| 1 | /* $Id: REMAll.cpp 35346 2010-12-27 16:13:13Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * REM - Recompiled Execution Monitor, all Contexts part.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*******************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *******************************************************************************/
|
|---|
| 22 | #define LOG_GROUP LOG_GROUP_REM
|
|---|
| 23 | #include <VBox/vmm/rem.h>
|
|---|
| 24 | #include <VBox/vmm/em.h>
|
|---|
| 25 | #include <VBox/vmm/vmm.h>
|
|---|
| 26 | #include "REMInternal.h"
|
|---|
| 27 | #include <VBox/vmm/vm.h>
|
|---|
| 28 | #include <VBox/err.h>
|
|---|
| 29 | #include <VBox/log.h>
|
|---|
| 30 |
|
|---|
| 31 | #include <iprt/asm.h>
|
|---|
| 32 | #include <iprt/assert.h>
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | #ifndef IN_RING3
|
|---|
| 36 |
|
|---|
| 37 | /**
|
|---|
| 38 | * Records a invlpg instruction for replaying upon REM entry.
|
|---|
| 39 | *
|
|---|
| 40 | * @param pVM The VM handle.
|
|---|
| 41 | * @param GCPtrPage The
|
|---|
| 42 | */
|
|---|
| 43 | VMMDECL(void) REMNotifyInvalidatePage(PVM pVM, RTGCPTR GCPtrPage)
|
|---|
| 44 | {
|
|---|
| 45 | /*
|
|---|
| 46 | * Try take the REM lock and push the address onto the array.
|
|---|
| 47 | */
|
|---|
| 48 | if ( pVM->rem.s.cInvalidatedPages < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages)
|
|---|
| 49 | && EMTryEnterRemLock(pVM) == VINF_SUCCESS)
|
|---|
| 50 | {
|
|---|
| 51 | uint32_t iPage = pVM->rem.s.cInvalidatedPages;
|
|---|
| 52 | if (iPage < RT_ELEMENTS(pVM->rem.s.aGCPtrInvalidatedPages))
|
|---|
| 53 | {
|
|---|
| 54 | ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, iPage + 1);
|
|---|
| 55 | pVM->rem.s.aGCPtrInvalidatedPages[iPage] = GCPtrPage;
|
|---|
| 56 |
|
|---|
| 57 | EMRemUnlock(pVM);
|
|---|
| 58 | return;
|
|---|
| 59 | }
|
|---|
| 60 |
|
|---|
| 61 | CPUMSetChangedFlags(VMMGetCpu(pVM), CPUM_CHANGED_GLOBAL_TLB_FLUSH); /** @todo this array should be per-cpu technically speaking. */
|
|---|
| 62 | ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, 0); /** @todo leave this alone? Optimize this code? */
|
|---|
| 63 |
|
|---|
| 64 | EMRemUnlock(pVM);
|
|---|
| 65 | }
|
|---|
| 66 | else
|
|---|
| 67 | {
|
|---|
| 68 | /* Fallback: Simply tell the recompiler to flush its TLB. */
|
|---|
| 69 | CPUMSetChangedFlags(VMMGetCpu(pVM), CPUM_CHANGED_GLOBAL_TLB_FLUSH);
|
|---|
| 70 | ASMAtomicWriteU32(&pVM->rem.s.cInvalidatedPages, 0); /** @todo leave this alone?! Optimize this code? */
|
|---|
| 71 | }
|
|---|
| 72 |
|
|---|
| 73 | return;
|
|---|
| 74 | }
|
|---|
| 75 |
|
|---|
| 76 |
|
|---|
| 77 | /**
|
|---|
| 78 | * Insert pending notification
|
|---|
| 79 | *
|
|---|
| 80 | * @param pVM VM Handle.
|
|---|
| 81 | * @param pRec Notification record to insert
|
|---|
| 82 | */
|
|---|
| 83 | static void remNotifyHandlerInsert(PVM pVM, PREMHANDLERNOTIFICATION pRec)
|
|---|
| 84 | {
|
|---|
| 85 | /*
|
|---|
| 86 | * Fetch a free record.
|
|---|
| 87 | */
|
|---|
| 88 | uint32_t cFlushes = 0;
|
|---|
| 89 | uint32_t idxFree;
|
|---|
| 90 | PREMHANDLERNOTIFICATION pFree;
|
|---|
| 91 | do
|
|---|
| 92 | {
|
|---|
| 93 | idxFree = ASMAtomicUoReadU32(&pVM->rem.s.idxFreeList);
|
|---|
| 94 | if (idxFree == UINT32_MAX)
|
|---|
| 95 | {
|
|---|
| 96 | do
|
|---|
| 97 | {
|
|---|
| 98 | cFlushes++;
|
|---|
| 99 | Assert(cFlushes != 128);
|
|---|
| 100 | AssertFatal(cFlushes < _1M);
|
|---|
| 101 | VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_REM_REPLAY_HANDLER_NOTIFICATIONS, 0);
|
|---|
| 102 | idxFree = ASMAtomicUoReadU32(&pVM->rem.s.idxFreeList);
|
|---|
| 103 | } while (idxFree == UINT32_MAX);
|
|---|
| 104 | }
|
|---|
| 105 | pFree = &pVM->rem.s.aHandlerNotifications[idxFree];
|
|---|
| 106 | } while (!ASMAtomicCmpXchgU32(&pVM->rem.s.idxFreeList, pFree->idxNext, idxFree));
|
|---|
| 107 |
|
|---|
| 108 | /*
|
|---|
| 109 | * Copy the record.
|
|---|
| 110 | */
|
|---|
| 111 | pFree->enmKind = pRec->enmKind;
|
|---|
| 112 | pFree->u = pRec->u;
|
|---|
| 113 |
|
|---|
| 114 | /*
|
|---|
| 115 | * Insert it into the pending list.
|
|---|
| 116 | */
|
|---|
| 117 | uint32_t idxNext;
|
|---|
| 118 | do
|
|---|
| 119 | {
|
|---|
| 120 | idxNext = ASMAtomicUoReadU32(&pVM->rem.s.idxPendingList);
|
|---|
| 121 | ASMAtomicWriteU32(&pFree->idxNext, idxNext);
|
|---|
| 122 | ASMCompilerBarrier();
|
|---|
| 123 | } while (!ASMAtomicCmpXchgU32(&pVM->rem.s.idxPendingList, idxFree, idxNext));
|
|---|
| 124 |
|
|---|
| 125 | VM_FF_SET(pVM, VM_FF_REM_HANDLER_NOTIFY);
|
|---|
| 126 | }
|
|---|
| 127 |
|
|---|
| 128 |
|
|---|
| 129 | /**
|
|---|
| 130 | * Notification about a successful PGMR3HandlerPhysicalRegister() call.
|
|---|
| 131 | *
|
|---|
| 132 | * @param pVM VM Handle.
|
|---|
| 133 | * @param enmType Handler type.
|
|---|
| 134 | * @param GCPhys Handler range address.
|
|---|
| 135 | * @param cb Size of the handler range.
|
|---|
| 136 | * @param fHasHCHandler Set if the handler have a HC callback function.
|
|---|
| 137 | */
|
|---|
| 138 | VMMDECL(void) REMNotifyHandlerPhysicalRegister(PVM pVM, PGMPHYSHANDLERTYPE enmType, RTGCPHYS GCPhys, RTGCPHYS cb, bool fHasHCHandler)
|
|---|
| 139 | {
|
|---|
| 140 | REMHANDLERNOTIFICATION Rec;
|
|---|
| 141 | Rec.enmKind = REMHANDLERNOTIFICATIONKIND_PHYSICAL_REGISTER;
|
|---|
| 142 | Rec.u.PhysicalRegister.enmType = enmType;
|
|---|
| 143 | Rec.u.PhysicalRegister.GCPhys = GCPhys;
|
|---|
| 144 | Rec.u.PhysicalRegister.cb = cb;
|
|---|
| 145 | Rec.u.PhysicalRegister.fHasHCHandler = fHasHCHandler;
|
|---|
| 146 | remNotifyHandlerInsert(pVM, &Rec);
|
|---|
| 147 | }
|
|---|
| 148 |
|
|---|
| 149 |
|
|---|
| 150 | /**
|
|---|
| 151 | * Notification about a successful PGMR3HandlerPhysicalDeregister() operation.
|
|---|
| 152 | *
|
|---|
| 153 | * @param pVM VM Handle.
|
|---|
| 154 | * @param enmType Handler type.
|
|---|
| 155 | * @param GCPhys Handler range address.
|
|---|
| 156 | * @param cb Size of the handler range.
|
|---|
| 157 | * @param fHasHCHandler Set if the handler have a HC callback function.
|
|---|
| 158 | * @param fRestoreAsRAM Whether the to restore it as normal RAM or as unassigned memory.
|
|---|
| 159 | */
|
|---|
| 160 | VMMDECL(void) REMNotifyHandlerPhysicalDeregister(PVM pVM, PGMPHYSHANDLERTYPE enmType, RTGCPHYS GCPhys, RTGCPHYS cb, bool fHasHCHandler, bool fRestoreAsRAM)
|
|---|
| 161 | {
|
|---|
| 162 | REMHANDLERNOTIFICATION Rec;
|
|---|
| 163 | Rec.enmKind = REMHANDLERNOTIFICATIONKIND_PHYSICAL_DEREGISTER;
|
|---|
| 164 | Rec.u.PhysicalDeregister.enmType = enmType;
|
|---|
| 165 | Rec.u.PhysicalDeregister.GCPhys = GCPhys;
|
|---|
| 166 | Rec.u.PhysicalDeregister.cb = cb;
|
|---|
| 167 | Rec.u.PhysicalDeregister.fHasHCHandler = fHasHCHandler;
|
|---|
| 168 | Rec.u.PhysicalDeregister.fRestoreAsRAM = fRestoreAsRAM;
|
|---|
| 169 | remNotifyHandlerInsert(pVM, &Rec);
|
|---|
| 170 | }
|
|---|
| 171 |
|
|---|
| 172 |
|
|---|
| 173 | /**
|
|---|
| 174 | * Notification about a successful PGMR3HandlerPhysicalModify() call.
|
|---|
| 175 | *
|
|---|
| 176 | * @param pVM VM Handle.
|
|---|
| 177 | * @param enmType Handler type.
|
|---|
| 178 | * @param GCPhysOld Old handler range address.
|
|---|
| 179 | * @param GCPhysNew New handler range address.
|
|---|
| 180 | * @param cb Size of the handler range.
|
|---|
| 181 | * @param fHasHCHandler Set if the handler have a HC callback function.
|
|---|
| 182 | * @param fRestoreAsRAM Whether the to restore it as normal RAM or as unassigned memory.
|
|---|
| 183 | */
|
|---|
| 184 | VMMDECL(void) REMNotifyHandlerPhysicalModify(PVM pVM, PGMPHYSHANDLERTYPE enmType, RTGCPHYS GCPhysOld, RTGCPHYS GCPhysNew, RTGCPHYS cb, bool fHasHCHandler, bool fRestoreAsRAM)
|
|---|
| 185 | {
|
|---|
| 186 | REMHANDLERNOTIFICATION Rec;
|
|---|
| 187 | Rec.enmKind = REMHANDLERNOTIFICATIONKIND_PHYSICAL_MODIFY;
|
|---|
| 188 | Rec.u.PhysicalModify.enmType = enmType;
|
|---|
| 189 | Rec.u.PhysicalModify.GCPhysOld = GCPhysOld;
|
|---|
| 190 | Rec.u.PhysicalModify.GCPhysNew = GCPhysNew;
|
|---|
| 191 | Rec.u.PhysicalModify.cb = cb;
|
|---|
| 192 | Rec.u.PhysicalModify.fHasHCHandler = fHasHCHandler;
|
|---|
| 193 | Rec.u.PhysicalModify.fRestoreAsRAM = fRestoreAsRAM;
|
|---|
| 194 | remNotifyHandlerInsert(pVM, &Rec);
|
|---|
| 195 | }
|
|---|
| 196 |
|
|---|
| 197 | #endif /* !IN_RING3 */
|
|---|
| 198 |
|
|---|
| 199 | #ifdef IN_RC
|
|---|
| 200 | /**
|
|---|
| 201 | * Flushes the physical handler notifications if the queue is almost full.
|
|---|
| 202 | *
|
|---|
| 203 | * This is for avoiding trouble in RC when changing CR3.
|
|---|
| 204 | *
|
|---|
| 205 | * @param pVM The VM handle.
|
|---|
| 206 | * @param pVCpu The virtual CPU handle of the calling EMT.
|
|---|
| 207 | */
|
|---|
| 208 | VMMDECL(void) REMNotifyHandlerPhysicalFlushIfAlmostFull(PVM pVM, PVMCPU pVCpu)
|
|---|
| 209 | {
|
|---|
| 210 | Assert(pVM->cCpus == 1);
|
|---|
| 211 |
|
|---|
| 212 | /*
|
|---|
| 213 | * Less than 48 items means we should flush.
|
|---|
| 214 | */
|
|---|
| 215 | uint32_t cFree = 0;
|
|---|
| 216 | for (uint32_t idx = pVM->rem.s.idxFreeList;
|
|---|
| 217 | idx != UINT32_MAX;
|
|---|
| 218 | idx = pVM->rem.s.aHandlerNotifications[idx].idxNext)
|
|---|
| 219 | {
|
|---|
| 220 | Assert(idx < RT_ELEMENTS(pVM->rem.s.aHandlerNotifications));
|
|---|
| 221 | if (++cFree >= 48)
|
|---|
| 222 | return;
|
|---|
| 223 | }
|
|---|
| 224 | AssertRelease(VM_FF_ISSET(pVM, VM_FF_REM_HANDLER_NOTIFY));
|
|---|
| 225 | AssertRelease(pVM->rem.s.idxPendingList != UINT32_MAX);
|
|---|
| 226 |
|
|---|
| 227 | /* Ok, we gotta flush them. */
|
|---|
| 228 | VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_REM_REPLAY_HANDLER_NOTIFICATIONS, 0);
|
|---|
| 229 |
|
|---|
| 230 | AssertRelease(pVM->rem.s.idxPendingList == UINT32_MAX);
|
|---|
| 231 | AssertRelease(pVM->rem.s.idxFreeList != UINT32_MAX);
|
|---|
| 232 | }
|
|---|
| 233 | #endif /* IN_RC */
|
|---|
| 234 |
|
|---|
| 235 |
|
|---|
| 236 | /**
|
|---|
| 237 | * Make REM flush all translation block upon the next call to REMR3State().
|
|---|
| 238 | *
|
|---|
| 239 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 240 | */
|
|---|
| 241 | VMMDECL(void) REMFlushTBs(PVM pVM)
|
|---|
| 242 | {
|
|---|
| 243 | LogFlow(("REMFlushTBs: fFlushTBs=%RTbool fInREM=%RTbool fInStateSync=%RTbool\n",
|
|---|
| 244 | pVM->rem.s.fFlushTBs, pVM->rem.s.fInREM, pVM->rem.s.fInStateSync));
|
|---|
| 245 | pVM->rem.s.fFlushTBs = true;
|
|---|
| 246 | }
|
|---|
| 247 |
|
|---|
