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/* $Id: TRPMInternal.h $ */
/** @file
* TRPM - Internal header file.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef VMM_INCLUDED_SRC_include_TRPMInternal_h
#define VMM_INCLUDED_SRC_include_TRPMInternal_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/cdefs.h>
#include <VBox/types.h>
#include <VBox/vmm/stam.h>
#include <VBox/vmm/cpum.h>
#include <VBox/vmm/pgm.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_trpm_int Internals
* @ingroup grp_trpm
* @internal
* @{
*/
#ifdef VBOX_WITH_RAW_MODE
/** Enable or disable tracking of Guest's IDT. */
# define TRPM_TRACK_GUEST_IDT_CHANGES
/** Enable or disable tracking of Shadow IDT. */
# define TRPM_TRACK_SHADOW_IDT_CHANGES
#endif
/** Enable to allow trap forwarding in GC. */
#ifdef VBOX_WITH_RAW_MODE
# define TRPM_FORWARD_TRAPS_IN_GC
#endif
/** First interrupt handler. Used for validating input. */
#define TRPM_HANDLER_INT_BASE 0x20
/** @name TRPMGCTrapIn* flags.
* The lower bits are offsets into the CPUMCTXCORE structure.
* @{ */
/** The mask for the operation. */
#define TRPM_TRAP_IN_OP_MASK 0xffff
/** Traps on MOV GS, eax. */
#define TRPM_TRAP_IN_MOV_GS 1
/** Traps on MOV FS, eax. */
#define TRPM_TRAP_IN_MOV_FS 2
/** Traps on MOV ES, eax. */
#define TRPM_TRAP_IN_MOV_ES 3
/** Traps on MOV DS, eax. */
#define TRPM_TRAP_IN_MOV_DS 4
/** Traps on IRET. */
#define TRPM_TRAP_IN_IRET 5
/** Set if this is a V86 resume. */
#define TRPM_TRAP_IN_V86 RT_BIT(30)
/** @} */
#if 0 /* not used */
/**
* Converts a TRPM pointer into a VM pointer.
* @returns Pointer to the VM structure the TRPM is part of.
* @param pTRPM Pointer to TRPM instance data.
*/
#define TRPM_2_VM(pTRPM) ( (PVM)((uint8_t *)(pTRPM) - (pTRPM)->offVM) )
#endif
/**
* Converts a TRPM pointer into a TRPMCPU pointer.
* @returns Pointer to the VM structure the TRPMCPU is part of.
* @param pTrpmCpu Pointer to TRPMCPU instance data.
* @remarks Raw-mode only, not SMP safe.
*/
#define TRPM_2_TRPMCPU(pTrpmCpu) ( (PTRPMCPU)((uint8_t *)(pTrpmCpu) + (pTrpmCpu)->offTRPMCPU) )
/**
* TRPM Data (part of VM)
*
* IMPORTANT! Keep the nasm version of this struct up-to-date.
*/
typedef struct TRPM
{
/** Offset to the VM structure.
* See TRPM_2_VM(). */
RTINT offVM;
/** Offset to the TRPMCPU structure.
* See TRPM2TRPMCPU(). */
RTINT offTRPMCPU;
/** Whether monitoring of the guest IDT is enabled or not.
*
* This configuration option is provided for speeding up guest like Solaris
* that put the IDT on the same page as a whole lot of other data that is
* frequently updated. The updates will cause \#PFs and have to be interpreted
* by PGMInterpretInstruction which is slow compared to raw execution.
*
* If the guest is well behaved and doesn't change the IDT after loading it,
* there is no problem with dropping the IDT monitoring.
*
* @cfgm{/TRPM/SafeToDropGuestIDTMonitoring, boolean, defaults to false.}
*/
bool fSafeToDropGuestIDTMonitoring;
/** Padding to get the IDTs at a 16 byte alignment. */
uint8_t abPadding1[7];
/** IDTs. Aligned at 16 byte offset for speed. */
VBOXIDTE aIdt[256];
/** Bitmap for IDTEs that contain PATM handlers. (needed for relocation) */
uint32_t au32IdtPatched[8];
/** Temporary Hypervisor trap handlers.
* NULL means default action. */
RCPTRTYPE(void *) aTmpTrapHandlers[256];
/** RC Pointer to the IDT shadow area (aIdt) in HMA. */
RCPTRTYPE(void *) pvMonShwIdtRC;
/** padding. */
uint8_t au8Padding[2];
/** Current (last) Guest's IDTR. */
VBOXIDTR GuestIdtr;
/** Shadow IDT virtual write access handler type. */
PGMVIRTHANDLERTYPE hShadowIdtWriteHandlerType;
/** Guest IDT virtual write access handler type. */
PGMVIRTHANDLERTYPE hGuestIdtWriteHandlerType;
/** Checked trap & interrupt handler array */
RCPTRTYPE(void *) aGuestTrapHandler[256];
/** RC: The number of times writes to the Guest IDT were detected. */
STAMCOUNTER StatRCWriteGuestIDTFault;
STAMCOUNTER StatRCWriteGuestIDTHandled;
/** HC: Profiling of the TRPMR3SyncIDT() method. */
STAMPROFILE StatSyncIDT;
/** GC: Statistics for the trap handlers. */
STAMPROFILEADV aStatGCTraps[0x14];
STAMPROFILEADV StatForwardProfR3;
STAMPROFILEADV StatForwardProfRZ;
STAMCOUNTER StatForwardFailNoHandler;
STAMCOUNTER StatForwardFailPatchAddr;
STAMCOUNTER StatForwardFailR3;
STAMCOUNTER StatForwardFailRZ;
STAMPROFILE StatTrap0dDisasm;
STAMCOUNTER StatTrap0dRdTsc; /**< Number of RDTSC \#GPs. */
#ifdef VBOX_WITH_STATISTICS
/** Statistics for interrupt handlers (allocated on the hypervisor heap) - R3
* pointer. */
R3PTRTYPE(PSTAMCOUNTER) paStatForwardedIRQR3;
/** Statistics for interrupt handlers - RC pointer. */
RCPTRTYPE(PSTAMCOUNTER) paStatForwardedIRQRC;
/** Host interrupt statistics (allocated on the hypervisor heap) - RC ptr. */
RCPTRTYPE(PSTAMCOUNTER) paStatHostIrqRC;
/** Host interrupt statistics (allocated on the hypervisor heap) - R3 ptr. */
R3PTRTYPE(PSTAMCOUNTER) paStatHostIrqR3;
#endif
} TRPM;
AssertCompileMemberAlignment(TRPM, GuestIdtr.pIdt, 8);
/** Pointer to TRPM Data. */
typedef TRPM *PTRPM;
/**
* Converts a TRPMCPU pointer into a VM pointer.
* @returns Pointer to the VM structure the TRPMCPU is part of.
* @param pTrpmCpu Pointer to TRPMCPU instance data.
*/
#define TRPMCPU_2_VM(pTrpmCpu) ( (PVM)((uint8_t *)(pTrpmCpu) - (pTrpmCpu)->offVM) )
/**
* Converts a TRPMCPU pointer into a VMCPU pointer.
* @returns Pointer to the VMCPU structure the TRPMCPU is part of.
* @param pTrpmCpu Pointer to TRPMCPU instance data.
*/
#define TRPMCPU_2_VMCPU(pTrpmCpu) ( (PVMCPU)((uint8_t *)(pTrpmCpu) - (pTrpmCpu)->offVMCpu) )
/**
* Per CPU data for TRPM.
*/
typedef struct TRPMCPU
{
/** Offset into the VM structure.
* See TRPMCPU_2_VM(). */
uint32_t offVM;
/** Offset into the VMCPU structure.
* See TRPMCPU_2_VMCPU(). */
uint32_t offVMCpu;
/** Active Interrupt or trap vector number.
* If not UINT32_MAX this indicates that we're currently processing a
* interrupt, trap, fault, abort, whatever which have arrived at that
* vector number.
*/
uint32_t uActiveVector;
/** Active trap type. */
TRPMEVENT enmActiveType;
/** Errorcode for the active interrupt/trap. */
RTGCUINT uActiveErrorCode; /**< @todo don't use RTGCUINT */
/** CR2 at the time of the active exception. */
RTGCUINTPTR uActiveCR2;
/** Saved trap vector number. */
RTGCUINT uSavedVector; /**< @todo don't use RTGCUINT */
/** Saved errorcode. */
RTGCUINT uSavedErrorCode;
/** Saved cr2. */
RTGCUINTPTR uSavedCR2;
/** Saved trap type. */
TRPMEVENT enmSavedType;
/** Instruction length for software interrupts and software exceptions
* (\#BP, \#OF) */
uint8_t cbInstr;
/** Saved instruction length. */
uint8_t cbSavedInstr;
/** Padding. */
uint8_t au8Padding[2];
/** Previous trap vector # - for debugging. */
RTGCUINT uPrevVector;
} TRPMCPU;
/** Pointer to TRPMCPU Data. */
typedef TRPMCPU *PTRPMCPU;
PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) trpmGuestIDTWriteHandler;
DECLEXPORT(FNPGMRCVIRTPFHANDLER) trpmRCGuestIDTWritePfHandler;
DECLEXPORT(FNPGMRCVIRTPFHANDLER) trpmRCShadowIDTWritePfHandler;
/**
* Clear guest trap/interrupt gate handler
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param iTrap Interrupt/trap number.
*/
VMMDECL(int) trpmClearGuestTrapHandler(PVM pVM, unsigned iTrap);
#ifdef IN_RING3
int trpmR3ClearPassThroughHandler(PVM pVM, unsigned iTrap);
#endif
#ifdef IN_RING0
/**
* Calls the interrupt gate as if we received an interrupt while in Ring-0.
*
* @param uIP The interrupt gate IP.
* @param SelCS The interrupt gate CS.
* @param RSP The interrupt gate RSP. ~0 if no stack switch should take place. (only AMD64)
*/
DECLASM(void) trpmR0DispatchHostInterrupt(RTR0UINTPTR uIP, RTSEL SelCS, RTR0UINTPTR RSP);
/**
* Issues a software interrupt to the specified interrupt vector.
*
* @param uActiveVector The vector number.
*/
DECLASM(void) trpmR0DispatchHostInterruptSimple(RTUINT uActiveVector);
#endif /* IN_RING0 */
/** @} */
RT_C_DECLS_END
#endif /* !VMM_INCLUDED_SRC_include_TRPMInternal_h */
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