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);
#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);

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


/*
 * 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 *);

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 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 void vnode_pager_release_from_cache(
	int	*);
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;
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);

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 int	 vm_swap_low_on_space(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_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

/*
 * "secluded_aging_policy" controls the aging of secluded pages:
 *
 * SECLUDED_AGING_FIFO
 * When a page eligible for the secluded queue is activated or
 * deactivated, it is inserted in the secluded queue.
 * When it get pushed out of the secluded queue, it gets freed.
 *
 * SECLUDED_AGING_ALONG_ACTIVE
 * When a page eligible for the secluded queue is activated, it is
 * inserted in the secluded queue.
 * When it gets pushed out of the secluded queue, its "referenced" bit
 * is reset and it is inserted in the inactive queue.
 *
 * SECLUDED_AGING_AFTER_INACTIVE
 * A page eligible for the secluded queue first makes its way through the
 * active and inactive queues.
 * When it is pushed out of the inactive queue without being re-activated,
 * it is inserted in the secluded queue instead of being reclaimed.
 * When it is pushed out of the secluded queue, it is either freed if it
 * hasn't been re-referenced, or re-activated if it has been re-referenced.
 *
 * SECLUDED_AGING_BEFORE_ACTIVE
 * A page eligible for the secluded queue will first make its way through
 * the secluded queue.  When it gets pushed out of the secluded queue (by
 * new secluded pages), it goes back to the normal aging path, through the
 * active queue and then the inactive queue.
 */
extern int secluded_aging_policy;
#define SECLUDED_AGING_FIFO		0
#define SECLUDED_AGING_ALONG_ACTIVE	1
#define SECLUDED_AGING_AFTER_INACTIVE	2
#define SECLUDED_AGING_BEFORE_ACTIVE	3

extern void 		memory_object_mark_eligible_for_secluded(
	memory_object_control_t		control,
	boolean_t			eligible_for_secluded);

#endif /* CONFIG_SECLUDED_MEMORY */

#ifdef __cplusplus
}
#endif

#endif	/* _VM_VM_PROTOS_H_ */

#endif	/* XNU_KERNEL_PRIVATE */