88 | * @returns Pointer to the VM structure the TRPMCPU is part of.
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| 89 | * @param pTrpmCpu Pointer to TRPMCPU instance data.
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| 90 | * @remarks Raw-mode only, not SMP safe.
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| 91 | */
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| 92 | #define TRPM_2_TRPMCPU(pTrpmCpu) ( (PTRPMCPU)((uint8_t *)(pTrpmCpu) + (pTrpmCpu)->offTRPMCPU) )
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| 93 |
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| 94 |
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| 95 | /**
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| 96 | * TRPM Data (part of VM)
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| 97 | *
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| 98 | * IMPORTANT! Keep the nasm version of this struct up-to-date.
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| 99 | */
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| 100 | typedef struct TRPM
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| 101 | {
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| 102 | /** Offset to the VM structure.
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| 103 | * See TRPM_2_VM(). */
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| 104 | RTINT offVM;
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| 105 | /** Offset to the TRPMCPU structure.
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| 106 | * See TRPM2TRPMCPU(). */
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| 107 | RTINT offTRPMCPU;
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| 108 |
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| 109 | /** Whether monitoring of the guest IDT is enabled or not.
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| 110 | *
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| 111 | * This configuration option is provided for speeding up guest like Solaris
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| 112 | * that put the IDT on the same page as a whole lot of other data that is
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| 113 | * frequently updated. The updates will cause \#PFs and have to be interpreted
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| 114 | * by PGMInterpretInstruction which is slow compared to raw execution.
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| 115 | *
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| 116 | * If the guest is well behaved and doesn't change the IDT after loading it,
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| 117 | * there is no problem with dropping the IDT monitoring.
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| 118 | *
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| 119 | * @cfgm{/TRPM/SafeToDropGuestIDTMonitoring, boolean, defaults to false.}
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| 120 | */
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| 121 | bool fSafeToDropGuestIDTMonitoring;
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| 122 |
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| 123 | /** Padding to get the IDTs at a 16 byte alignment. */
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| 124 | uint8_t abPadding1[7];
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| 125 | /** IDTs. Aligned at 16 byte offset for speed. */
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| 126 | VBOXIDTE aIdt[256];
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| 127 |
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| 128 | /** Bitmap for IDTEs that contain PATM handlers. (needed for relocation) */
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| 129 | uint32_t au32IdtPatched[8];
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| 130 |
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| 131 | /** Temporary Hypervisor trap handlers.
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| 132 | * NULL means default action. */
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| 133 | RCPTRTYPE(void *) aTmpTrapHandlers[256];
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| 134 |
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| 135 | /** RC Pointer to the IDT shadow area (aIdt) in HMA. */
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| 136 | RCPTRTYPE(void *) pvMonShwIdtRC;
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| 137 | /** padding. */
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| 138 | uint8_t au8Padding[2];
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| 139 | /** Current (last) Guest's IDTR. */
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| 140 | VBOXIDTR GuestIdtr;
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| 141 | /** Shadow IDT virtual write access handler type. */
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| 142 | PGMVIRTHANDLERTYPE hShadowIdtWriteHandlerType;
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| 143 | /** Guest IDT virtual write access handler type. */
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| 144 | PGMVIRTHANDLERTYPE hGuestIdtWriteHandlerType;
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| 145 |
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| 146 | /** Checked trap & interrupt handler array */
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| 147 | RCPTRTYPE(void *) aGuestTrapHandler[256];
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| 148 |
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| 149 | /** RC: The number of times writes to the Guest IDT were detected. */
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| 150 | STAMCOUNTER StatRCWriteGuestIDTFault;
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| 151 | STAMCOUNTER StatRCWriteGuestIDTHandled;
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| 152 |
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| 153 | /** HC: Profiling of the TRPMR3SyncIDT() method. */
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| 154 | STAMPROFILE StatSyncIDT;
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| 155 | /** GC: Statistics for the trap handlers. */
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| 156 | STAMPROFILEADV aStatGCTraps[0x14];
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| 157 |
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| 158 | STAMPROFILEADV StatForwardProfR3;
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| 159 | STAMPROFILEADV StatForwardProfRZ;
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| 160 | STAMCOUNTER StatForwardFailNoHandler;
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| 161 | STAMCOUNTER StatForwardFailPatchAddr;
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| 162 | STAMCOUNTER StatForwardFailR3;
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| 163 | STAMCOUNTER StatForwardFailRZ;
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| 164 |
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| 165 | STAMPROFILE StatTrap0dDisasm;
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| 166 | STAMCOUNTER StatTrap0dRdTsc; /**< Number of RDTSC \#GPs. */
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| 167 |
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| 168 | #ifdef VBOX_WITH_STATISTICS
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| 169 | /** Statistics for interrupt handlers (allocated on the hypervisor heap) - R3
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| 170 | * pointer. */
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| 171 | R3PTRTYPE(PSTAMCOUNTER) paStatForwardedIRQR3;
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| 172 | /** Statistics for interrupt handlers - RC pointer. */
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| 173 | RCPTRTYPE(PSTAMCOUNTER) paStatForwardedIRQRC;
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| 174 |
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| 175 | /** Host interrupt statistics (allocated on the hypervisor heap) - RC ptr. */
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| 176 | RCPTRTYPE(PSTAMCOUNTER) paStatHostIrqRC;
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| 177 | /** Host interrupt statistics (allocated on the hypervisor heap) - R3 ptr. */
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| 178 | R3PTRTYPE(PSTAMCOUNTER) paStatHostIrqR3;
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| 179 | #endif
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| 180 | } TRPM;
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| 181 | AssertCompileMemberAlignment(TRPM, GuestIdtr.pIdt, 8);
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| 182 |
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| 183 | /** Pointer to TRPM Data. */
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| 184 | typedef TRPM *PTRPM;
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| 185 |
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| 186 |
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| 187 | /**
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| 188 | * Converts a TRPMCPU pointer into a VM pointer.
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| 189 | * @returns Pointer to the VM structure the TRPMCPU is part of.
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| 190 | * @param pTrpmCpu Pointer to TRPMCPU instance data.
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| 191 | */
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| 192 | #define TRPMCPU_2_VM(pTrpmCpu) ( (PVM)((uint8_t *)(pTrpmCpu) - (pTrpmCpu)->offVM) )
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| 193 |
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| 194 | /**
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| 195 | * Converts a TRPMCPU pointer into a VMCPU pointer.
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| 196 | * @returns Pointer to the VMCPU structure the TRPMCPU is part of.
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| 197 | * @param pTrpmCpu Pointer to TRPMCPU instance data.
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| 198 | */
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| 199 | #define TRPMCPU_2_VMCPU(pTrpmCpu) ( (PVMCPU)((uint8_t *)(pTrpmCpu) - (pTrpmCpu)->offVMCpu) )
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| 200 |
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| 201 |
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| 202 | /**
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| 203 | * Per CPU data for TRPM.
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| 204 | */
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| 205 | typedef struct TRPMCPU
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| 206 | {
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| 207 | /** Offset into the VM structure.
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| 208 | * See TRPMCPU_2_VM(). */
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| 209 | uint32_t offVM;
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| 210 | /** Offset into the VMCPU structure.
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| 211 | * See TRPMCPU_2_VMCPU(). */
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| 212 | uint32_t offVMCpu;
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| 213 |
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| 214 | /** Active Interrupt or trap vector number.
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| 215 | * If not UINT32_MAX this indicates that we're currently processing a
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| 216 | * interrupt, trap, fault, abort, whatever which have arrived at that
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| 217 | * vector number.
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| 218 | */
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| 219 | uint32_t uActiveVector;
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| 220 |
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| 221 | /** Active trap type. */
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| 222 | TRPMEVENT enmActiveType;
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| 223 |
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| 224 | /** Errorcode for the active interrupt/trap. */
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| 225 | RTGCUINT uActiveErrorCode; /**< @todo don't use RTGCUINT */
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| 226 |
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| 227 | /** CR2 at the time of the active exception. */
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| 228 | RTGCUINTPTR uActiveCR2;
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| 229 |
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| 230 | /** Saved trap vector number. */
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| 231 | RTGCUINT uSavedVector; /**< @todo don't use RTGCUINT */
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| 232 |
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| 233 | /** Saved errorcode. */
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| 234 | RTGCUINT uSavedErrorCode;
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| 235 |
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| 236 | /** Saved cr2. */
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| 237 | RTGCUINTPTR uSavedCR2;
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| 238 |
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| 239 | /** Saved trap type. */
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| 240 | TRPMEVENT enmSavedType;
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| 241 |
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| 242 | /** Instruction length for software interrupts and software exceptions
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| 243 | * (\#BP, \#OF) */
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| 244 | uint8_t cbInstr;
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| 245 |
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| 246 | /** Saved instruction length. */
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| 247 | uint8_t cbSavedInstr;
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| 248 |
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| 249 | /** Padding. */
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| 250 | uint8_t au8Padding[2];
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| 251 |
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| 252 | /** Previous trap vector # - for debugging. */
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| 253 | RTGCUINT uPrevVector;
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| 254 | } TRPMCPU;
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| 255 |
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| 256 | /** Pointer to TRPMCPU Data. */
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| 257 | typedef TRPMCPU *PTRPMCPU;
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| 258 |
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| 259 |
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| 260 | PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) trpmGuestIDTWriteHandler;
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| 261 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) trpmRCGuestIDTWritePfHandler;
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| 262 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) trpmRCShadowIDTWritePfHandler;
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| 263 |
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| 264 | /**
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| 265 | * Clear guest trap/interrupt gate handler
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| 266 | *
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| 267 | * @returns VBox status code.
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| 268 | * @param pVM The cross context VM structure.
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| 269 | * @param iTrap Interrupt/trap number.
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| 270 | */
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| 271 | VMMDECL(int) trpmClearGuestTrapHandler(PVM pVM, unsigned iTrap);
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| 272 |
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| 273 |
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| 274 | #ifdef IN_RING3
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| 275 | int trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap);
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| 276 | #endif
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| 277 |
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| 278 |
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| 279 | #ifdef IN_RING0
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| 280 |
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| 281 | /**
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| 282 | * Calls the interrupt gate as if we received an interrupt while in Ring-0.
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| 283 | *
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| 284 | * @param uIP The interrupt gate IP.
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| 285 | * @param SelCS The interrupt gate CS.
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| 286 | * @param RSP The interrupt gate RSP. ~0 if no stack switch should take place. (only AMD64)
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| 287 | */
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| 288 | DECLASM(void) trpmR0DispatchHostInterrupt(RTR0UINTPTR uIP, RTSEL SelCS, RTR0UINTPTR RSP);
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| 289 |
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| 290 | /**
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| 291 | * Issues a software interrupt to the specified interrupt vector.
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| 292 | *
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| 293 | * @param uActiveVector The vector number.
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| 294 | */
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| 295 | DECLASM(void) trpmR0DispatchHostInterruptSimple(RTUINT uActiveVector);
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| 296 |
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| 297 | #endif /* IN_RING0 */
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| 298 |
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| 299 | /** @} */
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| 300 |
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| 301 | RT_C_DECLS_END
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| 302 |
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| 303 | #endif /* !VMM_INCLUDED_SRC_include_TRPMInternal_h */
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