| 1 | /* $Id: GMMR0Internal.h 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * GMM - The Global Memory Manager, Internal Header.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2007-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 | #ifndef VMM_INCLUDED_SRC_VMMR0_GMMR0Internal_h
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| 29 | #define VMM_INCLUDED_SRC_VMMR0_GMMR0Internal_h
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| 30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 31 | # pragma once
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| 32 | #endif
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| 33 |
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| 34 | #include <VBox/vmm/gmm.h>
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| 35 | #include <iprt/avl.h>
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| 36 |
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| 37 |
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| 38 | /**
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| 39 | * Shared module registration info (per VM)
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| 40 | */
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| 41 | typedef struct GMMSHAREDMODULEPERVM
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| 42 | {
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| 43 | /** Tree node. */
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| 44 | AVLGCPTRNODECORE Core;
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| 45 | /** Pointer to global shared module info. */
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| 46 | PGMMSHAREDMODULE pGlobalModule;
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| 47 | /** Pointer to the region addresses.
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| 48 | *
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| 49 | * They can differe between VMs because of address space scrambling or
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| 50 | * simply different loading order. */
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| 51 | RTGCPTR64 aRegionsGCPtrs[1];
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| 52 | } GMMSHAREDMODULEPERVM;
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| 53 | /** Pointer to a GMMSHAREDMODULEPERVM. */
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| 54 | typedef GMMSHAREDMODULEPERVM *PGMMSHAREDMODULEPERVM;
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| 55 |
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| 56 |
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| 57 | /** Pointer to a GMM allocation chunk. */
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| 58 | typedef struct GMMCHUNK *PGMMCHUNK;
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| 59 |
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| 60 |
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| 61 | /** The GMMCHUNK::cFree shift count employed by gmmR0SelectFreeSetList. */
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| 62 | #define GMM_CHUNK_FREE_SET_SHIFT 4
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| 63 | /** Index of the list containing completely unused chunks.
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| 64 | * The code ASSUMES this is the last list. */
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| 65 | #define GMM_CHUNK_FREE_SET_UNUSED_LIST (GMM_CHUNK_NUM_PAGES >> GMM_CHUNK_FREE_SET_SHIFT)
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| 66 |
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| 67 | /**
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| 68 | * A set of free chunks.
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| 69 | */
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| 70 | typedef struct GMMCHUNKFREESET
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| 71 | {
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| 72 | /** The number of free pages in the set. */
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| 73 | uint64_t cFreePages;
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| 74 | /** The generation ID for the set. This is incremented whenever
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| 75 | * something is linked or unlinked from this set. */
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| 76 | uint64_t idGeneration;
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| 77 | /** Chunks ordered by increasing number of free pages.
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| 78 | * In the final list the chunks are completely unused. */
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| 79 | PGMMCHUNK apLists[GMM_CHUNK_FREE_SET_UNUSED_LIST + 1];
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| 80 | } GMMCHUNKFREESET;
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| 81 |
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| 82 |
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| 83 | /**
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| 84 | * A per-VM allocation chunk lookup TLB entry (for GMMR0PageIdToVirt).
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| 85 | */
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| 86 | typedef struct GMMPERVMCHUNKTLBE
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| 87 | {
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| 88 | /** The GMM::idFreeGeneration value this is valid for. */
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| 89 | uint64_t idGeneration;
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| 90 | /** The chunk. */
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| 91 | PGMMCHUNK pChunk;
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| 92 | } GMMPERVMCHUNKTLBE;
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| 93 | /** Poitner to a per-VM allocation chunk TLB entry. */
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| 94 | typedef GMMPERVMCHUNKTLBE *PGMMPERVMCHUNKTLBE;
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| 95 |
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| 96 | /** The number of entries in the allocation chunk lookup TLB. */
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| 97 | #define GMMPERVM_CHUNKTLB_ENTRIES 32
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| 98 | /** Gets the TLB entry index for the given Chunk ID. */
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| 99 | #define GMMPERVM_CHUNKTLB_IDX(a_idChunk) ( (a_idChunk) & (GMMPERVM_CHUNKTLB_ENTRIES - 1) )
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| 100 |
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| 101 |
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| 102 | /**
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| 103 | * The per-VM GMM data.
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| 104 | */
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| 105 | typedef struct GMMPERVM
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| 106 | {
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| 107 | /** Free set for use in bound mode. */
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| 108 | GMMCHUNKFREESET Private;
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| 109 | /** The VM statistics. */
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| 110 | GMMVMSTATS Stats;
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| 111 | /** Shared module tree (per-vm). */
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| 112 | PAVLGCPTRNODECORE pSharedModuleTree;
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| 113 | /** Hints at the last chunk we allocated some memory from. */
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| 114 | uint32_t idLastChunkHint;
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| 115 | uint32_t u32Padding;
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| 116 |
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| 117 | /** Spinlock protecting the chunk lookup TLB. */
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| 118 | RTSPINLOCK hChunkTlbSpinLock;
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| 119 | /** The chunk lookup TLB used by GMMR0PageIdToVirt. */
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| 120 | GMMPERVMCHUNKTLBE aChunkTlbEntries[GMMPERVM_CHUNKTLB_ENTRIES];
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| 121 | } GMMPERVM;
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| 122 | /** Pointer to the per-VM GMM data. */
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| 123 | typedef GMMPERVM *PGMMPERVM;
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| 124 |
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| 125 | #endif /* !VMM_INCLUDED_SRC_VMMR0_GMMR0Internal_h */
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| 126 |
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