gmm.h revision 6e05e71a0af04e0b368d892860bb28d2becc9c07
/** @file
* GMM - The Global Memory Manager. (VMM)
*/
/*
* Copyright (C) 2007 Sun Microsystems, Inc.
*
* 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
#ifndef ___VBox_gmm_h
#define ___VBox_gmm_h
#include <VBox/types.h>
#include <VBox/gvmm.h>
#include <VBox/sup.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_gmm GMM - The Global Memory Manager
* @{
*/
/** @def IN_GMM_R0
* Used to indicate whether we're inside the same link module as the ring 0
* part of the Global Memory Manager or not.
*/
#ifdef DOXYGEN_RUNNING
# define IN_GMM_R0
#endif
/** @def GMMR0DECL
* Ring 0 GMM export or import declaration.
* @param type The return type of the function declaration.
*/
#ifdef IN_GMM_R0
# define GMMR0DECL(type) DECLEXPORT(type) VBOXCALL
#else
# define GMMR0DECL(type) DECLIMPORT(type) VBOXCALL
#endif
/** @def IN_GMM_R3
* Used to indicate whether we're inside the same link module as the ring 3
* part of the Global Memory Manager or not.
*/
#ifdef DOXYGEN_RUNNING
# define IN_GMM_R3
#endif
/** @def GMMR3DECL
* Ring 3 GMM export or import declaration.
* @param type The return type of the function declaration.
*/
#ifdef IN_GMM_R3
# define GMMR3DECL(type) DECLEXPORT(type) VBOXCALL
#else
# define GMMR3DECL(type) DECLIMPORT(type) VBOXCALL
#endif
/** The chunk shift. (2^21 = 2 MB) */
#define GMM_CHUNK_SHIFT 21
/** The allocation chunk size. */
#define GMM_CHUNK_SIZE (1U << GMM_CHUNK_SHIFT)
/** The allocation chunk size in pages. */
#define GMM_CHUNK_NUM_PAGES (1U << (GMM_CHUNK_SHIFT - PAGE_SHIFT))
/** The shift factor for converting a page id into a chunk id. */
#define GMM_CHUNKID_SHIFT (GMM_CHUNK_SHIFT - PAGE_SHIFT)
/** The last valid Chunk ID value. */
#define GMM_CHUNKID_LAST (GMM_PAGEID_LAST >> GMM_CHUNKID_SHIFT)
/** The last valid Page ID value.
* The current limit is 2^28 - 1, or almost 1TB if you like.
* The constraints are currently dictated by PGMPAGE. */
#define GMM_PAGEID_LAST (RT_BIT_32(28) - 1)
/** Mask out the page index from the Page ID. */
#define GMM_PAGEID_IDX_MASK ((1U << GMM_CHUNKID_SHIFT) - 1)
/** The NIL Chunk ID value. */
#define NIL_GMM_CHUNKID 0
/** The NIL Page ID value. */
#define NIL_GMM_PAGEID 0
#if 0 /* wrong - these are guest page pfns and not page ids! */
/** Special Page ID used by unassigned pages. */
#define GMM_PAGEID_UNASSIGNED 0x0fffffffU
/** Special Page ID used by unsharable pages.
* Like MMIO2, shadow and heap. This is for later, obviously. */
#define GMM_PAGEID_UNSHARABLE 0x0ffffffeU
/** The end of the valid Page IDs. This is the first special one. */
#define GMM_PAGEID_END 0x0ffffff0U
#endif
/** @def GMM_GCPHYS_LAST
* The last of the valid guest physical address as it applies to GMM pages.
*
* This must reflect the constraints imposed by the RTGCPHYS type and
* the guest page frame number used internally in GMMPAGE.
*
* @note Note this corresponds to GMM_PAGE_PFN_LAST. */
#if HC_ARCH_BITS == 64
# define GMM_GCPHYS_LAST UINT64_C(0x00000fffffff0000) /* 2^44 (16TB) - 0x10000 */
#else
# define GMM_GCPHYS_LAST UINT64_C(0x0000000fffff0000) /* 2^36 (64GB) - 0x10000 */
#endif
/**
* Over-commitment policy.
*/
typedef enum GMMOCPOLICY
{
/** The usual invalid 0 value. */
GMMOCPOLICY_INVALID = 0,
/** No over-commitment, fully backed.
* The GMM guarantees that it will be able to allocate all of the
* guest RAM for a VM with OC policy. */
GMMOCPOLICY_NO_OC,
/** to-be-determined. */
GMMOCPOLICY_TBD,
/** The end of the valid policy range. */
GMMOCPOLICY_END,
/** The usual 32-bit hack. */
GMMOCPOLICY_32BIT_HACK = 0x7fffffff
} GMMOCPOLICY;
/**
* VM / Memory priority.
*/
typedef enum GMMPRIORITY
{
/** The usual invalid 0 value. */
GMMPRIORITY_INVALID = 0,
/** High.
* When ballooning, ask these VMs last.
* When running out of memory, try not to interrupt these VMs. */
GMMPRIORITY_HIGH,
/** Normal.
* When ballooning, don't wait to ask these.
* When running out of memory, pause, save and/or kill these VMs. */
GMMPRIORITY_NORMAL,
/** Low.
* When ballooning, maximize these first.
* When running out of memory, save or kill these VMs. */
GMMPRIORITY_LOW,
/** The end of the valid priority range. */
GMMPRIORITY_END,
/** The custom 32-bit type blowup. */
GMMPRIORITY_32BIT_HACK = 0x7fffffff
} GMMPRIORITY;
/**
* GMM Memory Accounts.
*/
typedef enum GMMACCOUNT
{
/** The customary invalid zero entry. */
GMMACCOUNT_INVALID = 0,
/** Account with the base allocations. */
GMMACCOUNT_BASE,
/** Account with the shadow allocations. */
GMMACCOUNT_SHADOW,
/** Account with the fixed allocations. */
GMMACCOUNT_FIXED,
/** The end of the valid values. */
GMMACCOUNT_END,
/** The usual 32-bit value to finish it off. */
GMMACCOUNT_32BIT_HACK = 0x7fffffff
} GMMACCOUNT;
/**
* Balloon actions.
*/
typedef enum
{
/** Invalid zero entry. */
GMMBALLOONACTION_INVALID = 0,
/** Inflate the balloon. */
GMMBALLOONACTION_INFLATE,
/** Deflate the balloon. */
GMMBALLOONACTION_DEFLATE,
/** Puncture the balloon because of VM reset. */
GMMBALLOONACTION_RESET,
/** End of the valid actions. */
GMMBALLOONACTION_END,
/** hack forcing the size of the enum to 32-bits. */
GMMBALLOONACTION_MAKE_32BIT_HACK = 0x7fffffff
} GMMBALLOONACTION;
/**
* A page descriptor for use when freeing pages.
* See GMMR0FreePages, GMMR0BalloonedPages.
*/
typedef struct GMMFREEPAGEDESC
{
/** The Page ID of the page to be freed. */
uint32_t idPage;
} GMMFREEPAGEDESC;
/** Pointer to a page descriptor for freeing pages. */
typedef GMMFREEPAGEDESC *PGMMFREEPAGEDESC;
/**
* A page descriptor for use when updating and allocating pages.
*
* This is a bit complicated because we want to do as much as possible
* with the same structure.
*/
typedef struct GMMPAGEDESC
{
/** The physical address of the page.
*
* @input GMMR0AllocateHandyPages expects the guest physical address
* to update the GMMPAGE structure with. Pass GMM_GCPHYS_UNSHAREABLE
* when appropriate and NIL_RTHCPHYS when the page wasn't used
* for any specific guest address.
*
* GMMR0AllocatePage expects the guest physical address to put in
* the GMMPAGE structure for the page it allocates for this entry.
* Pass NIL_RTHCPHYS and GMM_GCPHYS_UNSHAREABLE as above.
*
* @output The host physical address of the allocated page.
* NIL_RTHCPHYS on allocation failure.
*
* ASSUMES: sizeof(RTHCPHYS) >= sizeof(RTGCPHYS).
*/
RTHCPHYS HCPhysGCPhys;
/** The Page ID.
*
* @intput GMMR0AllocateHandyPages expects the Page ID of the page to
* update here. NIL_GMM_PAGEID means no page should be updated.
*
* GMMR0AllocatePages requires this to be initialized to
* NIL_GMM_PAGEID currently.
*
* @output The ID of the page, NIL_GMM_PAGEID if the allocation failed.
*/
uint32_t idPage;
/** The Page ID of the shared page was replaced by this page.
*
* @input GMMR0AllocateHandyPages expects this to indicate a shared
* page that has been replaced by this page and should have its
* reference counter decremented and perhaps be freed up. Use
* NIL_GMM_PAGEID if no shared page was involved.
*
* All other APIs expects NIL_GMM_PAGEID here.
*
* @output All APIs sets this to NIL_GMM_PAGEID.
*/
uint32_t idSharedPage;
} GMMPAGEDESC;
AssertCompileSize(GMMPAGEDESC, 16);
/** Pointer to a page allocation. */
typedef GMMPAGEDESC *PGMMPAGEDESC;
/** GMMPAGEDESC::HCPhysGCPhys value that indicates that the page is unsharable.
* @note This corresponds to GMM_PAGE_PFN_UNSHAREABLE. */
#if HC_ARCH_BITS == 64
# define GMM_GCPHYS_UNSHAREABLE UINT64_C(0x00000fffffff1000)
#else
# define GMM_GCPHYS_UNSHAREABLE UINT64_C(0x0000000fffff1000)
#endif
GMMR0DECL(int) GMMR0Init(void);
GMMR0DECL(void) GMMR0Term(void);
GMMR0DECL(void) GMMR0InitPerVMData(PGVM pGVM);
GMMR0DECL(void) GMMR0CleanupVM(PGVM pGVM);
GMMR0DECL(int) GMMR0InitialReservation(PVM pVM, VMCPUID idCpu, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages,
GMMOCPOLICY enmPolicy, GMMPRIORITY enmPriority);
GMMR0DECL(int) GMMR0UpdateReservation(PVM pVM, VMCPUID idCpu, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages);
GMMR0DECL(int) GMMR0AllocateHandyPages(PVM pVM, VMCPUID idCpu, uint32_t cPagesToUpdate, uint32_t cPagesToAlloc, PGMMPAGEDESC paPages);
GMMR0DECL(int) GMMR0AllocatePages(PVM pVM, VMCPUID idCpu, uint32_t cPages, PGMMPAGEDESC paPages, GMMACCOUNT enmAccount);
GMMR0DECL(int) GMMR0AllocateLargePage(PVM pVM, VMCPUID idCpu, uint32_t cbPage, uint32_t *pIdPage, RTHCPHYS *pHCPhys);
GMMR0DECL(int) GMMR0FreePages(PVM pVM, VMCPUID idCpu, uint32_t cPages, PGMMFREEPAGEDESC paPages, GMMACCOUNT enmAccount);
GMMR0DECL(int) GMMR0FreeLargePage(PVM pVM, VMCPUID idCpu, uint32_t idPage);
GMMR0DECL(int) GMMR0BalloonedPages(PVM pVM, VMCPUID idCpu, GMMBALLOONACTION enmAction, uint32_t cBalloonedPages);
GMMR0DECL(int) GMMR0MapUnmapChunk(PVM pVM, VMCPUID idCpu, uint32_t idChunkMap, uint32_t idChunkUnmap, PRTR3PTR ppvR3);
GMMR0DECL(int) GMMR0SeedChunk(PVM pVM, VMCPUID idCpu, RTR3PTR pvR3);
/**
* Request buffer for GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION.
* @see GMMR0InitialReservation
*/
typedef struct GMMINITIALRESERVATIONREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
uint64_t cBasePages; /**< @see GMMR0InitialReservation */
uint32_t cShadowPages; /**< @see GMMR0InitialReservation */
uint32_t cFixedPages; /**< @see GMMR0InitialReservation */
GMMOCPOLICY enmPolicy; /**< @see GMMR0InitialReservation */
GMMPRIORITY enmPriority; /**< @see GMMR0InitialReservation */
} GMMINITIALRESERVATIONREQ;
/** Pointer to a GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION request buffer. */
typedef GMMINITIALRESERVATIONREQ *PGMMINITIALRESERVATIONREQ;
GMMR0DECL(int) GMMR0InitialReservationReq(PVM pVM, VMCPUID idCpu, PGMMINITIALRESERVATIONREQ pReq);
/**
* Request buffer for GMMR0UpdateReservationReq / VMMR0_DO_GMM_UPDATE_RESERVATION.
* @see GMMR0UpdateReservation
*/
typedef struct GMMUPDATERESERVATIONREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
uint64_t cBasePages; /**< @see GMMR0UpdateReservation */
uint32_t cShadowPages; /**< @see GMMR0UpdateReservation */
uint32_t cFixedPages; /**< @see GMMR0UpdateReservation */
} GMMUPDATERESERVATIONREQ;
/** Pointer to a GMMR0InitialReservationReq / VMMR0_DO_GMM_INITIAL_RESERVATION request buffer. */
typedef GMMUPDATERESERVATIONREQ *PGMMUPDATERESERVATIONREQ;
GMMR0DECL(int) GMMR0UpdateReservationReq(PVM pVM, VMCPUID idCpu, PGMMUPDATERESERVATIONREQ pReq);
/**
* Request buffer for GMMR0AllocatePagesReq / VMMR0_DO_GMM_ALLOCATE_PAGES.
* @see GMMR0AllocatePages.
*/
typedef struct GMMALLOCATEPAGESREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The account to charge the allocation to. */
GMMACCOUNT enmAccount;
/** The number of pages to allocate. */
uint32_t cPages;
/** Array of page descriptors. */
GMMPAGEDESC aPages[1];
} GMMALLOCATEPAGESREQ;
/** Pointer to a GMMR0AllocatePagesReq / VMMR0_DO_GMM_ALLOCATE_PAGES request buffer. */
typedef GMMALLOCATEPAGESREQ *PGMMALLOCATEPAGESREQ;
GMMR0DECL(int) GMMR0AllocatePagesReq(PVM pVM, VMCPUID idCpu, PGMMALLOCATEPAGESREQ pReq);
/**
* Request buffer for GMMR0FreePagesReq / VMMR0_DO_GMM_FREE_PAGES.
* @see GMMR0FreePages.
*/
typedef struct GMMFREEPAGESREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The account this relates to. */
GMMACCOUNT enmAccount;
/** The number of pages to free. */
uint32_t cPages;
/** Array of free page descriptors. */
GMMFREEPAGEDESC aPages[1];
} GMMFREEPAGESREQ;
/** Pointer to a GMMR0FreePagesReq / VMMR0_DO_GMM_FREE_PAGES request buffer. */
typedef GMMFREEPAGESREQ *PGMMFREEPAGESREQ;
GMMR0DECL(int) GMMR0FreePagesReq(PVM pVM, VMCPUID idCpu, PGMMFREEPAGESREQ pReq);
/**
* Request buffer for GMMR0BalloonedPagesReq / VMMR0_DO_GMM_BALLOONED_PAGES.
* @see GMMR0BalloonedPages.
*/
typedef struct GMMBALLOONEDPAGESREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The number of ballooned pages. */
uint32_t cBalloonedPages;
/** Inflate or deflate the balloon. */
GMMBALLOONACTION enmAction;
} GMMBALLOONEDPAGESREQ;
/** Pointer to a GMMR0BalloonedPagesReq / VMMR0_DO_GMM_BALLOONED_PAGES request buffer. */
typedef GMMBALLOONEDPAGESREQ *PGMMBALLOONEDPAGESREQ;
GMMR0DECL(int) GMMR0BalloonedPagesReq(PVM pVM, VMCPUID idCpu, PGMMBALLOONEDPAGESREQ pReq);
/**
* Request buffer for GMMR0QueryTotalFreePagesReq / VMMR0_DO_GMM_QUERY_TOTAL_FREE_PAGES.
* @see GMMR0QueryTotalFreePagesReq.
*/
typedef struct GMMFREEQUERYREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The number of free pages (out). */
uint64_t cFreePages;
} GMMFREEQUERYREQ;
/** Pointer to a GMMR0QueryTotalFreePagesReq / VMMR0_DO_GMM_QUERY_TOTAL_FREE_PAGES request buffer. */
typedef GMMFREEQUERYREQ *PGMMFREEQUERYREQ;
GMMR0DECL(int) GMMR0QueryTotalFreePagesReq(PVM pVM, PGMMFREEQUERYREQ pReq);
/**
* Request buffer for GMMR0MapUnmapChunkReq / VMMR0_DO_GMM_MAP_UNMAP_CHUNK.
* @see GMMR0MapUnmapChunk
*/
typedef struct GMMMAPUNMAPCHUNKREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The chunk to map, NIL_GMM_CHUNKID if unmap only. (IN) */
uint32_t idChunkMap;
/** The chunk to unmap, NIL_GMM_CHUNKID if map only. (IN) */
uint32_t idChunkUnmap;
/** Where the mapping address is returned. (OUT) */
RTR3PTR pvR3;
} GMMMAPUNMAPCHUNKREQ;
/** Pointer to a GMMR0MapUnmapChunkReq / VMMR0_DO_GMM_MAP_UNMAP_CHUNK request buffer. */
typedef GMMMAPUNMAPCHUNKREQ *PGMMMAPUNMAPCHUNKREQ;
GMMR0DECL(int) GMMR0MapUnmapChunkReq(PVM pVM, VMCPUID idCpu, PGMMMAPUNMAPCHUNKREQ pReq);
/**
* Request buffer for GMMR0FreeLargePageReq / VMMR0_DO_GMM_FREE_LARGE_PAGE.
* @see GMMR0FreeLargePage.
*/
typedef struct GMMFREELARGEPAGEREQ
{
/** The header. */
SUPVMMR0REQHDR Hdr;
/** The Page ID. */
uint32_t idPage;
} GMMFREELARGEPAGEREQ;
/** Pointer to a GMMR0FreePagesReq / VMMR0_DO_GMM_FREE_PAGES request buffer. */
typedef GMMFREELARGEPAGEREQ *PGMMFREELARGEPAGEREQ;
GMMR0DECL(int) GMMR0FreeLargePageReq(PVM pVM, VMCPUID idCpu, PGMMFREELARGEPAGEREQ pReq);
#ifdef IN_RING3
/** @defgroup grp_gmm_r3 The Global Memory Manager Ring-3 API Wrappers
* @ingroup grp_gmm
* @{
*/
GMMR3DECL(int) GMMR3InitialReservation(PVM pVM, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages,
GMMOCPOLICY enmPolicy, GMMPRIORITY enmPriority);
GMMR3DECL(int) GMMR3UpdateReservation(PVM pVM, uint64_t cBasePages, uint32_t cShadowPages, uint32_t cFixedPages);
GMMR3DECL(int) GMMR3AllocatePagesPrepare(PVM pVM, PGMMALLOCATEPAGESREQ *ppReq, uint32_t cPages, GMMACCOUNT enmAccount);
GMMR3DECL(int) GMMR3AllocatePagesPerform(PVM pVM, PGMMALLOCATEPAGESREQ pReq);
GMMR3DECL(void) GMMR3AllocatePagesCleanup(PGMMALLOCATEPAGESREQ pReq);
GMMR3DECL(int) GMMR3FreePagesPrepare(PVM pVM, PGMMFREEPAGESREQ *ppReq, uint32_t cPages, GMMACCOUNT enmAccount);
GMMR3DECL(void) GMMR3FreePagesRePrep(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t cPages, GMMACCOUNT enmAccount);
GMMR3DECL(int) GMMR3FreePagesPerform(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t cActualPages);
GMMR3DECL(void) GMMR3FreePagesCleanup(PGMMFREEPAGESREQ pReq);
GMMR3DECL(void) GMMR3FreeAllocatedPages(PVM pVM, GMMALLOCATEPAGESREQ const *pAllocReq);
GMMR3DECL(int) GMMR3AllocateLargePage(PVM pVM, uint32_t cbPage);
GMMR3DECL(int) GMMR3FreeLargePage(PVM pVM, uint32_t idPage);
GMMR3DECL(int) GMMR3MapUnmapChunk(PVM pVM, uint32_t idChunkMap, uint32_t idChunkUnmap, PRTR3PTR ppvR3);
GMMR3DECL(int) GMMR3SeedChunk(PVM pVM, RTR3PTR pvR3);
GMMR3DECL(int) GMMR3BalloonedPages(PVM pVM, GMMBALLOONACTION enmAction, uint32_t cBalloonedPages);
GMMR3DECL(int) GMMR3QueryTotalFreePages(PVM pVM, uint64_t *pcTotalFreePages);
/** @} */
#endif /* IN_RING3 */
/** @} */
RT_C_DECLS_END
#endif