GMMR0Internal.h revision a448d0dfcede5c742c35e4aee5f9848a4a61bf18
/* $Id$ */
/** @file
* GMM - The Global Memory Manager, Internal Header.
*/
/*
* Copyright (C) 2007 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef ___GMMR0Internal_h
#define ___GMMR0Internal_h
#include <VBox/vmm/gmm.h>
#include <iprt/avl.h>
/**
* The allocation sizes.
*/
typedef struct GMMVMSIZES
{
/** The number of pages of base memory.
* This is the sum of RAM, ROMs and handy pages. */
uint64_t cBasePages;
/** The number of pages for the shadow pool. (Can be squeezed for memory.) */
uint32_t cShadowPages;
/** The number of pages for fixed allocations like MMIO2 and the hyper heap. */
uint32_t cFixedPages;
} GMMVMSIZES;
/** Pointer to a GMMVMSIZES. */
typedef GMMVMSIZES *PGMMVMSIZES;
/**
* Shared module registration info (per VM)
*/
typedef struct GMMSHAREDMODULEPERVM
{
/** Tree node. */
AVLGCPTRNODECORE Core;
/** Pointer to global shared module info. */
PGMMSHAREDMODULE pGlobalModule;
/** Set if another VM registered a different shared module at the same base address. */
bool fCollision;
/** Alignment. */
bool bAlignment[3];
/** Number of included region descriptors */
uint32_t cRegions;
/** Shared region descriptor(s). */
GMMSHAREDREGIONDESC aRegions[1];
} GMMSHAREDMODULEPERVM;
/** Pointer to a GMMSHAREDMODULEPERVM. */
typedef GMMSHAREDMODULEPERVM *PGMMSHAREDMODULEPERVM;
/** Pointer to a GMM allocation chunk. */
typedef struct GMMCHUNK *PGMMCHUNK;
/** The GMMCHUNK::cFree shift count employed by gmmR0SelectFreeSetList. */
#define GMM_CHUNK_FREE_SET_SHIFT 4
/** Index of the list containing completely unused chunks.
* The code ASSUMES this is the last list. */
#define GMM_CHUNK_FREE_SET_UNUSED_LIST (GMM_CHUNK_NUM_PAGES >> GMM_CHUNK_FREE_SET_SHIFT)
/**
* A set of free chunks.
*/
typedef struct GMMCHUNKFREESET
{
/** The number of free pages in the set. */
uint64_t cFreePages;
/** The generation ID for the set. This is incremented whenever
* something is linked or unlinked from this set. */
uint64_t idGeneration;
/** Chunks ordered by increasing number of free pages.
* In the final list the chunks are completely unused. */
PGMMCHUNK apLists[GMM_CHUNK_FREE_SET_UNUSED_LIST + 1];
} GMMCHUNKFREESET;
/**
* The per-VM GMM data.
*/
typedef struct GMMPERVM
{
/** Free set for use in bound mode. */
GMMCHUNKFREESET Private;
/** The reservations. */
GMMVMSIZES Reserved;
/** The actual allocations.
* This includes both private and shared page allocations. */
GMMVMSIZES Allocated;
/** The current number of private pages. */
uint64_t cPrivatePages;
/** The current number of shared pages. */
uint64_t cSharedPages;
/** The current over-commitment policy. */
GMMOCPOLICY enmPolicy;
/** The VM priority for arbitrating VMs in low and out of memory situation.
* Like which VMs to start squeezing first. */
GMMPRIORITY enmPriority;
/** The current number of ballooned pages. */
uint64_t cBalloonedPages;
/** The max number of pages that can be ballooned. */
uint64_t cMaxBalloonedPages;
/** The number of pages we've currently requested the guest to give us.
* This is 0 if no pages currently requested. */
uint64_t cReqBalloonedPages;
/** The number of pages the guest has given us in response to the request.
* This is not reset on request completed and may be used in later decisions. */
uint64_t cReqActuallyBalloonedPages;
/** The number of pages we've currently requested the guest to take back. */
uint64_t cReqDeflatePages;
/** Shared module tree (per-vm). */
PAVLGCPTRNODECORE pSharedModuleTree;
/** Whether ballooning is enabled or not. */
bool fBallooningEnabled;
/** Whether shared paging is enabled or not. */
bool fSharedPagingEnabled;
/** Whether the VM is allowed to allocate memory or not.
* This is used when the reservation update request fails or when the VM has
* been told to suspend/save/die in an out-of-memory case. */
bool fMayAllocate;
} GMMPERVM;
/** Pointer to the per-VM GMM data. */
typedef GMMPERVM *PGMMPERVM;
#endif