vm_protos.h   [plain text]

/*
 * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifdef  XNU_KERNEL_PRIVATE

#ifndef _VM_VM_PROTOS_H_
#define _VM_VM_PROTOS_H_

#include <mach/mach_types.h>
#include <kern/kern_types.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * This file contains various type definitions and routine prototypes
 * that are needed to avoid compilation warnings for VM code (in osfmk,
 * default_pager and bsd).
 * Most of these should eventually go into more appropriate header files.
 *
 * Include it after all other header files since it doesn't include any
 * type definitions and it works around some conflicts with other header
 * files.
 */

/*
 * iokit
 */
extern kern_return_t device_data_action(
	uintptr_t               device_handle,
	ipc_port_t              device_pager,
	vm_prot_t               protection,
	vm_object_offset_t      offset,
	vm_size_t               size);

extern kern_return_t device_close(
	uintptr_t     device_handle);

extern boolean_t vm_swap_files_pinned(void);

/*
 * osfmk
 */
#ifndef _IPC_IPC_PORT_H_
extern mach_port_name_t ipc_port_copyout_send(
	ipc_port_t      sright,
	ipc_space_t     space);
extern task_t port_name_to_task(
	mach_port_name_t name);
extern task_t port_name_to_task_inspect(
	mach_port_name_t name);
extern void ipc_port_release_send(
	ipc_port_t      port);
#endif /* _IPC_IPC_PORT_H_ */

extern ipc_space_t  get_task_ipcspace(
	task_t t);

#if CONFIG_MEMORYSTATUS
extern int max_task_footprint_mb;       /* Per-task limit on physical memory consumption in megabytes */
#endif /* CONFIG_MEMORYSTATUS */

/* Some loose-ends VM stuff */

extern vm_map_t         kalloc_map;
extern vm_size_t        msg_ool_size_small;
extern vm_map_t         zone_map;

extern void consider_machine_adjust(void);
extern vm_map_offset_t get_map_min(vm_map_t);
extern vm_map_offset_t get_map_max(vm_map_t);
extern vm_map_size_t get_vmmap_size(vm_map_t);
#if CONFIG_COREDUMP
extern int get_vmmap_entries(vm_map_t);
#endif
extern int get_map_nentries(vm_map_t);

extern vm_map_offset_t vm_map_page_mask(vm_map_t);

extern kern_return_t vm_map_purgable_control(
	vm_map_t                map,
	vm_map_offset_t         address,
	vm_purgable_t           control,
	int                     *state);

#if MACH_ASSERT
extern void vm_map_pmap_check_ledgers(
	pmap_t          pmap,
	ledger_t        ledger,
	int             pid,
	char            *procname);
#endif /* MACH_ASSERT */

extern kern_return_t
vnode_pager_get_object_vnode(
	memory_object_t mem_obj,
	uintptr_t * vnodeaddr,
	uint32_t * vid);

#if CONFIG_COREDUMP
extern boolean_t coredumpok(vm_map_t map, vm_offset_t va);
#endif

/*
 * VM routines that used to be published to
 * user space, and are now restricted to the kernel.
 *
 * They should eventually go away entirely -
 * to be replaced with standard vm_map() and
 * vm_deallocate() calls.
 */

extern kern_return_t vm_upl_map
(
	vm_map_t target_task,
	upl_t upl,
	vm_address_t *address
);

extern kern_return_t vm_upl_unmap
(
	vm_map_t target_task,
	upl_t upl
);

extern kern_return_t vm_region_object_create
(
	vm_map_t target_task,
	vm_size_t size,
	ipc_port_t *object_handle
);

extern mach_vm_offset_t mach_get_vm_start(vm_map_t);
extern mach_vm_offset_t mach_get_vm_end(vm_map_t);

#if CONFIG_CODE_DECRYPTION
#define VM_MAP_DEBUG_APPLE_PROTECT      MACH_ASSERT
#if VM_MAP_DEBUG_APPLE_PROTECT
extern int vm_map_debug_apple_protect;
#endif /* VM_MAP_DEBUG_APPLE_PROTECT */
struct pager_crypt_info;
extern kern_return_t vm_map_apple_protected(
	vm_map_t                map,
	vm_map_offset_t         start,
	vm_map_offset_t         end,
	vm_object_offset_t      crypto_backing_offset,
	struct pager_crypt_info *crypt_info);
extern void apple_protect_pager_bootstrap(void);
extern memory_object_t apple_protect_pager_setup(
	vm_object_t             backing_object,
	vm_object_offset_t      backing_offset,
	vm_object_offset_t      crypto_backing_offset,
	struct pager_crypt_info *crypt_info,
	vm_object_offset_t      crypto_start,
	vm_object_offset_t      crypto_end);
#endif  /* CONFIG_CODE_DECRYPTION */

struct vm_shared_region_slide_info;
extern kern_return_t vm_map_shared_region(
	vm_map_t                map,
	vm_map_offset_t         start,
	vm_map_offset_t         end,
	vm_object_offset_t      backing_offset,
	struct vm_shared_region_slide_info *slide_info);
extern void shared_region_pager_bootstrap(void);
extern memory_object_t shared_region_pager_setup(
	vm_object_t             backing_object,
	vm_object_offset_t      backing_offset,
	struct vm_shared_region_slide_info *slide_info);

struct vnode;
extern void swapfile_pager_bootstrap(void);
extern memory_object_t swapfile_pager_setup(struct vnode *vp);
extern memory_object_control_t swapfile_pager_control(memory_object_t mem_obj);

#if __arm64__ || (__ARM_ARCH_7K__ >= 2)
#define SIXTEENK_PAGE_SIZE      0x4000
#define SIXTEENK_PAGE_MASK      0x3FFF
#define SIXTEENK_PAGE_SHIFT     14
#endif /* __arm64__ || (__ARM_ARCH_7K__ >= 2) */

#if __arm64__
#define FOURK_PAGE_SIZE         0x1000
#define FOURK_PAGE_MASK         0xFFF
#define FOURK_PAGE_SHIFT        12

extern unsigned int page_shift_user32;

#define VM_MAP_DEBUG_FOURK      MACH_ASSERT
#if VM_MAP_DEBUG_FOURK
extern int vm_map_debug_fourk;
#endif /* VM_MAP_DEBUG_FOURK */
extern void fourk_pager_bootstrap(void);
extern memory_object_t fourk_pager_create(void);
extern vm_object_t fourk_pager_to_vm_object(memory_object_t mem_obj);
extern kern_return_t fourk_pager_populate(
	memory_object_t mem_obj,
	boolean_t overwrite,
	int index,
	vm_object_t new_backing_object,
	vm_object_offset_t new_backing_offset,
	vm_object_t *old_backing_object,
	vm_object_offset_t *old_backing_offset);
#endif /* __arm64__ */

/*
 * bsd
 */
struct vnode;
extern void *upl_get_internal_page_list(
	upl_t upl);

extern void vnode_setswapmount(struct vnode *);
extern int64_t vnode_getswappin_avail(struct vnode *);

extern void vnode_pager_was_dirtied(
	struct vnode *,
	vm_object_offset_t,
	vm_object_offset_t);

typedef int pager_return_t;
extern pager_return_t   vnode_pagein(
	struct vnode *, upl_t,
	upl_offset_t, vm_object_offset_t,
	upl_size_t, int, int *);
extern pager_return_t   vnode_pageout(
	struct vnode *, upl_t,
	upl_offset_t, vm_object_offset_t,
	upl_size_t, int, int *);
extern uint32_t vnode_trim(struct vnode *, int64_t offset, unsigned long len);
extern memory_object_t vnode_pager_setup(
	struct vnode *, memory_object_t);
extern vm_object_offset_t vnode_pager_get_filesize(
	struct vnode *);
extern uint32_t vnode_pager_isinuse(
	struct vnode *);
extern boolean_t vnode_pager_isSSD(
	struct vnode *);
extern void vnode_pager_throttle(
	void);
extern uint32_t vnode_pager_return_throttle_io_limit(
	struct vnode *,
	uint32_t     *);
extern kern_return_t vnode_pager_get_name(
	struct vnode    *vp,
	char            *pathname,
	vm_size_t       pathname_len,
	char            *filename,
	vm_size_t       filename_len,
	boolean_t       *truncated_path_p);
struct timespec;
extern kern_return_t vnode_pager_get_mtime(
	struct vnode    *vp,
	struct timespec *mtime,
	struct timespec *cs_mtime);
extern kern_return_t vnode_pager_get_cs_blobs(
	struct vnode    *vp,
	void            **blobs);

#if CONFIG_IOSCHED
void vnode_pager_issue_reprioritize_io(
	struct vnode    *devvp,
	uint64_t        blkno,
	uint32_t        len,
	int             priority);
#endif

#if CHECK_CS_VALIDATION_BITMAP
/* used by the vnode_pager_cs_validation_bitmap routine*/
#define CS_BITMAP_SET   1
#define CS_BITMAP_CLEAR 2
#define CS_BITMAP_CHECK 3

#endif /* CHECK_CS_VALIDATION_BITMAP */

extern void vnode_pager_bootstrap(void);
extern kern_return_t
vnode_pager_data_unlock(
	memory_object_t         mem_obj,
	memory_object_offset_t  offset,
	memory_object_size_t            size,
	vm_prot_t               desired_access);
extern kern_return_t vnode_pager_init(
	memory_object_t,
	memory_object_control_t,
	memory_object_cluster_size_t);
extern kern_return_t vnode_pager_get_object_size(
	memory_object_t,
	memory_object_offset_t *);

#if CONFIG_IOSCHED
extern kern_return_t vnode_pager_get_object_devvp(
	memory_object_t,
	uintptr_t *);
#endif

extern void vnode_pager_dirtied(
	memory_object_t,
	vm_object_offset_t,
	vm_object_offset_t);
extern kern_return_t vnode_pager_get_isinuse(
	memory_object_t,
	uint32_t *);
extern kern_return_t vnode_pager_get_isSSD(
	memory_object_t,
	boolean_t *);
extern kern_return_t vnode_pager_get_throttle_io_limit(
	memory_object_t,
	uint32_t *);
extern kern_return_t vnode_pager_get_object_name(
	memory_object_t mem_obj,
	char            *pathname,
	vm_size_t       pathname_len,
	char            *filename,
	vm_size_t       filename_len,
	boolean_t       *truncated_path_p);
extern kern_return_t vnode_pager_get_object_mtime(
	memory_object_t mem_obj,
	struct timespec *mtime,
	struct timespec *cs_mtime);

#if CHECK_CS_VALIDATION_BITMAP
extern kern_return_t vnode_pager_cs_check_validation_bitmap(
	memory_object_t mem_obj,
	memory_object_offset_t  offset,
	int             optype);
#endif /*CHECK_CS_VALIDATION_BITMAP*/

extern  kern_return_t ubc_cs_check_validation_bitmap(
	struct vnode *vp,
	memory_object_offset_t offset,
	int optype);

extern kern_return_t vnode_pager_data_request(
	memory_object_t,
	memory_object_offset_t,
	memory_object_cluster_size_t,
	vm_prot_t,
	memory_object_fault_info_t);
extern kern_return_t vnode_pager_data_return(
	memory_object_t,
	memory_object_offset_t,
	memory_object_cluster_size_t,
	memory_object_offset_t *,
	int *,
	boolean_t,
	boolean_t,
	int);
extern kern_return_t vnode_pager_data_initialize(
	memory_object_t,
	memory_object_offset_t,
	memory_object_cluster_size_t);
extern void vnode_pager_reference(
	memory_object_t         mem_obj);
extern kern_return_t vnode_pager_synchronize(
	memory_object_t         mem_obj,
	memory_object_offset_t  offset,
	memory_object_size_t            length,
	vm_sync_t               sync_flags);
extern kern_return_t vnode_pager_map(
	memory_object_t         mem_obj,
	vm_prot_t               prot);
extern kern_return_t vnode_pager_last_unmap(
	memory_object_t         mem_obj);
extern void vnode_pager_deallocate(
	memory_object_t);
extern kern_return_t vnode_pager_terminate(
	memory_object_t);
extern void vnode_pager_vrele(
	struct vnode *vp);
extern struct vnode *vnode_pager_lookup_vnode(
	memory_object_t);

extern int  ubc_map(
	struct vnode *vp,
	int flags);
extern void ubc_unmap(
	struct vnode *vp);

struct vm_map_entry;
extern struct vm_object *find_vnode_object(struct vm_map_entry *entry);

extern void   device_pager_reference(memory_object_t);
extern void   device_pager_deallocate(memory_object_t);
extern kern_return_t   device_pager_init(memory_object_t,
    memory_object_control_t,
    memory_object_cluster_size_t);
extern  kern_return_t device_pager_terminate(memory_object_t);
extern  kern_return_t   device_pager_data_request(memory_object_t,
    memory_object_offset_t,
    memory_object_cluster_size_t,
    vm_prot_t,
    memory_object_fault_info_t);
extern kern_return_t device_pager_data_return(memory_object_t,
    memory_object_offset_t,
    memory_object_cluster_size_t,
    memory_object_offset_t *,
    int *,
    boolean_t,
    boolean_t,
    int);
extern kern_return_t device_pager_data_initialize(memory_object_t,
    memory_object_offset_t,
    memory_object_cluster_size_t);
extern kern_return_t device_pager_data_unlock(memory_object_t,
    memory_object_offset_t,
    memory_object_size_t,
    vm_prot_t);
extern kern_return_t device_pager_synchronize(memory_object_t,
    memory_object_offset_t,
    memory_object_size_t,
    vm_sync_t);
extern kern_return_t device_pager_map(memory_object_t, vm_prot_t);
extern kern_return_t device_pager_last_unmap(memory_object_t);
extern kern_return_t device_pager_populate_object(
	memory_object_t         device,
	memory_object_offset_t  offset,
	ppnum_t                 page_num,
	vm_size_t               size);
extern memory_object_t device_pager_setup(
	memory_object_t,
	uintptr_t,
	vm_size_t,
	int);
extern void device_pager_bootstrap(void);
extern boolean_t is_device_pager_ops(const struct memory_object_pager_ops *pager_ops);

extern kern_return_t pager_map_to_phys_contiguous(
	memory_object_control_t object,
	memory_object_offset_t  offset,
	addr64_t                base_vaddr,
	vm_size_t               size);

extern kern_return_t memory_object_create_named(
	memory_object_t pager,
	memory_object_offset_t  size,
	memory_object_control_t         *control);

struct macx_triggers_args;
extern int mach_macx_triggers(
	struct macx_triggers_args       *args);

extern int macx_swapinfo(
	memory_object_size_t    *total_p,
	memory_object_size_t    *avail_p,
	vm_size_t               *pagesize_p,
	boolean_t               *encrypted_p);

extern void log_stack_execution_failure(addr64_t vaddr, vm_prot_t prot);
extern void log_unnest_badness(
	vm_map_t map,
	vm_map_offset_t start_unnest,
	vm_map_offset_t end_unnest,
	boolean_t is_nested_map,
	vm_map_offset_t lowest_unnestable_addr);

struct proc;
struct proc *current_proc(void);
extern int cs_allow_invalid(struct proc *p);
extern int cs_invalid_page(addr64_t vaddr, boolean_t *cs_killed);

#define CS_VALIDATE_TAINTED     0x00000001
#define CS_VALIDATE_NX          0x00000002
extern boolean_t cs_validate_range(struct vnode *vp,
    memory_object_t pager,
    memory_object_offset_t offset,
    const void *data,
    vm_size_t size,
    unsigned *result);
#if PMAP_CS
extern kern_return_t cs_associate_blob_with_mapping(
	void *pmap,
	vm_map_offset_t start,
	vm_map_size_t size,
	vm_object_offset_t offset,
	void *blobs_p);
#endif /* PMAP_CS */

extern kern_return_t memory_entry_purgeable_control_internal(
	ipc_port_t      entry_port,
	vm_purgable_t   control,
	int             *state);

extern kern_return_t memory_entry_access_tracking_internal(
	ipc_port_t      entry_port,
	int             *access_tracking,
	uint32_t        *access_tracking_reads,
	uint32_t        *access_tracking_writes);

extern kern_return_t mach_memory_entry_purgable_control(
	ipc_port_t      entry_port,
	vm_purgable_t   control,
	int             *state);

extern kern_return_t mach_memory_entry_get_page_counts(
	ipc_port_t      entry_port,
	unsigned int    *resident_page_count,
	unsigned int    *dirty_page_count);

extern kern_return_t mach_memory_entry_page_op(
	ipc_port_t              entry_port,
	vm_object_offset_t      offset,
	int                     ops,
	ppnum_t                 *phys_entry,
	int                     *flags);

extern kern_return_t mach_memory_entry_range_op(
	ipc_port_t              entry_port,
	vm_object_offset_t      offset_beg,
	vm_object_offset_t      offset_end,
	int                     ops,
	int                     *range);

extern void mach_memory_entry_port_release(ipc_port_t port);
extern void mach_destroy_memory_entry(ipc_port_t port);
extern kern_return_t mach_memory_entry_allocate(
	struct vm_named_entry **user_entry_p,
	ipc_port_t *user_handle_p);

extern void vm_paging_map_init(void);

extern int macx_backing_store_compaction(int flags);
extern unsigned int mach_vm_ctl_page_free_wanted(void);

extern int no_paging_space_action(void);

#define VM_TOGGLE_CLEAR         0
#define VM_TOGGLE_SET           1
#define VM_TOGGLE_GETVALUE      999
int vm_toggle_entry_reuse(int, int*);

#define SWAP_WRITE              0x00000000      /* Write buffer (pseudo flag). */
#define SWAP_READ               0x00000001      /* Read buffer. */
#define SWAP_ASYNC              0x00000002      /* Start I/O, do not wait. */

extern void vm_compressor_pager_init(void);
extern kern_return_t compressor_memory_object_create(
	memory_object_size_t,
	memory_object_t *);

extern boolean_t vm_compressor_low_on_space(void);
extern boolean_t vm_compressor_out_of_space(void);
extern int       vm_swap_low_on_space(void);
void             do_fastwake_warmup_all(void);
#if CONFIG_JETSAM
extern int proc_get_memstat_priority(struct proc*, boolean_t);
#endif /* CONFIG_JETSAM */

/* the object purger. purges the next eligible object from memory. */
/* returns TRUE if an object was purged, otherwise FALSE. */
boolean_t vm_purgeable_object_purge_one_unlocked(int force_purge_below_group);
void vm_purgeable_nonvolatile_owner_update(task_t       owner,
    int          delta);
void vm_purgeable_volatile_owner_update(task_t          owner,
    int             delta);
void vm_owned_objects_disown(task_t task);


struct trim_list {
	uint64_t        tl_offset;
	uint64_t        tl_length;
	struct trim_list *tl_next;
};

u_int32_t vnode_trim_list(struct vnode *vp, struct trim_list *tl, boolean_t route_only);

#define MAX_SWAPFILENAME_LEN    1024
#define SWAPFILENAME_INDEX_LEN  2       /* Doesn't include the terminating NULL character */

extern char     swapfilename[MAX_SWAPFILENAME_LEN + 1];

struct vm_counters {
	unsigned int    do_collapse_compressor;
	unsigned int    do_collapse_compressor_pages;
	unsigned int    do_collapse_terminate;
	unsigned int    do_collapse_terminate_failure;
	unsigned int    should_cow_but_wired;
	unsigned int    create_upl_extra_cow;
	unsigned int    create_upl_extra_cow_pages;
	unsigned int    create_upl_lookup_failure_write;
	unsigned int    create_upl_lookup_failure_copy;
};
extern struct vm_counters vm_counters;

#if CONFIG_SECLUDED_MEMORY
struct vm_page_secluded_data {
	int     eligible_for_secluded;
	int     grab_success_free;
	int     grab_success_other;
	int     grab_failure_locked;
	int     grab_failure_state;
	int     grab_failure_dirty;
	int     grab_for_iokit;
	int     grab_for_iokit_success;
};
extern struct vm_page_secluded_data vm_page_secluded;

extern int num_tasks_can_use_secluded_mem;

/* boot-args */
extern int secluded_for_apps;
extern int secluded_for_iokit;
extern int secluded_for_filecache;
#if 11
extern int secluded_for_fbdp;
#endif

extern uint64_t vm_page_secluded_drain(void);
extern void             memory_object_mark_eligible_for_secluded(
	memory_object_control_t         control,
	boolean_t                       eligible_for_secluded);

#endif /* CONFIG_SECLUDED_MEMORY */

#define MAX_PAGE_RANGE_QUERY    (1ULL * 1024 * 1024 * 1024) /* 1 GB */

extern kern_return_t mach_make_memory_entry_internal(
	vm_map_t                target_map,
	memory_object_size_t    *size,
	memory_object_offset_t offset,
	vm_prot_t               permission,
	vm_named_entry_kernel_flags_t vmne_kflags,
	ipc_port_t              *object_handle,
	ipc_port_t              parent_handle);

#define roundup(x, y)   ((((x) % (y)) == 0) ? \
	                (x) : ((x) + ((y) - ((x) % (y)))))

#ifdef __cplusplus
}
#endif

/*
 * Flags for the VM swapper/reclaimer.
 * Used by vm_swap_consider_defragment()
 * to force defrag/reclaim by the swap
 * GC thread.
 */
#define VM_SWAP_FLAGS_NONE             0
#define VM_SWAP_FLAGS_FORCE_DEFRAG     1
#define VM_SWAP_FLAGS_FORCE_RECLAIM    2

#if __arm64__
/*
 * Flags to control the behavior of
 * the legacy footprint entitlement.
 */
#define LEGACY_FOOTPRINT_ENTITLEMENT_IGNORE             (1)
#define LEGACY_FOOTPRINT_ENTITLEMENT_IOS11_ACCT         (2)
#define LEGACY_FOOTPRINT_ENTITLEMENT_LIMIT_INCREASE     (3)

#endif /* __arm64__ */

#endif  /* _VM_VM_PROTOS_H_ */

#endif  /* XNU_KERNEL_PRIVATE */