PGMAllPool.cpp revision d816d1a76c08a84682e0388792f47eb43425b8f7
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * PGM Shadow Page Pool.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Copyright (C) 2006-2007 Sun Microsystems, Inc.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * available from http://www.virtualbox.org. This file is free software;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * you can redistribute it and/or modify it under the terms of the GNU
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * General Public License (GPL) as published by the Free Software
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * additional information or have any questions.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync/*******************************************************************************
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync* Header Files *
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync*******************************************************************************/
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync/*******************************************************************************
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync* Internal Functions *
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync*******************************************************************************/
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLINLINE(unsigned) pgmPoolTrackGetShadowEntrySize(PGMPOOLKIND enmKind);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLINLINE(unsigned) pgmPoolTrackGetGuestEntrySize(PGMPOOLKIND enmKind);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic void pgmPoolTrackDeref(PPGMPOOL pPool, PPGMPOOLPAGE pPage);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic void pgmPoolTracDerefGCPhysHint(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTHCPHYS HCPhys, RTGCPHYS GCPhysHint);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic int pgmPoolTrackAddUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic void pgmPoolMonitorModifiedRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLEXPORT(int) pgmPoolAccessHandler(PVM pVM, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, RTGCPHYS GCPhysFault, void *pvUser);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic const char *pgmPoolPoolKindToStr(uint8_t enmKind);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncvoid pgmPoolTrackFlushGCPhysPT(PVM pVM, PPGMPAGE pPhysPage, uint16_t iShw, uint16_t cRefs);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncvoid pgmPoolTrackFlushGCPhysPTs(PVM pVM, PPGMPAGE pPhysPage, uint16_t iPhysExt);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncint pgmPoolTrackFlushGCPhysPTsSlow(PVM pVM, PPGMPAGE pPhysPage);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncPPGMPOOLPHYSEXT pgmPoolTrackPhysExtAlloc(PVM pVM, uint16_t *piPhysExt);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncvoid pgmPoolTrackPhysExtFree(PVM pVM, uint16_t iPhysExt);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncvoid pgmPoolTrackPhysExtFreeList(PVM pVM, uint16_t iPhysExt);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Checks if the specified page pool kind is for a 4MB or 2MB guest page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns true if it's the shadow of a 4MB or 2MB guest page, otherwise false.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param enmKind The page kind.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncDECLINLINE(bool) pgmPoolIsBigPage(PGMPOOLKIND enmKind)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync return true;
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync return false;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync/** @def PGMPOOL_PAGE_2_LOCKED_PTR
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Maps a pool page pool into the current context and lock it (RC only).
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @returns VBox status code.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pVM The VM handle.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPage The pool page.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @remark In RC this uses PGMGCDynMapHCPage(), so it will consume of the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * small page window employeed by that function. Be careful.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @remark There is no need to assert on the result.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsyncDECLINLINE(void *) PGMPOOL_PAGE_2_LOCKED_PTR(PVM pVM, PPGMPOOLPAGE pPage)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync void *pv = pgmPoolMapPageInlined(&pVM->pgm.s, pPage);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /* Make sure the dynamic mapping will not be reused. */
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync# define PGMPOOL_PAGE_2_LOCKED_PTR(pVM, pPage) PGMPOOL_PAGE_2_PTR(pVM, pPage)
c142e0f462e6c921a73d84ee50f41396b3a99db5vboxsync/** @def PGMPOOL_UNLOCK_PTR
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Unlock a previously locked dynamic caching (RC only).
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * @returns VBox status code.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pVM The VM handle.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The pool page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @remark In RC this uses PGMGCDynMapHCPage(), so it will consume of the
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * small page window employeed by that function. Be careful.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @remark There is no need to assert on the result.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLINLINE(void) PGMPOOL_UNLOCK_PTR(PVM pVM, void *pvPage)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync# define PGMPOOL_UNLOCK_PTR(pVM, pPage) do {} while (0)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Determin the size of a write instruction.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @returns number of bytes written.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pDis The disassembler state.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsyncstatic unsigned pgmPoolDisasWriteSize(PDISCPUSTATE pDis)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * This is very crude and possibly wrong for some opcodes,
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * but since it's not really supposed to be called we can
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * probably live with that.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Flushes a chain of pages sharing the same access monitor.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns VBox status code suitable for scheduling.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPool The pool.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPage A page in the chain.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncint pgmPoolMonitorChainFlush(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainFlush: Flush page %RGp type=%d\n", pPage->GCPhys, pPage->enmKind));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * Find the list head.
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync * Iterate the list flushing each shadow page.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * Wrapper for getting the current context pointer to the entry being modified.
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * @returns VBox status code suitable for scheduling.
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * @param pVM VM Handle.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @param pvDst Destination address
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @param pvSrc Source guest virtual address.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @param GCPhysSrc The source guest physical address.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param cb Size of data to read
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsyncDECLINLINE(int) pgmPoolPhysSimpleReadGCPhys(PVM pVM, void *pvDst, CTXTYPE(RTGCPTR, RTHCPTR, RTGCPTR) pvSrc, RTGCPHYS GCPhysSrc, size_t cb)
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync memcpy(pvDst, (RTHCPTR)((uintptr_t)pvSrc & ~(RTHCUINTPTR)(cb - 1)), cb);
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync /* @todo in RC we could attempt to use the virtual address, although this can cause many faults (PAE Windows XP guest). */
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync return PGMPhysSimpleReadGCPhys(pVM, pvDst, GCPhysSrc & ~(RTGCPHYS)(cb - 1), cb);
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * Process shadow entries before they are changed by the guest.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * For PT entries we will clear them. For PD entries, we'll simply check
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * for mapping conflicts and set the SyncCR3 FF if found.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pVCpu VMCPU handle
06ea6bcf23874b662d499b3f130024c98b2dd7a6vboxsync * @param pPool The pool.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPage The head page.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param GCPhysFault The guest physical fault address.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param uAddress In R0 and GC this is the guest context fault address (flat).
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * In R3 this is the host context 'fault' address.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * @param pCpu The disassembler state for figuring out the write size.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * This need not be specified if the caller knows we won't do cross entry accesses.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncvoid pgmPoolMonitorChainChanging(PVMCPU pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTGCPHYS GCPhysFault, CTXTYPE(RTGCPTR, RTHCPTR, RTGCPTR) pvAddress, PDISCPUSTATE pCpu)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const unsigned off = GCPhysFault & PAGE_OFFSET_MASK;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const unsigned cbWrite = (pCpu) ? pgmPoolDisasWriteSize(pCpu) : 0;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: %RGv phys=%RGp kind=%s cbWrite=%d\n", (RTGCPTR)pvAddress, GCPhysFault, pgmPoolPoolKindToStr(pPage->enmKind), cbWrite));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT iShw=%x\n", iShw));
06ea6bcf23874b662d499b3f130024c98b2dd7a6vboxsync int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Log4(("pgmPoolMonitorChainChanging 32_32: deref %016RX64 GCPhys %08RX32\n", uShw.pPT->a[iShw].u & X86_PTE_PAE_PG_MASK, GstPte.u & X86_PTE_PG_MASK));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* page/2 sized */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const unsigned iShw = (off / sizeof(X86PTE)) & (X86_PG_PAE_ENTRIES - 1);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("PGMPOOLKIND_PAE_PT_FOR_32BIT_PT iShw=%x\n", iShw));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync Log4(("pgmPoolMonitorChainChanging pae_32: deref %016RX64 GCPhys %08RX32\n", uShw.pPT->a[iShw].u & X86_PTE_PAE_PG_MASK, GstPte.u & X86_PTE_PG_MASK));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync LogFlow(("pgmPoolMonitorChainChanging PAE for 32 bits: iGst=%x iShw=%x idx = %d page idx=%d\n", iGst, iShw, iShwPdpt, pPage->enmKind - PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync if (iShwPdpt == pPage->enmKind - (unsigned)PGMPOOLKIND_PAE_PD0_FOR_32BIT_PD)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync for (unsigned i = 0; i < 2; i++)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync if ((uShw.pPDPae->a[iShw + i].u & (PGM_PDFLAGS_MAPPING | X86_PDE_P)) == (PGM_PDFLAGS_MAPPING | X86_PDE_P))
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShwPdpt=%#x iShw=%#x!\n", iShwPdpt, iShw+i));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# endif /* !IN_RING0 */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw+i, uShw.pPDPae->a[iShw+i].u));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* paranoia / a bit assumptive. */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync if ((uShw.pPDPae->a[iShw2].u & (PGM_PDFLAGS_MAPPING | X86_PDE_P)) == (PGM_PDFLAGS_MAPPING | X86_PDE_P))
7e8ef90d3160234df0f254131b87af4243d79476vboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShwPdpt=%#x iShw2=%#x!\n", iShwPdpt, iShw2));
7e8ef90d3160234df0f254131b87af4243d79476vboxsync# endif /* !IN_RING0 */
7e8ef90d3160234df0f254131b87af4243d79476vboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPae->a[iShw2].u));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress, GCPhysFault, sizeof(GstPte));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync Log4(("pgmPoolMonitorChainChanging pae: deref %016RX64 GCPhys %016RX64\n", uShw.pPTPae->a[iShw].u & X86_PTE_PAE_PG_MASK, GstPte.u & X86_PTE_PAE_PG_MASK));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync /* paranoia / a bit assumptive. */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PTEPAE);
1cd59fdf671ca60c64d77e3f7046aaecf7003824vboxsync int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, (RTHCPTR)((RTHCUINTPTR)pvAddress + sizeof(GstPte)), GCPhysFault + sizeof(GstPte), sizeof(GstPte));
1cd59fdf671ca60c64d77e3f7046aaecf7003824vboxsync int rc = pgmPoolPhysSimpleReadGCPhys(pVM, &GstPte, pvAddress + sizeof(GstPte), GCPhysFault + sizeof(GstPte), sizeof(GstPte));
1cd59fdf671ca60c64d77e3f7046aaecf7003824vboxsync Log4(("pgmPoolMonitorChainChanging pae: deref %016RX64 GCPhys %016RX64\n", uShw.pPTPae->a[iShw2].u & X86_PTE_PAE_PG_MASK, GstPte.u & X86_PTE_PAE_PG_MASK));
1cd59fdf671ca60c64d77e3f7046aaecf7003824vboxsync const unsigned iShw = off / sizeof(X86PTE); // ASSUMING 32-bit guest paging!
1cd59fdf671ca60c64d77e3f7046aaecf7003824vboxsync LogFlow(("pgmPoolMonitorChainChanging: PGMPOOLKIND_32BIT_PD %x\n", iShw));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShw=%#x!\n", iShw));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# endif /* !IN_RING0 */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# endif /* !IN_RING0 */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: 32 bit pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPD->a[iShw].u));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* paranoia / a bit assumptive. */
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PTE);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShw2=%#x!\n", iShw2));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# endif /* !IN_RING0 */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# endif /* !IN_RING0 */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: 32 bit pd iShw=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPD->a[iShw2].u));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync#if 0 /* useful when running PGMAssertCR3(), a bit too troublesome for general use (TLBs). */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolMonitorChainChanging: iShw=%#x: %RX32 -> freeing it!\n", iShw, uShw.pPD->a[iShw].u));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync# ifdef IN_RC /* TLB load - we're pushing things a bit... */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pgmPoolFree(pVM, uShw.pPD->a[iShw].u & X86_PDE_PG_MASK, pPage->idx, iShw);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShw=%#x!\n", iShw));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync#endif /* !IN_RING0 */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Causes trouble when the guest uses a PDE to refer to the whole page table level
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * structure. (Invalidate here; faults later on when it tries to change the page
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * table entries -> recheck; probably only applies to the RC case.)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync# endif /* !IN_RING0 */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPDPae->a[iShw].u));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync /* paranoia / a bit assumptive. */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDEPAE);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShw2=%#x!\n", iShw2));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync#endif /* !IN_RING0 */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync# endif /* !IN_RING0 */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPae->a[iShw2].u));
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * Hopefully this doesn't happen very often:
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * - touching unused parts of the page
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * - messing with the bits of pd pointers without changing the physical address
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync /* PDPT roots are not page aligned; 32 byte only! */
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync const unsigned offPdpt = GCPhysFault - pPage->GCPhys;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync if (iShw < X86_PG_PAE_PDPE_ENTRIES) /* don't use RT_ELEMENTS(uShw.pPDPT->a), because that's for long mode only */
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected pdpt conflict at iShw=%#x!\n", iShw));
5366e994777f9d9391cf809dc77610f57270d75dvboxsync# endif /* !IN_RING0 */
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync# endif /* !IN_RING0 */
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPDPT->a[iShw].u));
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync /* paranoia / a bit assumptive. */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync const unsigned iShw2 = (offPdpt + cbWrite - 1) / sizeof(X86PDPE);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync STAM_COUNTER_INC(&(pVCpu->pgm.s.StatRZGuestCR3WriteConflict));
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync LogFlow(("pgmPoolMonitorChainChanging: Detected conflict at iShw2=%#x!\n", iShw2));
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync# endif /* !IN_RING0 */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync# endif /* !IN_RING0 */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPT->a[iShw2].u));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync Assert(!(uShw.pPDPae->a[iShw].u & PGM_PDFLAGS_MAPPING));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPDPae->a[iShw].u));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync /* paranoia / a bit assumptive. */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDEPAE);
ca3db470494a8b6eaec69ea37468a5cda65e2da8vboxsync Assert(!(uShw.pPDPae->a[iShw2].u & PGM_PDFLAGS_MAPPING));
ca3db470494a8b6eaec69ea37468a5cda65e2da8vboxsync LogFlow(("pgmPoolMonitorChainChanging: pae pd iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPae->a[iShw2].u));
ca3db470494a8b6eaec69ea37468a5cda65e2da8vboxsync * Hopefully this doesn't happen very often:
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * - messing with the bits of pd pointers without changing the physical address
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync LogFlow(("pgmPoolMonitorChainChanging: pdpt iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPDPT->a[iShw].u));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pgmPoolFree(pVM, uShw.pPDPT->a[iShw].u & X86_PDPE_PG_MASK, pPage->idx, iShw);
ca3db470494a8b6eaec69ea37468a5cda65e2da8vboxsync /* paranoia / a bit assumptive. */
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PDPE);
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync LogFlow(("pgmPoolMonitorChainChanging: pdpt iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPDPT->a[iShw2].u));
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync pgmPoolFree(pVM, uShw.pPDPT->a[iShw2].u & X86_PDPE_PG_MASK, pPage->idx, iShw2);
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync * Hopefully this doesn't happen very often:
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync * - messing with the bits of pd pointers without changing the physical address
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync LogFlow(("pgmPoolMonitorChainChanging: pml4 iShw=%#x: %RX64 -> freeing it!\n", iShw, uShw.pPML4->a[iShw].u));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync pgmPoolFree(pVM, uShw.pPML4->a[iShw].u & X86_PML4E_PG_MASK, pPage->idx, iShw);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /* paranoia / a bit assumptive. */
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync const unsigned iShw2 = (off + cbWrite - 1) / sizeof(X86PML4E);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync LogFlow(("pgmPoolMonitorChainChanging: pml4 iShw2=%#x: %RX64 -> freeing it!\n", iShw2, uShw.pPML4->a[iShw2].u));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync pgmPoolFree(pVM, uShw.pPML4->a[iShw2].u & X86_PML4E_PG_MASK, pPage->idx, iShw2);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync#endif /* IN_RING0 */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync AssertFatalMsgFailed(("enmKind=%d\n", pPage->enmKind));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Checks if a access could be a fork operation in progress.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Meaning, that the guest is setuping up the parent process for Copy-On-Write.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @returns true if it's likly that we're forking, otherwise false.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pPool The pool.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pCpu The disassembled instruction.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param offFault The access offset.
cc1ef2ef9bbc6a0ff964928d61b7298e5bfcce5fvboxsyncDECLINLINE(bool) pgmPoolMonitorIsForking(PPGMPOOL pPool, PDISCPUSTATE pCpu, unsigned offFault)
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync * i386 linux is using btr to clear X86_PTE_RW.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * The functions involved are (2.6.16 source inspection):
cc1ef2ef9bbc6a0ff964928d61b7298e5bfcce5fvboxsync * clear_bit
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * ptep_set_wrprotect
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * copy_one_pte
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * copy_pte_range
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * copy_pmd_range
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * copy_pud_range
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * copy_page_range
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * copy_process
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync /** @todo Validate that the bit index is X86_PTE_RW. */
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,Fork));
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync return true;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return false;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Determine whether the page is likely to have been reused.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @returns true if we consider the page as being reused for a different purpose.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns false if we consider it to still be a paging page.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pVM VM Handle.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pRegFrame Trap register frame.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pCpu The disassembly info for the faulting instruction.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pvFault The fault address.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @remark The REP prefix check is left to the caller because of STOSD/W.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLINLINE(bool) pgmPoolMonitorIsReused(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu, RTGCPTR pvFault)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /** @todo could make this general, faulting close to rsp should be safe reuse heuristic. */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /* Fault caused by stack writes while trying to inject an interrupt event. */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync Log(("pgmPoolMonitorIsReused: reused %RGv for interrupt stack (rsp=%RGv).\n", pvFault, pRegFrame->rsp));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return true;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /* call implies the actual push of the return address faulted */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return true;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return true;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return true;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync return true;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return true;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return true;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync case OP_MOVNTDQ: /* solaris - hwblkclr & hwblkpagecopy */
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return true;
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync return true;
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync return false;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return true;
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return false;
004d74842597dacc4009803171296dfcf9398c69vboxsync * Flushes the page being accessed.
004d74842597dacc4009803171296dfcf9398c69vboxsync * @returns VBox status code suitable for scheduling.
004d74842597dacc4009803171296dfcf9398c69vboxsync * @param pVM The VM handle.
004d74842597dacc4009803171296dfcf9398c69vboxsync * @param pVCpu The VMCPU handle.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pPool The pool.
004d74842597dacc4009803171296dfcf9398c69vboxsync * @param pPage The pool page (head).
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pCpu The disassembly of the write instruction.
004d74842597dacc4009803171296dfcf9398c69vboxsync * @param pRegFrame The trap register frame.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param GCPhysFault The fault address as guest physical address.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pvFault The fault address.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsyncstatic int pgmPoolAccessHandlerFlush(PVM pVM, PVMCPU pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pCpu,
004d74842597dacc4009803171296dfcf9398c69vboxsync PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault)
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * First, do the flushing.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Emulate the instruction (xp/w2k problem, requires pc/cr2/sp detection).
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync int rc2 = EMInterpretInstructionCPU(pVM, pVCpu, pCpu, pRegFrame, pvFault, &cbWritten);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync if (PATMIsPatchGCAddr(pVM, (RTRCPTR)pRegFrame->eip))
5366e994777f9d9391cf809dc77610f57270d75dvboxsync LogFlow(("pgmPoolAccessHandlerPTWorker: Interpretation failed for patch code %04x:%RGv, ignoring.\n",
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync STAM_COUNTER_INC(&pPool->StatMonitorRZIntrFailPatch2);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,EmulateInstr));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync /* See use in pgmPoolAccessHandlerSimple(). */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync LogFlow(("pgmPoolAccessHandlerPT: returns %Rrc (flushed)\n", rc));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Handles the STOSD write accesses.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @returns VBox status code suitable for scheduling.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pVM The VM handle.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pPool The pool.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pPage The pool page (head).
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pCpu The disassembly of the write instruction.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pRegFrame The trap register frame.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param GCPhysFault The fault address as guest physical address.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @param pvFault The fault address.
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsyncDECLINLINE(int) pgmPoolAccessHandlerSTOSD(PVM pVM, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pCpu,
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Increment the modification counter and insert it into the list
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * of modified pages the first time.
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync * Execute REP STOSD.
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync * This ASSUMES that we're not invoked by Trap0e on in a out-of-sync
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync * write situation, meaning that it's safe to write here.
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync uint32_t iPrevSubset = PGMDynMapPushAutoSubset(pVCpu);
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, (RTGCPTR)pu32, NULL);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, (RTGCPTR)pu32, NULL);
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync PGMPhysSimpleWriteGCPhys(pVM, GCPhysFault, &pRegFrame->eax, 4);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync /* See use in pgmPoolAccessHandlerSimple(). */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Handles the simple write accesses.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @returns VBox status code suitable for scheduling.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pVM The VM handle.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param pVCpu The VMCPU handle.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param pPool The pool.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pPage The pool page (head).
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param pCpu The disassembly of the write instruction.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param pRegFrame The trap register frame.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param GCPhysFault The fault address as guest physical address.
3ff8aa7d3c74cfbe8da5f77b8ea6c748cc79213avboxsync * @param pvFault The fault address.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsyncDECLINLINE(int) pgmPoolAccessHandlerSimple(PVM pVM, PVMCPU pVCpu, PPGMPOOL pPool, PPGMPOOLPAGE pPage, PDISCPUSTATE pCpu,
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, RTGCPTR pvFault)
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * Increment the modification counter and insert it into the list
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * of modified pages the first time.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * Clear all the pages. ASSUMES that pvFault is readable.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync uint32_t iPrevSubset = PGMDynMapPushAutoSubset(pVCpu);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, pvFault, pCpu);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhysFault, pvFault, pCpu);
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * Interpret the instruction.
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync int rc = EMInterpretInstructionCPU(pVM, pVCpu, pCpu, pRegFrame, pvFault, &cb);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync LogFlow(("pgmPoolAccessHandlerPTWorker: Interpretation failed for %04x:%RGv - opcode=%d\n",
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync pRegFrame->cs, (RTGCPTR)pRegFrame->rip, pCpu->pCurInstr->opcode));
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,EmulateInstr));
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync * Quick hack, with logging enabled we're getting stale
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync * code TLBs but no data TLB for EIP and crash in EMInterpretDisasOne.
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync * Flushing here is BAD and expensive, I think EMInterpretDisasOne will
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync * have to be fixed to support this. But that'll have to wait till next week.
40c1a23e86c79b24a917a43c186b2e54504d12c1vboxsync * An alternative is to keep track of the changed PTEs together with the
40c1a23e86c79b24a917a43c186b2e54504d12c1vboxsync * GCPhys from the guest PT. This may proove expensive though.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * At the moment, it's VITAL that it's done AFTER the instruction interpreting
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * because we need the stale TLBs in some cases (XP boot). This MUST be fixed properly!
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync LogFlow(("pgmPoolAccessHandlerSimple: returns %Rrc cb=%d\n", rc, cb));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * \#PF Handler callback for PT write accesses.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns VBox status code (appropriate for GC return).
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pVM VM Handle.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param uErrorCode CPU Error code.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pRegFrame Trap register frame.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * NULL on DMA and other non CPU access.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pvFault The fault address (cr2).
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param GCPhysFault The GC physical address corresponding to pvFault.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pvUser User argument.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLEXPORT(int) pgmPoolAccessHandler(PVM pVM, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, RTGCPHYS GCPhysFault, void *pvUser)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pPool)->CTX_SUFF_Z(StatMonitor), a);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync LogFlow(("pgmPoolAccessHandler: pvFault=%RGv pPage=%p:{.idx=%d} GCPhysFault=%RGp\n", pvFault, pPage, pPage->idx, GCPhysFault));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * We should ALWAYS have the list head as user parameter. This
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * is because we use that page to record the changes.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Disassemble the faulting instruction.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync int rc = EMInterpretDisasOne(pVM, pVCpu, pRegFrame, &Cpu, NULL);
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync AssertMsg(PHYS_PAGE_ADDRESS(GCPhysFault) == PHYS_PAGE_ADDRESS(pPage->GCPhys), ("%RGp vs %RGp\n", PHYS_PAGE_ADDRESS(GCPhysFault), pPage->GCPhys));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Check if it's worth dealing with.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync bool fReused = false;
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync if ( ( pPage->cModifications < 48 /** @todo #define */ /** @todo need to check that it's not mapping EIP. */ /** @todo adjust this! */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync && !(fReused = pgmPoolMonitorIsReused(pVM, pRegFrame, &Cpu, pvFault))
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync && !pgmPoolMonitorIsForking(pPool, &Cpu, GCPhysFault & PAGE_OFFSET_MASK))
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Simple instructions, no REP prefix.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync rc = pgmPoolAccessHandlerSimple(pVM, pVCpu, pPool, pPage, &Cpu, pRegFrame, GCPhysFault, pvFault);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->CTX_SUFF_Z(StatMonitor), &pPool->CTX_MID_Z(StatMonitor,Handled), a);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Windows is frequently doing small memset() operations (netio test 4k+).
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * We have to deal with these or we'll kill the cache and performance.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync && pRegFrame->ecx * 4 <= PAGE_SIZE - ((uintptr_t)pvFault & PAGE_OFFSET_MASK)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync && (pRegFrame->eax == 0 || pRegFrame->eax == 0x80) /* the two values observed. */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync rc = pgmPoolAccessHandlerSTOSD(pVM, pPool, pPage, &Cpu, pRegFrame, GCPhysFault, pvFault);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->CTX_SUFF_Z(StatMonitor), &pPool->CTX_MID_Z(StatMonitor,RepStosd), a);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync /* REP prefix, don't bother. */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync STAM_COUNTER_INC(&pPool->CTX_MID_Z(StatMonitor,RepPrefix));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync Log4(("pgmPoolAccessHandler: eax=%#x ecx=%#x edi=%#x esi=%#x rip=%RGv opcode=%d prefix=%#x\n",
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync pRegFrame->eax, pRegFrame->ecx, pRegFrame->edi, pRegFrame->esi, (RTGCPTR)pRegFrame->rip, Cpu.pCurInstr->opcode, Cpu.prefix));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Not worth it, so flush it.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * If we considered it to be reused, don't go back to ring-3
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * to emulate failed instructions since we usually cannot
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * interpret then. This may be a bit risky, in which case
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * the reuse detection must be fixed.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync rc = pgmPoolAccessHandlerFlush(pVM, pVCpu, pPool, pPage, &Cpu, pRegFrame, GCPhysFault, pvFault);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync STAM_PROFILE_STOP_EX(&pVM->pgm.s.CTX_SUFF(pPool)->CTX_SUFF_Z(StatMonitor), &pPool->CTX_MID_Z(StatMonitor,FlushPage), a);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync# endif /* !IN_RING3 */
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync#endif /* PGMPOOL_WITH_MONITORING */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Inserts a page into the GCPhys hash table.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncDECLINLINE(void) pgmPoolHashInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync Log3(("pgmPoolHashInsert: %RGp\n", pPage->GCPhys));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync Assert(pPage->GCPhys != NIL_RTGCPHYS); Assert(pPage->iNext == NIL_PGMPOOL_IDX);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Removes a page from the GCPhys hash table.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The page.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsyncDECLINLINE(void) pgmPoolHashRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync Log3(("pgmPoolHashRemove: %RGp\n", pPage->GCPhys));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync AssertReleaseMsgFailed(("GCPhys=%RGp idx=%#x\n", pPage->GCPhys, pPage->idx));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Frees up one cache page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns VBox status code.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * @retval VINF_SUCCESS on success.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param iUser The user index.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsyncstatic int pgmPoolCacheFreeOne(PPGMPOOL pPool, uint16_t iUser)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync Assert(pPool->iAgeHead != pPool->iAgeTail); /* We shouldn't be here if there < 2 cached entries! */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Select one page from the tail of the age list.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync/* This is the alternative to the SyncCR3 pgmPoolCacheUsed calls.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync if (pPool->aPages[iToFree].iUserHead != NIL_PGMPOOL_USER_INDEX)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync uint16_t i = pPool->aPages[iToFree].iAgePrev;
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync for (unsigned j = 0; j < 10 && i != NIL_PGMPOOL_USER_INDEX; j++, i = pPool->aPages[i].iAgePrev)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync if (pPool->aPages[iToFree].iUserHead == NIL_PGMPOOL_USER_INDEX)
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync iToFree = i;
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Reject any attempts at flushing the currently active shadow CR3 mapping.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Call pgmPoolCacheUsed to move the page to the head of the age list.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync if (!pgmPoolIsPageLocked(&pPool->CTX_SUFF(pVM)->pgm.s, pPage))
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync LogFlow(("pgmPoolCacheFreeOne: refuse CR3 mapping\n"));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync AssertLogRelReturn(iLoop < 8192, VERR_INTERNAL_ERROR);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Found a usable page, flush it and return.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Checks if a kind mismatch is really a page being reused
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * or if it's just normal remappings.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns true if reused and the cached page (enmKind1) should be flushed
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns false if not reused.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param enmKind1 The kind of the cached page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param enmKind2 The kind of the requested page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncstatic bool pgmPoolCacheReusedByKind(PGMPOOLKIND enmKind1, PGMPOOLKIND enmKind2)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Never reuse them. There is no remapping in non-paging mode.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync case PGMPOOLKIND_PAE_PDPT_FOR_32BIT: /* never reuse them for other types */
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync return false;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * It's perfectly fine to reuse these, except for PAE and non-paging stuff.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync return true;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync return false;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * It's perfectly fine to reuse these, except for PAE and non-paging stuff.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync return true;
cc1ef2ef9bbc6a0ff964928d61b7298e5bfcce5fvboxsync return false;
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * These cannot be flushed, and it's common to reuse the PDs as PTs.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync return false;
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * Attempts to satisfy a pgmPoolAlloc request from the cache.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @returns VBox status code.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @retval VINF_PGM_CACHED_PAGE on success.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * @retval VERR_FILE_NOT_FOUND if not found.
7e8ef90d3160234df0f254131b87af4243d79476vboxsync * @param pPool The pool.
7e8ef90d3160234df0f254131b87af4243d79476vboxsync * @param GCPhys The GC physical address of the page we're gonna shadow.
7e8ef90d3160234df0f254131b87af4243d79476vboxsync * @param enmKind The kind of mapping.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * @param iUser The shadow page pool index of the user table.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * @param iUserTable The index into the user table (shadowed).
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * @param ppPage Where to store the pointer to the page.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsyncstatic int pgmPoolCacheAlloc(PPGMPOOL pPool, RTGCPHYS GCPhys, PGMPOOLKIND enmKind, uint16_t iUser, uint32_t iUserTable, PPPGMPOOLPAGE ppPage)
e2489bd9ef063ae006feaebc3318ffa4143f6e16vboxsync * Look up the GCPhys in the hash.
e2489bd9ef063ae006feaebc3318ffa4143f6e16vboxsync Log3(("pgmPoolCacheAlloc: %RGp kind %s iUser=%x iUserTable=%x SLOT=%d\n", GCPhys, pgmPoolPoolKindToStr(enmKind), iUser, iUserTable, i));
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync Log4(("pgmPoolCacheAlloc: slot %d found page %RGp\n", i, pPage->GCPhys));
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync /* Put it at the start of the use list to make sure pgmPoolTrackAddUser
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync * doesn't flush it in case there are no more free use records.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync int rc = pgmPoolTrackAddUser(pPool, pPage, iUser, iUserTable);
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync * The kind is different. In some cases we should now flush the page
6b9d50a0f466bd5a61458ed53925480ab28a3c17vboxsync * as it has been reused, but in most cases this is normal remapping
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * of PDs as PT or big pages using the GCPhys field in a slightly
6b9d50a0f466bd5a61458ed53925480ab28a3c17vboxsync * different way than the other kinds.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync if (pgmPoolCacheReusedByKind((PGMPOOLKIND)pPage->enmKind, enmKind))
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync } while (i != NIL_PGMPOOL_IDX);
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync Log3(("pgmPoolCacheAlloc: Missed GCPhys=%RGp enmKind=%s\n", GCPhys, pgmPoolPoolKindToStr(enmKind)));
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync * Inserts a page into the cache.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The cached page.
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * @param fCanBeCached Set if the page is fit for caching from the caller's point of view.
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsyncstatic void pgmPoolCacheInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage, bool fCanBeCached)
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync * Insert into the GCPhys hash if the page is fit for that.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync Log3(("pgmPoolCacheInsert: Caching %p:{.Core=%RHp, .idx=%d, .enmKind=%s, GCPhys=%RGp}\n",
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), pPage->GCPhys));
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync Log3(("pgmPoolCacheInsert: Not caching %p:{.Core=%RHp, .idx=%d, .enmKind=%s, GCPhys=%RGp}\n",
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync pPage, pPage->Core.Key, pPage->idx, pgmPoolPoolKindToStr(pPage->enmKind), pPage->GCPhys));
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync * Insert at the head of the age list.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync pPool->aPages[pPool->iAgeHead].iAgePrev = pPage->idx;
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * Flushes a cached page.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * @param pPool The pool.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * @param pPage The cached page.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsyncstatic void pgmPoolCacheFlushPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync Log3(("pgmPoolCacheFlushPage: %RGp\n", pPage->GCPhys));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Remove the page from the hash.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Remove it from the age list.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync pPool->aPages[pPage->iAgeNext].iAgePrev = pPage->iAgePrev;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync pPool->aPages[pPage->iAgePrev].iAgeNext = pPage->iAgeNext;
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync#endif /* PGMPOOL_WITH_CACHE */
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Looks for pages sharing the monitor.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns Pointer to the head page.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @returns NULL if not found.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pPool The Pool
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * @param pNewPage The page which is going to be monitored.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsyncstatic PPGMPOOLPAGE pgmPoolMonitorGetPageByGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pNewPage)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Look up the GCPhys in the hash.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync RTGCPHYS GCPhys = pNewPage->GCPhys & ~(RTGCPHYS)(PAGE_SIZE - 1);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync /* find the head */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync /* ignore, no monitoring. */
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync AssertFatalMsgFailed(("enmKind=%d idx=%d\n", pPage->enmKind, pPage->idx));
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync } while (i != NIL_PGMPOOL_IDX);
88cc9bf61296bc5526344415167bb2625ae1dd99vboxsync * Enabled write monitoring of a guest page.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @returns VBox status code.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @retval VINF_SUCCESS on success.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @param pPool The pool.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @param pPage The cached page.
f9ce005e61f0fbb51a2cabc53d58c3485151faa9vboxsyncstatic int pgmPoolMonitorInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
f9ce005e61f0fbb51a2cabc53d58c3485151faa9vboxsync LogFlow(("pgmPoolMonitorInsert %RGp\n", pPage->GCPhys & ~(RTGCPHYS)(PAGE_SIZE - 1)));
f9ce005e61f0fbb51a2cabc53d58c3485151faa9vboxsync * Filter out the relevant kinds.
f9ce005e61f0fbb51a2cabc53d58c3485151faa9vboxsync /* Nothing to monitor here. */
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync /* Nothing to monitor here. */
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync AssertFatalMsgFailed(("This can't happen! enmKind=%d\n", pPage->enmKind));
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Install handler.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync PPGMPOOLPAGE pPageHead = pgmPoolMonitorGetPageByGCPhys(pPool, pPage);
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync Assert(pPageHead != pPage); Assert(pPageHead->iMonitoredNext != pPage->idx);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync pPool->aPages[pPageHead->iMonitoredNext].iMonitoredPrev = pPage->idx;
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync Assert(pPage->iMonitoredNext == NIL_PGMPOOL_IDX); Assert(pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync const RTGCPHYS GCPhysPage = pPage->GCPhys & ~(RTGCPHYS)(PAGE_SIZE - 1);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync rc = PGMHandlerPhysicalRegisterEx(pVM, PGMPHYSHANDLERTYPE_PHYSICAL_WRITE,
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync pPool->pfnAccessHandlerR3, MMHyperCCToR3(pVM, pPage),
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync pPool->pfnAccessHandlerR0, MMHyperCCToR0(pVM, pPage),
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync pPool->pfnAccessHandlerRC, MMHyperCCToRC(pVM, pPage),
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync /** @todo we should probably deal with out-of-memory conditions here, but for now increasing
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * the heap size should suffice. */
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync AssertFatalMsgRC(rc, ("PGMHandlerPhysicalRegisterEx %RGp failed with %Rrc\n", GCPhysPage, rc));
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync Assert(!(pVM->pgm.s.fGlobalSyncFlags & PGM_GLOBAL_SYNC_CLEAR_PGM_POOL) || VMCPU_FF_ISSET(VMMGetCpu(pVM), VMCPU_FF_PGM_SYNC_CR3));
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Disables write monitoring of a guest page.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @returns VBox status code.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @retval VINF_SUCCESS on success.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param pPool The pool.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param pPage The cached page.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsyncstatic int pgmPoolMonitorFlush(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Filter out the relevant kinds.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync /* Nothing to monitor here. */
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync AssertFatalMsgFailed(("This can't happen! enmKind=%d\n", pPage->enmKind));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Remove the page from the monitored list or uninstall it if last.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync PPGMPOOLPAGE pNewHead = &pPool->aPages[pPage->iMonitoredNext];
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync rc = PGMHandlerPhysicalChangeCallbacks(pVM, pPage->GCPhys & ~(RTGCPHYS)(PAGE_SIZE - 1),
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->pfnAccessHandlerR3, MMHyperCCToR3(pVM, pNewHead),
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->pfnAccessHandlerR0, MMHyperCCToR0(pVM, pNewHead),
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->pfnAccessHandlerRC, MMHyperCCToRC(pVM, pNewHead),
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPage->iMonitoredPrev].iMonitoredNext = pPage->iMonitoredNext;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPage->iMonitoredNext].iMonitoredPrev = pPage->iMonitoredPrev;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync rc = PGMHandlerPhysicalDeregister(pVM, pPage->GCPhys & ~(RTGCPHYS)(PAGE_SIZE - 1));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync AssertMsg(!(pVM->pgm.s.fGlobalSyncFlags & PGM_GLOBAL_SYNC_CLEAR_PGM_POOL) || VMCPU_FF_ISSET(VMMGetCpu(pVM), VMCPU_FF_PGM_SYNC_CR3),
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync ("%#x %#x\n", pVM->pgm.s.fGlobalSyncFlags, pVM->fGlobalForcedActions));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Remove it from the list of modified pages (if in it).
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Inserts the page into the list of modified pages.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The page.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsyncvoid pgmPoolMonitorModifiedInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync Log3(("pgmPoolMonitorModifiedInsert: idx=%d\n", pPage->idx));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync ("Next=%d Prev=%d idx=%d cModifications=%d Head=%d cModifiedPages=%d\n",
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPage->iModifiedNext, pPage->iModifiedPrev, pPage->idx, pPage->cModifications,
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPool->iModifiedHead].iModifiedPrev = pPage->idx;
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync if (pPool->cModifiedPages > pPool->cModifiedPagesHigh)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Removes the page from the list of modified pages and resets the
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * moficiation counter.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPool The pool.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pPage The page which is believed to be in the list of modified pages.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsyncstatic void pgmPoolMonitorModifiedRemove(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync Log3(("pgmPoolMonitorModifiedRemove: idx=%d cModifications=%d\n", pPage->idx, pPage->cModifications));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPage->iModifiedNext].iModifiedPrev = NIL_PGMPOOL_IDX;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPage->iModifiedPrev].iModifiedNext = pPage->iModifiedNext;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPool->aPages[pPage->iModifiedNext].iModifiedPrev = pPage->iModifiedPrev;
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * Zaps the list of modified pages, resetting their modification counters in the process.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pVM The VM handle.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync LogFlow(("pgmPoolMonitorModifiedClearAll: cModifiedPages=%d\n", pPool->cModifiedPages));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync AssertMsg(cPages == pPool->cModifiedPages, ("%d != %d\n", cPages, pPool->cModifiedPages));
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Callback to clear all shadow pages and clear all modification counters.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @returns VBox status code.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pVM The VM handle.
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @param pvUser Unused parameter
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * @remark Should only be used when monitoring is available, thus placed in
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync * the PGMPOOL_WITH_MONITORING #ifdef.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsyncDECLCALLBACK(int) pgmPoolClearAll(PVM pVM, void *pvUser)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync LogFlow(("pgmPoolClearAll: cUsedPages=%d\n", pPool->cUsedPages));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Iterate all the pages until we've encountered all that in use.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * This is simple but not quite optimal solution.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync unsigned cModifiedPages = 0; NOREF(cModifiedPages);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * We only care about shadow page tables.
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsync void *pvShw = PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pPage);
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync /* fall thru */
d4a9d525e6f2111d462d2d96462dced6b9ec00efvboxsync Assert(!pPage->cModifications || ++cModifiedPages);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Assert(pPage->iModifiedNext == NIL_PGMPOOL_IDX || pPage->cModifications);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Assert(pPage->iModifiedPrev == NIL_PGMPOOL_IDX || pPage->cModifications);
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync /* swipe the special pages too. */
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync for (iPage = PGMPOOL_IDX_FIRST_SPECIAL; iPage < PGMPOOL_IDX_FIRST; iPage++)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Assert(!pPage->cModifications || ++cModifiedPages);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Assert(pPage->iModifiedNext == NIL_PGMPOOL_IDX || pPage->cModifications);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Assert(pPage->iModifiedPrev == NIL_PGMPOOL_IDX || pPage->cModifications);
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync AssertMsg(cModifiedPages == pPool->cModifiedPages, ("%d != %d\n", cModifiedPages, pPool->cModifiedPages));
c99b597540585068d22dde4c9f74730305f24097vboxsync * Clear all the GCPhys links and rebuild the phys ext free list.
c99b597540585068d22dde4c9f74730305f24097vboxsync for (PPGMRAMRANGE pRam = pPool->CTX_SUFF(pVM)->pgm.s.CTX_SUFF(pRamRanges);
c99b597540585068d22dde4c9f74730305f24097vboxsync while (iPage-- > 0)
c99b597540585068d22dde4c9f74730305f24097vboxsync PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
c99b597540585068d22dde4c9f74730305f24097vboxsync for (unsigned i = 0; i < cMaxPhysExts; i++)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync paPhysExts[cMaxPhysExts - 1].iNext = NIL_PGMPOOL_PHYSEXT_INDEX;
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync#endif /* IN_RING3 */
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * Handle SyncCR3 pool tasks
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @returns VBox status code.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @retval VINF_SUCCESS if successfully added.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * @retval VINF_PGM_SYNC_CR3 is it needs to be deferred to ring 3 (GC only)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pVM The VM handle.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @remark Should only be used when monitoring is available, thus placed in
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * the PGMPOOL_WITH_MONITORING #ifdef.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * When monitoring shadowed pages, we reset the modification counters on CR3 sync.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * Occasionally we will have to clear all the shadow page tables because we wanted
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * to monitor a page which was mapped by too many shadowed page tables. This operation
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync * sometimes refered to as a 'lightweight flush'.
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync# ifdef IN_RING3 /* Don't flush in ring-0 or raw mode, it's taking too long. */
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync if (ASMBitTestAndClear(&pVM->pgm.s.fGlobalSyncFlags, PGM_GLOBAL_SYNC_CLEAR_PGM_POOL_BIT))
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync VMMR3AtomicExecuteHandler(pVM, pgmPoolClearAll, NULL);
c99b597540585068d22dde4c9f74730305f24097vboxsync# else /* !IN_RING3 */
c99b597540585068d22dde4c9f74730305f24097vboxsync if (pVM->pgm.s.fGlobalSyncFlags & PGM_GLOBAL_SYNC_CLEAR_PGM_POOL)
02651f98b4320e70a300ba1ebe95270096ebfd4dvboxsync LogFlow(("SyncCR3: PGM_GLOBAL_SYNC_CLEAR_PGM_POOL is set -> VINF_PGM_SYNC_CR3\n"));
c99b597540585068d22dde4c9f74730305f24097vboxsync VMCPU_FF_SET(VMMGetCpu(pVM), VMCPU_FF_PGM_SYNC_CR3); /** @todo no need to do global sync, right? */
c99b597540585068d22dde4c9f74730305f24097vboxsync# endif /* !IN_RING3 */
0fd108a555ae02f2fb557d5f2c40281999b60d15vboxsync#endif /* PGMPOOL_WITH_MONITORING */
c99b597540585068d22dde4c9f74730305f24097vboxsync * Frees up at least one user entry.
c99b597540585068d22dde4c9f74730305f24097vboxsync * @returns VBox status code.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @retval VINF_SUCCESS if successfully added.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @retval VERR_PGM_POOL_FLUSHED if the pool was flushed.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPool The pool.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param iUser The user index.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncstatic int pgmPoolTrackFreeOneUser(PPGMPOOL pPool, uint16_t iUser)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * Just free cached pages in a braindead fashion.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync /** @todo walk the age list backwards and free the first with usage. */
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync } while (pPool->iUserFreeHead == NIL_PGMPOOL_USER_INDEX);
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * Lazy approach.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync /* @todo This path no longer works (CR3 root pages will be flushed)!! */
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * Inserts a page into the cache.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * This will create user node for the page, insert it into the GCPhys
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * hash, and insert it into the age list.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @returns VBox status code.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @retval VINF_SUCCESS if successfully added.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @retval VERR_PGM_POOL_FLUSHED if the pool was flushed.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param pPool The pool.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param pPage The cached page.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param GCPhys The GC physical address of the page we're gonna shadow.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param iUser The user index.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * @param iUserTable The user table index.
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsyncDECLINLINE(int) pgmPoolTrackInsert(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTGCPHYS GCPhys, uint16_t iUser, uint32_t iUserTable)
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync LogFlow(("pgmPoolTrackInsert GCPhys=%RGp iUser %x iUserTable %x\n", GCPhys, iUser, iUserTable));
35e6d303696e46d969aaf9a59cc381333a483b0bvboxsync * Check that the entry doesn't already exists.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync AssertMsg(paUsers[i].iUser != iUser || paUsers[i].iUserTable != iUserTable, ("%x %x vs new %x %x\n", paUsers[i].iUser, paUsers[i].iUserTable, iUser, iUserTable));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Find free a user node.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Unlink the user node from the free list,
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * initialize and insert it into the user list.
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync * Insert into cache and enable monitoring of the guest page if enabled.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Until we implement caching of all levels, including the CR3 one, we'll
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * have to make sure we don't try monitor & cache any recursive reuse of
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * a monitored CR3 page. Because all windows versions are doing this we'll
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * have to be able to do combined access monitoring, CR3 + PT and
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * PD + PT (guest PAE).
36f3c24e4ad9c6b813767db1faeabbe7e2ecc057vboxsync * We're now cooperating with the CR3 monitor if an uncachable page is found.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync#if defined(PGMPOOL_WITH_MONITORING) || defined(PGMPOOL_WITH_CACHE)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const bool fCanBeMonitored = true;
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync bool fCanBeMonitored = pPool->CTX_SUFF(pVM)->pgm.s.GCPhysGstCR3Monitored == NIL_RTGCPHYS
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync || (GCPhys & X86_PTE_PAE_PG_MASK) != (pPool->CTX_SUFF(pVM)->pgm.s.GCPhysGstCR3Monitored & X86_PTE_PAE_PG_MASK)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync pgmPoolCacheInsert(pPool, pPage, fCanBeMonitored); /* This can be expanded. */
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync#endif /* PGMPOOL_WITH_MONITORING */
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync# ifdef PGMPOOL_WITH_CACHE /* (only used when the cache is enabled.) */
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync * Adds a user reference to a page.
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync * This will move the page to the head of the
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync * @returns VBox status code.
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync * @retval VINF_SUCCESS if successfully added.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @retval VERR_PGM_POOL_FLUSHED if the pool was flushed.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pPool The pool.
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync * @param pPage The cached page.
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync * @param iUser The user index.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param iUserTable The user table.
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsyncstatic int pgmPoolTrackAddUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable)
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync Log3(("pgmPoolTrackAddUser GCPhys = %RGp iUser %x iUserTable %x\n", pPage->GCPhys, iUser, iUserTable));
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * Check that the entry doesn't already exists. We only allow multiple users of top-level paging structures (SHW_POOL_ROOT_IDX).
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync AssertMsg(iUser != PGMPOOL_IDX_PD || iUser != PGMPOOL_IDX_PDPT || iUser != PGMPOOL_IDX_NESTED_ROOT || iUser != PGMPOOL_IDX_AMD64_CR3 ||
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync paUsers[i].iUser != iUser || paUsers[i].iUserTable != iUserTable, ("%x %x vs new %x %x\n", paUsers[i].iUser, paUsers[i].iUserTable, iUser, iUserTable));
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * Allocate a user node.
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * Initialize the user node and insert it.
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * Tell the cache to update its replacement stats for this page.
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync# endif /* PGMPOOL_WITH_CACHE */
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * Frees a user record associated with a page.
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * This does not clear the entry in the user table, it simply replaces the
8bc8d66f188d5357155b8340e2d489573be2b607vboxsync * user record to the chain of free records.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPool The pool.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param HCPhys The HC physical address of the shadow page.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param iUser The shadow page pool index of the user table.
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync * @param iUserTable The index into the user table (shadowed).
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncstatic void pgmPoolTrackFreeUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, uint16_t iUser, uint32_t iUserTable)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * Unlink and free the specified user entry.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync Log3(("pgmPoolTrackFreeUser %RGp %x %x\n", pPage->GCPhys, iUser, iUserTable));
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync /* Special: For PAE and 32-bit paging, there is usually no more than one user. */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync /* General: Linear search. */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync /* Fatal: didn't find it */
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync AssertFatalMsgFailed(("Didn't find the user entry! iUser=%#x iUserTable=%#x GCPhys=%RGp\n",
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * Gets the entry size of a shadow table.
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync * @param enmKind The kind of page.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @returns The size of the entry in bytes. That is, 4 or 8.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @returns If the kind is not for a table, an assertion is raised and 0 is
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * returned.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncDECLINLINE(unsigned) pgmPoolTrackGetShadowEntrySize(PGMPOOLKIND enmKind)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Gets the entry size of a guest table.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param enmKind The kind of page.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * @returns The size of the entry in bytes. That is, 0, 4 or 8.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * @returns If the kind is not for a table, an assertion is raised and 0 is
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * returned.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncDECLINLINE(unsigned) pgmPoolTrackGetGuestEntrySize(PGMPOOLKIND enmKind)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync /** @todo can we return 0? (nobody is calling this...) */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Scans one shadow page table for mappings of a physical page.
06ea6bcf23874b662d499b3f130024c98b2dd7a6vboxsync * @param pVM The VM handle.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pPhysPage The guest page in question.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param iShw The shadow page table.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param cRefs The number of references made in that PT.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsyncstatic void pgmPoolTrackFlushGCPhysPTInt(PVM pVM, PCPGMPAGE pPhysPage, uint16_t iShw, uint16_t cRefs)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync LogFlow(("pgmPoolTrackFlushGCPhysPT: pPhysPage=%R[pgmpage] iShw=%d cRefs=%d\n", pPhysPage, iShw, cRefs));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Assert sanity.
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync AssertFatalMsg(iShw < pPool->cCurPages && iShw != NIL_PGMPOOL_IDX, ("iShw=%d\n", iShw));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * Then, clear the actual mappings to the page in the shadow PT.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const uint32_t u32 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync PX86PT pPT = (PX86PT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync if ((pPT->a[i].u & (X86_PTE_PG_MASK | X86_PTE_P)) == u32)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pte=%RX32 cRefs=%#x\n", i, pPT->a[i], cRefs));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pPT->a[i].u = 0;
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync RTLogPrintf("cRefs=%d iFirstPresent=%d cPresent=%d\n", cRefs, pPage->iFirstPresent, pPage->cPresent);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync if ((pPT->a[i].u & (X86_PTE_PG_MASK | X86_PTE_P)) == u32)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pPT->a[i].u = 0;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync AssertFatalMsgFailed(("cRefs=%d iFirstPresent=%d cPresent=%d\n", cRefs, pPage->iFirstPresent, pPage->cPresent));
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync PX86PTPAE pPT = (PX86PTPAE)PGMPOOL_PAGE_2_PTR(pVM, pPage);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync if ((pPT->a[i].u & (X86_PTE_PAE_PG_MASK | X86_PTE_P)) == u64)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pte=%RX64 cRefs=%#x\n", i, pPT->a[i], cRefs));
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync pPT->a[i].u = 0;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync RTLogPrintf("cRefs=%d iFirstPresent=%d cPresent=%d\n", cRefs, pPage->iFirstPresent, pPage->cPresent);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync if ((pPT->a[i].u & (X86_PTE_PAE_PG_MASK | X86_PTE_P)) == u64)
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync pPT->a[i].u = 0;
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync AssertFatalMsgFailed(("cRefs=%d iFirstPresent=%d cPresent=%d u64=%RX64\n", cRefs, pPage->iFirstPresent, pPage->cPresent, u64));
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync PEPTPT pPT = (PEPTPT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync if ((pPT->a[i].u & (EPT_PTE_PG_MASK | X86_PTE_P)) == u64)
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync Log4(("pgmPoolTrackFlushGCPhysPTs: i=%d pte=%RX64 cRefs=%#x\n", i, pPT->a[i], cRefs));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pPT->a[i].u = 0;
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync RTLogPrintf("cRefs=%d iFirstPresent=%d cPresent=%d\n", cRefs, pPage->iFirstPresent, pPage->cPresent);
58c0567dee3cc3ebe62dec1e27f8e35bac4ddeb0vboxsync if ((pPT->a[i].u & (EPT_PTE_PG_MASK | X86_PTE_P)) == u64)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pPT->a[i].u = 0;
9e17ca2e9d797e845e3284141dd4086a4b817ae5vboxsync AssertFatalMsgFailed(("cRefs=%d iFirstPresent=%d cPresent=%d\n", cRefs, pPage->iFirstPresent, pPage->cPresent));
9e17ca2e9d797e845e3284141dd4086a4b817ae5vboxsync AssertFatalMsgFailed(("enmKind=%d iShw=%d\n", pPage->enmKind, iShw));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Scans one shadow page table for mappings of a physical page.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pVM The VM handle.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pPhysPage The guest page in question.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param iShw The shadow page table.
9e17ca2e9d797e845e3284141dd4086a4b817ae5vboxsync * @param cRefs The number of references made in that PT.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsyncvoid pgmPoolTrackFlushGCPhysPT(PVM pVM, PPGMPAGE pPhysPage, uint16_t iShw, uint16_t cRefs)
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); NOREF(pPool);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync LogFlow(("pgmPoolTrackFlushGCPhysPT: pPhysPage=%R[pgmpage] iShw=%d cRefs=%d\n", pPhysPage, iShw, cRefs));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPT, f);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pgmPoolTrackFlushGCPhysPTInt(pVM, pPhysPage, iShw, cRefs);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPT, f);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Flushes a list of shadow page tables mapping the same physical page.
9e17ca2e9d797e845e3284141dd4086a4b817ae5vboxsync * @param pVM The VM handle.
9e17ca2e9d797e845e3284141dd4086a4b817ae5vboxsync * @param pPhysPage The guest page in question.
06ea6bcf23874b662d499b3f130024c98b2dd7a6vboxsync * @param iPhysExt The physical cross reference extent list to flush.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncvoid pgmPoolTrackFlushGCPhysPTs(PVM pVM, PPGMPAGE pPhysPage, uint16_t iPhysExt)
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPTs, f);
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync LogFlow(("pgmPoolTrackFlushGCPhysPTs: pPhysPage=%R[pgmpage] iPhysExt\n", pPhysPage, iPhysExt));
5366e994777f9d9391cf809dc77610f57270d75dvboxsync for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pgmPoolTrackFlushGCPhysPTInt(pVM, pPhysPage, pPhysExt->aidx[i], 1);
5366e994777f9d9391cf809dc77610f57270d75dvboxsync /* insert the list into the free list and clear the ram range entry. */
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTs, f);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync#endif /* PGMPOOL_WITH_GCPHYS_TRACKING */
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Flushes all shadow page table mappings of the given guest page.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * This is typically called when the host page backing the guest one has been
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * replaced or when the page protection was changed due to an access handler.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * @returns VBox status code.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * @retval VINF_SUCCESS if all references has been successfully cleared.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * @retval VINF_PGM_SYNC_CR3 if we're better off with a CR3 sync and a page
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * pool cleaning. FF and sync flags are set.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * @param pVM The VM handle.
b8bb9c9f6b8ebfd0a7d6df0c0289f9fe80241750vboxsync * @param pPhysPage The guest page in question.
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsync * @param pfFlushTLBs This is set to @a true if the shadow TLBs should be
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * flushed, it is NOT touched if this isn't necessary.
5366e994777f9d9391cf809dc77610f57270d75dvboxsync * The caller MUST initialized this to @a false.
d8e12fa5dd1c35282b98cb165e42b6b395cf971bvboxsyncint pgmPoolTrackFlushGCPhys(PVM pVM, PPGMPAGE pPhysPage, bool *pfFlushTLBs)
5366e994777f9d9391cf809dc77610f57270d75dvboxsync const uint16_t u16 = PGM_PAGE_GET_TRACKING(pPhysPage);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * The zero page is currently screwing up the tracking and we'll
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync * have to flush the whole shebang. Unless VBOX_WITH_NEW_LAZY_PAGE_ALLOC
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * is defined, zero pages won't normally be mapped. Some kind of solution
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * will be needed for this problem of course, but it will have to wait...
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync /* Start a subset here because pgmPoolTrackFlushGCPhysPTsSlow and
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync pgmPoolTrackFlushGCPhysPTs will/may kill the pool otherwise. */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync uint32_t iPrevSubset = PGMDynMapPushAutoSubset(pVCpu);
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync if (PGMPOOL_TD_GET_CREFS(u16) != PGMPOOL_TD_CREFS_PHYSEXT)
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync else if (u16 != PGMPOOL_TD_MAKE(PGMPOOL_TD_CREFS_PHYSEXT, PGMPOOL_TD_IDX_OVERFLOWED))
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync pgmPoolTrackFlushGCPhysPTs(pVM, pPhysPage, PGMPOOL_TD_GET_IDX(u16));
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync rc = pgmPoolTrackFlushGCPhysPTsSlow(pVM, pPhysPage);
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync /* Start a subset here because pgmPoolTrackFlushGCPhysPTsSlow kill the pool otherwise. */
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync uint32_t iPrevSubset = PGMDynMapPushAutoSubset(pVCpu);
4121d226ac899f17e13aff3aff42b603c8b5c1fevboxsync rc = pgmPoolTrackFlushGCPhysPTsSlow(pVM, pPhysPage);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pVM->pgm.s.fGlobalSyncFlags |= PGM_GLOBAL_SYNC_CLEAR_PGM_POOL;
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * Scans all shadow page tables for mappings of a physical page.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * This may be slow, but it's most likely more efficient than cleaning
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * out the entire page pool / cache.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * @returns VBox status code.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * @retval VINF_SUCCESS if all references has been successfully cleared.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @retval VINF_PGM_GCPHYS_ALIASED if we're better off with a CR3 sync and
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync * a page pool cleaning.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pVM The VM handle.
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync * @param pPhysPage The guest page in question.
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsyncint pgmPoolTrackFlushGCPhysPTsSlow(PVM pVM, PPGMPAGE pPhysPage)
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync STAM_PROFILE_START(&pPool->StatTrackFlushGCPhysPTsSlow, s);
e378dfdadd62aadc0a012c9953322d979d7606e6vboxsync LogFlow(("pgmPoolTrackFlushGCPhysPTsSlow: cUsedPages=%d cPresent=%d pPhysPage=%R[pgmpage]\n",
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * There is a limit to what makes sense.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync LogFlow(("pgmPoolTrackFlushGCPhysPTsSlow: giving up... (cPresent=%d)\n", pPool->cPresent));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTsSlow, s);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Iterate all the pages until we've encountered all that in use.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * This is simple but not quite optimal solution.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync const uint64_t u64 = PGM_PAGE_GET_HCPHYS(pPhysPage) | X86_PTE_P;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * We only care about shadow page tables.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync PX86PT pPT = (PX86PT)PGMPOOL_PAGE_2_PTR(pVM, pPage);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync if ((pPT->a[i].u & (X86_PTE_PG_MASK | X86_PTE_P)) == u32)
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync //Log4(("pgmPoolTrackFlushGCPhysPTsSlow: idx=%d i=%d pte=%RX32\n", iPage, i, pPT->a[i]));
5050fc8de0b121eab1b738d7c1007cde4903284dvboxsync pPT->a[i].u = 0;
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync PX86PTPAE pPT = (PX86PTPAE)PGMPOOL_PAGE_2_PTR(pVM, pPage);
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync for (unsigned i = pPage->iFirstPresent; i < RT_ELEMENTS(pPT->a); i++)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync if ((pPT->a[i].u & (X86_PTE_PAE_PG_MASK | X86_PTE_P)) == u64)
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync //Log4(("pgmPoolTrackFlushGCPhysPTsSlow: idx=%d i=%d pte=%RX64\n", iPage, i, pPT->a[i]));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync pPT->a[i].u = 0;
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync STAM_PROFILE_STOP(&pPool->StatTrackFlushGCPhysPTsSlow, s);
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync * Clears the user entry in a user table.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync * This is used to remove all references to a page when flushing it.
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsyncstatic void pgmPoolTrackClearPageUser(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PCPGMPOOLUSER pUser)
5f2b03bf7695dabd71222dba123532a3f76828c1vboxsync * Map the user page.
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync PPGMPOOLPAGE pUserPage = &pPool->aPages[pUser->iUser];
7862f4bd000f1eb6c86289f5ac2849e9cf943ca9vboxsync u.pau64 = (uint64_t *)PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pUserPage);
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync LogFlow(("pgmPoolTrackClearPageUser: clear %x in %s (%RGp) (flushing %s)\n", iUserTable, pgmPoolPoolKindToStr(pUserPage->enmKind), pUserPage->Core.Key, pgmPoolPoolKindToStr(pPage->enmKind)));
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync /* Safety precaution in case we change the paging for other modes too in the future. */
907b6adfa052386a0666d5557bee9bdbc100c2e5vboxsync Assert(!pgmPoolIsPageLocked(&pPool->CTX_SUFF(pVM)->pgm.s, pPage));
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Some sanity checks.
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
c55bf74b54ecdfb5ebc4e5d90b620d0fee31737evboxsync Assert(!(u.pau64[iUserTable] & PGM_PDFLAGS_MAPPING));
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync Assert(!(u.pau64[iUserTable] & PGM_PLXFLAGS_PERMANENT));
ed9d3db07648c7e3a979105c15ad752ee9ea18devboxsync /* GCPhys >> PAGE_SHIFT is the index here */
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync AssertMsgFailed(("enmKind=%d\n", pUserPage->enmKind));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync#endif /* VBOX_STRICT */
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync * Clear the entry in the user page.
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync /* 32-bit entries */
687794577e2e35c3cae67e692a7f2130d1262a82vboxsync /* 64-bit entries */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* In 32 bits PAE mode we *must* invalidate the TLB when changing a PDPT entry; the CPU fetches them only during cr3 load, so any
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * non-present PDPT will continue to cause page faults.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* no break */
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync AssertFatalMsgFailed(("enmKind=%d iUser=%#x iUserTable=%#x\n", pUserPage->enmKind, pUser->iUser, pUser->iUserTable));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Clears all users of a page.
06ea6bcf23874b662d499b3f130024c98b2dd7a6vboxsyncstatic void pgmPoolTrackClearPageUsers(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Free all the user records.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync LogFlow(("pgmPoolTrackClearPageUsers %RGp\n", pPage->GCPhys));
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync /* Clear enter in user table. */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync pgmPoolTrackClearPageUser(pPool, pPage, &paUsers[i]);
9523921c89c66f4bececdbd5ac95aed0039eda1bvboxsync /* Free it. */
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync /* Next. */
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Allocates a new physical cross reference extent.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @returns Pointer to the allocated extent on success. NULL if we're out of them.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * @param pVM The VM handle.
702a8ee2dc1de96f2f77e97135015d3e243186fdvboxsync * @param piPhysExt Where to store the phys ext index.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncPPGMPOOLPHYSEXT pgmPoolTrackPhysExtAlloc(PVM pVM, uint16_t *piPhysExt)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync STAM_COUNTER_INC(&pPool->StamTrackPhysExtAllocFailures);
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync PPGMPOOLPHYSEXT pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Frees a physical cross reference extent.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param pVM The VM handle.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param iPhysExt The extent to free.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsyncvoid pgmPoolTrackPhysExtFree(PVM pVM, uint16_t iPhysExt)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync PPGMPOOLPHYSEXT pPhysExt = &pPool->CTX_SUFF(paPhysExts)[iPhysExt];
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Frees a physical cross reference extent.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param pVM The VM handle.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param iPhysExt The extent to free.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsyncvoid pgmPoolTrackPhysExtFreeList(PVM pVM, uint16_t iPhysExt)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync for (unsigned i = 0; i < RT_ELEMENTS(pPhysExt->aidx); i++)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * Insert a reference into a list of physical cross reference extents.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @returns The new tracking data for PGMPAGE.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param pVM The VM handle.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param iPhysExt The physical extent index of the list head.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync * @param iShwPT The shadow page table index.
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsyncstatic uint16_t pgmPoolTrackPhysExtInsert(PVM pVM, uint16_t iPhysExt, uint16_t iShwPT)
9bff17fe6983cfda2ddd98f1979841bcb48e78e7vboxsync PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
if (!--cMax)
if (!pNew)
LogFlow(("pgmPoolTrackPhysExtAddref: added new extent %d:{%d}->%d\n", iPhysExt, iShwPT, iPhysExtStart));
if (pPhysExt)
LogFlow(("pgmPoolTrackPhysExtAddref: new extent: %d:{%d, %d}\n", iPhysExt, PGMPOOL_TD_GET_IDX(u16), iShwPT));
return u16;
AssertFatalMsg(cRefs == PGMPOOL_TD_CREFS_PHYSEXT, ("cRefs=%d pPhysPage=%R[pgmpage] pPage=%p:{.idx=%d}\n", cRefs, pPhysPage, pPage, pPage->idx));
Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d lonely\n", pPhysPage, pPage->idx));
Log2(("pgmPoolTrackPhysExtDerefGCPhys: pPhysPage=%R[pgmpage] idx=%d head\n", pPhysPage, pPage->idx));
AssertFatalMsgFailed(("not-found! cRefs=%d pPhysPage=%R[pgmpage] pPage=%p:{.idx=%d}\n", cRefs, pPhysPage, pPage, pPage->idx));
static void pgmPoolTracDerefGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTHCPHYS HCPhys, RTGCPHYS GCPhys)
while (pRam)
#ifdef LOG_ENABLED
static void pgmPoolTracDerefGCPhysHint(PPGMPOOL pPool, PPGMPOOLPAGE pPage, RTHCPHYS HCPhys, RTGCPHYS GCPhysHint)
while (pRam)
while (pRam)
while (iPage-- > 0)
DECLINLINE(void) pgmPoolTrackDerefPT32Bit32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PT pShwPT, PCX86PT pGstPT)
pgmPoolTracDerefGCPhysHint(pPool, pPage, pShwPT->a[i].u & X86_PTE_PG_MASK, pGstPT->a[i].u & X86_PTE_PG_MASK);
DECLINLINE(void) pgmPoolTrackDerefPTPae32Bit(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PTPAE pShwPT, PCX86PT pGstPT)
pgmPoolTracDerefGCPhysHint(pPool, pPage, pShwPT->a[i].u & X86_PTE_PAE_PG_MASK, pGstPT->a[i].u & X86_PTE_PG_MASK);
DECLINLINE(void) pgmPoolTrackDerefPTPaePae(PPGMPOOL pPool, PPGMPOOLPAGE pPage, PX86PTPAE pShwPT, PCX86PTPAE pGstPT)
pgmPoolTracDerefGCPhysHint(pPool, pPage, pShwPT->a[i].u & X86_PTE_PAE_PG_MASK, pGstPT->a[i].u & X86_PTE_PAE_PG_MASK);
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPD->a[i].u & X86_PDE_PG_MASK);
if (pSubPage)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPD->a[i].u & X86_PDE_PAE_PG_MASK);
if (pSubPage)
for (unsigned i = 0; i < X86_PG_PAE_PDPE_ENTRIES; i++)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPDPT->a[i].u & X86_PDPE_PG_MASK);
if (pSubPage)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPDPT->a[i].u & X86_PDPE_PG_MASK);
if (pSubPage)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPML4->a[i].u & X86_PDPE_PG_MASK);
if (pSubPage)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPD->a[i].u & EPT_PDE_PG_MASK);
if (pSubPage)
PPGMPOOLPAGE pSubPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, pShwPDPT->a[i].u & EPT_PDPTE_PG_MASK);
if (pSubPage)
#ifdef PGMPOOL_WITH_GCPHYS_TRACKING
void *pvGst;
void *pvGst;
void *pvGst;
case PGMPOOLKIND_PAE_PD_PHYS:
case PGMPOOLKIND_32BIT_PD:
case PGMPOOLKIND_PAE_PDPT:
case PGMPOOLKIND_64BIT_PML4:
#ifdef IN_RING3
#ifdef PGMPOOL_WITH_MONITORING
#ifdef PGMPOOL_WITH_USER_TRACKING
#ifdef PGMPOOL_WITH_CACHE
#ifdef PGMPOOL_WITH_USER_TRACKING
for (unsigned i = 0; i < cMaxUsers; i++)
#ifdef PGMPOOL_WITH_GCPHYS_TRACKING
pRam;
while (iPage-- > 0)
for (unsigned i = 0; i < cMaxPhysExts; i++)
#ifdef PGMPOOL_WITH_MONITORING
#ifdef PGMPOOL_WITH_CACHE
#ifdef PGMPOOL_WITH_MONITORING
# ifdef PGMPOOL_WITH_CACHE
#ifdef PGMPOOL_WITH_USER_TRACKING
#ifdef PGMPOOL_WITH_CACHE
Log(("pgmPoolFlushPage: special root page, rejected. enmKind=%s idx=%d\n", pgmPoolPoolKindToStr(pPage->enmKind), pPage->idx));
return VINF_SUCCESS;
("Can't free the shadow CR3! (%RHp vs %RHp kind=%d\n", PGMGetHyperCR3(VMMGetCpu(pVM)), pPage->Core.Key, pPage->enmKind));
Log(("pgmPoolFlushPage: current active shadow CR3, rejected. enmKind=%s idx=%d\n", pgmPoolPoolKindToStr(pPage->enmKind), pPage->idx));
return VINF_SUCCESS;
#ifdef PGMPOOL_WITH_USER_TRACKING
#ifdef PGMPOOL_WITH_CACHE
#ifdef PGMPOOL_WITH_MONITORING
return rc;
#ifdef PGMPOOL_WITH_USER_TRACKING
#ifdef PGMPOOL_WITH_CACHE
#if defined(IN_RC)
/* Hack alert: we can't deal with jumps to ring 3 when called from MapCR3 and allocating pages for PAE PDs. */
#ifdef IN_RING3
return rc;
return VINF_SUCCESS;
#ifdef PGMPOOL_WITH_CACHE
return VERR_PGM_POOL_FLUSHED;
int pgmPoolAlloc(PVM pVM, RTGCPHYS GCPhys, PGMPOOLKIND enmKind, uint16_t iUser, uint32_t iUserTable, PPPGMPOOLPAGE ppPage)
LogFlow(("pgmPoolAlloc: GCPhys=%RGp enmKind=%s iUser=%#x iUserTable=%#x\n", GCPhys, pgmPoolPoolKindToStr(enmKind), iUser, iUserTable));
/** @todo CSAM/PGMPrefetchPage messes up here during CSAMR3CheckGates
* Assert(!(pVM->pgm.s.fGlobalSyncFlags & PGM_GLOBAL_SYNC_CLEAR_PGM_POOL)); */
#ifdef PGMPOOL_WITH_CACHE
LogFlow(("pgmPoolAlloc: cached returns %Rrc *ppPage=%p:{.Key=%RHp, .idx=%d}\n", rc2, *ppPage, (*ppPage)->Core.Key, (*ppPage)->idx));
return rc2;
return rc;
pPool->cUsedPages++; /* physical handler registration / pgmPoolTrackFlushGCPhysPTsSlow requirement. */
#ifdef PGMPOOL_WITH_MONITORING
#ifdef PGMPOOL_WITH_USER_TRACKING
return rc3;
#ifdef VBOX_WITH_STATISTICS
LogFlow(("pgmPoolAlloc: returns %Rrc *ppPage=%p:{.Key=%RHp, .idx=%d, .fCached=%RTbool, .fMonitored=%RTbool}\n",
return rc;
PPGMPOOLPAGE pPage = (PPGMPOOLPAGE)RTAvloHCPhysGet(&pPool->HCPhysTree, HCPhys & X86_PTE_PAE_PG_MASK);
AssertFatalMsg(pPage && pPage->enmKind != PGMPOOLKIND_FREE, ("HCPhys=%RHp pPage=%p idx=%d\n", HCPhys, pPage, (pPage) ? pPage->idx : 0));
return pPage;
#ifdef IN_RING3
#ifdef LOG_ENABLED
switch(enmKind)
case PGMPOOLKIND_INVALID:
case PGMPOOLKIND_FREE:
case PGMPOOLKIND_32BIT_PD:
case PGMPOOLKIND_PAE_PD_PHYS:
case PGMPOOLKIND_PAE_PDPT:
case PGMPOOLKIND_64BIT_PML4:
case PGMPOOLKIND_ROOT_NESTED: