/* $Id: PGMR0.cpp 39402 2011-11-23 16:25:04Z vboxsync $ */ /** @file * PGM - Page Manager and Monitor, Ring-0. */ /* * Copyright (C) 2007-2011 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_PGM #include #include #include #include #include "PGMInternal.h" #include #include "PGMInline.h" #include #include #include #include /* * Instantiate the ring-0 header/code templates. */ #define PGM_BTH_NAME(name) PGM_BTH_NAME_32BIT_PROT(name) #include "PGMR0Bth.h" #undef PGM_BTH_NAME #define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_PROT(name) #include "PGMR0Bth.h" #undef PGM_BTH_NAME #define PGM_BTH_NAME(name) PGM_BTH_NAME_AMD64_PROT(name) #include "PGMR0Bth.h" #undef PGM_BTH_NAME #define PGM_BTH_NAME(name) PGM_BTH_NAME_EPT_PROT(name) #include "PGMR0Bth.h" #undef PGM_BTH_NAME /** * Worker function for PGMR3PhysAllocateHandyPages and pgmPhysEnsureHandyPage. * * @returns The following VBox status codes. * @retval VINF_SUCCESS on success. FF cleared. * @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is set in this case. * * @param pVM The VM handle. * @param pVCpu The VMCPU handle. * * @remarks Must be called from within the PGM critical section. The caller * must clear the new pages. */ VMMR0DECL(int) PGMR0PhysAllocateHandyPages(PVM pVM, PVMCPU pVCpu) { PGM_LOCK_ASSERT_OWNER_EX(pVM, pVCpu); /* * Check for error injection. */ if (RT_UNLIKELY(pVM->pgm.s.fErrInjHandyPages)) return VERR_NO_MEMORY; /* * Try allocate a full set of handy pages. */ uint32_t iFirst = pVM->pgm.s.cHandyPages; AssertReturn(iFirst <= RT_ELEMENTS(pVM->pgm.s.aHandyPages), VERR_PGM_HANDY_PAGE_IPE); uint32_t cPages = RT_ELEMENTS(pVM->pgm.s.aHandyPages) - iFirst; if (!cPages) return VINF_SUCCESS; int rc = GMMR0AllocateHandyPages(pVM, pVCpu->idCpu, cPages, cPages, &pVM->pgm.s.aHandyPages[iFirst]); if (RT_SUCCESS(rc)) { #ifdef VBOX_STRICT for (uint32_t i = 0; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++) { Assert(pVM->pgm.s.aHandyPages[i].idPage != NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].idPage <= GMM_PAGEID_LAST); Assert(pVM->pgm.s.aHandyPages[i].idSharedPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys != NIL_RTHCPHYS); Assert(!(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys & ~X86_PTE_PAE_PG_MASK)); } #endif pVM->pgm.s.cHandyPages = RT_ELEMENTS(pVM->pgm.s.aHandyPages); } else if (rc != VERR_GMM_SEED_ME) { if ( ( rc == VERR_GMM_HIT_GLOBAL_LIMIT || rc == VERR_GMM_HIT_VM_ACCOUNT_LIMIT) && iFirst < PGM_HANDY_PAGES_MIN) { #ifdef VBOX_STRICT /* We're ASSUMING that GMM has updated all the entires before failing us. */ uint32_t i; for (i = iFirst; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++) { Assert(pVM->pgm.s.aHandyPages[i].idPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].idSharedPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys == NIL_RTHCPHYS); } #endif /* * Reduce the number of pages until we hit the minimum limit. */ do { cPages >>= 1; if (cPages + iFirst < PGM_HANDY_PAGES_MIN) cPages = PGM_HANDY_PAGES_MIN - iFirst; rc = GMMR0AllocateHandyPages(pVM, pVCpu->idCpu, 0, cPages, &pVM->pgm.s.aHandyPages[iFirst]); } while ( ( rc == VERR_GMM_HIT_GLOBAL_LIMIT || rc == VERR_GMM_HIT_VM_ACCOUNT_LIMIT) && cPages + iFirst > PGM_HANDY_PAGES_MIN); if (RT_SUCCESS(rc)) { #ifdef VBOX_STRICT i = iFirst + cPages; while (i-- > 0) { Assert(pVM->pgm.s.aHandyPages[i].idPage != NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].idPage <= GMM_PAGEID_LAST); Assert(pVM->pgm.s.aHandyPages[i].idSharedPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys != NIL_RTHCPHYS); Assert(!(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys & ~X86_PTE_PAE_PG_MASK)); } for (i = cPages + iFirst; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++) { Assert(pVM->pgm.s.aHandyPages[i].idPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].idSharedPage == NIL_GMM_PAGEID); Assert(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys == NIL_RTHCPHYS); } #endif pVM->pgm.s.cHandyPages = iFirst + cPages; } } if (RT_FAILURE(rc) && rc != VERR_GMM_SEED_ME) { LogRel(("PGMR0PhysAllocateHandyPages: rc=%Rrc iFirst=%d cPages=%d\n", rc, iFirst, cPages)); VM_FF_SET(pVM, VM_FF_PGM_NO_MEMORY); } } LogFlow(("PGMR0PhysAllocateHandyPages: cPages=%d rc=%Rrc\n", cPages, rc)); return rc; } /** * Worker function for PGMR3PhysAllocateLargeHandyPage * * @returns The following VBox status codes. * @retval VINF_SUCCESS on success. * @retval VINF_EM_NO_MEMORY if we're out of memory. * * @param pVM The VM handle. * @param pVCpu The VMCPU handle. * * @remarks Must be called from within the PGM critical section. The caller * must clear the new pages. */ VMMR0DECL(int) PGMR0PhysAllocateLargeHandyPage(PVM pVM, PVMCPU pVCpu) { PGM_LOCK_ASSERT_OWNER_EX(pVM, pVCpu); Assert(!pVM->pgm.s.cLargeHandyPages); int rc = GMMR0AllocateLargePage(pVM, pVCpu->idCpu, _2M, &pVM->pgm.s.aLargeHandyPage[0].idPage, &pVM->pgm.s.aLargeHandyPage[0].HCPhysGCPhys); if (RT_SUCCESS(rc)) pVM->pgm.s.cLargeHandyPages = 1; return rc; } #ifdef VBOX_WITH_PCI_PASSTHROUGH /* Interface sketch. The interface belongs to a global PCI pass-through manager. It shall use the global VM handle, not the user VM handle to store the per-VM info (domain) since that is all ring-0 stuff, thus passing pGVM here. I've tentitively prefixed the functions 'GPciRawR0', we can discuss the PciRaw code re-organtization when I'm back from vacation. I've implemented the initial IOMMU set up below. For things to work reliably, we will probably need add a whole bunch of checks and GPciRawR0GuestPageUpdate call to the PGM code. For the present, assuming nested paging (enforced) and prealloc (enforced), no ballooning (check missing), page sharing (check missing) or live migration (check missing), it might work fine. At least if some VM power-off hook is present and can tear down the IOMMU page tables. */ /** * Tells the global PCI pass-through manager that we are about to set up the * guest page to host page mappings for the specfied VM. * * @returns VBox status code. * * @param pGVM The ring-0 VM structure. */ VMMR0_INT_DECL(int) GPciRawR0GuestPageBeginAssignments(PGVM pGVM) { NOREF(pGVM); return VINF_SUCCESS; } /** * Assigns a host page mapping for a guest page. * * This is only used when setting up the mappings, i.e. between * GPciRawR0GuestPageBeginAssignments and GPciRawR0GuestPageEndAssignments. * * @returns VBox status code. * @param pGVM The ring-0 VM structure. * @param GCPhys The address of the guest page (page aligned). * @param HCPhys The address of the host page (page aligned). */ VMMR0_INT_DECL(int) GPciRawR0GuestPageAssign(PGVM pGVM, RTGCPHYS GCPhys, RTHCPHYS HCPhys) { AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INTERNAL_ERROR_3); AssertReturn(!(HCPhys & PAGE_OFFSET_MASK), VERR_INTERNAL_ERROR_3); if (pGVM->rawpci.s.pfnContigMemInfo) /** @todo: what do we do on failure? */ pGVM->rawpci.s.pfnContigMemInfo(&pGVM->rawpci.s, HCPhys, GCPhys, PAGE_SIZE, PCIRAW_MEMINFO_MAP); return VINF_SUCCESS; } /** * Indicates that the specified guest page doesn't exists but doesn't have host * page mapping we trust PCI pass-through with. * * This is only used when setting up the mappings, i.e. between * GPciRawR0GuestPageBeginAssignments and GPciRawR0GuestPageEndAssignments. * * @returns VBox status code. * @param pGVM The ring-0 VM structure. * @param GCPhys The address of the guest page (page aligned). * @param HCPhys The address of the host page (page aligned). */ VMMR0_INT_DECL(int) GPciRawR0GuestPageUnassign(PGVM pGVM, RTGCPHYS GCPhys) { AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INTERNAL_ERROR_3); if (pGVM->rawpci.s.pfnContigMemInfo) /** @todo: what do we do on failure? */ pGVM->rawpci.s.pfnContigMemInfo(&pGVM->rawpci.s, 0, GCPhys, PAGE_SIZE, PCIRAW_MEMINFO_UNMAP); return VINF_SUCCESS; } /** * Tells the global PCI pass-through manager that we have completed setting up * the guest page to host page mappings for the specfied VM. * * This complements GPciRawR0GuestPageBeginAssignments and will be called even * if some page assignment failed. * * @returns VBox status code. * * @param pGVM The ring-0 VM structure. */ VMMR0_INT_DECL(int) GPciRawR0GuestPageEndAssignments(PGVM pGVM) { NOREF(pGVM); return VINF_SUCCESS; } /** * Tells the global PCI pass-through manager that a guest page mapping has * changed after the initial setup. * * @returns VBox status code. * @param pGVM The ring-0 VM structure. * @param GCPhys The address of the guest page (page aligned). * @param HCPhys The new host page address or NIL_RTHCPHYS if * now unassigned. */ VMMR0_INT_DECL(int) GPciRawR0GuestPageUpdate(PGVM pGVM, RTGCPHYS GCPhys, RTHCPHYS HCPhys) { AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INTERNAL_ERROR_4); AssertReturn(!(HCPhys & PAGE_OFFSET_MASK) || HCPhys == NIL_RTHCPHYS, VERR_INTERNAL_ERROR_4); NOREF(pGVM); return VINF_SUCCESS; } #endif /* VBOX_WITH_PCI_PASSTHROUGH */ /** * Sets up the IOMMU when raw PCI device is enabled. * * @note This is a hack that will probably be remodelled and refined later! * * @returns VBox status code. * * @param pVM The VM handle. */ VMMR0_INT_DECL(int) PGMR0PhysSetupIommu(PVM pVM) { PGVM pGVM; int rc = GVMMR0ByVM(pVM, &pGVM); if (RT_FAILURE(rc)) return rc; #ifdef VBOX_WITH_PCI_PASSTHROUGH if (pVM->pgm.s.fPciPassthrough) { /* * The Simplistic Approach - Enumerate all the pages and call tell the * IOMMU about each of them. */ pgmLock(pVM); rc = GPciRawR0GuestPageBeginAssignments(pGVM); if (RT_SUCCESS(rc)) { for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR0; RT_SUCCESS(rc) && pRam; pRam = pRam->pNextR0) { PPGMPAGE pPage = &pRam->aPages[0]; RTGCPHYS GCPhys = pRam->GCPhys; uint32_t cLeft = pRam->cb >> PAGE_SHIFT; while (cLeft-- > 0) { /* Only expose pages that are 100% safe for now. */ if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM && PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED && !PGM_PAGE_HAS_ANY_HANDLERS(pPage)) rc = GPciRawR0GuestPageAssign(pGVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage)); else rc = GPciRawR0GuestPageUnassign(pGVM, GCPhys); /* next */ pPage++; GCPhys += PAGE_SIZE; } } int rc2 = GPciRawR0GuestPageEndAssignments(pGVM); if (RT_FAILURE(rc2) && RT_SUCCESS(rc)) rc = rc2; } pgmUnlock(pVM); } else #endif rc = VERR_NOT_SUPPORTED; return rc; } /** * #PF Handler for nested paging. * * @returns VBox status code (appropriate for trap handling and GC return). * @param pVM VM Handle. * @param pVCpu VMCPU Handle. * @param enmShwPagingMode Paging mode for the nested page tables. * @param uErr The trap error code. * @param pRegFrame Trap register frame. * @param GCPhysFault The fault address. */ VMMR0DECL(int) PGMR0Trap0eHandlerNestedPaging(PVM pVM, PVMCPU pVCpu, PGMMODE enmShwPagingMode, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault) { int rc; LogFlow(("PGMTrap0eHandler: uErr=%RGx GCPhysFault=%RGp eip=%RGv\n", uErr, GCPhysFault, (RTGCPTR)pRegFrame->rip)); STAM_PROFILE_START(&pVCpu->pgm.s.StatRZTrap0e, a); STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = NULL; } ); /* AMD uses the host's paging mode; Intel has a single mode (EPT). */ AssertMsg( enmShwPagingMode == PGMMODE_32_BIT || enmShwPagingMode == PGMMODE_PAE || enmShwPagingMode == PGMMODE_PAE_NX || enmShwPagingMode == PGMMODE_AMD64 || enmShwPagingMode == PGMMODE_AMD64_NX || enmShwPagingMode == PGMMODE_EPT, ("enmShwPagingMode=%d\n", enmShwPagingMode)); /* Reserved shouldn't end up here. */ Assert(!(uErr & X86_TRAP_PF_RSVD)); #ifdef VBOX_WITH_STATISTICS /* * Error code stats. */ if (uErr & X86_TRAP_PF_US) { if (!(uErr & X86_TRAP_PF_P)) { if (uErr & X86_TRAP_PF_RW) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSNotPresentWrite); else STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSNotPresentRead); } else if (uErr & X86_TRAP_PF_RW) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSWrite); else if (uErr & X86_TRAP_PF_RSVD) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSReserved); else if (uErr & X86_TRAP_PF_ID) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSNXE); else STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eUSRead); } else { /* Supervisor */ if (!(uErr & X86_TRAP_PF_P)) { if (uErr & X86_TRAP_PF_RW) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eSVNotPresentWrite); else STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eSVNotPresentRead); } else if (uErr & X86_TRAP_PF_RW) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eSVWrite); else if (uErr & X86_TRAP_PF_ID) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eSNXE); else if (uErr & X86_TRAP_PF_RSVD) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eSVReserved); } #endif /* * Call the worker. * * Note! We pretend the guest is in protected mode without paging, so we * can use existing code to build the nested page tables. */ bool fLockTaken = false; switch(enmShwPagingMode) { case PGMMODE_32_BIT: rc = PGM_BTH_NAME_32BIT_PROT(Trap0eHandler)(pVCpu, uErr, pRegFrame, GCPhysFault, &fLockTaken); break; case PGMMODE_PAE: case PGMMODE_PAE_NX: rc = PGM_BTH_NAME_PAE_PROT(Trap0eHandler)(pVCpu, uErr, pRegFrame, GCPhysFault, &fLockTaken); break; case PGMMODE_AMD64: case PGMMODE_AMD64_NX: rc = PGM_BTH_NAME_AMD64_PROT(Trap0eHandler)(pVCpu, uErr, pRegFrame, GCPhysFault, &fLockTaken); break; case PGMMODE_EPT: rc = PGM_BTH_NAME_EPT_PROT(Trap0eHandler)(pVCpu, uErr, pRegFrame, GCPhysFault, &fLockTaken); break; default: AssertFailed(); rc = VERR_INVALID_PARAMETER; break; } if (fLockTaken) { PGM_LOCK_ASSERT_OWNER(pVM); pgmUnlock(pVM); } if (rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE) rc = VINF_SUCCESS; /* Note: hack alert for difficult to reproduce problem. */ else if ( rc == VERR_PAGE_NOT_PRESENT /* SMP only ; disassembly might fail. */ || rc == VERR_PAGE_TABLE_NOT_PRESENT /* seen with UNI & SMP */ || rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT /* seen with SMP */ || rc == VERR_PAGE_MAP_LEVEL4_NOT_PRESENT) /* precaution */ { Log(("WARNING: Unexpected VERR_PAGE_TABLE_NOT_PRESENT (%d) for page fault at %RGp error code %x (rip=%RGv)\n", rc, GCPhysFault, uErr, pRegFrame->rip)); /* Some kind of inconsistency in the SMP case; it's safe to just execute the instruction again; not sure about single VCPU VMs though. */ rc = VINF_SUCCESS; } STAM_STATS({ if (!pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution)) pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Misc; }); STAM_PROFILE_STOP_EX(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0e, pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution), a); return rc; } /** * #PF Handler for deliberate nested paging misconfiguration (/reserved bit) * employed for MMIO pages. * * @returns VBox status code (appropriate for trap handling and GC return). * @param pVM The VM Handle. * @param pVCpu The current CPU. * @param enmShwPagingMode Paging mode for the nested page tables. * @param pRegFrame Trap register frame. * @param GCPhysFault The fault address. * @param uErr The error code, UINT32_MAX if not available * (VT-x). */ VMMR0DECL(VBOXSTRICTRC) PGMR0Trap0eHandlerNPMisconfig(PVM pVM, PVMCPU pVCpu, PGMMODE enmShwPagingMode, PCPUMCTXCORE pRegFrame, RTGCPHYS GCPhysFault, uint32_t uErr) { #ifdef PGM_WITH_MMIO_OPTIMIZATIONS STAM_PROFILE_START(&pVCpu->CTX_SUFF(pStats)->StatR0NpMiscfg, a); VBOXSTRICTRC rc; /* * Try lookup the all access physical handler for the address. */ pgmLock(pVM); PPGMPHYSHANDLER pHandler = pgmHandlerPhysicalLookup(pVM, GCPhysFault); if (RT_LIKELY(pHandler && pHandler->enmType != PGMPHYSHANDLERTYPE_PHYSICAL_WRITE)) { /* * If the handle has aliases page or pages that have been temporarily * disabled, we'll have to take a detour to make sure we resync them * to avoid lots of unnecessary exits. */ PPGMPAGE pPage; if ( ( pHandler->cAliasedPages || pHandler->cTmpOffPages) && ( (pPage = pgmPhysGetPage(pVM, GCPhysFault)) == NULL || PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) == PGM_PAGE_HNDL_PHYS_STATE_DISABLED) ) { Log(("PGMR0Trap0eHandlerNPMisconfig: Resyncing aliases / tmp-off page at %RGp (uErr=%#x) %R[pgmpage]\n", GCPhysFault, uErr, pPage)); STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatR0NpMiscfgSyncPage); rc = pgmShwSyncNestedPageLocked(pVCpu, GCPhysFault, 1 /*cPages*/, enmShwPagingMode); pgmUnlock(pVM); } else { if (pHandler->CTX_SUFF(pfnHandler)) { CTX_MID(PFNPGM,PHYSHANDLER) pfnHandler = pHandler->CTX_SUFF(pfnHandler); void *pvUser = pHandler->CTX_SUFF(pvUser); STAM_PROFILE_START(&pHandler->Stat, h); pgmUnlock(pVM); Log6(("PGMR0Trap0eHandlerNPMisconfig: calling %p(,%#x,,%RGp,%p)\n", pfnHandler, uErr, GCPhysFault, pvUser)); rc = pfnHandler(pVM, uErr == UINT32_MAX ? RTGCPTR_MAX : uErr, pRegFrame, GCPhysFault, GCPhysFault, pvUser); #ifdef VBOX_WITH_STATISTICS pgmLock(pVM); pHandler = pgmHandlerPhysicalLookup(pVM, GCPhysFault); if (pHandler) STAM_PROFILE_STOP(&pHandler->Stat, h); pgmUnlock(pVM); #endif } else { pgmUnlock(pVM); Log(("PGMR0Trap0eHandlerNPMisconfig: %RGp (uErr=%#x) -> R3\n", GCPhysFault, uErr)); rc = VINF_EM_RAW_EMULATE_INSTR; } } } else { /* * Must be out of sync, so do a SyncPage and restart the instruction. * * ASSUMES that ALL handlers are page aligned and covers whole pages * (assumption asserted in PGMHandlerPhysicalRegisterEx). */ Log(("PGMR0Trap0eHandlerNPMisconfig: Out of sync page at %RGp (uErr=%#x)\n", GCPhysFault, uErr)); STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatR0NpMiscfgSyncPage); rc = pgmShwSyncNestedPageLocked(pVCpu, GCPhysFault, 1 /*cPages*/, enmShwPagingMode); pgmUnlock(pVM); } STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatR0NpMiscfg, a); return rc; #else AssertLogRelFailed(); return VERR_PGM_NOT_USED_IN_MODE; #endif }