VMM/VMMAll/PGMAllShw.h

	PGMAllShw.h revision 5476bd9ec30ebad9ed9e39aa8a4ff2c49bede2d7
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/* $Id$ */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/** @file
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * VBox - Page Manager, Shadow Paging Template - All context code.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/*
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync * Copyright (C) 2006-2007 innotek GmbH
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * available from http://www.virtualbox.org. This file is free software;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * you can redistribute it and/or modify it under the terms of the GNU
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * General Public License (GPL) as published by the Free Software
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync */
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync/*******************************************************************************
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync*   Defined Constants And Macros                                               *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync*******************************************************************************/
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHWPT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef PSHWPT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHWPTE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef PSHWPTE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHWPD
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef PSHWPD
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHWPDE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef PSHWPDE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PDE_PG_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PD_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PD_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PTE_PG_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PT_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PT_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_TOTAL_PD_ENTRIES
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PDPTR_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_PDPTR_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#undef SHW_POOL_ROOT_IDX
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if PGM_SHW_TYPE == PGM_TYPE_32BIT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPT                  X86PT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPT                 PX86PT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPTE                 X86PTE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPTE                PX86PTE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPD                  X86PD
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPD                 PX86PD
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPDE                 X86PDE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPDE                PX86PDE
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync# define SHW_PDE_PG_MASK        X86_PDE_PG_MASK
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync# define SHW_PD_SHIFT           X86_PD_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PD_MASK            X86_PD_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_TOTAL_PD_ENTRIES   X86_PG_ENTRIES
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PTE_PG_MASK        X86_PTE_PG_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PT_SHIFT           X86_PT_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PT_MASK            X86_PT_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_POOL_ROOT_IDX      PGMPOOL_IDX_PD
afed5ab737f4aacfae3fe73776f40e989190a7cavboxsync#else
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPT                  X86PTPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPT                 PX86PTPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPTE                 X86PTEPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPTE                PX86PTEPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPD                  X86PDPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPD                 PX86PDPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHWPDE                 X86PDEPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define PSHWPDE                PX86PDEPAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PDE_PG_MASK        X86_PDE_PAE_PG_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PD_SHIFT           X86_PD_PAE_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PD_MASK            X86_PD_PAE_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PTE_PG_MASK        X86_PTE_PAE_PG_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PT_SHIFT           X86_PT_PAE_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PT_MASK            X86_PT_PAE_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if PGM_SHW_TYPE == PGM_TYPE_AMD64
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PDPTR_SHIFT        X86_PDPTR_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PDPTR_MASK         X86_PDPTR_MASK
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_POOL_ROOT_IDX      PGMPOOL_IDX_PML4
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else /* 32 bits PAE mode */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PDPTR_SHIFT        X86_PDPTR_SHIFT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_PDPTR_MASK         X86_PDPTR_MASK_32
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_TOTAL_PD_ENTRIES   (X86_PG_PAE_ENTRIES*X86_PG_PAE_PDPTE_ENTRIES)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# define SHW_POOL_ROOT_IDX      PGMPOOL_IDX_PAE_PD
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/*******************************************************************************
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync*   Internal Functions                                                         *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync*******************************************************************************/
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync__BEGIN_DECLS
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, GetPage)(PVM pVM, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTHCPHYS pHCPhys);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, ModifyPage)(PVM pVM, RTGCUINTPTR GCPtr, size_t cbPages, uint64_t fFlags, uint64_t fMask);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, GetPDEByIndex)(PVM pVM, uint32_t iPD, PX86PDEPAE pPde);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, SetPDEByIndex)(PVM pVM, uint32_t iPD, X86PDEPAE Pde);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, ModifyPDEByIndex)(PVM pVM, uint32_t iPD, uint64_t fFlags, uint64_t fMask);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync__END_DECLS
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/**
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * Gets effective page information (from the VMM page directory).
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @returns VBox status.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   pVM         VM Handle.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   GCPtr       Guest Context virtual address of the page.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   pfFlags     Where to store the flags. These are X86_PTE_*.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   pHCPhys     Where to store the HC physical address of the page.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *                      This is page aligned.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @remark  You should use PGMMapGetPage() for pages in a mapping.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, GetPage)(PVM pVM, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTHCPHYS pHCPhys)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync{
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     * Get the PDE.
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync     */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if PGM_SHW_TYPE == PGM_TYPE_AMD64
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync    /*
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync     * For the first 4G we have preallocated page directories.
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync     * Since the two upper levels contains only fixed flags, we skip those when possible.
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync     */
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync    X86PDEPAE Pde;
fdea543f71872a3ec3909536a4fce37ab7aa3a8bvboxsync#if GC_ARCH_BITS == 64
8f7bc6ad2b7bbcb4b3b96248cd2478e45f2e3b88vboxsync    if (GCPtr < _4G)
8f7bc6ad2b7bbcb4b3b96248cd2478e45f2e3b88vboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT)  & X86_PDPTR_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPd    = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        Pde = CTXMID(pVM->pgm.s.ap,PaePDs)[iPdptr]->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if GC_ARCH_BITS == 64
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    else
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /* PML4 */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPml4  = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        X86PML4E Pml4e = CTXMID(pVM->pgm.s.p,PaePML4)->a[iPml4];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (!Pml4e.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /* PDPTR */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        PX86PDPTR pPdPtr;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        int rc = PGM_HCPHYS_2_PTR(pVM, Pml4e.u & X86_PML4E_PG_MASK, &pPdPtr);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return rc;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT) & X86_PDPTR_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        X86PDPE Pdpe = pPdPtr->a[iPdptr];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (!Pdpe.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /* PD */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        PX86PDPAE pPd;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        rc = PGM_HCPHYS_2_PTR(pVM, Pdpe.u & X86_PDPE_PG_MASK, &pPd);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return rc;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        Pdpe = pPdPtr->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif /* GC_ARCH_BITS == 64 */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
a11c569636fa6838bd423f4631a9660a5a84204bvboxsync#elif PGM_SHW_TYPE == PGM_TYPE_PAE
a11c569636fa6838bd423f4631a9660a5a84204bvboxsync    const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT) & X86_PDPTR_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    X86PDEPAE Pde = CTXMID(pVM->pgm.s.ap,PaePDs)[iPdptr]->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else /* PGM_TYPE_32BIT */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    const unsigned iPd = (GCPtr >> X86_PD_SHIFT) & X86_PD_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    X86PDE Pde = CTXMID(pVM->pgm.s.p,32BitPD)->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    if (!Pde.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     * Get PT entry.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    PSHWPT pPT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    if (!(Pde.u & PGM_PDFLAGS_MAPPING))
3ecf9412133496b2aeb090cfd33a286404ec59fbvboxsync    {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        int rc = PGM_HCPHYS_2_PTR(pVM, Pde.u & SHW_PDE_PG_MASK, &pPT);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return rc;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    else /* mapping: */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        PPGMMAPPING pMap = pgmGetMapping(pVM, (RTGCPTR)GCPtr);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        AssertMsgReturn(pMap, ("GCPtr=%VGv\n", GCPtr), VERR_INTERNAL_ERROR);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if PGM_SHW_TYPE == PGM_TYPE_32BIT
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        pPT = pMap->aPTs[(GCPtr - pMap->GCPtr) >> X86_PD_SHIFT].CTXALLSUFF(pPT);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else /* PAE and AMD64: */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        pPT = pMap->aPTs[(GCPtr - pMap->GCPtr) >> X86_PD_SHIFT].CTXALLSUFF(paPaePTs);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    const unsigned iPt = (GCPtr >> SHW_PT_SHIFT) & SHW_PT_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    SHWPTE Pte = pPT->a[iPt];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    if (!Pte.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        return VERR_PAGE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    /*
aaeb2e2f6ed5b164f1dec9a16a7adeb84f64cf31vboxsync     * Store the results.
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync     * RW and US flags depend on the entire page transation hierarchy - except for
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     * legacy PAE which has a simplified PDPE.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    if (pfFlags)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        *pfFlags = (Pte.u & ~SHW_PTE_PG_MASK)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                 & ((Pde.u & (X86_PTE_RW | X86_PTE_US)) | ~(uint64_t)(X86_PTE_RW | X86_PTE_US));
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    if (pHCPhys)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        *pHCPhys = Pte.u & SHW_PTE_PG_MASK;
aaeb2e2f6ed5b164f1dec9a16a7adeb84f64cf31vboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    return VINF_SUCCESS;
aaeb2e2f6ed5b164f1dec9a16a7adeb84f64cf31vboxsync}
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/**
78a205e3fc6719d59e8c561b3d287d3a4f879852vboxsync * Modify page flags for a range of pages in the shadow context.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * The existing flags are ANDed with the fMask and ORed with the fFlags.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *
aaeb2e2f6ed5b164f1dec9a16a7adeb84f64cf31vboxsync * @returns VBox status code.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   pVM         VM handle.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   GCPtr       Virtual address of the first page in the range. Page aligned!
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   cb          Size (in bytes) of the range to apply the modification to. Page aligned!
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   fFlags      The OR  mask - page flags X86_PTE_*, excluding the page mask of course.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   fMask       The AND mask - page flags X86_PTE_*.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *                      Be extremely CAREFUL with ~'ing values because they can be 32-bit!
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @remark  You must use PGMMapModifyPage() for pages in a mapping.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsyncPGM_SHW_DECL(int, ModifyPage)(PVM pVM, RTGCUINTPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync{
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     * Walk page tables and pages till we're done.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    for (;;)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         * Get the PDE.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if PGM_SHW_TYPE == PGM_TYPE_AMD64
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         * For the first 4G we have preallocated page directories.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         * Since the two upper levels contains only fixed flags, we skip those when possible.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        X86PDEPAE Pde;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#if GC_ARCH_BITS == 64
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (GCPtr < _4G)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT)  & X86_PDPTR_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            const unsigned iPd    = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            Pde = CTXMID(pVM->pgm.s.ap,PaePDs)[iPdptr]->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        }
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync#if GC_ARCH_BITS == 64
9782b553bdb12385214a3ac596aff1476bcb7cbdvboxsync        else
8a132edc1577cbe2a19cd778c1b2bea6ae5e8515vboxsync        {
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync            /* PML4 */
8a132edc1577cbe2a19cd778c1b2bea6ae5e8515vboxsync            const unsigned iPml4  = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            X86PML4E Pml4e = CTXMID(pVM->pgm.s.p,PaePML4)->a[iPml4];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (!Pml4e.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            /* PDPTR */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            PX86PDPTR pPdPtr;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            int rc = PGM_HCPHYS_2_PTR(pVM, Pml4e.u & X86_PML4E_PG_MASK, &pPdPtr);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                return rc;
f9147fe1eaa4e35287f8f39282c7f92f0d7de0b7vboxsync            const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT) & X86_PDPTR_MASK;
585f64d6f624f9e683321dabeb21b0eb2e6aa473vboxsync            X86PDPE Pdpe = pPdPtr->a[iPdptr];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (!Pdpe.n.u1Present)
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync                return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            /* PD */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            PX86PDPAE pPd;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            rc = PGM_HCPHYS_2_PTR(pVM, Pdpe.u & X86_PDPE_PG_MASK, &pPd);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                return rc;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            Pdpe = pPdPtr->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif /* GC_ARCH_BITS == 64 */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#elif PGM_SHW_TYPE == PGM_TYPE_PAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPdptr = (GCPtr >> X86_PDPTR_SHIFT) & X86_PDPTR_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPd = (GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        X86PDEPAE Pde = CTXMID(pVM->pgm.s.ap,PaePDs)[iPdptr]->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else /* PGM_TYPE_32BIT */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        const unsigned iPd = (GCPtr >> X86_PD_SHIFT) & X86_PD_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        X86PDE Pde = CTXMID(pVM->pgm.s.p,32BitPD)->a[iPd];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (!Pde.n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return VERR_PAGE_TABLE_NOT_PRESENT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         * Map the page table.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync         */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        PSHWPT pPT;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        int rc = PGM_HCPHYS_2_PTR(pVM, Pde.u & SHW_PDE_PG_MASK, &pPT);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        if (VBOX_FAILURE(rc))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            return rc;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        unsigned iPTE = (GCPtr >> SHW_PT_SHIFT) & SHW_PT_MASK;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        while (iPTE < ELEMENTS(pPT->a))
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (pPT->a[iPTE].n.u1Present)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            {
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                pPT->a[iPTE].u = (pPT->a[iPTE].u & (fMask | SHW_PTE_PG_MASK)) | (fFlags & ~SHW_PTE_PG_MASK);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                Assert(pPT->a[iPTE].n.u1Present);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync                PGM_INVL_PG(GCPtr);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            }
e52f819639386db020b2a635b47a415248c7fbf9vboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            /* next page */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            cb -= PAGE_SIZE;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            if (!cb)
e02db9e0d46f862430895b82b10e8ecde075cf11vboxsync                return VINF_SUCCESS;
680ca45722ec7123029ced4f88dfad87b397ef52vboxsync            GCPtr += PAGE_SIZE;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync            iPTE++;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync        }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    }
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync}
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/**
0e77737b0ba913683e614db11463b31ca67aacbevboxsync * Retrieve shadow PDE
0e77737b0ba913683e614db11463b31ca67aacbevboxsync *
0e77737b0ba913683e614db11463b31ca67aacbevboxsync * @returns VBox status code.
0e77737b0ba913683e614db11463b31ca67aacbevboxsync * @param   pVM         The virtual machine.
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync * @param   iPD         Shadow PDE index.
0e77737b0ba913683e614db11463b31ca67aacbevboxsync * @param   pPde        Where to store the shadow PDE entry.
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync */
e9a217d585085a6a6d129d27ca0d96a1b8e6d0eevboxsyncPGM_SHW_DECL(int, GetPDEByIndex)(PVM pVM, unsigned iPD, PX86PDEPAE pPde)
e9a217d585085a6a6d129d27ca0d96a1b8e6d0eevboxsync{
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync#if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync    /*
e9a217d585085a6a6d129d27ca0d96a1b8e6d0eevboxsync     * Get page directory addresses.
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync     */
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync    Assert(iPD < SHW_TOTAL_PD_ENTRIES);
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync    PX86PDE pPdeSrc = &CTXMID(pVM->pgm.s.p,32BitPD)->a[iPD];
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync# else
e9a217d585085a6a6d129d27ca0d96a1b8e6d0eevboxsync    PX86PDEPAE pPdeSrc = &CTXMID(pVM->pgm.s.ap,PaePDs)[0]->a[iPD];    /* We treat this as a PD with 2048 entries. */
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync# endif
2d53f6e472561965d363674e17f48d3bdffc24d3vboxsync
0e77737b0ba913683e614db11463b31ca67aacbevboxsync    pPde->u = (X86PGPAEUINT)pPdeSrc->u;
0e77737b0ba913683e614db11463b31ca67aacbevboxsync    return VINF_SUCCESS;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    AssertFailed();
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    return VERR_NOT_IMPLEMENTED;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync}
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/**
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync * Set shadow PDE
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @returns VBox status code.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   pVM         The virtual machine.
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync * @param   iPD         Shadow PDE index.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   Pde         Shadow PDE.
e98b0df488a9ec7732b1d5c2e735ce707842e975vboxsync */
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsyncPGM_SHW_DECL(int, SetPDEByIndex)(PVM pVM, unsigned iPD, X86PDEPAE Pde)
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync{
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync#if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    /*
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     * Get page directory addresses and update the specified entry.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync     */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    Assert(iPD < SHW_TOTAL_PD_ENTRIES);
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync# if PGM_SHW_TYPE == PGM_TYPE_32BIT
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync    Assert(Pde.au32[1] == 0); /* First uint32_t is backwards compatible. */
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    Assert(Pde.n.u1Size == 0);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    PX86PDE pPdeDst = &CTXMID(pVM->pgm.s.p,32BitPD)->a[iPD];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    pPdeDst->u = Pde.au32[0];
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# else
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    PX86PDEPAE pPdeDst = &CTXMID(pVM->pgm.s.ap,PaePDs)[0]->a[iPD];  /* We treat this as a PD with 2048 entries. */
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync    pPdeDst->u = Pde.u;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    Assert(pPdeDst->n.u1Present);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    return VINF_SUCCESS;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#else
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync    AssertFailed();
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    return VERR_NOT_IMPLEMENTED;
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync}
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync/**
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * Modify shadow PDE
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @returns VBox status code.
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync * @param   pVM         The virtual machine.
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync * @param   iPD         Shadow PDE index.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync * @param   fFlags      The OR  mask - page flags X86_PDE_*, excluding the page mask of course.
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync * @param   fMask       The AND mask - page flags X86_PDE_*.
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync *                      Be extremely CAREFUL with ~'ing values because they can be 32-bit!
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsync */
223cf005b18af2c21352a70693ebaf0582f68ebcvboxsyncPGM_SHW_DECL(int, ModifyPDEByIndex)(PVM pVM, uint32_t iPD, uint64_t fFlags, uint64_t fMask)
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync{
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync#if PGM_SHW_TYPE == PGM_TYPE_32BIT || PGM_SHW_TYPE == PGM_TYPE_PAE
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    /*
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync     * Get page directory addresses and update the specified entry.
a6936eab59adc5624216e6e5e5e455fc6a40df7fvboxsync     */
e08de24d4792d31b7f2aac29db5cb8840d940009vboxsync    Assert(iPD < SHW_TOTAL_PD_ENTRIES);
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync# if PGM_SHW_TYPE == PGM_TYPE_32BIT
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    PX86PDE pPdeDst = &CTXMID(pVM->pgm.s.p,32BitPD)->a[iPD];
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    pPdeDst->u = ((pPdeDst->u & ((X86PGUINT)fMask | SHW_PDE_PG_MASK)) | ((X86PGUINT)fFlags & ~SHW_PDE_PG_MASK));
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    Assert(!pPdeDst->n.u1Size);
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync# else
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    PX86PDEPAE pPdeDst = &CTXMID(pVM->pgm.s.ap,PaePDs)[0]->a[iPD];      /* We treat this as a PD with 2048 entries. */
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    pPdeDst->u = (pPdeDst->u & (fMask | SHW_PDE_PG_MASK)) | (fFlags & ~SHW_PDE_PG_MASK);
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync# endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    Assert(pPdeDst->n.u1Present);
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    return VINF_SUCCESS;
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync#else
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync    AssertFailed();
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync    return VERR_NOT_IMPLEMENTED;
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync#endif
d408b82da0773c7e8cd4b3a01cb8a065a2c73a2dvboxsync}
d98e61ba075ed7d0b567a5d884bc85d643fe3de7vboxsync