/* $Id: PGMSavedState.cpp 32173 2010-09-01 11:37:08Z vboxsync $ */ /** @file * PGM - Page Manager and Monitor, The Saved State Part. */ /* * Copyright (C) 2006-2009 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_PGM #include #include #include #include #include #include "PGMInternal.h" #include #include "PGMInline.h" #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Defined Constants And Macros * *******************************************************************************/ /** Saved state data unit version. * @todo remove the guest mappings from the saved state at next version change! */ #define PGM_SAVED_STATE_VERSION 12 /** Saved state before the balloon change. */ #define PGM_SAVED_STATE_VERSION_PRE_BALLOON 11 /** Saved state data unit version used during 3.1 development, misses the RAM * config. */ #define PGM_SAVED_STATE_VERSION_NO_RAM_CFG 10 /** Saved state data unit version for 3.0 (pre teleportation). */ #define PGM_SAVED_STATE_VERSION_3_0_0 9 /** Saved state data unit version for 2.2.2 and later. */ #define PGM_SAVED_STATE_VERSION_2_2_2 8 /** Saved state data unit version for 2.2.0. */ #define PGM_SAVED_STATE_VERSION_RR_DESC 7 /** Saved state data unit version. */ #define PGM_SAVED_STATE_VERSION_OLD_PHYS_CODE 6 /** @name Sparse state record types * @{ */ /** Zero page. No data. */ #define PGM_STATE_REC_RAM_ZERO UINT8_C(0x00) /** Raw page. */ #define PGM_STATE_REC_RAM_RAW UINT8_C(0x01) /** Raw MMIO2 page. */ #define PGM_STATE_REC_MMIO2_RAW UINT8_C(0x02) /** Zero MMIO2 page. */ #define PGM_STATE_REC_MMIO2_ZERO UINT8_C(0x03) /** Virgin ROM page. Followed by protection (8-bit) and the raw bits. */ #define PGM_STATE_REC_ROM_VIRGIN UINT8_C(0x04) /** Raw shadowed ROM page. The protection (8-bit) preceeds the raw bits. */ #define PGM_STATE_REC_ROM_SHW_RAW UINT8_C(0x05) /** Zero shadowed ROM page. The protection (8-bit) is the only payload. */ #define PGM_STATE_REC_ROM_SHW_ZERO UINT8_C(0x06) /** ROM protection (8-bit). */ #define PGM_STATE_REC_ROM_PROT UINT8_C(0x07) /** The last record type. */ #define PGM_STATE_REC_LAST PGM_STATE_REC_ROM_PROT /** End marker. */ #define PGM_STATE_REC_END UINT8_C(0xff) /** Flag indicating that the data is preceeded by the page address. * For RAW pages this is a RTGCPHYS. For MMIO2 and ROM pages this is a 8-bit * range ID and a 32-bit page index. */ #define PGM_STATE_REC_FLAG_ADDR UINT8_C(0x80) /** @} */ /** The CRC-32 for a zero page. */ #define PGM_STATE_CRC32_ZERO_PAGE UINT32_C(0xc71c0011) /** The CRC-32 for a zero half page. */ #define PGM_STATE_CRC32_ZERO_HALF_PAGE UINT32_C(0xf1e8ba9e) /******************************************************************************* * Structures and Typedefs * *******************************************************************************/ /** For loading old saved states. (pre-smp) */ typedef struct { /** If set no conflict checks are required. (boolean) */ bool fMappingsFixed; /** Size of fixed mapping */ uint32_t cbMappingFixed; /** Base address (GC) of fixed mapping */ RTGCPTR GCPtrMappingFixed; /** A20 gate mask. * Our current approach to A20 emulation is to let REM do it and don't bother * anywhere else. The interesting guests will be operating with it enabled anyway. * But should the need arise, we'll subject physical addresses to this mask. */ RTGCPHYS GCPhysA20Mask; /** A20 gate state - boolean! */ bool fA20Enabled; /** The guest paging mode. */ PGMMODE enmGuestMode; } PGMOLD; /******************************************************************************* * Global Variables * *******************************************************************************/ /** PGM fields to save/load. */ static const SSMFIELD s_aPGMFields[] = { SSMFIELD_ENTRY( PGM, fMappingsFixed), SSMFIELD_ENTRY_GCPTR( PGM, GCPtrMappingFixed), SSMFIELD_ENTRY( PGM, cbMappingFixed), SSMFIELD_ENTRY( PGM, cBalloonedPages), SSMFIELD_ENTRY_TERM() }; static const SSMFIELD s_aPGMFieldsPreBalloon[] = { SSMFIELD_ENTRY( PGM, fMappingsFixed), SSMFIELD_ENTRY_GCPTR( PGM, GCPtrMappingFixed), SSMFIELD_ENTRY( PGM, cbMappingFixed), SSMFIELD_ENTRY_TERM() }; static const SSMFIELD s_aPGMCpuFields[] = { SSMFIELD_ENTRY( PGMCPU, fA20Enabled), SSMFIELD_ENTRY_GCPHYS( PGMCPU, GCPhysA20Mask), SSMFIELD_ENTRY( PGMCPU, enmGuestMode), SSMFIELD_ENTRY_TERM() }; static const SSMFIELD s_aPGMFields_Old[] = { SSMFIELD_ENTRY( PGMOLD, fMappingsFixed), SSMFIELD_ENTRY_GCPTR( PGMOLD, GCPtrMappingFixed), SSMFIELD_ENTRY( PGMOLD, cbMappingFixed), SSMFIELD_ENTRY( PGMOLD, fA20Enabled), SSMFIELD_ENTRY_GCPHYS( PGMOLD, GCPhysA20Mask), SSMFIELD_ENTRY( PGMOLD, enmGuestMode), SSMFIELD_ENTRY_TERM() }; /** * Find the ROM tracking structure for the given page. * * @returns Pointer to the ROM page structure. NULL if the caller didn't check * that it's a ROM page. * @param pVM The VM handle. * @param GCPhys The address of the ROM page. */ static PPGMROMPAGE pgmR3GetRomPage(PVM pVM, RTGCPHYS GCPhys) /** @todo change this to take a hint. */ { for (PPGMROMRANGE pRomRange = pVM->pgm.s.CTX_SUFF(pRomRanges); pRomRange; pRomRange = pRomRange->CTX_SUFF(pNext)) { RTGCPHYS off = GCPhys - pRomRange->GCPhys; if (GCPhys - pRomRange->GCPhys < pRomRange->cb) return &pRomRange->aPages[off >> PAGE_SHIFT]; } return NULL; } /** * Prepares the ROM pages for a live save. * * @returns VBox status code. * @param pVM The VM handle. */ static int pgmR3PrepRomPages(PVM pVM) { /* * Initialize the live save tracking in the ROM page descriptors. */ pgmLock(pVM); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { PPGMRAMRANGE pRamHint = NULL;; uint32_t const cPages = pRom->cb >> PAGE_SHIFT; for (uint32_t iPage = 0; iPage < cPages; iPage++) { pRom->aPages[iPage].LiveSave.u8Prot = (uint8_t)PGMROMPROT_INVALID; pRom->aPages[iPage].LiveSave.fWrittenTo = false; pRom->aPages[iPage].LiveSave.fDirty = true; pRom->aPages[iPage].LiveSave.fDirtiedRecently = true; if (!(pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)) { if (PGMROMPROT_IS_ROM(pRom->aPages[iPage].enmProt)) pRom->aPages[iPage].LiveSave.fWrittenTo = !PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow) && !PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow); else { RTGCPHYS GCPhys = pRom->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); PPGMPAGE pPage; int rc = pgmPhysGetPageWithHintEx(&pVM->pgm.s, GCPhys, &pPage, &pRamHint); AssertLogRelMsgRC(rc, ("%Rrc GCPhys=%RGp\n", rc, GCPhys)); if (RT_SUCCESS(rc)) pRom->aPages[iPage].LiveSave.fWrittenTo = !PGM_PAGE_IS_ZERO(pPage) && !PGM_PAGE_IS_BALLOONED(pPage); else pRom->aPages[iPage].LiveSave.fWrittenTo = !PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow) && !PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow); } } } pVM->pgm.s.LiveSave.Rom.cDirtyPages += cPages; if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) pVM->pgm.s.LiveSave.Rom.cDirtyPages += cPages; } pgmUnlock(pVM); return VINF_SUCCESS; } /** * Assigns IDs to the ROM ranges and saves them. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM Saved state handle. */ static int pgmR3SaveRomRanges(PVM pVM, PSSMHANDLE pSSM) { pgmLock(pVM); uint8_t id = 1; for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3, id++) { pRom->idSavedState = id; SSMR3PutU8(pSSM, id); SSMR3PutStrZ(pSSM, ""); /* device name */ SSMR3PutU32(pSSM, 0); /* device instance */ SSMR3PutU8(pSSM, 0); /* region */ SSMR3PutStrZ(pSSM, pRom->pszDesc); SSMR3PutGCPhys(pSSM, pRom->GCPhys); int rc = SSMR3PutGCPhys(pSSM, pRom->cb); if (RT_FAILURE(rc)) break; } pgmUnlock(pVM); return SSMR3PutU8(pSSM, UINT8_MAX); } /** * Loads the ROM range ID assignments. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The saved state handle. */ static int pgmR3LoadRomRanges(PVM pVM, PSSMHANDLE pSSM) { Assert(PGMIsLockOwner(pVM)); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) pRom->idSavedState = UINT8_MAX; for (;;) { /* * Read the data. */ uint8_t id; int rc = SSMR3GetU8(pSSM, &id); if (RT_FAILURE(rc)) return rc; if (id == UINT8_MAX) { for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) AssertLogRelMsg(pRom->idSavedState != UINT8_MAX, ("The \"%s\" ROM was not found in the saved state. Probably due to some misconfiguration\n", pRom->pszDesc)); return VINF_SUCCESS; /* the end */ } AssertLogRelReturn(id != 0, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); char szDevName[RT_SIZEOFMEMB(PDMDEVREG, szName)]; rc = SSMR3GetStrZ(pSSM, szDevName, sizeof(szDevName)); AssertLogRelRCReturn(rc, rc); uint32_t uInstance; SSMR3GetU32(pSSM, &uInstance); uint8_t iRegion; SSMR3GetU8(pSSM, &iRegion); char szDesc[64]; rc = SSMR3GetStrZ(pSSM, szDesc, sizeof(szDesc)); AssertLogRelRCReturn(rc, rc); RTGCPHYS GCPhys; SSMR3GetGCPhys(pSSM, &GCPhys); RTGCPHYS cb; rc = SSMR3GetGCPhys(pSSM, &cb); if (RT_FAILURE(rc)) return rc; AssertLogRelMsgReturn(!(GCPhys & PAGE_OFFSET_MASK), ("GCPhys=%RGp %s\n", GCPhys, szDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelMsgReturn(!(cb & PAGE_OFFSET_MASK), ("cb=%RGp %s\n", cb, szDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); /* * Locate a matching ROM range. */ AssertLogRelMsgReturn( uInstance == 0 && iRegion == 0 && szDevName[0] == '\0', ("GCPhys=%RGp %s\n", GCPhys, szDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); PPGMROMRANGE pRom; for (pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { if ( pRom->idSavedState == UINT8_MAX && !strcmp(pRom->pszDesc, szDesc)) { pRom->idSavedState = id; break; } } if (!pRom) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("ROM at %RGp by the name '%s' was not found"), GCPhys, szDesc); } /* forever */ } /** * Scan ROM pages. * * @param pVM The VM handle. */ static void pgmR3ScanRomPages(PVM pVM) { /* * The shadow ROMs. */ pgmLock(pVM); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) { uint32_t const cPages = pRom->cb >> PAGE_SHIFT; for (uint32_t iPage = 0; iPage < cPages; iPage++) { PPGMROMPAGE pRomPage = &pRom->aPages[iPage]; if (pRomPage->LiveSave.fWrittenTo) { pRomPage->LiveSave.fWrittenTo = false; if (!pRomPage->LiveSave.fDirty) { pRomPage->LiveSave.fDirty = true; pVM->pgm.s.LiveSave.Rom.cReadyPages--; pVM->pgm.s.LiveSave.Rom.cDirtyPages++; } pRomPage->LiveSave.fDirtiedRecently = true; } else pRomPage->LiveSave.fDirtiedRecently = false; } } } pgmUnlock(pVM); } /** * Takes care of the virgin ROM pages in the first pass. * * This is an attempt at simplifying the handling of ROM pages a little bit. * This ASSUMES that no new ROM ranges will be added and that they won't be * relinked in any way. * * @param pVM The VM handle. * @param pSSM The SSM handle. * @param fLiveSave Whether we're in a live save or not. */ static int pgmR3SaveRomVirginPages(PVM pVM, PSSMHANDLE pSSM, bool fLiveSave) { if (FTMIsDeltaLoadSaveActive(pVM)) return VINF_SUCCESS; /* nothing to do as nothing has changed here */ pgmLock(pVM); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { uint32_t const cPages = pRom->cb >> PAGE_SHIFT; for (uint32_t iPage = 0; iPage < cPages; iPage++) { RTGCPHYS GCPhys = pRom->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); PGMROMPROT enmProt = pRom->aPages[iPage].enmProt; /* Get the virgin page descriptor. */ PPGMPAGE pPage; if (PGMROMPROT_IS_ROM(enmProt)) pPage = pgmPhysGetPage(&pVM->pgm.s, GCPhys); else pPage = &pRom->aPages[iPage].Virgin; /* Get the page bits. (Cannot use pgmPhysGCPhys2CCPtrInternalReadOnly here!) */ int rc = VINF_SUCCESS; char abPage[PAGE_SIZE]; if ( !PGM_PAGE_IS_ZERO(pPage) && !PGM_PAGE_IS_BALLOONED(pPage)) { void const *pvPage; rc = pgmPhysPageMapReadOnly(pVM, pPage, GCPhys, &pvPage); if (RT_SUCCESS(rc)) memcpy(abPage, pvPage, PAGE_SIZE); } else ASMMemZeroPage(abPage); pgmUnlock(pVM); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc GCPhys=%RGp\n", rc, GCPhys), rc); /* Save it. */ if (iPage > 0) SSMR3PutU8(pSSM, PGM_STATE_REC_ROM_VIRGIN); else { SSMR3PutU8(pSSM, PGM_STATE_REC_ROM_VIRGIN | PGM_STATE_REC_FLAG_ADDR); SSMR3PutU8(pSSM, pRom->idSavedState); SSMR3PutU32(pSSM, iPage); } SSMR3PutU8(pSSM, (uint8_t)enmProt); rc = SSMR3PutMem(pSSM, abPage, PAGE_SIZE); if (RT_FAILURE(rc)) return rc; /* Update state. */ pgmLock(pVM); pRom->aPages[iPage].LiveSave.u8Prot = (uint8_t)enmProt; if (fLiveSave) { pVM->pgm.s.LiveSave.Rom.cDirtyPages--; pVM->pgm.s.LiveSave.Rom.cReadyPages++; pVM->pgm.s.LiveSave.cSavedPages++; } } } pgmUnlock(pVM); return VINF_SUCCESS; } /** * Saves dirty pages in the shadowed ROM ranges. * * Used by pgmR3LiveExecPart2 and pgmR3SaveExecMemory. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The SSM handle. * @param fLiveSave Whether it's a live save or not. * @param fFinalPass Whether this is the final pass or not. */ static int pgmR3SaveShadowedRomPages(PVM pVM, PSSMHANDLE pSSM, bool fLiveSave, bool fFinalPass) { if (FTMIsDeltaLoadSaveActive(pVM)) return VINF_SUCCESS; /* nothing to do as we deal with those pages seperately */ /* * The Shadowed ROMs. * * ASSUMES that the ROM ranges are fixed. * ASSUMES that all the ROM ranges are mapped. */ pgmLock(pVM); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) { uint32_t const cPages = pRom->cb >> PAGE_SHIFT; uint32_t iPrevPage = cPages; for (uint32_t iPage = 0; iPage < cPages; iPage++) { PPGMROMPAGE pRomPage = &pRom->aPages[iPage]; if ( !fLiveSave || ( pRomPage->LiveSave.fDirty && ( ( !pRomPage->LiveSave.fDirtiedRecently && !pRomPage->LiveSave.fWrittenTo) || fFinalPass ) ) ) { uint8_t abPage[PAGE_SIZE]; PGMROMPROT enmProt = pRomPage->enmProt; RTGCPHYS GCPhys = pRom->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); PPGMPAGE pPage = PGMROMPROT_IS_ROM(enmProt) ? &pRomPage->Shadow : pgmPhysGetPage(&pVM->pgm.s, GCPhys); bool fZero = PGM_PAGE_IS_ZERO(pPage) || PGM_PAGE_IS_BALLOONED(pPage); int rc = VINF_SUCCESS; if (!fZero) { void const *pvPage; rc = pgmPhysPageMapReadOnly(pVM, pPage, GCPhys, &pvPage); if (RT_SUCCESS(rc)) memcpy(abPage, pvPage, PAGE_SIZE); } if (fLiveSave && RT_SUCCESS(rc)) { pRomPage->LiveSave.u8Prot = (uint8_t)enmProt; pRomPage->LiveSave.fDirty = false; pVM->pgm.s.LiveSave.Rom.cReadyPages++; pVM->pgm.s.LiveSave.Rom.cDirtyPages--; pVM->pgm.s.LiveSave.cSavedPages++; } pgmUnlock(pVM); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc GCPhys=%RGp\n", rc, GCPhys), rc); if (iPage - 1U == iPrevPage && iPage > 0) SSMR3PutU8(pSSM, (fZero ? PGM_STATE_REC_ROM_SHW_ZERO : PGM_STATE_REC_ROM_SHW_RAW)); else { SSMR3PutU8(pSSM, (fZero ? PGM_STATE_REC_ROM_SHW_ZERO : PGM_STATE_REC_ROM_SHW_RAW) | PGM_STATE_REC_FLAG_ADDR); SSMR3PutU8(pSSM, pRom->idSavedState); SSMR3PutU32(pSSM, iPage); } rc = SSMR3PutU8(pSSM, (uint8_t)enmProt); if (!fZero) rc = SSMR3PutMem(pSSM, abPage, PAGE_SIZE); if (RT_FAILURE(rc)) return rc; pgmLock(pVM); iPrevPage = iPage; } /* * In the final pass, make sure the protection is in sync. */ else if ( fFinalPass && pRomPage->LiveSave.u8Prot != pRomPage->enmProt) { PGMROMPROT enmProt = pRomPage->enmProt; pRomPage->LiveSave.u8Prot = (uint8_t)enmProt; pgmUnlock(pVM); if (iPage - 1U == iPrevPage && iPage > 0) SSMR3PutU8(pSSM, PGM_STATE_REC_ROM_PROT); else { SSMR3PutU8(pSSM, PGM_STATE_REC_ROM_PROT | PGM_STATE_REC_FLAG_ADDR); SSMR3PutU8(pSSM, pRom->idSavedState); SSMR3PutU32(pSSM, iPage); } int rc = SSMR3PutU8(pSSM, (uint8_t)enmProt); if (RT_FAILURE(rc)) return rc; pgmLock(pVM); iPrevPage = iPage; } } } } pgmUnlock(pVM); return VINF_SUCCESS; } /** * Cleans up ROM pages after a live save. * * @param pVM The VM handle. */ static void pgmR3DoneRomPages(PVM pVM) { NOREF(pVM); } /** * Prepares the MMIO2 pages for a live save. * * @returns VBox status code. * @param pVM The VM handle. */ static int pgmR3PrepMmio2Pages(PVM pVM) { /* * Initialize the live save tracking in the MMIO2 ranges. * ASSUME nothing changes here. */ pgmLock(pVM); for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) { uint32_t const cPages = pMmio2->RamRange.cb >> PAGE_SHIFT; pgmUnlock(pVM); PPGMLIVESAVEMMIO2PAGE paLSPages = (PPGMLIVESAVEMMIO2PAGE)MMR3HeapAllocZ(pVM, MM_TAG_PGM, sizeof(PGMLIVESAVEMMIO2PAGE) * cPages); if (!paLSPages) return VERR_NO_MEMORY; for (uint32_t iPage = 0; iPage < cPages; iPage++) { /* Initialize it as a dirty zero page. */ paLSPages[iPage].fDirty = true; paLSPages[iPage].cUnchangedScans = 0; paLSPages[iPage].fZero = true; paLSPages[iPage].u32CrcH1 = PGM_STATE_CRC32_ZERO_HALF_PAGE; paLSPages[iPage].u32CrcH2 = PGM_STATE_CRC32_ZERO_HALF_PAGE; } pgmLock(pVM); pMmio2->paLSPages = paLSPages; pVM->pgm.s.LiveSave.Mmio2.cDirtyPages += cPages; } pgmUnlock(pVM); return VINF_SUCCESS; } /** * Assigns IDs to the MMIO2 ranges and saves them. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM Saved state handle. */ static int pgmR3SaveMmio2Ranges(PVM pVM, PSSMHANDLE pSSM) { pgmLock(pVM); uint8_t id = 1; for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3, id++) { pMmio2->idSavedState = id; SSMR3PutU8(pSSM, id); SSMR3PutStrZ(pSSM, pMmio2->pDevInsR3->pReg->szName); SSMR3PutU32(pSSM, pMmio2->pDevInsR3->iInstance); SSMR3PutU8(pSSM, pMmio2->iRegion); SSMR3PutStrZ(pSSM, pMmio2->RamRange.pszDesc); int rc = SSMR3PutGCPhys(pSSM, pMmio2->RamRange.cb); if (RT_FAILURE(rc)) break; } pgmUnlock(pVM); return SSMR3PutU8(pSSM, UINT8_MAX); } /** * Loads the MMIO2 range ID assignments. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The saved state handle. */ static int pgmR3LoadMmio2Ranges(PVM pVM, PSSMHANDLE pSSM) { Assert(PGMIsLockOwner(pVM)); for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) pMmio2->idSavedState = UINT8_MAX; for (;;) { /* * Read the data. */ uint8_t id; int rc = SSMR3GetU8(pSSM, &id); if (RT_FAILURE(rc)) return rc; if (id == UINT8_MAX) { for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) AssertLogRelMsg(pMmio2->idSavedState != UINT8_MAX, ("%s\n", pMmio2->RamRange.pszDesc)); return VINF_SUCCESS; /* the end */ } AssertLogRelReturn(id != 0, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); char szDevName[RT_SIZEOFMEMB(PDMDEVREG, szName)]; rc = SSMR3GetStrZ(pSSM, szDevName, sizeof(szDevName)); AssertLogRelRCReturn(rc, rc); uint32_t uInstance; SSMR3GetU32(pSSM, &uInstance); uint8_t iRegion; SSMR3GetU8(pSSM, &iRegion); char szDesc[64]; rc = SSMR3GetStrZ(pSSM, szDesc, sizeof(szDesc)); AssertLogRelRCReturn(rc, rc); RTGCPHYS cb; rc = SSMR3GetGCPhys(pSSM, &cb); AssertLogRelMsgReturn(!(cb & PAGE_OFFSET_MASK), ("cb=%RGp %s\n", cb, szDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); /* * Locate a matching MMIO2 range. */ PPGMMMIO2RANGE pMmio2; for (pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) { if ( pMmio2->idSavedState == UINT8_MAX && pMmio2->iRegion == iRegion && pMmio2->pDevInsR3->iInstance == uInstance && !strcmp(pMmio2->pDevInsR3->pReg->szName, szDevName)) { pMmio2->idSavedState = id; break; } } if (!pMmio2) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Failed to locate a MMIO2 range called '%s' owned by %s/%u, region %d"), szDesc, szDevName, uInstance, iRegion); /* * Validate the configuration, the size of the MMIO2 region should be * the same. */ if (cb != pMmio2->RamRange.cb) { LogRel(("PGM: MMIO2 region \"%s\" size mismatch: saved=%RGp config=%RGp\n", pMmio2->RamRange.pszDesc, cb, pMmio2->RamRange.cb)); if (cb > pMmio2->RamRange.cb) /* bad idea? */ return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("MMIO2 region \"%s\" size mismatch: saved=%RGp config=%RGp"), pMmio2->RamRange.pszDesc, cb, pMmio2->RamRange.cb); } } /* forever */ } /** * Scans one MMIO2 page. * * @returns True if changed, false if unchanged. * * @param pVM The VM handle * @param pbPage The page bits. * @param pLSPage The live save tracking structure for the page. * */ DECLINLINE(bool) pgmR3ScanMmio2Page(PVM pVM, uint8_t const *pbPage, PPGMLIVESAVEMMIO2PAGE pLSPage) { /* * Special handling of zero pages. */ bool const fZero = pLSPage->fZero; if (fZero) { if (ASMMemIsZeroPage(pbPage)) { /* Not modified. */ if (pLSPage->fDirty) pLSPage->cUnchangedScans++; return false; } pLSPage->fZero = false; pLSPage->u32CrcH1 = RTCrc32(pbPage, PAGE_SIZE / 2); } else { /* * CRC the first half, if it doesn't match the page is dirty and * we won't check the 2nd half (we'll do that next time). */ uint32_t u32CrcH1 = RTCrc32(pbPage, PAGE_SIZE / 2); if (u32CrcH1 == pLSPage->u32CrcH1) { uint32_t u32CrcH2 = RTCrc32(pbPage + PAGE_SIZE / 2, PAGE_SIZE / 2); if (u32CrcH2 == pLSPage->u32CrcH2) { /* Probably not modified. */ if (pLSPage->fDirty) pLSPage->cUnchangedScans++; return false; } pLSPage->u32CrcH2 = u32CrcH2; } else { pLSPage->u32CrcH1 = u32CrcH1; if ( u32CrcH1 == PGM_STATE_CRC32_ZERO_HALF_PAGE && ASMMemIsZeroPage(pbPage)) { pLSPage->u32CrcH2 = PGM_STATE_CRC32_ZERO_HALF_PAGE; pLSPage->fZero = true; } } } /* dirty page path */ pLSPage->cUnchangedScans = 0; if (!pLSPage->fDirty) { pLSPage->fDirty = true; pVM->pgm.s.LiveSave.Mmio2.cReadyPages--; pVM->pgm.s.LiveSave.Mmio2.cDirtyPages++; if (fZero) pVM->pgm.s.LiveSave.Mmio2.cZeroPages--; } return true; } /** * Scan for MMIO2 page modifications. * * @param pVM The VM handle. * @param uPass The pass number. */ static void pgmR3ScanMmio2Pages(PVM pVM, uint32_t uPass) { /* * Since this is a bit expensive we lower the scan rate after a little while. */ if ( ( (uPass & 3) != 0 && uPass > 10) || uPass == SSM_PASS_FINAL) return; pgmLock(pVM); /* paranoia */ for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) { PPGMLIVESAVEMMIO2PAGE paLSPages = pMmio2->paLSPages; uint32_t cPages = pMmio2->RamRange.cb >> PAGE_SHIFT; pgmUnlock(pVM); for (uint32_t iPage = 0; iPage < cPages; iPage++) { uint8_t const *pbPage = (uint8_t const *)pMmio2->pvR3 + iPage * PAGE_SIZE; pgmR3ScanMmio2Page(pVM, pbPage, &paLSPages[iPage]); } pgmLock(pVM); } pgmUnlock(pVM); } /** * Save quiescent MMIO2 pages. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The SSM handle. * @param fLiveSave Whether it's a live save or not. * @param uPass The pass number. */ static int pgmR3SaveMmio2Pages(PVM pVM, PSSMHANDLE pSSM, bool fLiveSave, uint32_t uPass) { /** @todo implement live saving of MMIO2 pages. (Need some way of telling the * device that we wish to know about changes.) */ int rc = VINF_SUCCESS; if (uPass == SSM_PASS_FINAL) { /* * The mop up round. */ pgmLock(pVM); for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2 && RT_SUCCESS(rc); pMmio2 = pMmio2->pNextR3) { PPGMLIVESAVEMMIO2PAGE paLSPages = pMmio2->paLSPages; uint8_t const *pbPage = (uint8_t const *)pMmio2->RamRange.pvR3; uint32_t cPages = pMmio2->RamRange.cb >> PAGE_SHIFT; uint32_t iPageLast = cPages; for (uint32_t iPage = 0; iPage < cPages; iPage++, pbPage += PAGE_SIZE) { uint8_t u8Type; if (!fLiveSave) u8Type = ASMMemIsZeroPage(pbPage) ? PGM_STATE_REC_MMIO2_ZERO : PGM_STATE_REC_MMIO2_RAW; else { /* Try figure if it's a clean page, compare the SHA-1 to be really sure. */ if ( !paLSPages[iPage].fDirty && !pgmR3ScanMmio2Page(pVM, pbPage, &paLSPages[iPage])) { if (paLSPages[iPage].fZero) continue; uint8_t abSha1Hash[RTSHA1_HASH_SIZE]; RTSha1(pbPage, PAGE_SIZE, abSha1Hash); if (!memcmp(abSha1Hash, paLSPages[iPage].abSha1Saved, sizeof(abSha1Hash))) continue; } u8Type = paLSPages[iPage].fZero ? PGM_STATE_REC_MMIO2_ZERO : PGM_STATE_REC_MMIO2_RAW; pVM->pgm.s.LiveSave.cSavedPages++; } if (iPage != 0 && iPage == iPageLast + 1) rc = SSMR3PutU8(pSSM, u8Type); else { SSMR3PutU8(pSSM, u8Type | PGM_STATE_REC_FLAG_ADDR); SSMR3PutU8(pSSM, pMmio2->idSavedState); rc = SSMR3PutU32(pSSM, iPage); } if (u8Type == PGM_STATE_REC_MMIO2_RAW) rc = SSMR3PutMem(pSSM, pbPage, PAGE_SIZE); if (RT_FAILURE(rc)) break; iPageLast = iPage; } } pgmUnlock(pVM); } /* * Reduce the rate after a little while since the current MMIO2 approach is * a bit expensive. * We position it two passes after the scan pass to avoid saving busy pages. */ else if ( uPass <= 10 || (uPass & 3) == 2) { pgmLock(pVM); for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2 && RT_SUCCESS(rc); pMmio2 = pMmio2->pNextR3) { PPGMLIVESAVEMMIO2PAGE paLSPages = pMmio2->paLSPages; uint8_t const *pbPage = (uint8_t const *)pMmio2->RamRange.pvR3; uint32_t cPages = pMmio2->RamRange.cb >> PAGE_SHIFT; uint32_t iPageLast = cPages; pgmUnlock(pVM); for (uint32_t iPage = 0; iPage < cPages; iPage++, pbPage += PAGE_SIZE) { /* Skip clean pages and pages which hasn't quiesced. */ if (!paLSPages[iPage].fDirty) continue; if (paLSPages[iPage].cUnchangedScans < 3) continue; if (pgmR3ScanMmio2Page(pVM, pbPage, &paLSPages[iPage])) continue; /* Save it. */ bool const fZero = paLSPages[iPage].fZero; uint8_t abPage[PAGE_SIZE]; if (!fZero) { memcpy(abPage, pbPage, PAGE_SIZE); RTSha1(abPage, PAGE_SIZE, paLSPages[iPage].abSha1Saved); } uint8_t u8Type = paLSPages[iPage].fZero ? PGM_STATE_REC_MMIO2_ZERO : PGM_STATE_REC_MMIO2_RAW; if (iPage != 0 && iPage == iPageLast + 1) rc = SSMR3PutU8(pSSM, u8Type); else { SSMR3PutU8(pSSM, u8Type | PGM_STATE_REC_FLAG_ADDR); SSMR3PutU8(pSSM, pMmio2->idSavedState); rc = SSMR3PutU32(pSSM, iPage); } if (u8Type == PGM_STATE_REC_MMIO2_RAW) rc = SSMR3PutMem(pSSM, abPage, PAGE_SIZE); if (RT_FAILURE(rc)) break; /* Housekeeping. */ paLSPages[iPage].fDirty = false; pVM->pgm.s.LiveSave.Mmio2.cDirtyPages--; pVM->pgm.s.LiveSave.Mmio2.cReadyPages++; if (u8Type == PGM_STATE_REC_MMIO2_ZERO) pVM->pgm.s.LiveSave.Mmio2.cZeroPages++; pVM->pgm.s.LiveSave.cSavedPages++; iPageLast = iPage; } pgmLock(pVM); } pgmUnlock(pVM); } return rc; } /** * Cleans up MMIO2 pages after a live save. * * @param pVM The VM handle. */ static void pgmR3DoneMmio2Pages(PVM pVM) { /* * Free the tracking structures for the MMIO2 pages. * We do the freeing outside the lock in case the VM is running. */ pgmLock(pVM); for (PPGMMMIO2RANGE pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) { void *pvMmio2ToFree = pMmio2->paLSPages; if (pvMmio2ToFree) { pMmio2->paLSPages = NULL; pgmUnlock(pVM); MMR3HeapFree(pvMmio2ToFree); pgmLock(pVM); } } pgmUnlock(pVM); } /** * Prepares the RAM pages for a live save. * * @returns VBox status code. * @param pVM The VM handle. */ static int pgmR3PrepRamPages(PVM pVM) { /* * Try allocating tracking structures for the ram ranges. * * To avoid lock contention, we leave the lock every time we're allocating * a new array. This means we'll have to ditch the allocation and start * all over again if the RAM range list changes in-between. * * Note! pgmR3SaveDone will always be called and it is therefore responsible * for cleaning up. */ PPGMRAMRANGE pCur; pgmLock(pVM); do { for (pCur = pVM->pgm.s.pRamRangesR3; pCur; pCur = pCur->pNextR3) { if ( !pCur->paLSPages && !PGM_RAM_RANGE_IS_AD_HOC(pCur)) { uint32_t const idRamRangesGen = pVM->pgm.s.idRamRangesGen; uint32_t const cPages = pCur->cb >> PAGE_SHIFT; pgmUnlock(pVM); PPGMLIVESAVERAMPAGE paLSPages = (PPGMLIVESAVERAMPAGE)MMR3HeapAllocZ(pVM, MM_TAG_PGM, cPages * sizeof(PGMLIVESAVERAMPAGE)); if (!paLSPages) return VERR_NO_MEMORY; pgmLock(pVM); if (pVM->pgm.s.idRamRangesGen != idRamRangesGen) { pgmUnlock(pVM); MMR3HeapFree(paLSPages); pgmLock(pVM); break; /* try again */ } pCur->paLSPages = paLSPages; /* * Initialize the array. */ uint32_t iPage = cPages; while (iPage-- > 0) { /** @todo yield critsect! (after moving this away from EMT0) */ PCPGMPAGE pPage = &pCur->aPages[iPage]; paLSPages[iPage].cDirtied = 0; paLSPages[iPage].fDirty = 1; /* everything is dirty at this time */ paLSPages[iPage].fWriteMonitored = 0; paLSPages[iPage].fWriteMonitoredJustNow = 0; paLSPages[iPage].u2Reserved = 0; switch (PGM_PAGE_GET_TYPE(pPage)) { case PGMPAGETYPE_RAM: if ( PGM_PAGE_IS_ZERO(pPage) || PGM_PAGE_IS_BALLOONED(pPage)) { paLSPages[iPage].fZero = 1; paLSPages[iPage].fShared = 0; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = PGM_STATE_CRC32_ZERO_PAGE; #endif } else if (PGM_PAGE_IS_SHARED(pPage)) { paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; #endif } else { paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 0; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; #endif } paLSPages[iPage].fIgnore = 0; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; break; case PGMPAGETYPE_ROM_SHADOW: case PGMPAGETYPE_ROM: { paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 0; paLSPages[iPage].fDirty = 0; paLSPages[iPage].fIgnore = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; #endif pVM->pgm.s.LiveSave.cIgnoredPages++; break; } default: AssertMsgFailed(("%R[pgmpage]", pPage)); case PGMPAGETYPE_MMIO2: case PGMPAGETYPE_MMIO2_ALIAS_MMIO: paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 0; paLSPages[iPage].fDirty = 0; paLSPages[iPage].fIgnore = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; #endif pVM->pgm.s.LiveSave.cIgnoredPages++; break; case PGMPAGETYPE_MMIO: paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 0; paLSPages[iPage].fDirty = 0; paLSPages[iPage].fIgnore = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; #endif pVM->pgm.s.LiveSave.cIgnoredPages++; break; } } } } } while (pCur); pgmUnlock(pVM); return VINF_SUCCESS; } /** * Saves the RAM configuration. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The saved state handle. */ static int pgmR3SaveRamConfig(PVM pVM, PSSMHANDLE pSSM) { uint32_t cbRamHole = 0; int rc = CFGMR3QueryU32Def(CFGMR3GetRoot(pVM), "RamHoleSize", &cbRamHole, MM_RAM_HOLE_SIZE_DEFAULT); AssertRCReturn(rc, rc); uint64_t cbRam = 0; rc = CFGMR3QueryU64Def(CFGMR3GetRoot(pVM), "RamSize", &cbRam, 0); AssertRCReturn(rc, rc); SSMR3PutU32(pSSM, cbRamHole); return SSMR3PutU64(pSSM, cbRam); } /** * Loads and verifies the RAM configuration. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The saved state handle. */ static int pgmR3LoadRamConfig(PVM pVM, PSSMHANDLE pSSM) { uint32_t cbRamHoleCfg = 0; int rc = CFGMR3QueryU32Def(CFGMR3GetRoot(pVM), "RamHoleSize", &cbRamHoleCfg, MM_RAM_HOLE_SIZE_DEFAULT); AssertRCReturn(rc, rc); uint64_t cbRamCfg = 0; rc = CFGMR3QueryU64Def(CFGMR3GetRoot(pVM), "RamSize", &cbRamCfg, 0); AssertRCReturn(rc, rc); uint32_t cbRamHoleSaved; SSMR3GetU32(pSSM, &cbRamHoleSaved); uint64_t cbRamSaved; rc = SSMR3GetU64(pSSM, &cbRamSaved); AssertRCReturn(rc, rc); if ( cbRamHoleCfg != cbRamHoleSaved || cbRamCfg != cbRamSaved) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Ram config mismatch: saved=%RX64/%RX32 config=%RX64/%RX32 (RAM/Hole)"), cbRamSaved, cbRamHoleSaved, cbRamCfg, cbRamHoleCfg); return VINF_SUCCESS; } #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 /** * Calculates the CRC-32 for a RAM page and updates the live save page tracking * info with it. * * @param pVM The VM handle. * @param pCur The current RAM range. * @param paLSPages The current array of live save page tracking * structures. * @param iPage The page index. */ static void pgmR3StateCalcCrc32ForRamPage(PVM pVM, PPGMRAMRANGE pCur, PPGMLIVESAVERAMPAGE paLSPages, uint32_t iPage) { RTGCPHYS GCPhys = pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); void const *pvPage; int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, &pCur->aPages[iPage], GCPhys, &pvPage); if (RT_SUCCESS(rc)) paLSPages[iPage].u32Crc = RTCrc32(pvPage, PAGE_SIZE); else paLSPages[iPage].u32Crc = UINT32_MAX; /* Invalid */ } /** * Verifies the CRC-32 for a page given it's raw bits. * * @param pvPage The page bits. * @param pCur The current RAM range. * @param paLSPages The current array of live save page tracking * structures. * @param iPage The page index. */ static void pgmR3StateVerifyCrc32ForPage(void const *pvPage, PPGMRAMRANGE pCur, PPGMLIVESAVERAMPAGE paLSPages, uint32_t iPage, const char *pszWhere) { if (paLSPages[iPage].u32Crc != UINT32_MAX) { uint32_t u32Crc = RTCrc32(pvPage, PAGE_SIZE); Assert( ( !PGM_PAGE_IS_ZERO(&pCur->aPages[iPage]) && !PGM_PAGE_IS_BALLOONED(&pCur->aPages[iPage])) || u32Crc == PGM_STATE_CRC32_ZERO_PAGE); AssertMsg(paLSPages[iPage].u32Crc == u32Crc, ("%08x != %08x for %RGp %R[pgmpage] %s\n", paLSPages[iPage].u32Crc, u32Crc, pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pCur->aPages[iPage], pszWhere)); } } /** * Verfies the CRC-32 for a RAM page. * * @param pVM The VM handle. * @param pCur The current RAM range. * @param paLSPages The current array of live save page tracking * structures. * @param iPage The page index. */ static void pgmR3StateVerifyCrc32ForRamPage(PVM pVM, PPGMRAMRANGE pCur, PPGMLIVESAVERAMPAGE paLSPages, uint32_t iPage, const char *pszWhere) { if (paLSPages[iPage].u32Crc != UINT32_MAX) { RTGCPHYS GCPhys = pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); void const *pvPage; int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, &pCur->aPages[iPage], GCPhys, &pvPage); if (RT_SUCCESS(rc)) pgmR3StateVerifyCrc32ForPage(pvPage, pCur, paLSPages, iPage, pszWhere); } } #endif /* PGMLIVESAVERAMPAGE_WITH_CRC32 */ /** * Scan for RAM page modifications and reprotect them. * * @param pVM The VM handle. * @param fFinalPass Whether this is the final pass or not. */ static void pgmR3ScanRamPages(PVM pVM, bool fFinalPass) { /* * The RAM. */ RTGCPHYS GCPhysCur = 0; PPGMRAMRANGE pCur; pgmLock(pVM); do { uint32_t const idRamRangesGen = pVM->pgm.s.idRamRangesGen; for (pCur = pVM->pgm.s.pRamRangesR3; pCur; pCur = pCur->pNextR3) { if ( pCur->GCPhysLast > GCPhysCur && !PGM_RAM_RANGE_IS_AD_HOC(pCur)) { PPGMLIVESAVERAMPAGE paLSPages = pCur->paLSPages; uint32_t cPages = pCur->cb >> PAGE_SHIFT; uint32_t iPage = GCPhysCur <= pCur->GCPhys ? 0 : (GCPhysCur - pCur->GCPhys) >> PAGE_SHIFT; GCPhysCur = 0; for (; iPage < cPages; iPage++) { /* Do yield first. */ if ( !fFinalPass #ifndef PGMLIVESAVERAMPAGE_WITH_CRC32 && (iPage & 0x7ff) == 0x100 #endif && PDMR3CritSectYield(&pVM->pgm.s.CritSect) && pVM->pgm.s.idRamRangesGen != idRamRangesGen) { GCPhysCur = pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); break; /* restart */ } /* Skip already ignored pages. */ if (paLSPages[iPage].fIgnore) continue; if (RT_LIKELY(PGM_PAGE_GET_TYPE(&pCur->aPages[iPage]) == PGMPAGETYPE_RAM)) { /* * A RAM page. */ switch (PGM_PAGE_GET_STATE(&pCur->aPages[iPage])) { case PGM_PAGE_STATE_ALLOCATED: /** @todo Optimize this: Don't always re-enable write * monitoring if the page is known to be very busy. */ if (PGM_PAGE_IS_WRITTEN_TO(&pCur->aPages[iPage])) { Assert(paLSPages[iPage].fWriteMonitored); PGM_PAGE_CLEAR_WRITTEN_TO(&pCur->aPages[iPage]); Assert(pVM->pgm.s.cWrittenToPages > 0); pVM->pgm.s.cWrittenToPages--; } else { Assert(!paLSPages[iPage].fWriteMonitored); pVM->pgm.s.LiveSave.Ram.cMonitoredPages++; } if (!paLSPages[iPage].fDirty) { pVM->pgm.s.LiveSave.Ram.cReadyPages--; if (paLSPages[iPage].fZero) pVM->pgm.s.LiveSave.Ram.cZeroPages--; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; if (++paLSPages[iPage].cDirtied > PGMLIVSAVEPAGE_MAX_DIRTIED) paLSPages[iPage].cDirtied = PGMLIVSAVEPAGE_MAX_DIRTIED; } PGM_PAGE_SET_STATE(&pCur->aPages[iPage], PGM_PAGE_STATE_WRITE_MONITORED); pVM->pgm.s.cMonitoredPages++; paLSPages[iPage].fWriteMonitored = 1; paLSPages[iPage].fWriteMonitoredJustNow = 1; paLSPages[iPage].fDirty = 1; paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 0; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; /* invalid */ #endif break; case PGM_PAGE_STATE_WRITE_MONITORED: Assert(paLSPages[iPage].fWriteMonitored); if (PGM_PAGE_GET_WRITE_LOCKS(&pCur->aPages[iPage]) == 0) { #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 if (paLSPages[iPage].fWriteMonitoredJustNow) pgmR3StateCalcCrc32ForRamPage(pVM, pCur, paLSPages, iPage); else pgmR3StateVerifyCrc32ForRamPage(pVM, pCur, paLSPages, iPage, "scan"); #endif paLSPages[iPage].fWriteMonitoredJustNow = 0; } else { paLSPages[iPage].fWriteMonitoredJustNow = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = UINT32_MAX; /* invalid */ #endif if (!paLSPages[iPage].fDirty) { pVM->pgm.s.LiveSave.Ram.cReadyPages--; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; if (++paLSPages[iPage].cDirtied > PGMLIVSAVEPAGE_MAX_DIRTIED) paLSPages[iPage].cDirtied = PGMLIVSAVEPAGE_MAX_DIRTIED; } } break; case PGM_PAGE_STATE_ZERO: if (!paLSPages[iPage].fZero) { if (!paLSPages[iPage].fDirty) { paLSPages[iPage].fDirty = 1; pVM->pgm.s.LiveSave.Ram.cReadyPages--; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; } paLSPages[iPage].fZero = 1; paLSPages[iPage].fShared = 0; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = PGM_STATE_CRC32_ZERO_PAGE; #endif } break; case PGM_PAGE_STATE_BALLOONED: if (!paLSPages[iPage].fZero) { if (!paLSPages[iPage].fDirty) { paLSPages[iPage].fDirty = 1; pVM->pgm.s.LiveSave.Ram.cReadyPages--; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; } paLSPages[iPage].fZero = 1; paLSPages[iPage].fShared = 0; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 paLSPages[iPage].u32Crc = PGM_STATE_CRC32_ZERO_PAGE; #endif } break; case PGM_PAGE_STATE_SHARED: if (!paLSPages[iPage].fShared) { if (!paLSPages[iPage].fDirty) { paLSPages[iPage].fDirty = 1; pVM->pgm.s.LiveSave.Ram.cReadyPages--; if (paLSPages[iPage].fZero) pVM->pgm.s.LiveSave.Ram.cZeroPages--; pVM->pgm.s.LiveSave.Ram.cDirtyPages++; } paLSPages[iPage].fZero = 0; paLSPages[iPage].fShared = 1; #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 pgmR3StateCalcCrc32ForRamPage(pVM, pCur, paLSPages, iPage); #endif } break; } } else { /* * All other types => Ignore the page. */ Assert(!paLSPages[iPage].fIgnore); /* skipped before switch */ paLSPages[iPage].fIgnore = 1; if (paLSPages[iPage].fWriteMonitored) { /** @todo this doesn't hold water when we start monitoring MMIO2 and ROM shadow * pages! */ if (RT_UNLIKELY(PGM_PAGE_GET_STATE(&pCur->aPages[iPage]) == PGM_PAGE_STATE_WRITE_MONITORED)) { AssertMsgFailed(("%R[pgmpage]", &pCur->aPages[iPage])); /* shouldn't happen. */ PGM_PAGE_SET_STATE(&pCur->aPages[iPage], PGM_PAGE_STATE_ALLOCATED); Assert(pVM->pgm.s.cMonitoredPages > 0); pVM->pgm.s.cMonitoredPages--; } if (PGM_PAGE_IS_WRITTEN_TO(&pCur->aPages[iPage])) { PGM_PAGE_CLEAR_WRITTEN_TO(&pCur->aPages[iPage]); Assert(pVM->pgm.s.cWrittenToPages > 0); pVM->pgm.s.cWrittenToPages--; } pVM->pgm.s.LiveSave.Ram.cMonitoredPages--; } /** @todo the counting doesn't quite work out here. fix later? */ if (paLSPages[iPage].fDirty) pVM->pgm.s.LiveSave.Ram.cDirtyPages--; else { pVM->pgm.s.LiveSave.Ram.cReadyPages--; if (paLSPages[iPage].fZero) pVM->pgm.s.LiveSave.Ram.cZeroPages--; } pVM->pgm.s.LiveSave.cIgnoredPages++; } } /* for each page in range */ if (GCPhysCur != 0) break; /* Yield + ramrange change */ GCPhysCur = pCur->GCPhysLast; } } /* for each range */ } while (pCur); pgmUnlock(pVM); } /** * Save quiescent RAM pages. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The SSM handle. * @param fLiveSave Whether it's a live save or not. * @param uPass The pass number. */ static int pgmR3SaveRamPages(PVM pVM, PSSMHANDLE pSSM, bool fLiveSave, uint32_t uPass) { /* * The RAM. */ RTGCPHYS GCPhysLast = NIL_RTGCPHYS; RTGCPHYS GCPhysCur = 0; PPGMRAMRANGE pCur; bool fFTMDeltaSaveActive = FTMIsDeltaLoadSaveActive(pVM); pgmLock(pVM); do { uint32_t const idRamRangesGen = pVM->pgm.s.idRamRangesGen; for (pCur = pVM->pgm.s.pRamRangesR3; pCur; pCur = pCur->pNextR3) { if ( pCur->GCPhysLast > GCPhysCur && !PGM_RAM_RANGE_IS_AD_HOC(pCur)) { PPGMLIVESAVERAMPAGE paLSPages = pCur->paLSPages; uint32_t cPages = pCur->cb >> PAGE_SHIFT; uint32_t iPage = GCPhysCur <= pCur->GCPhys ? 0 : (GCPhysCur - pCur->GCPhys) >> PAGE_SHIFT; GCPhysCur = 0; for (; iPage < cPages; iPage++) { /* Do yield first. */ if ( uPass != SSM_PASS_FINAL && (iPage & 0x7ff) == 0x100 && PDMR3CritSectYield(&pVM->pgm.s.CritSect) && pVM->pgm.s.idRamRangesGen != idRamRangesGen) { GCPhysCur = pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); break; /* restart */ } PPGMPAGE pCurPage = &pCur->aPages[iPage]; /* * Only save pages that haven't changed since last scan and are dirty. */ if ( uPass != SSM_PASS_FINAL && paLSPages) { if (!paLSPages[iPage].fDirty) continue; if (paLSPages[iPage].fWriteMonitoredJustNow) continue; if (paLSPages[iPage].fIgnore) continue; if (PGM_PAGE_GET_TYPE(pCurPage) != PGMPAGETYPE_RAM) /* in case of recent remappings */ continue; if ( PGM_PAGE_GET_STATE(pCurPage) != ( paLSPages[iPage].fZero ? PGM_PAGE_STATE_ZERO : paLSPages[iPage].fShared ? PGM_PAGE_STATE_SHARED : PGM_PAGE_STATE_WRITE_MONITORED)) continue; if (PGM_PAGE_GET_WRITE_LOCKS(&pCur->aPages[iPage]) > 0) continue; } else { if ( paLSPages && !paLSPages[iPage].fDirty && !paLSPages[iPage].fIgnore) { #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 if (PGM_PAGE_GET_TYPE(pCurPage) != PGMPAGETYPE_RAM) pgmR3StateVerifyCrc32ForRamPage(pVM, pCur, paLSPages, iPage, "save#1"); #endif continue; } if (PGM_PAGE_GET_TYPE(pCurPage) != PGMPAGETYPE_RAM) continue; } /* * Do the saving outside the PGM critsect since SSM may block on I/O. */ int rc; RTGCPHYS GCPhys = pCur->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); bool fZero = PGM_PAGE_IS_ZERO(pCurPage) || PGM_PAGE_IS_BALLOONED(pCurPage); bool fSkipped = false; if (!fZero) { /* * Copy the page and then save it outside the lock (since any * SSM call may block). */ uint8_t abPage[PAGE_SIZE]; void const *pvPage; rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, pCurPage, GCPhys, &pvPage); if (RT_SUCCESS(rc)) { memcpy(abPage, pvPage, PAGE_SIZE); #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 if (paLSPages) pgmR3StateVerifyCrc32ForPage(abPage, pCur, paLSPages, iPage, "save#3"); #endif } pgmUnlock(pVM); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc GCPhys=%RGp\n", rc, GCPhys), rc); /* Try save some memory when restoring. */ if (!ASMMemIsZeroPage(pvPage)) { if (fFTMDeltaSaveActive) { if ( PGM_PAGE_IS_WRITTEN_TO(pCurPage) || PGM_PAGE_IS_FT_DIRTY(pCurPage)) { if (GCPhys == GCPhysLast + PAGE_SIZE) SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_RAW); else { SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_RAW | PGM_STATE_REC_FLAG_ADDR); SSMR3PutGCPhys(pSSM, GCPhys); } rc = SSMR3PutMem(pSSM, abPage, PAGE_SIZE); PGM_PAGE_CLEAR_WRITTEN_TO(pCurPage); PGM_PAGE_CLEAR_FT_DIRTY(pCurPage); } /* else nothing changed, so skip it. */ else fSkipped = true; } else { if (GCPhys == GCPhysLast + PAGE_SIZE) SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_RAW); else { SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_RAW | PGM_STATE_REC_FLAG_ADDR); SSMR3PutGCPhys(pSSM, GCPhys); } rc = SSMR3PutMem(pSSM, abPage, PAGE_SIZE); } } else { if (GCPhys == GCPhysLast + PAGE_SIZE) rc = SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_ZERO); else { SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_ZERO | PGM_STATE_REC_FLAG_ADDR); rc = SSMR3PutGCPhys(pSSM, GCPhys); } } } else { /* * Dirty zero page. */ #ifdef PGMLIVESAVERAMPAGE_WITH_CRC32 if (paLSPages) pgmR3StateVerifyCrc32ForRamPage(pVM, pCur, paLSPages, iPage, "save#2"); #endif pgmUnlock(pVM); if (GCPhys == GCPhysLast + PAGE_SIZE) rc = SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_ZERO); else { SSMR3PutU8(pSSM, PGM_STATE_REC_RAM_ZERO | PGM_STATE_REC_FLAG_ADDR); rc = SSMR3PutGCPhys(pSSM, GCPhys); } } if (RT_FAILURE(rc)) return rc; pgmLock(pVM); if (!fSkipped) GCPhysLast = GCPhys; if (paLSPages) { paLSPages[iPage].fDirty = 0; pVM->pgm.s.LiveSave.Ram.cReadyPages++; if (fZero) pVM->pgm.s.LiveSave.Ram.cZeroPages++; pVM->pgm.s.LiveSave.Ram.cDirtyPages--; pVM->pgm.s.LiveSave.cSavedPages++; } if (idRamRangesGen != pVM->pgm.s.idRamRangesGen) { GCPhysCur = GCPhys | PAGE_OFFSET_MASK; break; /* restart */ } } /* for each page in range */ if (GCPhysCur != 0) break; /* Yield + ramrange change */ GCPhysCur = pCur->GCPhysLast; } } /* for each range */ } while (pCur); pgmUnlock(pVM); return VINF_SUCCESS; } /** * Cleans up RAM pages after a live save. * * @param pVM The VM handle. */ static void pgmR3DoneRamPages(PVM pVM) { /* * Free the tracking arrays and disable write monitoring. * * Play nice with the PGM lock in case we're called while the VM is still * running. This means we have to delay the freeing since we wish to use * paLSPages as an indicator of which RAM ranges which we need to scan for * write monitored pages. */ void *pvToFree = NULL; PPGMRAMRANGE pCur; uint32_t cMonitoredPages = 0; pgmLock(pVM); do { for (pCur = pVM->pgm.s.pRamRangesR3; pCur; pCur = pCur->pNextR3) { if (pCur->paLSPages) { if (pvToFree) { uint32_t idRamRangesGen = pVM->pgm.s.idRamRangesGen; pgmUnlock(pVM); MMR3HeapFree(pvToFree); pvToFree = NULL; pgmLock(pVM); if (idRamRangesGen != pVM->pgm.s.idRamRangesGen) break; /* start over again. */ } pvToFree = pCur->paLSPages; pCur->paLSPages = NULL; uint32_t iPage = pCur->cb >> PAGE_SHIFT; while (iPage--) { PPGMPAGE pPage = &pCur->aPages[iPage]; PGM_PAGE_CLEAR_WRITTEN_TO(pPage); if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED) { PGM_PAGE_SET_STATE(pPage, PGM_PAGE_STATE_ALLOCATED); cMonitoredPages++; } } } } } while (pCur); Assert(pVM->pgm.s.cMonitoredPages >= cMonitoredPages); if (pVM->pgm.s.cMonitoredPages < cMonitoredPages) pVM->pgm.s.cMonitoredPages = 0; else pVM->pgm.s.cMonitoredPages -= cMonitoredPages; pgmUnlock(pVM); MMR3HeapFree(pvToFree); pvToFree = NULL; } /** * Execute a live save pass. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The SSM handle. */ static DECLCALLBACK(int) pgmR3LiveExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { int rc; /* * Save the MMIO2 and ROM range IDs in pass 0. */ if (uPass == 0) { rc = pgmR3SaveRamConfig(pVM, pSSM); if (RT_FAILURE(rc)) return rc; rc = pgmR3SaveRomRanges(pVM, pSSM); if (RT_FAILURE(rc)) return rc; rc = pgmR3SaveMmio2Ranges(pVM, pSSM); if (RT_FAILURE(rc)) return rc; } /* * Reset the page-per-second estimate to avoid inflation by the initial * load of zero pages. pgmR3LiveVote ASSUMES this is done at pass 7. */ else if (uPass == 7) { pVM->pgm.s.LiveSave.cSavedPages = 0; pVM->pgm.s.LiveSave.uSaveStartNS = RTTimeNanoTS(); } /* * Do the scanning. */ pgmR3ScanRomPages(pVM); pgmR3ScanMmio2Pages(pVM, uPass); pgmR3ScanRamPages(pVM, false /*fFinalPass*/); pgmR3PoolClearAll(pVM, true /*fFlushRemTlb*/); /** @todo this could perhaps be optimized a bit. */ /* * Save the pages. */ if (uPass == 0) rc = pgmR3SaveRomVirginPages( pVM, pSSM, true /*fLiveSave*/); else rc = VINF_SUCCESS; if (RT_SUCCESS(rc)) rc = pgmR3SaveShadowedRomPages(pVM, pSSM, true /*fLiveSave*/, false /*fFinalPass*/); if (RT_SUCCESS(rc)) rc = pgmR3SaveMmio2Pages( pVM, pSSM, true /*fLiveSave*/, uPass); if (RT_SUCCESS(rc)) rc = pgmR3SaveRamPages( pVM, pSSM, true /*fLiveSave*/, uPass); SSMR3PutU8(pSSM, PGM_STATE_REC_END); /* (Ignore the rc, SSM takes care of it.) */ return rc; } /** * Votes on whether the live save phase is done or not. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The SSM handle. * @param uPass The data pass. */ static DECLCALLBACK(int) pgmR3LiveVote(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { /* * Update and calculate parameters used in the decision making. */ const uint32_t cHistoryEntries = RT_ELEMENTS(pVM->pgm.s.LiveSave.acDirtyPagesHistory); /* update history. */ pgmLock(pVM); uint32_t const cWrittenToPages = pVM->pgm.s.cWrittenToPages; pgmUnlock(pVM); uint32_t const cDirtyNow = pVM->pgm.s.LiveSave.Rom.cDirtyPages + pVM->pgm.s.LiveSave.Mmio2.cDirtyPages + pVM->pgm.s.LiveSave.Ram.cDirtyPages + cWrittenToPages; uint32_t i = pVM->pgm.s.LiveSave.iDirtyPagesHistory; pVM->pgm.s.LiveSave.acDirtyPagesHistory[i] = cDirtyNow; pVM->pgm.s.LiveSave.iDirtyPagesHistory = (i + 1) % cHistoryEntries; /* calc shortterm average (4 passes). */ AssertCompile(RT_ELEMENTS(pVM->pgm.s.LiveSave.acDirtyPagesHistory) > 4); uint64_t cTotal = pVM->pgm.s.LiveSave.acDirtyPagesHistory[i]; cTotal += pVM->pgm.s.LiveSave.acDirtyPagesHistory[(i + cHistoryEntries - 1) % cHistoryEntries]; cTotal += pVM->pgm.s.LiveSave.acDirtyPagesHistory[(i + cHistoryEntries - 2) % cHistoryEntries]; cTotal += pVM->pgm.s.LiveSave.acDirtyPagesHistory[(i + cHistoryEntries - 3) % cHistoryEntries]; uint32_t const cDirtyPagesShort = cTotal / 4; pVM->pgm.s.LiveSave.cDirtyPagesShort = cDirtyPagesShort; /* calc longterm average. */ cTotal = 0; if (uPass < cHistoryEntries) for (i = 0; i < cHistoryEntries && i <= uPass; i++) cTotal += pVM->pgm.s.LiveSave.acDirtyPagesHistory[i]; else for (i = 0; i < cHistoryEntries; i++) cTotal += pVM->pgm.s.LiveSave.acDirtyPagesHistory[i]; uint32_t const cDirtyPagesLong = cTotal / cHistoryEntries; pVM->pgm.s.LiveSave.cDirtyPagesLong = cDirtyPagesLong; /* estimate the speed */ uint64_t cNsElapsed = RTTimeNanoTS() - pVM->pgm.s.LiveSave.uSaveStartNS; uint32_t cPagesPerSecond = (uint32_t)( pVM->pgm.s.LiveSave.cSavedPages / ((long double)cNsElapsed / 1000000000.0) ); pVM->pgm.s.LiveSave.cPagesPerSecond = cPagesPerSecond; /* * Try make a decision. */ if ( cDirtyPagesShort <= cDirtyPagesLong && ( cDirtyNow <= cDirtyPagesShort || cDirtyNow - cDirtyPagesShort < RT_MIN(cDirtyPagesShort / 8, 16) ) ) { if (uPass > 10) { uint32_t cMsLeftShort = (uint32_t)(cDirtyPagesShort / (long double)cPagesPerSecond * 1000.0); uint32_t cMsLeftLong = (uint32_t)(cDirtyPagesLong / (long double)cPagesPerSecond * 1000.0); uint32_t cMsMaxDowntime = SSMR3HandleMaxDowntime(pSSM); if (cMsMaxDowntime < 32) cMsMaxDowntime = 32; if ( ( cMsLeftLong <= cMsMaxDowntime && cMsLeftShort < cMsMaxDowntime) || cMsLeftShort < cMsMaxDowntime / 2 ) { Log(("pgmR3LiveVote: VINF_SUCCESS - pass=%d cDirtyPagesShort=%u|%ums cDirtyPagesLong=%u|%ums cMsMaxDowntime=%u\n", uPass, cDirtyPagesShort, cMsLeftShort, cDirtyPagesLong, cMsLeftLong, cMsMaxDowntime)); return VINF_SUCCESS; } } else { if ( ( cDirtyPagesShort <= 128 && cDirtyPagesLong <= 1024) || cDirtyPagesLong <= 256 ) { Log(("pgmR3LiveVote: VINF_SUCCESS - pass=%d cDirtyPagesShort=%u cDirtyPagesLong=%u\n", uPass, cDirtyPagesShort, cDirtyPagesLong)); return VINF_SUCCESS; } } } /* * Come up with a completion percentage. Currently this is a simple * dirty page (long term) vs. total pages ratio + some pass trickery. */ unsigned uPctDirty = (unsigned)( (long double)cDirtyPagesLong / (pVM->pgm.s.cAllPages - pVM->pgm.s.LiveSave.cIgnoredPages - pVM->pgm.s.cZeroPages) ); if (uPctDirty <= 100) SSMR3HandleReportLivePercent(pSSM, RT_MIN(100 - uPctDirty, uPass * 2)); else AssertMsgFailed(("uPctDirty=%u cDirtyPagesLong=%#x cAllPages=%#x cIgnoredPages=%#x cZeroPages=%#x\n", uPctDirty, cDirtyPagesLong, pVM->pgm.s.cAllPages, pVM->pgm.s.LiveSave.cIgnoredPages, pVM->pgm.s.cZeroPages)); return VINF_SSM_VOTE_FOR_ANOTHER_PASS; } /** * Prepare for a live save operation. * * This will attempt to allocate and initialize the tracking structures. It * will also prepare for write monitoring of pages and initialize PGM::LiveSave. * pgmR3SaveDone will do the cleanups. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The SSM handle. */ static DECLCALLBACK(int) pgmR3LivePrep(PVM pVM, PSSMHANDLE pSSM) { /* * Indicate that we will be using the write monitoring. */ pgmLock(pVM); /** @todo find a way of mediating this when more users are added. */ if (pVM->pgm.s.fPhysWriteMonitoringEngaged) { pgmUnlock(pVM); AssertLogRelFailedReturn(VERR_INTERNAL_ERROR_2); } pVM->pgm.s.fPhysWriteMonitoringEngaged = true; pgmUnlock(pVM); /* * Initialize the statistics. */ pVM->pgm.s.LiveSave.Rom.cReadyPages = 0; pVM->pgm.s.LiveSave.Rom.cDirtyPages = 0; pVM->pgm.s.LiveSave.Mmio2.cReadyPages = 0; pVM->pgm.s.LiveSave.Mmio2.cDirtyPages = 0; pVM->pgm.s.LiveSave.Ram.cReadyPages = 0; pVM->pgm.s.LiveSave.Ram.cDirtyPages = 0; pVM->pgm.s.LiveSave.cIgnoredPages = 0; pVM->pgm.s.LiveSave.fActive = true; for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.LiveSave.acDirtyPagesHistory); i++) pVM->pgm.s.LiveSave.acDirtyPagesHistory[i] = UINT32_MAX / 2; pVM->pgm.s.LiveSave.iDirtyPagesHistory = 0; pVM->pgm.s.LiveSave.cSavedPages = 0; pVM->pgm.s.LiveSave.uSaveStartNS = RTTimeNanoTS(); pVM->pgm.s.LiveSave.cPagesPerSecond = 8192; /* * Per page type. */ int rc = pgmR3PrepRomPages(pVM); if (RT_SUCCESS(rc)) rc = pgmR3PrepMmio2Pages(pVM); if (RT_SUCCESS(rc)) rc = pgmR3PrepRamPages(pVM); return rc; } /** * Execute state save operation. * * @returns VBox status code. * @param pVM VM Handle. * @param pSSM SSM operation handle. */ static DECLCALLBACK(int) pgmR3SaveExec(PVM pVM, PSSMHANDLE pSSM) { int rc; unsigned i; PPGM pPGM = &pVM->pgm.s; /* * Lock PGM and set the no-more-writes indicator. */ pgmLock(pVM); pVM->pgm.s.fNoMorePhysWrites = true; /* * Save basic data (required / unaffected by relocation). */ bool const fMappingsFixed = pVM->pgm.s.fMappingsFixed; pVM->pgm.s.fMappingsFixed |= pVM->pgm.s.fMappingsFixedRestored; SSMR3PutStruct(pSSM, pPGM, &s_aPGMFields[0]); pVM->pgm.s.fMappingsFixed = fMappingsFixed; for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++) SSMR3PutStruct(pSSM, &pVM->aCpus[idCpu].pgm.s, &s_aPGMCpuFields[0]); /* * The guest mappings. */ i = 0; for (PPGMMAPPING pMapping = pPGM->pMappingsR3; pMapping; pMapping = pMapping->pNextR3, i++) { SSMR3PutU32( pSSM, i); SSMR3PutStrZ( pSSM, pMapping->pszDesc); /* This is the best unique id we have... */ SSMR3PutGCPtr( pSSM, pMapping->GCPtr); SSMR3PutGCUIntPtr(pSSM, pMapping->cPTs); } rc = SSMR3PutU32(pSSM, ~0); /* terminator. */ /* * Save the (remainder of the) memory. */ if (RT_SUCCESS(rc)) { if (pVM->pgm.s.LiveSave.fActive) { pgmR3ScanRomPages(pVM); pgmR3ScanMmio2Pages(pVM, SSM_PASS_FINAL); pgmR3ScanRamPages(pVM, true /*fFinalPass*/); rc = pgmR3SaveShadowedRomPages( pVM, pSSM, true /*fLiveSave*/, true /*fFinalPass*/); if (RT_SUCCESS(rc)) rc = pgmR3SaveMmio2Pages( pVM, pSSM, true /*fLiveSave*/, SSM_PASS_FINAL); if (RT_SUCCESS(rc)) rc = pgmR3SaveRamPages( pVM, pSSM, true /*fLiveSave*/, SSM_PASS_FINAL); } else { rc = pgmR3SaveRamConfig(pVM, pSSM); if (RT_SUCCESS(rc)) rc = pgmR3SaveRomRanges(pVM, pSSM); if (RT_SUCCESS(rc)) rc = pgmR3SaveMmio2Ranges(pVM, pSSM); if (RT_SUCCESS(rc)) rc = pgmR3SaveRomVirginPages( pVM, pSSM, false /*fLiveSave*/); if (RT_SUCCESS(rc)) rc = pgmR3SaveShadowedRomPages(pVM, pSSM, false /*fLiveSave*/, true /*fFinalPass*/); if (RT_SUCCESS(rc)) rc = pgmR3SaveMmio2Pages( pVM, pSSM, false /*fLiveSave*/, SSM_PASS_FINAL); if (RT_SUCCESS(rc)) rc = pgmR3SaveRamPages( pVM, pSSM, false /*fLiveSave*/, SSM_PASS_FINAL); } SSMR3PutU8(pSSM, PGM_STATE_REC_END); /* (Ignore the rc, SSM takes of it.) */ } pgmUnlock(pVM); return rc; } /** * Cleans up after an save state operation. * * @returns VBox status code. * @param pVM VM Handle. * @param pSSM SSM operation handle. */ static DECLCALLBACK(int) pgmR3SaveDone(PVM pVM, PSSMHANDLE pSSM) { /* * Do per page type cleanups first. */ if (pVM->pgm.s.LiveSave.fActive) { pgmR3DoneRomPages(pVM); pgmR3DoneMmio2Pages(pVM); pgmR3DoneRamPages(pVM); } /* * Clear the live save indicator and disengage write monitoring. */ pgmLock(pVM); pVM->pgm.s.LiveSave.fActive = false; /** @todo this is blindly assuming that we're the only user of write * monitoring. Fix this when more users are added. */ pVM->pgm.s.fPhysWriteMonitoringEngaged = false; pgmUnlock(pVM); return VINF_SUCCESS; } /** * Prepare state load operation. * * @returns VBox status code. * @param pVM VM Handle. * @param pSSM SSM operation handle. */ static DECLCALLBACK(int) pgmR3LoadPrep(PVM pVM, PSSMHANDLE pSSM) { /* * Call the reset function to make sure all the memory is cleared. */ PGMR3Reset(pVM); pVM->pgm.s.LiveSave.fActive = false; NOREF(pSSM); return VINF_SUCCESS; } /** * Load an ignored page. * * @returns VBox status code. * @param pSSM The saved state handle. */ static int pgmR3LoadPageToDevNullOld(PSSMHANDLE pSSM) { uint8_t abPage[PAGE_SIZE]; return SSMR3GetMem(pSSM, &abPage[0], sizeof(abPage)); } /** * Loads a page without any bits in the saved state, i.e. making sure it's * really zero. * * @returns VBox status code. * @param pVM The VM handle. * @param uType The page type or PGMPAGETYPE_INVALID (old saved * state). * @param pPage The guest page tracking structure. * @param GCPhys The page address. * @param pRam The ram range (logging). */ static int pgmR3LoadPageZeroOld(PVM pVM, uint8_t uType, PPGMPAGE pPage, RTGCPHYS GCPhys, PPGMRAMRANGE pRam) { if ( PGM_PAGE_GET_TYPE(pPage) != uType && uType != PGMPAGETYPE_INVALID) return VERR_SSM_UNEXPECTED_DATA; /* I think this should be sufficient. */ if ( !PGM_PAGE_IS_ZERO(pPage) && !PGM_PAGE_IS_BALLOONED(pPage)) return VERR_SSM_UNEXPECTED_DATA; NOREF(pVM); NOREF(GCPhys); NOREF(pRam); return VINF_SUCCESS; } /** * Loads a page from the saved state. * * @returns VBox status code. * @param pVM The VM handle. * @param pSSM The SSM handle. * @param uType The page type or PGMPAGETYEP_INVALID (old saved * state). * @param pPage The guest page tracking structure. * @param GCPhys The page address. * @param pRam The ram range (logging). */ static int pgmR3LoadPageBitsOld(PVM pVM, PSSMHANDLE pSSM, uint8_t uType, PPGMPAGE pPage, RTGCPHYS GCPhys, PPGMRAMRANGE pRam) { /* * Match up the type, dealing with MMIO2 aliases (dropped). */ AssertLogRelMsgReturn( PGM_PAGE_GET_TYPE(pPage) == uType || uType == PGMPAGETYPE_INVALID, ("pPage=%R[pgmpage] GCPhys=%#x %s\n", pPage, GCPhys, pRam->pszDesc), VERR_SSM_UNEXPECTED_DATA); /* * Load the page. */ void *pvPage; int rc = pgmPhysGCPhys2CCPtrInternal(pVM, pPage, GCPhys, &pvPage); if (RT_SUCCESS(rc)) rc = SSMR3GetMem(pSSM, pvPage, PAGE_SIZE); return rc; } /** * Loads a page (counter part to pgmR3SavePage). * * @returns VBox status code, fully bitched errors. * @param pVM The VM handle. * @param pSSM The SSM handle. * @param uType The page type. * @param pPage The page. * @param GCPhys The page address. * @param pRam The RAM range (for error messages). */ static int pgmR3LoadPageOld(PVM pVM, PSSMHANDLE pSSM, uint8_t uType, PPGMPAGE pPage, RTGCPHYS GCPhys, PPGMRAMRANGE pRam) { uint8_t uState; int rc = SSMR3GetU8(pSSM, &uState); AssertLogRelMsgRCReturn(rc, ("pPage=%R[pgmpage] GCPhys=%#x %s rc=%Rrc\n", pPage, GCPhys, pRam->pszDesc, rc), rc); if (uState == 0 /* zero */) rc = pgmR3LoadPageZeroOld(pVM, uType, pPage, GCPhys, pRam); else if (uState == 1) rc = pgmR3LoadPageBitsOld(pVM, pSSM, uType, pPage, GCPhys, pRam); else rc = VERR_INTERNAL_ERROR; AssertLogRelMsgRCReturn(rc, ("pPage=%R[pgmpage] uState=%d uType=%d GCPhys=%RGp %s rc=%Rrc\n", pPage, uState, uType, GCPhys, pRam->pszDesc, rc), rc); return VINF_SUCCESS; } /** * Loads a shadowed ROM page. * * @returns VBox status code, errors are fully bitched. * @param pVM The VM handle. * @param pSSM The saved state handle. * @param pPage The page. * @param GCPhys The page address. * @param pRam The RAM range (for error messages). */ static int pgmR3LoadShadowedRomPageOld(PVM pVM, PSSMHANDLE pSSM, PPGMPAGE pPage, RTGCPHYS GCPhys, PPGMRAMRANGE pRam) { /* * Load and set the protection first, then load the two pages, the first * one is the active the other is the passive. */ PPGMROMPAGE pRomPage = pgmR3GetRomPage(pVM, GCPhys); AssertLogRelMsgReturn(pRomPage, ("GCPhys=%RGp %s\n", GCPhys, pRam->pszDesc), VERR_INTERNAL_ERROR); uint8_t uProt; int rc = SSMR3GetU8(pSSM, &uProt); AssertLogRelMsgRCReturn(rc, ("pPage=%R[pgmpage] GCPhys=%#x %s\n", pPage, GCPhys, pRam->pszDesc), rc); PGMROMPROT enmProt = (PGMROMPROT)uProt; AssertLogRelMsgReturn( enmProt >= PGMROMPROT_INVALID && enmProt < PGMROMPROT_END, ("enmProt=%d pPage=%R[pgmpage] GCPhys=%#x %s\n", enmProt, pPage, GCPhys, pRam->pszDesc), VERR_SSM_UNEXPECTED_DATA); if (pRomPage->enmProt != enmProt) { rc = PGMR3PhysRomProtect(pVM, GCPhys, PAGE_SIZE, enmProt); AssertLogRelRCReturn(rc, rc); AssertLogRelReturn(pRomPage->enmProt == enmProt, VERR_INTERNAL_ERROR); } PPGMPAGE pPageActive = PGMROMPROT_IS_ROM(enmProt) ? &pRomPage->Virgin : &pRomPage->Shadow; PPGMPAGE pPagePassive = PGMROMPROT_IS_ROM(enmProt) ? &pRomPage->Shadow : &pRomPage->Virgin; uint8_t u8ActiveType = PGMROMPROT_IS_ROM(enmProt) ? PGMPAGETYPE_ROM : PGMPAGETYPE_ROM_SHADOW; uint8_t u8PassiveType= PGMROMPROT_IS_ROM(enmProt) ? PGMPAGETYPE_ROM_SHADOW : PGMPAGETYPE_ROM; /** @todo this isn't entirely correct as long as pgmPhysGCPhys2CCPtrInternal is * used down the line (will the 2nd page will be written to the first * one because of a false TLB hit since the TLB is using GCPhys and * doesn't check the HCPhys of the desired page). */ rc = pgmR3LoadPageOld(pVM, pSSM, u8ActiveType, pPage, GCPhys, pRam); if (RT_SUCCESS(rc)) { *pPageActive = *pPage; rc = pgmR3LoadPageOld(pVM, pSSM, u8PassiveType, pPagePassive, GCPhys, pRam); } return rc; } /** * Ram range flags and bits for older versions of the saved state. * * @returns VBox status code. * * @param pVM The VM handle * @param pSSM The SSM handle. * @param uVersion The saved state version. */ static int pgmR3LoadMemoryOld(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion) { PPGM pPGM = &pVM->pgm.s; /* * Ram range flags and bits. */ uint32_t i = 0; for (PPGMRAMRANGE pRam = pPGM->pRamRangesR3; ; pRam = pRam->pNextR3, i++) { /* Check the seqence number / separator. */ uint32_t u32Sep; int rc = SSMR3GetU32(pSSM, &u32Sep); if (RT_FAILURE(rc)) return rc; if (u32Sep == ~0U) break; if (u32Sep != i) { AssertMsgFailed(("u32Sep=%#x (last)\n", u32Sep)); return VERR_SSM_DATA_UNIT_FORMAT_CHANGED; } AssertLogRelReturn(pRam, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); /* Get the range details. */ RTGCPHYS GCPhys; SSMR3GetGCPhys(pSSM, &GCPhys); RTGCPHYS GCPhysLast; SSMR3GetGCPhys(pSSM, &GCPhysLast); RTGCPHYS cb; SSMR3GetGCPhys(pSSM, &cb); uint8_t fHaveBits; rc = SSMR3GetU8(pSSM, &fHaveBits); if (RT_FAILURE(rc)) return rc; if (fHaveBits & ~1) { AssertMsgFailed(("u32Sep=%#x (last)\n", u32Sep)); return VERR_SSM_DATA_UNIT_FORMAT_CHANGED; } size_t cchDesc = 0; char szDesc[256]; szDesc[0] = '\0'; if (uVersion >= PGM_SAVED_STATE_VERSION_RR_DESC) { rc = SSMR3GetStrZ(pSSM, szDesc, sizeof(szDesc)); if (RT_FAILURE(rc)) return rc; /* Since we've modified the description strings in r45878, only compare them if the saved state is more recent. */ if (uVersion != PGM_SAVED_STATE_VERSION_RR_DESC) cchDesc = strlen(szDesc); } /* * Match it up with the current range. * * Note there is a hack for dealing with the high BIOS mapping * in the old saved state format, this means we might not have * a 1:1 match on success. */ if ( ( GCPhys != pRam->GCPhys || GCPhysLast != pRam->GCPhysLast || cb != pRam->cb || ( cchDesc && strcmp(szDesc, pRam->pszDesc)) ) /* Hack for PDMDevHlpPhysReserve(pDevIns, 0xfff80000, 0x80000, "High ROM Region"); */ && ( uVersion != PGM_SAVED_STATE_VERSION_OLD_PHYS_CODE || GCPhys != UINT32_C(0xfff80000) || GCPhysLast != UINT32_C(0xffffffff) || pRam->GCPhysLast != GCPhysLast || pRam->GCPhys < GCPhys || !fHaveBits) ) { LogRel(("Ram range: %RGp-%RGp %RGp bytes %s %s\n" "State : %RGp-%RGp %RGp bytes %s %s\n", pRam->GCPhys, pRam->GCPhysLast, pRam->cb, pRam->pvR3 ? "bits" : "nobits", pRam->pszDesc, GCPhys, GCPhysLast, cb, fHaveBits ? "bits" : "nobits", szDesc)); /* * If we're loading a state for debugging purpose, don't make a fuss if * the MMIO and ROM stuff isn't 100% right, just skip the mismatches. */ if ( SSMR3HandleGetAfter(pSSM) != SSMAFTER_DEBUG_IT || GCPhys < 8 * _1M) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("RAM range mismatch; saved={%RGp-%RGp %RGp bytes %s %s} config={%RGp-%RGp %RGp bytes %s %s}"), GCPhys, GCPhysLast, cb, fHaveBits ? "bits" : "nobits", szDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->cb, pRam->pvR3 ? "bits" : "nobits", pRam->pszDesc); AssertMsgFailed(("debug skipping not implemented, sorry\n")); continue; } uint32_t cPages = (GCPhysLast - GCPhys + 1) >> PAGE_SHIFT; if (uVersion >= PGM_SAVED_STATE_VERSION_RR_DESC) { /* * Load the pages one by one. */ for (uint32_t iPage = 0; iPage < cPages; iPage++) { RTGCPHYS const GCPhysPage = ((RTGCPHYS)iPage << PAGE_SHIFT) + pRam->GCPhys; PPGMPAGE pPage = &pRam->aPages[iPage]; uint8_t uType; rc = SSMR3GetU8(pSSM, &uType); AssertLogRelMsgRCReturn(rc, ("pPage=%R[pgmpage] iPage=%#x GCPhysPage=%#x %s\n", pPage, iPage, GCPhysPage, pRam->pszDesc), rc); if (uType == PGMPAGETYPE_ROM_SHADOW) rc = pgmR3LoadShadowedRomPageOld(pVM, pSSM, pPage, GCPhysPage, pRam); else rc = pgmR3LoadPageOld(pVM, pSSM, uType, pPage, GCPhysPage, pRam); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc iPage=%#x GCPhysPage=%#x %s\n", rc, iPage, GCPhysPage, pRam->pszDesc), rc); } } else { /* * Old format. */ /* Of the page flags, pick up MMIO2 and ROM/RESERVED for the !fHaveBits case. The rest is generally irrelevant and wrong since the stuff have to match registrations. */ uint32_t fFlags = 0; for (uint32_t iPage = 0; iPage < cPages; iPage++) { uint16_t u16Flags; rc = SSMR3GetU16(pSSM, &u16Flags); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc iPage=%#x GCPhys=%#x %s\n", rc, iPage, pRam->GCPhys, pRam->pszDesc), rc); fFlags |= u16Flags; } /* Load the bits */ if ( !fHaveBits && GCPhysLast < UINT32_C(0xe0000000)) { /* * Dynamic chunks. */ const uint32_t cPagesInChunk = (1*1024*1024) >> PAGE_SHIFT; AssertLogRelMsgReturn(cPages % cPagesInChunk == 0, ("cPages=%#x cPagesInChunk=%#x\n", cPages, cPagesInChunk, pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); for (uint32_t iPage = 0; iPage < cPages; /* incremented by inner loop */ ) { uint8_t fPresent; rc = SSMR3GetU8(pSSM, &fPresent); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc iPage=%#x GCPhys=%#x %s\n", rc, iPage, pRam->GCPhys, pRam->pszDesc), rc); AssertLogRelMsgReturn(fPresent == (uint8_t)true || fPresent == (uint8_t)false, ("fPresent=%#x iPage=%#x GCPhys=%#x %s\n", fPresent, iPage, pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); for (uint32_t iChunkPage = 0; iChunkPage < cPagesInChunk; iChunkPage++, iPage++) { RTGCPHYS const GCPhysPage = ((RTGCPHYS)iPage << PAGE_SHIFT) + pRam->GCPhys; PPGMPAGE pPage = &pRam->aPages[iPage]; if (fPresent) { if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO) rc = pgmR3LoadPageToDevNullOld(pSSM); else rc = pgmR3LoadPageBitsOld(pVM, pSSM, PGMPAGETYPE_INVALID, pPage, GCPhysPage, pRam); } else rc = pgmR3LoadPageZeroOld(pVM, PGMPAGETYPE_INVALID, pPage, GCPhysPage, pRam); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc iPage=%#x GCPhysPage=%#x %s\n", rc, iPage, GCPhysPage, pRam->pszDesc), rc); } } } else if (pRam->pvR3) { /* * MMIO2. */ AssertLogRelMsgReturn((fFlags & 0x0f) == RT_BIT(3) /*MM_RAM_FLAGS_MMIO2*/, ("fFlags=%#x GCPhys=%#x %s\n", fFlags, pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelMsgReturn(pRam->pvR3, ("GCPhys=%#x %s\n", pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); rc = SSMR3GetMem(pSSM, pRam->pvR3, pRam->cb); AssertLogRelMsgRCReturn(rc, ("GCPhys=%#x %s\n", pRam->GCPhys, pRam->pszDesc), rc); } else if (GCPhysLast < UINT32_C(0xfff80000)) { /* * PCI MMIO, no pages saved. */ } else { /* * Load the 0xfff80000..0xffffffff BIOS range. * It starts with X reserved pages that we have to skip over since * the RAMRANGE create by the new code won't include those. */ AssertLogRelMsgReturn( !(fFlags & RT_BIT(3) /*MM_RAM_FLAGS_MMIO2*/) && (fFlags & RT_BIT(0) /*MM_RAM_FLAGS_RESERVED*/), ("fFlags=%#x GCPhys=%#x %s\n", fFlags, pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelMsgReturn(GCPhys == UINT32_C(0xfff80000), ("GCPhys=%RGp pRamRange{GCPhys=%#x %s}\n", GCPhys, pRam->GCPhys, pRam->pszDesc), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); /* Skip wasted reserved pages before the ROM. */ while (GCPhys < pRam->GCPhys) { rc = pgmR3LoadPageToDevNullOld(pSSM); GCPhys += PAGE_SIZE; } /* Load the bios pages. */ cPages = pRam->cb >> PAGE_SHIFT; for (uint32_t iPage = 0; iPage < cPages; iPage++) { RTGCPHYS const GCPhysPage = ((RTGCPHYS)iPage << PAGE_SHIFT) + pRam->GCPhys; PPGMPAGE pPage = &pRam->aPages[iPage]; AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_ROM, ("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, GCPhys), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); rc = pgmR3LoadPageBitsOld(pVM, pSSM, PGMPAGETYPE_ROM, pPage, GCPhysPage, pRam); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc iPage=%#x GCPhys=%#x %s\n", rc, iPage, pRam->GCPhys, pRam->pszDesc), rc); } } } } return VINF_SUCCESS; } /** * Worker for pgmR3Load and pgmR3LoadLocked. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The SSM handle. * @param uVersion The saved state version. * * @todo This needs splitting up if more record types or code twists are * added... */ static int pgmR3LoadMemory(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { /* * Process page records until we hit the terminator. */ RTGCPHYS GCPhys = NIL_RTGCPHYS; PPGMRAMRANGE pRamHint = NULL; uint8_t id = UINT8_MAX; uint32_t iPage = UINT32_MAX - 10; PPGMROMRANGE pRom = NULL; PPGMMMIO2RANGE pMmio2 = NULL; /* * We batch up pages that should be freed instead of calling GMM for * each and every one of them. */ uint32_t cPendingPages = 0; PGMMFREEPAGESREQ pReq; int rc = GMMR3FreePagesPrepare(pVM, &pReq, 128 /* batch size */, GMMACCOUNT_BASE); AssertLogRelRCReturn(rc, rc); for (;;) { /* * Get the record type and flags. */ uint8_t u8; rc = SSMR3GetU8(pSSM, &u8); if (RT_FAILURE(rc)) return rc; if (u8 == PGM_STATE_REC_END) { /* * Finish off any pages pending freeing. */ if (cPendingPages) { rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages); AssertLogRelRCReturn(rc, rc); } GMMR3FreePagesCleanup(pReq); return VINF_SUCCESS; } AssertLogRelMsgReturn((u8 & ~PGM_STATE_REC_FLAG_ADDR) <= PGM_STATE_REC_LAST, ("%#x\n", u8), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); switch (u8 & ~PGM_STATE_REC_FLAG_ADDR) { /* * RAM page. */ case PGM_STATE_REC_RAM_ZERO: case PGM_STATE_REC_RAM_RAW: { /* * Get the address and resolve it into a page descriptor. */ if (!(u8 & PGM_STATE_REC_FLAG_ADDR)) GCPhys += PAGE_SIZE; else { rc = SSMR3GetGCPhys(pSSM, &GCPhys); if (RT_FAILURE(rc)) return rc; } AssertLogRelMsgReturn(!(GCPhys & PAGE_OFFSET_MASK), ("%RGp\n", GCPhys), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); PPGMPAGE pPage; rc = pgmPhysGetPageWithHintEx(&pVM->pgm.s, GCPhys, &pPage, &pRamHint); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc %RGp\n", rc, GCPhys), rc); /* * Take action according to the record type. */ switch (u8 & ~PGM_STATE_REC_FLAG_ADDR) { case PGM_STATE_REC_RAM_ZERO: { if ( PGM_PAGE_IS_ZERO(pPage) || PGM_PAGE_IS_BALLOONED(pPage)) break; AssertLogRelMsgReturn(PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED, ("GCPhys=%RGp %R[pgmpage]\n", GCPhys, pPage), VERR_INTERNAL_ERROR_5); /* Allocated before (prealloc), so free it now. */ rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, GCPhys); AssertRC(rc); break; } case PGM_STATE_REC_RAM_RAW: { void *pvDstPage; rc = pgmPhysGCPhys2CCPtrInternal(pVM, pPage, GCPhys, &pvDstPage); AssertLogRelMsgRCReturn(rc, ("GCPhys=%RGp %R[pgmpage] rc=%Rrc\n", GCPhys, pPage, rc), rc); rc = SSMR3GetMem(pSSM, pvDstPage, PAGE_SIZE); if (RT_FAILURE(rc)) return rc; break; } default: AssertMsgFailedReturn(("%#x\n", u8), VERR_INTERNAL_ERROR); } id = UINT8_MAX; break; } /* * MMIO2 page. */ case PGM_STATE_REC_MMIO2_RAW: case PGM_STATE_REC_MMIO2_ZERO: { /* * Get the ID + page number and resolved that into a MMIO2 page. */ if (!(u8 & PGM_STATE_REC_FLAG_ADDR)) iPage++; else { SSMR3GetU8(pSSM, &id); rc = SSMR3GetU32(pSSM, &iPage); if (RT_FAILURE(rc)) return rc; } if ( !pMmio2 || pMmio2->idSavedState != id) { for (pMmio2 = pVM->pgm.s.pMmio2RangesR3; pMmio2; pMmio2 = pMmio2->pNextR3) if (pMmio2->idSavedState == id) break; AssertLogRelMsgReturn(pMmio2, ("id=%#u iPage=%#x\n", id, iPage), VERR_INTERNAL_ERROR); } AssertLogRelMsgReturn(iPage < (pMmio2->RamRange.cb >> PAGE_SHIFT), ("iPage=%#x cb=%RGp %s\n", iPage, pMmio2->RamRange.cb, pMmio2->RamRange.pszDesc), VERR_INTERNAL_ERROR); void *pvDstPage = (uint8_t *)pMmio2->RamRange.pvR3 + ((size_t)iPage << PAGE_SHIFT); /* * Load the page bits. */ if ((u8 & ~PGM_STATE_REC_FLAG_ADDR) == PGM_STATE_REC_MMIO2_ZERO) ASMMemZeroPage(pvDstPage); else { rc = SSMR3GetMem(pSSM, pvDstPage, PAGE_SIZE); if (RT_FAILURE(rc)) return rc; } GCPhys = NIL_RTGCPHYS; break; } /* * ROM pages. */ case PGM_STATE_REC_ROM_VIRGIN: case PGM_STATE_REC_ROM_SHW_RAW: case PGM_STATE_REC_ROM_SHW_ZERO: case PGM_STATE_REC_ROM_PROT: { /* * Get the ID + page number and resolved that into a ROM page descriptor. */ if (!(u8 & PGM_STATE_REC_FLAG_ADDR)) iPage++; else { SSMR3GetU8(pSSM, &id); rc = SSMR3GetU32(pSSM, &iPage); if (RT_FAILURE(rc)) return rc; } if ( !pRom || pRom->idSavedState != id) { for (pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) if (pRom->idSavedState == id) break; AssertLogRelMsgReturn(pRom, ("id=%#u iPage=%#x\n", id, iPage), VERR_INTERNAL_ERROR); } AssertLogRelMsgReturn(iPage < (pRom->cb >> PAGE_SHIFT), ("iPage=%#x cb=%RGp %s\n", iPage, pRom->cb, pRom->pszDesc), VERR_INTERNAL_ERROR); PPGMROMPAGE pRomPage = &pRom->aPages[iPage]; GCPhys = pRom->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT); /* * Get and set the protection. */ uint8_t u8Prot; rc = SSMR3GetU8(pSSM, &u8Prot); if (RT_FAILURE(rc)) return rc; PGMROMPROT enmProt = (PGMROMPROT)u8Prot; AssertLogRelMsgReturn(enmProt > PGMROMPROT_INVALID && enmProt < PGMROMPROT_END, ("GCPhys=%RGp enmProt=%d\n", GCPhys, enmProt), VERR_INTERNAL_ERROR); if (enmProt != pRomPage->enmProt) { if (RT_UNLIKELY(!(pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED))) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Protection change of unshadowed ROM page: GCPhys=%RGp enmProt=%d %s"), GCPhys, enmProt, pRom->pszDesc); rc = PGMR3PhysRomProtect(pVM, GCPhys, PAGE_SIZE, enmProt); AssertLogRelMsgRCReturn(rc, ("GCPhys=%RGp rc=%Rrc\n", GCPhys, rc), rc); AssertLogRelReturn(pRomPage->enmProt == enmProt, VERR_INTERNAL_ERROR); } if ((u8 & ~PGM_STATE_REC_FLAG_ADDR) == PGM_STATE_REC_ROM_PROT) break; /* done */ /* * Get the right page descriptor. */ PPGMPAGE pRealPage; switch (u8 & ~PGM_STATE_REC_FLAG_ADDR) { case PGM_STATE_REC_ROM_VIRGIN: if (!PGMROMPROT_IS_ROM(enmProt)) pRealPage = &pRomPage->Virgin; else pRealPage = NULL; break; case PGM_STATE_REC_ROM_SHW_RAW: case PGM_STATE_REC_ROM_SHW_ZERO: if (RT_UNLIKELY(!(pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED))) return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Shadowed / non-shadowed page type mismatch: GCPhys=%RGp enmProt=%d %s"), GCPhys, enmProt, pRom->pszDesc); if (PGMROMPROT_IS_ROM(enmProt)) pRealPage = &pRomPage->Shadow; else pRealPage = NULL; break; default: AssertLogRelFailedReturn(VERR_INTERNAL_ERROR); /* shut up gcc */ } if (!pRealPage) { rc = pgmPhysGetPageWithHintEx(&pVM->pgm.s, GCPhys, &pRealPage, &pRamHint); AssertLogRelMsgRCReturn(rc, ("rc=%Rrc %RGp\n", rc, GCPhys), rc); } /* * Make it writable and map it (if necessary). */ void *pvDstPage = NULL; switch (u8 & ~PGM_STATE_REC_FLAG_ADDR) { case PGM_STATE_REC_ROM_SHW_ZERO: if ( PGM_PAGE_IS_ZERO(pRealPage) || PGM_PAGE_IS_BALLOONED(pRealPage)) break; /** @todo implement zero page replacing. */ /* fall thru */ case PGM_STATE_REC_ROM_VIRGIN: case PGM_STATE_REC_ROM_SHW_RAW: { rc = pgmPhysPageMakeWritableAndMap(pVM, pRealPage, GCPhys, &pvDstPage); AssertLogRelMsgRCReturn(rc, ("GCPhys=%RGp rc=%Rrc\n", GCPhys, rc), rc); break; } } /* * Load the bits. */ switch (u8 & ~PGM_STATE_REC_FLAG_ADDR) { case PGM_STATE_REC_ROM_SHW_ZERO: if (pvDstPage) ASMMemZeroPage(pvDstPage); break; case PGM_STATE_REC_ROM_VIRGIN: case PGM_STATE_REC_ROM_SHW_RAW: rc = SSMR3GetMem(pSSM, pvDstPage, PAGE_SIZE); if (RT_FAILURE(rc)) return rc; break; } GCPhys = NIL_RTGCPHYS; break; } /* * Unknown type. */ default: AssertLogRelMsgFailedReturn(("%#x\n", u8), VERR_INTERNAL_ERROR); } } /* forever */ } /** * Worker for pgmR3Load. * * @returns VBox status code. * * @param pVM The VM handle. * @param pSSM The SSM handle. * @param uVersion The saved state version. */ static int pgmR3LoadFinalLocked(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion) { PPGM pPGM = &pVM->pgm.s; int rc; uint32_t u32Sep; /* * Load basic data (required / unaffected by relocation). */ if (uVersion >= PGM_SAVED_STATE_VERSION_3_0_0) { if (uVersion > PGM_SAVED_STATE_VERSION_PRE_BALLOON) rc = SSMR3GetStruct(pSSM, pPGM, &s_aPGMFields[0]); else rc = SSMR3GetStruct(pSSM, pPGM, &s_aPGMFieldsPreBalloon[0]); AssertLogRelRCReturn(rc, rc); for (VMCPUID i = 0; i < pVM->cCpus; i++) { rc = SSMR3GetStruct(pSSM, &pVM->aCpus[i].pgm.s, &s_aPGMCpuFields[0]); AssertLogRelRCReturn(rc, rc); } } else if (uVersion >= PGM_SAVED_STATE_VERSION_RR_DESC) { AssertRelease(pVM->cCpus == 1); PGMOLD pgmOld; rc = SSMR3GetStruct(pSSM, &pgmOld, &s_aPGMFields_Old[0]); AssertLogRelRCReturn(rc, rc); pPGM->fMappingsFixed = pgmOld.fMappingsFixed; pPGM->GCPtrMappingFixed = pgmOld.GCPtrMappingFixed; pPGM->cbMappingFixed = pgmOld.cbMappingFixed; pVM->aCpus[0].pgm.s.fA20Enabled = pgmOld.fA20Enabled; pVM->aCpus[0].pgm.s.GCPhysA20Mask = pgmOld.GCPhysA20Mask; pVM->aCpus[0].pgm.s.enmGuestMode = pgmOld.enmGuestMode; } else { AssertRelease(pVM->cCpus == 1); SSMR3GetBool(pSSM, &pPGM->fMappingsFixed); SSMR3GetGCPtr(pSSM, &pPGM->GCPtrMappingFixed); SSMR3GetU32(pSSM, &pPGM->cbMappingFixed); uint32_t cbRamSizeIgnored; rc = SSMR3GetU32(pSSM, &cbRamSizeIgnored); if (RT_FAILURE(rc)) return rc; SSMR3GetGCPhys(pSSM, &pVM->aCpus[0].pgm.s.GCPhysA20Mask); uint32_t u32 = 0; SSMR3GetUInt(pSSM, &u32); pVM->aCpus[0].pgm.s.fA20Enabled = !!u32; SSMR3GetUInt(pSSM, &pVM->aCpus[0].pgm.s.fSyncFlags); RTUINT uGuestMode; SSMR3GetUInt(pSSM, &uGuestMode); pVM->aCpus[0].pgm.s.enmGuestMode = (PGMMODE)uGuestMode; /* check separator. */ SSMR3GetU32(pSSM, &u32Sep); if (RT_FAILURE(rc)) return rc; if (u32Sep != (uint32_t)~0) { AssertMsgFailed(("u32Sep=%#x (first)\n", u32Sep)); return VERR_SSM_DATA_UNIT_FORMAT_CHANGED; } } /* * The guest mappings - skipped now, see re-fixation in the caller. */ uint32_t i = 0; for (;; i++) { rc = SSMR3GetU32(pSSM, &u32Sep); /* seqence number */ if (RT_FAILURE(rc)) return rc; if (u32Sep == ~0U) break; AssertMsgReturn(u32Sep == i, ("u32Sep=%#x i=%#x\n", u32Sep, i), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); char szDesc[256]; rc = SSMR3GetStrZ(pSSM, szDesc, sizeof(szDesc)); if (RT_FAILURE(rc)) return rc; RTGCPTR GCPtrIgnore; SSMR3GetGCPtr(pSSM, &GCPtrIgnore); /* GCPtr */ rc = SSMR3GetGCPtr(pSSM, &GCPtrIgnore); /* cPTs */ if (RT_FAILURE(rc)) return rc; } /* * Load the RAM contents. */ if (uVersion > PGM_SAVED_STATE_VERSION_3_0_0) { if (!pVM->pgm.s.LiveSave.fActive) { if (uVersion > PGM_SAVED_STATE_VERSION_NO_RAM_CFG) { rc = pgmR3LoadRamConfig(pVM, pSSM); if (RT_FAILURE(rc)) return rc; } rc = pgmR3LoadRomRanges(pVM, pSSM); if (RT_FAILURE(rc)) return rc; rc = pgmR3LoadMmio2Ranges(pVM, pSSM); if (RT_FAILURE(rc)) return rc; } rc = pgmR3LoadMemory(pVM, pSSM, SSM_PASS_FINAL); } else rc = pgmR3LoadMemoryOld(pVM, pSSM, uVersion); /* Refresh balloon accounting. */ if (pVM->pgm.s.cBalloonedPages) { rc = GMMR3BalloonedPages(pVM, GMMBALLOONACTION_INFLATE, pVM->pgm.s.cBalloonedPages); AssertRC(rc); } return rc; } /** * Execute state load operation. * * @returns VBox status code. * @param pVM VM Handle. * @param pSSM SSM operation handle. * @param uVersion Data layout version. * @param uPass The data pass. */ static DECLCALLBACK(int) pgmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass) { int rc; PPGM pPGM = &pVM->pgm.s; /* * Validate version. */ if ( ( uPass != SSM_PASS_FINAL && uVersion != PGM_SAVED_STATE_VERSION && uVersion != PGM_SAVED_STATE_VERSION_PRE_BALLOON && uVersion != PGM_SAVED_STATE_VERSION_NO_RAM_CFG) || ( uVersion != PGM_SAVED_STATE_VERSION && uVersion != PGM_SAVED_STATE_VERSION_PRE_BALLOON && uVersion != PGM_SAVED_STATE_VERSION_NO_RAM_CFG && uVersion != PGM_SAVED_STATE_VERSION_3_0_0 && uVersion != PGM_SAVED_STATE_VERSION_2_2_2 && uVersion != PGM_SAVED_STATE_VERSION_RR_DESC && uVersion != PGM_SAVED_STATE_VERSION_OLD_PHYS_CODE) ) { AssertMsgFailed(("pgmR3Load: Invalid version uVersion=%d (current %d)!\n", uVersion, PGM_SAVED_STATE_VERSION)); return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION; } /* * Do the loading while owning the lock because a bunch of the functions * we're using requires this. */ if (uPass != SSM_PASS_FINAL) { pgmLock(pVM); if (uPass != 0) rc = pgmR3LoadMemory(pVM, pSSM, uPass); else { pVM->pgm.s.LiveSave.fActive = true; if (uVersion > PGM_SAVED_STATE_VERSION_NO_RAM_CFG) rc = pgmR3LoadRamConfig(pVM, pSSM); else rc = VINF_SUCCESS; if (RT_SUCCESS(rc)) rc = pgmR3LoadRomRanges(pVM, pSSM); if (RT_SUCCESS(rc)) rc = pgmR3LoadMmio2Ranges(pVM, pSSM); if (RT_SUCCESS(rc)) rc = pgmR3LoadMemory(pVM, pSSM, uPass); } pgmUnlock(pVM); } else { pgmLock(pVM); rc = pgmR3LoadFinalLocked(pVM, pSSM, uVersion); pVM->pgm.s.LiveSave.fActive = false; pgmUnlock(pVM); if (RT_SUCCESS(rc)) { /* * We require a full resync now. */ for (VMCPUID i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL); VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3); pVCpu->pgm.s.fSyncFlags |= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL; } pgmR3HandlerPhysicalUpdateAll(pVM); /* * Change the paging mode and restore PGMCPU::GCPhysCR3. * (The latter requires the CPUM state to be restored already.) */ if (CPUMR3IsStateRestorePending(pVM)) return SSMR3SetLoadError(pSSM, VERR_WRONG_ORDER, RT_SRC_POS, N_("PGM was unexpectedly restored before CPUM")); for (VMCPUID i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; rc = PGMR3ChangeMode(pVM, pVCpu, pVCpu->pgm.s.enmGuestMode); AssertLogRelRCReturn(rc, rc); /* Update pVM->pgm.s.GCPhysCR3. */ Assert(pVCpu->pgm.s.GCPhysCR3 == NIL_RTGCPHYS || FTMIsDeltaLoadSaveActive(pVM)); RTGCPHYS GCPhysCR3 = CPUMGetGuestCR3(pVCpu); if ( pVCpu->pgm.s.enmGuestMode == PGMMODE_PAE || pVCpu->pgm.s.enmGuestMode == PGMMODE_PAE_NX || pVCpu->pgm.s.enmGuestMode == PGMMODE_AMD64 || pVCpu->pgm.s.enmGuestMode == PGMMODE_AMD64_NX) GCPhysCR3 = (GCPhysCR3 & X86_CR3_PAE_PAGE_MASK); else GCPhysCR3 = (GCPhysCR3 & X86_CR3_PAGE_MASK); pVCpu->pgm.s.GCPhysCR3 = GCPhysCR3; /* Update the PSE, NX flags and validity masks. */ pVCpu->pgm.s.fGst32BitPageSizeExtension = CPUMIsGuestPageSizeExtEnabled(pVCpu); PGMNotifyNxeChanged(pVCpu, CPUMIsGuestNXEnabled(pVCpu)); } /* * Try re-fixate the guest mappings. */ pVM->pgm.s.fMappingsFixedRestored = false; if ( pVM->pgm.s.fMappingsFixed && pgmMapAreMappingsEnabled(&pVM->pgm.s)) { RTGCPTR GCPtrFixed = pVM->pgm.s.GCPtrMappingFixed; uint32_t cbFixed = pVM->pgm.s.cbMappingFixed; pVM->pgm.s.fMappingsFixed = false; uint32_t cbRequired; int rc2 = PGMR3MappingsSize(pVM, &cbRequired); AssertRC(rc2); if ( RT_SUCCESS(rc2) && cbRequired > cbFixed) rc2 = VERR_OUT_OF_RANGE; if (RT_SUCCESS(rc2)) rc2 = pgmR3MappingsFixInternal(pVM, GCPtrFixed, cbFixed); if (RT_FAILURE(rc2)) { LogRel(("PGM: Unable to re-fixate the guest mappings at %RGv-%RGv: rc=%Rrc (cbRequired=%#x)\n", GCPtrFixed, GCPtrFixed + cbFixed, rc2, cbRequired)); pVM->pgm.s.fMappingsFixed = false; pVM->pgm.s.fMappingsFixedRestored = true; pVM->pgm.s.GCPtrMappingFixed = GCPtrFixed; pVM->pgm.s.cbMappingFixed = cbFixed; } } else { /* We used to set fixed + disabled while we only use disabled now, so wipe the state to avoid any confusion. */ pVM->pgm.s.fMappingsFixed = false; pVM->pgm.s.GCPtrMappingFixed = NIL_RTGCPTR; pVM->pgm.s.cbMappingFixed = 0; } /* * If we have floating mappings, do a CR3 sync now to make sure the HMA * doesn't conflict with guest code / data and thereby cause trouble * when restoring other components like PATM. */ if (pgmMapAreMappingsFloating(&pVM->pgm.s)) { PVMCPU pVCpu = &pVM->aCpus[0]; rc = PGMSyncCR3(pVCpu, CPUMGetGuestCR0(pVCpu), CPUMGetGuestCR3(pVCpu), CPUMGetGuestCR4(pVCpu), true); if (RT_FAILURE(rc)) return SSMR3SetLoadError(pSSM, VERR_WRONG_ORDER, RT_SRC_POS, N_("PGMSyncCR3 failed unexpectedly with rc=%Rrc"), rc); /* Make sure to re-sync before executing code. */ VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL); VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3); pVCpu->pgm.s.fSyncFlags |= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL; } } } return rc; } /** * Registers the saved state callbacks with SSM. * * @returns VBox status code. * @param pVM Pointer to VM structure. * @param cbRam The RAM size. */ int pgmR3InitSavedState(PVM pVM, uint64_t cbRam) { return SSMR3RegisterInternal(pVM, "pgm", 1, PGM_SAVED_STATE_VERSION, (size_t)cbRam + sizeof(PGM), pgmR3LivePrep, pgmR3LiveExec, pgmR3LiveVote, NULL, pgmR3SaveExec, pgmR3SaveDone, pgmR3LoadPrep, pgmR3Load, NULL); }