| 1 | /* $Id: PGMBth.h 20374 2009-06-08 00:43:21Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox - Page Manager / Monitor, Shadow+Guest Paging Template.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 18 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 19 | * additional information or have any questions.
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| 20 | */
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| 21 |
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| 22 |
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| 23 | /*******************************************************************************
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| 24 | * Internal Functions *
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| 25 | *******************************************************************************/
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| 26 | RT_C_DECLS_BEGIN
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| 27 | PGM_BTH_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0);
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| 28 | PGM_BTH_DECL(int, Enter)(PVMCPU pVCpu, RTGCPHYS GCPhysCR3);
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| 29 | PGM_BTH_DECL(int, Relocate)(PVMCPU pVCpu, RTGCPTR offDelta);
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| 30 |
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| 31 | PGM_BTH_DECL(int, Trap0eHandler)(PVMCPU pVCpu, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault);
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| 32 | PGM_BTH_DECL(int, SyncCR3)(PVMCPU pVCpu, uint64_t cr0, uint64_t cr3, uint64_t cr4, bool fGlobal);
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| 33 | PGM_BTH_DECL(int, SyncPage)(PVMCPU pVCpu, X86PDE PdeSrc, RTGCPTR GCPtrPage, unsigned cPages, unsigned uError);
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| 34 | PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVMCPU pVCpu, RTGCPTR Addr, unsigned fPage, unsigned uError);
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| 35 | PGM_BTH_DECL(int, InvalidatePage)(PVMCPU pVCpu, RTGCPTR GCPtrPage);
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| 36 | PGM_BTH_DECL(int, PrefetchPage)(PVMCPU pVCpu, RTGCPTR GCPtrPage);
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| 37 | PGM_BTH_DECL(unsigned, AssertCR3)(PVMCPU pVCpu, uint64_t cr3, uint64_t cr4, RTGCPTR GCPtr = 0, RTGCPTR cb = ~(RTGCPTR)0);
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| 38 | PGM_BTH_DECL(int, MapCR3)(PVMCPU pVCpu, RTGCPHYS GCPhysCR3);
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| 39 | PGM_BTH_DECL(int, UnmapCR3)(PVMCPU pVCpu);
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| 40 | RT_C_DECLS_END
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| 41 |
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| 42 |
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| 43 | /**
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| 44 | * Initializes the both bit of the paging mode data.
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| 45 | *
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| 46 | * @returns VBox status code.
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| 47 | * @param pVM The VM handle.
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| 48 | * @param fResolveGCAndR0 Indicate whether or not GC and Ring-0 symbols can be resolved now.
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| 49 | * This is used early in the init process to avoid trouble with PDM
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| 50 | * not being initialized yet.
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| 51 | */
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| 52 | PGM_BTH_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0)
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| 53 | {
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| 54 | Assert(pModeData->uShwType == PGM_SHW_TYPE); Assert(pModeData->uGstType == PGM_GST_TYPE);
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| 55 |
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| 56 | /* Ring 3 */
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| 57 | pModeData->pfnR3BthRelocate = PGM_BTH_NAME(Relocate);
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| 58 | pModeData->pfnR3BthSyncCR3 = PGM_BTH_NAME(SyncCR3);
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| 59 | pModeData->pfnR3BthInvalidatePage = PGM_BTH_NAME(InvalidatePage);
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| 60 | pModeData->pfnR3BthSyncPage = PGM_BTH_NAME(SyncPage);
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| 61 | pModeData->pfnR3BthPrefetchPage = PGM_BTH_NAME(PrefetchPage);
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| 62 | pModeData->pfnR3BthVerifyAccessSyncPage = PGM_BTH_NAME(VerifyAccessSyncPage);
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| 63 | #ifdef VBOX_STRICT
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| 64 | pModeData->pfnR3BthAssertCR3 = PGM_BTH_NAME(AssertCR3);
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| 65 | #endif
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| 66 | pModeData->pfnR3BthMapCR3 = PGM_BTH_NAME(MapCR3);
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| 67 | pModeData->pfnR3BthUnmapCR3 = PGM_BTH_NAME(UnmapCR3);
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| 68 |
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| 69 | if (fResolveGCAndR0)
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| 70 | {
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| 71 | int rc;
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| 72 |
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| 73 | #if PGM_SHW_TYPE != PGM_TYPE_AMD64 && PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT /* No AMD64 for traditional virtualization, only VT-x and AMD-V. */
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| 74 | /* GC */
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| 75 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(Trap0eHandler), &pModeData->pfnRCBthTrap0eHandler);
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| 76 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(Trap0eHandler), rc), rc);
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| 77 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(InvalidatePage), &pModeData->pfnRCBthInvalidatePage);
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| 78 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(InvalidatePage), rc), rc);
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| 79 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(SyncCR3), &pModeData->pfnRCBthSyncCR3);
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| 80 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(SyncPage), rc), rc);
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| 81 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(SyncPage), &pModeData->pfnRCBthSyncPage);
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| 82 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(SyncPage), rc), rc);
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| 83 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(PrefetchPage), &pModeData->pfnRCBthPrefetchPage);
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| 84 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(PrefetchPage), rc), rc);
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| 85 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(VerifyAccessSyncPage),&pModeData->pfnRCBthVerifyAccessSyncPage);
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| 86 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(VerifyAccessSyncPage), rc), rc);
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| 87 | # ifdef VBOX_STRICT
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| 88 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(AssertCR3), &pModeData->pfnRCBthAssertCR3);
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| 89 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(AssertCR3), rc), rc);
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| 90 | # endif
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| 91 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(MapCR3), &pModeData->pfnRCBthMapCR3);
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| 92 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(MapCR3), rc), rc);
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| 93 | rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_BTH_NAME_RC_STR(UnmapCR3), &pModeData->pfnRCBthUnmapCR3);
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| 94 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_RC_STR(UnmapCR3), rc), rc);
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| 95 | #endif /* Not AMD64 shadow paging. */
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| 96 |
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| 97 | /* Ring 0 */
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| 98 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(Trap0eHandler), &pModeData->pfnR0BthTrap0eHandler);
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| 99 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(Trap0eHandler), rc), rc);
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| 100 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(InvalidatePage), &pModeData->pfnR0BthInvalidatePage);
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| 101 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(InvalidatePage), rc), rc);
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| 102 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(SyncCR3), &pModeData->pfnR0BthSyncCR3);
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| 103 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(SyncCR3), rc), rc);
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| 104 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(SyncPage), &pModeData->pfnR0BthSyncPage);
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| 105 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(SyncPage), rc), rc);
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| 106 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(PrefetchPage), &pModeData->pfnR0BthPrefetchPage);
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| 107 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(PrefetchPage), rc), rc);
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| 108 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(VerifyAccessSyncPage),&pModeData->pfnR0BthVerifyAccessSyncPage);
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| 109 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(VerifyAccessSyncPage), rc), rc);
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| 110 | #ifdef VBOX_STRICT
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| 111 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(AssertCR3), &pModeData->pfnR0BthAssertCR3);
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| 112 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(AssertCR3), rc), rc);
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| 113 | #endif
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| 114 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(MapCR3), &pModeData->pfnR0BthMapCR3);
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| 115 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(MapCR3), rc), rc);
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| 116 | rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_BTH_NAME_R0_STR(UnmapCR3), &pModeData->pfnR0BthUnmapCR3);
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| 117 | AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_BTH_NAME_R0_STR(UnmapCR3), rc), rc);
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| 118 | }
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| 119 | return VINF_SUCCESS;
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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 | * Enters the shadow+guest mode.
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| 125 | *
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| 126 | * @returns VBox status code.
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| 127 | * @param pVM VM handle.
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| 128 | * @param pVCpu The VMCPU to operate on.
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| 129 | * @param GCPhysCR3 The physical address from the CR3 register.
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| 130 | */
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| 131 | PGM_BTH_DECL(int, Enter)(PVMCPU pVCpu, RTGCPHYS GCPhysCR3)
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| 132 | {
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| 133 | /* Here we deal with allocation of the root shadow page table for real and protected mode during mode switches;
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| 134 | * Other modes rely on MapCR3/UnmapCR3 to setup the shadow root page tables.
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| 135 | */
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| 136 | #if ( ( PGM_SHW_TYPE == PGM_TYPE_32BIT \
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| 137 | || PGM_SHW_TYPE == PGM_TYPE_PAE \
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| 138 | || PGM_SHW_TYPE == PGM_TYPE_AMD64) \
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| 139 | && ( PGM_GST_TYPE == PGM_TYPE_REAL \
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| 140 | || PGM_GST_TYPE == PGM_TYPE_PROT))
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| 141 |
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| 142 | PVM pVM = pVCpu->pVMR3;
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| 143 |
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| 144 | Assert(!HWACCMIsNestedPagingActive(pVM));
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| 145 | /* Note: we only really need shadow paging in real and protected mode for VT-x and AMD-V (excluding nested paging/EPT modes),
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| 146 | * but any calls to GC need a proper shadow page setup as well.
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| 147 | */
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| 148 | /* Free the previous root mapping if still active. */
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| 149 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
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| 150 | if (pVCpu->pgm.s.CTX_SUFF(pShwPageCR3))
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| 151 | {
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| 152 | Assert(pVCpu->pgm.s.pShwPageCR3R3->enmKind != PGMPOOLKIND_FREE);
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| 153 |
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| 154 | /* Mark the page as unlocked; allow flushing again. */
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| 155 | pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
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| 156 |
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| 157 | /* Remove the hypervisor mappings from the shadow page table. */
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| 158 | pgmMapDeactivateCR3(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
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| 159 |
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| 160 | pgmPoolFreeByPage(pPool, pVCpu->pgm.s.pShwPageCR3R3, pVCpu->pgm.s.iShwUser, pVCpu->pgm.s.iShwUserTable);
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| 161 | pVCpu->pgm.s.pShwPageCR3R3 = 0;
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| 162 | pVCpu->pgm.s.pShwPageCR3RC = 0;
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| 163 | pVCpu->pgm.s.pShwPageCR3R0 = 0;
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| 164 | pVCpu->pgm.s.iShwUser = 0;
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| 165 | pVCpu->pgm.s.iShwUserTable = 0;
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| 166 | }
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| 167 |
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| 168 | /* contruct a fake address. */
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| 169 | GCPhysCR3 = RT_BIT_64(63);
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| 170 | pVCpu->pgm.s.iShwUser = SHW_POOL_ROOT_IDX;
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| 171 | pVCpu->pgm.s.iShwUserTable = GCPhysCR3 >> PAGE_SHIFT;
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| 172 | int rc = pgmPoolAlloc(pVM, GCPhysCR3, BTH_PGMPOOLKIND_ROOT, pVCpu->pgm.s.iShwUser, pVCpu->pgm.s.iShwUserTable, &pVCpu->pgm.s.pShwPageCR3R3);
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| 173 | if (rc == VERR_PGM_POOL_FLUSHED)
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| 174 | {
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| 175 | Log(("Bth-Enter: PGM pool flushed -> signal sync cr3\n"));
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| 176 | Assert(VMCPU_FF_ISSET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
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| 177 | return VINF_PGM_SYNC_CR3;
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| 178 | }
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| 179 | AssertRCReturn(rc, rc);
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| 180 |
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| 181 | /* Mark the page as locked; disallow flushing. */
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| 182 | pgmPoolLockPage(pPool, pVCpu->pgm.s.pShwPageCR3R3);
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| 183 |
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| 184 | pVCpu->pgm.s.pShwPageCR3R0 = MMHyperCCToR0(pVM, pVCpu->pgm.s.pShwPageCR3R3);
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| 185 | pVCpu->pgm.s.pShwPageCR3RC = MMHyperCCToRC(pVM, pVCpu->pgm.s.pShwPageCR3R3);
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| 186 |
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| 187 | /* Set the current hypervisor CR3. */
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| 188 | CPUMSetHyperCR3(pVCpu, PGMGetHyperCR3(pVCpu));
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| 189 |
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| 190 | /* Apply all hypervisor mappings to the new CR3. */
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| 191 | return pgmMapActivateCR3(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
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| 192 | #else
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| 193 | return VINF_SUCCESS;
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| 194 | #endif
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| 195 | }
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| 196 |
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| 197 |
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| 198 | /**
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| 199 | * Relocate any GC pointers related to shadow mode paging.
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| 200 | *
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| 201 | * @returns VBox status code.
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| 202 | * @param pVM The VM handle.
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| 203 | * @param pVCpu The VMCPU to operate on.
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| 204 | * @param offDelta The reloation offset.
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| 205 | */
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| 206 | PGM_BTH_DECL(int, Relocate)(PVMCPU pVCpu, RTGCPTR offDelta)
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| 207 | {
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| 208 | /* nothing special to do here - InitData does the job. */
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| 209 | return VINF_SUCCESS;
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| 210 | }
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| 211 |
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