| 1 | /* $Id: PGMAllPool.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * PGM Shadow Page Pool.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #define LOG_GROUP LOG_GROUP_PGM_POOL
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| 33 | #define VBOX_WITHOUT_PAGING_BIT_FIELDS /* 64-bit bitfields are just asking for trouble. See @bugref{9841} and others. */
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| 34 | #include <VBox/vmm/pgm.h>
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| 35 | #include <VBox/vmm/mm.h>
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| 36 | #include <VBox/vmm/em.h>
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| 37 | #include <VBox/vmm/cpum.h>
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| 38 | #include "PGMInternal.h"
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| 39 | #include <VBox/vmm/vmcc.h>
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| 40 | #include "PGMInline.h"
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| 41 | #include <VBox/disopcode.h>
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| 42 | #include <VBox/vmm/hm_vmx.h>
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| 43 |
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| 44 | #include <VBox/log.h>
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| 45 | #include <VBox/err.h>
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| 46 | #include <iprt/asm.h>
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| 47 | #include <iprt/string.h>
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| 48 |
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| 49 |
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| 50 | /*********************************************************************************************************************************
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| 51 | * Internal Functions *
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| 52 | *********************************************************************************************************************************/
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| 53 | RT_C_DECLS_BEGIN
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| 54 | #if 0 /* unused */
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| 55 | DECLINLINE(unsigned) pgmPoolTrackGetShadowEntrySize(PGMPOOLKIND enmKind);
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| 56 | DECLINLINE(unsigned) pgmPoolTrackGetGuestEntrySize(PGMPOOLKIND enmKind);
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| 57 | #endif /* unused */
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| 58 | static void pgmPoolTrackClearPageUsers(PPGMPOOL pPool, PPGMPOOLPAGE pPage);
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| 59 | static void pgmPoolTrackDeref(PPGMPOOL pPool, PPGMPOOLPAGE pPage);
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| 60 | static int pgmPoolTrackAddUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable);
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| 61 | static void pgmPoolMonitorModifiedRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage);
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| 62 | #if defined(LOG_ENABLED) || defined(VBOX_STRICT)
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| 63 | static const char *pgmPoolPoolKindToStr(uint8_t enmKind);
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| 64 | #endif
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| 65 | #if 0 /*defined(VBOX_STRICT) && defined(PGMPOOL_WITH_OPTIMIZED_DIRTY_PT)*/
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| 66 | static void pgmPoolTrackCheckPTPaePae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PTPAE pGstPT);
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| 67 | #endif
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| 68 |
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| 69 | int pgmPoolTrackFlushGCPhysPTsSlow(PVMCC pVM, PPGMPAGE pPhysPage);
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| 70 | PPGMPOOLPHYSEXT pgmPoolTrackPhysExtAlloc(PVMCC pVM, uint16_t *piPhysExt);
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| 71 | void pgmPoolTrackPhysExtFree(PVMCC pVM, uint16_t iPhysExt);
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| 72 | void pgmPoolTrackPhysExtFreeList(PVMCC pVM, uint16_t iPhysExt);
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| 73 |
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| 74 | RT_C_DECLS_END
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| 75 |
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| 76 |
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| 77 | #if 0 /* unused */
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| 78 | /**
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| 79 | * Checks if the specified page pool kind is for a 4MB or 2MB guest page.
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| 80 | *
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| 81 | * @returns true if it's the shadow of a 4MB or 2MB guest page, otherwise false.
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| 82 | * @param enmKind The page kind.
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| 83 | */
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| 84 | DECLINLINE(bool) pgmPoolIsBigPage(PGMPOOLKIND enmKind)
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| 85 | {
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| 86 | switch (enmKind)
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| 87 | {
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| 88 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
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| 89 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
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| 90 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
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| 91 | return true;
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| 92 | default:
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| 93 | return false;
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| 94 | }
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| 95 | }
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| 96 | #endif /* unused */
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| 97 |
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| 98 |
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| 99 | /**
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| 100 | * Flushes a chain of pages sharing the same access monitor.
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| 101 | *
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| 102 | * @param pPool The pool.
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| 103 | * @param pPage A page in the chain.
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| 104 | */
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| 105 | void pgmPoolMonitorChainFlush(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
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| 106 | {
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| 107 | LogFlow(("pgmPoolMonitorChainFlush: Flush page %RGp type=%d\n", pPage->GCPhys, pPage->enmKind));
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| 108 |
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| 109 | /*
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| 110 | * Find the list head.
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| 111 | */
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| 112 | uint16_t idx = pPage->idx;
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| 113 | if (pPage->iMonitoredPrev != NIL_PGMPOOL_IDX)
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| 114 | {
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| 115 | while (pPage->iMonitoredPrev != NIL_PGMPOOL_IDX)
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| 116 | {
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| 117 | idx = pPage->iMonitoredPrev;
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| 118 | Assert(idx != pPage->idx);
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| 119 | pPage = &pPool->aPages[idx];
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| 120 | }
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| 121 | }
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| 122 |
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| 123 | /*
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| 124 | * Iterate the list flushing each shadow page.
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| 125 | */
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| 126 | for (;;)
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| 127 | {
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| 128 | idx = pPage->iMonitoredNext;
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| 129 | Assert(idx != pPage->idx);
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| 130 | if (pPage->idx >= PGMPOOL_IDX_FIRST)
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| 131 | {
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| 132 | int rc2 = pgmPoolFlushPage(pPool, pPage);
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| 133 | AssertRC(rc2);
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| 134 | }
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| 135 | /* next */
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| 136 | if (idx == NIL_PGMPOOL_IDX)
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| 137 | break;
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| 138 | pPage = &pPool->aPages[idx];
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| 139 | }
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| 140 | }
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| 141 |
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| 142 |
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| 143 | /**
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| 144 | * Wrapper for getting the current context pointer to the entry being modified.
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| 145 | *
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| 146 | * @returns VBox status code suitable for scheduling.
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| 147 | * @param pVM The cross context VM structure.
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| 148 | * @param pvDst Destination address
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| 149 | * @param pvSrc Pointer to the mapping of @a GCPhysSrc or NULL depending
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| 150 | * on the context (e.g. \#PF in R0 & RC).
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| 151 | * @param GCPhysSrc The source guest physical address.
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| 152 | * @param cb Size of data to read
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| 153 | */
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| 154 | DECLINLINE(int) pgmPoolPhysSimpleReadGCPhys(PVMCC pVM, void *pvDst, void const *pvSrc, RTGCPHYS GCPhysSrc, size_t cb)
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| 155 | {
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| 156 | #if defined(IN_RING3)
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| 157 | NOREF(pVM); NOREF(GCPhysSrc);
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| 158 | memcpy(pvDst, (RTHCPTR)((uintptr_t)pvSrc & ~(RTHCUINTPTR)(cb - 1)), cb);
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| 159 | return VINF_SUCCESS;
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| 160 | #else
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| 161 | /** @todo in RC we could attempt to use the virtual address, although this can cause many faults (PAE Windows XP guest). */
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| 162 | NOREF(pvSrc);
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| 163 | return PGMPhysSimpleReadGCPhys(pVM, pvDst, GCPhysSrc & ~(RTGCPHYS)(cb - 1), cb);
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| 164 | #endif
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| 165 | }
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| 166 |
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| 167 |
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| 168 | /**
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| 169 | * Process shadow entries before they are changed by the guest.
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| 170 | *
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| 171 | * For PT entries we will clear them. For PD entries, we'll simply check
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| 172 | * for mapping conflicts and set the SyncCR3 FF if found.
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| 173 | *
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| 174 | * @param pVCpu The cross context virtual CPU structure.
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| 175 | * @param pPool The pool.
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| 176 | * @param pPage The head page.
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| 177 | * @param GCPhysFault The guest physical fault address.
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| 178 | * @param pvAddress Pointer to the mapping of @a GCPhysFault or NULL
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| 179 | * depending on the context (e.g. \#PF in R0 & RC).
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| 180 | * @param cbWrite Write size; might be zero if the caller knows we're not crossing entry boundaries
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| 181 | */
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| 182 | static void pgmPoolMonitorChainChanging(PVMCPU pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTGCPHYS GCPhysFault,
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| 183 | void const *pvAddress, unsigned cbWrite)
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| 184 | {
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| 185 | AssertMsg(pPage->iMonitoredPrev == NIL_PGMPOOL_IDX, ("%u (idx=%u)\n", pPage->iMonitoredPrev, pPage->idx));
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| 186 | const unsigned off = GCPhysFault & GUEST_PAGE_OFFSET_MASK;
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| 187 | PVMCC pVM = pPool->CTX_SUFF(pVM);
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| 188 | NOREF(pVCpu);
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| 189 |
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| 190 | LogFlow(("pgmPoolMonitorChainChanging: %RGv phys=%RGp cbWrite=%d\n",
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| 191 | (RTGCPTR)(CTXTYPE(RTGCPTR, uintptr_t, RTGCPTR))(uintptr_t)pvAddress, GCPhysFault, cbWrite));
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| 192 |
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| 193 | for (;;)
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| 194 | {
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| 195 | union
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| 196 | {
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| 197 | void *pv;
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| 198 | PX86PT pPT;
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| 199 | PPGMSHWPTPAE pPTPae;
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| 200 | PX86PD pPD;
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| 201 | PX86PDPAE pPDPae;
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| 202 | PX86PDPT pPDPT;
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| 203 | PX86PML4 pPML4;
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| 204 | } uShw;
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| 205 |
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| 206 | LogFlow(("pgmPoolMonitorChainChanging: page idx=%d phys=%RGp (next=%d) kind=%s write=%#x\n",
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| 207 | pPage->idx, pPage->GCPhys, pPage->iMonitoredNext, pgmPoolPoolKindToStr(pPage->enmKind), cbWrite));
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| 208 |
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| 209 | uShw.pv = NULL;
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| 210 | switch (pPage->enmKind)
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| 211 | {
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| 212 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
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| 213 | {
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| 214 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPT));
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| 215 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
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| 216 | const unsigned iShw = off / sizeof(X86PTE);
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| 217 | LogFlow(("PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT iShw=%x\n", iShw));
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| 218 | X86PGUINT const uPde = uShw.pPT->a[iShw].u;
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| 219 | if (uPde & X86_PTE_P)
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| 220 | {
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| 221 | X86PTE GstPte;
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| 222 | int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
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| 223 | AssertRC(rc);
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| 224 | Log4(("pgmPoolMonitorChainChanging 32_32: deref %016RX64 GCPhys %08RX32\n", uPde & X86_PTE_PG_MASK, GstPte.u & X86_PTE_PG_MASK));
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| 225 | pgmPoolTracDerefGCPhysHint(pPool, pPage, uPde & X86_PTE_PG_MASK, GstPte.u & X86_PTE_PG_MASK, iShw);
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| 226 | ASMAtomicWriteU32(&uShw.pPT->a[iShw].u, 0);
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| 227 | }
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| 228 | break;
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| 229 | }
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| 230 |
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| 231 | /* page/2 sized */
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| 232 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
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| 233 | {
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| 234 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPT));
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| 235 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
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| 236 | if (!((off ^ pPage->GCPhys) & (PAGE_SIZE / 2)))
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| 237 | {
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| 238 | const unsigned iShw = (off / sizeof(X86PTE)) & (X86_PG_PAE_ENTRIES - 1);
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| 239 | LogFlow(("PGMPOOLKIND_PAE_PT_FOR_32BIT_PT iShw=%x\n", iShw));
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| 240 | if (PGMSHWPTEPAE_IS_P(uShw.pPTPae->a[iShw]))
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| 241 | {
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| 242 | X86PTE GstPte;
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| 243 | int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
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| 244 | AssertRC(rc);
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| 245 |
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| 246 | Log4(("pgmPoolMonitorChainChanging pae_32: deref %016RX64 GCPhys %08RX32\n", uShw.pPT->a[iShw].u & X86_PTE_PAE_PG_MASK, GstPte.u & X86_PTE_PG_MASK));
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| 247 | pgmPoolTracDerefGCPhysHint(pPool, pPage,
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| 248 | PGMSHWPTEPAE_GET_HCPHYS(uShw.pPTPae->a[iShw]),
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| 249 | GstPte.u & X86_PTE_PG_MASK,
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| 250 | iShw);
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| 251 | PGMSHWPTEPAE_ATOMIC_SET(uShw.pPTPae->a[iShw], 0);
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| 252 | }
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| 253 | }
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| 254 | break;
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| 255 | }
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| 256 |
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| 257 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
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| 258 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
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| 259 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
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| 260 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
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| 261 | {
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| 262 | unsigned iGst = off / sizeof(X86PDE);
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| 263 | unsigned iShwPdpt = iGst / 256;
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| 264 | unsigned iShw = (iGst % 256) * 2;
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| 265 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
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| 266 |
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| 267 | LogFlow(("pgmPoolMonitorChainChanging PAE for 32 bits: iGst=%x iShw=%x idx = %d page idx=%d\n", iGst, iShw, iShwPdpt, pPage->enmKind - PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD));
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| 268 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPD));
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| 269 | if (iShwPdpt == pPage->enmKind - (unsigned)PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD)
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| 270 | {
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| 271 | for (unsigned i = 0; i < 2; i++)
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| 272 | {
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| 273 | X86PGPAEUINT const uPde = uShw.pPDPae->a[iShw + i].u;
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| 274 | if (uPde & X86_PDE_P)
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| 275 | {
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| 276 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw + i, uPde));
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| 277 | pgmPoolFree(pVM, uPde & X86_PDE_PAE_PG_MASK, pPage->idx, iShw + i);
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| 278 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw + i].u, 0);
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| 279 | }
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| 280 |
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| 281 | /* paranoia / a bit assumptive. */
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| 282 | if ( (off & 3)
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| 283 | && (off & 3) + cbWrite > 4)
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| 284 | {
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| 285 | const unsigned iShw2 = iShw + 2 + i;
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| 286 | if (iShw2 < RT_ELEMENTS(uShw.pPDPae->a))
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| 287 | {
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| 288 | X86PGPAEUINT const uPde2 = uShw.pPDPae->a[iShw2].u;
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| 289 | if (uPde2 & X86_PDE_P)
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| 290 | {
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| 291 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw2, uPde2));
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| 292 | pgmPoolFree(pVM, uPde2 & X86_PDE_PAE_PG_MASK, pPage->idx, iShw2);
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| 293 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw2].u, 0);
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| 294 | }
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| 295 | }
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| 296 | }
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| 297 | }
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| 298 | }
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| 299 | break;
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| 300 | }
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| 301 |
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| 302 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
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| 303 | {
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| 304 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
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| 305 | const unsigned iShw = off / sizeof(X86PTEPAE);
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| 306 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPT));
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| 307 | if (PGMSHWPTEPAE_IS_P(uShw.pPTPae->a[iShw]))
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| 308 | {
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| 309 | X86PTEPAE GstPte;
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| 310 | int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
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| 311 | AssertRC(rc);
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| 312 |
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| 313 | Log4(("pgmPoolMonitorChainChanging pae: deref %016RX64 GCPhys %016RX64\n", PGMSHWPTEPAE_GET_HCPHYS(uShw.pPTPae->a[iShw]), GstPte.u & X86_PTE_PAE_PG_MASK));
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| 314 | pgmPoolTracDerefGCPhysHint(pPool, pPage,
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| 315 | PGMSHWPTEPAE_GET_HCPHYS(uShw.pPTPae->a[iShw]),
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| 316 | GstPte.u & X86_PTE_PAE_PG_MASK,
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| 317 | iShw);
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| 318 | PGMSHWPTEPAE_ATOMIC_SET(uShw.pPTPae->a[iShw], 0);
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| 319 | }
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| 320 |
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| 321 | /* paranoia / a bit assumptive. */
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| 322 | if ( (off & 7)
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| 323 | && (off & 7) + cbWrite > sizeof(X86PTEPAE))
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| 324 | {
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| 325 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PTEPAE);
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| 326 | AssertBreak(iShw2 < RT_ELEMENTS(uShw.pPTPae->a));
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| 327 |
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| 328 | if (PGMSHWPTEPAE_IS_P(uShw.pPTPae->a[iShw2]))
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| 329 | {
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| 330 | X86PTEPAE GstPte;
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| 331 | int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte,
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| 332 | pvAddress ? (uint8_t const *)pvAddress + sizeof(GstPte) : NULL,
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| 333 | GCPhysFault + sizeof(GstPte), sizeof(GstPte));
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|---|
| 334 | AssertRC(rc);
|
|---|
| 335 | Log4(("pgmPoolMonitorChainChanging pae: deref %016RX64 GCPhys %016RX64\n", PGMSHWPTEPAE_GET_HCPHYS(uShw.pPTPae->a[iShw2]), GstPte.u & X86_PTE_PAE_PG_MASK));
|
|---|
| 336 | pgmPoolTracDerefGCPhysHint(pPool, pPage,
|
|---|
| 337 | PGMSHWPTEPAE_GET_HCPHYS(uShw.pPTPae->a[iShw2]),
|
|---|
| 338 | GstPte.u & X86_PTE_PAE_PG_MASK,
|
|---|
| 339 | iShw2);
|
|---|
| 340 | PGMSHWPTEPAE_ATOMIC_SET(uShw.pPTPae->a[iShw2], 0);
|
|---|
| 341 | }
|
|---|
| 342 | }
|
|---|
| 343 | break;
|
|---|
| 344 | }
|
|---|
| 345 |
|
|---|
| 346 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 347 | {
|
|---|
| 348 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 349 | const unsigned iShw = off / sizeof(X86PTE); // ASSUMING 32-bit guest paging!
|
|---|
| 350 |
|
|---|
| 351 | LogFlow(("pgmPoolMonitorChainChanging: PGMPOOLKIND_32BIT_PD %x\n", iShw));
|
|---|
| 352 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPD));
|
|---|
| 353 | X86PGUINT const uPde = uShw.pPD->a[iShw].u;
|
|---|
| 354 | if (uPde & X86_PDE_P)
|
|---|
| 355 | {
|
|---|
| 356 | LogFlow(("pgmPoolMonitorChainChanging: 32 bit pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uPde));
|
|---|
| 357 | pgmPoolFree(pVM, uPde & X86_PDE_PG_MASK, pPage->idx, iShw);
|
|---|
| 358 | ASMAtomicWriteU32(&uShw.pPD->a[iShw].u, 0);
|
|---|
| 359 | }
|
|---|
| 360 |
|
|---|
| 361 | /* paranoia / a bit assumptive. */
|
|---|
| 362 | if ( (off & 3)
|
|---|
| 363 | && (off & 3) + cbWrite > sizeof(X86PTE))
|
|---|
| 364 | {
|
|---|
| 365 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PTE);
|
|---|
| 366 | if ( iShw2 != iShw
|
|---|
| 367 | && iShw2 < RT_ELEMENTS(uShw.pPD->a))
|
|---|
| 368 | {
|
|---|
| 369 | X86PGUINT const uPde2 = uShw.pPD->a[iShw2].u;
|
|---|
| 370 | if (uPde2 & X86_PDE_P)
|
|---|
| 371 | {
|
|---|
| 372 | LogFlow(("pgmPoolMonitorChainChanging: 32 bit pd iShw=%#x: %RX64 -> freeing it!\n", iShw2, uPde2));
|
|---|
| 373 | pgmPoolFree(pVM, uPde2 & X86_PDE_PG_MASK, pPage->idx, iShw2);
|
|---|
| 374 | ASMAtomicWriteU32(&uShw.pPD->a[iShw2].u, 0);
|
|---|
| 375 | }
|
|---|
| 376 | }
|
|---|
| 377 | }
|
|---|
| 378 | #if 0 /* useful when running PGMAssertCR3(), a bit too troublesome for general use (TLBs). - not working any longer... */
|
|---|
| 379 | if ( uShw.pPD->a[iShw].n.u1Present
|
|---|
| 380 | && !VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3))
|
|---|
| 381 | {
|
|---|
| 382 | LogFlow(("pgmPoolMonitorChainChanging: iShw=%#x: %RX32 -> freeing it!\n", iShw, uShw.pPD->a[iShw].u));
|
|---|
| 383 | pgmPoolFree(pVM, uShw.pPD->a[iShw].u & X86_PDE_PG_MASK, pPage->idx, iShw);
|
|---|
| 384 | ASMAtomicWriteU32(&uShw.pPD->a[iShw].u, 0);
|
|---|
| 385 | }
|
|---|
| 386 | #endif
|
|---|
| 387 | break;
|
|---|
| 388 | }
|
|---|
| 389 |
|
|---|
| 390 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 391 | {
|
|---|
| 392 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 393 | const unsigned iShw = off / sizeof(X86PDEPAE);
|
|---|
| 394 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPD));
|
|---|
| 395 |
|
|---|
| 396 | /*
|
|---|
| 397 | * Causes trouble when the guest uses a PDE to refer to the whole page table level
|
|---|
| 398 | * structure. (Invalidate here; faults later on when it tries to change the page
|
|---|
| 399 | * table entries -> recheck; probably only applies to the RC case.)
|
|---|
| 400 | */
|
|---|
| 401 | X86PGPAEUINT const uPde = uShw.pPDPae->a[iShw].u;
|
|---|
| 402 | if (uPde & X86_PDE_P)
|
|---|
| 403 | {
|
|---|
| 404 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uPde));
|
|---|
| 405 | pgmPoolFree(pVM, uPde & X86_PDE_PAE_PG_MASK, pPage->idx, iShw);
|
|---|
| 406 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw].u, 0);
|
|---|
| 407 | }
|
|---|
| 408 |
|
|---|
| 409 | /* paranoia / a bit assumptive. */
|
|---|
| 410 | if ( (off & 7)
|
|---|
| 411 | && (off & 7) + cbWrite > sizeof(X86PDEPAE))
|
|---|
| 412 | {
|
|---|
| 413 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDEPAE);
|
|---|
| 414 | AssertBreak(iShw2 < RT_ELEMENTS(uShw.pPDPae->a));
|
|---|
| 415 |
|
|---|
| 416 | X86PGPAEUINT const uPde2 = uShw.pPDPae->a[iShw2].u;
|
|---|
| 417 | if (uPde2 & X86_PDE_P)
|
|---|
| 418 | {
|
|---|
| 419 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uPde2));
|
|---|
| 420 | pgmPoolFree(pVM, uPde2 & X86_PDE_PAE_PG_MASK, pPage->idx, iShw2);
|
|---|
| 421 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw2].u, 0);
|
|---|
| 422 | }
|
|---|
| 423 | }
|
|---|
| 424 | break;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 428 | {
|
|---|
| 429 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPDPT));
|
|---|
| 430 | /*
|
|---|
| 431 | * Hopefully this doesn't happen very often:
|
|---|
| 432 | * - touching unused parts of the page
|
|---|
| 433 | * - messing with the bits of pd pointers without changing the physical address
|
|---|
| 434 | */
|
|---|
| 435 | /* PDPT roots are not page aligned; 32 byte only! */
|
|---|
| 436 | const unsigned offPdpt = GCPhysFault - pPage->GCPhys;
|
|---|
| 437 |
|
|---|
| 438 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 439 | const unsigned iShw = offPdpt / sizeof(X86PDPE);
|
|---|
| 440 | if (iShw < X86_PG_PAE_PDPE_ENTRIES) /* don't use RT_ELEMENTS(uShw.pPDPT->a), because that's for long mode only */
|
|---|
| 441 | {
|
|---|
| 442 | X86PGPAEUINT const uPdpe = uShw.pPDPT->a[iShw].u;
|
|---|
| 443 | if (uPdpe & X86_PDPE_P)
|
|---|
| 444 | {
|
|---|
| 445 | LogFlow(("pgmPoolMonitorChainChanging: pae pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPDPT->a[iShw].u));
|
|---|
| 446 | pgmPoolFree(pVM, uPdpe & X86_PDPE_PG_MASK, pPage->idx, iShw);
|
|---|
| 447 | ASMAtomicWriteU64(&uShw.pPDPT->a[iShw].u, 0);
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | /* paranoia / a bit assumptive. */
|
|---|
| 451 | if ( (offPdpt & 7)
|
|---|
| 452 | && (offPdpt & 7) + cbWrite > sizeof(X86PDPE))
|
|---|
| 453 | {
|
|---|
| 454 | const unsigned iShw2 = (offPdpt + cbWrite - 1) / sizeof(X86PDPE);
|
|---|
| 455 | if ( iShw2 != iShw
|
|---|
| 456 | && iShw2 < X86_PG_PAE_PDPE_ENTRIES)
|
|---|
| 457 | {
|
|---|
| 458 | X86PGPAEUINT const uPdpe2 = uShw.pPDPT->a[iShw2].u;
|
|---|
| 459 | if (uPdpe2 & X86_PDPE_P)
|
|---|
| 460 | {
|
|---|
| 461 | LogFlow(("pgmPoolMonitorChainChanging: pae pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPT->a[iShw2].u));
|
|---|
| 462 | pgmPoolFree(pVM, uPdpe2 & X86_PDPE_PG_MASK, pPage->idx, iShw2);
|
|---|
| 463 | ASMAtomicWriteU64(&uShw.pPDPT->a[iShw2].u, 0);
|
|---|
| 464 | }
|
|---|
| 465 | }
|
|---|
| 466 | }
|
|---|
| 467 | }
|
|---|
| 468 | break;
|
|---|
| 469 | }
|
|---|
| 470 |
|
|---|
| 471 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 472 | {
|
|---|
| 473 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPD));
|
|---|
| 474 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 475 | const unsigned iShw = off / sizeof(X86PDEPAE);
|
|---|
| 476 | X86PGPAEUINT const uPde = uShw.pPDPae->a[iShw].u;
|
|---|
| 477 | if (uPde & X86_PDE_P)
|
|---|
| 478 | {
|
|---|
| 479 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uPde));
|
|---|
| 480 | pgmPoolFree(pVM, uPde & X86_PDE_PAE_PG_MASK, pPage->idx, iShw);
|
|---|
| 481 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw].u, 0);
|
|---|
| 482 | }
|
|---|
| 483 |
|
|---|
| 484 | /* paranoia / a bit assumptive. */
|
|---|
| 485 | if ( (off & 7)
|
|---|
| 486 | && (off & 7) + cbWrite > sizeof(X86PDEPAE))
|
|---|
| 487 | {
|
|---|
| 488 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDEPAE);
|
|---|
| 489 | AssertBreak(iShw2 < RT_ELEMENTS(uShw.pPDPae->a));
|
|---|
| 490 | X86PGPAEUINT const uPde2 = uShw.pPDPae->a[iShw2].u;
|
|---|
| 491 | if (uPde2 & X86_PDE_P)
|
|---|
| 492 | {
|
|---|
| 493 | LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uPde2));
|
|---|
| 494 | pgmPoolFree(pVM, uPde2 & X86_PDE_PAE_PG_MASK, pPage->idx, iShw2);
|
|---|
| 495 | ASMAtomicWriteU64(&uShw.pPDPae->a[iShw2].u, 0);
|
|---|
| 496 | }
|
|---|
| 497 | }
|
|---|
| 498 | break;
|
|---|
| 499 | }
|
|---|
| 500 |
|
|---|
| 501 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 502 | {
|
|---|
| 503 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPDPT));
|
|---|
| 504 | /*
|
|---|
| 505 | * Hopefully this doesn't happen very often:
|
|---|
| 506 | * - messing with the bits of pd pointers without changing the physical address
|
|---|
| 507 | */
|
|---|
| 508 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 509 | const unsigned iShw = off / sizeof(X86PDPE);
|
|---|
| 510 | X86PGPAEUINT const uPdpe = uShw.pPDPT->a[iShw].u;
|
|---|
| 511 | if (uPdpe & X86_PDPE_P)
|
|---|
| 512 | {
|
|---|
| 513 | LogFlow(("pgmPoolMonitorChainChanging: pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw, uPdpe));
|
|---|
| 514 | pgmPoolFree(pVM, uPdpe & X86_PDPE_PG_MASK, pPage->idx, iShw);
|
|---|
| 515 | ASMAtomicWriteU64(&uShw.pPDPT->a[iShw].u, 0);
|
|---|
| 516 | }
|
|---|
| 517 | /* paranoia / a bit assumptive. */
|
|---|
| 518 | if ( (off & 7)
|
|---|
| 519 | && (off & 7) + cbWrite > sizeof(X86PDPE))
|
|---|
| 520 | {
|
|---|
| 521 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDPE);
|
|---|
| 522 | X86PGPAEUINT const uPdpe2 = uShw.pPDPT->a[iShw2].u;
|
|---|
| 523 | if (uPdpe2 & X86_PDPE_P)
|
|---|
| 524 | {
|
|---|
| 525 | LogFlow(("pgmPoolMonitorChainChanging: pdpt iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uPdpe2));
|
|---|
| 526 | pgmPoolFree(pVM, uPdpe2 & X86_PDPE_PG_MASK, pPage->idx, iShw2);
|
|---|
| 527 | ASMAtomicWriteU64(&uShw.pPDPT->a[iShw2].u, 0);
|
|---|
| 528 | }
|
|---|
| 529 | }
|
|---|
| 530 | break;
|
|---|
| 531 | }
|
|---|
| 532 |
|
|---|
| 533 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 534 | {
|
|---|
| 535 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,FaultPML4));
|
|---|
| 536 | /*
|
|---|
| 537 | * Hopefully this doesn't happen very often:
|
|---|
| 538 | * - messing with the bits of pd pointers without changing the physical address
|
|---|
| 539 | */
|
|---|
| 540 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 541 | const unsigned iShw = off / sizeof(X86PDPE);
|
|---|
| 542 | X86PGPAEUINT const uPml4e = uShw.pPML4->a[iShw].u;
|
|---|
| 543 | if (uPml4e & X86_PML4E_P)
|
|---|
| 544 | {
|
|---|
| 545 | LogFlow(("pgmPoolMonitorChainChanging: pml4 iShw=%#x: %RX64 -> freeing it!\n", iShw, uPml4e));
|
|---|
| 546 | pgmPoolFree(pVM, uPml4e & X86_PML4E_PG_MASK, pPage->idx, iShw);
|
|---|
| 547 | ASMAtomicWriteU64(&uShw.pPML4->a[iShw].u, 0);
|
|---|
| 548 | }
|
|---|
| 549 | /* paranoia / a bit assumptive. */
|
|---|
| 550 | if ( (off & 7)
|
|---|
| 551 | && (off & 7) + cbWrite > sizeof(X86PDPE))
|
|---|
| 552 | {
|
|---|
| 553 | const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PML4E);
|
|---|
| 554 | X86PGPAEUINT const uPml4e2 = uShw.pPML4->a[iShw2].u;
|
|---|
| 555 | if (uPml4e2 & X86_PML4E_P)
|
|---|
| 556 | {
|
|---|
| 557 | LogFlow(("pgmPoolMonitorChainChanging: pml4 iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uPml4e2));
|
|---|
| 558 | pgmPoolFree(pVM, uPml4e2 & X86_PML4E_PG_MASK, pPage->idx, iShw2);
|
|---|
| 559 | ASMAtomicWriteU64(&uShw.pPML4->a[iShw2].u, 0);
|
|---|
| 560 | }
|
|---|
| 561 | }
|
|---|
| 562 | break;
|
|---|
| 563 | }
|
|---|
| 564 |
|
|---|
| 565 | default:
|
|---|
| 566 | AssertFatalMsgFailed(("enmKind=%d\n", pPage->enmKind));
|
|---|
| 567 | }
|
|---|
| 568 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, uShw.pv);
|
|---|
| 569 |
|
|---|
| 570 | /* next */
|
|---|
| 571 | if (pPage->iMonitoredNext == NIL_PGMPOOL_IDX)
|
|---|
| 572 | return;
|
|---|
| 573 | pPage = &pPool->aPages[pPage->iMonitoredNext];
|
|---|
| 574 | }
|
|---|
| 575 | }
|
|---|
| 576 |
|
|---|
| 577 | #ifndef IN_RING3
|
|---|
| 578 |
|
|---|
| 579 | /**
|
|---|
| 580 | * Checks if a access could be a fork operation in progress.
|
|---|
| 581 | *
|
|---|
| 582 | * Meaning, that the guest is setting up the parent process for Copy-On-Write.
|
|---|
| 583 | *
|
|---|
| 584 | * @returns true if it's likely that we're forking, otherwise false.
|
|---|
| 585 | * @param pPool The pool.
|
|---|
| 586 | * @param pDis The disassembled instruction.
|
|---|
| 587 | * @param offFault The access offset.
|
|---|
| 588 | */
|
|---|
| 589 | DECLINLINE(bool) pgmRZPoolMonitorIsForking(PPGMPOOL pPool, PDISCPUSTATE pDis, unsigned offFault)
|
|---|
| 590 | {
|
|---|
| 591 | /*
|
|---|
| 592 | * i386 linux is using btr to clear X86_PTE_RW.
|
|---|
| 593 | * The functions involved are (2.6.16 source inspection):
|
|---|
| 594 | * clear_bit
|
|---|
| 595 | * ptep_set_wrprotect
|
|---|
| 596 | * copy_one_pte
|
|---|
| 597 | * copy_pte_range
|
|---|
| 598 | * copy_pmd_range
|
|---|
| 599 | * copy_pud_range
|
|---|
| 600 | * copy_page_range
|
|---|
| 601 | * dup_mmap
|
|---|
| 602 | * dup_mm
|
|---|
| 603 | * copy_mm
|
|---|
| 604 | * copy_process
|
|---|
| 605 | * do_fork
|
|---|
| 606 | */
|
|---|
| 607 | if ( pDis->pCurInstr->uOpcode == OP_BTR
|
|---|
| 608 | && !(offFault & 4)
|
|---|
| 609 | /** @todo Validate that the bit index is X86_PTE_RW. */
|
|---|
| 610 | )
|
|---|
| 611 | {
|
|---|
| 612 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitorPf,Fork)); RT_NOREF_PV(pPool);
|
|---|
| 613 | return true;
|
|---|
| 614 | }
|
|---|
| 615 | return false;
|
|---|
| 616 | }
|
|---|
| 617 |
|
|---|
| 618 |
|
|---|
| 619 | /**
|
|---|
| 620 | * Determine whether the page is likely to have been reused.
|
|---|
| 621 | *
|
|---|
| 622 | * @returns true if we consider the page as being reused for a different purpose.
|
|---|
| 623 | * @returns false if we consider it to still be a paging page.
|
|---|
| 624 | * @param pVM The cross context VM structure.
|
|---|
| 625 | * @param pVCpu The cross context virtual CPU structure.
|
|---|
| 626 | * @param pRegFrame Trap register frame.
|
|---|
| 627 | * @param pDis The disassembly info for the faulting instruction.
|
|---|
| 628 | * @param pvFault The fault address.
|
|---|
| 629 | * @param pPage The pool page being accessed.
|
|---|
| 630 | *
|
|---|
| 631 | * @remark The REP prefix check is left to the caller because of STOSD/W.
|
|---|
| 632 | */
|
|---|
| 633 | DECLINLINE(bool) pgmRZPoolMonitorIsReused(PVMCC pVM, PVMCPUCC pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pDis, RTGCPTR pvFault,
|
|---|
| 634 | PPGMPOOLPAGE pPage)
|
|---|
| 635 | {
|
|---|
| 636 | /* Locked (CR3, PDPTR*4) should not be reusable. Considering them as
|
|---|
| 637 | such may cause loops booting tst-ubuntu-15_10-64-efi, ++. */
|
|---|
| 638 | if (pPage->cLocked)
|
|---|
| 639 | {
|
|---|
| 640 | Log2(("pgmRZPoolMonitorIsReused: %RGv (%p) can't have been resued, because it's locked!\n", pvFault, pPage));
|
|---|
| 641 | return false;
|
|---|
| 642 | }
|
|---|
| 643 |
|
|---|
| 644 | /** @todo could make this general, faulting close to rsp should be a safe reuse heuristic. */
|
|---|
| 645 | if ( HMHasPendingIrq(pVM)
|
|---|
| 646 | && pRegFrame->rsp - pvFault < 32)
|
|---|
| 647 | {
|
|---|
| 648 | /* Fault caused by stack writes while trying to inject an interrupt event. */
|
|---|
| 649 | Log(("pgmRZPoolMonitorIsReused: reused %RGv for interrupt stack (rsp=%RGv).\n", pvFault, pRegFrame->rsp));
|
|---|
| 650 | return true;
|
|---|
| 651 | }
|
|---|
| 652 |
|
|---|
| 653 | LogFlow(("Reused instr %RGv %d at %RGv param1.fUse=%llx param1.reg=%d\n", pRegFrame->rip, pDis->pCurInstr->uOpcode, pvFault, pDis->Param1.fUse, pDis->Param1.Base.idxGenReg));
|
|---|
| 654 |
|
|---|
| 655 | /* Non-supervisor mode write means it's used for something else. */
|
|---|
| 656 | if (CPUMGetGuestCPL(pVCpu) == 3)
|
|---|
| 657 | return true;
|
|---|
| 658 |
|
|---|
| 659 | switch (pDis->pCurInstr->uOpcode)
|
|---|
| 660 | {
|
|---|
| 661 | /* call implies the actual push of the return address faulted */
|
|---|
| 662 | case OP_CALL:
|
|---|
| 663 | Log4(("pgmRZPoolMonitorIsReused: CALL\n"));
|
|---|
| 664 | return true;
|
|---|
| 665 | case OP_PUSH:
|
|---|
| 666 | Log4(("pgmRZPoolMonitorIsReused: PUSH\n"));
|
|---|
| 667 | return true;
|
|---|
| 668 | case OP_PUSHF:
|
|---|
| 669 | Log4(("pgmRZPoolMonitorIsReused: PUSHF\n"));
|
|---|
| 670 | return true;
|
|---|
| 671 | case OP_PUSHA:
|
|---|
| 672 | Log4(("pgmRZPoolMonitorIsReused: PUSHA\n"));
|
|---|
| 673 | return true;
|
|---|
| 674 | case OP_FXSAVE:
|
|---|
| 675 | Log4(("pgmRZPoolMonitorIsReused: FXSAVE\n"));
|
|---|
| 676 | return true;
|
|---|
| 677 | case OP_MOVNTI: /* solaris - block_zero_no_xmm */
|
|---|
| 678 | Log4(("pgmRZPoolMonitorIsReused: MOVNTI\n"));
|
|---|
| 679 | return true;
|
|---|
| 680 | case OP_MOVNTDQ: /* solaris - hwblkclr & hwblkpagecopy */
|
|---|
| 681 | Log4(("pgmRZPoolMonitorIsReused: MOVNTDQ\n"));
|
|---|
| 682 | return true;
|
|---|
| 683 | case OP_MOVSWD:
|
|---|
| 684 | case OP_STOSWD:
|
|---|
| 685 | if ( pDis->fPrefix == (DISPREFIX_REP|DISPREFIX_REX)
|
|---|
| 686 | && pRegFrame->rcx >= 0x40
|
|---|
| 687 | )
|
|---|
| 688 | {
|
|---|
| 689 | Assert(pDis->uCpuMode == DISCPUMODE_64BIT);
|
|---|
| 690 |
|
|---|
| 691 | Log(("pgmRZPoolMonitorIsReused: OP_STOSQ\n"));
|
|---|
| 692 | return true;
|
|---|
| 693 | }
|
|---|
| 694 | break;
|
|---|
| 695 |
|
|---|
| 696 | default:
|
|---|
| 697 | /*
|
|---|
| 698 | * Anything having ESP on the left side means stack writes.
|
|---|
| 699 | */
|
|---|
| 700 | if ( ( (pDis->Param1.fUse & DISUSE_REG_GEN32)
|
|---|
| 701 | || (pDis->Param1.fUse & DISUSE_REG_GEN64))
|
|---|
| 702 | && (pDis->Param1.Base.idxGenReg == DISGREG_ESP))
|
|---|
| 703 | {
|
|---|
| 704 | Log4(("pgmRZPoolMonitorIsReused: ESP\n"));
|
|---|
| 705 | return true;
|
|---|
| 706 | }
|
|---|
| 707 | break;
|
|---|
| 708 | }
|
|---|
| 709 |
|
|---|
| 710 | /*
|
|---|
| 711 | * Page table updates are very very unlikely to be crossing page boundraries,
|
|---|
| 712 | * and we don't want to deal with that in pgmPoolMonitorChainChanging and such.
|
|---|
| 713 | */
|
|---|
| 714 | uint32_t const cbWrite = DISGetParamSize(pDis, &pDis->Param1);
|
|---|
| 715 | if ( (((uintptr_t)pvFault + cbWrite) >> X86_PAGE_SHIFT) != ((uintptr_t)pvFault >> X86_PAGE_SHIFT) )
|
|---|
| 716 | {
|
|---|
| 717 | Log4(("pgmRZPoolMonitorIsReused: cross page write\n"));
|
|---|
| 718 | return true;
|
|---|
| 719 | }
|
|---|
| 720 |
|
|---|
| 721 | /*
|
|---|
| 722 | * Nobody does an unaligned 8 byte write to a page table, right.
|
|---|
| 723 | */
|
|---|
| 724 | if (cbWrite >= 8 && ((uintptr_t)pvFault & 7) != 0)
|
|---|
| 725 | {
|
|---|
| 726 | Log4(("pgmRZPoolMonitorIsReused: Unaligned 8+ byte write\n"));
|
|---|
| 727 | return true;
|
|---|
| 728 | }
|
|---|
| 729 |
|
|---|
| 730 | return false;
|
|---|
| 731 | }
|
|---|
| 732 |
|
|---|
| 733 |
|
|---|
| 734 | /**
|
|---|
| 735 | * Flushes the page being accessed.
|
|---|
| 736 | *
|
|---|
| 737 | * @returns VBox status code suitable for scheduling.
|
|---|
| 738 | * @param pVM The cross context VM structure.
|
|---|
| 739 | * @param pVCpu The cross context virtual CPU structure.
|
|---|
| 740 | * @param pPool The pool.
|
|---|
| 741 | * @param pPage The pool page (head).
|
|---|
| 742 | * @param pDis The disassembly of the write instruction.
|
|---|
| 743 | * @param pRegFrame The trap register frame.
|
|---|
| 744 | * @param GCPhysFault The fault address as guest physical address.
|
|---|
| 745 | * @param pvFault The fault address.
|
|---|
| 746 | * @todo VBOXSTRICTRC
|
|---|
| 747 | */
|
|---|
| 748 | static int pgmRZPoolAccessPfHandlerFlush(PVMCC pVM, PVMCPUCC pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pDis,
|
|---|
| 749 | PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault)
|
|---|
| 750 | {
|
|---|
| 751 | NOREF(pVM); NOREF(GCPhysFault);
|
|---|
| 752 |
|
|---|
| 753 | /*
|
|---|
| 754 | * First, do the flushing.
|
|---|
| 755 | */
|
|---|
| 756 | pgmPoolMonitorChainFlush(pPool, pPage);
|
|---|
| 757 |
|
|---|
| 758 | /*
|
|---|
| 759 | * Emulate the instruction (xp/w2k problem, requires pc/cr2/sp detection).
|
|---|
| 760 | * Must do this in raw mode (!); XP boot will fail otherwise.
|
|---|
| 761 | */
|
|---|
| 762 | int rc = VINF_SUCCESS;
|
|---|
| 763 | VBOXSTRICTRC rc2 = EMInterpretInstructionDisasState(pVCpu, pDis, pRegFrame, pvFault, EMCODETYPE_ALL);
|
|---|
| 764 | if (rc2 == VINF_SUCCESS)
|
|---|
| 765 | { /* do nothing */ }
|
|---|
| 766 | else if (rc2 == VINF_EM_RESCHEDULE)
|
|---|
| 767 | {
|
|---|
| 768 | rc = VBOXSTRICTRC_VAL(rc2);
|
|---|
| 769 | # ifndef IN_RING3
|
|---|
| 770 | VMCPU_FF_SET(pVCpu, VMCPU_FF_TO_R3);
|
|---|
| 771 | # endif
|
|---|
| 772 | }
|
|---|
| 773 | else if (rc2 == VERR_EM_INTERPRETER)
|
|---|
| 774 | {
|
|---|
| 775 | rc = VINF_EM_RAW_EMULATE_INSTR;
|
|---|
| 776 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitorPf,EmulateInstr));
|
|---|
| 777 | }
|
|---|
| 778 | else if (RT_FAILURE_NP(rc2))
|
|---|
| 779 | rc = VBOXSTRICTRC_VAL(rc2);
|
|---|
| 780 | else
|
|---|
| 781 | AssertMsgFailed(("%Rrc\n", VBOXSTRICTRC_VAL(rc2))); /* ASSUMES no complicated stuff here. */
|
|---|
| 782 |
|
|---|
| 783 | LogFlow(("pgmRZPoolAccessPfHandlerFlush: returns %Rrc (flushed)\n", rc));
|
|---|
| 784 | return rc;
|
|---|
| 785 | }
|
|---|
| 786 |
|
|---|
| 787 |
|
|---|
| 788 | /**
|
|---|
| 789 | * Handles the STOSD write accesses.
|
|---|
| 790 | *
|
|---|
| 791 | * @returns VBox status code suitable for scheduling.
|
|---|
| 792 | * @param pVM The cross context VM structure.
|
|---|
| 793 | * @param pPool The pool.
|
|---|
| 794 | * @param pPage The pool page (head).
|
|---|
| 795 | * @param pDis The disassembly of the write instruction.
|
|---|
| 796 | * @param pRegFrame The trap register frame.
|
|---|
| 797 | * @param GCPhysFault The fault address as guest physical address.
|
|---|
| 798 | * @param pvFault The fault address.
|
|---|
| 799 | */
|
|---|
| 800 | DECLINLINE(int) pgmRZPoolAccessPfHandlerSTOSD(PVMCC pVM, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pDis,
|
|---|
| 801 | PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault)
|
|---|
| 802 | {
|
|---|
| 803 | unsigned uIncrement = pDis->Param1.cb;
|
|---|
| 804 | NOREF(pVM);
|
|---|
| 805 |
|
|---|
| 806 | Assert(pDis->uCpuMode == DISCPUMODE_32BIT || pDis->uCpuMode == DISCPUMODE_64BIT);
|
|---|
| 807 | Assert(pRegFrame->rcx <= 0x20);
|
|---|
| 808 |
|
|---|
| 809 | # ifdef VBOX_STRICT
|
|---|
| 810 | if (pDis->uOpMode == DISCPUMODE_32BIT)
|
|---|
| 811 | Assert(uIncrement == 4);
|
|---|
| 812 | else
|
|---|
| 813 | Assert(uIncrement == 8);
|
|---|
| 814 | # endif
|
|---|
| 815 |
|
|---|
| 816 | Log3(("pgmRZPoolAccessPfHandlerSTOSD\n"));
|
|---|
| 817 |
|
|---|
| 818 | /*
|
|---|
| 819 | * Increment the modification counter and insert it into the list
|
|---|
| 820 | * of modified pages the first time.
|
|---|
| 821 | */
|
|---|
| 822 | if (!pPage->cModifications++)
|
|---|
| 823 | pgmPoolMonitorModifiedInsert(pPool, pPage);
|
|---|
| 824 |
|
|---|
| 825 | /*
|
|---|
| 826 | * Execute REP STOSD.
|
|---|
| 827 | *
|
|---|
| 828 | * This ASSUMES that we're not invoked by Trap0e on in a out-of-sync
|
|---|
| 829 | * write situation, meaning that it's safe to write here.
|
|---|
| 830 | */
|
|---|
| 831 | PVMCPUCC pVCpu = VMMGetCpu(pPool->CTX_SUFF(pVM));
|
|---|
| 832 | RTGCUINTPTR pu32 = (RTGCUINTPTR)pvFault;
|
|---|
| 833 | while (pRegFrame->rcx)
|
|---|
| 834 | {
|
|---|
| 835 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, NULL, uIncrement);
|
|---|
| 836 | PGMPhysSimpleWriteGCPhys(pVM, GCPhysFault, &pRegFrame->rax, uIncrement);
|
|---|
| 837 | pu32 += uIncrement;
|
|---|
| 838 | GCPhysFault += uIncrement;
|
|---|
| 839 | pRegFrame->rdi += uIncrement;
|
|---|
| 840 | pRegFrame->rcx--;
|
|---|
| 841 | }
|
|---|
| 842 | pRegFrame->rip += pDis->cbInstr;
|
|---|
| 843 |
|
|---|
| 844 | LogFlow(("pgmRZPoolAccessPfHandlerSTOSD: returns\n"));
|
|---|
| 845 | return VINF_SUCCESS;
|
|---|
| 846 | }
|
|---|
| 847 |
|
|---|
| 848 |
|
|---|
| 849 | /**
|
|---|
| 850 | * Handles the simple write accesses.
|
|---|
| 851 | *
|
|---|
| 852 | * @returns VBox status code suitable for scheduling.
|
|---|
| 853 | * @param pVM The cross context VM structure.
|
|---|
| 854 | * @param pVCpu The cross context virtual CPU structure.
|
|---|
| 855 | * @param pPool The pool.
|
|---|
| 856 | * @param pPage The pool page (head).
|
|---|
| 857 | * @param pDis The disassembly of the write instruction.
|
|---|
| 858 | * @param pRegFrame The trap register frame.
|
|---|
| 859 | * @param GCPhysFault The fault address as guest physical address.
|
|---|
| 860 | * @param pvFault The fault address.
|
|---|
| 861 | * @param pfReused Reused state (in/out)
|
|---|
| 862 | */
|
|---|
| 863 | DECLINLINE(int) pgmRZPoolAccessPfHandlerSimple(PVMCC pVM, PVMCPUCC pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pDis,
|
|---|
| 864 | PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault, bool *pfReused)
|
|---|
| 865 | {
|
|---|
| 866 | Log3(("pgmRZPoolAccessPfHandlerSimple\n"));
|
|---|
| 867 | NOREF(pVM);
|
|---|
| 868 | NOREF(pfReused); /* initialized by caller */
|
|---|
| 869 |
|
|---|
| 870 | /*
|
|---|
| 871 | * Increment the modification counter and insert it into the list
|
|---|
| 872 | * of modified pages the first time.
|
|---|
| 873 | */
|
|---|
| 874 | if (!pPage->cModifications++)
|
|---|
| 875 | pgmPoolMonitorModifiedInsert(pPool, pPage);
|
|---|
| 876 |
|
|---|
| 877 | /*
|
|---|
| 878 | * Clear all the pages. ASSUMES that pvFault is readable.
|
|---|
| 879 | */
|
|---|
| 880 | uint32_t cbWrite = DISGetParamSize(pDis, &pDis->Param1);
|
|---|
| 881 | if (cbWrite <= 8)
|
|---|
| 882 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, NULL, cbWrite);
|
|---|
| 883 | else if (cbWrite <= 16)
|
|---|
| 884 | {
|
|---|
| 885 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, NULL, 8);
|
|---|
| 886 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault + 8, NULL, cbWrite - 8);
|
|---|
| 887 | }
|
|---|
| 888 | else
|
|---|
| 889 | {
|
|---|
| 890 | Assert(cbWrite <= 32);
|
|---|
| 891 | for (uint32_t off = 0; off < cbWrite; off += 8)
|
|---|
| 892 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault + off, NULL, RT_MIN(8, cbWrite - off));
|
|---|
| 893 | }
|
|---|
| 894 |
|
|---|
| 895 | /*
|
|---|
| 896 | * Interpret the instruction.
|
|---|
| 897 | */
|
|---|
| 898 | VBOXSTRICTRC rc = EMInterpretInstructionDisasState(pVCpu, pDis, pRegFrame, pvFault, EMCODETYPE_ALL);
|
|---|
| 899 | if (RT_SUCCESS(rc))
|
|---|
| 900 | AssertMsg(rc == VINF_SUCCESS, ("%Rrc\n", VBOXSTRICTRC_VAL(rc))); /* ASSUMES no complicated stuff here. */
|
|---|
| 901 | else if (rc == VERR_EM_INTERPRETER)
|
|---|
| 902 | {
|
|---|
| 903 | LogFlow(("pgmRZPoolAccessPfHandlerSimple: Interpretation failed for %04x:%RGv - opcode=%d\n",
|
|---|
| 904 | pRegFrame->cs.Sel, (RTGCPTR)pRegFrame->rip, pDis->pCurInstr->uOpcode));
|
|---|
| 905 | rc = VINF_EM_RAW_EMULATE_INSTR;
|
|---|
| 906 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitorPf,EmulateInstr));
|
|---|
| 907 | }
|
|---|
| 908 |
|
|---|
| 909 | # if 0 /* experimental code */
|
|---|
| 910 | if (rc == VINF_SUCCESS)
|
|---|
| 911 | {
|
|---|
| 912 | switch (pPage->enmKind)
|
|---|
| 913 | {
|
|---|
| 914 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 915 | {
|
|---|
| 916 | X86PTEPAE GstPte;
|
|---|
| 917 | int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvFault, GCPhysFault, sizeof(GstPte));
|
|---|
| 918 | AssertRC(rc);
|
|---|
| 919 |
|
|---|
| 920 | /* Check the new value written by the guest. If present and with a bogus physical address, then
|
|---|
| 921 | * it's fairly safe to assume the guest is reusing the PT.
|
|---|
| 922 | */
|
|---|
| 923 | if (GstPte.n.u1Present)
|
|---|
| 924 | {
|
|---|
| 925 | RTHCPHYS HCPhys = -1;
|
|---|
| 926 | int rc = PGMPhysGCPhys2HCPhys(pVM, GstPte.u & X86_PTE_PAE_PG_MASK, &HCPhys);
|
|---|
| 927 | if (rc != VINF_SUCCESS)
|
|---|
| 928 | {
|
|---|
| 929 | *pfReused = true;
|
|---|
| 930 | STAM_COUNTER_INC(&pPool->StatForceFlushReused);
|
|---|
| 931 | }
|
|---|
| 932 | }
|
|---|
| 933 | break;
|
|---|
| 934 | }
|
|---|
| 935 | }
|
|---|
| 936 | }
|
|---|
| 937 | # endif
|
|---|
| 938 |
|
|---|
| 939 | LogFlow(("pgmRZPoolAccessPfHandlerSimple: returns %Rrc\n", VBOXSTRICTRC_VAL(rc)));
|
|---|
| 940 | return VBOXSTRICTRC_VAL(rc);
|
|---|
| 941 | }
|
|---|
| 942 |
|
|---|
| 943 |
|
|---|
| 944 | /**
|
|---|
| 945 | * @callback_method_impl{FNPGMRZPHYSPFHANDLER,
|
|---|
| 946 | * \#PF access handler callback for page table pages.}
|
|---|
| 947 | *
|
|---|
| 948 | * @remarks The @a uUser argument is the index of the PGMPOOLPAGE.
|
|---|
| 949 | */
|
|---|
| 950 | DECLCALLBACK(VBOXSTRICTRC) pgmRZPoolAccessPfHandler(PVMCC pVM, PVMCPUCC pVCpu, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame,
|
|---|
| 951 | RTGCPTR pvFault, RTGCPHYS GCPhysFault, uint64_t uUser)
|
|---|
| 952 | {
|
|---|
| 953 | STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorRZ, a);
|
|---|
| 954 | PPGMPOOL const pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 955 | AssertReturn(uUser < pPool->cCurPages, VERR_PGM_POOL_IPE);
|
|---|
| 956 | PPGMPOOLPAGE const pPage = &pPool->aPages[uUser];
|
|---|
| 957 | unsigned cMaxModifications;
|
|---|
| 958 | bool fForcedFlush = false;
|
|---|
| 959 | RT_NOREF_PV(uErrorCode);
|
|---|
| 960 |
|
|---|
| 961 | LogFlow(("pgmRZPoolAccessPfHandler: pvFault=%RGv pPage=%p:{.idx=%d} GCPhysFault=%RGp\n", pvFault, pPage, pPage->idx, GCPhysFault));
|
|---|
| 962 |
|
|---|
| 963 | PGM_LOCK_VOID(pVM);
|
|---|
| 964 | if (PHYS_PAGE_ADDRESS(GCPhysFault) != PHYS_PAGE_ADDRESS(pPage->GCPhys))
|
|---|
| 965 | {
|
|---|
| 966 | /* Pool page changed while we were waiting for the lock; ignore. */
|
|---|
| 967 | Log(("CPU%d: pgmRZPoolAccessPfHandler pgm pool page for %RGp changed (to %RGp) while waiting!\n", pVCpu->idCpu, PHYS_PAGE_ADDRESS(GCPhysFault), PHYS_PAGE_ADDRESS(pPage->GCPhys)));
|
|---|
| 968 | STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorPfRZ, &pPool->StatMonitorPfRZHandled, a);
|
|---|
| 969 | PGM_UNLOCK(pVM);
|
|---|
| 970 | return VINF_SUCCESS;
|
|---|
| 971 | }
|
|---|
| 972 | # ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 973 | if (pPage->fDirty)
|
|---|
| 974 | {
|
|---|
| 975 | Assert(VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_TLB_FLUSH));
|
|---|
| 976 | PGM_UNLOCK(pVM);
|
|---|
| 977 | return VINF_SUCCESS; /* SMP guest case where we were blocking on the pgm lock while the same page was being marked dirty. */
|
|---|
| 978 | }
|
|---|
| 979 | # endif
|
|---|
| 980 |
|
|---|
| 981 | # if 0 /* test code defined(VBOX_STRICT) && defined(PGMPOOL_WITH_OPTIMIZED_DIRTY_PT) */
|
|---|
| 982 | if (pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 983 | {
|
|---|
| 984 | void *pvShw = PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pPage);
|
|---|
| 985 | void *pvGst;
|
|---|
| 986 | int rc = PGM_GCPHYS_2_PTR(pPool->CTX_SUFF(pVM), pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 987 | pgmPoolTrackCheckPTPaePae(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PTPAE)pvGst);
|
|---|
| 988 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 989 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvShw);
|
|---|
| 990 | }
|
|---|
| 991 | # endif
|
|---|
| 992 |
|
|---|
| 993 | /*
|
|---|
| 994 | * Disassemble the faulting instruction.
|
|---|
| 995 | */
|
|---|
| 996 | PDISCPUSTATE pDis = &pVCpu->pgm.s.DisState;
|
|---|
| 997 | int rc = EMInterpretDisasCurrent(pVM, pVCpu, pDis, NULL);
|
|---|
| 998 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
|
|---|
| 999 | {
|
|---|
| 1000 | AssertMsg(rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT, ("Unexpected rc %d\n", rc));
|
|---|
| 1001 | PGM_UNLOCK(pVM);
|
|---|
| 1002 | return rc;
|
|---|
| 1003 | }
|
|---|
| 1004 |
|
|---|
| 1005 | Assert(pPage->enmKind != PGMPOOLKIND_FREE);
|
|---|
| 1006 |
|
|---|
| 1007 | /*
|
|---|
| 1008 | * We should ALWAYS have the list head as user parameter. This
|
|---|
| 1009 | * is because we use that page to record the changes.
|
|---|
| 1010 | */
|
|---|
| 1011 | Assert(pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
|
|---|
| 1012 |
|
|---|
| 1013 | # ifdef IN_RING0
|
|---|
| 1014 | /* Maximum nr of modifications depends on the page type. */
|
|---|
| 1015 | if ( pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT
|
|---|
| 1016 | || pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_32BIT_PT)
|
|---|
| 1017 | cMaxModifications = 4;
|
|---|
| 1018 | else
|
|---|
| 1019 | cMaxModifications = 24;
|
|---|
| 1020 | # else
|
|---|
| 1021 | cMaxModifications = 48;
|
|---|
| 1022 | # endif
|
|---|
| 1023 |
|
|---|
| 1024 | /*
|
|---|
| 1025 | * Incremental page table updates should weigh more than random ones.
|
|---|
| 1026 | * (Only applies when started from offset 0)
|
|---|
| 1027 | */
|
|---|
| 1028 | pVCpu->pgm.s.cPoolAccessHandler++;
|
|---|
| 1029 | if ( pPage->GCPtrLastAccessHandlerRip >= pRegFrame->rip - 0x40 /* observed loops in Windows 7 x64 */
|
|---|
| 1030 | && pPage->GCPtrLastAccessHandlerRip < pRegFrame->rip + 0x40
|
|---|
| 1031 | && pvFault == (pPage->GCPtrLastAccessHandlerFault + pDis->Param1.cb)
|
|---|
| 1032 | && pVCpu->pgm.s.cPoolAccessHandler == pPage->cLastAccessHandler + 1)
|
|---|
| 1033 | {
|
|---|
| 1034 | Log(("Possible page reuse cMods=%d -> %d (locked=%d type=%s)\n", pPage->cModifications, pPage->cModifications * 2, pgmPoolIsPageLocked(pPage), pgmPoolPoolKindToStr(pPage->enmKind)));
|
|---|
| 1035 | Assert(pPage->cModifications < 32000);
|
|---|
| 1036 | pPage->cModifications = pPage->cModifications * 2;
|
|---|
| 1037 | pPage->GCPtrLastAccessHandlerFault = pvFault;
|
|---|
| 1038 | pPage->cLastAccessHandler = pVCpu->pgm.s.cPoolAccessHandler;
|
|---|
| 1039 | if (pPage->cModifications >= cMaxModifications)
|
|---|
| 1040 | {
|
|---|
| 1041 | STAM_COUNTER_INC(&pPool->StatMonitorPfRZFlushReinit);
|
|---|
| 1042 | fForcedFlush = true;
|
|---|
| 1043 | }
|
|---|
| 1044 | }
|
|---|
| 1045 |
|
|---|
| 1046 | if (pPage->cModifications >= cMaxModifications)
|
|---|
| 1047 | Log(("Mod overflow %RGv cMods=%d (locked=%d type=%s)\n", pvFault, pPage->cModifications, pgmPoolIsPageLocked(pPage), pgmPoolPoolKindToStr(pPage->enmKind)));
|
|---|
| 1048 |
|
|---|
| 1049 | /*
|
|---|
| 1050 | * Check if it's worth dealing with.
|
|---|
| 1051 | */
|
|---|
| 1052 | bool fReused = false;
|
|---|
| 1053 | bool fNotReusedNotForking = false;
|
|---|
| 1054 | if ( ( pPage->cModifications < cMaxModifications /** @todo \#define */ /** @todo need to check that it's not mapping EIP. */ /** @todo adjust this! */
|
|---|
| 1055 | || pgmPoolIsPageLocked(pPage)
|
|---|
| 1056 | )
|
|---|
| 1057 | && !(fReused = pgmRZPoolMonitorIsReused(pVM, pVCpu, pRegFrame, pDis, pvFault, pPage))
|
|---|
| 1058 | && !pgmRZPoolMonitorIsForking(pPool, pDis, GCPhysFault & PAGE_OFFSET_MASK))
|
|---|
| 1059 | {
|
|---|
| 1060 | /*
|
|---|
| 1061 | * Simple instructions, no REP prefix.
|
|---|
| 1062 | */
|
|---|
| 1063 | if (!(pDis->fPrefix & (DISPREFIX_REP | DISPREFIX_REPNE)))
|
|---|
| 1064 | {
|
|---|
| 1065 | rc = pgmRZPoolAccessPfHandlerSimple(pVM, pVCpu, pPool, pPage, pDis, pRegFrame, GCPhysFault, pvFault, &fReused);
|
|---|
| 1066 | if (fReused)
|
|---|
| 1067 | goto flushPage;
|
|---|
| 1068 |
|
|---|
| 1069 | /* A mov instruction to change the first page table entry will be remembered so we can detect
|
|---|
| 1070 | * full page table changes early on. This will reduce the amount of unnecessary traps we'll take.
|
|---|
| 1071 | */
|
|---|
| 1072 | if ( rc == VINF_SUCCESS
|
|---|
| 1073 | && !pPage->cLocked /* only applies to unlocked pages as we can't free locked ones (e.g. cr3 root). */
|
|---|
| 1074 | && pDis->pCurInstr->uOpcode == OP_MOV
|
|---|
| 1075 | && (pvFault & PAGE_OFFSET_MASK) == 0)
|
|---|
| 1076 | {
|
|---|
| 1077 | pPage->GCPtrLastAccessHandlerFault = pvFault;
|
|---|
| 1078 | pPage->cLastAccessHandler = pVCpu->pgm.s.cPoolAccessHandler;
|
|---|
| 1079 | pPage->GCPtrLastAccessHandlerRip = pRegFrame->rip;
|
|---|
| 1080 | /* Make sure we don't kick out a page too quickly. */
|
|---|
| 1081 | if (pPage->cModifications > 8)
|
|---|
| 1082 | pPage->cModifications = 2;
|
|---|
| 1083 | }
|
|---|
| 1084 | else if (pPage->GCPtrLastAccessHandlerFault == pvFault)
|
|---|
| 1085 | {
|
|---|
| 1086 | /* ignore the 2nd write to this page table entry. */
|
|---|
| 1087 | pPage->cLastAccessHandler = pVCpu->pgm.s.cPoolAccessHandler;
|
|---|
| 1088 | }
|
|---|
| 1089 | else
|
|---|
| 1090 | {
|
|---|
| 1091 | pPage->GCPtrLastAccessHandlerFault = NIL_RTGCPTR;
|
|---|
| 1092 | pPage->GCPtrLastAccessHandlerRip = 0;
|
|---|
| 1093 | }
|
|---|
| 1094 |
|
|---|
| 1095 | STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorPfRZ, &pPool->StatMonitorPfRZHandled, a);
|
|---|
| 1096 | PGM_UNLOCK(pVM);
|
|---|
| 1097 | return rc;
|
|---|
| 1098 | }
|
|---|
| 1099 |
|
|---|
| 1100 | /*
|
|---|
| 1101 | * Windows is frequently doing small memset() operations (netio test 4k+).
|
|---|
| 1102 | * We have to deal with these or we'll kill the cache and performance.
|
|---|
| 1103 | */
|
|---|
| 1104 | if ( pDis->pCurInstr->uOpcode == OP_STOSWD
|
|---|
| 1105 | && !pRegFrame->eflags.Bits.u1DF
|
|---|
| 1106 | && pDis->uOpMode == pDis->uCpuMode
|
|---|
| 1107 | && pDis->uAddrMode == pDis->uCpuMode)
|
|---|
| 1108 | {
|
|---|
| 1109 | bool fValidStosd = false;
|
|---|
| 1110 |
|
|---|
| 1111 | if ( pDis->uCpuMode == DISCPUMODE_32BIT
|
|---|
| 1112 | && pDis->fPrefix == DISPREFIX_REP
|
|---|
| 1113 | && pRegFrame->ecx <= 0x20
|
|---|
| 1114 | && pRegFrame->ecx * 4 <= GUEST_PAGE_SIZE - ((uintptr_t)pvFault & GUEST_PAGE_OFFSET_MASK)
|
|---|
| 1115 | && !((uintptr_t)pvFault & 3)
|
|---|
| 1116 | && (pRegFrame->eax == 0 || pRegFrame->eax == 0x80) /* the two values observed. */
|
|---|
| 1117 | )
|
|---|
| 1118 | {
|
|---|
| 1119 | fValidStosd = true;
|
|---|
| 1120 | pRegFrame->rcx &= 0xffffffff; /* paranoia */
|
|---|
| 1121 | }
|
|---|
| 1122 | else
|
|---|
| 1123 | if ( pDis->uCpuMode == DISCPUMODE_64BIT
|
|---|
| 1124 | && pDis->fPrefix == (DISPREFIX_REP | DISPREFIX_REX)
|
|---|
| 1125 | && pRegFrame->rcx <= 0x20
|
|---|
| 1126 | && pRegFrame->rcx * 8 <= GUEST_PAGE_SIZE - ((uintptr_t)pvFault & GUEST_PAGE_OFFSET_MASK)
|
|---|
| 1127 | && !((uintptr_t)pvFault & 7)
|
|---|
| 1128 | && (pRegFrame->rax == 0 || pRegFrame->rax == 0x80) /* the two values observed. */
|
|---|
| 1129 | )
|
|---|
| 1130 | {
|
|---|
| 1131 | fValidStosd = true;
|
|---|
| 1132 | }
|
|---|
| 1133 |
|
|---|
| 1134 | if (fValidStosd)
|
|---|
| 1135 | {
|
|---|
| 1136 | rc = pgmRZPoolAccessPfHandlerSTOSD(pVM, pPool, pPage, pDis, pRegFrame, GCPhysFault, pvFault);
|
|---|
| 1137 | STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorPfRZ, &pPool->StatMonitorPfRZRepStosd, a);
|
|---|
| 1138 | PGM_UNLOCK(pVM);
|
|---|
| 1139 | return rc;
|
|---|
| 1140 | }
|
|---|
| 1141 | }
|
|---|
| 1142 |
|
|---|
| 1143 | /* REP prefix, don't bother. */
|
|---|
| 1144 | STAM_COUNTER_INC(&pPool->StatMonitorPfRZRepPrefix);
|
|---|
| 1145 | Log4(("pgmRZPoolAccessPfHandler: eax=%#x ecx=%#x edi=%#x esi=%#x rip=%RGv opcode=%d prefix=%#x\n",
|
|---|
| 1146 | pRegFrame->eax, pRegFrame->ecx, pRegFrame->edi, pRegFrame->esi, (RTGCPTR)pRegFrame->rip, pDis->pCurInstr->uOpcode, pDis->fPrefix));
|
|---|
| 1147 | fNotReusedNotForking = true;
|
|---|
| 1148 | }
|
|---|
| 1149 |
|
|---|
| 1150 | # if defined(PGMPOOL_WITH_OPTIMIZED_DIRTY_PT) && defined(IN_RING0)
|
|---|
| 1151 | /* E.g. Windows 7 x64 initializes page tables and touches some pages in the table during the process. This
|
|---|
| 1152 | * leads to pgm pool trashing and an excessive amount of write faults due to page monitoring.
|
|---|
| 1153 | */
|
|---|
| 1154 | if ( pPage->cModifications >= cMaxModifications
|
|---|
| 1155 | && !fForcedFlush
|
|---|
| 1156 | && (pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT || pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_32BIT_PT)
|
|---|
| 1157 | && ( fNotReusedNotForking
|
|---|
| 1158 | || ( !pgmRZPoolMonitorIsReused(pVM, pVCpu, pRegFrame, pDis, pvFault, pPage)
|
|---|
| 1159 | && !pgmRZPoolMonitorIsForking(pPool, pDis, GCPhysFault & PAGE_OFFSET_MASK))
|
|---|
| 1160 | )
|
|---|
| 1161 | )
|
|---|
| 1162 | {
|
|---|
| 1163 | Assert(!pgmPoolIsPageLocked(pPage));
|
|---|
| 1164 | Assert(pPage->fDirty == false);
|
|---|
| 1165 |
|
|---|
| 1166 | /* Flush any monitored duplicates as we will disable write protection. */
|
|---|
| 1167 | if ( pPage->iMonitoredNext != NIL_PGMPOOL_IDX
|
|---|
| 1168 | || pPage->iMonitoredPrev != NIL_PGMPOOL_IDX)
|
|---|
| 1169 | {
|
|---|
| 1170 | PPGMPOOLPAGE pPageHead = pPage;
|
|---|
| 1171 |
|
|---|
| 1172 | /* Find the monitor head. */
|
|---|
| 1173 | while (pPageHead->iMonitoredPrev != NIL_PGMPOOL_IDX)
|
|---|
| 1174 | pPageHead = &pPool->aPages[pPageHead->iMonitoredPrev];
|
|---|
| 1175 |
|
|---|
| 1176 | while (pPageHead)
|
|---|
| 1177 | {
|
|---|
| 1178 | unsigned idxNext = pPageHead->iMonitoredNext;
|
|---|
| 1179 |
|
|---|
| 1180 | if (pPageHead != pPage)
|
|---|
| 1181 | {
|
|---|
| 1182 | STAM_COUNTER_INC(&pPool->StatDirtyPageDupFlush);
|
|---|
| 1183 | Log(("Flush duplicate page idx=%d GCPhys=%RGp type=%s\n", pPageHead->idx, pPageHead->GCPhys, pgmPoolPoolKindToStr(pPageHead->enmKind)));
|
|---|
| 1184 | int rc2 = pgmPoolFlushPage(pPool, pPageHead);
|
|---|
| 1185 | AssertRC(rc2);
|
|---|
| 1186 | }
|
|---|
| 1187 |
|
|---|
| 1188 | if (idxNext == NIL_PGMPOOL_IDX)
|
|---|
| 1189 | break;
|
|---|
| 1190 |
|
|---|
| 1191 | pPageHead = &pPool->aPages[idxNext];
|
|---|
| 1192 | }
|
|---|
| 1193 | }
|
|---|
| 1194 |
|
|---|
| 1195 | /* The flushing above might fail for locked pages, so double check. */
|
|---|
| 1196 | if ( pPage->iMonitoredNext == NIL_PGMPOOL_IDX
|
|---|
| 1197 | && pPage->iMonitoredPrev == NIL_PGMPOOL_IDX)
|
|---|
| 1198 | {
|
|---|
| 1199 | pgmPoolAddDirtyPage(pVM, pPool, pPage);
|
|---|
| 1200 |
|
|---|
| 1201 | /* Temporarily allow write access to the page table again. */
|
|---|
| 1202 | rc = PGMHandlerPhysicalPageTempOff(pVM,
|
|---|
| 1203 | pPage->GCPhys & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK,
|
|---|
| 1204 | pPage->GCPhys & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK);
|
|---|
| 1205 | if (rc == VINF_SUCCESS)
|
|---|
| 1206 | {
|
|---|
| 1207 | rc = PGMShwMakePageWritable(pVCpu, pvFault, PGM_MK_PG_IS_WRITE_FAULT);
|
|---|
| 1208 | AssertMsg(rc == VINF_SUCCESS
|
|---|
| 1209 | /* In the SMP case the page table might be removed while we wait for the PGM lock in the trap handler. */
|
|---|
| 1210 | || rc == VERR_PAGE_TABLE_NOT_PRESENT
|
|---|
| 1211 | || rc == VERR_PAGE_NOT_PRESENT,
|
|---|
| 1212 | ("PGMShwModifyPage -> GCPtr=%RGv rc=%d\n", pvFault, rc));
|
|---|
| 1213 | # ifdef VBOX_STRICT
|
|---|
| 1214 | pPage->GCPtrDirtyFault = pvFault;
|
|---|
| 1215 | # endif
|
|---|
| 1216 |
|
|---|
| 1217 | STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorPfRZ, a);
|
|---|
| 1218 | PGM_UNLOCK(pVM);
|
|---|
| 1219 | return rc;
|
|---|
| 1220 | }
|
|---|
| 1221 | }
|
|---|
| 1222 | }
|
|---|
| 1223 | # endif /* PGMPOOL_WITH_OPTIMIZED_DIRTY_PT && IN_RING0 */
|
|---|
| 1224 |
|
|---|
| 1225 | STAM_COUNTER_INC(&pPool->StatMonitorPfRZFlushModOverflow);
|
|---|
| 1226 | flushPage:
|
|---|
| 1227 | /*
|
|---|
| 1228 | * Not worth it, so flush it.
|
|---|
| 1229 | *
|
|---|
| 1230 | * If we considered it to be reused, don't go back to ring-3
|
|---|
| 1231 | * to emulate failed instructions since we usually cannot
|
|---|
| 1232 | * interpret then. This may be a bit risky, in which case
|
|---|
| 1233 | * the reuse detection must be fixed.
|
|---|
| 1234 | */
|
|---|
| 1235 | rc = pgmRZPoolAccessPfHandlerFlush(pVM, pVCpu, pPool, pPage, pDis, pRegFrame, GCPhysFault, pvFault);
|
|---|
| 1236 | if ( rc == VINF_EM_RAW_EMULATE_INSTR
|
|---|
| 1237 | && fReused)
|
|---|
| 1238 | {
|
|---|
| 1239 | /* Make sure that the current instruction still has shadow page backing, otherwise we'll end up in a loop. */
|
|---|
| 1240 | if (PGMShwGetPage(pVCpu, pRegFrame->rip, NULL, NULL) == VINF_SUCCESS)
|
|---|
| 1241 | rc = VINF_SUCCESS; /* safe to restart the instruction. */
|
|---|
| 1242 | }
|
|---|
| 1243 | STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->StatMonitorPfRZ, &pPool->StatMonitorPfRZFlushPage, a);
|
|---|
| 1244 | PGM_UNLOCK(pVM);
|
|---|
| 1245 | return rc;
|
|---|
| 1246 | }
|
|---|
| 1247 |
|
|---|
| 1248 | #endif /* !IN_RING3 */
|
|---|
| 1249 |
|
|---|
| 1250 | /**
|
|---|
| 1251 | * @callback_method_impl{FNPGMPHYSHANDLER,
|
|---|
| 1252 | * Access handler for shadowed page table pages.}
|
|---|
| 1253 | *
|
|---|
| 1254 | * @remarks Only uses the VINF_PGM_HANDLER_DO_DEFAULT status.
|
|---|
| 1255 | * @note The @a uUser argument is the index of the PGMPOOLPAGE.
|
|---|
| 1256 | */
|
|---|
| 1257 | DECLCALLBACK(VBOXSTRICTRC)
|
|---|
| 1258 | pgmPoolAccessHandler(PVMCC pVM, PVMCPUCC pVCpu, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf,
|
|---|
| 1259 | PGMACCESSTYPE enmAccessType, PGMACCESSORIGIN enmOrigin, uint64_t uUser)
|
|---|
| 1260 | {
|
|---|
| 1261 | PPGMPOOL const pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 1262 | STAM_PROFILE_START(&pPool->CTX_SUFF_Z(StatMonitor), a);
|
|---|
| 1263 | AssertReturn(uUser < pPool->cCurPages, VERR_PGM_POOL_IPE);
|
|---|
| 1264 | PPGMPOOLPAGE const pPage = &pPool->aPages[uUser];
|
|---|
| 1265 | LogFlow(("PGM_ALL_CB_DECL: GCPhys=%RGp %p:{.Core=%RHp, .idx=%d, .GCPhys=%RGp, .enmType=%d}\n",
|
|---|
| 1266 | GCPhys, pPage, pPage->Core.Key, pPage->idx, pPage->GCPhys, pPage->enmKind));
|
|---|
| 1267 |
|
|---|
| 1268 | NOREF(pvPhys); NOREF(pvBuf); NOREF(enmAccessType);
|
|---|
| 1269 |
|
|---|
| 1270 | PGM_LOCK_VOID(pVM);
|
|---|
| 1271 |
|
|---|
| 1272 | #ifdef VBOX_WITH_STATISTICS
|
|---|
| 1273 | /*
|
|---|
| 1274 | * Collect stats on the access.
|
|---|
| 1275 | */
|
|---|
| 1276 | AssertCompile(RT_ELEMENTS(pPool->CTX_MID_Z(aStatMonitor,Sizes)) == 19);
|
|---|
| 1277 | if (cbBuf <= 16 && cbBuf > 0)
|
|---|
| 1278 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(aStatMonitor,Sizes)[cbBuf - 1]);
|
|---|
| 1279 | else if (cbBuf >= 17 && cbBuf < 32)
|
|---|
| 1280 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(aStatMonitor,Sizes)[16]);
|
|---|
| 1281 | else if (cbBuf >= 32 && cbBuf < 64)
|
|---|
| 1282 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(aStatMonitor,Sizes)[17]);
|
|---|
| 1283 | else if (cbBuf >= 64)
|
|---|
| 1284 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(aStatMonitor,Sizes)[18]);
|
|---|
| 1285 |
|
|---|
| 1286 | uint8_t cbAlign;
|
|---|
| 1287 | switch (pPage->enmKind)
|
|---|
| 1288 | {
|
|---|
| 1289 | default:
|
|---|
| 1290 | cbAlign = 7;
|
|---|
| 1291 | break;
|
|---|
| 1292 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 1293 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 1294 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 1295 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 1296 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 1297 | cbAlign = 3;
|
|---|
| 1298 | break;
|
|---|
| 1299 | }
|
|---|
| 1300 | AssertCompile(RT_ELEMENTS(pPool->CTX_MID_Z(aStatMonitor,Misaligned)) == 7);
|
|---|
| 1301 | if ((uint8_t)GCPhys & cbAlign)
|
|---|
| 1302 | STAM_COUNTER_INC(&pPool->CTX_MID_Z(aStatMonitor,Misaligned)[((uint8_t)GCPhys & cbAlign) - 1]);
|
|---|
| 1303 | #endif
|
|---|
| 1304 |
|
|---|
| 1305 | /*
|
|---|
| 1306 | * Make sure the pool page wasn't modified by a different CPU.
|
|---|
| 1307 | */
|
|---|
| 1308 | if (PHYS_PAGE_ADDRESS(GCPhys) == PHYS_PAGE_ADDRESS(pPage->GCPhys))
|
|---|
| 1309 | {
|
|---|
| 1310 | Assert(pPage->enmKind != PGMPOOLKIND_FREE);
|
|---|
| 1311 |
|
|---|
| 1312 | /* The max modification count before flushing depends on the context and page type. */
|
|---|
| 1313 | #ifdef IN_RING3
|
|---|
| 1314 | uint16_t const cMaxModifications = 96; /* it's cheaper here, right? */
|
|---|
| 1315 | #else
|
|---|
| 1316 | uint16_t cMaxModifications;
|
|---|
| 1317 | if ( pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT
|
|---|
| 1318 | || pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_32BIT_PT)
|
|---|
| 1319 | cMaxModifications = 4;
|
|---|
| 1320 | else
|
|---|
| 1321 | cMaxModifications = 24;
|
|---|
| 1322 | #endif
|
|---|
| 1323 |
|
|---|
| 1324 | /*
|
|---|
| 1325 | * We don't have to be very sophisticated about this since there are relativly few calls here.
|
|---|
| 1326 | * However, we must try our best to detect any non-cpu accesses (disk / networking).
|
|---|
| 1327 | */
|
|---|
| 1328 | if ( ( pPage->cModifications < cMaxModifications
|
|---|
| 1329 | || pgmPoolIsPageLocked(pPage) )
|
|---|
| 1330 | && enmOrigin != PGMACCESSORIGIN_DEVICE
|
|---|
| 1331 | && cbBuf <= 16)
|
|---|
| 1332 | {
|
|---|
| 1333 | /* Clear the shadow entry. */
|
|---|
| 1334 | if (!pPage->cModifications++)
|
|---|
| 1335 | pgmPoolMonitorModifiedInsert(pPool, pPage);
|
|---|
| 1336 |
|
|---|
| 1337 | if (cbBuf <= 8)
|
|---|
| 1338 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys, pvBuf, (uint32_t)cbBuf);
|
|---|
| 1339 | else
|
|---|
| 1340 | {
|
|---|
| 1341 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys, pvBuf, 8);
|
|---|
| 1342 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys + 8, (uint8_t *)pvBuf + 8, (uint32_t)cbBuf - 8);
|
|---|
| 1343 | }
|
|---|
| 1344 | }
|
|---|
| 1345 | else
|
|---|
| 1346 | pgmPoolMonitorChainFlush(pPool, pPage);
|
|---|
| 1347 |
|
|---|
| 1348 | STAM_PROFILE_STOP_EX(&pPool->CTX_SUFF_Z(StatMonitor), &pPool->CTX_MID_Z(StatMonitor,FlushPage), a);
|
|---|
| 1349 | }
|
|---|
| 1350 | else
|
|---|
| 1351 | Log(("CPU%d: PGM_ALL_CB_DECL pgm pool page for %RGp changed (to %RGp) while waiting!\n", pVCpu->idCpu, PHYS_PAGE_ADDRESS(GCPhys), PHYS_PAGE_ADDRESS(pPage->GCPhys)));
|
|---|
| 1352 | PGM_UNLOCK(pVM);
|
|---|
| 1353 | return VINF_PGM_HANDLER_DO_DEFAULT;
|
|---|
| 1354 | }
|
|---|
| 1355 |
|
|---|
| 1356 |
|
|---|
| 1357 | #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 1358 |
|
|---|
| 1359 | # if defined(VBOX_STRICT) && !defined(IN_RING3)
|
|---|
| 1360 |
|
|---|
| 1361 | /**
|
|---|
| 1362 | * Check references to guest physical memory in a PAE / PAE page table.
|
|---|
| 1363 | *
|
|---|
| 1364 | * @param pPool The pool.
|
|---|
| 1365 | * @param pPage The page.
|
|---|
| 1366 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 1367 | * @param pGstPT The guest page table.
|
|---|
| 1368 | */
|
|---|
| 1369 | static void pgmPoolTrackCheckPTPaePae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PTPAE pGstPT)
|
|---|
| 1370 | {
|
|---|
| 1371 | unsigned cErrors = 0;
|
|---|
| 1372 | int LastRc = -1; /* initialized to shut up gcc */
|
|---|
| 1373 | unsigned LastPTE = ~0U; /* initialized to shut up gcc */
|
|---|
| 1374 | RTHCPHYS LastHCPhys = NIL_RTHCPHYS; /* initialized to shut up gcc */
|
|---|
| 1375 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 1376 |
|
|---|
| 1377 | # ifdef VBOX_STRICT
|
|---|
| 1378 | for (unsigned i = 0; i < RT_MIN(RT_ELEMENTS(pShwPT->a), pPage->iFirstPresent); i++)
|
|---|
| 1379 | AssertMsg(!PGMSHWPTEPAE_IS_P(pShwPT->a[i]), ("Unexpected PTE: idx=%d %RX64 (first=%d)\n", i, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), pPage->iFirstPresent));
|
|---|
| 1380 | # endif
|
|---|
| 1381 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 1382 | {
|
|---|
| 1383 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 1384 | {
|
|---|
| 1385 | RTHCPHYS HCPhys = NIL_RTHCPHYS;
|
|---|
| 1386 | int rc = PGMPhysGCPhys2HCPhys(pVM, pGstPT->a[i].u & X86_PTE_PAE_PG_MASK, &HCPhys);
|
|---|
| 1387 | if ( rc != VINF_SUCCESS
|
|---|
| 1388 | || PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]) != HCPhys)
|
|---|
| 1389 | {
|
|---|
| 1390 | Log(("rc=%d idx=%d guest %RX64 shw=%RX64 vs %RHp\n", rc, i, pGstPT->a[i].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), HCPhys));
|
|---|
| 1391 | LastPTE = i;
|
|---|
| 1392 | LastRc = rc;
|
|---|
| 1393 | LastHCPhys = HCPhys;
|
|---|
| 1394 | cErrors++;
|
|---|
| 1395 |
|
|---|
| 1396 | RTHCPHYS HCPhysPT = NIL_RTHCPHYS;
|
|---|
| 1397 | rc = PGMPhysGCPhys2HCPhys(pVM, pPage->GCPhys, &HCPhysPT);
|
|---|
| 1398 | AssertRC(rc);
|
|---|
| 1399 |
|
|---|
| 1400 | for (unsigned iPage = 0; iPage < pPool->cCurPages; iPage++)
|
|---|
| 1401 | {
|
|---|
| 1402 | PPGMPOOLPAGE pTempPage = &pPool->aPages[iPage];
|
|---|
| 1403 |
|
|---|
| 1404 | if (pTempPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 1405 | {
|
|---|
| 1406 | PPGMSHWPTPAE pShwPT2 = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pVM, pTempPage);
|
|---|
| 1407 |
|
|---|
| 1408 | for (unsigned j = 0; j < RT_ELEMENTS(pShwPT->a); j++)
|
|---|
| 1409 | {
|
|---|
| 1410 | if ( PGMSHWPTEPAE_IS_P_RW(pShwPT2->a[j])
|
|---|
| 1411 | && PGMSHWPTEPAE_GET_HCPHYS(pShwPT2->a[j]) == HCPhysPT)
|
|---|
| 1412 | {
|
|---|
| 1413 | Log(("GCPhys=%RGp idx=%d %RX64 vs %RX64\n", pTempPage->GCPhys, j, PGMSHWPTEPAE_GET_LOG(pShwPT->a[j]), PGMSHWPTEPAE_GET_LOG(pShwPT2->a[j])));
|
|---|
| 1414 | }
|
|---|
| 1415 | }
|
|---|
| 1416 |
|
|---|
| 1417 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pShwPT2);
|
|---|
| 1418 | }
|
|---|
| 1419 | }
|
|---|
| 1420 | }
|
|---|
| 1421 | }
|
|---|
| 1422 | }
|
|---|
| 1423 | AssertMsg(!cErrors, ("cErrors=%d: last rc=%d idx=%d guest %RX64 shw=%RX64 vs %RHp\n", cErrors, LastRc, LastPTE, pGstPT->a[LastPTE].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[LastPTE]), LastHCPhys));
|
|---|
| 1424 | }
|
|---|
| 1425 |
|
|---|
| 1426 |
|
|---|
| 1427 | /**
|
|---|
| 1428 | * Check references to guest physical memory in a PAE / 32-bit page table.
|
|---|
| 1429 | *
|
|---|
| 1430 | * @param pPool The pool.
|
|---|
| 1431 | * @param pPage The page.
|
|---|
| 1432 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 1433 | * @param pGstPT The guest page table.
|
|---|
| 1434 | */
|
|---|
| 1435 | static void pgmPoolTrackCheckPTPae32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PT pGstPT)
|
|---|
| 1436 | {
|
|---|
| 1437 | unsigned cErrors = 0;
|
|---|
| 1438 | int LastRc = -1; /* initialized to shut up gcc */
|
|---|
| 1439 | unsigned LastPTE = ~0U; /* initialized to shut up gcc */
|
|---|
| 1440 | RTHCPHYS LastHCPhys = NIL_RTHCPHYS; /* initialized to shut up gcc */
|
|---|
| 1441 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 1442 |
|
|---|
| 1443 | # ifdef VBOX_STRICT
|
|---|
| 1444 | for (unsigned i = 0; i < RT_MIN(RT_ELEMENTS(pShwPT->a), pPage->iFirstPresent); i++)
|
|---|
| 1445 | AssertMsg(!PGMSHWPTEPAE_IS_P(pShwPT->a[i]), ("Unexpected PTE: idx=%d %RX64 (first=%d)\n", i, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), pPage->iFirstPresent));
|
|---|
| 1446 | # endif
|
|---|
| 1447 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 1448 | {
|
|---|
| 1449 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 1450 | {
|
|---|
| 1451 | RTHCPHYS HCPhys = NIL_RTHCPHYS;
|
|---|
| 1452 | int rc = PGMPhysGCPhys2HCPhys(pVM, pGstPT->a[i].u & X86_PTE_PG_MASK, &HCPhys);
|
|---|
| 1453 | if ( rc != VINF_SUCCESS
|
|---|
| 1454 | || PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]) != HCPhys)
|
|---|
| 1455 | {
|
|---|
| 1456 | Log(("rc=%d idx=%d guest %x shw=%RX64 vs %RHp\n", rc, i, pGstPT->a[i].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), HCPhys));
|
|---|
| 1457 | LastPTE = i;
|
|---|
| 1458 | LastRc = rc;
|
|---|
| 1459 | LastHCPhys = HCPhys;
|
|---|
| 1460 | cErrors++;
|
|---|
| 1461 |
|
|---|
| 1462 | RTHCPHYS HCPhysPT = NIL_RTHCPHYS;
|
|---|
| 1463 | rc = PGMPhysGCPhys2HCPhys(pVM, pPage->GCPhys, &HCPhysPT);
|
|---|
| 1464 | AssertRC(rc);
|
|---|
| 1465 |
|
|---|
| 1466 | for (unsigned iPage = 0; iPage < pPool->cCurPages; iPage++)
|
|---|
| 1467 | {
|
|---|
| 1468 | PPGMPOOLPAGE pTempPage = &pPool->aPages[iPage];
|
|---|
| 1469 |
|
|---|
| 1470 | if (pTempPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_32BIT_PT)
|
|---|
| 1471 | {
|
|---|
| 1472 | PPGMSHWPTPAE pShwPT2 = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pVM, pTempPage);
|
|---|
| 1473 |
|
|---|
| 1474 | for (unsigned j = 0; j < RT_ELEMENTS(pShwPT->a); j++)
|
|---|
| 1475 | {
|
|---|
| 1476 | if ( PGMSHWPTEPAE_IS_P_RW(pShwPT2->a[j])
|
|---|
| 1477 | && PGMSHWPTEPAE_GET_HCPHYS(pShwPT2->a[j]) == HCPhysPT)
|
|---|
| 1478 | {
|
|---|
| 1479 | Log(("GCPhys=%RGp idx=%d %RX64 vs %RX64\n", pTempPage->GCPhys, j, PGMSHWPTEPAE_GET_LOG(pShwPT->a[j]), PGMSHWPTEPAE_GET_LOG(pShwPT2->a[j])));
|
|---|
| 1480 | }
|
|---|
| 1481 | }
|
|---|
| 1482 |
|
|---|
| 1483 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pShwPT2);
|
|---|
| 1484 | }
|
|---|
| 1485 | }
|
|---|
| 1486 | }
|
|---|
| 1487 | }
|
|---|
| 1488 | }
|
|---|
| 1489 | AssertMsg(!cErrors, ("cErrors=%d: last rc=%d idx=%d guest %x shw=%RX64 vs %RHp\n", cErrors, LastRc, LastPTE, pGstPT->a[LastPTE].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[LastPTE]), LastHCPhys));
|
|---|
| 1490 | }
|
|---|
| 1491 |
|
|---|
| 1492 | # endif /* VBOX_STRICT && !IN_RING3 */
|
|---|
| 1493 |
|
|---|
| 1494 | /**
|
|---|
| 1495 | * Clear references to guest physical memory in a PAE / PAE page table.
|
|---|
| 1496 | *
|
|---|
| 1497 | * @returns nr of changed PTEs
|
|---|
| 1498 | * @param pPool The pool.
|
|---|
| 1499 | * @param pPage The page.
|
|---|
| 1500 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 1501 | * @param pGstPT The guest page table.
|
|---|
| 1502 | * @param pOldGstPT The old cached guest page table.
|
|---|
| 1503 | * @param fAllowRemoval Bail out as soon as we encounter an invalid PTE
|
|---|
| 1504 | * @param pfFlush Flush reused page table (out)
|
|---|
| 1505 | */
|
|---|
| 1506 | DECLINLINE(unsigned) pgmPoolTrackFlushPTPaePae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PTPAE pGstPT,
|
|---|
| 1507 | PCX86PTPAE pOldGstPT, bool fAllowRemoval, bool *pfFlush)
|
|---|
| 1508 | {
|
|---|
| 1509 | unsigned cChanged = 0;
|
|---|
| 1510 |
|
|---|
| 1511 | # ifdef VBOX_STRICT
|
|---|
| 1512 | for (unsigned i = 0; i < RT_MIN(RT_ELEMENTS(pShwPT->a), pPage->iFirstPresent); i++)
|
|---|
| 1513 | AssertMsg(!PGMSHWPTEPAE_IS_P(pShwPT->a[i]), ("Unexpected PTE: idx=%d %RX64 (first=%d)\n", i, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), pPage->iFirstPresent));
|
|---|
| 1514 | # endif
|
|---|
| 1515 | *pfFlush = false;
|
|---|
| 1516 |
|
|---|
| 1517 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 1518 | {
|
|---|
| 1519 | /* Check the new value written by the guest. If present and with a bogus physical address, then
|
|---|
| 1520 | * it's fairly safe to assume the guest is reusing the PT.
|
|---|
| 1521 | */
|
|---|
| 1522 | if ( fAllowRemoval
|
|---|
| 1523 | && (pGstPT->a[i].u & X86_PTE_P))
|
|---|
| 1524 | {
|
|---|
| 1525 | if (!PGMPhysIsGCPhysValid(pPool->CTX_SUFF(pVM), pGstPT->a[i].u & X86_PTE_PAE_PG_MASK))
|
|---|
| 1526 | {
|
|---|
| 1527 | *pfFlush = true;
|
|---|
| 1528 | return ++cChanged;
|
|---|
| 1529 | }
|
|---|
| 1530 | }
|
|---|
| 1531 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 1532 | {
|
|---|
| 1533 | /* If the old cached PTE is identical, then there's no need to flush the shadow copy. */
|
|---|
| 1534 | if ((pGstPT->a[i].u & X86_PTE_PAE_PG_MASK) == (pOldGstPT->a[i].u & X86_PTE_PAE_PG_MASK))
|
|---|
| 1535 | {
|
|---|
| 1536 | # ifdef VBOX_STRICT
|
|---|
| 1537 | RTHCPHYS HCPhys = NIL_RTGCPHYS;
|
|---|
| 1538 | int rc = PGMPhysGCPhys2HCPhys(pPool->CTX_SUFF(pVM), pGstPT->a[i].u & X86_PTE_PAE_PG_MASK, &HCPhys);
|
|---|
| 1539 | AssertMsg(rc == VINF_SUCCESS && PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]) == HCPhys, ("rc=%d guest %RX64 old %RX64 shw=%RX64 vs %RHp\n", rc, pGstPT->a[i].u, pOldGstPT->a[i].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), HCPhys));
|
|---|
| 1540 | # endif
|
|---|
| 1541 | uint64_t uHostAttr = PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & (X86_PTE_P | X86_PTE_US | X86_PTE_A | X86_PTE_D | X86_PTE_G | X86_PTE_PAE_NX);
|
|---|
| 1542 | bool fHostRW = !!(PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & X86_PTE_RW);
|
|---|
| 1543 | uint64_t uGuestAttr = pGstPT->a[i].u & (X86_PTE_P | X86_PTE_US | X86_PTE_A | X86_PTE_D | X86_PTE_G | X86_PTE_PAE_NX);
|
|---|
| 1544 | bool fGuestRW = !!(pGstPT->a[i].u & X86_PTE_RW);
|
|---|
| 1545 |
|
|---|
| 1546 | if ( uHostAttr == uGuestAttr
|
|---|
| 1547 | && fHostRW <= fGuestRW)
|
|---|
| 1548 | continue;
|
|---|
| 1549 | }
|
|---|
| 1550 | cChanged++;
|
|---|
| 1551 | /* Something was changed, so flush it. */
|
|---|
| 1552 | Log4(("pgmPoolTrackDerefPTPaePae: i=%d pte=%RX64 hint=%RX64\n",
|
|---|
| 1553 | i, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pOldGstPT->a[i].u & X86_PTE_PAE_PG_MASK));
|
|---|
| 1554 | pgmPoolTracDerefGCPhysHint(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pOldGstPT->a[i].u & X86_PTE_PAE_PG_MASK, i);
|
|---|
| 1555 | PGMSHWPTEPAE_ATOMIC_SET(pShwPT->a[i], 0);
|
|---|
| 1556 | }
|
|---|
| 1557 | }
|
|---|
| 1558 | return cChanged;
|
|---|
| 1559 | }
|
|---|
| 1560 |
|
|---|
| 1561 |
|
|---|
| 1562 | /**
|
|---|
| 1563 | * Clear references to guest physical memory in a PAE / PAE page table.
|
|---|
| 1564 | *
|
|---|
| 1565 | * @returns nr of changed PTEs
|
|---|
| 1566 | * @param pPool The pool.
|
|---|
| 1567 | * @param pPage The page.
|
|---|
| 1568 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 1569 | * @param pGstPT The guest page table.
|
|---|
| 1570 | * @param pOldGstPT The old cached guest page table.
|
|---|
| 1571 | * @param fAllowRemoval Bail out as soon as we encounter an invalid PTE
|
|---|
| 1572 | * @param pfFlush Flush reused page table (out)
|
|---|
| 1573 | */
|
|---|
| 1574 | DECLINLINE(unsigned) pgmPoolTrackFlushPTPae32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PT pGstPT,
|
|---|
| 1575 | PCX86PT pOldGstPT, bool fAllowRemoval, bool *pfFlush)
|
|---|
| 1576 | {
|
|---|
| 1577 | unsigned cChanged = 0;
|
|---|
| 1578 |
|
|---|
| 1579 | # ifdef VBOX_STRICT
|
|---|
| 1580 | for (unsigned i = 0; i < RT_MIN(RT_ELEMENTS(pShwPT->a), pPage->iFirstPresent); i++)
|
|---|
| 1581 | AssertMsg(!PGMSHWPTEPAE_IS_P(pShwPT->a[i]), ("Unexpected PTE: idx=%d %RX64 (first=%d)\n", i, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), pPage->iFirstPresent));
|
|---|
| 1582 | # endif
|
|---|
| 1583 | *pfFlush = false;
|
|---|
| 1584 |
|
|---|
| 1585 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 1586 | {
|
|---|
| 1587 | /* Check the new value written by the guest. If present and with a bogus physical address, then
|
|---|
| 1588 | * it's fairly safe to assume the guest is reusing the PT. */
|
|---|
| 1589 | if (fAllowRemoval)
|
|---|
| 1590 | {
|
|---|
| 1591 | X86PGUINT const uPte = pGstPT->a[i].u;
|
|---|
| 1592 | if ( (uPte & X86_PTE_P)
|
|---|
| 1593 | && !PGMPhysIsGCPhysValid(pPool->CTX_SUFF(pVM), uPte & X86_PTE_PG_MASK))
|
|---|
| 1594 | {
|
|---|
| 1595 | *pfFlush = true;
|
|---|
| 1596 | return ++cChanged;
|
|---|
| 1597 | }
|
|---|
| 1598 | }
|
|---|
| 1599 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 1600 | {
|
|---|
| 1601 | /* If the old cached PTE is identical, then there's no need to flush the shadow copy. */
|
|---|
| 1602 | if ((pGstPT->a[i].u & X86_PTE_PG_MASK) == (pOldGstPT->a[i].u & X86_PTE_PG_MASK))
|
|---|
| 1603 | {
|
|---|
| 1604 | # ifdef VBOX_STRICT
|
|---|
| 1605 | RTHCPHYS HCPhys = NIL_RTGCPHYS;
|
|---|
| 1606 | int rc = PGMPhysGCPhys2HCPhys(pPool->CTX_SUFF(pVM), pGstPT->a[i].u & X86_PTE_PG_MASK, &HCPhys);
|
|---|
| 1607 | AssertMsg(rc == VINF_SUCCESS && PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]) == HCPhys, ("rc=%d guest %x old %x shw=%RX64 vs %RHp\n", rc, pGstPT->a[i].u, pOldGstPT->a[i].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[i]), HCPhys));
|
|---|
| 1608 | # endif
|
|---|
| 1609 | uint64_t uHostAttr = PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & (X86_PTE_P | X86_PTE_US | X86_PTE_A | X86_PTE_D | X86_PTE_G);
|
|---|
| 1610 | bool fHostRW = !!(PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & X86_PTE_RW);
|
|---|
| 1611 | uint64_t uGuestAttr = pGstPT->a[i].u & (X86_PTE_P | X86_PTE_US | X86_PTE_A | X86_PTE_D | X86_PTE_G);
|
|---|
| 1612 | bool fGuestRW = !!(pGstPT->a[i].u & X86_PTE_RW);
|
|---|
| 1613 |
|
|---|
| 1614 | if ( uHostAttr == uGuestAttr
|
|---|
| 1615 | && fHostRW <= fGuestRW)
|
|---|
| 1616 | continue;
|
|---|
| 1617 | }
|
|---|
| 1618 | cChanged++;
|
|---|
| 1619 | /* Something was changed, so flush it. */
|
|---|
| 1620 | Log4(("pgmPoolTrackDerefPTPaePae: i=%d pte=%RX64 hint=%x\n",
|
|---|
| 1621 | i, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pOldGstPT->a[i].u & X86_PTE_PG_MASK));
|
|---|
| 1622 | pgmPoolTracDerefGCPhysHint(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pOldGstPT->a[i].u & X86_PTE_PG_MASK, i);
|
|---|
| 1623 | PGMSHWPTEPAE_ATOMIC_SET(pShwPT->a[i], 0);
|
|---|
| 1624 | }
|
|---|
| 1625 | }
|
|---|
| 1626 | return cChanged;
|
|---|
| 1627 | }
|
|---|
| 1628 |
|
|---|
| 1629 |
|
|---|
| 1630 | /**
|
|---|
| 1631 | * Flush a dirty page
|
|---|
| 1632 | *
|
|---|
| 1633 | * @param pVM The cross context VM structure.
|
|---|
| 1634 | * @param pPool The pool.
|
|---|
| 1635 | * @param idxSlot Dirty array slot index
|
|---|
| 1636 | * @param fAllowRemoval Allow a reused page table to be removed
|
|---|
| 1637 | */
|
|---|
| 1638 | static void pgmPoolFlushDirtyPage(PVMCC pVM, PPGMPOOL pPool, unsigned idxSlot, bool fAllowRemoval = false)
|
|---|
| 1639 | {
|
|---|
| 1640 | AssertCompile(RT_ELEMENTS(pPool->aidxDirtyPages) == RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1641 |
|
|---|
| 1642 | Assert(idxSlot < RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1643 | unsigned idxPage = pPool->aidxDirtyPages[idxSlot];
|
|---|
| 1644 | if (idxPage == NIL_PGMPOOL_IDX)
|
|---|
| 1645 | return;
|
|---|
| 1646 |
|
|---|
| 1647 | PPGMPOOLPAGE pPage = &pPool->aPages[idxPage];
|
|---|
| 1648 | Assert(pPage->idx == idxPage);
|
|---|
| 1649 | Assert(pPage->iMonitoredNext == NIL_PGMPOOL_IDX && pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
|
|---|
| 1650 |
|
|---|
| 1651 | AssertMsg(pPage->fDirty, ("Page %RGp (slot=%d) not marked dirty!", pPage->GCPhys, idxSlot));
|
|---|
| 1652 | Log(("Flush dirty page %RGp cMods=%d\n", pPage->GCPhys, pPage->cModifications));
|
|---|
| 1653 |
|
|---|
| 1654 | /* First write protect the page again to catch all write accesses. (before checking for changes -> SMP) */
|
|---|
| 1655 | int rc = PGMHandlerPhysicalReset(pVM, pPage->GCPhys & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK);
|
|---|
| 1656 | Assert(rc == VINF_SUCCESS);
|
|---|
| 1657 | pPage->fDirty = false;
|
|---|
| 1658 |
|
|---|
| 1659 | # ifdef VBOX_STRICT
|
|---|
| 1660 | uint64_t fFlags = 0;
|
|---|
| 1661 | RTHCPHYS HCPhys;
|
|---|
| 1662 | rc = PGMShwGetPage(VMMGetCpu(pVM), pPage->GCPtrDirtyFault, &fFlags, &HCPhys);
|
|---|
| 1663 | AssertMsg( ( rc == VINF_SUCCESS
|
|---|
| 1664 | && (!(fFlags & X86_PTE_RW) || HCPhys != pPage->Core.Key))
|
|---|
| 1665 | /* In the SMP case the page table might be removed while we wait for the PGM lock in the trap handler. */
|
|---|
| 1666 | || rc == VERR_PAGE_TABLE_NOT_PRESENT
|
|---|
| 1667 | || rc == VERR_PAGE_NOT_PRESENT,
|
|---|
| 1668 | ("PGMShwGetPage -> GCPtr=%RGv rc=%d flags=%RX64\n", pPage->GCPtrDirtyFault, rc, fFlags));
|
|---|
| 1669 | # endif
|
|---|
| 1670 |
|
|---|
| 1671 | /* Flush those PTEs that have changed. */
|
|---|
| 1672 | STAM_PROFILE_START(&pPool->StatTrackDeref,a);
|
|---|
| 1673 | void *pvShw = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 1674 | void *pvGst;
|
|---|
| 1675 | rc = PGM_GCPHYS_2_PTR_EX(pVM, pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 1676 | bool fFlush;
|
|---|
| 1677 | unsigned cChanges;
|
|---|
| 1678 |
|
|---|
| 1679 | if (pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 1680 | cChanges = pgmPoolTrackFlushPTPaePae(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PTPAE)pvGst,
|
|---|
| 1681 | (PCX86PTPAE)&pPool->aDirtyPages[idxSlot].aPage[0], fAllowRemoval, &fFlush);
|
|---|
| 1682 | else
|
|---|
| 1683 | cChanges = pgmPoolTrackFlushPTPae32Bit(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PT)pvGst,
|
|---|
| 1684 | (PCX86PT)&pPool->aDirtyPages[idxSlot].aPage[0], fAllowRemoval, &fFlush);
|
|---|
| 1685 |
|
|---|
| 1686 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 1687 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvShw);
|
|---|
| 1688 | STAM_PROFILE_STOP(&pPool->StatTrackDeref,a);
|
|---|
| 1689 | /* Note: we might want to consider keeping the dirty page active in case there were many changes. */
|
|---|
| 1690 |
|
|---|
| 1691 | /* This page is likely to be modified again, so reduce the nr of modifications just a bit here. */
|
|---|
| 1692 | Assert(pPage->cModifications);
|
|---|
| 1693 | if (cChanges < 4)
|
|---|
| 1694 | pPage->cModifications = 1; /* must use > 0 here */
|
|---|
| 1695 | else
|
|---|
| 1696 | pPage->cModifications = RT_MAX(1, pPage->cModifications / 2);
|
|---|
| 1697 |
|
|---|
| 1698 | STAM_COUNTER_INC(&pPool->StatResetDirtyPages);
|
|---|
| 1699 | if (pPool->cDirtyPages == RT_ELEMENTS(pPool->aDirtyPages))
|
|---|
| 1700 | pPool->idxFreeDirtyPage = idxSlot;
|
|---|
| 1701 |
|
|---|
| 1702 | pPool->cDirtyPages--;
|
|---|
| 1703 | pPool->aidxDirtyPages[idxSlot] = NIL_PGMPOOL_IDX;
|
|---|
| 1704 | Assert(pPool->cDirtyPages <= RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1705 | if (fFlush)
|
|---|
| 1706 | {
|
|---|
| 1707 | Assert(fAllowRemoval);
|
|---|
| 1708 | Log(("Flush reused page table!\n"));
|
|---|
| 1709 | pgmPoolFlushPage(pPool, pPage);
|
|---|
| 1710 | STAM_COUNTER_INC(&pPool->StatForceFlushReused);
|
|---|
| 1711 | }
|
|---|
| 1712 | else
|
|---|
| 1713 | Log(("Removed dirty page %RGp cMods=%d cChanges=%d\n", pPage->GCPhys, pPage->cModifications, cChanges));
|
|---|
| 1714 | }
|
|---|
| 1715 |
|
|---|
| 1716 |
|
|---|
| 1717 | # ifndef IN_RING3
|
|---|
| 1718 | /**
|
|---|
| 1719 | * Add a new dirty page
|
|---|
| 1720 | *
|
|---|
| 1721 | * @param pVM The cross context VM structure.
|
|---|
| 1722 | * @param pPool The pool.
|
|---|
| 1723 | * @param pPage The page.
|
|---|
| 1724 | */
|
|---|
| 1725 | void pgmPoolAddDirtyPage(PVMCC pVM, PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 1726 | {
|
|---|
| 1727 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 1728 | AssertCompile(RT_ELEMENTS(pPool->aDirtyPages) == 8 || RT_ELEMENTS(pPool->aDirtyPages) == 16);
|
|---|
| 1729 | Assert(!pPage->fDirty);
|
|---|
| 1730 |
|
|---|
| 1731 | unsigned idxFree = pPool->idxFreeDirtyPage;
|
|---|
| 1732 | Assert(idxFree < RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1733 | Assert(pPage->iMonitoredNext == NIL_PGMPOOL_IDX && pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
|
|---|
| 1734 |
|
|---|
| 1735 | if (pPool->cDirtyPages >= RT_ELEMENTS(pPool->aDirtyPages))
|
|---|
| 1736 | {
|
|---|
| 1737 | STAM_COUNTER_INC(&pPool->StatDirtyPageOverFlowFlush);
|
|---|
| 1738 | pgmPoolFlushDirtyPage(pVM, pPool, idxFree, true /* allow removal of reused page tables*/);
|
|---|
| 1739 | }
|
|---|
| 1740 | Assert(pPool->cDirtyPages < RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1741 | AssertMsg(pPool->aidxDirtyPages[idxFree] == NIL_PGMPOOL_IDX, ("idxFree=%d cDirtyPages=%d\n", idxFree, pPool->cDirtyPages));
|
|---|
| 1742 |
|
|---|
| 1743 | Log(("Add dirty page %RGp (slot=%d)\n", pPage->GCPhys, idxFree));
|
|---|
| 1744 |
|
|---|
| 1745 | /*
|
|---|
| 1746 | * Make a copy of the guest page table as we require valid GCPhys addresses
|
|---|
| 1747 | * when removing references to physical pages.
|
|---|
| 1748 | * (The HCPhys linear lookup is *extremely* expensive!)
|
|---|
| 1749 | */
|
|---|
| 1750 | void *pvGst;
|
|---|
| 1751 | int rc = PGM_GCPHYS_2_PTR_EX(pVM, pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 1752 | memcpy(&pPool->aDirtyPages[idxFree].aPage[0], pvGst,
|
|---|
| 1753 | pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT ? PAGE_SIZE : PAGE_SIZE / 2);
|
|---|
| 1754 | # ifdef VBOX_STRICT
|
|---|
| 1755 | void *pvShw = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 1756 | if (pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 1757 | pgmPoolTrackCheckPTPaePae(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PTPAE)pvGst);
|
|---|
| 1758 | else
|
|---|
| 1759 | pgmPoolTrackCheckPTPae32Bit(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PT)pvGst);
|
|---|
| 1760 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvShw);
|
|---|
| 1761 | # endif
|
|---|
| 1762 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 1763 |
|
|---|
| 1764 | STAM_COUNTER_INC(&pPool->StatDirtyPage);
|
|---|
| 1765 | pPage->fDirty = true;
|
|---|
| 1766 | pPage->idxDirtyEntry = (uint8_t)idxFree; Assert(pPage->idxDirtyEntry == idxFree);
|
|---|
| 1767 | pPool->aidxDirtyPages[idxFree] = pPage->idx;
|
|---|
| 1768 | pPool->cDirtyPages++;
|
|---|
| 1769 |
|
|---|
| 1770 | pPool->idxFreeDirtyPage = (pPool->idxFreeDirtyPage + 1) & (RT_ELEMENTS(pPool->aDirtyPages) - 1);
|
|---|
| 1771 | if ( pPool->cDirtyPages < RT_ELEMENTS(pPool->aDirtyPages)
|
|---|
| 1772 | && pPool->aidxDirtyPages[pPool->idxFreeDirtyPage] != NIL_PGMPOOL_IDX)
|
|---|
| 1773 | {
|
|---|
| 1774 | unsigned i;
|
|---|
| 1775 | for (i = 1; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1776 | {
|
|---|
| 1777 | idxFree = (pPool->idxFreeDirtyPage + i) & (RT_ELEMENTS(pPool->aDirtyPages) - 1);
|
|---|
| 1778 | if (pPool->aidxDirtyPages[idxFree] == NIL_PGMPOOL_IDX)
|
|---|
| 1779 | {
|
|---|
| 1780 | pPool->idxFreeDirtyPage = idxFree;
|
|---|
| 1781 | break;
|
|---|
| 1782 | }
|
|---|
| 1783 | }
|
|---|
| 1784 | Assert(i != RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1785 | }
|
|---|
| 1786 |
|
|---|
| 1787 | Assert(pPool->cDirtyPages == RT_ELEMENTS(pPool->aDirtyPages) || pPool->aidxDirtyPages[pPool->idxFreeDirtyPage] == NIL_PGMPOOL_IDX);
|
|---|
| 1788 |
|
|---|
| 1789 | /*
|
|---|
| 1790 | * Clear all references to this shadow table. See @bugref{7298}.
|
|---|
| 1791 | */
|
|---|
| 1792 | pgmPoolTrackClearPageUsers(pPool, pPage);
|
|---|
| 1793 | }
|
|---|
| 1794 | # endif /* !IN_RING3 */
|
|---|
| 1795 |
|
|---|
| 1796 |
|
|---|
| 1797 | /**
|
|---|
| 1798 | * Check if the specified page is dirty (not write monitored)
|
|---|
| 1799 | *
|
|---|
| 1800 | * @return dirty or not
|
|---|
| 1801 | * @param pVM The cross context VM structure.
|
|---|
| 1802 | * @param GCPhys Guest physical address
|
|---|
| 1803 | */
|
|---|
| 1804 | bool pgmPoolIsDirtyPageSlow(PVMCC pVM, RTGCPHYS GCPhys)
|
|---|
| 1805 | {
|
|---|
| 1806 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 1807 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 1808 | if (!pPool->cDirtyPages)
|
|---|
| 1809 | return false;
|
|---|
| 1810 |
|
|---|
| 1811 | GCPhys = GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
|
|---|
| 1812 |
|
|---|
| 1813 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1814 | {
|
|---|
| 1815 | unsigned idxPage = pPool->aidxDirtyPages[i];
|
|---|
| 1816 | if (idxPage != NIL_PGMPOOL_IDX)
|
|---|
| 1817 | {
|
|---|
| 1818 | PPGMPOOLPAGE pPage = &pPool->aPages[idxPage];
|
|---|
| 1819 | if (pPage->GCPhys == GCPhys)
|
|---|
| 1820 | return true;
|
|---|
| 1821 | }
|
|---|
| 1822 | }
|
|---|
| 1823 | return false;
|
|---|
| 1824 | }
|
|---|
| 1825 |
|
|---|
| 1826 |
|
|---|
| 1827 | /**
|
|---|
| 1828 | * Reset all dirty pages by reinstating page monitoring.
|
|---|
| 1829 | *
|
|---|
| 1830 | * @param pVM The cross context VM structure.
|
|---|
| 1831 | */
|
|---|
| 1832 | void pgmPoolResetDirtyPages(PVMCC pVM)
|
|---|
| 1833 | {
|
|---|
| 1834 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 1835 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 1836 | Assert(pPool->cDirtyPages <= RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1837 |
|
|---|
| 1838 | if (!pPool->cDirtyPages)
|
|---|
| 1839 | return;
|
|---|
| 1840 |
|
|---|
| 1841 | Log(("pgmPoolResetDirtyPages\n"));
|
|---|
| 1842 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1843 | pgmPoolFlushDirtyPage(pVM, pPool, i, true /* allow removal of reused page tables*/);
|
|---|
| 1844 |
|
|---|
| 1845 | pPool->idxFreeDirtyPage = 0;
|
|---|
| 1846 | if ( pPool->cDirtyPages != RT_ELEMENTS(pPool->aDirtyPages)
|
|---|
| 1847 | && pPool->aidxDirtyPages[pPool->idxFreeDirtyPage] != NIL_PGMPOOL_IDX)
|
|---|
| 1848 | {
|
|---|
| 1849 | unsigned i;
|
|---|
| 1850 | for (i = 1; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1851 | {
|
|---|
| 1852 | if (pPool->aidxDirtyPages[i] == NIL_PGMPOOL_IDX)
|
|---|
| 1853 | {
|
|---|
| 1854 | pPool->idxFreeDirtyPage = i;
|
|---|
| 1855 | break;
|
|---|
| 1856 | }
|
|---|
| 1857 | }
|
|---|
| 1858 | AssertMsg(i != RT_ELEMENTS(pPool->aDirtyPages), ("cDirtyPages %d", pPool->cDirtyPages));
|
|---|
| 1859 | }
|
|---|
| 1860 |
|
|---|
| 1861 | Assert(pPool->aidxDirtyPages[pPool->idxFreeDirtyPage] == NIL_PGMPOOL_IDX || pPool->cDirtyPages == RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1862 | return;
|
|---|
| 1863 | }
|
|---|
| 1864 |
|
|---|
| 1865 |
|
|---|
| 1866 | /**
|
|---|
| 1867 | * Invalidate the PT entry for the specified page
|
|---|
| 1868 | *
|
|---|
| 1869 | * @param pVM The cross context VM structure.
|
|---|
| 1870 | * @param GCPtrPage Guest page to invalidate
|
|---|
| 1871 | */
|
|---|
| 1872 | void pgmPoolResetDirtyPage(PVMCC pVM, RTGCPTR GCPtrPage)
|
|---|
| 1873 | {
|
|---|
| 1874 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 1875 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 1876 | Assert(pPool->cDirtyPages <= RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1877 |
|
|---|
| 1878 | if (!pPool->cDirtyPages)
|
|---|
| 1879 | return;
|
|---|
| 1880 |
|
|---|
| 1881 | Log(("pgmPoolResetDirtyPage %RGv\n", GCPtrPage)); RT_NOREF_PV(GCPtrPage);
|
|---|
| 1882 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1883 | {
|
|---|
| 1884 | /** @todo What was intended here??? This looks incomplete... */
|
|---|
| 1885 | }
|
|---|
| 1886 | }
|
|---|
| 1887 |
|
|---|
| 1888 |
|
|---|
| 1889 | /**
|
|---|
| 1890 | * Reset all dirty pages by reinstating page monitoring.
|
|---|
| 1891 | *
|
|---|
| 1892 | * @param pVM The cross context VM structure.
|
|---|
| 1893 | * @param GCPhysPT Physical address of the page table
|
|---|
| 1894 | */
|
|---|
| 1895 | void pgmPoolInvalidateDirtyPage(PVMCC pVM, RTGCPHYS GCPhysPT)
|
|---|
| 1896 | {
|
|---|
| 1897 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 1898 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 1899 | Assert(pPool->cDirtyPages <= RT_ELEMENTS(pPool->aDirtyPages));
|
|---|
| 1900 | unsigned idxDirtyPage = RT_ELEMENTS(pPool->aDirtyPages);
|
|---|
| 1901 |
|
|---|
| 1902 | if (!pPool->cDirtyPages)
|
|---|
| 1903 | return;
|
|---|
| 1904 |
|
|---|
| 1905 | GCPhysPT = GCPhysPT & ~(RTGCPHYS)PAGE_OFFSET_MASK;
|
|---|
| 1906 |
|
|---|
| 1907 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1908 | {
|
|---|
| 1909 | unsigned idxPage = pPool->aidxDirtyPages[i];
|
|---|
| 1910 | if (idxPage != NIL_PGMPOOL_IDX)
|
|---|
| 1911 | {
|
|---|
| 1912 | PPGMPOOLPAGE pPage = &pPool->aPages[idxPage];
|
|---|
| 1913 | if (pPage->GCPhys == GCPhysPT)
|
|---|
| 1914 | {
|
|---|
| 1915 | idxDirtyPage = i;
|
|---|
| 1916 | break;
|
|---|
| 1917 | }
|
|---|
| 1918 | }
|
|---|
| 1919 | }
|
|---|
| 1920 |
|
|---|
| 1921 | if (idxDirtyPage != RT_ELEMENTS(pPool->aDirtyPages))
|
|---|
| 1922 | {
|
|---|
| 1923 | pgmPoolFlushDirtyPage(pVM, pPool, idxDirtyPage, true /* allow removal of reused page tables*/);
|
|---|
| 1924 | if ( pPool->cDirtyPages != RT_ELEMENTS(pPool->aDirtyPages)
|
|---|
| 1925 | && pPool->aidxDirtyPages[pPool->idxFreeDirtyPage] != NIL_PGMPOOL_IDX)
|
|---|
| 1926 | {
|
|---|
| 1927 | unsigned i;
|
|---|
| 1928 | for (i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 1929 | {
|
|---|
| 1930 | if (pPool->aidxDirtyPages[i] == NIL_PGMPOOL_IDX)
|
|---|
| 1931 | {
|
|---|
| 1932 | pPool->idxFreeDirtyPage = i;
|
|---|
| 1933 | break;
|
|---|
| 1934 | }
|
|---|
| 1935 | }
|
|---|
| 1936 | AssertMsg(i != RT_ELEMENTS(pPool->aDirtyPages), ("cDirtyPages %d", pPool->cDirtyPages));
|
|---|
| 1937 | }
|
|---|
| 1938 | }
|
|---|
| 1939 | }
|
|---|
| 1940 |
|
|---|
| 1941 | #endif /* PGMPOOL_WITH_OPTIMIZED_DIRTY_PT */
|
|---|
| 1942 |
|
|---|
| 1943 | /**
|
|---|
| 1944 | * Inserts a page into the GCPhys hash table.
|
|---|
| 1945 | *
|
|---|
| 1946 | * @param pPool The pool.
|
|---|
| 1947 | * @param pPage The page.
|
|---|
| 1948 | */
|
|---|
| 1949 | DECLINLINE(void) pgmPoolHashInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 1950 | {
|
|---|
| 1951 | Log3(("pgmPoolHashInsert: %RGp\n", pPage->GCPhys));
|
|---|
| 1952 | Assert(pPage->GCPhys != NIL_RTGCPHYS); Assert(pPage->iNext == NIL_PGMPOOL_IDX);
|
|---|
| 1953 | uint16_t iHash = PGMPOOL_HASH(pPage->GCPhys);
|
|---|
| 1954 | pPage->iNext = pPool->aiHash[iHash];
|
|---|
| 1955 | pPool->aiHash[iHash] = pPage->idx;
|
|---|
| 1956 | }
|
|---|
| 1957 |
|
|---|
| 1958 |
|
|---|
| 1959 | /**
|
|---|
| 1960 | * Removes a page from the GCPhys hash table.
|
|---|
| 1961 | *
|
|---|
| 1962 | * @param pPool The pool.
|
|---|
| 1963 | * @param pPage The page.
|
|---|
| 1964 | */
|
|---|
| 1965 | DECLINLINE(void) pgmPoolHashRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 1966 | {
|
|---|
| 1967 | Log3(("pgmPoolHashRemove: %RGp\n", pPage->GCPhys));
|
|---|
| 1968 | uint16_t iHash = PGMPOOL_HASH(pPage->GCPhys);
|
|---|
| 1969 | if (pPool->aiHash[iHash] == pPage->idx)
|
|---|
| 1970 | pPool->aiHash[iHash] = pPage->iNext;
|
|---|
| 1971 | else
|
|---|
| 1972 | {
|
|---|
| 1973 | uint16_t iPrev = pPool->aiHash[iHash];
|
|---|
| 1974 | for (;;)
|
|---|
| 1975 | {
|
|---|
| 1976 | const int16_t i = pPool->aPages[iPrev].iNext;
|
|---|
| 1977 | if (i == pPage->idx)
|
|---|
| 1978 | {
|
|---|
| 1979 | pPool->aPages[iPrev].iNext = pPage->iNext;
|
|---|
| 1980 | break;
|
|---|
| 1981 | }
|
|---|
| 1982 | if (i == NIL_PGMPOOL_IDX)
|
|---|
| 1983 | {
|
|---|
| 1984 | AssertReleaseMsgFailed(("GCPhys=%RGp idx=%d\n", pPage->GCPhys, pPage->idx));
|
|---|
| 1985 | break;
|
|---|
| 1986 | }
|
|---|
| 1987 | iPrev = i;
|
|---|
| 1988 | }
|
|---|
| 1989 | }
|
|---|
| 1990 | pPage->iNext = NIL_PGMPOOL_IDX;
|
|---|
| 1991 | }
|
|---|
| 1992 |
|
|---|
| 1993 |
|
|---|
| 1994 | /**
|
|---|
| 1995 | * Frees up one cache page.
|
|---|
| 1996 | *
|
|---|
| 1997 | * @returns VBox status code.
|
|---|
| 1998 | * @retval VINF_SUCCESS on success.
|
|---|
| 1999 | * @param pPool The pool.
|
|---|
| 2000 | * @param iUser The user index.
|
|---|
| 2001 | */
|
|---|
| 2002 | static int pgmPoolCacheFreeOne(PPGMPOOL pPool, uint16_t iUser)
|
|---|
| 2003 | {
|
|---|
| 2004 | const PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 2005 | Assert(pPool->iAgeHead != pPool->iAgeTail); /* We shouldn't be here if there < 2 cached entries! */
|
|---|
| 2006 | STAM_COUNTER_INC(&pPool->StatCacheFreeUpOne);
|
|---|
| 2007 |
|
|---|
| 2008 | /*
|
|---|
| 2009 | * Select one page from the tail of the age list.
|
|---|
| 2010 | */
|
|---|
| 2011 | PPGMPOOLPAGE pPage;
|
|---|
| 2012 | for (unsigned iLoop = 0; ; iLoop++)
|
|---|
| 2013 | {
|
|---|
| 2014 | uint16_t iToFree = pPool->iAgeTail;
|
|---|
| 2015 | if (iToFree == iUser && iUser != NIL_PGMPOOL_IDX)
|
|---|
| 2016 | iToFree = pPool->aPages[iToFree].iAgePrev;
|
|---|
| 2017 | /* This is the alternative to the SyncCR3 pgmPoolCacheUsed calls.
|
|---|
| 2018 | if (pPool->aPages[iToFree].iUserHead != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2019 | {
|
|---|
| 2020 | uint16_t i = pPool->aPages[iToFree].iAgePrev;
|
|---|
| 2021 | for (unsigned j = 0; j < 10 && i != NIL_PGMPOOL_USER_INDEX; j++, i = pPool->aPages[i].iAgePrev)
|
|---|
| 2022 | {
|
|---|
| 2023 | if (pPool->aPages[iToFree].iUserHead == NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2024 | continue;
|
|---|
| 2025 | iToFree = i;
|
|---|
| 2026 | break;
|
|---|
| 2027 | }
|
|---|
| 2028 | }
|
|---|
| 2029 | */
|
|---|
| 2030 | Assert(iToFree != iUser);
|
|---|
| 2031 | AssertReleaseMsg(iToFree != NIL_PGMPOOL_IDX,
|
|---|
| 2032 | ("iToFree=%#x (iAgeTail=%#x) iUser=%#x iLoop=%u - pPool=%p LB %#zx\n",
|
|---|
| 2033 | iToFree, pPool->iAgeTail, iUser, iLoop, pPool,
|
|---|
| 2034 | RT_UOFFSETOF_DYN(PGMPOOL, aPages[pPool->cMaxPages])
|
|---|
| 2035 | + pPool->cMaxUsers * sizeof(PGMPOOLUSER)
|
|---|
| 2036 | + pPool->cMaxPhysExts * sizeof(PGMPOOLPHYSEXT) ));
|
|---|
| 2037 |
|
|---|
| 2038 | pPage = &pPool->aPages[iToFree];
|
|---|
| 2039 |
|
|---|
| 2040 | /*
|
|---|
| 2041 | * Reject any attempts at flushing the currently active shadow CR3 mapping.
|
|---|
| 2042 | * Call pgmPoolCacheUsed to move the page to the head of the age list.
|
|---|
| 2043 | */
|
|---|
| 2044 | if ( !pgmPoolIsPageLocked(pPage)
|
|---|
| 2045 | && pPage->idx >= PGMPOOL_IDX_FIRST /* paranoia (#6349) */)
|
|---|
| 2046 | break;
|
|---|
| 2047 | LogFlow(("pgmPoolCacheFreeOne: refuse CR3 mapping\n"));
|
|---|
| 2048 | pgmPoolCacheUsed(pPool, pPage);
|
|---|
| 2049 | AssertLogRelReturn(iLoop < 8192, VERR_PGM_POOL_TOO_MANY_LOOPS);
|
|---|
| 2050 | }
|
|---|
| 2051 |
|
|---|
| 2052 | /*
|
|---|
| 2053 | * Found a usable page, flush it and return.
|
|---|
| 2054 | */
|
|---|
| 2055 | int rc = pgmPoolFlushPage(pPool, pPage);
|
|---|
| 2056 | /* This flush was initiated by us and not the guest, so explicitly flush the TLB. */
|
|---|
| 2057 | /** @todo find out why this is necessary; pgmPoolFlushPage should trigger a flush if one is really needed. */
|
|---|
| 2058 | if (rc == VINF_SUCCESS)
|
|---|
| 2059 | PGM_INVL_ALL_VCPU_TLBS(pVM);
|
|---|
| 2060 | return rc;
|
|---|
| 2061 | }
|
|---|
| 2062 |
|
|---|
| 2063 |
|
|---|
| 2064 | /**
|
|---|
| 2065 | * Checks if a kind mismatch is really a page being reused
|
|---|
| 2066 | * or if it's just normal remappings.
|
|---|
| 2067 | *
|
|---|
| 2068 | * @returns true if reused and the cached page (enmKind1) should be flushed
|
|---|
| 2069 | * @returns false if not reused.
|
|---|
| 2070 | * @param enmKind1 The kind of the cached page.
|
|---|
| 2071 | * @param enmKind2 The kind of the requested page.
|
|---|
| 2072 | */
|
|---|
| 2073 | static bool pgmPoolCacheReusedByKind(PGMPOOLKIND enmKind1, PGMPOOLKIND enmKind2)
|
|---|
| 2074 | {
|
|---|
| 2075 | switch (enmKind1)
|
|---|
| 2076 | {
|
|---|
| 2077 | /*
|
|---|
| 2078 | * Never reuse them. There is no remapping in non-paging mode.
|
|---|
| 2079 | */
|
|---|
| 2080 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2081 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 2082 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2083 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 2084 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 2085 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2086 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2087 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2088 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2089 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2090 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT: /* never reuse them for other types */
|
|---|
| 2091 | return false;
|
|---|
| 2092 |
|
|---|
| 2093 | /*
|
|---|
| 2094 | * It's perfectly fine to reuse these, except for PAE and non-paging stuff.
|
|---|
| 2095 | */
|
|---|
| 2096 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 2097 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 2098 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 2099 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 2100 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 2101 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 2102 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 2103 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 2104 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 2105 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 2106 | switch (enmKind2)
|
|---|
| 2107 | {
|
|---|
| 2108 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 2109 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 2110 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 2111 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 2112 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 2113 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 2114 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2115 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2116 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2117 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2118 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2119 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2120 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2121 | return true;
|
|---|
| 2122 | default:
|
|---|
| 2123 | return false;
|
|---|
| 2124 | }
|
|---|
| 2125 |
|
|---|
| 2126 | /*
|
|---|
| 2127 | * It's perfectly fine to reuse these, except for PAE and non-paging stuff.
|
|---|
| 2128 | */
|
|---|
| 2129 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 2130 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 2131 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 2132 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 2133 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 2134 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 2135 | switch (enmKind2)
|
|---|
| 2136 | {
|
|---|
| 2137 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 2138 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 2139 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 2140 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 2141 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 2142 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 2143 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 2144 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 2145 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2146 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2147 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2148 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2149 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2150 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2151 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2152 | return true;
|
|---|
| 2153 | default:
|
|---|
| 2154 | return false;
|
|---|
| 2155 | }
|
|---|
| 2156 |
|
|---|
| 2157 | /*
|
|---|
| 2158 | * These cannot be flushed, and it's common to reuse the PDs as PTs.
|
|---|
| 2159 | */
|
|---|
| 2160 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 2161 | return false;
|
|---|
| 2162 |
|
|---|
| 2163 | default:
|
|---|
| 2164 | AssertFatalMsgFailed(("enmKind1=%d\n", enmKind1));
|
|---|
| 2165 | }
|
|---|
| 2166 | }
|
|---|
| 2167 |
|
|---|
| 2168 |
|
|---|
| 2169 | /**
|
|---|
| 2170 | * Attempts to satisfy a pgmPoolAlloc request from the cache.
|
|---|
| 2171 | *
|
|---|
| 2172 | * @returns VBox status code.
|
|---|
| 2173 | * @retval VINF_PGM_CACHED_PAGE on success.
|
|---|
| 2174 | * @retval VERR_FILE_NOT_FOUND if not found.
|
|---|
| 2175 | * @param pPool The pool.
|
|---|
| 2176 | * @param GCPhys The GC physical address of the page we're gonna shadow.
|
|---|
| 2177 | * @param enmKind The kind of mapping.
|
|---|
| 2178 | * @param enmAccess Access type for the mapping (only relevant for big pages)
|
|---|
| 2179 | * @param fA20Enabled Whether the CPU has the A20 gate enabled.
|
|---|
| 2180 | * @param iUser The shadow page pool index of the user table. This is
|
|---|
| 2181 | * NIL_PGMPOOL_IDX for root pages.
|
|---|
| 2182 | * @param iUserTable The index into the user table (shadowed). Ignored if
|
|---|
| 2183 | * root page
|
|---|
| 2184 | * @param ppPage Where to store the pointer to the page.
|
|---|
| 2185 | */
|
|---|
| 2186 | static int pgmPoolCacheAlloc(PPGMPOOL pPool, RTGCPHYS GCPhys, PGMPOOLKIND enmKind, PGMPOOLACCESS enmAccess, bool fA20Enabled,
|
|---|
| 2187 | uint16_t iUser, uint32_t iUserTable, PPPGMPOOLPAGE ppPage)
|
|---|
| 2188 | {
|
|---|
| 2189 | /*
|
|---|
| 2190 | * Look up the GCPhys in the hash.
|
|---|
| 2191 | */
|
|---|
| 2192 | unsigned i = pPool->aiHash[PGMPOOL_HASH(GCPhys)];
|
|---|
| 2193 | Log3(("pgmPoolCacheAlloc: %RGp kind %s iUser=%d iUserTable=%x SLOT=%d\n", GCPhys, pgmPoolPoolKindToStr(enmKind), iUser, iUserTable, i));
|
|---|
| 2194 | if (i != NIL_PGMPOOL_IDX)
|
|---|
| 2195 | {
|
|---|
| 2196 | do
|
|---|
| 2197 | {
|
|---|
| 2198 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 2199 | Log4(("pgmPoolCacheAlloc: slot %d found page %RGp\n", i, pPage->GCPhys));
|
|---|
| 2200 | if (pPage->GCPhys == GCPhys)
|
|---|
| 2201 | {
|
|---|
| 2202 | if ( (PGMPOOLKIND)pPage->enmKind == enmKind
|
|---|
| 2203 | && (PGMPOOLACCESS)pPage->enmAccess == enmAccess
|
|---|
| 2204 | && pPage->fA20Enabled == fA20Enabled)
|
|---|
| 2205 | {
|
|---|
| 2206 | /* Put it at the start of the use list to make sure pgmPoolTrackAddUser
|
|---|
| 2207 | * doesn't flush it in case there are no more free use records.
|
|---|
| 2208 | */
|
|---|
| 2209 | pgmPoolCacheUsed(pPool, pPage);
|
|---|
| 2210 |
|
|---|
| 2211 | int rc = VINF_SUCCESS;
|
|---|
| 2212 | if (iUser != NIL_PGMPOOL_IDX)
|
|---|
| 2213 | rc = pgmPoolTrackAddUser(pPool, pPage, iUser, iUserTable);
|
|---|
| 2214 | if (RT_SUCCESS(rc))
|
|---|
| 2215 | {
|
|---|
| 2216 | Assert((PGMPOOLKIND)pPage->enmKind == enmKind);
|
|---|
| 2217 | *ppPage = pPage;
|
|---|
| 2218 | if (pPage->cModifications)
|
|---|
| 2219 | pPage->cModifications = 1; /* reset counter (can't use 0, or else it will be reinserted in the modified list) */
|
|---|
| 2220 | STAM_COUNTER_INC(&pPool->StatCacheHits);
|
|---|
| 2221 | return VINF_PGM_CACHED_PAGE;
|
|---|
| 2222 | }
|
|---|
| 2223 | return rc;
|
|---|
| 2224 | }
|
|---|
| 2225 |
|
|---|
| 2226 | if ((PGMPOOLKIND)pPage->enmKind != enmKind)
|
|---|
| 2227 | {
|
|---|
| 2228 | /*
|
|---|
| 2229 | * The kind is different. In some cases we should now flush the page
|
|---|
| 2230 | * as it has been reused, but in most cases this is normal remapping
|
|---|
| 2231 | * of PDs as PT or big pages using the GCPhys field in a slightly
|
|---|
| 2232 | * different way than the other kinds.
|
|---|
| 2233 | */
|
|---|
| 2234 | if (pgmPoolCacheReusedByKind((PGMPOOLKIND)pPage->enmKind, enmKind))
|
|---|
| 2235 | {
|
|---|
| 2236 | STAM_COUNTER_INC(&pPool->StatCacheKindMismatches);
|
|---|
| 2237 | pgmPoolFlushPage(pPool, pPage);
|
|---|
| 2238 | break;
|
|---|
| 2239 | }
|
|---|
| 2240 | }
|
|---|
| 2241 | }
|
|---|
| 2242 |
|
|---|
| 2243 | /* next */
|
|---|
| 2244 | i = pPage->iNext;
|
|---|
| 2245 | } while (i != NIL_PGMPOOL_IDX);
|
|---|
| 2246 | }
|
|---|
| 2247 |
|
|---|
| 2248 | Log3(("pgmPoolCacheAlloc: Missed GCPhys=%RGp enmKind=%s\n", GCPhys, pgmPoolPoolKindToStr(enmKind)));
|
|---|
| 2249 | STAM_COUNTER_INC(&pPool->StatCacheMisses);
|
|---|
| 2250 | return VERR_FILE_NOT_FOUND;
|
|---|
| 2251 | }
|
|---|
| 2252 |
|
|---|
| 2253 |
|
|---|
| 2254 | /**
|
|---|
| 2255 | * Inserts a page into the cache.
|
|---|
| 2256 | *
|
|---|
| 2257 | * @param pPool The pool.
|
|---|
| 2258 | * @param pPage The cached page.
|
|---|
| 2259 | * @param fCanBeCached Set if the page is fit for caching from the caller's point of view.
|
|---|
| 2260 | */
|
|---|
| 2261 | static void pgmPoolCacheInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage, bool fCanBeCached)
|
|---|
| 2262 | {
|
|---|
| 2263 | /*
|
|---|
| 2264 | * Insert into the GCPhys hash if the page is fit for that.
|
|---|
| 2265 | */
|
|---|
| 2266 | Assert(!pPage->fCached);
|
|---|
| 2267 | if (fCanBeCached)
|
|---|
| 2268 | {
|
|---|
| 2269 | pPage->fCached = true;
|
|---|
| 2270 | pgmPoolHashInsert(pPool, pPage);
|
|---|
| 2271 | Log3(("pgmPoolCacheInsert: Caching %p:{.Core=%RHp, .idx=%d, .enmKind=%s, GCPhys=%RGp}\n",
|
|---|
| 2272 | pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), pPage->GCPhys));
|
|---|
| 2273 | STAM_COUNTER_INC(&pPool->StatCacheCacheable);
|
|---|
| 2274 | }
|
|---|
| 2275 | else
|
|---|
| 2276 | {
|
|---|
| 2277 | Log3(("pgmPoolCacheInsert: Not caching %p:{.Core=%RHp, .idx=%d, .enmKind=%s, GCPhys=%RGp}\n",
|
|---|
| 2278 | pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), pPage->GCPhys));
|
|---|
| 2279 | STAM_COUNTER_INC(&pPool->StatCacheUncacheable);
|
|---|
| 2280 | }
|
|---|
| 2281 |
|
|---|
| 2282 | /*
|
|---|
| 2283 | * Insert at the head of the age list.
|
|---|
| 2284 | */
|
|---|
| 2285 | pPage->iAgePrev = NIL_PGMPOOL_IDX;
|
|---|
| 2286 | pPage->iAgeNext = pPool->iAgeHead;
|
|---|
| 2287 | if (pPool->iAgeHead != NIL_PGMPOOL_IDX)
|
|---|
| 2288 | pPool->aPages[pPool->iAgeHead].iAgePrev = pPage->idx;
|
|---|
| 2289 | else
|
|---|
| 2290 | pPool->iAgeTail = pPage->idx;
|
|---|
| 2291 | pPool->iAgeHead = pPage->idx;
|
|---|
| 2292 | }
|
|---|
| 2293 |
|
|---|
| 2294 |
|
|---|
| 2295 | /**
|
|---|
| 2296 | * Flushes a cached page.
|
|---|
| 2297 | *
|
|---|
| 2298 | * @param pPool The pool.
|
|---|
| 2299 | * @param pPage The cached page.
|
|---|
| 2300 | */
|
|---|
| 2301 | static void pgmPoolCacheFlushPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 2302 | {
|
|---|
| 2303 | Log3(("pgmPoolCacheFlushPage: %RGp\n", pPage->GCPhys));
|
|---|
| 2304 |
|
|---|
| 2305 | /*
|
|---|
| 2306 | * Remove the page from the hash.
|
|---|
| 2307 | */
|
|---|
| 2308 | if (pPage->fCached)
|
|---|
| 2309 | {
|
|---|
| 2310 | pPage->fCached = false;
|
|---|
| 2311 | pgmPoolHashRemove(pPool, pPage);
|
|---|
| 2312 | }
|
|---|
| 2313 | else
|
|---|
| 2314 | Assert(pPage->iNext == NIL_PGMPOOL_IDX);
|
|---|
| 2315 |
|
|---|
| 2316 | /*
|
|---|
| 2317 | * Remove it from the age list.
|
|---|
| 2318 | */
|
|---|
| 2319 | if (pPage->iAgeNext != NIL_PGMPOOL_IDX)
|
|---|
| 2320 | pPool->aPages[pPage->iAgeNext].iAgePrev = pPage->iAgePrev;
|
|---|
| 2321 | else
|
|---|
| 2322 | pPool->iAgeTail = pPage->iAgePrev;
|
|---|
| 2323 | if (pPage->iAgePrev != NIL_PGMPOOL_IDX)
|
|---|
| 2324 | pPool->aPages[pPage->iAgePrev].iAgeNext = pPage->iAgeNext;
|
|---|
| 2325 | else
|
|---|
| 2326 | pPool->iAgeHead = pPage->iAgeNext;
|
|---|
| 2327 | pPage->iAgeNext = NIL_PGMPOOL_IDX;
|
|---|
| 2328 | pPage->iAgePrev = NIL_PGMPOOL_IDX;
|
|---|
| 2329 | }
|
|---|
| 2330 |
|
|---|
| 2331 |
|
|---|
| 2332 | /**
|
|---|
| 2333 | * Looks for pages sharing the monitor.
|
|---|
| 2334 | *
|
|---|
| 2335 | * @returns Pointer to the head page.
|
|---|
| 2336 | * @returns NULL if not found.
|
|---|
| 2337 | * @param pPool The Pool
|
|---|
| 2338 | * @param pNewPage The page which is going to be monitored.
|
|---|
| 2339 | */
|
|---|
| 2340 | static PPGMPOOLPAGE pgmPoolMonitorGetPageByGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pNewPage)
|
|---|
| 2341 | {
|
|---|
| 2342 | /*
|
|---|
| 2343 | * Look up the GCPhys in the hash.
|
|---|
| 2344 | */
|
|---|
| 2345 | RTGCPHYS GCPhys = pNewPage->GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
|
|---|
| 2346 | unsigned i = pPool->aiHash[PGMPOOL_HASH(GCPhys)];
|
|---|
| 2347 | if (i == NIL_PGMPOOL_IDX)
|
|---|
| 2348 | return NULL;
|
|---|
| 2349 | do
|
|---|
| 2350 | {
|
|---|
| 2351 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 2352 | if ( pPage->GCPhys - GCPhys < PAGE_SIZE
|
|---|
| 2353 | && pPage != pNewPage)
|
|---|
| 2354 | {
|
|---|
| 2355 | switch (pPage->enmKind)
|
|---|
| 2356 | {
|
|---|
| 2357 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 2358 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 2359 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 2360 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 2361 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 2362 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 2363 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 2364 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 2365 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 2366 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 2367 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 2368 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 2369 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 2370 | {
|
|---|
| 2371 | /* find the head */
|
|---|
| 2372 | while (pPage->iMonitoredPrev != NIL_PGMPOOL_IDX)
|
|---|
| 2373 | {
|
|---|
| 2374 | Assert(pPage->iMonitoredPrev != pPage->idx);
|
|---|
| 2375 | pPage = &pPool->aPages[pPage->iMonitoredPrev];
|
|---|
| 2376 | }
|
|---|
| 2377 | return pPage;
|
|---|
| 2378 | }
|
|---|
| 2379 |
|
|---|
| 2380 | /* ignore, no monitoring. */
|
|---|
| 2381 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 2382 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 2383 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 2384 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2385 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2386 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2387 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2388 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2389 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2390 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2391 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 2392 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 2393 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 2394 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 2395 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 2396 | break;
|
|---|
| 2397 | default:
|
|---|
| 2398 | AssertFatalMsgFailed(("enmKind=%d idx=%d\n", pPage->enmKind, pPage->idx));
|
|---|
| 2399 | }
|
|---|
| 2400 | }
|
|---|
| 2401 |
|
|---|
| 2402 | /* next */
|
|---|
| 2403 | i = pPage->iNext;
|
|---|
| 2404 | } while (i != NIL_PGMPOOL_IDX);
|
|---|
| 2405 | return NULL;
|
|---|
| 2406 | }
|
|---|
| 2407 |
|
|---|
| 2408 |
|
|---|
| 2409 | /**
|
|---|
| 2410 | * Enabled write monitoring of a guest page.
|
|---|
| 2411 | *
|
|---|
| 2412 | * @returns VBox status code.
|
|---|
| 2413 | * @retval VINF_SUCCESS on success.
|
|---|
| 2414 | * @param pPool The pool.
|
|---|
| 2415 | * @param pPage The cached page.
|
|---|
| 2416 | */
|
|---|
| 2417 | static int pgmPoolMonitorInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 2418 | {
|
|---|
| 2419 | LogFlow(("pgmPoolMonitorInsert %RGp\n", pPage->GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK));
|
|---|
| 2420 |
|
|---|
| 2421 | /*
|
|---|
| 2422 | * Filter out the relevant kinds.
|
|---|
| 2423 | */
|
|---|
| 2424 | switch (pPage->enmKind)
|
|---|
| 2425 | {
|
|---|
| 2426 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 2427 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 2428 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 2429 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 2430 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 2431 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 2432 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 2433 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 2434 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 2435 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 2436 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 2437 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 2438 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 2439 | break;
|
|---|
| 2440 |
|
|---|
| 2441 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 2442 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 2443 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 2444 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2445 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2446 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2447 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2448 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2449 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2450 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2451 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 2452 | /* Nothing to monitor here. */
|
|---|
| 2453 | return VINF_SUCCESS;
|
|---|
| 2454 |
|
|---|
| 2455 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 2456 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 2457 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 2458 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 2459 | /* Nothing to monitor here. */
|
|---|
| 2460 | return VINF_SUCCESS;
|
|---|
| 2461 | default:
|
|---|
| 2462 | AssertFatalMsgFailed(("This can't happen! enmKind=%d\n", pPage->enmKind));
|
|---|
| 2463 | }
|
|---|
| 2464 |
|
|---|
| 2465 | /*
|
|---|
| 2466 | * Install handler.
|
|---|
| 2467 | */
|
|---|
| 2468 | int rc;
|
|---|
| 2469 | PPGMPOOLPAGE pPageHead = pgmPoolMonitorGetPageByGCPhys(pPool, pPage);
|
|---|
| 2470 | if (pPageHead)
|
|---|
| 2471 | {
|
|---|
| 2472 | Assert(pPageHead != pPage); Assert(pPageHead->iMonitoredNext != pPage->idx);
|
|---|
| 2473 | Assert(pPageHead->iMonitoredPrev != pPage->idx);
|
|---|
| 2474 |
|
|---|
| 2475 | #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 2476 | if (pPageHead->fDirty)
|
|---|
| 2477 | pgmPoolFlushDirtyPage(pPool->CTX_SUFF(pVM), pPool, pPageHead->idxDirtyEntry, false /* do not remove */);
|
|---|
| 2478 | #endif
|
|---|
| 2479 |
|
|---|
| 2480 | pPage->iMonitoredPrev = pPageHead->idx;
|
|---|
| 2481 | pPage->iMonitoredNext = pPageHead->iMonitoredNext;
|
|---|
| 2482 | if (pPageHead->iMonitoredNext != NIL_PGMPOOL_IDX)
|
|---|
| 2483 | pPool->aPages[pPageHead->iMonitoredNext].iMonitoredPrev = pPage->idx;
|
|---|
| 2484 | pPageHead->iMonitoredNext = pPage->idx;
|
|---|
| 2485 | rc = VINF_SUCCESS;
|
|---|
| 2486 | }
|
|---|
| 2487 | else
|
|---|
| 2488 | {
|
|---|
| 2489 | Assert(pPage->iMonitoredNext == NIL_PGMPOOL_IDX); Assert(pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
|
|---|
| 2490 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 2491 | const RTGCPHYS GCPhysPage = pPage->GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
|
|---|
| 2492 | rc = PGMHandlerPhysicalRegister(pVM, GCPhysPage, GCPhysPage + PAGE_OFFSET_MASK, pPool->hAccessHandlerType,
|
|---|
| 2493 | pPage - &pPool->aPages[0], NIL_RTR3PTR /*pszDesc*/);
|
|---|
| 2494 | /** @todo we should probably deal with out-of-memory conditions here, but for now increasing
|
|---|
| 2495 | * the heap size should suffice. */
|
|---|
| 2496 | AssertFatalMsgRC(rc, ("PGMHandlerPhysicalRegisterEx %RGp failed with %Rrc\n", GCPhysPage, rc));
|
|---|
| 2497 | PVMCPU pVCpu = VMMGetCpu(pVM);
|
|---|
| 2498 | AssertFatalMsg(!(pVCpu->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL) || VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3), ("fSyncFlags=%x syncff=%d\n", pVCpu->pgm.s.fSyncFlags, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3)));
|
|---|
| 2499 | }
|
|---|
| 2500 | pPage->fMonitored = true;
|
|---|
| 2501 | return rc;
|
|---|
| 2502 | }
|
|---|
| 2503 |
|
|---|
| 2504 |
|
|---|
| 2505 | /**
|
|---|
| 2506 | * Disables write monitoring of a guest page.
|
|---|
| 2507 | *
|
|---|
| 2508 | * @returns VBox status code.
|
|---|
| 2509 | * @retval VINF_SUCCESS on success.
|
|---|
| 2510 | * @param pPool The pool.
|
|---|
| 2511 | * @param pPage The cached page.
|
|---|
| 2512 | */
|
|---|
| 2513 | static int pgmPoolMonitorFlush(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 2514 | {
|
|---|
| 2515 | /*
|
|---|
| 2516 | * Filter out the relevant kinds.
|
|---|
| 2517 | */
|
|---|
| 2518 | switch (pPage->enmKind)
|
|---|
| 2519 | {
|
|---|
| 2520 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 2521 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 2522 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 2523 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 2524 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 2525 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 2526 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 2527 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 2528 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 2529 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 2530 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 2531 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 2532 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 2533 | break;
|
|---|
| 2534 |
|
|---|
| 2535 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 2536 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 2537 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 2538 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 2539 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 2540 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 2541 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 2542 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 2543 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 2544 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 2545 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 2546 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 2547 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 2548 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 2549 | /* Nothing to monitor here. */
|
|---|
| 2550 | Assert(!pPage->fMonitored);
|
|---|
| 2551 | return VINF_SUCCESS;
|
|---|
| 2552 |
|
|---|
| 2553 | default:
|
|---|
| 2554 | AssertFatalMsgFailed(("This can't happen! enmKind=%d\n", pPage->enmKind));
|
|---|
| 2555 | }
|
|---|
| 2556 | Assert(pPage->fMonitored);
|
|---|
| 2557 |
|
|---|
| 2558 | /*
|
|---|
| 2559 | * Remove the page from the monitored list or uninstall it if last.
|
|---|
| 2560 | */
|
|---|
| 2561 | const PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 2562 | int rc;
|
|---|
| 2563 | if ( pPage->iMonitoredNext != NIL_PGMPOOL_IDX
|
|---|
| 2564 | || pPage->iMonitoredPrev != NIL_PGMPOOL_IDX)
|
|---|
| 2565 | {
|
|---|
| 2566 | if (pPage->iMonitoredPrev == NIL_PGMPOOL_IDX)
|
|---|
| 2567 | {
|
|---|
| 2568 | PPGMPOOLPAGE pNewHead = &pPool->aPages[pPage->iMonitoredNext];
|
|---|
| 2569 | pNewHead->iMonitoredPrev = NIL_PGMPOOL_IDX;
|
|---|
| 2570 | rc = PGMHandlerPhysicalChangeUserArg(pVM, pPage->GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK, pPage->iMonitoredNext);
|
|---|
| 2571 |
|
|---|
| 2572 | AssertFatalRCSuccess(rc);
|
|---|
| 2573 | pPage->iMonitoredNext = NIL_PGMPOOL_IDX;
|
|---|
| 2574 | }
|
|---|
| 2575 | else
|
|---|
| 2576 | {
|
|---|
| 2577 | pPool->aPages[pPage->iMonitoredPrev].iMonitoredNext = pPage->iMonitoredNext;
|
|---|
| 2578 | if (pPage->iMonitoredNext != NIL_PGMPOOL_IDX)
|
|---|
| 2579 | {
|
|---|
| 2580 | pPool->aPages[pPage->iMonitoredNext].iMonitoredPrev = pPage->iMonitoredPrev;
|
|---|
| 2581 | pPage->iMonitoredNext = NIL_PGMPOOL_IDX;
|
|---|
| 2582 | }
|
|---|
| 2583 | pPage->iMonitoredPrev = NIL_PGMPOOL_IDX;
|
|---|
| 2584 | rc = VINF_SUCCESS;
|
|---|
| 2585 | }
|
|---|
| 2586 | }
|
|---|
| 2587 | else
|
|---|
| 2588 | {
|
|---|
| 2589 | rc = PGMHandlerPhysicalDeregister(pVM, pPage->GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK);
|
|---|
| 2590 | AssertFatalRC(rc);
|
|---|
| 2591 | PVMCPU pVCpu = VMMGetCpu(pVM);
|
|---|
| 2592 | AssertFatalMsg(!(pVCpu->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL) || VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3),
|
|---|
| 2593 | ("%#x %#x\n", pVCpu->pgm.s.fSyncFlags, pVM->fGlobalForcedActions));
|
|---|
| 2594 | }
|
|---|
| 2595 | pPage->fMonitored = false;
|
|---|
| 2596 |
|
|---|
| 2597 | /*
|
|---|
| 2598 | * Remove it from the list of modified pages (if in it).
|
|---|
| 2599 | */
|
|---|
| 2600 | pgmPoolMonitorModifiedRemove(pPool, pPage);
|
|---|
| 2601 |
|
|---|
| 2602 | return rc;
|
|---|
| 2603 | }
|
|---|
| 2604 |
|
|---|
| 2605 |
|
|---|
| 2606 | /**
|
|---|
| 2607 | * Inserts the page into the list of modified pages.
|
|---|
| 2608 | *
|
|---|
| 2609 | * @param pPool The pool.
|
|---|
| 2610 | * @param pPage The page.
|
|---|
| 2611 | */
|
|---|
| 2612 | void pgmPoolMonitorModifiedInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 2613 | {
|
|---|
| 2614 | Log3(("pgmPoolMonitorModifiedInsert: idx=%d\n", pPage->idx));
|
|---|
| 2615 | AssertMsg( pPage->iModifiedNext == NIL_PGMPOOL_IDX
|
|---|
| 2616 | && pPage->iModifiedPrev == NIL_PGMPOOL_IDX
|
|---|
| 2617 | && pPool->iModifiedHead != pPage->idx,
|
|---|
| 2618 | ("Next=%d Prev=%d idx=%d cModifications=%d Head=%d cModifiedPages=%d\n",
|
|---|
| 2619 | pPage->iModifiedNext, pPage->iModifiedPrev, pPage->idx, pPage->cModifications,
|
|---|
| 2620 | pPool->iModifiedHead, pPool->cModifiedPages));
|
|---|
| 2621 |
|
|---|
| 2622 | pPage->iModifiedNext = pPool->iModifiedHead;
|
|---|
| 2623 | if (pPool->iModifiedHead != NIL_PGMPOOL_IDX)
|
|---|
| 2624 | pPool->aPages[pPool->iModifiedHead].iModifiedPrev = pPage->idx;
|
|---|
| 2625 | pPool->iModifiedHead = pPage->idx;
|
|---|
| 2626 | pPool->cModifiedPages++;
|
|---|
| 2627 | #ifdef VBOX_WITH_STATISTICS
|
|---|
| 2628 | if (pPool->cModifiedPages > pPool->cModifiedPagesHigh)
|
|---|
| 2629 | pPool->cModifiedPagesHigh = pPool->cModifiedPages;
|
|---|
| 2630 | #endif
|
|---|
| 2631 | }
|
|---|
| 2632 |
|
|---|
| 2633 |
|
|---|
| 2634 | /**
|
|---|
| 2635 | * Removes the page from the list of modified pages and resets the
|
|---|
| 2636 | * modification counter.
|
|---|
| 2637 | *
|
|---|
| 2638 | * @param pPool The pool.
|
|---|
| 2639 | * @param pPage The page which is believed to be in the list of modified pages.
|
|---|
| 2640 | */
|
|---|
| 2641 | static void pgmPoolMonitorModifiedRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 2642 | {
|
|---|
| 2643 | Log3(("pgmPoolMonitorModifiedRemove: idx=%d cModifications=%d\n", pPage->idx, pPage->cModifications));
|
|---|
| 2644 | if (pPool->iModifiedHead == pPage->idx)
|
|---|
| 2645 | {
|
|---|
| 2646 | Assert(pPage->iModifiedPrev == NIL_PGMPOOL_IDX);
|
|---|
| 2647 | pPool->iModifiedHead = pPage->iModifiedNext;
|
|---|
| 2648 | if (pPage->iModifiedNext != NIL_PGMPOOL_IDX)
|
|---|
| 2649 | {
|
|---|
| 2650 | pPool->aPages[pPage->iModifiedNext].iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 2651 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 2652 | }
|
|---|
| 2653 | pPool->cModifiedPages--;
|
|---|
| 2654 | }
|
|---|
| 2655 | else if (pPage->iModifiedPrev != NIL_PGMPOOL_IDX)
|
|---|
| 2656 | {
|
|---|
| 2657 | pPool->aPages[pPage->iModifiedPrev].iModifiedNext = pPage->iModifiedNext;
|
|---|
| 2658 | if (pPage->iModifiedNext != NIL_PGMPOOL_IDX)
|
|---|
| 2659 | {
|
|---|
| 2660 | pPool->aPages[pPage->iModifiedNext].iModifiedPrev = pPage->iModifiedPrev;
|
|---|
| 2661 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 2662 | }
|
|---|
| 2663 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 2664 | pPool->cModifiedPages--;
|
|---|
| 2665 | }
|
|---|
| 2666 | else
|
|---|
| 2667 | Assert(pPage->iModifiedPrev == NIL_PGMPOOL_IDX);
|
|---|
| 2668 | pPage->cModifications = 0;
|
|---|
| 2669 | }
|
|---|
| 2670 |
|
|---|
| 2671 |
|
|---|
| 2672 | /**
|
|---|
| 2673 | * Zaps the list of modified pages, resetting their modification counters in the process.
|
|---|
| 2674 | *
|
|---|
| 2675 | * @param pVM The cross context VM structure.
|
|---|
| 2676 | */
|
|---|
| 2677 | static void pgmPoolMonitorModifiedClearAll(PVMCC pVM)
|
|---|
| 2678 | {
|
|---|
| 2679 | PGM_LOCK_VOID(pVM);
|
|---|
| 2680 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 2681 | LogFlow(("pgmPoolMonitorModifiedClearAll: cModifiedPages=%d\n", pPool->cModifiedPages));
|
|---|
| 2682 |
|
|---|
| 2683 | unsigned cPages = 0; NOREF(cPages);
|
|---|
| 2684 |
|
|---|
| 2685 | #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 2686 | pgmPoolResetDirtyPages(pVM);
|
|---|
| 2687 | #endif
|
|---|
| 2688 |
|
|---|
| 2689 | uint16_t idx = pPool->iModifiedHead;
|
|---|
| 2690 | pPool->iModifiedHead = NIL_PGMPOOL_IDX;
|
|---|
| 2691 | while (idx != NIL_PGMPOOL_IDX)
|
|---|
| 2692 | {
|
|---|
| 2693 | PPGMPOOLPAGE pPage = &pPool->aPages[idx];
|
|---|
| 2694 | idx = pPage->iModifiedNext;
|
|---|
| 2695 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 2696 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 2697 | pPage->cModifications = 0;
|
|---|
| 2698 | Assert(++cPages);
|
|---|
| 2699 | }
|
|---|
| 2700 | AssertMsg(cPages == pPool->cModifiedPages, ("%d != %d\n", cPages, pPool->cModifiedPages));
|
|---|
| 2701 | pPool->cModifiedPages = 0;
|
|---|
| 2702 | PGM_UNLOCK(pVM);
|
|---|
| 2703 | }
|
|---|
| 2704 |
|
|---|
| 2705 |
|
|---|
| 2706 | /**
|
|---|
| 2707 | * Handle SyncCR3 pool tasks
|
|---|
| 2708 | *
|
|---|
| 2709 | * @returns VBox status code.
|
|---|
| 2710 | * @retval VINF_SUCCESS if successfully added.
|
|---|
| 2711 | * @retval VINF_PGM_SYNC_CR3 is it needs to be deferred to ring 3 (GC only)
|
|---|
| 2712 | * @param pVCpu The cross context virtual CPU structure.
|
|---|
| 2713 | * @remark Should only be used when monitoring is available, thus placed in
|
|---|
| 2714 | * the PGMPOOL_WITH_MONITORING \#ifdef.
|
|---|
| 2715 | */
|
|---|
| 2716 | int pgmPoolSyncCR3(PVMCPUCC pVCpu)
|
|---|
| 2717 | {
|
|---|
| 2718 | PVMCC pVM = pVCpu->CTX_SUFF(pVM);
|
|---|
| 2719 | LogFlow(("pgmPoolSyncCR3 fSyncFlags=%x\n", pVCpu->pgm.s.fSyncFlags));
|
|---|
| 2720 |
|
|---|
| 2721 | /*
|
|---|
| 2722 | * When monitoring shadowed pages, we reset the modification counters on CR3 sync.
|
|---|
| 2723 | * Occasionally we will have to clear all the shadow page tables because we wanted
|
|---|
| 2724 | * to monitor a page which was mapped by too many shadowed page tables. This operation
|
|---|
| 2725 | * sometimes referred to as a 'lightweight flush'.
|
|---|
| 2726 | */
|
|---|
| 2727 | # ifdef IN_RING3 /* Don't flush in ring-0 or raw mode, it's taking too long. */
|
|---|
| 2728 | if (pVCpu->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL)
|
|---|
| 2729 | pgmR3PoolClearAll(pVM, false /*fFlushRemTlb*/);
|
|---|
| 2730 | # else /* !IN_RING3 */
|
|---|
| 2731 | if (pVCpu->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL)
|
|---|
| 2732 | {
|
|---|
| 2733 | Log(("SyncCR3: PGM_SYNC_CLEAR_PGM_POOL is set -> VINF_PGM_SYNC_CR3\n"));
|
|---|
| 2734 | VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3); /** @todo no need to do global sync, right? */
|
|---|
| 2735 |
|
|---|
| 2736 | /* Make sure all other VCPUs return to ring 3. */
|
|---|
| 2737 | if (pVM->cCpus > 1)
|
|---|
| 2738 | {
|
|---|
| 2739 | VM_FF_SET(pVM, VM_FF_PGM_POOL_FLUSH_PENDING);
|
|---|
| 2740 | PGM_INVL_ALL_VCPU_TLBS(pVM);
|
|---|
| 2741 | }
|
|---|
| 2742 | return VINF_PGM_SYNC_CR3;
|
|---|
| 2743 | }
|
|---|
| 2744 | # endif /* !IN_RING3 */
|
|---|
| 2745 | else
|
|---|
| 2746 | {
|
|---|
| 2747 | pgmPoolMonitorModifiedClearAll(pVM);
|
|---|
| 2748 |
|
|---|
| 2749 | /* pgmPoolMonitorModifiedClearAll can cause a pgm pool flush (dirty page clearing), so make sure we handle this! */
|
|---|
| 2750 | if (pVCpu->pgm.s.fSyncFlags & PGM_SYNC_CLEAR_PGM_POOL)
|
|---|
| 2751 | {
|
|---|
| 2752 | Log(("pgmPoolMonitorModifiedClearAll caused a pgm flush -> call pgmPoolSyncCR3 again!\n"));
|
|---|
| 2753 | return pgmPoolSyncCR3(pVCpu);
|
|---|
| 2754 | }
|
|---|
| 2755 | }
|
|---|
| 2756 | return VINF_SUCCESS;
|
|---|
| 2757 | }
|
|---|
| 2758 |
|
|---|
| 2759 |
|
|---|
| 2760 | /**
|
|---|
| 2761 | * Frees up at least one user entry.
|
|---|
| 2762 | *
|
|---|
| 2763 | * @returns VBox status code.
|
|---|
| 2764 | * @retval VINF_SUCCESS if successfully added.
|
|---|
| 2765 | *
|
|---|
| 2766 | * @param pPool The pool.
|
|---|
| 2767 | * @param iUser The user index.
|
|---|
| 2768 | */
|
|---|
| 2769 | static int pgmPoolTrackFreeOneUser(PPGMPOOL pPool, uint16_t iUser)
|
|---|
| 2770 | {
|
|---|
| 2771 | STAM_COUNTER_INC(&pPool->StatTrackFreeUpOneUser);
|
|---|
| 2772 | /*
|
|---|
| 2773 | * Just free cached pages in a braindead fashion.
|
|---|
| 2774 | */
|
|---|
| 2775 | /** @todo walk the age list backwards and free the first with usage. */
|
|---|
| 2776 | int rc = VINF_SUCCESS;
|
|---|
| 2777 | do
|
|---|
| 2778 | {
|
|---|
| 2779 | int rc2 = pgmPoolCacheFreeOne(pPool, iUser);
|
|---|
| 2780 | if (RT_FAILURE(rc2) && rc == VINF_SUCCESS)
|
|---|
| 2781 | rc = rc2;
|
|---|
| 2782 | } while (pPool->iUserFreeHead == NIL_PGMPOOL_USER_INDEX);
|
|---|
| 2783 | return rc;
|
|---|
| 2784 | }
|
|---|
| 2785 |
|
|---|
| 2786 |
|
|---|
| 2787 | /**
|
|---|
| 2788 | * Inserts a page into the cache.
|
|---|
| 2789 | *
|
|---|
| 2790 | * This will create user node for the page, insert it into the GCPhys
|
|---|
| 2791 | * hash, and insert it into the age list.
|
|---|
| 2792 | *
|
|---|
| 2793 | * @returns VBox status code.
|
|---|
| 2794 | * @retval VINF_SUCCESS if successfully added.
|
|---|
| 2795 | *
|
|---|
| 2796 | * @param pPool The pool.
|
|---|
| 2797 | * @param pPage The cached page.
|
|---|
| 2798 | * @param GCPhys The GC physical address of the page we're gonna shadow.
|
|---|
| 2799 | * @param iUser The user index.
|
|---|
| 2800 | * @param iUserTable The user table index.
|
|---|
| 2801 | */
|
|---|
| 2802 | DECLINLINE(int) pgmPoolTrackInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTGCPHYS GCPhys, uint16_t iUser, uint32_t iUserTable)
|
|---|
| 2803 | {
|
|---|
| 2804 | int rc = VINF_SUCCESS;
|
|---|
| 2805 | PPGMPOOLUSER paUsers = pPool->CTX_SUFF(paUsers);
|
|---|
| 2806 |
|
|---|
| 2807 | LogFlow(("pgmPoolTrackInsert GCPhys=%RGp iUser=%d iUserTable=%x\n", GCPhys, iUser, iUserTable)); RT_NOREF_PV(GCPhys);
|
|---|
| 2808 |
|
|---|
| 2809 | if (iUser != NIL_PGMPOOL_IDX)
|
|---|
| 2810 | {
|
|---|
| 2811 | #ifdef VBOX_STRICT
|
|---|
| 2812 | /*
|
|---|
| 2813 | * Check that the entry doesn't already exists.
|
|---|
| 2814 | */
|
|---|
| 2815 | if (pPage->iUserHead != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2816 | {
|
|---|
| 2817 | uint16_t i = pPage->iUserHead;
|
|---|
| 2818 | do
|
|---|
| 2819 | {
|
|---|
| 2820 | Assert(i < pPool->cMaxUsers);
|
|---|
| 2821 | AssertMsg(paUsers[i].iUser != iUser || paUsers[i].iUserTable != iUserTable, ("%x %x vs new %x %x\n", paUsers[i].iUser, paUsers[i].iUserTable, iUser, iUserTable));
|
|---|
| 2822 | i = paUsers[i].iNext;
|
|---|
| 2823 | } while (i != NIL_PGMPOOL_USER_INDEX);
|
|---|
| 2824 | }
|
|---|
| 2825 | #endif
|
|---|
| 2826 |
|
|---|
| 2827 | /*
|
|---|
| 2828 | * Find free a user node.
|
|---|
| 2829 | */
|
|---|
| 2830 | uint16_t i = pPool->iUserFreeHead;
|
|---|
| 2831 | if (i == NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2832 | {
|
|---|
| 2833 | rc = pgmPoolTrackFreeOneUser(pPool, iUser);
|
|---|
| 2834 | if (RT_FAILURE(rc))
|
|---|
| 2835 | return rc;
|
|---|
| 2836 | i = pPool->iUserFreeHead;
|
|---|
| 2837 | }
|
|---|
| 2838 |
|
|---|
| 2839 | /*
|
|---|
| 2840 | * Unlink the user node from the free list,
|
|---|
| 2841 | * initialize and insert it into the user list.
|
|---|
| 2842 | */
|
|---|
| 2843 | pPool->iUserFreeHead = paUsers[i].iNext;
|
|---|
| 2844 | paUsers[i].iNext = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 2845 | paUsers[i].iUser = iUser;
|
|---|
| 2846 | paUsers[i].iUserTable = iUserTable;
|
|---|
| 2847 | pPage->iUserHead = i;
|
|---|
| 2848 | }
|
|---|
| 2849 | else
|
|---|
| 2850 | pPage->iUserHead = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 2851 |
|
|---|
| 2852 |
|
|---|
| 2853 | /*
|
|---|
| 2854 | * Insert into cache and enable monitoring of the guest page if enabled.
|
|---|
| 2855 | *
|
|---|
| 2856 | * Until we implement caching of all levels, including the CR3 one, we'll
|
|---|
| 2857 | * have to make sure we don't try monitor & cache any recursive reuse of
|
|---|
| 2858 | * a monitored CR3 page. Because all windows versions are doing this we'll
|
|---|
| 2859 | * have to be able to do combined access monitoring, CR3 + PT and
|
|---|
| 2860 | * PD + PT (guest PAE).
|
|---|
| 2861 | *
|
|---|
| 2862 | * Update:
|
|---|
| 2863 | * We're now cooperating with the CR3 monitor if an uncachable page is found.
|
|---|
| 2864 | */
|
|---|
| 2865 | const bool fCanBeMonitored = true;
|
|---|
| 2866 | pgmPoolCacheInsert(pPool, pPage, fCanBeMonitored); /* This can be expanded. */
|
|---|
| 2867 | if (fCanBeMonitored)
|
|---|
| 2868 | {
|
|---|
| 2869 | rc = pgmPoolMonitorInsert(pPool, pPage);
|
|---|
| 2870 | AssertRC(rc);
|
|---|
| 2871 | }
|
|---|
| 2872 | return rc;
|
|---|
| 2873 | }
|
|---|
| 2874 |
|
|---|
| 2875 |
|
|---|
| 2876 | /**
|
|---|
| 2877 | * Adds a user reference to a page.
|
|---|
| 2878 | *
|
|---|
| 2879 | * This will move the page to the head of the
|
|---|
| 2880 | *
|
|---|
| 2881 | * @returns VBox status code.
|
|---|
| 2882 | * @retval VINF_SUCCESS if successfully added.
|
|---|
| 2883 | *
|
|---|
| 2884 | * @param pPool The pool.
|
|---|
| 2885 | * @param pPage The cached page.
|
|---|
| 2886 | * @param iUser The user index.
|
|---|
| 2887 | * @param iUserTable The user table.
|
|---|
| 2888 | */
|
|---|
| 2889 | static int pgmPoolTrackAddUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable)
|
|---|
| 2890 | {
|
|---|
| 2891 | Log3(("pgmPoolTrackAddUser: GCPhys=%RGp iUser=%x iUserTable=%x\n", pPage->GCPhys, iUser, iUserTable));
|
|---|
| 2892 | PPGMPOOLUSER paUsers = pPool->CTX_SUFF(paUsers);
|
|---|
| 2893 | Assert(iUser != NIL_PGMPOOL_IDX);
|
|---|
| 2894 |
|
|---|
| 2895 | # ifdef VBOX_STRICT
|
|---|
| 2896 | /*
|
|---|
| 2897 | * Check that the entry doesn't already exists. We only allow multiple
|
|---|
| 2898 | * users of top-level paging structures (SHW_POOL_ROOT_IDX).
|
|---|
| 2899 | */
|
|---|
| 2900 | if (pPage->iUserHead != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2901 | {
|
|---|
| 2902 | uint16_t i = pPage->iUserHead;
|
|---|
| 2903 | do
|
|---|
| 2904 | {
|
|---|
| 2905 | Assert(i < pPool->cMaxUsers);
|
|---|
| 2906 | /** @todo this assertion looks odd... Shouldn't it be && here? */
|
|---|
| 2907 | AssertMsg(paUsers[i].iUser != iUser || paUsers[i].iUserTable != iUserTable, ("%x %x vs new %x %x\n", paUsers[i].iUser, paUsers[i].iUserTable, iUser, iUserTable));
|
|---|
| 2908 | i = paUsers[i].iNext;
|
|---|
| 2909 | } while (i != NIL_PGMPOOL_USER_INDEX);
|
|---|
| 2910 | }
|
|---|
| 2911 | # endif
|
|---|
| 2912 |
|
|---|
| 2913 | /*
|
|---|
| 2914 | * Allocate a user node.
|
|---|
| 2915 | */
|
|---|
| 2916 | uint16_t i = pPool->iUserFreeHead;
|
|---|
| 2917 | if (i == NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2918 | {
|
|---|
| 2919 | int rc = pgmPoolTrackFreeOneUser(pPool, iUser);
|
|---|
| 2920 | if (RT_FAILURE(rc))
|
|---|
| 2921 | return rc;
|
|---|
| 2922 | i = pPool->iUserFreeHead;
|
|---|
| 2923 | }
|
|---|
| 2924 | pPool->iUserFreeHead = paUsers[i].iNext;
|
|---|
| 2925 |
|
|---|
| 2926 | /*
|
|---|
| 2927 | * Initialize the user node and insert it.
|
|---|
| 2928 | */
|
|---|
| 2929 | paUsers[i].iNext = pPage->iUserHead;
|
|---|
| 2930 | paUsers[i].iUser = iUser;
|
|---|
| 2931 | paUsers[i].iUserTable = iUserTable;
|
|---|
| 2932 | pPage->iUserHead = i;
|
|---|
| 2933 |
|
|---|
| 2934 | # ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 2935 | if (pPage->fDirty)
|
|---|
| 2936 | pgmPoolFlushDirtyPage(pPool->CTX_SUFF(pVM), pPool, pPage->idxDirtyEntry, false /* do not remove */);
|
|---|
| 2937 | # endif
|
|---|
| 2938 |
|
|---|
| 2939 | /*
|
|---|
| 2940 | * Tell the cache to update its replacement stats for this page.
|
|---|
| 2941 | */
|
|---|
| 2942 | pgmPoolCacheUsed(pPool, pPage);
|
|---|
| 2943 | return VINF_SUCCESS;
|
|---|
| 2944 | }
|
|---|
| 2945 |
|
|---|
| 2946 |
|
|---|
| 2947 | /**
|
|---|
| 2948 | * Frees a user record associated with a page.
|
|---|
| 2949 | *
|
|---|
| 2950 | * This does not clear the entry in the user table, it simply replaces the
|
|---|
| 2951 | * user record to the chain of free records.
|
|---|
| 2952 | *
|
|---|
| 2953 | * @param pPool The pool.
|
|---|
| 2954 | * @param pPage The shadow page.
|
|---|
| 2955 | * @param iUser The shadow page pool index of the user table.
|
|---|
| 2956 | * @param iUserTable The index into the user table (shadowed).
|
|---|
| 2957 | *
|
|---|
| 2958 | * @remarks Don't call this for root pages.
|
|---|
| 2959 | */
|
|---|
| 2960 | static void pgmPoolTrackFreeUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable)
|
|---|
| 2961 | {
|
|---|
| 2962 | Log3(("pgmPoolTrackFreeUser %RGp %x %x\n", pPage->GCPhys, iUser, iUserTable));
|
|---|
| 2963 | PPGMPOOLUSER paUsers = pPool->CTX_SUFF(paUsers);
|
|---|
| 2964 | Assert(iUser != NIL_PGMPOOL_IDX);
|
|---|
| 2965 |
|
|---|
| 2966 | /*
|
|---|
| 2967 | * Unlink and free the specified user entry.
|
|---|
| 2968 | */
|
|---|
| 2969 |
|
|---|
| 2970 | /* Special: For PAE and 32-bit paging, there is usually no more than one user. */
|
|---|
| 2971 | uint16_t i = pPage->iUserHead;
|
|---|
| 2972 | if ( i != NIL_PGMPOOL_USER_INDEX
|
|---|
| 2973 | && paUsers[i].iUser == iUser
|
|---|
| 2974 | && paUsers[i].iUserTable == iUserTable)
|
|---|
| 2975 | {
|
|---|
| 2976 | pPage->iUserHead = paUsers[i].iNext;
|
|---|
| 2977 |
|
|---|
| 2978 | paUsers[i].iUser = NIL_PGMPOOL_IDX;
|
|---|
| 2979 | paUsers[i].iNext = pPool->iUserFreeHead;
|
|---|
| 2980 | pPool->iUserFreeHead = i;
|
|---|
| 2981 | return;
|
|---|
| 2982 | }
|
|---|
| 2983 |
|
|---|
| 2984 | /* General: Linear search. */
|
|---|
| 2985 | uint16_t iPrev = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 2986 | while (i != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2987 | {
|
|---|
| 2988 | if ( paUsers[i].iUser == iUser
|
|---|
| 2989 | && paUsers[i].iUserTable == iUserTable)
|
|---|
| 2990 | {
|
|---|
| 2991 | if (iPrev != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 2992 | paUsers[iPrev].iNext = paUsers[i].iNext;
|
|---|
| 2993 | else
|
|---|
| 2994 | pPage->iUserHead = paUsers[i].iNext;
|
|---|
| 2995 |
|
|---|
| 2996 | paUsers[i].iUser = NIL_PGMPOOL_IDX;
|
|---|
| 2997 | paUsers[i].iNext = pPool->iUserFreeHead;
|
|---|
| 2998 | pPool->iUserFreeHead = i;
|
|---|
| 2999 | return;
|
|---|
| 3000 | }
|
|---|
| 3001 | iPrev = i;
|
|---|
| 3002 | i = paUsers[i].iNext;
|
|---|
| 3003 | }
|
|---|
| 3004 |
|
|---|
| 3005 | /* Fatal: didn't find it */
|
|---|
| 3006 | AssertFatalMsgFailed(("Didn't find the user entry! iUser=%d iUserTable=%#x GCPhys=%RGp\n",
|
|---|
| 3007 | iUser, iUserTable, pPage->GCPhys));
|
|---|
| 3008 | }
|
|---|
| 3009 |
|
|---|
| 3010 |
|
|---|
| 3011 | #if 0 /* unused */
|
|---|
| 3012 | /**
|
|---|
| 3013 | * Gets the entry size of a shadow table.
|
|---|
| 3014 | *
|
|---|
| 3015 | * @param enmKind The kind of page.
|
|---|
| 3016 | *
|
|---|
| 3017 | * @returns The size of the entry in bytes. That is, 4 or 8.
|
|---|
| 3018 | * @returns If the kind is not for a table, an assertion is raised and 0 is
|
|---|
| 3019 | * returned.
|
|---|
| 3020 | */
|
|---|
| 3021 | DECLINLINE(unsigned) pgmPoolTrackGetShadowEntrySize(PGMPOOLKIND enmKind)
|
|---|
| 3022 | {
|
|---|
| 3023 | switch (enmKind)
|
|---|
| 3024 | {
|
|---|
| 3025 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 3026 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 3027 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 3028 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 3029 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 3030 | return 4;
|
|---|
| 3031 |
|
|---|
| 3032 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 3033 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 3034 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 3035 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 3036 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 3037 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 3038 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 3039 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 3040 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 3041 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 3042 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 3043 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 3044 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 3045 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 3046 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 3047 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 3048 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 3049 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 3050 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 3051 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 3052 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 3053 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 3054 | return 8;
|
|---|
| 3055 |
|
|---|
| 3056 | default:
|
|---|
| 3057 | AssertFatalMsgFailed(("enmKind=%d\n", enmKind));
|
|---|
| 3058 | }
|
|---|
| 3059 | }
|
|---|
| 3060 | #endif /* unused */
|
|---|
| 3061 |
|
|---|
| 3062 | #if 0 /* unused */
|
|---|
| 3063 | /**
|
|---|
| 3064 | * Gets the entry size of a guest table.
|
|---|
| 3065 | *
|
|---|
| 3066 | * @param enmKind The kind of page.
|
|---|
| 3067 | *
|
|---|
| 3068 | * @returns The size of the entry in bytes. That is, 0, 4 or 8.
|
|---|
| 3069 | * @returns If the kind is not for a table, an assertion is raised and 0 is
|
|---|
| 3070 | * returned.
|
|---|
| 3071 | */
|
|---|
| 3072 | DECLINLINE(unsigned) pgmPoolTrackGetGuestEntrySize(PGMPOOLKIND enmKind)
|
|---|
| 3073 | {
|
|---|
| 3074 | switch (enmKind)
|
|---|
| 3075 | {
|
|---|
| 3076 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 3077 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 3078 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 3079 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 3080 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 3081 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 3082 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 3083 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 3084 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 3085 | return 4;
|
|---|
| 3086 |
|
|---|
| 3087 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 3088 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 3089 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 3090 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 3091 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 3092 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 3093 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 3094 | return 8;
|
|---|
| 3095 |
|
|---|
| 3096 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 3097 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 3098 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 3099 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 3100 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 3101 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 3102 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 3103 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 3104 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 3105 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 3106 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 3107 | /** @todo can we return 0? (nobody is calling this...) */
|
|---|
| 3108 | AssertFailed();
|
|---|
| 3109 | return 0;
|
|---|
| 3110 |
|
|---|
| 3111 | default:
|
|---|
| 3112 | AssertFatalMsgFailed(("enmKind=%d\n", enmKind));
|
|---|
| 3113 | }
|
|---|
| 3114 | }
|
|---|
| 3115 | #endif /* unused */
|
|---|
| 3116 |
|
|---|
| 3117 |
|
|---|
| 3118 | /**
|
|---|
| 3119 | * Checks one shadow page table entry for a mapping of a physical page.
|
|---|
| 3120 | *
|
|---|
| 3121 | * @returns true / false indicating removal of all relevant PTEs
|
|---|
| 3122 | *
|
|---|
| 3123 | * @param pVM The cross context VM structure.
|
|---|
| 3124 | * @param pPhysPage The guest page in question.
|
|---|
| 3125 | * @param fFlushPTEs Flush PTEs or allow them to be updated (e.g. in case of an RW bit change)
|
|---|
| 3126 | * @param iShw The shadow page table.
|
|---|
| 3127 | * @param iPte Page table entry or NIL_PGMPOOL_PHYSEXT_IDX_PTE if unknown
|
|---|
| 3128 | */
|
|---|
| 3129 | static bool pgmPoolTrackFlushGCPhysPTInt(PVM pVM, PCPGMPAGE pPhysPage, bool fFlushPTEs, uint16_t iShw, uint16_t iPte)
|
|---|
| 3130 | {
|
|---|
| 3131 | LogFlow(("pgmPoolTrackFlushGCPhysPTInt: pPhysPage=%RHp iShw=%d iPte=%d\n", PGM_PAGE_GET_HCPHYS(pPhysPage), iShw, iPte));
|
|---|
| 3132 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3133 | bool fRet = false;
|
|---|
| 3134 |
|
|---|
| 3135 | /*
|
|---|
| 3136 | * Assert sanity.
|
|---|
| 3137 | */
|
|---|
| 3138 | Assert(iPte != NIL_PGMPOOL_PHYSEXT_IDX_PTE);
|
|---|
| 3139 | AssertFatalMsg(iShw < pPool->cCurPages && iShw != NIL_PGMPOOL_IDX, ("iShw=%d\n", iShw));
|
|---|
| 3140 | PPGMPOOLPAGE pPage = &pPool->aPages[iShw];
|
|---|
| 3141 |
|
|---|
| 3142 | /*
|
|---|
| 3143 | * Then, clear the actual mappings to the page in the shadow PT.
|
|---|
| 3144 | */
|
|---|
| 3145 | switch (pPage->enmKind)
|
|---|
| 3146 | {
|
|---|
| 3147 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 3148 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 3149 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 3150 | {
|
|---|
| 3151 | const uint32_t u32 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
|
|---|
| 3152 | PX86PT pPT = (PX86PT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3153 | uint32_t u32AndMask = 0;
|
|---|
| 3154 | uint32_t u32OrMask = 0;
|
|---|
| 3155 |
|
|---|
| 3156 | if (!fFlushPTEs)
|
|---|
| 3157 | {
|
|---|
| 3158 | switch (PGM_PAGE_GET_HNDL_PHYS_STATE(pPhysPage))
|
|---|
| 3159 | {
|
|---|
| 3160 | case PGM_PAGE_HNDL_PHYS_STATE_NONE: /* No handler installed. */
|
|---|
| 3161 | case PGM_PAGE_HNDL_PHYS_STATE_DISABLED: /* Monitoring is temporarily disabled. */
|
|---|
| 3162 | u32OrMask = X86_PTE_RW;
|
|---|
| 3163 | u32AndMask = UINT32_MAX;
|
|---|
| 3164 | fRet = true;
|
|---|
| 3165 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntryKeep);
|
|---|
| 3166 | break;
|
|---|
| 3167 |
|
|---|
| 3168 | case PGM_PAGE_HNDL_PHYS_STATE_WRITE: /* Write access is monitored. */
|
|---|
| 3169 | u32OrMask = 0;
|
|---|
| 3170 | u32AndMask = ~X86_PTE_RW;
|
|---|
| 3171 | fRet = true;
|
|---|
| 3172 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntryKeep);
|
|---|
| 3173 | break;
|
|---|
| 3174 | default:
|
|---|
| 3175 | /* (shouldn't be here, will assert below) */
|
|---|
| 3176 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3177 | break;
|
|---|
| 3178 | }
|
|---|
| 3179 | }
|
|---|
| 3180 | else
|
|---|
| 3181 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3182 |
|
|---|
| 3183 | /* Update the counter if we're removing references. */
|
|---|
| 3184 | if (!u32AndMask)
|
|---|
| 3185 | {
|
|---|
| 3186 | Assert(pPage->cPresent);
|
|---|
| 3187 | Assert(pPool->cPresent);
|
|---|
| 3188 | pPage->cPresent--;
|
|---|
| 3189 | pPool->cPresent--;
|
|---|
| 3190 | }
|
|---|
| 3191 |
|
|---|
| 3192 | if ((pPT->a[iPte].u & (X86_PTE_PG_MASK | X86_PTE_P)) == u32)
|
|---|
| 3193 | {
|
|---|
| 3194 | Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pte=%RX32\n", iPte, pPT->a[iPte]));
|
|---|
| 3195 | X86PTE Pte;
|
|---|
| 3196 | Pte.u = (pPT->a[iPte].u & u32AndMask) | u32OrMask;
|
|---|
| 3197 | if (Pte.u & PGM_PTFLAGS_TRACK_DIRTY)
|
|---|
| 3198 | Pte.u &= ~(X86PGUINT)X86_PTE_RW; /* need to disallow writes when dirty bit tracking is still active. */
|
|---|
| 3199 | ASMAtomicWriteU32(&pPT->a[iPte].u, Pte.u);
|
|---|
| 3200 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);
|
|---|
| 3201 | return fRet;
|
|---|
| 3202 | }
|
|---|
| 3203 | #ifdef LOG_ENABLED
|
|---|
| 3204 | Log(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3205 | for (unsigned i = 0, cFound = 0; i < RT_ELEMENTS(pPT->a); i++)
|
|---|
| 3206 | if ((pPT->a[i].u & (X86_PTE_PG_MASK | X86_PTE_P)) == u32)
|
|---|
| 3207 | {
|
|---|
| 3208 | Log(("i=%d cFound=%d\n", i, ++cFound));
|
|---|
| 3209 | }
|
|---|
| 3210 | #endif
|
|---|
| 3211 | AssertFatalMsgFailed(("iFirstPresent=%d cPresent=%d u32=%RX32 poolkind=%x\n", pPage->iFirstPresent, pPage->cPresent, u32, pPage->enmKind));
|
|---|
| 3212 | /*PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);*/
|
|---|
| 3213 | break;
|
|---|
| 3214 | }
|
|---|
| 3215 |
|
|---|
| 3216 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 3217 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 3218 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 3219 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 3220 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 3221 | case PGMPOOLKIND_EPT_PT_FOR_PHYS: /* physical mask the same as PAE; RW bit as well; be careful! */
|
|---|
| 3222 | {
|
|---|
| 3223 | const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
|
|---|
| 3224 | PPGMSHWPTPAE pPT = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3225 | uint64_t u64OrMask = 0;
|
|---|
| 3226 | uint64_t u64AndMask = 0;
|
|---|
| 3227 |
|
|---|
| 3228 | if (!fFlushPTEs)
|
|---|
| 3229 | {
|
|---|
| 3230 | switch (PGM_PAGE_GET_HNDL_PHYS_STATE(pPhysPage))
|
|---|
| 3231 | {
|
|---|
| 3232 | case PGM_PAGE_HNDL_PHYS_STATE_NONE: /* No handler installed. */
|
|---|
| 3233 | case PGM_PAGE_HNDL_PHYS_STATE_DISABLED: /* Monitoring is temporarily disabled. */
|
|---|
| 3234 | u64OrMask = X86_PTE_RW;
|
|---|
| 3235 | u64AndMask = UINT64_MAX;
|
|---|
| 3236 | fRet = true;
|
|---|
| 3237 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntryKeep);
|
|---|
| 3238 | break;
|
|---|
| 3239 |
|
|---|
| 3240 | case PGM_PAGE_HNDL_PHYS_STATE_WRITE: /* Write access is monitored. */
|
|---|
| 3241 | u64OrMask = 0;
|
|---|
| 3242 | u64AndMask = ~(uint64_t)X86_PTE_RW;
|
|---|
| 3243 | fRet = true;
|
|---|
| 3244 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntryKeep);
|
|---|
| 3245 | break;
|
|---|
| 3246 |
|
|---|
| 3247 | default:
|
|---|
| 3248 | /* (shouldn't be here, will assert below) */
|
|---|
| 3249 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3250 | break;
|
|---|
| 3251 | }
|
|---|
| 3252 | }
|
|---|
| 3253 | else
|
|---|
| 3254 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3255 |
|
|---|
| 3256 | /* Update the counter if we're removing references. */
|
|---|
| 3257 | if (!u64AndMask)
|
|---|
| 3258 | {
|
|---|
| 3259 | Assert(pPage->cPresent);
|
|---|
| 3260 | Assert(pPool->cPresent);
|
|---|
| 3261 | pPage->cPresent--;
|
|---|
| 3262 | pPool->cPresent--;
|
|---|
| 3263 | }
|
|---|
| 3264 |
|
|---|
| 3265 | if ((PGMSHWPTEPAE_GET_U(pPT->a[iPte]) & (X86_PTE_PAE_PG_MASK | X86_PTE_P | X86_PTE_PAE_MBZ_MASK_NX)) == u64)
|
|---|
| 3266 | {
|
|---|
| 3267 | Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pte=%RX64\n", iPte, PGMSHWPTEPAE_GET_LOG(pPT->a[iPte])));
|
|---|
| 3268 | X86PTEPAE Pte;
|
|---|
| 3269 | Pte.u = (PGMSHWPTEPAE_GET_U(pPT->a[iPte]) & u64AndMask) | u64OrMask;
|
|---|
| 3270 | if (Pte.u & PGM_PTFLAGS_TRACK_DIRTY)
|
|---|
| 3271 | Pte.u &= ~(X86PGPAEUINT)X86_PTE_RW; /* need to disallow writes when dirty bit tracking is still active. */
|
|---|
| 3272 |
|
|---|
| 3273 | PGMSHWPTEPAE_ATOMIC_SET(pPT->a[iPte], Pte.u);
|
|---|
| 3274 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);
|
|---|
| 3275 | return fRet;
|
|---|
| 3276 | }
|
|---|
| 3277 | #ifdef LOG_ENABLED
|
|---|
| 3278 | Log(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3279 | Log(("Found %RX64 expected %RX64\n", PGMSHWPTEPAE_GET_U(pPT->a[iPte]) & (X86_PTE_PAE_PG_MASK | X86_PTE_P | X86_PTE_PAE_MBZ_MASK_NX), u64));
|
|---|
| 3280 | for (unsigned i = 0, cFound = 0; i < RT_ELEMENTS(pPT->a); i++)
|
|---|
| 3281 | if ((PGMSHWPTEPAE_GET_U(pPT->a[i]) & (X86_PTE_PAE_PG_MASK | X86_PTE_P | X86_PTE_PAE_MBZ_MASK_NX)) == u64)
|
|---|
| 3282 | Log(("i=%d cFound=%d\n", i, ++cFound));
|
|---|
| 3283 | #endif
|
|---|
| 3284 | AssertFatalMsgFailed(("iFirstPresent=%d cPresent=%d u64=%RX64 poolkind=%x iPte=%d PT=%RX64\n", pPage->iFirstPresent, pPage->cPresent, u64, pPage->enmKind, iPte, PGMSHWPTEPAE_GET_LOG(pPT->a[iPte])));
|
|---|
| 3285 | /*PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);*/
|
|---|
| 3286 | break;
|
|---|
| 3287 | }
|
|---|
| 3288 |
|
|---|
| 3289 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 3290 | /* Large page case only. */
|
|---|
| 3291 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 3292 | {
|
|---|
| 3293 | Assert(pVM->pgm.s.fNestedPaging);
|
|---|
| 3294 |
|
|---|
| 3295 | const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PDE4M_P | X86_PDE4M_PS;
|
|---|
| 3296 | PEPTPD pPD = (PEPTPD)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3297 |
|
|---|
| 3298 | if ((pPD->a[iPte].u & (EPT_PDE2M_PG_MASK | X86_PDE4M_P | X86_PDE4M_PS)) == u64)
|
|---|
| 3299 | {
|
|---|
| 3300 | Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pde=%RX64\n", iPte, pPD->a[iPte]));
|
|---|
| 3301 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3302 | pPD->a[iPte].u = 0;
|
|---|
| 3303 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPD);
|
|---|
| 3304 |
|
|---|
| 3305 | /* Update the counter as we're removing references. */
|
|---|
| 3306 | Assert(pPage->cPresent);
|
|---|
| 3307 | Assert(pPool->cPresent);
|
|---|
| 3308 | pPage->cPresent--;
|
|---|
| 3309 | pPool->cPresent--;
|
|---|
| 3310 |
|
|---|
| 3311 | return fRet;
|
|---|
| 3312 | }
|
|---|
| 3313 | # ifdef LOG_ENABLED
|
|---|
| 3314 | Log(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3315 | for (unsigned i = 0, cFound = 0; i < RT_ELEMENTS(pPD->a); i++)
|
|---|
| 3316 | if ((pPD->a[i].u & (EPT_PDE2M_PG_MASK | X86_PDE4M_P | X86_PDE4M_PS)) == u64)
|
|---|
| 3317 | Log(("i=%d cFound=%d\n", i, ++cFound));
|
|---|
| 3318 | # endif
|
|---|
| 3319 | AssertFatalMsgFailed(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3320 | /*PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPD);*/
|
|---|
| 3321 | break;
|
|---|
| 3322 | }
|
|---|
| 3323 |
|
|---|
| 3324 | /* AMD-V nested paging */ /** @todo merge with EPT as we only check the parts that are identical. */
|
|---|
| 3325 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 3326 | {
|
|---|
| 3327 | Assert(pVM->pgm.s.fNestedPaging);
|
|---|
| 3328 |
|
|---|
| 3329 | const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PDE4M_P | X86_PDE4M_PS;
|
|---|
| 3330 | PX86PDPAE pPD = (PX86PDPAE)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3331 |
|
|---|
| 3332 | if ((pPD->a[iPte].u & (X86_PDE2M_PAE_PG_MASK | X86_PDE4M_P | X86_PDE4M_PS)) == u64)
|
|---|
| 3333 | {
|
|---|
| 3334 | Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pde=%RX64\n", iPte, pPD->a[iPte]));
|
|---|
| 3335 | STAM_COUNTER_INC(&pPool->StatTrackFlushEntry);
|
|---|
| 3336 | pPD->a[iPte].u = 0;
|
|---|
| 3337 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPD);
|
|---|
| 3338 |
|
|---|
| 3339 | /* Update the counter as we're removing references. */
|
|---|
| 3340 | Assert(pPage->cPresent);
|
|---|
| 3341 | Assert(pPool->cPresent);
|
|---|
| 3342 | pPage->cPresent--;
|
|---|
| 3343 | pPool->cPresent--;
|
|---|
| 3344 | return fRet;
|
|---|
| 3345 | }
|
|---|
| 3346 | # ifdef LOG_ENABLED
|
|---|
| 3347 | Log(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3348 | for (unsigned i = 0, cFound = 0; i < RT_ELEMENTS(pPD->a); i++)
|
|---|
| 3349 | if ((pPD->a[i].u & (X86_PDE2M_PAE_PG_MASK | X86_PDE4M_P | X86_PDE4M_PS)) == u64)
|
|---|
| 3350 | Log(("i=%d cFound=%d\n", i, ++cFound));
|
|---|
| 3351 | # endif
|
|---|
| 3352 | AssertFatalMsgFailed(("iFirstPresent=%d cPresent=%d\n", pPage->iFirstPresent, pPage->cPresent));
|
|---|
| 3353 | /*PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPD);*/
|
|---|
| 3354 | break;
|
|---|
| 3355 | }
|
|---|
| 3356 | #endif /* PGM_WITH_LARGE_PAGES */
|
|---|
| 3357 |
|
|---|
| 3358 | default:
|
|---|
| 3359 | AssertFatalMsgFailed(("enmKind=%d iShw=%d\n", pPage->enmKind, iShw));
|
|---|
| 3360 | }
|
|---|
| 3361 |
|
|---|
| 3362 | /* not reached. */
|
|---|
| 3363 | #ifndef _MSC_VER
|
|---|
| 3364 | return fRet;
|
|---|
| 3365 | #endif
|
|---|
| 3366 | }
|
|---|
| 3367 |
|
|---|
| 3368 |
|
|---|
| 3369 | /**
|
|---|
| 3370 | * Scans one shadow page table for mappings of a physical page.
|
|---|
| 3371 | *
|
|---|
| 3372 | * @param pVM The cross context VM structure.
|
|---|
| 3373 | * @param pPhysPage The guest page in question.
|
|---|
| 3374 | * @param fFlushPTEs Flush PTEs or allow them to be updated (e.g. in case of an RW bit change)
|
|---|
| 3375 | * @param iShw The shadow page table.
|
|---|
| 3376 | */
|
|---|
| 3377 | static void pgmPoolTrackFlushGCPhysPT(PVM pVM, PPGMPAGE pPhysPage, bool fFlushPTEs, uint16_t iShw)
|
|---|
| 3378 | {
|
|---|
| 3379 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); NOREF(pPool);
|
|---|
| 3380 |
|
|---|
| 3381 | /* We should only come here with when there's only one reference to this physical page. */
|
|---|
| 3382 | Assert(PGMPOOL_TD_GET_CREFS(PGM_PAGE_GET_TRACKING(pPhysPage)) == 1);
|
|---|
| 3383 |
|
|---|
| 3384 | Log2(("pgmPoolTrackFlushGCPhysPT: pPhysPage=%RHp iShw=%d\n", PGM_PAGE_GET_HCPHYS(pPhysPage), iShw));
|
|---|
| 3385 | STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPT, f);
|
|---|
| 3386 | bool fKeptPTEs = pgmPoolTrackFlushGCPhysPTInt(pVM, pPhysPage, fFlushPTEs, iShw, PGM_PAGE_GET_PTE_INDEX(pPhysPage));
|
|---|
| 3387 | if (!fKeptPTEs)
|
|---|
| 3388 | PGM_PAGE_SET_TRACKING(pVM, pPhysPage, 0);
|
|---|
| 3389 | STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPT, f);
|
|---|
| 3390 | }
|
|---|
| 3391 |
|
|---|
| 3392 |
|
|---|
| 3393 | /**
|
|---|
| 3394 | * Flushes a list of shadow page tables mapping the same physical page.
|
|---|
| 3395 | *
|
|---|
| 3396 | * @param pVM The cross context VM structure.
|
|---|
| 3397 | * @param pPhysPage The guest page in question.
|
|---|
| 3398 | * @param fFlushPTEs Flush PTEs or allow them to be updated (e.g. in case of an RW bit change)
|
|---|
| 3399 | * @param iPhysExt The physical cross reference extent list to flush.
|
|---|
| 3400 | */
|
|---|
| 3401 | static void pgmPoolTrackFlushGCPhysPTs(PVMCC pVM, PPGMPAGE pPhysPage, bool fFlushPTEs, uint16_t iPhysExt)
|
|---|
| 3402 | {
|
|---|
| 3403 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 3404 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3405 | bool fKeepList = false;
|
|---|
| 3406 |
|
|---|
| 3407 | STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPTs, f);
|
|---|
| 3408 | Log2(("pgmPoolTrackFlushGCPhysPTs: pPhysPage=%RHp iPhysExt=%u\n", PGM_PAGE_GET_HCPHYS(pPhysPage), iPhysExt));
|
|---|
| 3409 |
|
|---|
| 3410 | const uint16_t iPhysExtStart = iPhysExt;
|
|---|
| 3411 | PPGMPOOLPHYSEXT pPhysExt;
|
|---|
| 3412 | do
|
|---|
| 3413 | {
|
|---|
| 3414 | Assert(iPhysExt < pPool->cMaxPhysExts);
|
|---|
| 3415 | pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
|
|---|
| 3416 | for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
|
|---|
| 3417 | {
|
|---|
| 3418 | if (pPhysExt->aidx[i] != NIL_PGMPOOL_IDX)
|
|---|
| 3419 | {
|
|---|
| 3420 | bool fKeptPTEs = pgmPoolTrackFlushGCPhysPTInt(pVM, pPhysPage, fFlushPTEs, pPhysExt->aidx[i], pPhysExt->apte[i]);
|
|---|
| 3421 | if (!fKeptPTEs)
|
|---|
| 3422 | {
|
|---|
| 3423 | pPhysExt->aidx[i] = NIL_PGMPOOL_IDX;
|
|---|
| 3424 | pPhysExt->apte[i] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 3425 | }
|
|---|
| 3426 | else
|
|---|
| 3427 | fKeepList = true;
|
|---|
| 3428 | }
|
|---|
| 3429 | }
|
|---|
| 3430 | /* next */
|
|---|
| 3431 | iPhysExt = pPhysExt->iNext;
|
|---|
| 3432 | } while (iPhysExt != NIL_PGMPOOL_PHYSEXT_INDEX);
|
|---|
| 3433 |
|
|---|
| 3434 | if (!fKeepList)
|
|---|
| 3435 | {
|
|---|
| 3436 | /* insert the list into the free list and clear the ram range entry. */
|
|---|
| 3437 | pPhysExt->iNext = pPool->iPhysExtFreeHead;
|
|---|
| 3438 | pPool->iPhysExtFreeHead = iPhysExtStart;
|
|---|
| 3439 | /* Invalidate the tracking data. */
|
|---|
| 3440 | PGM_PAGE_SET_TRACKING(pVM, pPhysPage, 0);
|
|---|
| 3441 | }
|
|---|
| 3442 |
|
|---|
| 3443 | STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTs, f);
|
|---|
| 3444 | }
|
|---|
| 3445 |
|
|---|
| 3446 |
|
|---|
| 3447 | /**
|
|---|
| 3448 | * Flushes all shadow page table mappings of the given guest page.
|
|---|
| 3449 | *
|
|---|
| 3450 | * This is typically called when the host page backing the guest one has been
|
|---|
| 3451 | * replaced or when the page protection was changed due to a guest access
|
|---|
| 3452 | * caught by the monitoring.
|
|---|
| 3453 | *
|
|---|
| 3454 | * @returns VBox status code.
|
|---|
| 3455 | * @retval VINF_SUCCESS if all references has been successfully cleared.
|
|---|
| 3456 | * @retval VINF_PGM_SYNC_CR3 if we're better off with a CR3 sync and a page
|
|---|
| 3457 | * pool cleaning. FF and sync flags are set.
|
|---|
| 3458 | *
|
|---|
| 3459 | * @param pVM The cross context VM structure.
|
|---|
| 3460 | * @param GCPhysPage GC physical address of the page in question
|
|---|
| 3461 | * @param pPhysPage The guest page in question.
|
|---|
| 3462 | * @param fFlushPTEs Flush PTEs or allow them to be updated (e.g. in case of an RW bit change)
|
|---|
| 3463 | * @param pfFlushTLBs This is set to @a true if the shadow TLBs should be
|
|---|
| 3464 | * flushed, it is NOT touched if this isn't necessary.
|
|---|
| 3465 | * The caller MUST initialized this to @a false.
|
|---|
| 3466 | */
|
|---|
| 3467 | int pgmPoolTrackUpdateGCPhys(PVMCC pVM, RTGCPHYS GCPhysPage, PPGMPAGE pPhysPage, bool fFlushPTEs, bool *pfFlushTLBs)
|
|---|
| 3468 | {
|
|---|
| 3469 | PVMCPUCC pVCpu = VMMGetCpu(pVM);
|
|---|
| 3470 | PGM_LOCK_VOID(pVM);
|
|---|
| 3471 | int rc = VINF_SUCCESS;
|
|---|
| 3472 |
|
|---|
| 3473 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 3474 | /* Is this page part of a large page? */
|
|---|
| 3475 | if (PGM_PAGE_GET_PDE_TYPE(pPhysPage) == PGM_PAGE_PDE_TYPE_PDE)
|
|---|
| 3476 | {
|
|---|
| 3477 | RTGCPHYS GCPhysBase = GCPhysPage & X86_PDE2M_PAE_PG_MASK;
|
|---|
| 3478 | GCPhysPage &= X86_PDE_PAE_PG_MASK;
|
|---|
| 3479 |
|
|---|
| 3480 | /* Fetch the large page base. */
|
|---|
| 3481 | PPGMPAGE pLargePage;
|
|---|
| 3482 | if (GCPhysBase != GCPhysPage)
|
|---|
| 3483 | {
|
|---|
| 3484 | pLargePage = pgmPhysGetPage(pVM, GCPhysBase);
|
|---|
| 3485 | AssertFatal(pLargePage);
|
|---|
| 3486 | }
|
|---|
| 3487 | else
|
|---|
| 3488 | pLargePage = pPhysPage;
|
|---|
| 3489 |
|
|---|
| 3490 | Log(("pgmPoolTrackUpdateGCPhys: update large page PDE for %RGp (%RGp)\n", GCPhysBase, GCPhysPage));
|
|---|
| 3491 |
|
|---|
| 3492 | if (PGM_PAGE_GET_PDE_TYPE(pLargePage) == PGM_PAGE_PDE_TYPE_PDE)
|
|---|
| 3493 | {
|
|---|
| 3494 | /* Mark the large page as disabled as we need to break it up to change a single page in the 2 MB range. */
|
|---|
| 3495 | PGM_PAGE_SET_PDE_TYPE(pVM, pLargePage, PGM_PAGE_PDE_TYPE_PDE_DISABLED);
|
|---|
| 3496 | pVM->pgm.s.cLargePagesDisabled++;
|
|---|
| 3497 |
|
|---|
| 3498 | /* Update the base as that *only* that one has a reference and there's only one PDE to clear. */
|
|---|
| 3499 | rc = pgmPoolTrackUpdateGCPhys(pVM, GCPhysBase, pLargePage, fFlushPTEs, pfFlushTLBs);
|
|---|
| 3500 |
|
|---|
| 3501 | *pfFlushTLBs = true;
|
|---|
| 3502 | PGM_UNLOCK(pVM);
|
|---|
| 3503 | return rc;
|
|---|
| 3504 | }
|
|---|
| 3505 | }
|
|---|
| 3506 | #else
|
|---|
| 3507 | NOREF(GCPhysPage);
|
|---|
| 3508 | #endif /* PGM_WITH_LARGE_PAGES */
|
|---|
| 3509 |
|
|---|
| 3510 | const uint16_t u16 = PGM_PAGE_GET_TRACKING(pPhysPage);
|
|---|
| 3511 | if (u16)
|
|---|
| 3512 | {
|
|---|
| 3513 | /*
|
|---|
| 3514 | * The zero page is currently screwing up the tracking and we'll
|
|---|
| 3515 | * have to flush the whole shebang. Unless VBOX_WITH_NEW_LAZY_PAGE_ALLOC
|
|---|
| 3516 | * is defined, zero pages won't normally be mapped. Some kind of solution
|
|---|
| 3517 | * will be needed for this problem of course, but it will have to wait...
|
|---|
| 3518 | */
|
|---|
| 3519 | if ( PGM_PAGE_IS_ZERO(pPhysPage)
|
|---|
| 3520 | || PGM_PAGE_IS_BALLOONED(pPhysPage))
|
|---|
| 3521 | rc = VINF_PGM_GCPHYS_ALIASED;
|
|---|
| 3522 | else
|
|---|
| 3523 | {
|
|---|
| 3524 | if (PGMPOOL_TD_GET_CREFS(u16) != PGMPOOL_TD_CREFS_PHYSEXT)
|
|---|
| 3525 | {
|
|---|
| 3526 | Assert(PGMPOOL_TD_GET_CREFS(u16) == 1);
|
|---|
| 3527 | pgmPoolTrackFlushGCPhysPT(pVM,
|
|---|
| 3528 | pPhysPage,
|
|---|
| 3529 | fFlushPTEs,
|
|---|
| 3530 | PGMPOOL_TD_GET_IDX(u16));
|
|---|
| 3531 | }
|
|---|
| 3532 | else if (u16 != PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED))
|
|---|
| 3533 | pgmPoolTrackFlushGCPhysPTs(pVM, pPhysPage, fFlushPTEs, PGMPOOL_TD_GET_IDX(u16));
|
|---|
| 3534 | else
|
|---|
| 3535 | rc = pgmPoolTrackFlushGCPhysPTsSlow(pVM, pPhysPage);
|
|---|
| 3536 | *pfFlushTLBs = true;
|
|---|
| 3537 | }
|
|---|
| 3538 | }
|
|---|
| 3539 |
|
|---|
| 3540 | if (rc == VINF_PGM_GCPHYS_ALIASED)
|
|---|
| 3541 | {
|
|---|
| 3542 | pVCpu->pgm.s.fSyncFlags |= PGM_SYNC_CLEAR_PGM_POOL;
|
|---|
| 3543 | VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|---|
| 3544 | rc = VINF_PGM_SYNC_CR3;
|
|---|
| 3545 | }
|
|---|
| 3546 | PGM_UNLOCK(pVM);
|
|---|
| 3547 | return rc;
|
|---|
| 3548 | }
|
|---|
| 3549 |
|
|---|
| 3550 |
|
|---|
| 3551 | /**
|
|---|
| 3552 | * Scans all shadow page tables for mappings of a physical page.
|
|---|
| 3553 | *
|
|---|
| 3554 | * This may be slow, but it's most likely more efficient than cleaning
|
|---|
| 3555 | * out the entire page pool / cache.
|
|---|
| 3556 | *
|
|---|
| 3557 | * @returns VBox status code.
|
|---|
| 3558 | * @retval VINF_SUCCESS if all references has been successfully cleared.
|
|---|
| 3559 | * @retval VINF_PGM_GCPHYS_ALIASED if we're better off with a CR3 sync and
|
|---|
| 3560 | * a page pool cleaning.
|
|---|
| 3561 | *
|
|---|
| 3562 | * @param pVM The cross context VM structure.
|
|---|
| 3563 | * @param pPhysPage The guest page in question.
|
|---|
| 3564 | */
|
|---|
| 3565 | int pgmPoolTrackFlushGCPhysPTsSlow(PVMCC pVM, PPGMPAGE pPhysPage)
|
|---|
| 3566 | {
|
|---|
| 3567 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3568 | STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPTsSlow, s);
|
|---|
| 3569 | LogFlow(("pgmPoolTrackFlushGCPhysPTsSlow: cUsedPages=%d cPresent=%d pPhysPage=%R[pgmpage]\n",
|
|---|
| 3570 | pPool->cUsedPages, pPool->cPresent, pPhysPage));
|
|---|
| 3571 |
|
|---|
| 3572 | /*
|
|---|
| 3573 | * There is a limit to what makes sense.
|
|---|
| 3574 | */
|
|---|
| 3575 | if ( pPool->cPresent > 1024
|
|---|
| 3576 | && pVM->cCpus == 1)
|
|---|
| 3577 | {
|
|---|
| 3578 | LogFlow(("pgmPoolTrackFlushGCPhysPTsSlow: giving up... (cPresent=%d)\n", pPool->cPresent));
|
|---|
| 3579 | STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTsSlow, s);
|
|---|
| 3580 | return VINF_PGM_GCPHYS_ALIASED;
|
|---|
| 3581 | }
|
|---|
| 3582 |
|
|---|
| 3583 | /*
|
|---|
| 3584 | * Iterate all the pages until we've encountered all that in use.
|
|---|
| 3585 | * This is simple but not quite optimal solution.
|
|---|
| 3586 | */
|
|---|
| 3587 | const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage);
|
|---|
| 3588 | unsigned cLeft = pPool->cUsedPages;
|
|---|
| 3589 | unsigned iPage = pPool->cCurPages;
|
|---|
| 3590 | while (--iPage >= PGMPOOL_IDX_FIRST)
|
|---|
| 3591 | {
|
|---|
| 3592 | PPGMPOOLPAGE pPage = &pPool->aPages[iPage];
|
|---|
| 3593 | if ( pPage->GCPhys != NIL_RTGCPHYS
|
|---|
| 3594 | && pPage->cPresent)
|
|---|
| 3595 | {
|
|---|
| 3596 | switch (pPage->enmKind)
|
|---|
| 3597 | {
|
|---|
| 3598 | /*
|
|---|
| 3599 | * We only care about shadow page tables.
|
|---|
| 3600 | */
|
|---|
| 3601 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 3602 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 3603 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 3604 | {
|
|---|
| 3605 | const uint32_t u32 = (uint32_t)u64;
|
|---|
| 3606 | unsigned cPresent = pPage->cPresent;
|
|---|
| 3607 | PX86PT pPT = (PX86PT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3608 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
|
|---|
| 3609 | {
|
|---|
| 3610 | const X86PGUINT uPte = pPT->a[i].u;
|
|---|
| 3611 | if (uPte & X86_PTE_P)
|
|---|
| 3612 | {
|
|---|
| 3613 | if ((uPte & X86_PTE_PG_MASK) == u32)
|
|---|
| 3614 | {
|
|---|
| 3615 | //Log4(("pgmPoolTrackFlushGCPhysPTsSlow: idx=%d i=%d pte=%RX32\n", iPage, i, pPT->a[i]));
|
|---|
| 3616 | ASMAtomicWriteU32(&pPT->a[i].u, 0);
|
|---|
| 3617 |
|
|---|
| 3618 | /* Update the counter as we're removing references. */
|
|---|
| 3619 | Assert(pPage->cPresent);
|
|---|
| 3620 | Assert(pPool->cPresent);
|
|---|
| 3621 | pPage->cPresent--;
|
|---|
| 3622 | pPool->cPresent--;
|
|---|
| 3623 | }
|
|---|
| 3624 | if (!--cPresent)
|
|---|
| 3625 | break;
|
|---|
| 3626 | }
|
|---|
| 3627 | }
|
|---|
| 3628 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);
|
|---|
| 3629 | break;
|
|---|
| 3630 | }
|
|---|
| 3631 |
|
|---|
| 3632 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 3633 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 3634 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 3635 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 3636 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 3637 | {
|
|---|
| 3638 | unsigned cPresent = pPage->cPresent;
|
|---|
| 3639 | PPGMSHWPTPAE pPT = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3640 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
|
|---|
| 3641 | if (PGMSHWPTEPAE_IS_P(pPT->a[i]))
|
|---|
| 3642 | {
|
|---|
| 3643 | if ((PGMSHWPTEPAE_GET_U(pPT->a[i]) & X86_PTE_PAE_PG_MASK) == u64)
|
|---|
| 3644 | {
|
|---|
| 3645 | //Log4(("pgmPoolTrackFlushGCPhysPTsSlow: idx=%d i=%d pte=%RX64\n", iPage, i, pPT->a[i]));
|
|---|
| 3646 | PGMSHWPTEPAE_ATOMIC_SET(pPT->a[i], 0); /// @todo why not atomic?
|
|---|
| 3647 |
|
|---|
| 3648 | /* Update the counter as we're removing references. */
|
|---|
| 3649 | Assert(pPage->cPresent);
|
|---|
| 3650 | Assert(pPool->cPresent);
|
|---|
| 3651 | pPage->cPresent--;
|
|---|
| 3652 | pPool->cPresent--;
|
|---|
| 3653 | }
|
|---|
| 3654 | if (!--cPresent)
|
|---|
| 3655 | break;
|
|---|
| 3656 | }
|
|---|
| 3657 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);
|
|---|
| 3658 | break;
|
|---|
| 3659 | }
|
|---|
| 3660 |
|
|---|
| 3661 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 3662 | {
|
|---|
| 3663 | unsigned cPresent = pPage->cPresent;
|
|---|
| 3664 | PEPTPT pPT = (PEPTPT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 3665 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
|
|---|
| 3666 | {
|
|---|
| 3667 | X86PGPAEUINT const uPte = pPT->a[i].u;
|
|---|
| 3668 | if (uPte & EPT_E_READ)
|
|---|
| 3669 | {
|
|---|
| 3670 | if ((uPte & EPT_PTE_PG_MASK) == u64)
|
|---|
| 3671 | {
|
|---|
| 3672 | //Log4(("pgmPoolTrackFlushGCPhysPTsSlow: idx=%d i=%d pte=%RX64\n", iPage, i, pPT->a[i]));
|
|---|
| 3673 | ASMAtomicWriteU64(&pPT->a[i].u, 0);
|
|---|
| 3674 |
|
|---|
| 3675 | /* Update the counter as we're removing references. */
|
|---|
| 3676 | Assert(pPage->cPresent);
|
|---|
| 3677 | Assert(pPool->cPresent);
|
|---|
| 3678 | pPage->cPresent--;
|
|---|
| 3679 | pPool->cPresent--;
|
|---|
| 3680 | }
|
|---|
| 3681 | if (!--cPresent)
|
|---|
| 3682 | break;
|
|---|
| 3683 | }
|
|---|
| 3684 | }
|
|---|
| 3685 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pPT);
|
|---|
| 3686 | break;
|
|---|
| 3687 | }
|
|---|
| 3688 | }
|
|---|
| 3689 |
|
|---|
| 3690 | if (!--cLeft)
|
|---|
| 3691 | break;
|
|---|
| 3692 | }
|
|---|
| 3693 | }
|
|---|
| 3694 |
|
|---|
| 3695 | PGM_PAGE_SET_TRACKING(pVM, pPhysPage, 0);
|
|---|
| 3696 | STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTsSlow, s);
|
|---|
| 3697 |
|
|---|
| 3698 | /*
|
|---|
| 3699 | * There is a limit to what makes sense. The above search is very expensive, so force a pgm pool flush.
|
|---|
| 3700 | */
|
|---|
| 3701 | if (pPool->cPresent > 1024)
|
|---|
| 3702 | {
|
|---|
| 3703 | LogFlow(("pgmPoolTrackFlushGCPhysPTsSlow: giving up... (cPresent=%d)\n", pPool->cPresent));
|
|---|
| 3704 | return VINF_PGM_GCPHYS_ALIASED;
|
|---|
| 3705 | }
|
|---|
| 3706 |
|
|---|
| 3707 | return VINF_SUCCESS;
|
|---|
| 3708 | }
|
|---|
| 3709 |
|
|---|
| 3710 |
|
|---|
| 3711 | /**
|
|---|
| 3712 | * Clears the user entry in a user table.
|
|---|
| 3713 | *
|
|---|
| 3714 | * This is used to remove all references to a page when flushing it.
|
|---|
| 3715 | */
|
|---|
| 3716 | static void pgmPoolTrackClearPageUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PCPGMPOOLUSER pUser)
|
|---|
| 3717 | {
|
|---|
| 3718 | Assert(pUser->iUser != NIL_PGMPOOL_IDX);
|
|---|
| 3719 | Assert(pUser->iUser < pPool->cCurPages);
|
|---|
| 3720 | uint32_t iUserTable = pUser->iUserTable;
|
|---|
| 3721 |
|
|---|
| 3722 | /*
|
|---|
| 3723 | * Map the user page. Ignore references made by fictitious pages.
|
|---|
| 3724 | */
|
|---|
| 3725 | PPGMPOOLPAGE pUserPage = &pPool->aPages[pUser->iUser];
|
|---|
| 3726 | LogFlow(("pgmPoolTrackClearPageUser: clear %x in %s (%RGp) (flushing %s)\n", iUserTable, pgmPoolPoolKindToStr(pUserPage->enmKind), pUserPage->Core.Key, pgmPoolPoolKindToStr(pPage->enmKind)));
|
|---|
| 3727 | union
|
|---|
| 3728 | {
|
|---|
| 3729 | uint64_t *pau64;
|
|---|
| 3730 | uint32_t *pau32;
|
|---|
| 3731 | } u;
|
|---|
| 3732 | if (pUserPage->idx < PGMPOOL_IDX_FIRST)
|
|---|
| 3733 | {
|
|---|
| 3734 | Assert(!pUserPage->pvPageR3);
|
|---|
| 3735 | return;
|
|---|
| 3736 | }
|
|---|
| 3737 | u.pau64 = (uint64_t *)PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pUserPage);
|
|---|
| 3738 |
|
|---|
| 3739 |
|
|---|
| 3740 | /* Safety precaution in case we change the paging for other modes too in the future. */
|
|---|
| 3741 | Assert(!pgmPoolIsPageLocked(pPage)); RT_NOREF_PV(pPage);
|
|---|
| 3742 |
|
|---|
| 3743 | #ifdef VBOX_STRICT
|
|---|
| 3744 | /*
|
|---|
| 3745 | * Some sanity checks.
|
|---|
| 3746 | */
|
|---|
| 3747 | switch (pUserPage->enmKind)
|
|---|
| 3748 | {
|
|---|
| 3749 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 3750 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 3751 | Assert(iUserTable < X86_PG_ENTRIES);
|
|---|
| 3752 | break;
|
|---|
| 3753 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 3754 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 3755 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 3756 | Assert(iUserTable < 4);
|
|---|
| 3757 | Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
|
|---|
| 3758 | break;
|
|---|
| 3759 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 3760 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 3761 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 3762 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 3763 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 3764 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 3765 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3766 | break;
|
|---|
| 3767 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 3768 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3769 | break;
|
|---|
| 3770 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 3771 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3772 | Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
|
|---|
| 3773 | break;
|
|---|
| 3774 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 3775 | Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
|
|---|
| 3776 | /* GCPhys >> PAGE_SHIFT is the index here */
|
|---|
| 3777 | break;
|
|---|
| 3778 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 3779 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 3780 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3781 | break;
|
|---|
| 3782 |
|
|---|
| 3783 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 3784 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 3785 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3786 | break;
|
|---|
| 3787 |
|
|---|
| 3788 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 3789 | Assert(iUserTable < X86_PG_PAE_ENTRIES);
|
|---|
| 3790 | break;
|
|---|
| 3791 |
|
|---|
| 3792 | default:
|
|---|
| 3793 | AssertMsgFailed(("enmKind=%d\n", pUserPage->enmKind));
|
|---|
| 3794 | break;
|
|---|
| 3795 | }
|
|---|
| 3796 | #endif /* VBOX_STRICT */
|
|---|
| 3797 |
|
|---|
| 3798 | /*
|
|---|
| 3799 | * Clear the entry in the user page.
|
|---|
| 3800 | */
|
|---|
| 3801 | switch (pUserPage->enmKind)
|
|---|
| 3802 | {
|
|---|
| 3803 | /* 32-bit entries */
|
|---|
| 3804 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 3805 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 3806 | ASMAtomicWriteU32(&u.pau32[iUserTable], 0);
|
|---|
| 3807 | break;
|
|---|
| 3808 |
|
|---|
| 3809 | /* 64-bit entries */
|
|---|
| 3810 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 3811 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 3812 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 3813 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 3814 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 3815 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 3816 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 3817 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 3818 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 3819 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 3820 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 3821 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 3822 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 3823 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 3824 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 3825 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 3826 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 3827 | ASMAtomicWriteU64(&u.pau64[iUserTable], 0);
|
|---|
| 3828 | break;
|
|---|
| 3829 |
|
|---|
| 3830 | default:
|
|---|
| 3831 | AssertFatalMsgFailed(("enmKind=%d iUser=%d iUserTable=%#x\n", pUserPage->enmKind, pUser->iUser, pUser->iUserTable));
|
|---|
| 3832 | }
|
|---|
| 3833 | PGM_DYNMAP_UNUSED_HINT_VM(pPool->CTX_SUFF(pVM), u.pau64);
|
|---|
| 3834 | }
|
|---|
| 3835 |
|
|---|
| 3836 |
|
|---|
| 3837 | /**
|
|---|
| 3838 | * Clears all users of a page.
|
|---|
| 3839 | */
|
|---|
| 3840 | static void pgmPoolTrackClearPageUsers(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 3841 | {
|
|---|
| 3842 | /*
|
|---|
| 3843 | * Free all the user records.
|
|---|
| 3844 | */
|
|---|
| 3845 | LogFlow(("pgmPoolTrackClearPageUsers %RGp\n", pPage->GCPhys));
|
|---|
| 3846 |
|
|---|
| 3847 | PPGMPOOLUSER paUsers = pPool->CTX_SUFF(paUsers);
|
|---|
| 3848 | uint16_t i = pPage->iUserHead;
|
|---|
| 3849 | while (i != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 3850 | {
|
|---|
| 3851 | /* Clear enter in user table. */
|
|---|
| 3852 | pgmPoolTrackClearPageUser(pPool, pPage, &paUsers[i]);
|
|---|
| 3853 |
|
|---|
| 3854 | /* Free it. */
|
|---|
| 3855 | const uint16_t iNext = paUsers[i].iNext;
|
|---|
| 3856 | paUsers[i].iUser = NIL_PGMPOOL_IDX;
|
|---|
| 3857 | paUsers[i].iNext = pPool->iUserFreeHead;
|
|---|
| 3858 | pPool->iUserFreeHead = i;
|
|---|
| 3859 |
|
|---|
| 3860 | /* Next. */
|
|---|
| 3861 | i = iNext;
|
|---|
| 3862 | }
|
|---|
| 3863 | pPage->iUserHead = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 3864 | }
|
|---|
| 3865 |
|
|---|
| 3866 |
|
|---|
| 3867 | /**
|
|---|
| 3868 | * Allocates a new physical cross reference extent.
|
|---|
| 3869 | *
|
|---|
| 3870 | * @returns Pointer to the allocated extent on success. NULL if we're out of them.
|
|---|
| 3871 | * @param pVM The cross context VM structure.
|
|---|
| 3872 | * @param piPhysExt Where to store the phys ext index.
|
|---|
| 3873 | */
|
|---|
| 3874 | PPGMPOOLPHYSEXT pgmPoolTrackPhysExtAlloc(PVMCC pVM, uint16_t *piPhysExt)
|
|---|
| 3875 | {
|
|---|
| 3876 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 3877 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3878 | uint16_t iPhysExt = pPool->iPhysExtFreeHead;
|
|---|
| 3879 | if (iPhysExt == NIL_PGMPOOL_PHYSEXT_INDEX)
|
|---|
| 3880 | {
|
|---|
| 3881 | STAM_COUNTER_INC(&pPool->StamTrackPhysExtAllocFailures);
|
|---|
| 3882 | return NULL;
|
|---|
| 3883 | }
|
|---|
| 3884 | PPGMPOOLPHYSEXT pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
|
|---|
| 3885 | pPool->iPhysExtFreeHead = pPhysExt->iNext;
|
|---|
| 3886 | pPhysExt->iNext = NIL_PGMPOOL_PHYSEXT_INDEX;
|
|---|
| 3887 | *piPhysExt = iPhysExt;
|
|---|
| 3888 | return pPhysExt;
|
|---|
| 3889 | }
|
|---|
| 3890 |
|
|---|
| 3891 |
|
|---|
| 3892 | /**
|
|---|
| 3893 | * Frees a physical cross reference extent.
|
|---|
| 3894 | *
|
|---|
| 3895 | * @param pVM The cross context VM structure.
|
|---|
| 3896 | * @param iPhysExt The extent to free.
|
|---|
| 3897 | */
|
|---|
| 3898 | void pgmPoolTrackPhysExtFree(PVMCC pVM, uint16_t iPhysExt)
|
|---|
| 3899 | {
|
|---|
| 3900 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 3901 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3902 | Assert(iPhysExt < pPool->cMaxPhysExts);
|
|---|
| 3903 | PPGMPOOLPHYSEXT pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
|
|---|
| 3904 | for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
|
|---|
| 3905 | {
|
|---|
| 3906 | pPhysExt->aidx[i] = NIL_PGMPOOL_IDX;
|
|---|
| 3907 | pPhysExt->apte[i] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 3908 | }
|
|---|
| 3909 | pPhysExt->iNext = pPool->iPhysExtFreeHead;
|
|---|
| 3910 | pPool->iPhysExtFreeHead = iPhysExt;
|
|---|
| 3911 | }
|
|---|
| 3912 |
|
|---|
| 3913 |
|
|---|
| 3914 | /**
|
|---|
| 3915 | * Frees a physical cross reference extent.
|
|---|
| 3916 | *
|
|---|
| 3917 | * @param pVM The cross context VM structure.
|
|---|
| 3918 | * @param iPhysExt The extent to free.
|
|---|
| 3919 | */
|
|---|
| 3920 | void pgmPoolTrackPhysExtFreeList(PVMCC pVM, uint16_t iPhysExt)
|
|---|
| 3921 | {
|
|---|
| 3922 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 3923 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3924 |
|
|---|
| 3925 | const uint16_t iPhysExtStart = iPhysExt;
|
|---|
| 3926 | PPGMPOOLPHYSEXT pPhysExt;
|
|---|
| 3927 | do
|
|---|
| 3928 | {
|
|---|
| 3929 | Assert(iPhysExt < pPool->cMaxPhysExts);
|
|---|
| 3930 | pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
|
|---|
| 3931 | for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
|
|---|
| 3932 | {
|
|---|
| 3933 | pPhysExt->aidx[i] = NIL_PGMPOOL_IDX;
|
|---|
| 3934 | pPhysExt->apte[i] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 3935 | }
|
|---|
| 3936 |
|
|---|
| 3937 | /* next */
|
|---|
| 3938 | iPhysExt = pPhysExt->iNext;
|
|---|
| 3939 | } while (iPhysExt != NIL_PGMPOOL_PHYSEXT_INDEX);
|
|---|
| 3940 |
|
|---|
| 3941 | pPhysExt->iNext = pPool->iPhysExtFreeHead;
|
|---|
| 3942 | pPool->iPhysExtFreeHead = iPhysExtStart;
|
|---|
| 3943 | }
|
|---|
| 3944 |
|
|---|
| 3945 |
|
|---|
| 3946 | /**
|
|---|
| 3947 | * Insert a reference into a list of physical cross reference extents.
|
|---|
| 3948 | *
|
|---|
| 3949 | * @returns The new tracking data for PGMPAGE.
|
|---|
| 3950 | *
|
|---|
| 3951 | * @param pVM The cross context VM structure.
|
|---|
| 3952 | * @param iPhysExt The physical extent index of the list head.
|
|---|
| 3953 | * @param iShwPT The shadow page table index.
|
|---|
| 3954 | * @param iPte Page table entry
|
|---|
| 3955 | *
|
|---|
| 3956 | */
|
|---|
| 3957 | static uint16_t pgmPoolTrackPhysExtInsert(PVMCC pVM, uint16_t iPhysExt, uint16_t iShwPT, uint16_t iPte)
|
|---|
| 3958 | {
|
|---|
| 3959 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 3960 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 3961 | PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
|
|---|
| 3962 |
|
|---|
| 3963 | /*
|
|---|
| 3964 | * Special common cases.
|
|---|
| 3965 | */
|
|---|
| 3966 | if (paPhysExts[iPhysExt].aidx[1] == NIL_PGMPOOL_IDX)
|
|---|
| 3967 | {
|
|---|
| 3968 | paPhysExts[iPhysExt].aidx[1] = iShwPT;
|
|---|
| 3969 | paPhysExts[iPhysExt].apte[1] = iPte;
|
|---|
| 3970 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackAliasedMany);
|
|---|
| 3971 | LogFlow(("pgmPoolTrackPhysExtInsert: %d:{,%d pte %d,}\n", iPhysExt, iShwPT, iPte));
|
|---|
| 3972 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExt);
|
|---|
| 3973 | }
|
|---|
| 3974 | if (paPhysExts[iPhysExt].aidx[2] == NIL_PGMPOOL_IDX)
|
|---|
| 3975 | {
|
|---|
| 3976 | paPhysExts[iPhysExt].aidx[2] = iShwPT;
|
|---|
| 3977 | paPhysExts[iPhysExt].apte[2] = iPte;
|
|---|
| 3978 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackAliasedMany);
|
|---|
| 3979 | LogFlow(("pgmPoolTrackPhysExtInsert: %d:{,,%d pte %d}\n", iPhysExt, iShwPT, iPte));
|
|---|
| 3980 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExt);
|
|---|
| 3981 | }
|
|---|
| 3982 | AssertCompile(RT_ELEMENTS(paPhysExts[iPhysExt].aidx) == 3);
|
|---|
| 3983 |
|
|---|
| 3984 | /*
|
|---|
| 3985 | * General treatment.
|
|---|
| 3986 | */
|
|---|
| 3987 | const uint16_t iPhysExtStart = iPhysExt;
|
|---|
| 3988 | unsigned cMax = 15;
|
|---|
| 3989 | for (;;)
|
|---|
| 3990 | {
|
|---|
| 3991 | Assert(iPhysExt < pPool->cMaxPhysExts);
|
|---|
| 3992 | for (unsigned i = 0; i < RT_ELEMENTS(paPhysExts[iPhysExt].aidx); i++)
|
|---|
| 3993 | if (paPhysExts[iPhysExt].aidx[i] == NIL_PGMPOOL_IDX)
|
|---|
| 3994 | {
|
|---|
| 3995 | paPhysExts[iPhysExt].aidx[i] = iShwPT;
|
|---|
| 3996 | paPhysExts[iPhysExt].apte[i] = iPte;
|
|---|
| 3997 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackAliasedMany);
|
|---|
| 3998 | LogFlow(("pgmPoolTrackPhysExtInsert: %d:{%d pte %d} i=%d cMax=%d\n", iPhysExt, iShwPT, iPte, i, cMax));
|
|---|
| 3999 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExtStart);
|
|---|
| 4000 | }
|
|---|
| 4001 | if (!--cMax)
|
|---|
| 4002 | {
|
|---|
| 4003 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackOverflows);
|
|---|
| 4004 | pgmPoolTrackPhysExtFreeList(pVM, iPhysExtStart);
|
|---|
| 4005 | LogFlow(("pgmPoolTrackPhysExtInsert: overflow (1) iShwPT=%d\n", iShwPT));
|
|---|
| 4006 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED);
|
|---|
| 4007 | }
|
|---|
| 4008 |
|
|---|
| 4009 | /* advance */
|
|---|
| 4010 | iPhysExt = paPhysExts[iPhysExt].iNext;
|
|---|
| 4011 | if (iPhysExt == NIL_PGMPOOL_PHYSEXT_INDEX)
|
|---|
| 4012 | break;
|
|---|
| 4013 | }
|
|---|
| 4014 |
|
|---|
| 4015 | /*
|
|---|
| 4016 | * Add another extent to the list.
|
|---|
| 4017 | */
|
|---|
| 4018 | PPGMPOOLPHYSEXT pNew = pgmPoolTrackPhysExtAlloc(pVM, &iPhysExt);
|
|---|
| 4019 | if (!pNew)
|
|---|
| 4020 | {
|
|---|
| 4021 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackNoExtentsLeft);
|
|---|
| 4022 | pgmPoolTrackPhysExtFreeList(pVM, iPhysExtStart);
|
|---|
| 4023 | LogFlow(("pgmPoolTrackPhysExtInsert: pgmPoolTrackPhysExtAlloc failed iShwPT=%d\n", iShwPT));
|
|---|
| 4024 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED);
|
|---|
| 4025 | }
|
|---|
| 4026 | pNew->iNext = iPhysExtStart;
|
|---|
| 4027 | pNew->aidx[0] = iShwPT;
|
|---|
| 4028 | pNew->apte[0] = iPte;
|
|---|
| 4029 | LogFlow(("pgmPoolTrackPhysExtInsert: added new extent %d:{%d pte %d}->%d\n", iPhysExt, iShwPT, iPte, iPhysExtStart));
|
|---|
| 4030 | return PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExt);
|
|---|
| 4031 | }
|
|---|
| 4032 |
|
|---|
| 4033 |
|
|---|
| 4034 | /**
|
|---|
| 4035 | * Add a reference to guest physical page where extents are in use.
|
|---|
| 4036 | *
|
|---|
| 4037 | * @returns The new tracking data for PGMPAGE.
|
|---|
| 4038 | *
|
|---|
| 4039 | * @param pVM The cross context VM structure.
|
|---|
| 4040 | * @param pPhysPage Pointer to the aPages entry in the ram range.
|
|---|
| 4041 | * @param u16 The ram range flags (top 16-bits).
|
|---|
| 4042 | * @param iShwPT The shadow page table index.
|
|---|
| 4043 | * @param iPte Page table entry
|
|---|
| 4044 | */
|
|---|
| 4045 | uint16_t pgmPoolTrackPhysExtAddref(PVMCC pVM, PPGMPAGE pPhysPage, uint16_t u16, uint16_t iShwPT, uint16_t iPte)
|
|---|
| 4046 | {
|
|---|
| 4047 | PGM_LOCK_VOID(pVM);
|
|---|
| 4048 | if (PGMPOOL_TD_GET_CREFS(u16) != PGMPOOL_TD_CREFS_PHYSEXT)
|
|---|
| 4049 | {
|
|---|
| 4050 | /*
|
|---|
| 4051 | * Convert to extent list.
|
|---|
| 4052 | */
|
|---|
| 4053 | Assert(PGMPOOL_TD_GET_CREFS(u16) == 1);
|
|---|
| 4054 | uint16_t iPhysExt;
|
|---|
| 4055 | PPGMPOOLPHYSEXT pPhysExt = pgmPoolTrackPhysExtAlloc(pVM, &iPhysExt);
|
|---|
| 4056 | if (pPhysExt)
|
|---|
| 4057 | {
|
|---|
| 4058 | LogFlow(("pgmPoolTrackPhysExtAddref: new extent: %d:{%d, %d}\n", iPhysExt, PGMPOOL_TD_GET_IDX(u16), iShwPT));
|
|---|
| 4059 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackAliased);
|
|---|
| 4060 | pPhysExt->aidx[0] = PGMPOOL_TD_GET_IDX(u16);
|
|---|
| 4061 | pPhysExt->apte[0] = PGM_PAGE_GET_PTE_INDEX(pPhysPage);
|
|---|
| 4062 | pPhysExt->aidx[1] = iShwPT;
|
|---|
| 4063 | pPhysExt->apte[1] = iPte;
|
|---|
| 4064 | u16 = PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExt);
|
|---|
| 4065 | }
|
|---|
| 4066 | else
|
|---|
| 4067 | u16 = PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED);
|
|---|
| 4068 | }
|
|---|
| 4069 | else if (u16 != PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED))
|
|---|
| 4070 | {
|
|---|
| 4071 | /*
|
|---|
| 4072 | * Insert into the extent list.
|
|---|
| 4073 | */
|
|---|
| 4074 | u16 = pgmPoolTrackPhysExtInsert(pVM, PGMPOOL_TD_GET_IDX(u16), iShwPT, iPte);
|
|---|
| 4075 | }
|
|---|
| 4076 | else
|
|---|
| 4077 | STAM_COUNTER_INC(&pVM->pgm.s.Stats.StatTrackAliasedLots);
|
|---|
| 4078 | PGM_UNLOCK(pVM);
|
|---|
| 4079 | return u16;
|
|---|
| 4080 | }
|
|---|
| 4081 |
|
|---|
| 4082 |
|
|---|
| 4083 | /**
|
|---|
| 4084 | * Clear references to guest physical memory.
|
|---|
| 4085 | *
|
|---|
| 4086 | * @param pPool The pool.
|
|---|
| 4087 | * @param pPage The page.
|
|---|
| 4088 | * @param pPhysPage Pointer to the aPages entry in the ram range.
|
|---|
| 4089 | * @param iPte Shadow PTE index
|
|---|
| 4090 | */
|
|---|
| 4091 | void pgmPoolTrackPhysExtDerefGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMPAGE pPhysPage, uint16_t iPte)
|
|---|
| 4092 | {
|
|---|
| 4093 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4094 | const unsigned cRefs = PGM_PAGE_GET_TD_CREFS(pPhysPage);
|
|---|
| 4095 | AssertFatalMsg(cRefs == PGMPOOL_TD_CREFS_PHYSEXT, ("cRefs=%d pPhysPage=%R[pgmpage] pPage=%p:{.idx=%d}\n", cRefs, pPhysPage, pPage, pPage->idx));
|
|---|
| 4096 |
|
|---|
| 4097 | uint16_t iPhysExt = PGM_PAGE_GET_TD_IDX(pPhysPage);
|
|---|
| 4098 | if (iPhysExt != PGMPOOL_TD_IDX_OVERFLOWED)
|
|---|
| 4099 | {
|
|---|
| 4100 | PGM_LOCK_VOID(pVM);
|
|---|
| 4101 |
|
|---|
| 4102 | uint16_t iPhysExtPrev = NIL_PGMPOOL_PHYSEXT_INDEX;
|
|---|
| 4103 | PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
|
|---|
| 4104 | do
|
|---|
| 4105 | {
|
|---|
| 4106 | Assert(iPhysExt < pPool->cMaxPhysExts);
|
|---|
| 4107 |
|
|---|
| 4108 | /*
|
|---|
| 4109 | * Look for the shadow page and check if it's all freed.
|
|---|
| 4110 | */
|
|---|
| 4111 | for (unsigned i = 0; i < RT_ELEMENTS(paPhysExts[iPhysExt].aidx); i++)
|
|---|
| 4112 | {
|
|---|
| 4113 | if ( paPhysExts[iPhysExt].aidx[i] == pPage->idx
|
|---|
| 4114 | && paPhysExts[iPhysExt].apte[i] == iPte)
|
|---|
| 4115 | {
|
|---|
| 4116 | paPhysExts[iPhysExt].aidx[i] = NIL_PGMPOOL_IDX;
|
|---|
| 4117 | paPhysExts[iPhysExt].apte[i] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 4118 |
|
|---|
| 4119 | for (i = 0; i < RT_ELEMENTS(paPhysExts[iPhysExt].aidx); i++)
|
|---|
| 4120 | if (paPhysExts[iPhysExt].aidx[i] != NIL_PGMPOOL_IDX)
|
|---|
| 4121 | {
|
|---|
| 4122 | Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d\n", pPhysPage, pPage->idx));
|
|---|
| 4123 | PGM_UNLOCK(pVM);
|
|---|
| 4124 | return;
|
|---|
| 4125 | }
|
|---|
| 4126 |
|
|---|
| 4127 | /* we can free the node. */
|
|---|
| 4128 | const uint16_t iPhysExtNext = paPhysExts[iPhysExt].iNext;
|
|---|
| 4129 | if ( iPhysExtPrev == NIL_PGMPOOL_PHYSEXT_INDEX
|
|---|
| 4130 | && iPhysExtNext == NIL_PGMPOOL_PHYSEXT_INDEX)
|
|---|
| 4131 | {
|
|---|
| 4132 | /* lonely node */
|
|---|
| 4133 | pgmPoolTrackPhysExtFree(pVM, iPhysExt);
|
|---|
| 4134 | Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d lonely\n", pPhysPage, pPage->idx));
|
|---|
| 4135 | PGM_PAGE_SET_TRACKING(pVM, pPhysPage, 0);
|
|---|
| 4136 | }
|
|---|
| 4137 | else if (iPhysExtPrev == NIL_PGMPOOL_PHYSEXT_INDEX)
|
|---|
| 4138 | {
|
|---|
| 4139 | /* head */
|
|---|
| 4140 | Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d head\n", pPhysPage, pPage->idx));
|
|---|
| 4141 | PGM_PAGE_SET_TRACKING(pVM, pPhysPage, PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, iPhysExtNext));
|
|---|
| 4142 | pgmPoolTrackPhysExtFree(pVM, iPhysExt);
|
|---|
| 4143 | }
|
|---|
| 4144 | else
|
|---|
| 4145 | {
|
|---|
| 4146 | /* in list */
|
|---|
| 4147 | Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d in list\n", pPhysPage, pPage->idx));
|
|---|
| 4148 | paPhysExts[iPhysExtPrev].iNext = iPhysExtNext;
|
|---|
| 4149 | pgmPoolTrackPhysExtFree(pVM, iPhysExt);
|
|---|
| 4150 | }
|
|---|
| 4151 | iPhysExt = iPhysExtNext;
|
|---|
| 4152 | PGM_UNLOCK(pVM);
|
|---|
| 4153 | return;
|
|---|
| 4154 | }
|
|---|
| 4155 | }
|
|---|
| 4156 |
|
|---|
| 4157 | /* next */
|
|---|
| 4158 | iPhysExtPrev = iPhysExt;
|
|---|
| 4159 | iPhysExt = paPhysExts[iPhysExt].iNext;
|
|---|
| 4160 | } while (iPhysExt != NIL_PGMPOOL_PHYSEXT_INDEX);
|
|---|
| 4161 |
|
|---|
| 4162 | PGM_UNLOCK(pVM);
|
|---|
| 4163 | AssertFatalMsgFailed(("not-found! cRefs=%d pPhysPage=%R[pgmpage] pPage=%p:{.idx=%d}\n", cRefs, pPhysPage, pPage, pPage->idx));
|
|---|
| 4164 | }
|
|---|
| 4165 | else /* nothing to do */
|
|---|
| 4166 | Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage]\n", pPhysPage));
|
|---|
| 4167 | }
|
|---|
| 4168 |
|
|---|
| 4169 | /**
|
|---|
| 4170 | * Clear references to guest physical memory.
|
|---|
| 4171 | *
|
|---|
| 4172 | * This is the same as pgmPoolTracDerefGCPhysHint except that the guest
|
|---|
| 4173 | * physical address is assumed to be correct, so the linear search can be
|
|---|
| 4174 | * skipped and we can assert at an earlier point.
|
|---|
| 4175 | *
|
|---|
| 4176 | * @param pPool The pool.
|
|---|
| 4177 | * @param pPage The page.
|
|---|
| 4178 | * @param HCPhys The host physical address corresponding to the guest page.
|
|---|
| 4179 | * @param GCPhys The guest physical address corresponding to HCPhys.
|
|---|
| 4180 | * @param iPte Shadow PTE index
|
|---|
| 4181 | */
|
|---|
| 4182 | static void pgmPoolTracDerefGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTHCPHYS HCPhys, RTGCPHYS GCPhys, uint16_t iPte)
|
|---|
| 4183 | {
|
|---|
| 4184 | /*
|
|---|
| 4185 | * Lookup the page and check if it checks out before derefing it.
|
|---|
| 4186 | */
|
|---|
| 4187 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4188 | PPGMPAGE pPhysPage = pgmPhysGetPage(pVM, GCPhys);
|
|---|
| 4189 | if (pPhysPage)
|
|---|
| 4190 | {
|
|---|
| 4191 | Assert(PGM_PAGE_GET_HCPHYS(pPhysPage));
|
|---|
| 4192 | #ifdef LOG_ENABLED
|
|---|
| 4193 | RTHCPHYS HCPhysPage = PGM_PAGE_GET_HCPHYS(pPhysPage);
|
|---|
| 4194 | Log2(("pgmPoolTracDerefGCPhys %RHp vs %RHp\n", HCPhysPage, HCPhys));
|
|---|
| 4195 | #endif
|
|---|
| 4196 | if (PGM_PAGE_GET_HCPHYS(pPhysPage) == HCPhys)
|
|---|
| 4197 | {
|
|---|
| 4198 | Assert(pPage->cPresent);
|
|---|
| 4199 | Assert(pPool->cPresent);
|
|---|
| 4200 | pPage->cPresent--;
|
|---|
| 4201 | pPool->cPresent--;
|
|---|
| 4202 | pgmTrackDerefGCPhys(pPool, pPage, pPhysPage, iPte);
|
|---|
| 4203 | return;
|
|---|
| 4204 | }
|
|---|
| 4205 |
|
|---|
| 4206 | AssertFatalMsgFailed(("HCPhys=%RHp GCPhys=%RGp; found page has HCPhys=%RHp\n",
|
|---|
| 4207 | HCPhys, GCPhys, PGM_PAGE_GET_HCPHYS(pPhysPage)));
|
|---|
| 4208 | }
|
|---|
| 4209 | AssertFatalMsgFailed(("HCPhys=%RHp GCPhys=%RGp\n", HCPhys, GCPhys));
|
|---|
| 4210 | }
|
|---|
| 4211 |
|
|---|
| 4212 |
|
|---|
| 4213 | /**
|
|---|
| 4214 | * Clear references to guest physical memory.
|
|---|
| 4215 | *
|
|---|
| 4216 | * @param pPool The pool.
|
|---|
| 4217 | * @param pPage The page.
|
|---|
| 4218 | * @param HCPhys The host physical address corresponding to the guest page.
|
|---|
| 4219 | * @param GCPhysHint The guest physical address which may corresponding to HCPhys.
|
|---|
| 4220 | * @param iPte Shadow pte index
|
|---|
| 4221 | */
|
|---|
| 4222 | void pgmPoolTracDerefGCPhysHint(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTHCPHYS HCPhys, RTGCPHYS GCPhysHint, uint16_t iPte)
|
|---|
| 4223 | {
|
|---|
| 4224 | Log4(("pgmPoolTracDerefGCPhysHint %RHp %RGp\n", HCPhys, GCPhysHint));
|
|---|
| 4225 |
|
|---|
| 4226 | /*
|
|---|
| 4227 | * Try the hint first.
|
|---|
| 4228 | */
|
|---|
| 4229 | RTHCPHYS HCPhysHinted;
|
|---|
| 4230 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4231 | PPGMPAGE pPhysPage = pgmPhysGetPage(pVM, GCPhysHint);
|
|---|
| 4232 | if (pPhysPage)
|
|---|
| 4233 | {
|
|---|
| 4234 | HCPhysHinted = PGM_PAGE_GET_HCPHYS(pPhysPage);
|
|---|
| 4235 | Assert(HCPhysHinted);
|
|---|
| 4236 | if (HCPhysHinted == HCPhys)
|
|---|
| 4237 | {
|
|---|
| 4238 | Assert(pPage->cPresent);
|
|---|
| 4239 | Assert(pPool->cPresent);
|
|---|
| 4240 | pPage->cPresent--;
|
|---|
| 4241 | pPool->cPresent--;
|
|---|
| 4242 | pgmTrackDerefGCPhys(pPool, pPage, pPhysPage, iPte);
|
|---|
| 4243 | return;
|
|---|
| 4244 | }
|
|---|
| 4245 | }
|
|---|
| 4246 | else
|
|---|
| 4247 | HCPhysHinted = UINT64_C(0xdeadbeefdeadbeef);
|
|---|
| 4248 |
|
|---|
| 4249 | /*
|
|---|
| 4250 | * Damn, the hint didn't work. We'll have to do an expensive linear search.
|
|---|
| 4251 | */
|
|---|
| 4252 | STAM_COUNTER_INC(&pPool->StatTrackLinearRamSearches);
|
|---|
| 4253 | PPGMRAMRANGE pRam = pPool->CTX_SUFF(pVM)->pgm.s.CTX_SUFF(pRamRangesX);
|
|---|
| 4254 | while (pRam)
|
|---|
| 4255 | {
|
|---|
| 4256 | unsigned iPage = pRam->cb >> PAGE_SHIFT;
|
|---|
| 4257 | while (iPage-- > 0)
|
|---|
| 4258 | {
|
|---|
| 4259 | if (PGM_PAGE_GET_HCPHYS(&pRam->aPages[iPage]) == HCPhys)
|
|---|
| 4260 | {
|
|---|
| 4261 | Log4(("pgmPoolTracDerefGCPhysHint: Linear HCPhys=%RHp GCPhysHint=%RGp GCPhysReal=%RGp\n",
|
|---|
| 4262 | HCPhys, GCPhysHint, pRam->GCPhys + (iPage << PAGE_SHIFT)));
|
|---|
| 4263 | Assert(pPage->cPresent);
|
|---|
| 4264 | Assert(pPool->cPresent);
|
|---|
| 4265 | pPage->cPresent--;
|
|---|
| 4266 | pPool->cPresent--;
|
|---|
| 4267 | pgmTrackDerefGCPhys(pPool, pPage, &pRam->aPages[iPage], iPte);
|
|---|
| 4268 | return;
|
|---|
| 4269 | }
|
|---|
| 4270 | }
|
|---|
| 4271 | pRam = pRam->CTX_SUFF(pNext);
|
|---|
| 4272 | }
|
|---|
| 4273 |
|
|---|
| 4274 | AssertFatalMsgFailed(("HCPhys=%RHp GCPhysHint=%RGp (Hinted page has HCPhys = %RHp)\n", HCPhys, GCPhysHint, HCPhysHinted));
|
|---|
| 4275 | }
|
|---|
| 4276 |
|
|---|
| 4277 |
|
|---|
| 4278 | /**
|
|---|
| 4279 | * Clear references to guest physical memory in a 32-bit / 32-bit page table.
|
|---|
| 4280 | *
|
|---|
| 4281 | * @param pPool The pool.
|
|---|
| 4282 | * @param pPage The page.
|
|---|
| 4283 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 4284 | * @param pGstPT The guest page table.
|
|---|
| 4285 | */
|
|---|
| 4286 | DECLINLINE(void) pgmPoolTrackDerefPT32Bit32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PT pShwPT, PCX86PT pGstPT)
|
|---|
| 4287 | {
|
|---|
| 4288 | RTGCPHYS32 const fPgMask = pPage->fA20Enabled ? X86_PTE_PG_MASK : X86_PTE_PG_MASK & ~RT_BIT_32(20);
|
|---|
| 4289 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 4290 | {
|
|---|
| 4291 | const X86PGUINT uPte = pShwPT->a[i].u;
|
|---|
| 4292 | Assert(!(uPte & RT_BIT_32(10)));
|
|---|
| 4293 | if (uPte & X86_PTE_P)
|
|---|
| 4294 | {
|
|---|
| 4295 | Log4(("pgmPoolTrackDerefPT32Bit32Bit: i=%d pte=%RX32 hint=%RX32\n",
|
|---|
| 4296 | i, uPte & X86_PTE_PG_MASK, pGstPT->a[i].u & X86_PTE_PG_MASK));
|
|---|
| 4297 | pgmPoolTracDerefGCPhysHint(pPool, pPage, uPte & X86_PTE_PG_MASK, pGstPT->a[i].u & fPgMask, i);
|
|---|
| 4298 | if (!pPage->cPresent)
|
|---|
| 4299 | break;
|
|---|
| 4300 | }
|
|---|
| 4301 | }
|
|---|
| 4302 | }
|
|---|
| 4303 |
|
|---|
| 4304 |
|
|---|
| 4305 | /**
|
|---|
| 4306 | * Clear references to guest physical memory in a PAE / 32-bit page table.
|
|---|
| 4307 | *
|
|---|
| 4308 | * @param pPool The pool.
|
|---|
| 4309 | * @param pPage The page.
|
|---|
| 4310 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 4311 | * @param pGstPT The guest page table (just a half one).
|
|---|
| 4312 | */
|
|---|
| 4313 | DECLINLINE(void) pgmPoolTrackDerefPTPae32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PT pGstPT)
|
|---|
| 4314 | {
|
|---|
| 4315 | RTGCPHYS32 const fPgMask = pPage->fA20Enabled ? X86_PTE_PG_MASK : X86_PTE_PG_MASK & ~RT_BIT_32(20);
|
|---|
| 4316 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 4317 | {
|
|---|
| 4318 | Assert( (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == 0
|
|---|
| 4319 | || (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == UINT64_C(0x7ff0000000000000));
|
|---|
| 4320 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 4321 | {
|
|---|
| 4322 | Log4(("pgmPoolTrackDerefPTPae32Bit: i=%d pte=%RX64 hint=%RX32\n",
|
|---|
| 4323 | i, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pGstPT->a[i].u & X86_PTE_PG_MASK));
|
|---|
| 4324 | pgmPoolTracDerefGCPhysHint(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pGstPT->a[i].u & fPgMask, i);
|
|---|
| 4325 | if (!pPage->cPresent)
|
|---|
| 4326 | break;
|
|---|
| 4327 | }
|
|---|
| 4328 | }
|
|---|
| 4329 | }
|
|---|
| 4330 |
|
|---|
| 4331 |
|
|---|
| 4332 | /**
|
|---|
| 4333 | * Clear references to guest physical memory in a PAE / PAE page table.
|
|---|
| 4334 | *
|
|---|
| 4335 | * @param pPool The pool.
|
|---|
| 4336 | * @param pPage The page.
|
|---|
| 4337 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 4338 | * @param pGstPT The guest page table.
|
|---|
| 4339 | */
|
|---|
| 4340 | DECLINLINE(void) pgmPoolTrackDerefPTPaePae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT, PCX86PTPAE pGstPT)
|
|---|
| 4341 | {
|
|---|
| 4342 | RTGCPHYS const fPgMask = pPage->fA20Enabled ? X86_PTE_PAE_PG_MASK : X86_PTE_PAE_PG_MASK & ~RT_BIT_64(20);
|
|---|
| 4343 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++)
|
|---|
| 4344 | {
|
|---|
| 4345 | Assert( (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == 0
|
|---|
| 4346 | || (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == UINT64_C(0x7ff0000000000000));
|
|---|
| 4347 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 4348 | {
|
|---|
| 4349 | Log4(("pgmPoolTrackDerefPTPaePae: i=%d pte=%RX32 hint=%RX32\n",
|
|---|
| 4350 | i, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pGstPT->a[i].u & X86_PTE_PAE_PG_MASK));
|
|---|
| 4351 | pgmPoolTracDerefGCPhysHint(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), pGstPT->a[i].u & fPgMask, i);
|
|---|
| 4352 | if (!pPage->cPresent)
|
|---|
| 4353 | break;
|
|---|
| 4354 | }
|
|---|
| 4355 | }
|
|---|
| 4356 | }
|
|---|
| 4357 |
|
|---|
| 4358 |
|
|---|
| 4359 | /**
|
|---|
| 4360 | * Clear references to guest physical memory in a 32-bit / 4MB page table.
|
|---|
| 4361 | *
|
|---|
| 4362 | * @param pPool The pool.
|
|---|
| 4363 | * @param pPage The page.
|
|---|
| 4364 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 4365 | */
|
|---|
| 4366 | DECLINLINE(void) pgmPoolTrackDerefPT32Bit4MB(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PT pShwPT)
|
|---|
| 4367 | {
|
|---|
| 4368 | RTGCPHYS const GCPhysA20Mask = pPage->fA20Enabled ? UINT64_MAX : ~RT_BIT_64(20);
|
|---|
| 4369 | RTGCPHYS GCPhys = pPage->GCPhys + PAGE_SIZE * pPage->iFirstPresent;
|
|---|
| 4370 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++, GCPhys += PAGE_SIZE)
|
|---|
| 4371 | {
|
|---|
| 4372 | const X86PGUINT uPte = pShwPT->a[i].u;
|
|---|
| 4373 | Assert(!(uPte & RT_BIT_32(10)));
|
|---|
| 4374 | if (uPte & X86_PTE_P)
|
|---|
| 4375 | {
|
|---|
| 4376 | Log4(("pgmPoolTrackDerefPT32Bit4MB: i=%d pte=%RX32 GCPhys=%RGp\n",
|
|---|
| 4377 | i, uPte & X86_PTE_PG_MASK, GCPhys));
|
|---|
| 4378 | pgmPoolTracDerefGCPhys(pPool, pPage, uPte & X86_PTE_PG_MASK, GCPhys & GCPhysA20Mask, i);
|
|---|
| 4379 | if (!pPage->cPresent)
|
|---|
| 4380 | break;
|
|---|
| 4381 | }
|
|---|
| 4382 | }
|
|---|
| 4383 | }
|
|---|
| 4384 |
|
|---|
| 4385 |
|
|---|
| 4386 | /**
|
|---|
| 4387 | * Clear references to guest physical memory in a PAE / 2/4MB page table.
|
|---|
| 4388 | *
|
|---|
| 4389 | * @param pPool The pool.
|
|---|
| 4390 | * @param pPage The page.
|
|---|
| 4391 | * @param pShwPT The shadow page table (mapping of the page).
|
|---|
| 4392 | */
|
|---|
| 4393 | DECLINLINE(void) pgmPoolTrackDerefPTPaeBig(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PPGMSHWPTPAE pShwPT)
|
|---|
| 4394 | {
|
|---|
| 4395 | RTGCPHYS const GCPhysA20Mask = pPage->fA20Enabled ? UINT64_MAX : ~RT_BIT_64(20);
|
|---|
| 4396 | RTGCPHYS GCPhys = pPage->GCPhys + PAGE_SIZE * pPage->iFirstPresent;
|
|---|
| 4397 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++, GCPhys += PAGE_SIZE)
|
|---|
| 4398 | {
|
|---|
| 4399 | Assert( (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == 0
|
|---|
| 4400 | || (PGMSHWPTEPAE_GET_U(pShwPT->a[i]) & UINT64_C(0x7ff0000000000400)) == UINT64_C(0x7ff0000000000000));
|
|---|
| 4401 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[i]))
|
|---|
| 4402 | {
|
|---|
| 4403 | Log4(("pgmPoolTrackDerefPTPaeBig: i=%d pte=%RX64 hint=%RGp\n",
|
|---|
| 4404 | i, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), GCPhys));
|
|---|
| 4405 | pgmPoolTracDerefGCPhys(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[i]), GCPhys & GCPhysA20Mask, i);
|
|---|
| 4406 | if (!pPage->cPresent)
|
|---|
| 4407 | break;
|
|---|
| 4408 | }
|
|---|
| 4409 | }
|
|---|
| 4410 | }
|
|---|
| 4411 |
|
|---|
| 4412 |
|
|---|
| 4413 | /**
|
|---|
| 4414 | * Clear references to shadowed pages in an EPT page table.
|
|---|
| 4415 | *
|
|---|
| 4416 | * @param pPool The pool.
|
|---|
| 4417 | * @param pPage The page.
|
|---|
| 4418 | * @param pShwPT The shadow page directory pointer table (mapping of the
|
|---|
| 4419 | * page).
|
|---|
| 4420 | */
|
|---|
| 4421 | DECLINLINE(void) pgmPoolTrackDerefPTEPT(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PEPTPT pShwPT)
|
|---|
| 4422 | {
|
|---|
| 4423 | RTGCPHYS const GCPhysA20Mask = pPage->fA20Enabled ? UINT64_MAX : ~RT_BIT_64(20);
|
|---|
| 4424 | RTGCPHYS GCPhys = pPage->GCPhys + PAGE_SIZE * pPage->iFirstPresent;
|
|---|
| 4425 | for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pShwPT->a); i++, GCPhys += PAGE_SIZE)
|
|---|
| 4426 | {
|
|---|
| 4427 | X86PGPAEUINT const uPte = pShwPT->a[i].u;
|
|---|
| 4428 | Assert((uPte & UINT64_C(0xfff0000000000f80)) == 0);
|
|---|
| 4429 | if (uPte & EPT_E_READ)
|
|---|
| 4430 | {
|
|---|
| 4431 | Log4(("pgmPoolTrackDerefPTEPT: i=%d pte=%RX64 GCPhys=%RX64\n",
|
|---|
| 4432 | i, uPte & EPT_PTE_PG_MASK, pPage->GCPhys));
|
|---|
| 4433 | pgmPoolTracDerefGCPhys(pPool, pPage, uPte & EPT_PTE_PG_MASK, GCPhys & GCPhysA20Mask, i);
|
|---|
| 4434 | if (!pPage->cPresent)
|
|---|
| 4435 | break;
|
|---|
| 4436 | }
|
|---|
| 4437 | }
|
|---|
| 4438 | }
|
|---|
| 4439 |
|
|---|
| 4440 |
|
|---|
| 4441 | /**
|
|---|
| 4442 | * Clear references to shadowed pages in a 32 bits page directory.
|
|---|
| 4443 | *
|
|---|
| 4444 | * @param pPool The pool.
|
|---|
| 4445 | * @param pPage The page.
|
|---|
| 4446 | * @param pShwPD The shadow page directory (mapping of the page).
|
|---|
| 4447 | */
|
|---|
| 4448 | DECLINLINE(void) pgmPoolTrackDerefPD(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PD pShwPD)
|
|---|
| 4449 | {
|
|---|
| 4450 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPD->a); i++)
|
|---|
| 4451 | {
|
|---|
| 4452 | X86PGUINT const uPde = pShwPD->a[i].u;
|
|---|
| 4453 | if (uPde & X86_PDE_P)
|
|---|
| 4454 | {
|
|---|
| 4455 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPD->a[i].u & X86_PDE_PG_MASK);
|
|---|
| 4456 | if (pSubPage)
|
|---|
| 4457 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4458 | else
|
|---|
| 4459 | AssertFatalMsgFailed(("%x\n", pShwPD->a[i].u & X86_PDE_PG_MASK));
|
|---|
| 4460 | }
|
|---|
| 4461 | }
|
|---|
| 4462 | }
|
|---|
| 4463 |
|
|---|
| 4464 |
|
|---|
| 4465 | /**
|
|---|
| 4466 | * Clear references to shadowed pages in a PAE (legacy or 64 bits) page directory.
|
|---|
| 4467 | *
|
|---|
| 4468 | * @param pPool The pool.
|
|---|
| 4469 | * @param pPage The page.
|
|---|
| 4470 | * @param pShwPD The shadow page directory (mapping of the page).
|
|---|
| 4471 | */
|
|---|
| 4472 | DECLINLINE(void) pgmPoolTrackDerefPDPae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PDPAE pShwPD)
|
|---|
| 4473 | {
|
|---|
| 4474 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPD->a); i++)
|
|---|
| 4475 | {
|
|---|
| 4476 | X86PGPAEUINT const uPde = pShwPD->a[i].u;
|
|---|
| 4477 | if (uPde & X86_PDE_P)
|
|---|
| 4478 | {
|
|---|
| 4479 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 4480 | if (uPde & X86_PDE_PS)
|
|---|
| 4481 | {
|
|---|
| 4482 | Log4(("pgmPoolTrackDerefPDPae: i=%d pde=%RX64 GCPhys=%RX64\n",
|
|---|
| 4483 | i, uPde & X86_PDE2M_PAE_PG_MASK, pPage->GCPhys));
|
|---|
| 4484 | pgmPoolTracDerefGCPhys(pPool, pPage, uPde & X86_PDE2M_PAE_PG_MASK,
|
|---|
| 4485 | pPage->GCPhys + i * 2 * _1M /* pPage->GCPhys = base address of the memory described by the PD */,
|
|---|
| 4486 | i);
|
|---|
| 4487 | }
|
|---|
| 4488 | else
|
|---|
| 4489 | #endif
|
|---|
| 4490 | {
|
|---|
| 4491 | Assert((uPde & (X86_PDE_PAE_MBZ_MASK_NX | UINT64_C(0x7ff0000000000000))) == 0);
|
|---|
| 4492 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPde & X86_PDE_PAE_PG_MASK);
|
|---|
| 4493 | if (pSubPage)
|
|---|
| 4494 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4495 | else
|
|---|
| 4496 | AssertFatalMsgFailed(("%RX64\n", uPde & X86_PDE_PAE_PG_MASK));
|
|---|
| 4497 | /** @todo 64-bit guests: have to ensure that we're not exhausting the dynamic mappings! */
|
|---|
| 4498 | }
|
|---|
| 4499 | }
|
|---|
| 4500 | }
|
|---|
| 4501 | }
|
|---|
| 4502 |
|
|---|
| 4503 |
|
|---|
| 4504 | /**
|
|---|
| 4505 | * Clear references to shadowed pages in a PAE page directory pointer table.
|
|---|
| 4506 | *
|
|---|
| 4507 | * @param pPool The pool.
|
|---|
| 4508 | * @param pPage The page.
|
|---|
| 4509 | * @param pShwPDPT The shadow page directory pointer table (mapping of the page).
|
|---|
| 4510 | */
|
|---|
| 4511 | DECLINLINE(void) pgmPoolTrackDerefPDPTPae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PDPT pShwPDPT)
|
|---|
| 4512 | {
|
|---|
| 4513 | for (unsigned i = 0; i < X86_PG_PAE_PDPE_ENTRIES; i++)
|
|---|
| 4514 | {
|
|---|
| 4515 | X86PGPAEUINT const uPdpe = pShwPDPT->a[i].u;
|
|---|
| 4516 | Assert((uPdpe & (X86_PDPE_PAE_MBZ_MASK | UINT64_C(0x7ff0000000000200))) == 0);
|
|---|
| 4517 | if (uPdpe & X86_PDPE_P)
|
|---|
| 4518 | {
|
|---|
| 4519 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPdpe & X86_PDPE_PG_MASK);
|
|---|
| 4520 | if (pSubPage)
|
|---|
| 4521 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4522 | else
|
|---|
| 4523 | AssertFatalMsgFailed(("%RX64\n", uPdpe & X86_PDPE_PG_MASK));
|
|---|
| 4524 | }
|
|---|
| 4525 | }
|
|---|
| 4526 | }
|
|---|
| 4527 |
|
|---|
| 4528 |
|
|---|
| 4529 | /**
|
|---|
| 4530 | * Clear references to shadowed pages in a 64-bit page directory pointer table.
|
|---|
| 4531 | *
|
|---|
| 4532 | * @param pPool The pool.
|
|---|
| 4533 | * @param pPage The page.
|
|---|
| 4534 | * @param pShwPDPT The shadow page directory pointer table (mapping of the page).
|
|---|
| 4535 | */
|
|---|
| 4536 | DECLINLINE(void) pgmPoolTrackDerefPDPT64Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PDPT pShwPDPT)
|
|---|
| 4537 | {
|
|---|
| 4538 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPDPT->a); i++)
|
|---|
| 4539 | {
|
|---|
| 4540 | X86PGPAEUINT const uPdpe = pShwPDPT->a[i].u;
|
|---|
| 4541 | Assert((uPdpe & (X86_PDPE_LM_MBZ_MASK_NX | UINT64_C(0x7ff0000000000200))) == 0);
|
|---|
| 4542 | if (uPdpe & X86_PDPE_P)
|
|---|
| 4543 | {
|
|---|
| 4544 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPdpe & X86_PDPE_PG_MASK);
|
|---|
| 4545 | if (pSubPage)
|
|---|
| 4546 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4547 | else
|
|---|
| 4548 | AssertFatalMsgFailed(("%RX64\n", uPdpe & X86_PDPE_PG_MASK));
|
|---|
| 4549 | /** @todo 64-bit guests: have to ensure that we're not exhausting the dynamic mappings! */
|
|---|
| 4550 | }
|
|---|
| 4551 | }
|
|---|
| 4552 | }
|
|---|
| 4553 |
|
|---|
| 4554 |
|
|---|
| 4555 | /**
|
|---|
| 4556 | * Clear references to shadowed pages in a 64-bit level 4 page table.
|
|---|
| 4557 | *
|
|---|
| 4558 | * @param pPool The pool.
|
|---|
| 4559 | * @param pPage The page.
|
|---|
| 4560 | * @param pShwPML4 The shadow page directory pointer table (mapping of the page).
|
|---|
| 4561 | */
|
|---|
| 4562 | DECLINLINE(void) pgmPoolTrackDerefPML464Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PML4 pShwPML4)
|
|---|
| 4563 | {
|
|---|
| 4564 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPML4->a); i++)
|
|---|
| 4565 | {
|
|---|
| 4566 | X86PGPAEUINT const uPml4e = pShwPML4->a[i].u;
|
|---|
| 4567 | Assert((uPml4e & (X86_PML4E_MBZ_MASK_NX | UINT64_C(0x7ff0000000000200))) == 0);
|
|---|
| 4568 | if (uPml4e & X86_PML4E_P)
|
|---|
| 4569 | {
|
|---|
| 4570 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPml4e & X86_PDPE_PG_MASK);
|
|---|
| 4571 | if (pSubPage)
|
|---|
| 4572 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4573 | else
|
|---|
| 4574 | AssertFatalMsgFailed(("%RX64\n", uPml4e & X86_PML4E_PG_MASK));
|
|---|
| 4575 | /** @todo 64-bit guests: have to ensure that we're not exhausting the dynamic mappings! */
|
|---|
| 4576 | }
|
|---|
| 4577 | }
|
|---|
| 4578 | }
|
|---|
| 4579 |
|
|---|
| 4580 |
|
|---|
| 4581 | /**
|
|---|
| 4582 | * Clear references to shadowed pages in an EPT page directory.
|
|---|
| 4583 | *
|
|---|
| 4584 | * @param pPool The pool.
|
|---|
| 4585 | * @param pPage The page.
|
|---|
| 4586 | * @param pShwPD The shadow page directory (mapping of the page).
|
|---|
| 4587 | */
|
|---|
| 4588 | DECLINLINE(void) pgmPoolTrackDerefPDEPT(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PEPTPD pShwPD)
|
|---|
| 4589 | {
|
|---|
| 4590 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPD->a); i++)
|
|---|
| 4591 | {
|
|---|
| 4592 | X86PGPAEUINT const uPde = pShwPD->a[i].u;
|
|---|
| 4593 | Assert((uPde & UINT64_C(0xfff0000000000f80)) == 0);
|
|---|
| 4594 | if (uPde & EPT_E_READ)
|
|---|
| 4595 | {
|
|---|
| 4596 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 4597 | if (uPde & EPT_E_LEAF)
|
|---|
| 4598 | {
|
|---|
| 4599 | Log4(("pgmPoolTrackDerefPDEPT: i=%d pde=%RX64 GCPhys=%RX64\n",
|
|---|
| 4600 | i, uPde & EPT_PDE2M_PG_MASK, pPage->GCPhys));
|
|---|
| 4601 | pgmPoolTracDerefGCPhys(pPool, pPage, uPde & EPT_PDE2M_PG_MASK,
|
|---|
| 4602 | pPage->GCPhys + i * 2 * _1M /* pPage->GCPhys = base address of the memory described by the PD */,
|
|---|
| 4603 | i);
|
|---|
| 4604 | }
|
|---|
| 4605 | else
|
|---|
| 4606 | #endif
|
|---|
| 4607 | {
|
|---|
| 4608 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPde & EPT_PDE_PG_MASK);
|
|---|
| 4609 | if (pSubPage)
|
|---|
| 4610 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4611 | else
|
|---|
| 4612 | AssertFatalMsgFailed(("%RX64\n", pShwPD->a[i].u & EPT_PDE_PG_MASK));
|
|---|
| 4613 | }
|
|---|
| 4614 | /** @todo 64-bit guests: have to ensure that we're not exhausting the dynamic mappings! */
|
|---|
| 4615 | }
|
|---|
| 4616 | }
|
|---|
| 4617 | }
|
|---|
| 4618 |
|
|---|
| 4619 |
|
|---|
| 4620 | /**
|
|---|
| 4621 | * Clear references to shadowed pages in an EPT page directory pointer table.
|
|---|
| 4622 | *
|
|---|
| 4623 | * @param pPool The pool.
|
|---|
| 4624 | * @param pPage The page.
|
|---|
| 4625 | * @param pShwPDPT The shadow page directory pointer table (mapping of the page).
|
|---|
| 4626 | */
|
|---|
| 4627 | DECLINLINE(void) pgmPoolTrackDerefPDPTEPT(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PEPTPDPT pShwPDPT)
|
|---|
| 4628 | {
|
|---|
| 4629 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPDPT->a); i++)
|
|---|
| 4630 | {
|
|---|
| 4631 | X86PGPAEUINT const uPdpe = pShwPDPT->a[i].u;
|
|---|
| 4632 | Assert((uPdpe & UINT64_C(0xfff0000000000f80)) == 0);
|
|---|
| 4633 | if (uPdpe & EPT_E_READ)
|
|---|
| 4634 | {
|
|---|
| 4635 | PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, uPdpe & EPT_PDPTE_PG_MASK);
|
|---|
| 4636 | if (pSubPage)
|
|---|
| 4637 | pgmPoolTrackFreeUser(pPool, pSubPage, pPage->idx, i);
|
|---|
| 4638 | else
|
|---|
| 4639 | AssertFatalMsgFailed(("%RX64\n", uPdpe & EPT_PDPTE_PG_MASK));
|
|---|
| 4640 | /** @todo 64-bit guests: have to ensure that we're not exhausting the dynamic mappings! */
|
|---|
| 4641 | }
|
|---|
| 4642 | }
|
|---|
| 4643 | }
|
|---|
| 4644 |
|
|---|
| 4645 |
|
|---|
| 4646 | /**
|
|---|
| 4647 | * Clears all references made by this page.
|
|---|
| 4648 | *
|
|---|
| 4649 | * This includes other shadow pages and GC physical addresses.
|
|---|
| 4650 | *
|
|---|
| 4651 | * @param pPool The pool.
|
|---|
| 4652 | * @param pPage The page.
|
|---|
| 4653 | */
|
|---|
| 4654 | static void pgmPoolTrackDeref(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 4655 | {
|
|---|
| 4656 | /*
|
|---|
| 4657 | * Map the shadow page and take action according to the page kind.
|
|---|
| 4658 | */
|
|---|
| 4659 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4660 | void *pvShw = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 4661 | switch (pPage->enmKind)
|
|---|
| 4662 | {
|
|---|
| 4663 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 4664 | {
|
|---|
| 4665 | STAM_PROFILE_START(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4666 | void *pvGst;
|
|---|
| 4667 | int rc = PGM_GCPHYS_2_PTR(pVM, pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 4668 | pgmPoolTrackDerefPT32Bit32Bit(pPool, pPage, (PX86PT)pvShw, (PCX86PT)pvGst);
|
|---|
| 4669 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 4670 | STAM_PROFILE_STOP(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4671 | break;
|
|---|
| 4672 | }
|
|---|
| 4673 |
|
|---|
| 4674 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 4675 | {
|
|---|
| 4676 | STAM_PROFILE_START(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4677 | void *pvGst;
|
|---|
| 4678 | int rc = PGM_GCPHYS_2_PTR_EX(pVM, pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 4679 | pgmPoolTrackDerefPTPae32Bit(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PT)pvGst);
|
|---|
| 4680 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 4681 | STAM_PROFILE_STOP(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4682 | break;
|
|---|
| 4683 | }
|
|---|
| 4684 |
|
|---|
| 4685 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 4686 | {
|
|---|
| 4687 | STAM_PROFILE_START(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4688 | void *pvGst;
|
|---|
| 4689 | int rc = PGM_GCPHYS_2_PTR(pVM, pPage->GCPhys, &pvGst); AssertReleaseRC(rc);
|
|---|
| 4690 | pgmPoolTrackDerefPTPaePae(pPool, pPage, (PPGMSHWPTPAE)pvShw, (PCX86PTPAE)pvGst);
|
|---|
| 4691 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvGst);
|
|---|
| 4692 | STAM_PROFILE_STOP(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4693 | break;
|
|---|
| 4694 | }
|
|---|
| 4695 |
|
|---|
| 4696 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS: /* treat it like a 4 MB page */
|
|---|
| 4697 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 4698 | {
|
|---|
| 4699 | STAM_PROFILE_START(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4700 | pgmPoolTrackDerefPT32Bit4MB(pPool, pPage, (PX86PT)pvShw);
|
|---|
| 4701 | STAM_PROFILE_STOP(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4702 | break;
|
|---|
| 4703 | }
|
|---|
| 4704 |
|
|---|
| 4705 | case PGMPOOLKIND_PAE_PT_FOR_PHYS: /* treat it like a 2 MB page */
|
|---|
| 4706 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 4707 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 4708 | {
|
|---|
| 4709 | STAM_PROFILE_START(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4710 | pgmPoolTrackDerefPTPaeBig(pPool, pPage, (PPGMSHWPTPAE)pvShw);
|
|---|
| 4711 | STAM_PROFILE_STOP(&pPool->StatTrackDerefGCPhys, g);
|
|---|
| 4712 | break;
|
|---|
| 4713 | }
|
|---|
| 4714 |
|
|---|
| 4715 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 4716 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 4717 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 4718 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 4719 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 4720 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 4721 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 4722 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 4723 | pgmPoolTrackDerefPDPae(pPool, pPage, (PX86PDPAE)pvShw);
|
|---|
| 4724 | break;
|
|---|
| 4725 |
|
|---|
| 4726 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 4727 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 4728 | pgmPoolTrackDerefPD(pPool, pPage, (PX86PD)pvShw);
|
|---|
| 4729 | break;
|
|---|
| 4730 |
|
|---|
| 4731 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 4732 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 4733 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 4734 | pgmPoolTrackDerefPDPTPae(pPool, pPage, (PX86PDPT)pvShw);
|
|---|
| 4735 | break;
|
|---|
| 4736 |
|
|---|
| 4737 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 4738 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 4739 | pgmPoolTrackDerefPDPT64Bit(pPool, pPage, (PX86PDPT)pvShw);
|
|---|
| 4740 | break;
|
|---|
| 4741 |
|
|---|
| 4742 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 4743 | pgmPoolTrackDerefPML464Bit(pPool, pPage, (PX86PML4)pvShw);
|
|---|
| 4744 | break;
|
|---|
| 4745 |
|
|---|
| 4746 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 4747 | pgmPoolTrackDerefPTEPT(pPool, pPage, (PEPTPT)pvShw);
|
|---|
| 4748 | break;
|
|---|
| 4749 |
|
|---|
| 4750 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 4751 | pgmPoolTrackDerefPDEPT(pPool, pPage, (PEPTPD)pvShw);
|
|---|
| 4752 | break;
|
|---|
| 4753 |
|
|---|
| 4754 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 4755 | pgmPoolTrackDerefPDPTEPT(pPool, pPage, (PEPTPDPT)pvShw);
|
|---|
| 4756 | break;
|
|---|
| 4757 |
|
|---|
| 4758 | default:
|
|---|
| 4759 | AssertFatalMsgFailed(("enmKind=%d\n", pPage->enmKind));
|
|---|
| 4760 | }
|
|---|
| 4761 |
|
|---|
| 4762 | /* paranoia, clear the shadow page. Remove this laser (i.e. let Alloc and ClearAll do it). */
|
|---|
| 4763 | STAM_PROFILE_START(&pPool->StatZeroPage, z);
|
|---|
| 4764 | ASMMemZeroPage(pvShw);
|
|---|
| 4765 | STAM_PROFILE_STOP(&pPool->StatZeroPage, z);
|
|---|
| 4766 | pPage->fZeroed = true;
|
|---|
| 4767 | Assert(!pPage->cPresent);
|
|---|
| 4768 | PGM_DYNMAP_UNUSED_HINT_VM(pVM, pvShw);
|
|---|
| 4769 | }
|
|---|
| 4770 |
|
|---|
| 4771 |
|
|---|
| 4772 | /**
|
|---|
| 4773 | * Flushes a pool page.
|
|---|
| 4774 | *
|
|---|
| 4775 | * This moves the page to the free list after removing all user references to it.
|
|---|
| 4776 | *
|
|---|
| 4777 | * @returns VBox status code.
|
|---|
| 4778 | * @retval VINF_SUCCESS on success.
|
|---|
| 4779 | * @param pPool The pool.
|
|---|
| 4780 | * @param pPage The shadow page.
|
|---|
| 4781 | * @param fFlush Flush the TLBS when required (should only be false in very specific use cases!!)
|
|---|
| 4782 | */
|
|---|
| 4783 | int pgmPoolFlushPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage, bool fFlush)
|
|---|
| 4784 | {
|
|---|
| 4785 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4786 | bool fFlushRequired = false;
|
|---|
| 4787 |
|
|---|
| 4788 | int rc = VINF_SUCCESS;
|
|---|
| 4789 | STAM_PROFILE_START(&pPool->StatFlushPage, f);
|
|---|
| 4790 | LogFlow(("pgmPoolFlushPage: pPage=%p:{.Key=%RHp, .idx=%d, .enmKind=%s, .GCPhys=%RGp}\n",
|
|---|
| 4791 | pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), pPage->GCPhys));
|
|---|
| 4792 |
|
|---|
| 4793 | /*
|
|---|
| 4794 | * Reject any attempts at flushing any of the special root pages (shall
|
|---|
| 4795 | * not happen).
|
|---|
| 4796 | */
|
|---|
| 4797 | AssertMsgReturn(pPage->idx >= PGMPOOL_IDX_FIRST,
|
|---|
| 4798 | ("pgmPoolFlushPage: special root page, rejected. enmKind=%s idx=%d\n",
|
|---|
| 4799 | pgmPoolPoolKindToStr(pPage->enmKind), pPage->idx),
|
|---|
| 4800 | VINF_SUCCESS);
|
|---|
| 4801 |
|
|---|
| 4802 | PGM_LOCK_VOID(pVM);
|
|---|
| 4803 |
|
|---|
| 4804 | /*
|
|---|
| 4805 | * Quietly reject any attempts at flushing the currently active shadow CR3 mapping
|
|---|
| 4806 | */
|
|---|
| 4807 | if (pgmPoolIsPageLocked(pPage))
|
|---|
| 4808 | {
|
|---|
| 4809 | AssertMsg( pPage->enmKind == PGMPOOLKIND_64BIT_PML4
|
|---|
| 4810 | || pPage->enmKind == PGMPOOLKIND_PAE_PDPT
|
|---|
| 4811 | || pPage->enmKind == PGMPOOLKIND_PAE_PDPT_FOR_32BIT
|
|---|
| 4812 | || pPage->enmKind == PGMPOOLKIND_32BIT_PD
|
|---|
| 4813 | || pPage->enmKind == PGMPOOLKIND_PAE_PD_FOR_PAE_PD
|
|---|
| 4814 | || pPage->enmKind == PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD
|
|---|
| 4815 | || pPage->enmKind == PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD
|
|---|
| 4816 | || pPage->enmKind == PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD
|
|---|
| 4817 | || pPage->enmKind == PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD
|
|---|
| 4818 | || pPage->enmKind == PGMPOOLKIND_ROOT_NESTED,
|
|---|
| 4819 | ("Can't free the shadow CR3! (%RHp vs %RHp kind=%d\n", PGMGetHyperCR3(VMMGetCpu(pVM)), pPage->Core.Key, pPage->enmKind));
|
|---|
| 4820 | Log(("pgmPoolFlushPage: current active shadow CR3, rejected. enmKind=%s idx=%d\n", pgmPoolPoolKindToStr(pPage->enmKind), pPage->idx));
|
|---|
| 4821 | PGM_UNLOCK(pVM);
|
|---|
| 4822 | return VINF_SUCCESS;
|
|---|
| 4823 | }
|
|---|
| 4824 |
|
|---|
| 4825 | /*
|
|---|
| 4826 | * Mark the page as being in need of an ASMMemZeroPage().
|
|---|
| 4827 | */
|
|---|
| 4828 | pPage->fZeroed = false;
|
|---|
| 4829 |
|
|---|
| 4830 | #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 4831 | if (pPage->fDirty)
|
|---|
| 4832 | pgmPoolFlushDirtyPage(pVM, pPool, pPage->idxDirtyEntry, false /* do not remove */);
|
|---|
| 4833 | #endif
|
|---|
| 4834 |
|
|---|
| 4835 | /* If there are any users of this table, then we *must* issue a tlb flush on all VCPUs. */
|
|---|
| 4836 | if (pPage->iUserHead != NIL_PGMPOOL_USER_INDEX)
|
|---|
| 4837 | fFlushRequired = true;
|
|---|
| 4838 |
|
|---|
| 4839 | /*
|
|---|
| 4840 | * Clear the page.
|
|---|
| 4841 | */
|
|---|
| 4842 | pgmPoolTrackClearPageUsers(pPool, pPage);
|
|---|
| 4843 | STAM_PROFILE_START(&pPool->StatTrackDeref,a);
|
|---|
| 4844 | pgmPoolTrackDeref(pPool, pPage);
|
|---|
| 4845 | STAM_PROFILE_STOP(&pPool->StatTrackDeref,a);
|
|---|
| 4846 |
|
|---|
| 4847 | /*
|
|---|
| 4848 | * Flush it from the cache.
|
|---|
| 4849 | */
|
|---|
| 4850 | pgmPoolCacheFlushPage(pPool, pPage);
|
|---|
| 4851 |
|
|---|
| 4852 | /*
|
|---|
| 4853 | * Deregistering the monitoring.
|
|---|
| 4854 | */
|
|---|
| 4855 | if (pPage->fMonitored)
|
|---|
| 4856 | rc = pgmPoolMonitorFlush(pPool, pPage);
|
|---|
| 4857 |
|
|---|
| 4858 | /*
|
|---|
| 4859 | * Free the page.
|
|---|
| 4860 | */
|
|---|
| 4861 | Assert(pPage->iNext == NIL_PGMPOOL_IDX);
|
|---|
| 4862 | pPage->iNext = pPool->iFreeHead;
|
|---|
| 4863 | pPool->iFreeHead = pPage->idx;
|
|---|
| 4864 | pPage->enmKind = PGMPOOLKIND_FREE;
|
|---|
| 4865 | pPage->enmAccess = PGMPOOLACCESS_DONTCARE;
|
|---|
| 4866 | pPage->GCPhys = NIL_RTGCPHYS;
|
|---|
| 4867 | pPage->fReusedFlushPending = false;
|
|---|
| 4868 |
|
|---|
| 4869 | pPool->cUsedPages--;
|
|---|
| 4870 |
|
|---|
| 4871 | /* Flush the TLBs of all VCPUs if required. */
|
|---|
| 4872 | if ( fFlushRequired
|
|---|
| 4873 | && fFlush)
|
|---|
| 4874 | {
|
|---|
| 4875 | PGM_INVL_ALL_VCPU_TLBS(pVM);
|
|---|
| 4876 | }
|
|---|
| 4877 |
|
|---|
| 4878 | PGM_UNLOCK(pVM);
|
|---|
| 4879 | STAM_PROFILE_STOP(&pPool->StatFlushPage, f);
|
|---|
| 4880 | return rc;
|
|---|
| 4881 | }
|
|---|
| 4882 |
|
|---|
| 4883 |
|
|---|
| 4884 | /**
|
|---|
| 4885 | * Frees a usage of a pool page.
|
|---|
| 4886 | *
|
|---|
| 4887 | * The caller is responsible to updating the user table so that it no longer
|
|---|
| 4888 | * references the shadow page.
|
|---|
| 4889 | *
|
|---|
| 4890 | * @param pPool The pool.
|
|---|
| 4891 | * @param pPage The shadow page.
|
|---|
| 4892 | * @param iUser The shadow page pool index of the user table.
|
|---|
| 4893 | * NIL_PGMPOOL_IDX for root pages.
|
|---|
| 4894 | * @param iUserTable The index into the user table (shadowed). Ignored if
|
|---|
| 4895 | * root page.
|
|---|
| 4896 | */
|
|---|
| 4897 | void pgmPoolFreeByPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable)
|
|---|
| 4898 | {
|
|---|
| 4899 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4900 |
|
|---|
| 4901 | STAM_PROFILE_START(&pPool->StatFree, a);
|
|---|
| 4902 | LogFlow(("pgmPoolFreeByPage: pPage=%p:{.Key=%RHp, .idx=%d, enmKind=%s} iUser=%d iUserTable=%#x\n",
|
|---|
| 4903 | pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), iUser, iUserTable));
|
|---|
| 4904 | AssertReturnVoid(pPage->idx >= PGMPOOL_IDX_FIRST); /* paranoia (#6349) */
|
|---|
| 4905 |
|
|---|
| 4906 | PGM_LOCK_VOID(pVM);
|
|---|
| 4907 | if (iUser != NIL_PGMPOOL_IDX)
|
|---|
| 4908 | pgmPoolTrackFreeUser(pPool, pPage, iUser, iUserTable);
|
|---|
| 4909 | if (!pPage->fCached)
|
|---|
| 4910 | pgmPoolFlushPage(pPool, pPage);
|
|---|
| 4911 | PGM_UNLOCK(pVM);
|
|---|
| 4912 | STAM_PROFILE_STOP(&pPool->StatFree, a);
|
|---|
| 4913 | }
|
|---|
| 4914 |
|
|---|
| 4915 |
|
|---|
| 4916 | /**
|
|---|
| 4917 | * Makes one or more free page free.
|
|---|
| 4918 | *
|
|---|
| 4919 | * @returns VBox status code.
|
|---|
| 4920 | * @retval VINF_SUCCESS on success.
|
|---|
| 4921 | *
|
|---|
| 4922 | * @param pPool The pool.
|
|---|
| 4923 | * @param enmKind Page table kind
|
|---|
| 4924 | * @param iUser The user of the page.
|
|---|
| 4925 | */
|
|---|
| 4926 | static int pgmPoolMakeMoreFreePages(PPGMPOOL pPool, PGMPOOLKIND enmKind, uint16_t iUser)
|
|---|
| 4927 | {
|
|---|
| 4928 | PVMCC pVM = pPool->CTX_SUFF(pVM);
|
|---|
| 4929 | LogFlow(("pgmPoolMakeMoreFreePages: enmKind=%d iUser=%d\n", enmKind, iUser));
|
|---|
| 4930 | NOREF(enmKind);
|
|---|
| 4931 |
|
|---|
| 4932 | /*
|
|---|
| 4933 | * If the pool isn't full grown yet, expand it.
|
|---|
| 4934 | */
|
|---|
| 4935 | if (pPool->cCurPages < pPool->cMaxPages)
|
|---|
| 4936 | {
|
|---|
| 4937 | STAM_PROFILE_ADV_SUSPEND(&pPool->StatAlloc, a);
|
|---|
| 4938 | #ifdef IN_RING3
|
|---|
| 4939 | int rc = PGMR3PoolGrow(pVM, VMMGetCpu(pVM));
|
|---|
| 4940 | #else
|
|---|
| 4941 | int rc = PGMR0PoolGrow(pVM, VMMGetCpuId(pVM));
|
|---|
| 4942 | #endif
|
|---|
| 4943 | if (RT_FAILURE(rc))
|
|---|
| 4944 | return rc;
|
|---|
| 4945 | STAM_PROFILE_ADV_RESUME(&pPool->StatAlloc, a);
|
|---|
| 4946 | if (pPool->iFreeHead != NIL_PGMPOOL_IDX)
|
|---|
| 4947 | return VINF_SUCCESS;
|
|---|
| 4948 | }
|
|---|
| 4949 |
|
|---|
| 4950 | /*
|
|---|
| 4951 | * Free one cached page.
|
|---|
| 4952 | */
|
|---|
| 4953 | return pgmPoolCacheFreeOne(pPool, iUser);
|
|---|
| 4954 | }
|
|---|
| 4955 |
|
|---|
| 4956 |
|
|---|
| 4957 | /**
|
|---|
| 4958 | * Allocates a page from the pool.
|
|---|
| 4959 | *
|
|---|
| 4960 | * This page may actually be a cached page and not in need of any processing
|
|---|
| 4961 | * on the callers part.
|
|---|
| 4962 | *
|
|---|
| 4963 | * @returns VBox status code.
|
|---|
| 4964 | * @retval VINF_SUCCESS if a NEW page was allocated.
|
|---|
| 4965 | * @retval VINF_PGM_CACHED_PAGE if a CACHED page was returned.
|
|---|
| 4966 | *
|
|---|
| 4967 | * @param pVM The cross context VM structure.
|
|---|
| 4968 | * @param GCPhys The GC physical address of the page we're gonna shadow.
|
|---|
| 4969 | * For 4MB and 2MB PD entries, it's the first address the
|
|---|
| 4970 | * shadow PT is covering.
|
|---|
| 4971 | * @param enmKind The kind of mapping.
|
|---|
| 4972 | * @param enmAccess Access type for the mapping (only relevant for big pages)
|
|---|
| 4973 | * @param fA20Enabled Whether the A20 gate is enabled or not.
|
|---|
| 4974 | * @param iUser The shadow page pool index of the user table. Root
|
|---|
| 4975 | * pages should pass NIL_PGMPOOL_IDX.
|
|---|
| 4976 | * @param iUserTable The index into the user table (shadowed). Ignored for
|
|---|
| 4977 | * root pages (iUser == NIL_PGMPOOL_IDX).
|
|---|
| 4978 | * @param fLockPage Lock the page
|
|---|
| 4979 | * @param ppPage Where to store the pointer to the page. NULL is stored here on failure.
|
|---|
| 4980 | */
|
|---|
| 4981 | int pgmPoolAlloc(PVMCC pVM, RTGCPHYS GCPhys, PGMPOOLKIND enmKind, PGMPOOLACCESS enmAccess, bool fA20Enabled,
|
|---|
| 4982 | uint16_t iUser, uint32_t iUserTable, bool fLockPage, PPPGMPOOLPAGE ppPage)
|
|---|
| 4983 | {
|
|---|
| 4984 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 4985 | STAM_PROFILE_ADV_START(&pPool->StatAlloc, a);
|
|---|
| 4986 | LogFlow(("pgmPoolAlloc: GCPhys=%RGp enmKind=%s iUser=%d iUserTable=%#x\n", GCPhys, pgmPoolPoolKindToStr(enmKind), iUser, iUserTable));
|
|---|
| 4987 | *ppPage = NULL;
|
|---|
| 4988 | /** @todo CSAM/PGMPrefetchPage messes up here during CSAMR3CheckGates
|
|---|
| 4989 | * (TRPMR3SyncIDT) because of FF priority. Try fix that?
|
|---|
| 4990 | * Assert(!(pVM->pgm.s.fGlobalSyncFlags & PGM_SYNC_CLEAR_PGM_POOL)); */
|
|---|
| 4991 |
|
|---|
| 4992 | PGM_LOCK_VOID(pVM);
|
|---|
| 4993 |
|
|---|
| 4994 | if (pPool->fCacheEnabled)
|
|---|
| 4995 | {
|
|---|
| 4996 | int rc2 = pgmPoolCacheAlloc(pPool, GCPhys, enmKind, enmAccess, fA20Enabled, iUser, iUserTable, ppPage);
|
|---|
| 4997 | if (RT_SUCCESS(rc2))
|
|---|
| 4998 | {
|
|---|
| 4999 | if (fLockPage)
|
|---|
| 5000 | pgmPoolLockPage(pPool, *ppPage);
|
|---|
| 5001 | PGM_UNLOCK(pVM);
|
|---|
| 5002 | STAM_PROFILE_ADV_STOP(&pPool->StatAlloc, a);
|
|---|
| 5003 | LogFlow(("pgmPoolAlloc: cached returns %Rrc *ppPage=%p:{.Key=%RHp, .idx=%d}\n", rc2, *ppPage, (*ppPage)->Core.Key, (*ppPage)->idx));
|
|---|
| 5004 | return rc2;
|
|---|
| 5005 | }
|
|---|
| 5006 | }
|
|---|
| 5007 |
|
|---|
| 5008 | /*
|
|---|
| 5009 | * Allocate a new one.
|
|---|
| 5010 | */
|
|---|
| 5011 | int rc = VINF_SUCCESS;
|
|---|
| 5012 | uint16_t iNew = pPool->iFreeHead;
|
|---|
| 5013 | if (iNew == NIL_PGMPOOL_IDX)
|
|---|
| 5014 | {
|
|---|
| 5015 | rc = pgmPoolMakeMoreFreePages(pPool, enmKind, iUser);
|
|---|
| 5016 | if (RT_FAILURE(rc))
|
|---|
| 5017 | {
|
|---|
| 5018 | PGM_UNLOCK(pVM);
|
|---|
| 5019 | Log(("pgmPoolAlloc: returns %Rrc (Free)\n", rc));
|
|---|
| 5020 | STAM_PROFILE_ADV_STOP(&pPool->StatAlloc, a);
|
|---|
| 5021 | return rc;
|
|---|
| 5022 | }
|
|---|
| 5023 | iNew = pPool->iFreeHead;
|
|---|
| 5024 | AssertReleaseMsgReturn(iNew != NIL_PGMPOOL_IDX, ("iNew=%#x\n", iNew), VERR_PGM_POOL_IPE);
|
|---|
| 5025 | }
|
|---|
| 5026 |
|
|---|
| 5027 | /* unlink the free head */
|
|---|
| 5028 | PPGMPOOLPAGE pPage = &pPool->aPages[iNew];
|
|---|
| 5029 | pPool->iFreeHead = pPage->iNext;
|
|---|
| 5030 | pPage->iNext = NIL_PGMPOOL_IDX;
|
|---|
| 5031 |
|
|---|
| 5032 | /*
|
|---|
| 5033 | * Initialize it.
|
|---|
| 5034 | */
|
|---|
| 5035 | pPool->cUsedPages++; /* physical handler registration / pgmPoolTrackFlushGCPhysPTsSlow requirement. */
|
|---|
| 5036 | pPage->enmKind = enmKind;
|
|---|
| 5037 | pPage->enmAccess = enmAccess;
|
|---|
| 5038 | pPage->GCPhys = GCPhys;
|
|---|
| 5039 | pPage->fA20Enabled = fA20Enabled;
|
|---|
| 5040 | pPage->fSeenNonGlobal = false; /* Set this to 'true' to disable this feature. */
|
|---|
| 5041 | pPage->fMonitored = false;
|
|---|
| 5042 | pPage->fCached = false;
|
|---|
| 5043 | pPage->fDirty = false;
|
|---|
| 5044 | pPage->fReusedFlushPending = false;
|
|---|
| 5045 | pPage->cModifications = 0;
|
|---|
| 5046 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 5047 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 5048 | pPage->cPresent = 0;
|
|---|
| 5049 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 5050 | pPage->idxDirtyEntry = 0;
|
|---|
| 5051 | pPage->GCPtrLastAccessHandlerFault = NIL_RTGCPTR;
|
|---|
| 5052 | pPage->GCPtrLastAccessHandlerRip = NIL_RTGCPTR;
|
|---|
| 5053 | pPage->cLastAccessHandler = 0;
|
|---|
| 5054 | pPage->cLocked = 0;
|
|---|
| 5055 | # ifdef VBOX_STRICT
|
|---|
| 5056 | pPage->GCPtrDirtyFault = NIL_RTGCPTR;
|
|---|
| 5057 | # endif
|
|---|
| 5058 |
|
|---|
| 5059 | /*
|
|---|
| 5060 | * Insert into the tracking and cache. If this fails, free the page.
|
|---|
| 5061 | */
|
|---|
| 5062 | int rc3 = pgmPoolTrackInsert(pPool, pPage, GCPhys, iUser, iUserTable);
|
|---|
| 5063 | if (RT_FAILURE(rc3))
|
|---|
| 5064 | {
|
|---|
| 5065 | pPool->cUsedPages--;
|
|---|
| 5066 | pPage->enmKind = PGMPOOLKIND_FREE;
|
|---|
| 5067 | pPage->enmAccess = PGMPOOLACCESS_DONTCARE;
|
|---|
| 5068 | pPage->GCPhys = NIL_RTGCPHYS;
|
|---|
| 5069 | pPage->iNext = pPool->iFreeHead;
|
|---|
| 5070 | pPool->iFreeHead = pPage->idx;
|
|---|
| 5071 | PGM_UNLOCK(pVM);
|
|---|
| 5072 | STAM_PROFILE_ADV_STOP(&pPool->StatAlloc, a);
|
|---|
| 5073 | Log(("pgmPoolAlloc: returns %Rrc (Insert)\n", rc3));
|
|---|
| 5074 | return rc3;
|
|---|
| 5075 | }
|
|---|
| 5076 |
|
|---|
| 5077 | /*
|
|---|
| 5078 | * Commit the allocation, clear the page and return.
|
|---|
| 5079 | */
|
|---|
| 5080 | #ifdef VBOX_WITH_STATISTICS
|
|---|
| 5081 | if (pPool->cUsedPages > pPool->cUsedPagesHigh)
|
|---|
| 5082 | pPool->cUsedPagesHigh = pPool->cUsedPages;
|
|---|
| 5083 | #endif
|
|---|
| 5084 |
|
|---|
| 5085 | if (!pPage->fZeroed)
|
|---|
| 5086 | {
|
|---|
| 5087 | STAM_PROFILE_START(&pPool->StatZeroPage, z);
|
|---|
| 5088 | void *pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 5089 | ASMMemZeroPage(pv);
|
|---|
| 5090 | STAM_PROFILE_STOP(&pPool->StatZeroPage, z);
|
|---|
| 5091 | }
|
|---|
| 5092 |
|
|---|
| 5093 | *ppPage = pPage;
|
|---|
| 5094 | if (fLockPage)
|
|---|
| 5095 | pgmPoolLockPage(pPool, pPage);
|
|---|
| 5096 | PGM_UNLOCK(pVM);
|
|---|
| 5097 | LogFlow(("pgmPoolAlloc: returns %Rrc *ppPage=%p:{.Key=%RHp, .idx=%d, .fCached=%RTbool, .fMonitored=%RTbool}\n",
|
|---|
| 5098 | rc, pPage, pPage->Core.Key, pPage->idx, pPage->fCached, pPage->fMonitored));
|
|---|
| 5099 | STAM_PROFILE_ADV_STOP(&pPool->StatAlloc, a);
|
|---|
| 5100 | return rc;
|
|---|
| 5101 | }
|
|---|
| 5102 |
|
|---|
| 5103 |
|
|---|
| 5104 | /**
|
|---|
| 5105 | * Frees a usage of a pool page.
|
|---|
| 5106 | *
|
|---|
| 5107 | * @param pVM The cross context VM structure.
|
|---|
| 5108 | * @param HCPhys The HC physical address of the shadow page.
|
|---|
| 5109 | * @param iUser The shadow page pool index of the user table.
|
|---|
| 5110 | * NIL_PGMPOOL_IDX if root page.
|
|---|
| 5111 | * @param iUserTable The index into the user table (shadowed). Ignored if
|
|---|
| 5112 | * root page.
|
|---|
| 5113 | */
|
|---|
| 5114 | void pgmPoolFree(PVM pVM, RTHCPHYS HCPhys, uint16_t iUser, uint32_t iUserTable)
|
|---|
| 5115 | {
|
|---|
| 5116 | LogFlow(("pgmPoolFree: HCPhys=%RHp iUser=%d iUserTable=%#x\n", HCPhys, iUser, iUserTable));
|
|---|
| 5117 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 5118 | pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, HCPhys), iUser, iUserTable);
|
|---|
| 5119 | }
|
|---|
| 5120 |
|
|---|
| 5121 |
|
|---|
| 5122 | /**
|
|---|
| 5123 | * Internal worker for finding a 'in-use' shadow page give by it's physical address.
|
|---|
| 5124 | *
|
|---|
| 5125 | * @returns Pointer to the shadow page structure.
|
|---|
| 5126 | * @param pPool The pool.
|
|---|
| 5127 | * @param HCPhys The HC physical address of the shadow page.
|
|---|
| 5128 | */
|
|---|
| 5129 | PPGMPOOLPAGE pgmPoolGetPage(PPGMPOOL pPool, RTHCPHYS HCPhys)
|
|---|
| 5130 | {
|
|---|
| 5131 | PGM_LOCK_ASSERT_OWNER(pPool->CTX_SUFF(pVM));
|
|---|
| 5132 |
|
|---|
| 5133 | /*
|
|---|
| 5134 | * Look up the page.
|
|---|
| 5135 | */
|
|---|
| 5136 | PPGMPOOLPAGE pPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, HCPhys & X86_PTE_PAE_PG_MASK);
|
|---|
| 5137 |
|
|---|
| 5138 | AssertFatalMsg(pPage && pPage->enmKind != PGMPOOLKIND_FREE, ("HCPhys=%RHp pPage=%p idx=%d\n", HCPhys, pPage, (pPage) ? pPage->idx : 0));
|
|---|
| 5139 | return pPage;
|
|---|
| 5140 | }
|
|---|
| 5141 |
|
|---|
| 5142 |
|
|---|
| 5143 | /**
|
|---|
| 5144 | * Internal worker for finding a page for debugging purposes, no assertions.
|
|---|
| 5145 | *
|
|---|
| 5146 | * @returns Pointer to the shadow page structure. NULL on if not found.
|
|---|
| 5147 | * @param pPool The pool.
|
|---|
| 5148 | * @param HCPhys The HC physical address of the shadow page.
|
|---|
| 5149 | */
|
|---|
| 5150 | PPGMPOOLPAGE pgmPoolQueryPageForDbg(PPGMPOOL pPool, RTHCPHYS HCPhys)
|
|---|
| 5151 | {
|
|---|
| 5152 | PGM_LOCK_ASSERT_OWNER(pPool->CTX_SUFF(pVM));
|
|---|
| 5153 | return (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, HCPhys & X86_PTE_PAE_PG_MASK);
|
|---|
| 5154 | }
|
|---|
| 5155 |
|
|---|
| 5156 |
|
|---|
| 5157 | /**
|
|---|
| 5158 | * Internal worker for PGM_HCPHYS_2_PTR.
|
|---|
| 5159 | *
|
|---|
| 5160 | * @returns VBox status code.
|
|---|
| 5161 | * @param pVM The cross context VM structure.
|
|---|
| 5162 | * @param HCPhys The HC physical address of the shadow page.
|
|---|
| 5163 | * @param ppv Where to return the address.
|
|---|
| 5164 | */
|
|---|
| 5165 | int pgmPoolHCPhys2Ptr(PVM pVM, RTHCPHYS HCPhys, void **ppv)
|
|---|
| 5166 | {
|
|---|
| 5167 | PPGMPOOLPAGE pPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pVM->pgm.s.CTX_SUFF(pPool)->HCPhysTree, HCPhys & X86_PTE_PAE_PG_MASK);
|
|---|
| 5168 | AssertMsgReturn(pPage && pPage->enmKind != PGMPOOLKIND_FREE,
|
|---|
| 5169 | ("HCPhys=%RHp pPage=%p idx=%d\n", HCPhys, pPage, (pPage) ? pPage->idx : 0),
|
|---|
| 5170 | VERR_PGM_POOL_GET_PAGE_FAILED);
|
|---|
| 5171 | *ppv = (uint8_t *)pPage->CTX_SUFF(pvPage) + (HCPhys & PAGE_OFFSET_MASK);
|
|---|
| 5172 | return VINF_SUCCESS;
|
|---|
| 5173 | }
|
|---|
| 5174 |
|
|---|
| 5175 | #ifdef IN_RING3 /* currently only used in ring 3; save some space in the R0 & GC modules (left it here as we might need it elsewhere later on) */
|
|---|
| 5176 |
|
|---|
| 5177 | /**
|
|---|
| 5178 | * Flush the specified page if present
|
|---|
| 5179 | *
|
|---|
| 5180 | * @param pVM The cross context VM structure.
|
|---|
| 5181 | * @param GCPhys Guest physical address of the page to flush
|
|---|
| 5182 | */
|
|---|
| 5183 | void pgmPoolFlushPageByGCPhys(PVM pVM, RTGCPHYS GCPhys)
|
|---|
| 5184 | {
|
|---|
| 5185 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 5186 |
|
|---|
| 5187 | VM_ASSERT_EMT(pVM);
|
|---|
| 5188 |
|
|---|
| 5189 | /*
|
|---|
| 5190 | * Look up the GCPhys in the hash.
|
|---|
| 5191 | */
|
|---|
| 5192 | GCPhys = GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
|
|---|
| 5193 | unsigned i = pPool->aiHash[PGMPOOL_HASH(GCPhys)];
|
|---|
| 5194 | if (i == NIL_PGMPOOL_IDX)
|
|---|
| 5195 | return;
|
|---|
| 5196 |
|
|---|
| 5197 | do
|
|---|
| 5198 | {
|
|---|
| 5199 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 5200 | if (pPage->GCPhys - GCPhys < PAGE_SIZE)
|
|---|
| 5201 | {
|
|---|
| 5202 | switch (pPage->enmKind)
|
|---|
| 5203 | {
|
|---|
| 5204 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 5205 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 5206 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 5207 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 5208 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 5209 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 5210 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 5211 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 5212 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 5213 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 5214 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 5215 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 5216 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 5217 | {
|
|---|
| 5218 | Log(("PGMPoolFlushPage: found pgm pool pages for %RGp\n", GCPhys));
|
|---|
| 5219 | # ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 5220 | if (pPage->fDirty)
|
|---|
| 5221 | STAM_COUNTER_INC(&pPool->StatForceFlushDirtyPage);
|
|---|
| 5222 | else
|
|---|
| 5223 | # endif
|
|---|
| 5224 | STAM_COUNTER_INC(&pPool->StatForceFlushPage);
|
|---|
| 5225 | Assert(!pgmPoolIsPageLocked(pPage));
|
|---|
| 5226 | pgmPoolMonitorChainFlush(pPool, pPage);
|
|---|
| 5227 | return;
|
|---|
| 5228 | }
|
|---|
| 5229 |
|
|---|
| 5230 | /* ignore, no monitoring. */
|
|---|
| 5231 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 5232 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 5233 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 5234 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 5235 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 5236 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 5237 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 5238 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 5239 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 5240 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 5241 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 5242 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 5243 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 5244 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 5245 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 5246 | break;
|
|---|
| 5247 |
|
|---|
| 5248 | default:
|
|---|
| 5249 | AssertFatalMsgFailed(("enmKind=%d idx=%d\n", pPage->enmKind, pPage->idx));
|
|---|
| 5250 | }
|
|---|
| 5251 | }
|
|---|
| 5252 |
|
|---|
| 5253 | /* next */
|
|---|
| 5254 | i = pPage->iNext;
|
|---|
| 5255 | } while (i != NIL_PGMPOOL_IDX);
|
|---|
| 5256 | return;
|
|---|
| 5257 | }
|
|---|
| 5258 |
|
|---|
| 5259 |
|
|---|
| 5260 | /**
|
|---|
| 5261 | * Reset CPU on hot plugging.
|
|---|
| 5262 | *
|
|---|
| 5263 | * @param pVM The cross context VM structure.
|
|---|
| 5264 | * @param pVCpu The cross context virtual CPU structure.
|
|---|
| 5265 | */
|
|---|
| 5266 | void pgmR3PoolResetUnpluggedCpu(PVM pVM, PVMCPU pVCpu)
|
|---|
| 5267 | {
|
|---|
| 5268 | pgmR3ExitShadowModeBeforePoolFlush(pVCpu);
|
|---|
| 5269 |
|
|---|
| 5270 | pgmR3ReEnterShadowModeAfterPoolFlush(pVM, pVCpu);
|
|---|
| 5271 | VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|---|
| 5272 | VMCPU_FF_SET(pVCpu, VMCPU_FF_TLB_FLUSH);
|
|---|
| 5273 | }
|
|---|
| 5274 |
|
|---|
| 5275 |
|
|---|
| 5276 | /**
|
|---|
| 5277 | * Flushes the entire cache.
|
|---|
| 5278 | *
|
|---|
| 5279 | * It will assert a global CR3 flush (FF) and assumes the caller is aware of
|
|---|
| 5280 | * this and execute this CR3 flush.
|
|---|
| 5281 | *
|
|---|
| 5282 | * @param pVM The cross context VM structure.
|
|---|
| 5283 | */
|
|---|
| 5284 | void pgmR3PoolReset(PVM pVM)
|
|---|
| 5285 | {
|
|---|
| 5286 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 5287 |
|
|---|
| 5288 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 5289 | STAM_PROFILE_START(&pPool->StatR3Reset, a);
|
|---|
| 5290 | LogFlow(("pgmR3PoolReset:\n"));
|
|---|
| 5291 |
|
|---|
| 5292 | /*
|
|---|
| 5293 | * If there are no pages in the pool, there is nothing to do.
|
|---|
| 5294 | */
|
|---|
| 5295 | if (pPool->cCurPages <= PGMPOOL_IDX_FIRST)
|
|---|
| 5296 | {
|
|---|
| 5297 | STAM_PROFILE_STOP(&pPool->StatR3Reset, a);
|
|---|
| 5298 | return;
|
|---|
| 5299 | }
|
|---|
| 5300 |
|
|---|
| 5301 | /*
|
|---|
| 5302 | * Exit the shadow mode since we're going to clear everything,
|
|---|
| 5303 | * including the root page.
|
|---|
| 5304 | */
|
|---|
| 5305 | VMCC_FOR_EACH_VMCPU(pVM)
|
|---|
| 5306 | pgmR3ExitShadowModeBeforePoolFlush(pVCpu);
|
|---|
| 5307 | VMCC_FOR_EACH_VMCPU_END(pVM);
|
|---|
| 5308 |
|
|---|
| 5309 |
|
|---|
| 5310 | /*
|
|---|
| 5311 | * Nuke the free list and reinsert all pages into it.
|
|---|
| 5312 | */
|
|---|
| 5313 | for (unsigned i = pPool->cCurPages - 1; i >= PGMPOOL_IDX_FIRST; i--)
|
|---|
| 5314 | {
|
|---|
| 5315 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 5316 |
|
|---|
| 5317 | if (pPage->fMonitored)
|
|---|
| 5318 | pgmPoolMonitorFlush(pPool, pPage);
|
|---|
| 5319 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 5320 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 5321 | pPage->iMonitoredNext = NIL_PGMPOOL_IDX;
|
|---|
| 5322 | pPage->iMonitoredPrev = NIL_PGMPOOL_IDX;
|
|---|
| 5323 | pPage->GCPhys = NIL_RTGCPHYS;
|
|---|
| 5324 | pPage->enmKind = PGMPOOLKIND_FREE;
|
|---|
| 5325 | pPage->enmAccess = PGMPOOLACCESS_DONTCARE;
|
|---|
| 5326 | Assert(pPage->idx == i);
|
|---|
| 5327 | pPage->iNext = i + 1;
|
|---|
| 5328 | pPage->fA20Enabled = true;
|
|---|
| 5329 | pPage->fZeroed = false; /* This could probably be optimized, but better safe than sorry. */
|
|---|
| 5330 | pPage->fSeenNonGlobal = false;
|
|---|
| 5331 | pPage->fMonitored = false;
|
|---|
| 5332 | pPage->fDirty = false;
|
|---|
| 5333 | pPage->fCached = false;
|
|---|
| 5334 | pPage->fReusedFlushPending = false;
|
|---|
| 5335 | pPage->iUserHead = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 5336 | pPage->cPresent = 0;
|
|---|
| 5337 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 5338 | pPage->cModifications = 0;
|
|---|
| 5339 | pPage->iAgeNext = NIL_PGMPOOL_IDX;
|
|---|
| 5340 | pPage->iAgePrev = NIL_PGMPOOL_IDX;
|
|---|
| 5341 | pPage->idxDirtyEntry = 0;
|
|---|
| 5342 | pPage->GCPtrLastAccessHandlerRip = NIL_RTGCPTR;
|
|---|
| 5343 | pPage->GCPtrLastAccessHandlerFault = NIL_RTGCPTR;
|
|---|
| 5344 | pPage->cLastAccessHandler = 0;
|
|---|
| 5345 | pPage->cLocked = 0;
|
|---|
| 5346 | # ifdef VBOX_STRICT
|
|---|
| 5347 | pPage->GCPtrDirtyFault = NIL_RTGCPTR;
|
|---|
| 5348 | # endif
|
|---|
| 5349 | }
|
|---|
| 5350 | pPool->aPages[pPool->cCurPages - 1].iNext = NIL_PGMPOOL_IDX;
|
|---|
| 5351 | pPool->iFreeHead = PGMPOOL_IDX_FIRST;
|
|---|
| 5352 | pPool->cUsedPages = 0;
|
|---|
| 5353 |
|
|---|
| 5354 | /*
|
|---|
| 5355 | * Zap and reinitialize the user records.
|
|---|
| 5356 | */
|
|---|
| 5357 | pPool->cPresent = 0;
|
|---|
| 5358 | pPool->iUserFreeHead = 0;
|
|---|
| 5359 | PPGMPOOLUSER paUsers = pPool->CTX_SUFF(paUsers);
|
|---|
| 5360 | const unsigned cMaxUsers = pPool->cMaxUsers;
|
|---|
| 5361 | for (unsigned i = 0; i < cMaxUsers; i++)
|
|---|
| 5362 | {
|
|---|
| 5363 | paUsers[i].iNext = i + 1;
|
|---|
| 5364 | paUsers[i].iUser = NIL_PGMPOOL_IDX;
|
|---|
| 5365 | paUsers[i].iUserTable = 0xfffffffe;
|
|---|
| 5366 | }
|
|---|
| 5367 | paUsers[cMaxUsers - 1].iNext = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 5368 |
|
|---|
| 5369 | /*
|
|---|
| 5370 | * Clear all the GCPhys links and rebuild the phys ext free list.
|
|---|
| 5371 | */
|
|---|
| 5372 | for (PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRangesX);
|
|---|
| 5373 | pRam;
|
|---|
| 5374 | pRam = pRam->CTX_SUFF(pNext))
|
|---|
| 5375 | {
|
|---|
| 5376 | unsigned iPage = pRam->cb >> PAGE_SHIFT;
|
|---|
| 5377 | while (iPage-- > 0)
|
|---|
| 5378 | PGM_PAGE_SET_TRACKING(pVM, &pRam->aPages[iPage], 0);
|
|---|
| 5379 | }
|
|---|
| 5380 |
|
|---|
| 5381 | pPool->iPhysExtFreeHead = 0;
|
|---|
| 5382 | PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
|
|---|
| 5383 | const unsigned cMaxPhysExts = pPool->cMaxPhysExts;
|
|---|
| 5384 | for (unsigned i = 0; i < cMaxPhysExts; i++)
|
|---|
| 5385 | {
|
|---|
| 5386 | paPhysExts[i].iNext = i + 1;
|
|---|
| 5387 | paPhysExts[i].aidx[0] = NIL_PGMPOOL_IDX;
|
|---|
| 5388 | paPhysExts[i].apte[0] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 5389 | paPhysExts[i].aidx[1] = NIL_PGMPOOL_IDX;
|
|---|
| 5390 | paPhysExts[i].apte[1] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 5391 | paPhysExts[i].aidx[2] = NIL_PGMPOOL_IDX;
|
|---|
| 5392 | paPhysExts[i].apte[2] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 5393 | }
|
|---|
| 5394 | paPhysExts[cMaxPhysExts - 1].iNext = NIL_PGMPOOL_PHYSEXT_INDEX;
|
|---|
| 5395 |
|
|---|
| 5396 | /*
|
|---|
| 5397 | * Just zap the modified list.
|
|---|
| 5398 | */
|
|---|
| 5399 | pPool->cModifiedPages = 0;
|
|---|
| 5400 | pPool->iModifiedHead = NIL_PGMPOOL_IDX;
|
|---|
| 5401 |
|
|---|
| 5402 | /*
|
|---|
| 5403 | * Clear the GCPhys hash and the age list.
|
|---|
| 5404 | */
|
|---|
| 5405 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aiHash); i++)
|
|---|
| 5406 | pPool->aiHash[i] = NIL_PGMPOOL_IDX;
|
|---|
| 5407 | pPool->iAgeHead = NIL_PGMPOOL_IDX;
|
|---|
| 5408 | pPool->iAgeTail = NIL_PGMPOOL_IDX;
|
|---|
| 5409 |
|
|---|
| 5410 | # ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 5411 | /* Clear all dirty pages. */
|
|---|
| 5412 | pPool->idxFreeDirtyPage = 0;
|
|---|
| 5413 | pPool->cDirtyPages = 0;
|
|---|
| 5414 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aidxDirtyPages); i++)
|
|---|
| 5415 | pPool->aidxDirtyPages[i] = NIL_PGMPOOL_IDX;
|
|---|
| 5416 | # endif
|
|---|
| 5417 |
|
|---|
| 5418 | /*
|
|---|
| 5419 | * Reinsert active pages into the hash and ensure monitoring chains are correct.
|
|---|
| 5420 | */
|
|---|
| 5421 | VMCC_FOR_EACH_VMCPU(pVM)
|
|---|
| 5422 | {
|
|---|
| 5423 | /*
|
|---|
| 5424 | * Re-enter the shadowing mode and assert Sync CR3 FF.
|
|---|
| 5425 | */
|
|---|
| 5426 | pgmR3ReEnterShadowModeAfterPoolFlush(pVM, pVCpu);
|
|---|
| 5427 | VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|---|
| 5428 | VMCPU_FF_SET(pVCpu, VMCPU_FF_TLB_FLUSH);
|
|---|
| 5429 | }
|
|---|
| 5430 | VMCC_FOR_EACH_VMCPU_END(pVM);
|
|---|
| 5431 |
|
|---|
| 5432 | STAM_PROFILE_STOP(&pPool->StatR3Reset, a);
|
|---|
| 5433 | }
|
|---|
| 5434 |
|
|---|
| 5435 | #endif /* IN_RING3 */
|
|---|
| 5436 |
|
|---|
| 5437 | #if defined(LOG_ENABLED) || defined(VBOX_STRICT)
|
|---|
| 5438 | /**
|
|---|
| 5439 | * Stringifies a PGMPOOLKIND value.
|
|---|
| 5440 | */
|
|---|
| 5441 | static const char *pgmPoolPoolKindToStr(uint8_t enmKind)
|
|---|
| 5442 | {
|
|---|
| 5443 | switch ((PGMPOOLKIND)enmKind)
|
|---|
| 5444 | {
|
|---|
| 5445 | case PGMPOOLKIND_INVALID:
|
|---|
| 5446 | return "PGMPOOLKIND_INVALID";
|
|---|
| 5447 | case PGMPOOLKIND_FREE:
|
|---|
| 5448 | return "PGMPOOLKIND_FREE";
|
|---|
| 5449 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 5450 | return "PGMPOOLKIND_32BIT_PT_FOR_PHYS";
|
|---|
| 5451 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 5452 | return "PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT";
|
|---|
| 5453 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 5454 | return "PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB";
|
|---|
| 5455 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 5456 | return "PGMPOOLKIND_PAE_PT_FOR_PHYS";
|
|---|
| 5457 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 5458 | return "PGMPOOLKIND_PAE_PT_FOR_32BIT_PT";
|
|---|
| 5459 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 5460 | return "PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB";
|
|---|
| 5461 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 5462 | return "PGMPOOLKIND_PAE_PT_FOR_PAE_PT";
|
|---|
| 5463 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 5464 | return "PGMPOOLKIND_PAE_PT_FOR_PAE_2MB";
|
|---|
| 5465 | case PGMPOOLKIND_32BIT_PD:
|
|---|
| 5466 | return "PGMPOOLKIND_32BIT_PD";
|
|---|
| 5467 | case PGMPOOLKIND_32BIT_PD_PHYS:
|
|---|
| 5468 | return "PGMPOOLKIND_32BIT_PD_PHYS";
|
|---|
| 5469 | case PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD:
|
|---|
| 5470 | return "PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD";
|
|---|
| 5471 | case PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD:
|
|---|
| 5472 | return "PGMPOOLKIND_PAE_PD1_FOR_32BIT_PD";
|
|---|
| 5473 | case PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD:
|
|---|
| 5474 | return "PGMPOOLKIND_PAE_PD2_FOR_32BIT_PD";
|
|---|
| 5475 | case PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD:
|
|---|
| 5476 | return "PGMPOOLKIND_PAE_PD3_FOR_32BIT_PD";
|
|---|
| 5477 | case PGMPOOLKIND_PAE_PD_FOR_PAE_PD:
|
|---|
| 5478 | return "PGMPOOLKIND_PAE_PD_FOR_PAE_PD";
|
|---|
| 5479 | case PGMPOOLKIND_PAE_PD_PHYS:
|
|---|
| 5480 | return "PGMPOOLKIND_PAE_PD_PHYS";
|
|---|
| 5481 | case PGMPOOLKIND_PAE_PDPT_FOR_32BIT:
|
|---|
| 5482 | return "PGMPOOLKIND_PAE_PDPT_FOR_32BIT";
|
|---|
| 5483 | case PGMPOOLKIND_PAE_PDPT:
|
|---|
| 5484 | return "PGMPOOLKIND_PAE_PDPT";
|
|---|
| 5485 | case PGMPOOLKIND_PAE_PDPT_PHYS:
|
|---|
| 5486 | return "PGMPOOLKIND_PAE_PDPT_PHYS";
|
|---|
| 5487 | case PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT:
|
|---|
| 5488 | return "PGMPOOLKIND_64BIT_PDPT_FOR_64BIT_PDPT";
|
|---|
| 5489 | case PGMPOOLKIND_64BIT_PDPT_FOR_PHYS:
|
|---|
| 5490 | return "PGMPOOLKIND_64BIT_PDPT_FOR_PHYS";
|
|---|
| 5491 | case PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD:
|
|---|
| 5492 | return "PGMPOOLKIND_64BIT_PD_FOR_64BIT_PD";
|
|---|
| 5493 | case PGMPOOLKIND_64BIT_PD_FOR_PHYS:
|
|---|
| 5494 | return "PGMPOOLKIND_64BIT_PD_FOR_PHYS";
|
|---|
| 5495 | case PGMPOOLKIND_64BIT_PML4:
|
|---|
| 5496 | return "PGMPOOLKIND_64BIT_PML4";
|
|---|
| 5497 | case PGMPOOLKIND_EPT_PDPT_FOR_PHYS:
|
|---|
| 5498 | return "PGMPOOLKIND_EPT_PDPT_FOR_PHYS";
|
|---|
| 5499 | case PGMPOOLKIND_EPT_PD_FOR_PHYS:
|
|---|
| 5500 | return "PGMPOOLKIND_EPT_PD_FOR_PHYS";
|
|---|
| 5501 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 5502 | return "PGMPOOLKIND_EPT_PT_FOR_PHYS";
|
|---|
| 5503 | case PGMPOOLKIND_ROOT_NESTED:
|
|---|
| 5504 | return "PGMPOOLKIND_ROOT_NESTED";
|
|---|
| 5505 | }
|
|---|
| 5506 | return "Unknown kind!";
|
|---|
| 5507 | }
|
|---|
| 5508 | #endif /* LOG_ENABLED || VBOX_STRICT */
|
|---|
| 5509 |
|
|---|
