| 1 | /** @file
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| 2 | * GMM - The Global Memory Manager.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2007 innotek GmbH
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef ___VBox_gmm_h
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| 27 | #define ___VBox_gmm_h
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| 28 |
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| 29 | #include <VBox/types.h>
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| 30 | #include <VBox/gvmm.h>
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| 31 | #include <VBox/sup.h>
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| 32 |
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| 33 | __BEGIN_DECLS
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| 34 |
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| 35 | /** @defgroup grp_gmm GMM - The Global Memory Manager
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| 36 | * @{
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| 37 | */
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| 38 |
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| 39 | /** @def IN_GMM_R0
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| 40 | * Used to indicate whether we're inside the same link module as the ring 0
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| 41 | * part of the Global Memory Manager or not.
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| 42 | */
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| 43 | /** @def GMMR0DECL
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| 44 | * Ring 0 GMM export or import declaration.
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| 45 | * @param type The return type of the function declaration.
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| 46 | */
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| 47 | #ifdef IN_GMM_R0
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| 48 | # define GMMR0DECL(type) DECLEXPORT(type) VBOXCALL
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| 49 | #else
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| 50 | # define GMMR0DECL(type) DECLIMPORT(type) VBOXCALL
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| 51 | #endif
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| 52 |
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| 53 |
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| 54 | /** The chunk shift. (2^20 = 1 MB) */
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| 55 | #define GMM_CHUNK_SHIFT 20
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| 56 | /** The allocation chunk size. */
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| 57 | #define GMM_CHUNK_SIZE (1U << GMM_CHUNK_SHIFT)
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| 58 | /** The allocation chunk size in pages. */
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| 59 | #define GMM_CHUNK_NUM_PAGES (1U << (GMM_CHUNK_SHIFT - PAGE_SHIFT))
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| 60 | /** The shift factor for converting a page id into a chunk id. */
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| 61 | #define GMM_CHUNKID_SHIFT (GMM_CHUNK_SHIFT - PAGE_SHIFT)
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| 62 | /** The last valid Chunk ID value. */
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| 63 | #define GMM_CHUNKID_LAST (GMM_PAGEID_LAST >> GMM_CHUNKID_SHIFT)
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| 64 | /** The last valid Page ID value.
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| 65 | * The current limit is 2^28 - 1, or almost 1TB if you like.
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| 66 | * The constraints are currently dictated by PGMPAGE. */
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| 67 | #define GMM_PAGEID_LAST (RT_BIT_32(28) - 1)
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| 68 | /** Mask out the page index from the Page ID. */
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| 69 | #define GMM_PAGEID_IDX_MASK ((1U << GMM_CHUNKID_SHIFT) - 1)
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| 70 | /** The NIL Chunk ID value. */
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| 71 | #define NIL_GMM_CHUNKID 0
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| 72 | /** The NIL Page ID value. */
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| 73 | #define NIL_GMM_PAGEID 0
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| 74 |
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| 75 | #if 0 /* wrong - these are guest page pfns and not page ids! */
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| 76 | /** Special Page ID used by unassigned pages. */
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| 77 | #define GMM_PAGEID_UNASSIGNED 0x0fffffffU
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| 78 | /** Special Page ID used by unsharable pages.
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| 79 | * Like MMIO2, shadow and heap. This is for later, obviously. */
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| 80 | #define GMM_PAGEID_UNSHARABLE 0x0ffffffeU
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| 81 | /** The end of the valid Page IDs. This is the first special one. */
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| 82 | #define GMM_PAGEID_END 0x0ffffff0U
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| 83 | #endif
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| 84 |
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| 85 |
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| 86 | /**
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| 87 | * Over-commitment policy.
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| 88 | */
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| 89 | typedef enum GMMOCPOLICY
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| 90 | {
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| 91 | /** The usual invalid 0 value. */
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| 92 | GMMOCPOLICY_INVALID = 0,
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| 93 | /** No over-commitment, fully backed.
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| 94 | * The GMM guarantees that it will be able to allocate all of the
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| 95 | * guest RAM for a VM with OC policy. */
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| 96 | GMMOCPOLICY_NO_OC,
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| 97 | /** to-be-determined. */
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| 98 | GMMOCPOLICY_TBD,
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| 99 | /** The end of the valid policy range. */
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| 100 | GMMOCPOLICY_END,
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| 101 | /** The usual 32-bit hack. */
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| 102 | GMMOCPOLICY_32BIT_HACK = 0x7fffffff
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| 103 | } GMMOCPOLICY;
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| 104 |
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| 105 | /**
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| 106 | * VM / Memory priority.
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| 107 | */
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| 108 | typedef enum GMMPRIORITY
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| 109 | {
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| 110 | /** The usual invalid 0 value. */
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| 111 | GMMPRIORITY_INVALID = 0,
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| 112 | /** High.
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| 113 | * When ballooning, ask these VMs last.
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| 114 | * When running out of memory, try not to interrupt these VMs. */
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| 115 | GMMPRIORITY_HIGH,
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| 116 | /** Normal.
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| 117 | * When ballooning, don't wait to ask these.
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| 118 | * When running out of memory, pause, save and/or kill these VMs. */
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| 119 | GMMPRIORITY_NORMAL,
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| 120 | /** Low.
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| 121 | * When ballooning, maximize these first.
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| 122 | * When running out of memory, save or kill these VMs. */
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| 123 | GMMPRIORITY_LOW,
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| 124 | /** The end of the valid priority range. */
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| 125 | GMMPRIORITY_END = 0,
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| 126 | /** The custom 32-bit type blowup. */
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| 127 | GMMPRIORITY_32BIT_HACK = 0x7fffffff
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| 128 | } GMMPRIORITY;
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| 129 |
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| 130 |
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| 131 | /**
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| 132 | * GMM Memory Accounts.
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| 133 | */
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| 134 | typedef enum GMMACCOUNT
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| 135 | {
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| 136 | /** The customary invalid zero entry. */
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| 137 | GMMACCOUNT_INVALID = 0,
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| 138 | /** Account with the base allocations. */
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| 139 | GMMACCOUNT_BASE,
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| 140 | /** Account with the shadow allocations. */
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| 141 | GMMACCOUNT_SHADOW,
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| 142 | /** Account with the fixed allocations. */
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| 143 | GMMACCOUNT_FIXED,
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| 144 | /** The end of the valid values. */
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| 145 | GMMACCOUNT_END,
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| 146 | /** The usual 32-bit value to finish it off. */
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| 147 | GMMACCOUNT_32BIT_HACK = 0x7fffffff
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| 148 | } GMMACCOUNT;
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| 149 |
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| 150 |
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| 151 | /**
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| 152 | * A page descriptor for use when freeing pages.
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| 153 | * See GMMR0FreePages, GMMR0BalloonedPages.
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| 154 | */
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| 155 | typedef struct GMMFREEPAGEDESC
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| 156 | {
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| 157 | /** The Page ID of the page to be freed. */
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| 158 | uint32_t idPage;
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| 159 | } GMMFREEPAGEDESC;
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| 160 | /** Pointer to a page descriptor for freeing pages. */
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| 161 | typedef GMMFREEPAGEDESC *PGMMFREEPAGEDESC;
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| 162 |
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| 163 |
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| 164 | /**
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| 165 | * A page descriptor for use when updating and allocating pages.
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| 166 | *
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| 167 | * This is a bit complicated because we want to do as much as possible
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| 168 | * with the same structure.
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| 169 | */
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| 170 | typedef struct GMMPAGEDESC
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| 171 | {
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| 172 | /** The physical address of the page.
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| 173 | *
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| 174 | * @input GMMR0AllocateHandyPages expects the guest physical address
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| 175 | * to update the GMMPAGE structure with. Pass GMM_GCPHYS_UNSHAREABLE
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| 176 | * when appropriate and NIL_RTHCPHYS when the page wasn't used
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| 177 | * for any specific guest address.
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| 178 | *
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| 179 | * GMMR0AllocatePage expects the guest physical address to put in
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| 180 | * the GMMPAGE structure for the page it allocates for this entry.
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| 181 | * Pass NIL_RTHCPHYS and GMM_GCPHYS_UNSHAREABLE as above.
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| 182 | *
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| 183 | * @output The host physical address of the allocated page.
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| 184 | * NIL_RTHCPHYS on allocation failure.
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| 185 | *
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| 186 | * ASSUMES: sizeof(RTHCPHYS) >= sizeof(RTGCPHYS).
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| 187 | */
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| 188 | RTHCPHYS HCPhysGCPhys;
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| 189 |
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| 190 | /** The Page ID.
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| 191 | *
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| 192 | * @intput GMMR0AllocateHandyPages expects the Page ID of the page to
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| 193 | * update here. NIL_GMM_PAGEID means no page should be updated.
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| 194 | *
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| 195 | * GMMR0AllocatePages requires this to be initialized to
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| 196 | * NIL_GMM_PAGEID currently.
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| 197 | *
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| 198 | * @output The ID of the page, NIL_GMM_PAGEID if the allocation failed.
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| 199 | */
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| 200 | uint32_t idPage;
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| 201 |
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| 202 | /** The Page ID of the shared page was replaced by this page.
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| 203 | *
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| 204 | * @input GMMR0AllocateHandyPages expects this to indicate a shared
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| 205 | * page that has been replaced by this page and should have its
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| 206 | * reference counter decremented and perhaps be freed up. Use
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| 207 | * NIL_GMM_PAGEID if no shared page was involved.
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| 208 | *
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| 209 | * All other APIs expects NIL_GMM_PAGEID here.
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| 210 | *
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| 211 | * @output All APIs sets this to NIL_GMM_PAGEID.
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| 212 | */
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| 213 | uint32_t idSharedPage;
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| 214 | } GMMPAGEDESC;
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| 215 | AssertCompileSize(GMMPAGEDESC, 16);
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| 216 | /** Pointer to a page allocation. */
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| 217 | typedef GMMPAGEDESC *PGMMPAGEDESC;
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| 218 |
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| 219 | /** GMMPAGEDESC::HCPhysGCPhys value that indicates that the page is shared. */
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| 220 | #define GMM_GCPHYS_UNSHAREABLE (RTHCPHYS)(0xfffffff0)
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| 221 |
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| 222 | GMMR0DECL(int) GMMR0Init(void);
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| 223 | GMMR0DECL(void) GMMR0Term(void);
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| 224 | GMMR0DECL(void) GMMR0InitPerVMData(PGVM pGVM);
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| 225 | GMMR0DECL(void) GMMR0CleanupVM(PGVM pGVM);
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| 226 | GMMR0DECL(int) GMMR0InitialReservation(PVM pVM, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages,
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| 227 | GMMOCPOLICY enmPolicy, GMMPRIORITY enmPriority);
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| 228 | GMMR0DECL(int) GMMR0UpdateReservation(PVM pVM, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages);
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| 229 | GMMR0DECL(int) GMMR0AllocateHandyPages(PVM pVM, uint32_t cPagesToUpdate, uint32_t cPagesToAlloc, PGMMPAGEDESC paPages);
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| 230 | GMMR0DECL(int) GMMR0AllocatePages(PVM pVM, uint32_t cPages, PGMMPAGEDESC paPages, GMMACCOUNT enmAccount);
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| 231 | GMMR0DECL(int) GMMR0FreePages(PVM pVM, uint32_t cPages, PGMMFREEPAGEDESC paPages, GMMACCOUNT enmAccount);
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| 232 | GMMR0DECL(int) GMMR0BalloonedPages(PVM pVM, uint32_t cBalloonedPages, uint32_t cPagesToFree, PGMMFREEPAGEDESC paPages, bool fCompleted);
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| 233 | GMMR0DECL(int) GMMR0DeflatedBalloon(PVM pVM, uint32_t cPages);
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| 234 | GMMR0DECL(int) GMMR0MapUnmapChunk(PVM pVM, uint32_t idChunkMap, uint32_t idChunkUnmap, PRTR3PTR ppvR3);
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| 235 | GMMR0DECL(int) GMMR0SeedChunk(PVM pVM, RTR3PTR pvR3);
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| 236 |
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| 237 |
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| 238 | /**
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| 239 | * Request buffer for GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION.
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| 240 | * @see GMMR0InitialReservation
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| 241 | */
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| 242 | typedef struct GMMINITIALRESERVATIONREQ
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| 243 | {
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| 244 | /** The header. */
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| 245 | SUPVMMR0REQHDR Hdr;
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| 246 | uint64_t cBasePages; /**< @see GMMR0InitialReservation */
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| 247 | uint32_t cShadowPages; /**< @see GMMR0InitialReservation */
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| 248 | uint32_t cFixedPages; /**< @see GMMR0InitialReservation */
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| 249 | GMMOCPOLICY enmPolicy; /**< @see GMMR0InitialReservation */
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| 250 | GMMPRIORITY enmPriority; /**< @see GMMR0InitialReservation */
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| 251 | } GMMINITIALRESERVATIONREQ;
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| 252 | /** Pointer to a GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION request buffer. */
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| 253 | typedef GMMINITIALRESERVATIONREQ *PGMMINITIALRESERVATIONREQ;
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| 254 |
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| 255 | GMMR0DECL(int) GMMR0InitialReservationReq(PVM pVM, PGMMINITIALRESERVATIONREQ pReq);
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| 256 |
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| 257 |
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| 258 | /**
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| 259 | * Request buffer for GMMR0UpdateReservationReq / VMMR0_DO_GMM_UPDATE_RESERVATION.
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| 260 | * @see GMMR0UpdateReservation
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| 261 | */
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| 262 | typedef struct GMMUPDATERESERVATIONREQ
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| 263 | {
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| 264 | /** The header. */
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| 265 | SUPVMMR0REQHDR Hdr;
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| 266 | uint64_t cBasePages; /**< @see GMMR0UpdateReservation */
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| 267 | uint32_t cShadowPages; /**< @see GMMR0UpdateReservation */
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| 268 | uint32_t cFixedPages; /**< @see GMMR0UpdateReservation */
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| 269 | } GMMUPDATERESERVATIONREQ;
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| 270 | /** Pointer to a GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION request buffer. */
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| 271 | typedef GMMUPDATERESERVATIONREQ *PGMMUPDATERESERVATIONREQ;
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| 272 |
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| 273 | GMMR0DECL(int) GMMR0UpdateReservationReq(PVM pVM, PGMMUPDATERESERVATIONREQ pReq);
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| 274 |
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| 275 |
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| 276 | /**
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| 277 | * Request buffer for GMMR0AllocatePagesReq / VMMR0_DO_GMM_ALLOCATE_PAGES.
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| 278 | * @see GMMR0AllocatePages.
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| 279 | */
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| 280 | typedef struct GMMALLOCATEPAGESREQ
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| 281 | {
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| 282 | /** The header. */
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| 283 | SUPVMMR0REQHDR Hdr;
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| 284 | /** The account to charge the allocation to. */
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| 285 | GMMACCOUNT enmAccount;
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| 286 | /** The number of pages to allocate. */
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| 287 | uint32_t cPages;
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| 288 | /** Array of page descriptors. */
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| 289 | GMMPAGEDESC aPages[1];
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| 290 | } GMMALLOCATEPAGESREQ;
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| 291 | /** Pointer to a GMMR0AllocatePagesReq / VMMR0_DO_GMM_ALLOCATE_PAGES request buffer. */
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| 292 | typedef GMMALLOCATEPAGESREQ *PGMMALLOCATEPAGESREQ;
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| 293 |
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| 294 | GMMR0DECL(int) GMMR0AllocatePagesReq(PVM pVM, PGMMALLOCATEPAGESREQ pReq);
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| 295 |
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| 296 |
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| 297 | /**
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| 298 | * Request buffer for GMMR0FreePagesReq / VMMR0_DO_GMM_FREE_PAGES.
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| 299 | * @see GMMR0FreePages.
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| 300 | */
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| 301 | typedef struct GMMFREEPAGESREQ
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| 302 | {
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| 303 | /** The header. */
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| 304 | SUPVMMR0REQHDR Hdr;
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| 305 | /** The account this relates to. */
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| 306 | GMMACCOUNT enmAccount;
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| 307 | /** The number of pages to free. */
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| 308 | uint32_t cPages;
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| 309 | /** Array of free page descriptors. */
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| 310 | GMMFREEPAGEDESC aPages[1];
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| 311 | } GMMFREEPAGESREQ;
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| 312 | /** Pointer to a GMMR0FreePagesReq / VMMR0_DO_GMM_FREE_PAGES request buffer. */
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| 313 | typedef GMMFREEPAGESREQ *PGMMFREEPAGESREQ;
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| 314 |
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| 315 | GMMR0DECL(int) GMMR0FreePagesReq(PVM pVM, PGMMFREEPAGESREQ pReq);
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| 316 |
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| 317 |
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| 318 | /**
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| 319 | * Request buffer for GMMR0BalloonedPagesReq / VMMR0_DO_GMM_BALLOONED_PAGES.
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| 320 | * @see GMMR0BalloonedPages.
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| 321 | */
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| 322 | typedef struct GMMBALLOONEDPAGESREQ
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| 323 | {
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| 324 | /** The header. */
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| 325 | SUPVMMR0REQHDR Hdr;
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| 326 | /** The number of ballooned pages. */
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| 327 | uint32_t cBalloonedPages;
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| 328 | /** The number of pages to free. */
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| 329 | uint32_t cPagesToFree;
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| 330 | /** Whether the ballooning request is completed or more pages are still to come. */
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| 331 | bool fCompleted;
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| 332 | /** Array of free page descriptors. */
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| 333 | GMMFREEPAGEDESC aPages[1];
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| 334 | } GMMBALLOONEDPAGESREQ;
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| 335 | /** Pointer to a GMMR0BalloonedPagesReq / VMMR0_DO_GMM_BALLOONED_PAGES request buffer. */
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| 336 | typedef GMMBALLOONEDPAGESREQ *PGMMBALLOONEDPAGESREQ;
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| 337 |
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| 338 | GMMR0DECL(int) GMMR0BalloonedPagesReq(PVM pVM, PGMMBALLOONEDPAGESREQ pReq);
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| 339 |
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| 340 |
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| 341 | /**
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| 342 | * Request buffer for GMMR0MapUnmapChunkReq / VMMR0_DO_GMM_MAP_UNMAP_CHUNK.
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| 343 | * @see GMMR0MapUnmapChunk
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| 344 | */
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| 345 | typedef struct GMMMAPUNMAPCHUNKREQ
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| 346 | {
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| 347 | /** The header. */
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| 348 | SUPVMMR0REQHDR Hdr;
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| 349 | /** The chunk to map, UINT32_MAX if unmap only. (IN) */
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| 350 | uint32_t idChunkMap;
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| 351 | /** The chunk to unmap, UINT32_MAX if map only. (IN) */
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| 352 | uint32_t idChunkUnmap;
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| 353 | /** Where the mapping address is returned. (OUT) */
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| 354 | RTR3PTR pvR3;
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| 355 | } GMMMAPUNMAPCHUNKREQ;
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| 356 | /** Pointer to a GMMR0MapUnmapChunkReq / VMMR0_DO_GMM_MAP_UNMAP_CHUNK request buffer. */
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| 357 | typedef GMMMAPUNMAPCHUNKREQ *PGMMMAPUNMAPCHUNKREQ;
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| 358 |
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| 359 | GMMR0DECL(int) GMMR0MapUnmapChunkReq(PVM pVM, PGMMMAPUNMAPCHUNKREQ pReq);
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| 360 |
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| 361 |
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| 362 | /** @} */
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| 363 |
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| 364 | __END_DECLS
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| 365 |
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| 366 | #endif
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| 367 |
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