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/* $Id: GMMR0Internal.h $ */
/** @file
* GMM - The Global Memory Manager, Internal Header.
*/
/*
* Copyright (C) 2007-2023 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_VMMR0_GMMR0Internal_h
#define VMM_INCLUDED_SRC_VMMR0_GMMR0Internal_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/vmm/gmm.h>
#include <iprt/avl.h>
/**
* Shared module registration info (per VM)
*/
typedef struct GMMSHAREDMODULEPERVM
{
/** Tree node. */
AVLGCPTRNODECORE Core;
/** Pointer to global shared module info. */
PGMMSHAREDMODULE pGlobalModule;
/** Pointer to the region addresses.
*
* They can differe between VMs because of address space scrambling or
* simply different loading order. */
RTGCPTR64 aRegionsGCPtrs[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;
/**
* A per-VM allocation chunk lookup TLB entry (for GMMR0PageIdToVirt).
*/
typedef struct GMMPERVMCHUNKTLBE
{
/** The GMM::idFreeGeneration value this is valid for. */
uint64_t idGeneration;
/** The chunk. */
PGMMCHUNK pChunk;
} GMMPERVMCHUNKTLBE;
/** Poitner to a per-VM allocation chunk TLB entry. */
typedef GMMPERVMCHUNKTLBE *PGMMPERVMCHUNKTLBE;
/** The number of entries in the allocation chunk lookup TLB. */
#define GMMPERVM_CHUNKTLB_ENTRIES 32
/** Gets the TLB entry index for the given Chunk ID. */
#define GMMPERVM_CHUNKTLB_IDX(a_idChunk) ( (a_idChunk) & (GMMPERVM_CHUNKTLB_ENTRIES - 1) )
/**
* The per-VM GMM data.
*/
typedef struct GMMPERVM
{
/** Free set for use in bound mode. */
GMMCHUNKFREESET Private;
/** The VM statistics. */
GMMVMSTATS Stats;
/** Shared module tree (per-vm). */
PAVLGCPTRNODECORE pSharedModuleTree;
/** Hints at the last chunk we allocated some memory from. */
uint32_t idLastChunkHint;
uint32_t u32Padding;
/** Spinlock protecting the chunk lookup TLB. */
RTSPINLOCK hChunkTlbSpinLock;
/** The chunk lookup TLB used by GMMR0PageIdToVirt. */
GMMPERVMCHUNKTLBE aChunkTlbEntries[GMMPERVM_CHUNKTLB_ENTRIES];
} GMMPERVM;
/** Pointer to the per-VM GMM data. */
typedef GMMPERVM *PGMMPERVM;
#endif /* !VMM_INCLUDED_SRC_VMMR0_GMMR0Internal_h */
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