/* $Id: PGMHandler.cpp 96979 2022-10-04 12:46:05Z vboxsync $ */ /** @file * PGM - Page Manager / Monitor, Access Handlers. */ /* * Copyright (C) 2006-2022 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_PGM #define VBOX_WITHOUT_PAGING_BIT_FIELDS /* 64-bit bitfields are just asking for trouble. See @bugref{9841} and others. */ #include #include #include #include #include #include #include #include #include #include #include #include "PGMInternal.h" #include #include "PGMInline.h" #include #include #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static DECLCALLBACK(int) pgmR3HandlerPhysicalOneClear(PPGMPHYSHANDLER pHandler, void *pvUser); static DECLCALLBACK(int) pgmR3HandlerPhysicalOneSet(PPGMPHYSHANDLER pHandler, void *pvUser); static DECLCALLBACK(int) pgmR3InfoHandlersPhysicalOne(PPGMPHYSHANDLER pHandler, void *pvUser); /** * @callback_method_impl{FNPGMPHYSHANDLER, * Invalid callback entry triggering guru mediation} */ DECLCALLBACK(VBOXSTRICTRC) pgmR3HandlerPhysicalHandlerInvalid(PVMCC pVM, PVMCPUCC pVCpu, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, PGMACCESSORIGIN enmOrigin, uint64_t uUser) { RT_NOREF(pVM, pVCpu, GCPhys, pvPhys, pvBuf, cbBuf, enmAccessType, enmOrigin, uUser); LogRel(("GCPhys=%RGp cbBuf=%#zx enmAccessType=%d uUser=%#RX64\n", GCPhys, cbBuf, enmAccessType, uUser)); return VERR_PGM_HANDLER_IPE_1; } /** * Register a physical page access handler type. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param enmKind The kind of access handler. * @param fFlags PGMPHYSHANDLER_F_XXX * @param pfnHandler Pointer to the ring-3 handler callback. * @param pszDesc The type description. * @param phType Where to return the type handle (cross context safe). */ VMMR3_INT_DECL(int) PGMR3HandlerPhysicalTypeRegister(PVM pVM, PGMPHYSHANDLERKIND enmKind, uint32_t fFlags, PFNPGMPHYSHANDLER pfnHandler, const char *pszDesc, PPGMPHYSHANDLERTYPE phType) { /* * Validate input. */ AssertPtrReturn(phType, VERR_INVALID_POINTER); *phType = NIL_PGMPHYSHANDLERTYPE; AssertPtrReturn(pfnHandler, VERR_INVALID_POINTER); AssertPtrReturn(pszDesc, VERR_INVALID_POINTER); AssertReturn( enmKind == PGMPHYSHANDLERKIND_WRITE || enmKind == PGMPHYSHANDLERKIND_ALL || enmKind == PGMPHYSHANDLERKIND_MMIO, VERR_INVALID_PARAMETER); AssertMsgReturn(!(fFlags & ~PGMPHYSHANDLER_F_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_FLAGS); VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); /* * Do the allocating. */ uint32_t const idxType = pVM->pgm.s.cPhysHandlerTypes; AssertLogRelReturn(idxType < RT_ELEMENTS(pVM->pgm.s.aPhysHandlerTypes), VERR_OUT_OF_RESOURCES); PPGMPHYSHANDLERTYPEINTR3 const pType = &pVM->pgm.s.aPhysHandlerTypes[idxType]; AssertReturn(pType->enmKind == PGMPHYSHANDLERKIND_INVALID, VERR_PGM_HANDLER_IPE_1); pVM->pgm.s.cPhysHandlerTypes = idxType + 1; pType->enmKind = enmKind; pType->uState = enmKind == PGMPHYSHANDLERKIND_WRITE ? PGM_PAGE_HNDL_PHYS_STATE_WRITE : PGM_PAGE_HNDL_PHYS_STATE_ALL; pType->fKeepPgmLock = RT_BOOL(fFlags & PGMPHYSHANDLER_F_KEEP_PGM_LOCK); pType->fRing0DevInsIdx = RT_BOOL(fFlags & PGMPHYSHANDLER_F_R0_DEVINS_IDX); pType->fNotInHm = RT_BOOL(fFlags & PGMPHYSHANDLER_F_NOT_IN_HM); pType->pfnHandler = pfnHandler; pType->pszDesc = pszDesc; *phType = pType->hType; LogFlow(("PGMR3HandlerPhysicalTypeRegisterEx: hType=%#RX64/%#x: enmKind=%d fFlags=%#x pfnHandler=%p pszDesc=%s\n", pType->hType, idxType, enmKind, fFlags, pfnHandler, pszDesc)); return VINF_SUCCESS; } /** * Updates the physical page access handlers. * * @param pVM The cross context VM structure. * @remark Only used when restoring a saved state. */ void pgmR3HandlerPhysicalUpdateAll(PVM pVM) { LogFlow(("pgmHandlerPhysicalUpdateAll:\n")); /* * Clear and set. * (the right -> left on the setting pass is just bird speculating on cache hits) */ PGM_LOCK_VOID(pVM); int rc = pVM->pgm.s.pPhysHandlerTree->doWithAllFromLeft(&pVM->pgm.s.PhysHandlerAllocator, pgmR3HandlerPhysicalOneClear, pVM); AssertRC(rc); rc = pVM->pgm.s.pPhysHandlerTree->doWithAllFromRight(&pVM->pgm.s.PhysHandlerAllocator, pgmR3HandlerPhysicalOneSet, pVM); AssertRC(rc); PGM_UNLOCK(pVM); } /** * Clears all the page level flags for one physical handler range. * * @returns 0 * @param pHandler The physical access handler entry. * @param pvUser Pointer to the VM. */ static DECLCALLBACK(int) pgmR3HandlerPhysicalOneClear(PPGMPHYSHANDLER pHandler, void *pvUser) { PPGMRAMRANGE pRamHint = NULL; RTGCPHYS GCPhys = pHandler->Key; RTUINT cPages = pHandler->cPages; PVM pVM = (PVM)pvUser; for (;;) { PPGMPAGE pPage; int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, &pRamHint); if (RT_SUCCESS(rc)) { PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_NONE, false); #ifdef VBOX_WITH_NATIVE_NEM /* Tell NEM about the protection change. */ if (VM_IS_NEM_ENABLED(pVM)) { uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage); PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage); NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage), PGM_RAMRANGE_CALC_PAGE_R3PTR(pRamHint, GCPhys), pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State); PGM_PAGE_SET_NEM_STATE(pPage, u2State); } #endif } else AssertRC(rc); if (--cPages == 0) return 0; GCPhys += GUEST_PAGE_SIZE; } } /** * Sets all the page level flags for one physical handler range. * * @returns 0 * @param pHandler The physical access handler entry. * @param pvUser Pointer to the VM. */ static DECLCALLBACK(int) pgmR3HandlerPhysicalOneSet(PPGMPHYSHANDLER pHandler, void *pvUser) { PVM pVM = (PVM)pvUser; PCPGMPHYSHANDLERTYPEINT pType = PGMPHYSHANDLER_GET_TYPE_NO_NULL(pVM, pHandler); unsigned uState = pType->uState; PPGMRAMRANGE pRamHint = NULL; RTGCPHYS GCPhys = pHandler->Key; RTUINT cPages = pHandler->cPages; for (;;) { PPGMPAGE pPage; int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, &pRamHint); if (RT_SUCCESS(rc)) { PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, uState, pType->fNotInHm); #ifdef VBOX_WITH_NATIVE_NEM /* Tell NEM about the protection change. */ if (VM_IS_NEM_ENABLED(pVM)) { uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage); PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage); NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage), PGM_RAMRANGE_CALC_PAGE_R3PTR(pRamHint, GCPhys), pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State); PGM_PAGE_SET_NEM_STATE(pPage, u2State); } #endif } else AssertRC(rc); if (--cPages == 0) return 0; GCPhys += GUEST_PAGE_SIZE; } } /** * Arguments for pgmR3InfoHandlersPhysicalOne and pgmR3InfoHandlersVirtualOne. */ typedef struct PGMHANDLERINFOARG { /** The output helpers.*/ PCDBGFINFOHLP pHlp; /** Pointer to the cross context VM handle. */ PVM pVM; /** Set if statistics should be dumped. */ bool fStats; } PGMHANDLERINFOARG, *PPGMHANDLERINFOARG; /** * Info callback for 'pgmhandlers'. * * @param pVM The cross context VM structure. * @param pHlp The output helpers. * @param pszArgs The arguments. phys or virt. */ DECLCALLBACK(void) pgmR3InfoHandlers(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs) { /* * Parse options. */ PGMHANDLERINFOARG Args = { pHlp, pVM, /* .fStats = */ true }; if (pszArgs) Args.fStats = strstr(pszArgs, "nost") == NULL; /* * Dump the handlers. */ pHlp->pfnPrintf(pHlp, "Physical handlers: max %#x, %u allocator error%s, %u tree error%s\n" "%*s %*s %*s uUser Type Description\n", pVM->pgm.s.PhysHandlerAllocator.m_cNodes, pVM->pgm.s.PhysHandlerAllocator.m_cErrors, pVM->pgm.s.PhysHandlerAllocator.m_cErrors != 0 ? "s" : "", pVM->pgm.s.pPhysHandlerTree->m_cErrors, pVM->pgm.s.pPhysHandlerTree->m_cErrors != 0 ? "s" : "", - (int)sizeof(RTGCPHYS) * 2, "From", - (int)sizeof(RTGCPHYS) * 2 - 3, "- To (incl)", - (int)sizeof(RTHCPTR) * 2 - 1, "Handler (R3)"); pVM->pgm.s.pPhysHandlerTree->doWithAllFromLeft(&pVM->pgm.s.PhysHandlerAllocator, pgmR3InfoHandlersPhysicalOne, &Args); } /** * Displays one physical handler range. * * @returns 0 * @param pHandler The physical access handler entry. * @param pvUser Pointer to command helper functions. */ static DECLCALLBACK(int) pgmR3InfoHandlersPhysicalOne(PPGMPHYSHANDLER pHandler, void *pvUser) { PPGMHANDLERINFOARG pArgs = (PPGMHANDLERINFOARG)pvUser; PCDBGFINFOHLP pHlp = pArgs->pHlp; PCPGMPHYSHANDLERTYPEINT pType = PGMPHYSHANDLER_GET_TYPE_NO_NULL(pArgs->pVM, pHandler); const char *pszType; switch (pType->enmKind) { case PGMPHYSHANDLERKIND_MMIO: pszType = "MMIO "; break; case PGMPHYSHANDLERKIND_WRITE: pszType = "Write "; break; case PGMPHYSHANDLERKIND_ALL: pszType = "All "; break; default: pszType = "???????"; break; } char szFlags[80]; size_t cchFlags = 0; if (pType->fKeepPgmLock) cchFlags = RTStrPrintf(szFlags, sizeof(szFlags), "(keep-pgm-lock"); if (pType->fRing0DevInsIdx) cchFlags += RTStrPrintf(&szFlags[cchFlags], sizeof(szFlags) - cchFlags, cchFlags ? ", keep-pgm-lock" : "(keep-pgm-lock"); if (pType->fRing0Enabled) cchFlags += RTStrPrintf(&szFlags[cchFlags], sizeof(szFlags) - cchFlags, cchFlags ? ", r0-enabled)" : "(r0-enabled)"); else cchFlags += RTStrPrintf(&szFlags[cchFlags], sizeof(szFlags) - cchFlags, cchFlags ? ", r3-only)" : "(r3-only)"); pHlp->pfnPrintf(pHlp, "%RGp - %RGp %p %016RX64 %s %s %s\n", pHandler->Key, pHandler->KeyLast, pType->pfnHandler, pHandler->uUser, pszType, pHandler->pszDesc, szFlags); #ifdef VBOX_WITH_STATISTICS if (pArgs->fStats) pHlp->pfnPrintf(pHlp, " cPeriods: %9RU64 cTicks: %11RU64 Min: %11RU64 Avg: %11RU64 Max: %11RU64\n", pHandler->Stat.cPeriods, pHandler->Stat.cTicks, pHandler->Stat.cTicksMin, pHandler->Stat.cPeriods ? pHandler->Stat.cTicks / pHandler->Stat.cPeriods : 0, pHandler->Stat.cTicksMax); #endif return 0; }