/* $Id: SELMInternal.h 76585 2019-01-01 06:31:29Z vboxsync $ */ /** @file * SELM - 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_SELMInternal_h #define VMM_INCLUDED_SRC_include_SELMInternal_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include #include #include #include #include /** @defgroup grp_selm_int Internals * @ingroup grp_selm * @internal * @{ */ /** Enable or disable tracking of Shadow GDT/LDT/TSS. * @{ */ #if defined(VBOX_WITH_RAW_MODE) || defined(DOXYGEN_RUNNING) # define SELM_TRACK_SHADOW_GDT_CHANGES # define SELM_TRACK_SHADOW_LDT_CHANGES # define SELM_TRACK_SHADOW_TSS_CHANGES #endif /** @} */ /** Enable or disable tracking of Guest GDT/LDT/TSS. * @{ */ #if defined(VBOX_WITH_RAW_MODE) || defined(DOXYGEN_RUNNING) # define SELM_TRACK_GUEST_GDT_CHANGES # define SELM_TRACK_GUEST_LDT_CHANGES # define SELM_TRACK_GUEST_TSS_CHANGES #endif /** @} */ /** The number of GDTS allocated for our GDT. (full size) */ #define SELM_GDT_ELEMENTS 8192 /** aHyperSel index to retrieve hypervisor selectors */ /** The Flat CS selector used by the VMM inside the GC. */ #define SELM_HYPER_SEL_CS 0 /** The Flat DS selector used by the VMM inside the GC. */ #define SELM_HYPER_SEL_DS 1 /** The 64-bit mode CS selector used by the VMM inside the GC. */ #define SELM_HYPER_SEL_CS64 2 /** The TSS selector used by the VMM inside the GC. */ #define SELM_HYPER_SEL_TSS 3 /** The TSS selector for taking trap 08 (\#DF). */ #define SELM_HYPER_SEL_TSS_TRAP08 4 /** Number of GDTs we need for internal use */ #define SELM_HYPER_SEL_MAX (SELM_HYPER_SEL_TSS_TRAP08 + 1) /** Default GDT selectors we use for the hypervisor. */ #define SELM_HYPER_DEFAULT_SEL_CS ((SELM_GDT_ELEMENTS - 0x1) << 3) #define SELM_HYPER_DEFAULT_SEL_DS ((SELM_GDT_ELEMENTS - 0x2) << 3) #define SELM_HYPER_DEFAULT_SEL_CS64 ((SELM_GDT_ELEMENTS - 0x3) << 3) #define SELM_HYPER_DEFAULT_SEL_TSS ((SELM_GDT_ELEMENTS - 0x4) << 3) #define SELM_HYPER_DEFAULT_SEL_TSS_TRAP08 ((SELM_GDT_ELEMENTS - 0x5) << 3) /** The lowest value default we use. */ #define SELM_HYPER_DEFAULT_BASE SELM_HYPER_DEFAULT_SEL_TSS_TRAP08 /** * Converts a SELM pointer into a VM pointer. * @returns Pointer to the VM structure the SELM is part of. * @param pSELM Pointer to SELM instance data. */ #define SELM2VM(pSELM) ( (PVM)((char *)pSELM - pSELM->offVM) ) /** * SELM Data (part of VM) */ typedef struct SELM { /** Offset to the VM structure. * See SELM2VM(). */ RTINT offVM; /** Flat CS, DS, 64 bit mode CS, TSS & trap 8 TSS. */ RTSEL aHyperSel[SELM_HYPER_SEL_MAX]; /** @name GDT * @{ */ /** Shadow GDT virtual write access handler type. */ PGMVIRTHANDLERTYPE hShadowGdtWriteHandlerType; /** Guest GDT virtual write access handler type. */ PGMVIRTHANDLERTYPE hGuestGdtWriteHandlerType; /** Pointer to the GCs - R3 Ptr. * This size is governed by SELM_GDT_ELEMENTS. */ R3PTRTYPE(PX86DESC) paGdtR3; /** Pointer to the GCs - RC Ptr. * This is not initialized until the first relocation because it's used to * check if the shadow GDT virtual handler requires deregistration. */ RCPTRTYPE(PX86DESC) paGdtRC; /** Current (last) Guest's GDTR. * The pGdt member is set to RTRCPTR_MAX if we're not monitoring the guest GDT. */ VBOXGDTR GuestGdtr; /** The current (last) effective Guest GDT size. */ uint32_t cbEffGuestGdtLimit; /** Indicates that the Guest GDT access handler have been registered. */ bool fGDTRangeRegistered; /** @} */ bool padding0[3]; /** @name LDT * @{ */ /** Shadow LDT virtual write access handler type. */ PGMVIRTHANDLERTYPE hShadowLdtWriteHandlerType; /** Guest LDT virtual write access handler type. */ PGMVIRTHANDLERTYPE hGuestLdtWriteHandlerType; /** R3 pointer to the LDT shadow area in HMA. */ R3PTRTYPE(void *) pvLdtR3; /** RC pointer to the LDT shadow area in HMA. */ RCPTRTYPE(void *) pvLdtRC; #if GC_ARCH_BITS == 64 RTRCPTR padding1; #endif /** The address of the guest LDT. * RTRCPTR_MAX if not monitored. */ RTGCPTR GCPtrGuestLdt; /** Current LDT limit, both Guest and Shadow. */ uint32_t cbLdtLimit; /** Current LDT offset relative to pvLdtR3/pvLdtRC. */ uint32_t offLdtHyper; #if HC_ARCH_BITS == 32 && GC_ARCH_BITS == 64 uint32_t padding2[2]; #endif /** @} */ /** @name TSS * @{ */ /** TSS. (This is 16 byte aligned!) * @todo I/O bitmap & interrupt redirection table? */ VBOXTSS Tss; /** TSS for trap 08 (\#DF). */ VBOXTSS TssTrap08; /** Shadow TSS virtual write access handler type. */ PGMVIRTHANDLERTYPE hShadowTssWriteHandlerType; /** Guerst TSS virtual write access handler type. */ PGMVIRTHANDLERTYPE hGuestTssWriteHandlerType; /** Monitored shadow TSS address. */ RCPTRTYPE(void *) pvMonShwTssRC; #if GC_ARCH_BITS == 64 RTRCPTR padding3; #endif /** GC Pointer to the current Guest's TSS. * RTRCPTR_MAX if not monitored. */ RTGCPTR GCPtrGuestTss; /** The size of the guest TSS. */ uint32_t cbGuestTss; /** Set if it's a 32-bit TSS. */ bool fGuestTss32Bit; /** Indicates whether the TSS stack selector & base address need to be refreshed. */ bool fSyncTSSRing0Stack; /** The size of the Guest's TSS part we're monitoring. */ uint32_t cbMonitoredGuestTss; /** The guest TSS selector at last sync (part of monitoring). * Contains RTSEL_MAX if not set. */ RTSEL GCSelTss; /** The last known offset of the I/O bitmap. * This is only used if we monitor the bitmap. */ uint16_t offGuestIoBitmap; /** @} */ uint16_t padding4[3]; /** SELMR3UpdateFromCPUM() profiling. */ STAMPROFILE StatUpdateFromCPUM; /** SELMR3SyncTSS() profiling. */ STAMPROFILE StatTSSSync; /** GC: The number of handled writes to the Guest's GDT. */ STAMCOUNTER StatRCWriteGuestGDTHandled; /** GC: The number of unhandled write to the Guest's GDT. */ STAMCOUNTER StatRCWriteGuestGDTUnhandled; /** GC: The number of times writes to Guest's LDT was detected. */ STAMCOUNTER StatRCWriteGuestLDT; /** GC: The number of handled writes to the Guest's TSS. */ STAMCOUNTER StatRCWriteGuestTSSHandled; /** GC: The number of handled writes to the Guest's TSS where we detected a change. */ STAMCOUNTER StatRCWriteGuestTSSHandledChanged; /** GC: The number of handled redir writes to the Guest's TSS where we detected a change. */ STAMCOUNTER StatRCWriteGuestTSSRedir; /** GC: The number of unhandled writes to the Guest's TSS. */ STAMCOUNTER StatRCWriteGuestTSSUnhandled; /** The number of times we had to relocate our hypervisor selectors. */ STAMCOUNTER StatHyperSelsChanged; /** The number of times we had find free hypervisor selectors. */ STAMCOUNTER StatScanForHyperSels; /** Counts the times we detected state selectors in SELMR3UpdateFromCPUM. */ STAMCOUNTER aStatDetectedStaleSReg[X86_SREG_COUNT]; /** Counts the times we were called with already state selectors in * SELMR3UpdateFromCPUM. */ STAMCOUNTER aStatAlreadyStaleSReg[X86_SREG_COUNT]; /** Counts the times we found a stale selector becomming valid again. */ STAMCOUNTER StatStaleToUnstaleSReg; #ifdef VBOX_WITH_STATISTICS /** Times we updated hidden selector registers in CPUMR3UpdateFromCPUM. */ STAMCOUNTER aStatUpdatedSReg[X86_SREG_COUNT]; STAMCOUNTER StatLoadHidSelGst; STAMCOUNTER StatLoadHidSelShw; #endif STAMCOUNTER StatLoadHidSelReadErrors; STAMCOUNTER StatLoadHidSelGstNoGood; } SELM, *PSELM; RT_C_DECLS_BEGIN PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestGDTWriteHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestGDTWritePfHandler; PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestLDTWriteHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestLDTWritePfHandler; PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) selmGuestTSSWriteHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCGuestTSSWritePfHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowGDTWritePfHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowLDTWritePfHandler; DECLEXPORT(FNPGMRCVIRTPFHANDLER) selmRCShadowTSSWritePfHandler; void selmRCSyncGdtSegRegs(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, unsigned iGDTEntry); void selmRCGuestGdtPreWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestGdt, uint32_t cbWrite, PCPUMCTX pCtx); VBOXSTRICTRC selmRCGuestGdtPostWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestTss, uint32_t cbWrite, PCPUMCTX pCtx); VBOXSTRICTRC selmRCGuestTssPostWriteCheck(PVM pVM, PVMCPU pVCpu, uint32_t offGuestTss, uint32_t cbWrite); void selmSetRing1Stack(PVM pVM, uint32_t ss, RTGCPTR32 esp); #ifdef VBOX_WITH_RAW_RING1 void selmSetRing2Stack(PVM pVM, uint32_t ss, RTGCPTR32 esp); #endif RT_C_DECLS_END /** @} */ #endif /* !VMM_INCLUDED_SRC_include_SELMInternal_h */