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/* $Id: PGMHandler.cpp $ */
/** @file
* PGM - Page Manager / Monitor, Access Handlers.
*/
/*
* Copyright (C) 2006-2023 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 <https://www.gnu.org/licenses>.
*
* 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 <VBox/vmm/dbgf.h>
#include <VBox/vmm/pgm.h>
#include <VBox/vmm/cpum.h>
#include <VBox/vmm/iom.h>
#include <VBox/sup.h>
#include <VBox/vmm/mm.h>
#include <VBox/vmm/em.h>
#include <VBox/vmm/stam.h>
#include <VBox/vmm/dbgf.h>
#include <VBox/vmm/selm.h>
#include <VBox/vmm/ssm.h>
#include "PGMInternal.h"
#include <VBox/vmm/vmcc.h>
#include "PGMInline.h"
#include <VBox/dbg.h>
#include <VBox/log.h>
#include <iprt/assert.h>
#include <iprt/alloc.h>
#include <iprt/asm.h>
#include <iprt/errcore.h>
#include <iprt/thread.h>
#include <iprt/string.h>
#include <VBox/param.h>
#include <VBox/vmm/hm.h>
/*********************************************************************************************************************************
* 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;
}
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