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Diffstat (limited to 'src/VBox/VMM/include/PGMInline.h')
| -rw-r--r-- | src/VBox/VMM/include/PGMInline.h | 1210 |
1 files changed, 1210 insertions, 0 deletions
diff --git a/src/VBox/VMM/include/PGMInline.h b/src/VBox/VMM/include/PGMInline.h new file mode 100644 index 00000000..8a7164cf --- /dev/null +++ b/src/VBox/VMM/include/PGMInline.h @@ -0,0 +1,1210 @@ +/* $Id: PGMInline.h $ */ +/** @file + * PGM - Inlined functions. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + +#ifndef VMM_INCLUDED_SRC_include_PGMInline_h +#define VMM_INCLUDED_SRC_include_PGMInline_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <VBox/cdefs.h> +#include <VBox/types.h> +#include <VBox/err.h> +#include <VBox/vmm/stam.h> +#include <VBox/param.h> +#include <VBox/vmm/vmm.h> +#include <VBox/vmm/mm.h> +#include <VBox/vmm/pdmcritsect.h> +#include <VBox/vmm/pdmapi.h> +#include <VBox/dis.h> +#include <VBox/vmm/dbgf.h> +#include <VBox/log.h> +#include <VBox/vmm/gmm.h> +#include <VBox/vmm/hm.h> +#include <VBox/vmm/nem.h> +#include <iprt/asm.h> +#include <iprt/assert.h> +#include <iprt/avl.h> +#include <iprt/critsect.h> +#include <iprt/sha.h> + + + +/** @addtogroup grp_pgm_int Internals + * @internal + * @{ + */ + +/** + * Gets the PGMRAMRANGE structure for a guest page. + * + * @returns Pointer to the RAM range on success. + * @returns NULL on a VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS condition. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + */ +DECLINLINE(PPGMRAMRANGE) pgmPhysGetRange(PVMCC pVM, RTGCPHYS GCPhys) +{ + PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + if (!pRam || GCPhys - pRam->GCPhys >= pRam->cb) + return pgmPhysGetRangeSlow(pVM, GCPhys); + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + return pRam; +} + + +/** + * Gets the PGMRAMRANGE structure for a guest page, if unassigned get the ram + * range above it. + * + * @returns Pointer to the RAM range on success. + * @returns NULL if the address is located after the last range. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + */ +DECLINLINE(PPGMRAMRANGE) pgmPhysGetRangeAtOrAbove(PVMCC pVM, RTGCPHYS GCPhys) +{ + PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + if ( !pRam + || (GCPhys - pRam->GCPhys) >= pRam->cb) + return pgmPhysGetRangeAtOrAboveSlow(pVM, GCPhys); + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + return pRam; +} + + +/** + * Gets the PGMPAGE structure for a guest page. + * + * @returns Pointer to the page on success. + * @returns NULL on a VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS condition. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + */ +DECLINLINE(PPGMPAGE) pgmPhysGetPage(PVMCC pVM, RTGCPHYS GCPhys) +{ + PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + RTGCPHYS off; + if ( pRam + && (off = GCPhys - pRam->GCPhys) < pRam->cb) + { + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + return &pRam->aPages[off >> GUEST_PAGE_SHIFT]; + } + return pgmPhysGetPageSlow(pVM, GCPhys); +} + + +/** + * Gets the PGMPAGE structure for a guest page. + * + * Old Phys code: Will make sure the page is present. + * + * @returns VBox status code. + * @retval VINF_SUCCESS and a valid *ppPage on success. + * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if the address isn't valid. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + * @param ppPage Where to store the page pointer on success. + */ +DECLINLINE(int) pgmPhysGetPageEx(PVMCC pVM, RTGCPHYS GCPhys, PPPGMPAGE ppPage) +{ + PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + RTGCPHYS off; + if ( !pRam + || (off = GCPhys - pRam->GCPhys) >= pRam->cb) + return pgmPhysGetPageExSlow(pVM, GCPhys, ppPage); + *ppPage = &pRam->aPages[off >> GUEST_PAGE_SHIFT]; + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + return VINF_SUCCESS; +} + + +/** + * Gets the PGMPAGE structure for a guest page. + * + * Old Phys code: Will make sure the page is present. + * + * @returns VBox status code. + * @retval VINF_SUCCESS and a valid *ppPage on success. + * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if the address isn't valid. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + * @param ppPage Where to store the page pointer on success. + * @param ppRamHint Where to read and store the ram list hint. + * The caller initializes this to NULL before the call. + */ +DECLINLINE(int) pgmPhysGetPageWithHintEx(PVMCC pVM, RTGCPHYS GCPhys, PPPGMPAGE ppPage, PPGMRAMRANGE *ppRamHint) +{ + RTGCPHYS off; + PPGMRAMRANGE pRam = *ppRamHint; + if ( !pRam + || RT_UNLIKELY((off = GCPhys - pRam->GCPhys) >= pRam->cb)) + { + pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + if ( !pRam + || (off = GCPhys - pRam->GCPhys) >= pRam->cb) + return pgmPhysGetPageAndRangeExSlow(pVM, GCPhys, ppPage, ppRamHint); + + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + *ppRamHint = pRam; + } + *ppPage = &pRam->aPages[off >> GUEST_PAGE_SHIFT]; + return VINF_SUCCESS; +} + + +/** + * Gets the PGMPAGE structure for a guest page together with the PGMRAMRANGE. + * + * @returns Pointer to the page on success. + * @returns NULL on a VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS condition. + * + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + * @param ppPage Where to store the pointer to the PGMPAGE structure. + * @param ppRam Where to store the pointer to the PGMRAMRANGE structure. + */ +DECLINLINE(int) pgmPhysGetPageAndRangeEx(PVMCC pVM, RTGCPHYS GCPhys, PPPGMPAGE ppPage, PPGMRAMRANGE *ppRam) +{ + PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(apRamRangesTlb)[PGM_RAMRANGE_TLB_IDX(GCPhys)]; + RTGCPHYS off; + if ( !pRam + || (off = GCPhys - pRam->GCPhys) >= pRam->cb) + return pgmPhysGetPageAndRangeExSlow(pVM, GCPhys, ppPage, ppRam); + + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,RamRangeTlbHits)); + *ppRam = pRam; + *ppPage = &pRam->aPages[off >> GUEST_PAGE_SHIFT]; + return VINF_SUCCESS; +} + + +/** + * Convert GC Phys to HC Phys. + * + * @returns VBox status code. + * @param pVM The cross context VM structure. + * @param GCPhys The GC physical address. + * @param pHCPhys Where to store the corresponding HC physical address. + * + * @deprecated Doesn't deal with zero, shared or write monitored pages. + * Avoid when writing new code! + */ +DECLINLINE(int) pgmRamGCPhys2HCPhys(PVMCC pVM, RTGCPHYS GCPhys, PRTHCPHYS pHCPhys) +{ + PPGMPAGE pPage; + int rc = pgmPhysGetPageEx(pVM, GCPhys, &pPage); + if (RT_FAILURE(rc)) + return rc; + *pHCPhys = PGM_PAGE_GET_HCPHYS(pPage) | (GCPhys & GUEST_PAGE_OFFSET_MASK); + return VINF_SUCCESS; +} + + +/** + * Queries the Physical TLB entry for a physical guest page, + * attempting to load the TLB entry if necessary. + * + * @returns VBox status code. + * @retval VINF_SUCCESS on success + * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address. + * + * @param pVM The cross context VM structure. + * @param GCPhys The address of the guest page. + * @param ppTlbe Where to store the pointer to the TLB entry. + */ +DECLINLINE(int) pgmPhysPageQueryTlbe(PVMCC pVM, RTGCPHYS GCPhys, PPPGMPAGEMAPTLBE ppTlbe) +{ + int rc; + PPGMPAGEMAPTLBE pTlbe = &pVM->pgm.s.CTX_SUFF(PhysTlb).aEntries[PGM_PAGEMAPTLB_IDX(GCPhys)]; + if (pTlbe->GCPhys == (GCPhys & X86_PTE_PAE_PG_MASK)) + { + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,PageMapTlbHits)); + rc = VINF_SUCCESS; + } + else + rc = pgmPhysPageLoadIntoTlb(pVM, GCPhys); + *ppTlbe = pTlbe; + return rc; +} + + +/** + * Queries the Physical TLB entry for a physical guest page, + * attempting to load the TLB entry if necessary. + * + * @returns VBox status code. + * @retval VINF_SUCCESS on success + * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address. + * + * @param pVM The cross context VM structure. + * @param pPage Pointer to the PGMPAGE structure corresponding to + * GCPhys. + * @param GCPhys The address of the guest page. + * @param ppTlbe Where to store the pointer to the TLB entry. + */ +DECLINLINE(int) pgmPhysPageQueryTlbeWithPage(PVMCC pVM, PPGMPAGE pPage, RTGCPHYS GCPhys, PPPGMPAGEMAPTLBE ppTlbe) +{ + int rc; + PPGMPAGEMAPTLBE pTlbe = &pVM->pgm.s.CTX_SUFF(PhysTlb).aEntries[PGM_PAGEMAPTLB_IDX(GCPhys)]; + if (pTlbe->GCPhys == (GCPhys & X86_PTE_PAE_PG_MASK)) + { + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,PageMapTlbHits)); + rc = VINF_SUCCESS; + AssertPtr(pTlbe->pv); +#ifdef IN_RING3 + Assert(!pTlbe->pMap || RT_VALID_PTR(pTlbe->pMap->pv)); +#endif + } + else + rc = pgmPhysPageLoadIntoTlbWithPage(pVM, pPage, GCPhys); + *ppTlbe = pTlbe; + return rc; +} + + +/** + * Calculates NEM page protection flags. + */ +DECL_FORCE_INLINE(uint32_t) pgmPhysPageCalcNemProtection(PPGMPAGE pPage, PGMPAGETYPE enmType) +{ + /* + * Deal with potentially writable pages first. + */ + if (PGMPAGETYPE_IS_RWX(enmType)) + { + if (!PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)) + { + if (PGM_PAGE_IS_ALLOCATED(pPage)) + return NEM_PAGE_PROT_READ | NEM_PAGE_PROT_EXECUTE | NEM_PAGE_PROT_WRITE; + return NEM_PAGE_PROT_READ | NEM_PAGE_PROT_EXECUTE; + } + if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) + return NEM_PAGE_PROT_READ | NEM_PAGE_PROT_EXECUTE; + } + /* + * Potentially readable & executable pages. + */ + else if ( PGMPAGETYPE_IS_ROX(enmType) + && !PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) + return NEM_PAGE_PROT_READ | NEM_PAGE_PROT_EXECUTE; + + /* + * The rest is needs special access handling. + */ + return NEM_PAGE_PROT_NONE; +} + + +/** + * Enables write monitoring for an allocated page. + * + * The caller is responsible for updating the shadow page tables. + * + * @param pVM The cross context VM structure. + * @param pPage The page to write monitor. + * @param GCPhysPage The address of the page. + */ +DECLINLINE(void) pgmPhysPageWriteMonitor(PVMCC pVM, PPGMPAGE pPage, RTGCPHYS GCPhysPage) +{ + Assert(PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED); + PGM_LOCK_ASSERT_OWNER(pVM); + + PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_WRITE_MONITORED); + pVM->pgm.s.cMonitoredPages++; + + /* Large pages must disabled. */ + if (PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE) + { + PPGMPAGE pFirstPage = pgmPhysGetPage(pVM, GCPhysPage & X86_PDE2M_PAE_PG_MASK); + AssertFatal(pFirstPage); + if (PGM_PAGE_GET_PDE_TYPE(pFirstPage) == PGM_PAGE_PDE_TYPE_PDE) + { + PGM_PAGE_SET_PDE_TYPE(pVM, pFirstPage, PGM_PAGE_PDE_TYPE_PDE_DISABLED); + pVM->pgm.s.cLargePagesDisabled++; + } + else + Assert(PGM_PAGE_GET_PDE_TYPE(pFirstPage) == PGM_PAGE_PDE_TYPE_PDE_DISABLED); + } + +#ifdef VBOX_WITH_NATIVE_NEM + /* Tell NEM. */ + if (VM_IS_NEM_ENABLED(pVM)) + { + uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage); + PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage); + PPGMRAMRANGE pRam = pgmPhysGetRange(pVM, GCPhysPage); + NEMHCNotifyPhysPageProtChanged(pVM, GCPhysPage, PGM_PAGE_GET_HCPHYS(pPage), + pRam ? PGM_RAMRANGE_CALC_PAGE_R3PTR(pRam, GCPhysPage) : NULL, + pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State); + PGM_PAGE_SET_NEM_STATE(pPage, u2State); + } +#endif +} + + +/** + * Checks if the no-execute (NX) feature is active (EFER.NXE=1). + * + * Only used when the guest is in PAE or long mode. This is inlined so that we + * can perform consistency checks in debug builds. + * + * @returns true if it is, false if it isn't. + * @param pVCpu The cross context virtual CPU structure. + */ +DECL_FORCE_INLINE(bool) pgmGstIsNoExecuteActive(PVMCPUCC pVCpu) +{ + Assert(pVCpu->pgm.s.fNoExecuteEnabled == CPUMIsGuestNXEnabled(pVCpu)); + Assert(CPUMIsGuestInPAEMode(pVCpu) || CPUMIsGuestInLongMode(pVCpu)); + return pVCpu->pgm.s.fNoExecuteEnabled; +} + + +/** + * Checks if the page size extension (PSE) is currently enabled (CR4.PSE=1). + * + * Only used when the guest is in paged 32-bit mode. This is inlined so that + * we can perform consistency checks in debug builds. + * + * @returns true if it is, false if it isn't. + * @param pVCpu The cross context virtual CPU structure. + */ +DECL_FORCE_INLINE(bool) pgmGst32BitIsPageSizeExtActive(PVMCPUCC pVCpu) +{ + Assert(pVCpu->pgm.s.fGst32BitPageSizeExtension == CPUMIsGuestPageSizeExtEnabled(pVCpu)); + Assert(!CPUMIsGuestInPAEMode(pVCpu)); + Assert(!CPUMIsGuestInLongMode(pVCpu)); + return pVCpu->pgm.s.fGst32BitPageSizeExtension; +} + + +/** + * Calculated the guest physical address of the large (4 MB) page in 32 bits paging mode. + * Takes PSE-36 into account. + * + * @returns guest physical address + * @param pVM The cross context VM structure. + * @param Pde Guest Pde + */ +DECLINLINE(RTGCPHYS) pgmGstGet4MBPhysPage(PVMCC pVM, X86PDE Pde) +{ + RTGCPHYS GCPhys = Pde.u & X86_PDE4M_PG_MASK; + GCPhys |= (RTGCPHYS)(Pde.u & X86_PDE4M_PG_HIGH_MASK) << X86_PDE4M_PG_HIGH_SHIFT; + + return GCPhys & pVM->pgm.s.GCPhys4MBPSEMask; +} + + +/** + * Gets the address the guest page directory (32-bit paging). + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * @param ppPd Where to return the mapping. This is always set. + */ +DECLINLINE(int) pgmGstGet32bitPDPtrEx(PVMCPUCC pVCpu, PX86PD *ppPd) +{ + *ppPd = pVCpu->pgm.s.CTX_SUFF(pGst32BitPd); + if (RT_UNLIKELY(!*ppPd)) + return pgmGstLazyMap32BitPD(pVCpu, ppPd); + return VINF_SUCCESS; +} + + +/** + * Gets the address the guest page directory (32-bit paging). + * + * @returns Pointer to the page directory entry in question. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PD) pgmGstGet32bitPDPtr(PVMCPUCC pVCpu) +{ + PX86PD pGuestPD = pVCpu->pgm.s.CTX_SUFF(pGst32BitPd); + if (RT_UNLIKELY(!pGuestPD)) + { + int rc = pgmGstLazyMap32BitPD(pVCpu, &pGuestPD); + if (RT_FAILURE(rc)) + return NULL; + } + return pGuestPD; +} + + +/** + * Gets the guest page directory pointer table. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * @param ppPdpt Where to return the mapping. This is always set. + */ +DECLINLINE(int) pgmGstGetPaePDPTPtrEx(PVMCPUCC pVCpu, PX86PDPT *ppPdpt) +{ + *ppPdpt = pVCpu->pgm.s.CTX_SUFF(pGstPaePdpt); + if (RT_UNLIKELY(!*ppPdpt)) + return pgmGstLazyMapPaePDPT(pVCpu, ppPdpt); + return VINF_SUCCESS; +} + + +/** + * Gets the guest page directory pointer table. + * + * @returns Pointer to the page directory in question. + * @returns NULL if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PDPT) pgmGstGetPaePDPTPtr(PVMCPUCC pVCpu) +{ + PX86PDPT pGuestPdpt; + int rc = pgmGstGetPaePDPTPtrEx(pVCpu, &pGuestPdpt); + AssertMsg(RT_SUCCESS(rc) || rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); NOREF(rc); + return pGuestPdpt; +} + + +/** + * Gets the guest page directory pointer table entry for the specified address. + * + * @returns Pointer to the page directory in question. + * @returns NULL if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(PX86PDPE) pgmGstGetPaePDPEPtr(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + AssertGCPtr32(GCPtr); + + PX86PDPT pGuestPDPT = pVCpu->pgm.s.CTX_SUFF(pGstPaePdpt); + if (RT_UNLIKELY(!pGuestPDPT)) + { + int rc = pgmGstLazyMapPaePDPT(pVCpu, &pGuestPDPT); + if (RT_FAILURE(rc)) + return NULL; + } + return &pGuestPDPT->a[(uint32_t)GCPtr >> X86_PDPT_SHIFT]; +} + + +/** + * Gets the page directory entry for the specified address. + * + * @returns The page directory entry in question. + * @returns A non-present entry if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure of the calling EMT. + * @param GCPtr The address. + */ +DECLINLINE(X86PDEPAE) pgmGstGetPaePDE(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + AssertGCPtr32(GCPtr); + PX86PDPT pGuestPDPT = pgmGstGetPaePDPTPtr(pVCpu); + if (RT_LIKELY(pGuestPDPT)) + { + const unsigned iPdpt = (uint32_t)GCPtr >> X86_PDPT_SHIFT; + if ((pGuestPDPT->a[iPdpt].u & (pVCpu->pgm.s.fGstPaeMbzPdpeMask | X86_PDPE_P)) == X86_PDPE_P) + { + const unsigned iPD = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + PX86PDPAE pGuestPD = pVCpu->pgm.s.CTX_SUFF(apGstPaePDs)[iPdpt]; + if ( !pGuestPD + || (pGuestPDPT->a[iPdpt].u & X86_PDPE_PG_MASK) != pVCpu->pgm.s.aGCPhysGstPaePDs[iPdpt]) + pgmGstLazyMapPaePD(pVCpu, iPdpt, &pGuestPD); + if (pGuestPD) + return pGuestPD->a[iPD]; + } + } + + X86PDEPAE ZeroPde = {0}; + return ZeroPde; +} + + +/** + * Gets the page directory pointer table entry for the specified address + * and returns the index into the page directory + * + * @returns Pointer to the page directory in question. + * @returns NULL if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + * @param piPD Receives the index into the returned page directory + * @param pPdpe Receives the page directory pointer entry. Optional. + */ +DECLINLINE(PX86PDPAE) pgmGstGetPaePDPtr(PVMCPUCC pVCpu, RTGCPTR GCPtr, unsigned *piPD, PX86PDPE pPdpe) +{ + AssertGCPtr32(GCPtr); + + /* The PDPE. */ + PX86PDPT pGuestPDPT = pgmGstGetPaePDPTPtr(pVCpu); + if (pGuestPDPT) + { + const unsigned iPdpt = (uint32_t)GCPtr >> X86_PDPT_SHIFT; + X86PGPAEUINT const uPdpe = pGuestPDPT->a[iPdpt].u; + if (pPdpe) + pPdpe->u = uPdpe; + if ((uPdpe & (pVCpu->pgm.s.fGstPaeMbzPdpeMask | X86_PDPE_P)) == X86_PDPE_P) + { + + /* The PDE. */ + PX86PDPAE pGuestPD = pVCpu->pgm.s.CTX_SUFF(apGstPaePDs)[iPdpt]; + if ( !pGuestPD + || (uPdpe & X86_PDPE_PG_MASK) != pVCpu->pgm.s.aGCPhysGstPaePDs[iPdpt]) + pgmGstLazyMapPaePD(pVCpu, iPdpt, &pGuestPD); + *piPD = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + return pGuestPD; + } + } + return NULL; +} + + +/** + * Gets the page map level-4 pointer for the guest. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * @param ppPml4 Where to return the mapping. Always set. + */ +DECLINLINE(int) pgmGstGetLongModePML4PtrEx(PVMCPUCC pVCpu, PX86PML4 *ppPml4) +{ + *ppPml4 = pVCpu->pgm.s.CTX_SUFF(pGstAmd64Pml4); + if (RT_UNLIKELY(!*ppPml4)) + return pgmGstLazyMapPml4(pVCpu, ppPml4); + return VINF_SUCCESS; +} + + +/** + * Gets the page map level-4 pointer for the guest. + * + * @returns Pointer to the PML4 page. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PML4) pgmGstGetLongModePML4Ptr(PVMCPUCC pVCpu) +{ + PX86PML4 pGuestPml4; + int rc = pgmGstGetLongModePML4PtrEx(pVCpu, &pGuestPml4); + AssertMsg(RT_SUCCESS(rc) || rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); NOREF(rc); + return pGuestPml4; +} + + +/** + * Gets the pointer to a page map level-4 entry. + * + * @returns Pointer to the PML4 entry. + * @param pVCpu The cross context virtual CPU structure. + * @param iPml4 The index. + * @remarks Only used by AssertCR3. + */ +DECLINLINE(PX86PML4E) pgmGstGetLongModePML4EPtr(PVMCPUCC pVCpu, unsigned int iPml4) +{ + PX86PML4 pGuestPml4 = pVCpu->pgm.s.CTX_SUFF(pGstAmd64Pml4); + if (pGuestPml4) + { /* likely */ } + else + { + int rc = pgmGstLazyMapPml4(pVCpu, &pGuestPml4); + AssertRCReturn(rc, NULL); + } + return &pGuestPml4->a[iPml4]; +} + + +/** + * Gets the page directory entry for the specified address. + * + * @returns The page directory entry in question. + * @returns A non-present entry if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(X86PDEPAE) pgmGstGetLongModePDE(PVMCPUCC pVCpu, RTGCPTR64 GCPtr) +{ + /* + * Note! To keep things simple, ASSUME invalid physical addresses will + * cause X86_TRAP_PF_RSVD. This isn't a problem until we start + * supporting 52-bit wide physical guest addresses. + */ + PCX86PML4 pGuestPml4 = pgmGstGetLongModePML4Ptr(pVCpu); + if (RT_LIKELY(pGuestPml4)) + { + const unsigned iPml4 = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK; + X86PGPAEUINT const uPml4e = pGuestPml4->a[iPml4].u; + if ((uPml4e & (pVCpu->pgm.s.fGstAmd64MbzPml4eMask | X86_PML4E_P)) == X86_PML4E_P) + { + PCX86PDPT pPdptTemp; + int rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, uPml4e & X86_PML4E_PG_MASK, &pPdptTemp); + if (RT_SUCCESS(rc)) + { + const unsigned iPdpt = (GCPtr >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64; + X86PGPAEUINT const uPdpte = pPdptTemp->a[iPdpt].u; + if ((uPdpte & (pVCpu->pgm.s.fGstAmd64MbzPdpeMask | X86_PDPE_P)) == X86_PDPE_P) + { + PCX86PDPAE pPD; + rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, uPdpte & X86_PDPE_PG_MASK, &pPD); + if (RT_SUCCESS(rc)) + { + const unsigned iPD = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + return pPD->a[iPD]; + } + } + } + AssertMsg(RT_SUCCESS(rc) || rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); + } + } + + X86PDEPAE ZeroPde = {0}; + return ZeroPde; +} + + +/** + * Gets the GUEST page directory pointer for the specified address. + * + * @returns The page directory in question. + * @returns NULL if the page directory is not present or on an invalid page. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + * @param ppPml4e Page Map Level-4 Entry (out) + * @param pPdpe Page directory pointer table entry (out) + * @param piPD Receives the index into the returned page directory + */ +DECLINLINE(PX86PDPAE) pgmGstGetLongModePDPtr(PVMCPUCC pVCpu, RTGCPTR64 GCPtr, PX86PML4E *ppPml4e, PX86PDPE pPdpe, unsigned *piPD) +{ + /* The PMLE4. */ + PX86PML4 pGuestPml4 = pgmGstGetLongModePML4Ptr(pVCpu); + if (pGuestPml4) + { + const unsigned iPml4 = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK; + *ppPml4e = &pGuestPml4->a[iPml4]; + X86PGPAEUINT const uPml4e = pGuestPml4->a[iPml4].u; + if ((uPml4e & (pVCpu->pgm.s.fGstAmd64MbzPml4eMask | X86_PML4E_P)) == X86_PML4E_P) + { + /* The PDPE. */ + PCX86PDPT pPdptTemp; + int rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, uPml4e & X86_PML4E_PG_MASK, &pPdptTemp); + if (RT_SUCCESS(rc)) + { + const unsigned iPdpt = (GCPtr >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64; + X86PGPAEUINT const uPdpe = pPdptTemp->a[iPdpt].u; + pPdpe->u = uPdpe; + if ((uPdpe & (pVCpu->pgm.s.fGstAmd64MbzPdpeMask | X86_PDPE_P)) == X86_PDPE_P) + { + /* The PDE. */ + PX86PDPAE pPD; + rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, uPdpe & X86_PDPE_PG_MASK, &pPD); + if (RT_SUCCESS(rc)) + { + *piPD = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + return pPD; + } + AssertMsg(rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); + } + } + else + AssertMsg(rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); + } + } + return NULL; +} + + +#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT +# if 0 +/** + * Gets the pointer to a page map level-4 entry when the guest using EPT paging. + * + * @returns Pointer to the PML4 entry. + * @param pVCpu The cross context virtual CPU structure. + * @param iPml4 The index. + * @remarks Only used by AssertCR3. + */ +DECLINLINE(PEPTPML4E) pgmGstGetEptPML4EPtr(PVMCPUCC pVCpu, unsigned int iPml4) +{ + PEPTPML4 pEptPml4 = pVCpu->pgm.s.CTX_SUFF(pGstEptPml4); + if (pEptPml4) + { /* likely */ } + else + { + int const rc = pgmGstLazyMapEptPml4(pVCpu, &pEptPml4); + AssertRCReturn(rc, NULL); + } + return &pEptPml4->a[iPml4]; +} +# endif + + +/** + * Gets the page map level-4 pointer for the guest when the guest is using EPT + * paging. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * @param ppEptPml4 Where to return the mapping. Always set. + */ +DECLINLINE(int) pgmGstGetEptPML4PtrEx(PVMCPUCC pVCpu, PEPTPML4 *ppEptPml4) +{ + /* Shadow CR3 might not have been mapped at this point, see PGMHCChangeMode. */ + *ppEptPml4 = pVCpu->pgm.s.CTX_SUFF(pGstEptPml4); + if (!*ppEptPml4) + return pgmGstLazyMapEptPml4(pVCpu, ppEptPml4); + return VINF_SUCCESS; +} + + +# if 0 +/** + * Gets the page map level-4 pointer for the guest when the guest is using EPT + * paging. + * + * @returns Pointer to the EPT PML4 page. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PEPTPML4) pgmGstGetEptPML4Ptr(PVMCPUCC pVCpu) +{ + PEPTPML4 pEptPml4; + int rc = pgmGstGetEptPML4PtrEx(pVCpu, &pEptPml4); + AssertMsg(RT_SUCCESS(rc) || rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); NOREF(rc); + return pEptPml4; +} +# endif +#endif /* VBOX_WITH_NESTED_HWVIRT_VMX_EPT */ + + +/** + * Gets the shadow page directory, 32-bit. + * + * @returns Pointer to the shadow 32-bit PD. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PD) pgmShwGet32BitPDPtr(PVMCPUCC pVCpu) +{ + return (PX86PD)PGMPOOL_PAGE_2_PTR_V2(pVCpu->CTX_SUFF(pVM), pVCpu, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)); +} + + +/** + * Gets the shadow page directory entry for the specified address, 32-bit. + * + * @returns Shadow 32-bit PDE. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(X86PDE) pgmShwGet32BitPDE(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + PX86PD pShwPde = pgmShwGet32BitPDPtr(pVCpu); + if (!pShwPde) + { + X86PDE ZeroPde = {0}; + return ZeroPde; + } + return pShwPde->a[(uint32_t)GCPtr >> X86_PD_SHIFT]; +} + + +/** + * Gets the pointer to the shadow page directory entry for the specified + * address, 32-bit. + * + * @returns Pointer to the shadow 32-bit PDE. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(PX86PDE) pgmShwGet32BitPDEPtr(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + PX86PD pPde = pgmShwGet32BitPDPtr(pVCpu); + AssertReturn(pPde, NULL); + return &pPde->a[(uint32_t)GCPtr >> X86_PD_SHIFT]; +} + + +/** + * Gets the shadow page pointer table, PAE. + * + * @returns Pointer to the shadow PAE PDPT. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PDPT) pgmShwGetPaePDPTPtr(PVMCPUCC pVCpu) +{ + return (PX86PDPT)PGMPOOL_PAGE_2_PTR_V2(pVCpu->CTX_SUFF(pVM), pVCpu, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)); +} + + +/** + * Gets the shadow page directory for the specified address, PAE. + * + * @returns Pointer to the shadow PD. + * @param pVCpu The cross context virtual CPU structure. + * @param pPdpt Pointer to the page directory pointer table. + * @param GCPtr The address. + */ +DECLINLINE(PX86PDPAE) pgmShwGetPaePDPtr(PVMCPUCC pVCpu, PX86PDPT pPdpt, RTGCPTR GCPtr) +{ + const unsigned iPdpt = (uint32_t)GCPtr >> X86_PDPT_SHIFT; + if (pPdpt->a[iPdpt].u & X86_PDPE_P) + { + /* Fetch the pgm pool shadow descriptor. */ + PVMCC pVM = pVCpu->CTX_SUFF(pVM); + PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pVM->pgm.s.CTX_SUFF(pPool), pPdpt->a[iPdpt].u & X86_PDPE_PG_MASK); + AssertReturn(pShwPde, NULL); + + return (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPde); + } + return NULL; +} + + +/** + * Gets the shadow page directory for the specified address, PAE. + * + * @returns Pointer to the shadow PD. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(PX86PDPAE) pgmShwGetPaePDPtr(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + return pgmShwGetPaePDPtr(pVCpu, pgmShwGetPaePDPTPtr(pVCpu), GCPtr); +} + + +/** + * Gets the shadow page directory entry, PAE. + * + * @returns PDE. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(X86PDEPAE) pgmShwGetPaePDE(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + PX86PDPAE pShwPde = pgmShwGetPaePDPtr(pVCpu, GCPtr); + if (pShwPde) + return pShwPde->a[iPd]; + + X86PDEPAE ZeroPde = {0}; + return ZeroPde; +} + + +/** + * Gets the pointer to the shadow page directory entry for an address, PAE. + * + * @returns Pointer to the PDE. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + * @remarks Only used by AssertCR3. + */ +DECLINLINE(PX86PDEPAE) pgmShwGetPaePDEPtr(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK; + PX86PDPAE pShwPde = pgmShwGetPaePDPtr(pVCpu, GCPtr); + AssertReturn(pShwPde, NULL); + return &pShwPde->a[iPd]; +} + + +/** + * Gets the shadow page map level-4 pointer. + * + * @returns Pointer to the shadow PML4. + * @param pVCpu The cross context virtual CPU structure. + */ +DECLINLINE(PX86PML4) pgmShwGetLongModePML4Ptr(PVMCPUCC pVCpu) +{ + return (PX86PML4)PGMPOOL_PAGE_2_PTR_V2(pVCpu->CTX_SUFF(pVM), pVCpu, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)); +} + + +/** + * Gets the shadow page map level-4 entry for the specified address. + * + * @returns The entry. + * @param pVCpu The cross context virtual CPU structure. + * @param GCPtr The address. + */ +DECLINLINE(X86PML4E) pgmShwGetLongModePML4E(PVMCPUCC pVCpu, RTGCPTR GCPtr) +{ + const unsigned iPml4 = ((RTGCUINTPTR64)GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK; + PX86PML4 pShwPml4 = pgmShwGetLongModePML4Ptr(pVCpu); + if (pShwPml4) + return pShwPml4->a[iPml4]; + + X86PML4E ZeroPml4e = {0}; + return ZeroPml4e; +} + + +/** + * Gets the pointer to the specified shadow page map level-4 entry. + * + * @returns The entry. + * @param pVCpu The cross context virtual CPU structure. + * @param iPml4 The PML4 index. + */ +DECLINLINE(PX86PML4E) pgmShwGetLongModePML4EPtr(PVMCPUCC pVCpu, unsigned int iPml4) +{ + PX86PML4 pShwPml4 = pgmShwGetLongModePML4Ptr(pVCpu); + if (pShwPml4) + return &pShwPml4->a[iPml4]; + return NULL; +} + + +/** + * Cached physical handler lookup. + * + * @returns VBox status code. + * @retval VERR_NOT_FOUND if no handler. + * @param pVM The cross context VM structure. + * @param GCPhys The lookup address. + * @param ppHandler Where to return the handler pointer. + */ +DECLINLINE(int) pgmHandlerPhysicalLookup(PVMCC pVM, RTGCPHYS GCPhys, PPGMPHYSHANDLER *ppHandler) +{ + PPGMPHYSHANDLER pHandler = pVM->VMCC_CTX(pgm).s.PhysHandlerAllocator.ptrFromInt(pVM->pgm.s.idxLastPhysHandler); + if ( pHandler + && pVM->VMCC_CTX(pgm).s.PhysHandlerAllocator.isPtrRetOkay(pHandler) + && GCPhys >= pHandler->Key + && GCPhys < pHandler->KeyLast + && pHandler->hType != NIL_PGMPHYSHANDLERTYPE + && pHandler->hType != 0) + + { + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,PhysHandlerLookupHits)); + *ppHandler = pHandler; + return VINF_SUCCESS; + } + + STAM_COUNTER_INC(&pVM->pgm.s.Stats.CTX_MID_Z(Stat,PhysHandlerLookupMisses)); + AssertPtrReturn(pVM->VMCC_CTX(pgm).s.pPhysHandlerTree, VERR_PGM_HANDLER_IPE_1); + int rc = pVM->VMCC_CTX(pgm).s.pPhysHandlerTree->lookup(&pVM->VMCC_CTX(pgm).s.PhysHandlerAllocator, GCPhys, &pHandler); + if (RT_SUCCESS(rc)) + { + *ppHandler = pHandler; + pVM->pgm.s.idxLastPhysHandler = pVM->VMCC_CTX(pgm).s.PhysHandlerAllocator.ptrToInt(pHandler); + return VINF_SUCCESS; + } + *ppHandler = NULL; + return rc; +} + + +/** + * Converts a handle to a pointer. + * + * @returns Pointer on success, NULL on failure (asserted). + * @param pVM The cross context VM structure. + * @param hType Physical access handler type handle. + */ +DECLINLINE(PCPGMPHYSHANDLERTYPEINT) pgmHandlerPhysicalTypeHandleToPtr(PVMCC pVM, PGMPHYSHANDLERTYPE hType) +{ +#ifdef IN_RING0 + PPGMPHYSHANDLERTYPEINT pType = &pVM->pgmr0.s.aPhysHandlerTypes[hType & PGMPHYSHANDLERTYPE_IDX_MASK]; +#elif defined(IN_RING3) + PPGMPHYSHANDLERTYPEINT pType = &pVM->pgm.s.aPhysHandlerTypes[hType & PGMPHYSHANDLERTYPE_IDX_MASK]; +#else +# error "Invalid context" +#endif + AssertReturn(pType->hType == hType, NULL); + return pType; +} + + +/** + * Converts a handle to a pointer, never returns NULL. + * + * @returns Pointer on success, dummy on failure (asserted). + * @param pVM The cross context VM structure. + * @param hType Physical access handler type handle. + */ +DECLINLINE(PCPGMPHYSHANDLERTYPEINT) pgmHandlerPhysicalTypeHandleToPtr2(PVMCC pVM, PGMPHYSHANDLERTYPE hType) +{ +#ifdef IN_RING0 + PPGMPHYSHANDLERTYPEINT pType = &pVM->pgmr0.s.aPhysHandlerTypes[hType & PGMPHYSHANDLERTYPE_IDX_MASK]; +#elif defined(IN_RING3) + PPGMPHYSHANDLERTYPEINT pType = &pVM->pgm.s.aPhysHandlerTypes[hType & PGMPHYSHANDLERTYPE_IDX_MASK]; +#else +# error "Invalid context" +#endif + AssertReturn(pType->hType == hType, &g_pgmHandlerPhysicalDummyType); + return pType; +} + + +/** + * Internal worker for finding a 'in-use' shadow page give by it's physical address. + * + * @returns Pointer to the shadow page structure. + * @param pPool The pool. + * @param idx The pool page index. + */ +DECLINLINE(PPGMPOOLPAGE) pgmPoolGetPageByIdx(PPGMPOOL pPool, unsigned idx) +{ + AssertFatalMsg(idx >= PGMPOOL_IDX_FIRST && idx < pPool->cCurPages, ("idx=%d\n", idx)); + return &pPool->aPages[idx]; +} + + +/** + * Clear references to guest physical memory. + * + * @param pPool The pool. + * @param pPoolPage The pool page. + * @param pPhysPage The physical guest page tracking structure. + * @param iPte Shadow PTE index + */ +DECLINLINE(void) pgmTrackDerefGCPhys(PPGMPOOL pPool, PPGMPOOLPAGE pPoolPage, PPGMPAGE pPhysPage, uint16_t iPte) +{ + /* + * Just deal with the simple case here. + */ +#ifdef VBOX_STRICT + PVMCC pVM = pPool->CTX_SUFF(pVM); NOREF(pVM); +#endif +#ifdef LOG_ENABLED + const unsigned uOrg = PGM_PAGE_GET_TRACKING(pPhysPage); +#endif + const unsigned cRefs = PGM_PAGE_GET_TD_CREFS(pPhysPage); + if (cRefs == 1) + { + Assert(pPoolPage->idx == PGM_PAGE_GET_TD_IDX(pPhysPage)); + Assert(iPte == PGM_PAGE_GET_PTE_INDEX(pPhysPage)); + /* Invalidate the tracking data. */ + PGM_PAGE_SET_TRACKING(pVM, pPhysPage, 0); + } + else + pgmPoolTrackPhysExtDerefGCPhys(pPool, pPoolPage, pPhysPage, iPte); + Log2(("pgmTrackDerefGCPhys: %x -> %x pPhysPage=%R[pgmpage]\n", uOrg, PGM_PAGE_GET_TRACKING(pPhysPage), pPhysPage )); +} + + +/** + * Moves the page to the head of the age list. + * + * This is done when the cached page is used in one way or another. + * + * @param pPool The pool. + * @param pPage The cached page. + */ +DECLINLINE(void) pgmPoolCacheUsed(PPGMPOOL pPool, PPGMPOOLPAGE pPage) +{ + PGM_LOCK_ASSERT_OWNER(pPool->CTX_SUFF(pVM)); + + /* + * Move to the head of the age list. + */ + if (pPage->iAgePrev != NIL_PGMPOOL_IDX) + { + /* unlink */ + pPool->aPages[pPage->iAgePrev].iAgeNext = pPage->iAgeNext; + if (pPage->iAgeNext != NIL_PGMPOOL_IDX) + pPool->aPages[pPage->iAgeNext].iAgePrev = pPage->iAgePrev; + else + pPool->iAgeTail = pPage->iAgePrev; + + /* insert at head */ + pPage->iAgePrev = NIL_PGMPOOL_IDX; + pPage->iAgeNext = pPool->iAgeHead; + Assert(pPage->iAgeNext != NIL_PGMPOOL_IDX); /* we would've already been head then */ + pPool->iAgeHead = pPage->idx; + pPool->aPages[pPage->iAgeNext].iAgePrev = pPage->idx; + } +} + + +/** + * Locks a page to prevent flushing (important for cr3 root pages or shadow pae pd pages). + * + * @param pPool The pool. + * @param pPage PGM pool page + */ +DECLINLINE(void) pgmPoolLockPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage) +{ + PGM_LOCK_ASSERT_OWNER(pPool->CTX_SUFF(pVM)); NOREF(pPool); + ASMAtomicIncU32(&pPage->cLocked); +} + + +/** + * Unlocks a page to allow flushing again + * + * @param pPool The pool. + * @param pPage PGM pool page + */ +DECLINLINE(void) pgmPoolUnlockPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage) +{ + PGM_LOCK_ASSERT_OWNER(pPool->CTX_SUFF(pVM)); NOREF(pPool); + Assert(pPage->cLocked); + ASMAtomicDecU32(&pPage->cLocked); +} + + +/** + * Checks if the page is locked (e.g. the active CR3 or one of the four PDs of a PAE PDPT) + * + * @returns VBox status code. + * @param pPage PGM pool page + */ +DECLINLINE(bool) pgmPoolIsPageLocked(PPGMPOOLPAGE pPage) +{ + if (pPage->cLocked) + { + LogFlow(("pgmPoolIsPageLocked found root page %d\n", pPage->enmKind)); + if (pPage->cModifications) + pPage->cModifications = 1; /* reset counter (can't use 0, or else it will be reinserted in the modified list) */ + return true; + } + return false; +} + + +/** + * Check if the specified page is dirty (not write monitored) + * + * @return dirty or not + * @param pVM The cross context VM structure. + * @param GCPhys Guest physical address + */ +DECLINLINE(bool) pgmPoolIsDirtyPage(PVMCC pVM, RTGCPHYS GCPhys) +{ + PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); + PGM_LOCK_ASSERT_OWNER(pVM); + if (!pPool->cDirtyPages) + return false; + return pgmPoolIsDirtyPageSlow(pVM, GCPhys); +} + + +/** @} */ + +#endif /* !VMM_INCLUDED_SRC_include_PGMInline_h */ + |