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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@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * File: vm/vm_page.h * Author: Avadis Tevanian, Jr., Michael Wayne Young * Date: 1985 * * Resident memory system definitions. */ #ifndef _VM_VM_PAGE_H_ #define _VM_VM_PAGE_H_ #include <debug.h> #include <vm/vm_options.h> #include <vm/vm_protos.h> #include <mach/boolean.h> #include <mach/vm_prot.h> #include <mach/vm_param.h> #include <mach/memory_object_types.h> /* for VMP_CS_BITS... */ #if defined(__LP64__) /* * in order to make the size of a vm_page_t 64 bytes (cache line size for both arm64 and x86_64) * we'll keep the next_m pointer packed... as long as the kernel virtual space where we allocate * vm_page_t's from doesn't span more then 256 Gbytes, we're safe. There are live tests in the * vm_page_t array allocation and the zone init code to determine if we can safely pack and unpack * pointers from the 2 ends of these spaces */ typedef uint32_t vm_page_packed_t; struct vm_page_packed_queue_entry { vm_page_packed_t next; /* next element */ vm_page_packed_t prev; /* previous element */ }; typedef struct vm_page_packed_queue_entry *vm_page_queue_t; typedef struct vm_page_packed_queue_entry vm_page_queue_head_t; typedef struct vm_page_packed_queue_entry vm_page_queue_chain_t; typedef struct vm_page_packed_queue_entry *vm_page_queue_entry_t; typedef vm_page_packed_t vm_page_object_t; #else // __LP64__ /* * we can't do the packing trick on 32 bit architectures * so just turn the macros into noops. */ typedef struct vm_page *vm_page_packed_t; #define vm_page_queue_t queue_t #define vm_page_queue_head_t queue_head_t #define vm_page_queue_chain_t queue_chain_t #define vm_page_queue_entry_t queue_entry_t #define vm_page_object_t vm_object_t #endif // __LP64__ #include <vm/vm_object.h> #include <kern/queue.h> #include <kern/locks.h> #include <kern/macro_help.h> #include <libkern/OSAtomic.h> #define VM_PAGE_COMPRESSOR_COUNT (compressor_object->resident_page_count) /* * Management of resident (logical) pages. * * A small structure is kept for each resident * page, indexed by page number. Each structure * is an element of several lists: * * A hash table bucket used to quickly * perform object/offset lookups * * A list of all pages for a given object, * so they can be quickly deactivated at * time of deallocation. * * An ordered list of pages due for pageout. * * In addition, the structure contains the object * and offset to which this page belongs (for pageout), * and sundry status bits. * * Fields in this structure are locked either by the lock on the * object that the page belongs to (O) or by the lock on the page * queues (P). [Some fields require that both locks be held to * change that field; holding either lock is sufficient to read.] */ #define VM_PAGE_NULL ((vm_page_t) 0) extern char vm_page_inactive_states[]; extern char vm_page_pageable_states[]; extern char vm_page_non_speculative_pageable_states[]; extern char vm_page_active_or_inactive_states[]; #define VM_PAGE_INACTIVE(m) (vm_page_inactive_states[m->vmp_q_state]) #define VM_PAGE_PAGEABLE(m) (vm_page_pageable_states[m->vmp_q_state]) #define VM_PAGE_NON_SPECULATIVE_PAGEABLE(m) (vm_page_non_speculative_pageable_states[m->vmp_q_state]) #define VM_PAGE_ACTIVE_OR_INACTIVE(m) (vm_page_active_or_inactive_states[m->vmp_q_state]) #define VM_PAGE_NOT_ON_Q 0 /* page is not present on any queue, nor is it wired... mainly a transient state */ #define VM_PAGE_IS_WIRED 1 /* page is currently wired */ #define VM_PAGE_USED_BY_COMPRESSOR 2 /* page is in use by the compressor to hold compressed data */ #define VM_PAGE_ON_FREE_Q 3 /* page is on the main free queue */ #define VM_PAGE_ON_FREE_LOCAL_Q 4 /* page is on one of the per-CPU free queues */ #define VM_PAGE_ON_FREE_LOPAGE_Q 5 /* page is on the lopage pool free list */ #define VM_PAGE_ON_THROTTLED_Q 6 /* page is on the throttled queue... we stash anonymous pages here when not paging */ #define VM_PAGE_ON_PAGEOUT_Q 7 /* page is on one of the pageout queues (internal/external) awaiting processing */ #define VM_PAGE_ON_SPECULATIVE_Q 8 /* page is on one of the speculative queues */ #define VM_PAGE_ON_ACTIVE_LOCAL_Q 9 /* page has recently been created and is being held in one of the per-CPU local queues */ #define VM_PAGE_ON_ACTIVE_Q 10 /* page is in global active queue */ #define VM_PAGE_ON_INACTIVE_INTERNAL_Q 11 /* page is on the inactive internal queue a.k.a. anonymous queue */ #define VM_PAGE_ON_INACTIVE_EXTERNAL_Q 12 /* page in on the inactive external queue a.k.a. file backed queue */ #define VM_PAGE_ON_INACTIVE_CLEANED_Q 13 /* page has been cleaned to a backing file and is ready to be stolen */ #define VM_PAGE_ON_SECLUDED_Q 14 /* page is on secluded queue */ #define VM_PAGE_Q_STATE_LAST_VALID_VALUE 14 /* we currently use 4 bits for the state... don't let this go beyond 15 */ #define VM_PAGE_Q_STATE_ARRAY_SIZE (VM_PAGE_Q_STATE_LAST_VALID_VALUE+1) /* * The structure itself. See the block comment above for what (O) and (P) mean. */ #define vmp_pageq vmp_q_un.vmp_q_pageq #define vmp_snext vmp_q_un.vmp_q_snext struct vm_page { union { vm_page_queue_chain_t vmp_q_pageq; /* queue info for FIFO queue or free list (P) */ struct vm_page *vmp_q_snext; } vmp_q_un; vm_page_queue_chain_t vmp_listq; /* all pages in same object (O) */ vm_page_queue_chain_t vmp_specialq; /* anonymous pages in the special queues (P) */ vm_object_offset_t vmp_offset; /* offset into that object (O,P) */ vm_page_object_t vmp_object; /* which object am I in (O&P) */ /* * The following word of flags used to be protected by the "page queues" lock. * That's no longer true and what lock, if any, is needed may depend on the * value of vmp_q_state. * * We use 'vmp_wire_count' to store the local queue id if local queues are enabled. * See the comments at 'vm_page_queues_remove' as to why this is safe to do. */ #define VM_PAGE_SPECIAL_Q_EMPTY (0) #define VM_PAGE_SPECIAL_Q_BG (1) #define VM_PAGE_SPECIAL_Q_DONATE (2) #define VM_PAGE_SPECIAL_Q_FG (3) #define vmp_local_id vmp_wire_count unsigned int vmp_wire_count:16, /* how many wired down maps use me? (O&P) */ vmp_q_state:4, /* which q is the page on (P) */ vmp_on_specialq:2, vmp_gobbled:1, /* page used internally (P) */ vmp_laundry:1, /* page is being cleaned now (P)*/ vmp_no_cache:1, /* page is not to be cached and should */ /* be reused ahead of other pages (P) */ vmp_private:1, /* Page should not be returned to the free list (P) */ vmp_reference:1, /* page has been used (P) */ vmp_lopage:1, vmp_unused_page_bits:4; /* * MUST keep the 2 32 bit words used as bit fields * separated since the compiler has a nasty habit * of using 64 bit loads and stores on them as * if they were a single 64 bit field... since * they are protected by 2 different locks, this * is a real problem */ vm_page_packed_t vmp_next_m; /* VP bucket link (O) */ /* * The following word of flags is protected by the "VM object" lock. * * IMPORTANT: the "vmp_pmapped", "vmp_xpmapped" and "vmp_clustered" bits can be modified while holding the * VM object "shared" lock + the page lock provided through the pmap_lock_phys_page function. * This is done in vm_fault_enter() and the CONSUME_CLUSTERED macro. * It's also ok to modify them behind just the VM object "exclusive" lock. */ unsigned int vmp_busy:1, /* page is in transit (O) */ vmp_wanted:1, /* someone is waiting for page (O) */ vmp_tabled:1, /* page is in VP table (O) */ vmp_hashed:1, /* page is in vm_page_buckets[] (O) + the bucket lock */ vmp_fictitious:1, /* Physical page doesn't exist (O) */ vmp_clustered:1, /* page is not the faulted page (O) or (O-shared AND pmap_page) */ vmp_pmapped:1, /* page has at some time been entered into a pmap (O) or */ /* (O-shared AND pmap_page) */ vmp_xpmapped:1, /* page has been entered with execute permission (O) or */ /* (O-shared AND pmap_page) */ vmp_wpmapped:1, /* page has been entered at some point into a pmap for write (O) */ vmp_free_when_done:1, /* page is to be freed once cleaning is completed (O) */ vmp_absent:1, /* Data has been requested, but is not yet available (O) */ vmp_error:1, /* Data manager was unable to provide data due to error (O) */ vmp_dirty:1, /* Page must be cleaned (O) */ vmp_cleaning:1, /* Page clean has begun (O) */ vmp_precious:1, /* Page is precious; data must be returned even if clean (O) */ vmp_overwriting:1, /* Request to unlock has been made without having data. (O) */ /* [See vm_fault_page_overwrite] */ vmp_restart:1, /* Page was pushed higher in shadow chain by copy_call-related pagers */ /* start again at top of chain */ vmp_unusual:1, /* Page is absent, error, restart or page locked */ vmp_cs_validated:VMP_CS_BITS, /* code-signing: page was checked */ vmp_cs_tainted:VMP_CS_BITS, /* code-signing: page is tainted */ vmp_cs_nx:VMP_CS_BITS, /* code-signing: page is nx */ vmp_reusable:1, vmp_written_by_kernel:1; /* page was written by kernel (i.e. decompressed) */ #if !defined(__arm64__) ppnum_t vmp_phys_page; /* Physical page number of the page */ #endif }; typedef struct vm_page *vm_page_t; extern vm_page_t vm_pages; extern vm_page_t vm_page_array_beginning_addr; extern vm_page_t vm_page_array_ending_addr; static inline int VMP_CS_FOR_OFFSET( vm_map_offset_t fault_phys_offset) { assertf(fault_phys_offset < PAGE_SIZE && !(fault_phys_offset & FOURK_PAGE_MASK), "offset 0x%llx\n", (uint64_t)fault_phys_offset); return 1 << (fault_phys_offset >> FOURK_PAGE_SHIFT); } static inline bool VMP_CS_VALIDATED( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (fault_page_size == PAGE_SIZE) { return p->vmp_cs_validated == VMP_CS_ALL_TRUE; } return p->vmp_cs_validated & VMP_CS_FOR_OFFSET(fault_phys_offset); } static inline bool VMP_CS_TAINTED( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (fault_page_size == PAGE_SIZE) { return p->vmp_cs_tainted != VMP_CS_ALL_FALSE; } return p->vmp_cs_tainted & VMP_CS_FOR_OFFSET(fault_phys_offset); } static inline bool VMP_CS_NX( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (fault_page_size == PAGE_SIZE) { return p->vmp_cs_nx != VMP_CS_ALL_FALSE; } return p->vmp_cs_nx & VMP_CS_FOR_OFFSET(fault_phys_offset); } static inline void VMP_CS_SET_VALIDATED( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset, boolean_t value) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (value) { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_validated = VMP_CS_ALL_TRUE; } p->vmp_cs_validated |= VMP_CS_FOR_OFFSET(fault_phys_offset); } else { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_validated = VMP_CS_ALL_FALSE; } p->vmp_cs_validated &= ~VMP_CS_FOR_OFFSET(fault_phys_offset); } } static inline void VMP_CS_SET_TAINTED( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset, boolean_t value) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (value) { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_tainted = VMP_CS_ALL_TRUE; } p->vmp_cs_tainted |= VMP_CS_FOR_OFFSET(fault_phys_offset); } else { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_tainted = VMP_CS_ALL_FALSE; } p->vmp_cs_tainted &= ~VMP_CS_FOR_OFFSET(fault_phys_offset); } } static inline void VMP_CS_SET_NX( vm_page_t p, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset, boolean_t value) { assertf(fault_page_size <= PAGE_SIZE, "fault_page_size 0x%llx fault_phys_offset 0x%llx\n", (uint64_t)fault_page_size, (uint64_t)fault_phys_offset); if (value) { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_nx = VMP_CS_ALL_TRUE; } p->vmp_cs_nx |= VMP_CS_FOR_OFFSET(fault_phys_offset); } else { if (fault_page_size == PAGE_SIZE) { p->vmp_cs_nx = VMP_CS_ALL_FALSE; } p->vmp_cs_nx &= ~VMP_CS_FOR_OFFSET(fault_phys_offset); } } #if defined(__arm64__) extern unsigned int vm_first_phys_ppnum; struct vm_page_with_ppnum { struct vm_page vm_page_wo_ppnum; ppnum_t vmp_phys_page; }; typedef struct vm_page_with_ppnum *vm_page_with_ppnum_t; static inline ppnum_t VM_PAGE_GET_PHYS_PAGE(vm_page_t m) { if (m >= vm_page_array_beginning_addr && m < vm_page_array_ending_addr) { return (ppnum_t)((uintptr_t)(m - vm_page_array_beginning_addr) + vm_first_phys_ppnum); } else { return ((vm_page_with_ppnum_t)m)->vmp_phys_page; } } #define VM_PAGE_SET_PHYS_PAGE(m, ppnum) \ MACRO_BEGIN \ if ((m) < vm_page_array_beginning_addr || (m) >= vm_page_array_ending_addr) \ ((vm_page_with_ppnum_t)(m))->vmp_phys_page = ppnum; \ assert(ppnum == VM_PAGE_GET_PHYS_PAGE(m)); \ MACRO_END #define VM_PAGE_GET_COLOR(m) (VM_PAGE_GET_PHYS_PAGE(m) & vm_color_mask) #else /* defined(__arm64__) */ struct vm_page_with_ppnum { struct vm_page vm_page_with_ppnum; }; typedef struct vm_page_with_ppnum *vm_page_with_ppnum_t; #define VM_PAGE_GET_PHYS_PAGE(page) (page)->vmp_phys_page #define VM_PAGE_SET_PHYS_PAGE(page, ppnum) \ MACRO_BEGIN \ (page)->vmp_phys_page = ppnum; \ MACRO_END #define VM_PAGE_GET_CLUMP(m) ((VM_PAGE_GET_PHYS_PAGE(m)) >> vm_clump_shift) #define VM_PAGE_GET_COLOR(m) ((VM_PAGE_GET_CLUMP(m)) & vm_color_mask) #endif /* defined(__arm64__) */ #if defined(__LP64__) /* * Parameters for pointer packing * * * VM Pages pointers might point to: * * 1. VM_PAGE_PACKED_ALIGNED aligned kernel globals, * * 2. VM_PAGE_PACKED_ALIGNED aligned heap allocated vm pages * * 3. entries in the vm_pages array (whose entries aren't VM_PAGE_PACKED_ALIGNED * aligned). * * * The current scheme uses 31 bits of storage and 6 bits of shift using the * VM_PACK_POINTER() scheme for (1-2), and packs (3) as an index within the * vm_pages array, setting the top bit (VM_PAGE_PACKED_FROM_ARRAY). * * This scheme gives us a reach of 128G from VM_MIN_KERNEL_AND_KEXT_ADDRESS. */ #define VM_VPLQ_ALIGNMENT 128 #define VM_PAGE_PACKED_PTR_ALIGNMENT 64 /* must be a power of 2 */ #define VM_PAGE_PACKED_ALIGNED __attribute__((aligned(VM_PAGE_PACKED_PTR_ALIGNMENT))) #define VM_PAGE_PACKED_PTR_BITS 31 #define VM_PAGE_PACKED_PTR_SHIFT 6 #define VM_PAGE_PACKED_PTR_BASE ((uintptr_t)VM_MIN_KERNEL_AND_KEXT_ADDRESS) #define VM_PAGE_PACKED_FROM_ARRAY 0x80000000 static inline vm_page_packed_t vm_page_pack_ptr(uintptr_t p) { if (p >= (uintptr_t)vm_page_array_beginning_addr && p < (uintptr_t)vm_page_array_ending_addr) { ptrdiff_t diff = (vm_page_t)p - vm_page_array_beginning_addr; assert((vm_page_t)p == &vm_pages[diff]); return (vm_page_packed_t)(diff | VM_PAGE_PACKED_FROM_ARRAY); } VM_ASSERT_POINTER_PACKABLE(p, VM_PAGE_PACKED_PTR); vm_offset_t packed = VM_PACK_POINTER(p, VM_PAGE_PACKED_PTR); return CAST_DOWN_EXPLICIT(vm_page_packed_t, packed); } static inline uintptr_t vm_page_unpack_ptr(uintptr_t p) { extern unsigned int vm_pages_count; if (p >= VM_PAGE_PACKED_FROM_ARRAY) { p &= ~VM_PAGE_PACKED_FROM_ARRAY; assert(p < (uintptr_t)vm_pages_count); return (uintptr_t)&vm_pages[p]; } return VM_UNPACK_POINTER(p, VM_PAGE_PACKED_PTR); } #define VM_PAGE_PACK_PTR(p) vm_page_pack_ptr((uintptr_t)(p)) #define VM_PAGE_UNPACK_PTR(p) vm_page_unpack_ptr((uintptr_t)(p)) #define VM_OBJECT_PACK(o) ((vm_page_object_t)VM_PACK_POINTER((uintptr_t)(o), VM_PAGE_PACKED_PTR)) #define VM_OBJECT_UNPACK(p) ((vm_object_t)VM_UNPACK_POINTER(p, VM_PAGE_PACKED_PTR)) #define VM_PAGE_OBJECT(p) VM_OBJECT_UNPACK((p)->vmp_object) #define VM_PAGE_PACK_OBJECT(o) VM_OBJECT_PACK(o) #define VM_PAGE_ZERO_PAGEQ_ENTRY(p) \ MACRO_BEGIN \ (p)->vmp_snext = 0; \ MACRO_END #define VM_PAGE_CONVERT_TO_QUEUE_ENTRY(p) VM_PAGE_PACK_PTR(p) static __inline__ void vm_page_enqueue_tail( vm_page_queue_t que, vm_page_queue_entry_t elt) { vm_page_queue_entry_t old_tail; old_tail = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(que->prev); elt->next = VM_PAGE_PACK_PTR(que); elt->prev = que->prev; que->prev = old_tail->next = VM_PAGE_PACK_PTR(elt); } static __inline__ void vm_page_remque( vm_page_queue_entry_t elt) { vm_page_queue_entry_t next; vm_page_queue_entry_t prev; vm_page_packed_t next_pck = elt->next; vm_page_packed_t prev_pck = elt->prev; next = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(next_pck); /* next may equal prev (and the queue head) if elt was the only element */ prev = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(prev_pck); next->prev = prev_pck; prev->next = next_pck; elt->next = 0; elt->prev = 0; } /* * Macro: vm_page_queue_init * Function: * Initialize the given queue. * Header: * void vm_page_queue_init(q) * vm_page_queue_t q; \* MODIFIED *\ */ #define vm_page_queue_init(q) \ MACRO_BEGIN \ VM_ASSERT_POINTER_PACKABLE((vm_offset_t)(q), VM_PAGE_PACKED_PTR); \ (q)->next = VM_PAGE_PACK_PTR(q); \ (q)->prev = VM_PAGE_PACK_PTR(q); \ MACRO_END /* * Macro: vm_page_queue_enter * Function: * Insert a new element at the tail of the vm_page queue. * Header: * void vm_page_queue_enter(q, elt, field) * queue_t q; * vm_page_t elt; * <field> is the list field in vm_page_t * * This macro's arguments have to match the generic "queue_enter()" macro which is * what is used for this on 32 bit kernels. */ #define vm_page_queue_enter(head, elt, field) \ MACRO_BEGIN \ vm_page_packed_t __pck_elt = VM_PAGE_PACK_PTR(elt); \ vm_page_packed_t __pck_head = VM_PAGE_PACK_PTR(head); \ vm_page_packed_t __pck_prev = (head)->prev; \ \ if (__pck_head == __pck_prev) { \ (head)->next = __pck_elt; \ } else { \ vm_page_t __prev; \ __prev = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_prev); \ __prev->field.next = __pck_elt; \ } \ (elt)->field.prev = __pck_prev; \ (elt)->field.next = __pck_head; \ (head)->prev = __pck_elt; \ MACRO_END #if defined(__x86_64__) /* * These are helper macros for vm_page_queue_enter_clump to assist * with conditional compilation (release / debug / development) */ #if DEVELOPMENT || DEBUG #define __DEBUG_CHECK_BUDDIES(__prev, __p, field) \ MACRO_BEGIN \ if (__prev != NULL) { \ assert(__p == (vm_page_t)VM_PAGE_UNPACK_PTR(__prev->next)); \ assert(__prev == (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(__p->field.prev)); \ } \ MACRO_END #define __DEBUG_VERIFY_LINKS(__first, __n_free, __last_next) \ MACRO_BEGIN \ unsigned int __i; \ vm_page_queue_entry_t __tmp; \ for (__i = 0, __tmp = __first; __i < __n_free; __i++) { \ __tmp = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(__tmp->next); \ } \ assert(__tmp == __last_next); \ MACRO_END #define __DEBUG_STAT_INCREMENT_INRANGE vm_clump_inrange++ #define __DEBUG_STAT_INCREMENT_INSERTS vm_clump_inserts++ #define __DEBUG_STAT_INCREMENT_PROMOTES(__n_free) vm_clump_promotes+=__n_free #else #define __DEBUG_CHECK_BUDDIES(__prev, __p, field) #define __DEBUG_VERIFY_LINKS(__first, __n_free, __last_next) #define __DEBUG_STAT_INCREMENT_INRANGE #define __DEBUG_STAT_INCREMENT_INSERTS #define __DEBUG_STAT_INCREMENT_PROMOTES(__n_free) #endif /* if DEVELOPMENT || DEBUG */ /* * Insert a new page into a free queue and clump pages within the same 16K boundary together */ static inline void vm_page_queue_enter_clump( vm_page_queue_t head, vm_page_t elt) { vm_page_queue_entry_t first = NULL; /* first page in the clump */ vm_page_queue_entry_t last = NULL; /* last page in the clump */ vm_page_queue_entry_t prev = NULL; vm_page_queue_entry_t next; uint_t n_free = 1; extern unsigned int vm_pages_count; extern unsigned int vm_clump_size, vm_clump_mask, vm_clump_shift, vm_clump_promote_threshold; extern unsigned long vm_clump_allocs, vm_clump_inserts, vm_clump_inrange, vm_clump_promotes; /* * If elt is part of the vm_pages[] array, find its neighboring buddies in the array. */ if (vm_page_array_beginning_addr <= elt && elt < &vm_pages[vm_pages_count]) { vm_page_t p; uint_t i; uint_t n; ppnum_t clump_num; first = last = (vm_page_queue_entry_t)elt; clump_num = VM_PAGE_GET_CLUMP(elt); n = VM_PAGE_GET_PHYS_PAGE(elt) & vm_clump_mask; /* * Check for preceeding vm_pages[] entries in the same chunk */ for (i = 0, p = elt - 1; i < n && vm_page_array_beginning_addr <= p; i++, p--) { if (p->vmp_q_state == VM_PAGE_ON_FREE_Q && clump_num == VM_PAGE_GET_CLUMP(p)) { if (prev == NULL) { prev = (vm_page_queue_entry_t)p; } first = (vm_page_queue_entry_t)p; n_free++; } } /* * Check the following vm_pages[] entries in the same chunk */ for (i = n + 1, p = elt + 1; i < vm_clump_size && p < &vm_pages[vm_pages_count]; i++, p++) { if (p->vmp_q_state == VM_PAGE_ON_FREE_Q && clump_num == VM_PAGE_GET_CLUMP(p)) { if (last == (vm_page_queue_entry_t)elt) { /* first one only */ __DEBUG_CHECK_BUDDIES(prev, p, vmp_pageq); } if (prev == NULL) { prev = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(p->vmp_pageq.prev); } last = (vm_page_queue_entry_t)p; n_free++; } } __DEBUG_STAT_INCREMENT_INRANGE; } /* if elt is not part of vm_pages or if 1st page in clump, insert at tail */ if (prev == NULL) { prev = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(head->prev); } /* insert the element */ next = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(prev->next); elt->vmp_pageq.next = prev->next; elt->vmp_pageq.prev = next->prev; prev->next = next->prev = VM_PAGE_PACK_PTR(elt); __DEBUG_STAT_INCREMENT_INSERTS; /* * Check if clump needs to be promoted to head. */ if (n_free >= vm_clump_promote_threshold && n_free > 1) { vm_page_queue_entry_t first_prev; first_prev = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(first->prev); /* If not at head already */ if (first_prev != head) { vm_page_queue_entry_t last_next; vm_page_queue_entry_t head_next; last_next = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(last->next); /* verify that the links within the clump are consistent */ __DEBUG_VERIFY_LINKS(first, n_free, last_next); /* promote clump to head */ first_prev->next = last->next; last_next->prev = first->prev; first->prev = VM_PAGE_PACK_PTR(head); last->next = head->next; head_next = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(head->next); head_next->prev = VM_PAGE_PACK_PTR(last); head->next = VM_PAGE_PACK_PTR(first); __DEBUG_STAT_INCREMENT_PROMOTES(n_free); } } } #endif /* * Macro: vm_page_queue_enter_first * Function: * Insert a new element at the head of the vm_page queue. * Header: * void queue_enter_first(q, elt, , field) * queue_t q; * vm_page_t elt; * <field> is the linkage field in vm_page * * This macro's arguments have to match the generic "queue_enter_first()" macro which is * what is used for this on 32 bit kernels. */ #define vm_page_queue_enter_first(head, elt, field) \ MACRO_BEGIN \ vm_page_packed_t __pck_next = (head)->next; \ vm_page_packed_t __pck_head = VM_PAGE_PACK_PTR(head); \ vm_page_packed_t __pck_elt = VM_PAGE_PACK_PTR(elt); \ \ if (__pck_head == __pck_next) { \ (head)->prev = __pck_elt; \ } else { \ vm_page_t __next; \ __next = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_next); \ __next->field.prev = __pck_elt; \ } \ \ (elt)->field.next = __pck_next; \ (elt)->field.prev = __pck_head; \ (head)->next = __pck_elt; \ MACRO_END /* * Macro: vm_page_queue_remove * Function: * Remove an arbitrary page from a vm_page queue. * Header: * void vm_page_queue_remove(q, qe, field) * arguments as in vm_page_queue_enter * * This macro's arguments have to match the generic "queue_enter()" macro which is * what is used for this on 32 bit kernels. */ #define vm_page_queue_remove(head, elt, field) \ MACRO_BEGIN \ vm_page_packed_t __pck_next = (elt)->field.next; \ vm_page_packed_t __pck_prev = (elt)->field.prev; \ vm_page_t __next = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_next); \ vm_page_t __prev = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_prev); \ \ if ((void *)(head) == (void *)__next) { \ (head)->prev = __pck_prev; \ } else { \ __next->field.prev = __pck_prev; \ } \ \ if ((void *)(head) == (void *)__prev) { \ (head)->next = __pck_next; \ } else { \ __prev->field.next = __pck_next; \ } \ \ (elt)->field.next = 0; \ (elt)->field.prev = 0; \ MACRO_END /* * Macro: vm_page_queue_remove_first * * Function: * Remove and return the entry at the head of a vm_page queue. * * Header: * vm_page_queue_remove_first(head, entry, field) * N.B. entry is returned by reference * * This macro's arguments have to match the generic "queue_remove_first()" macro which is * what is used for this on 32 bit kernels. */ #define vm_page_queue_remove_first(head, entry, field) \ MACRO_BEGIN \ vm_page_packed_t __pck_head = VM_PAGE_PACK_PTR(head); \ vm_page_packed_t __pck_next; \ vm_page_t __next; \ \ (entry) = (vm_page_t)VM_PAGE_UNPACK_PTR((head)->next); \ __pck_next = (entry)->field.next; \ __next = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_next); \ \ if (__pck_head == __pck_next) { \ (head)->prev = __pck_head; \ } else { \ __next->field.prev = __pck_head; \ } \ \ (head)->next = __pck_next; \ (entry)->field.next = 0; \ (entry)->field.prev = 0; \ MACRO_END #if defined(__x86_64__) /* * Macro: vm_page_queue_remove_first_with_clump * Function: * Remove and return the entry at the head of the free queue * end is set to 1 to indicate that we just returned the last page in a clump * * Header: * vm_page_queue_remove_first_with_clump(head, entry, end) * entry is returned by reference * end is returned by reference */ #define vm_page_queue_remove_first_with_clump(head, entry, end) \ MACRO_BEGIN \ vm_page_packed_t __pck_head = VM_PAGE_PACK_PTR(head); \ vm_page_packed_t __pck_next; \ vm_page_t __next; \ \ (entry) = (vm_page_t)VM_PAGE_UNPACK_PTR((head)->next); \ __pck_next = (entry)->vmp_pageq.next; \ __next = (vm_page_t)VM_PAGE_UNPACK_PTR(__pck_next); \ \ (end) = 0; \ if (__pck_head == __pck_next) { \ (head)->prev = __pck_head; \ (end) = 1; \ } else { \ __next->vmp_pageq.prev = __pck_head; \ if (VM_PAGE_GET_CLUMP(entry) != VM_PAGE_GET_CLUMP(__next)) { \ (end) = 1; \ } \ } \ \ (head)->next = __pck_next; \ (entry)->vmp_pageq.next = 0; \ (entry)->vmp_pageq.prev = 0; \ MACRO_END #endif /* * Macro: vm_page_queue_end * Function: * Tests whether a new entry is really the end of * the queue. * Header: * boolean_t vm_page_queue_end(q, qe) * vm_page_queue_t q; * vm_page_queue_entry_t qe; */ #define vm_page_queue_end(q, qe) ((q) == (qe)) /* * Macro: vm_page_queue_empty * Function: * Tests whether a queue is empty. * Header: * boolean_t vm_page_queue_empty(q) * vm_page_queue_t q; */ #define vm_page_queue_empty(q) vm_page_queue_end((q), ((vm_page_queue_entry_t)vm_page_queue_first(q))) /* * Macro: vm_page_queue_first * Function: * Returns the first entry in the queue, * Header: * uintpr_t vm_page_queue_first(q) * vm_page_queue_t q; \* IN *\ */ #define vm_page_queue_first(q) (VM_PAGE_UNPACK_PTR((q)->next)) /* * Macro: vm_page_queue_last * Function: * Returns the last entry in the queue. * Header: * vm_page_queue_entry_t queue_last(q) * queue_t q; \* IN *\ */ #define vm_page_queue_last(q) (VM_PAGE_UNPACK_PTR((q)->prev)) /* * Macro: vm_page_queue_next * Function: * Returns the entry after an item in the queue. * Header: * uintpr_t vm_page_queue_next(qc) * vm_page_queue_t qc; */ #define vm_page_queue_next(qc) (VM_PAGE_UNPACK_PTR((qc)->next)) /* * Macro: vm_page_queue_prev * Function: * Returns the entry before an item in the queue. * Header: * uinptr_t vm_page_queue_prev(qc) * vm_page_queue_t qc; */ #define vm_page_queue_prev(qc) (VM_PAGE_UNPACK_PTR((qc)->prev)) /* * Macro: vm_page_queue_iterate * Function: * iterate over each item in a vm_page queue. * Generates a 'for' loop, setting elt to * each item in turn (by reference). * Header: * vm_page_queue_iterate(q, elt, field) * queue_t q; * vm_page_t elt; * <field> is the chain field in vm_page_t */ #define vm_page_queue_iterate(head, elt, field) \ for ((elt) = (vm_page_t)vm_page_queue_first(head); \ !vm_page_queue_end((head), (vm_page_queue_entry_t)(elt)); \ (elt) = (vm_page_t)vm_page_queue_next(&(elt)->field)) \ #else // LP64 #define VM_VPLQ_ALIGNMENT 128 #define VM_PAGE_PACKED_PTR_ALIGNMENT sizeof(vm_offset_t) #define VM_PAGE_PACKED_ALIGNED #define VM_PAGE_PACKED_PTR_BITS 32 #define VM_PAGE_PACKED_PTR_SHIFT 0 #define VM_PAGE_PACKED_PTR_BASE 0 #define VM_PAGE_PACKED_FROM_ARRAY 0 #define VM_PAGE_PACK_PTR(p) (p) #define VM_PAGE_UNPACK_PTR(p) ((uintptr_t)(p)) #define VM_OBJECT_PACK(o) ((vm_page_object_t)(o)) #define VM_OBJECT_UNPACK(p) ((vm_object_t)(p)) #define VM_PAGE_PACK_OBJECT(o) VM_OBJECT_PACK(o) #define VM_PAGE_OBJECT(p) VM_OBJECT_UNPACK((p)->vmp_object) #define VM_PAGE_ZERO_PAGEQ_ENTRY(p) \ MACRO_BEGIN \ (p)->vmp_pageq.next = 0; \ (p)->vmp_pageq.prev = 0; \ MACRO_END #define VM_PAGE_CONVERT_TO_QUEUE_ENTRY(p) ((queue_entry_t)(p)) #define vm_page_remque remque #define vm_page_enqueue_tail enqueue_tail #define vm_page_queue_init queue_init #define vm_page_queue_enter(h, e, f) queue_enter(h, e, vm_page_t, f) #define vm_page_queue_enter_first(h, e, f) queue_enter_first(h, e, vm_page_t, f) #define vm_page_queue_remove(h, e, f) queue_remove(h, e, vm_page_t, f) #define vm_page_queue_remove_first(h, e, f) queue_remove_first(h, e, vm_page_t, f) #define vm_page_queue_end queue_end #define vm_page_queue_empty queue_empty #define vm_page_queue_first queue_first #define vm_page_queue_last queue_last #define vm_page_queue_next queue_next #define vm_page_queue_prev queue_prev #define vm_page_queue_iterate(h, e, f) queue_iterate(h, e, vm_page_t, f) #endif // __LP64__ /* * VM_PAGE_MIN_SPECULATIVE_AGE_Q through VM_PAGE_MAX_SPECULATIVE_AGE_Q * represents a set of aging bins that are 'protected'... * * VM_PAGE_SPECULATIVE_AGED_Q is a list of the speculative pages that have * not yet been 'claimed' but have been aged out of the protective bins * this occurs in vm_page_speculate when it advances to the next bin * and discovers that it is still occupied... at that point, all of the * pages in that bin are moved to the VM_PAGE_SPECULATIVE_AGED_Q. the pages * in that bin are all guaranteed to have reached at least the maximum age * we allow for a protected page... they can be older if there is no * memory pressure to pull them from the bin, or there are no new speculative pages * being generated to push them out. * this list is the one that vm_pageout_scan will prefer when looking * for pages to move to the underweight free list * * VM_PAGE_MAX_SPECULATIVE_AGE_Q * VM_PAGE_SPECULATIVE_Q_AGE_MS * defines the amount of time a speculative page is normally * allowed to live in the 'protected' state (i.e. not available * to be stolen if vm_pageout_scan is running and looking for * pages)... however, if the total number of speculative pages * in the protected state exceeds our limit (defined in vm_pageout.c) * and there are none available in VM_PAGE_SPECULATIVE_AGED_Q, then * vm_pageout_scan is allowed to steal pages from the protected * bucket even if they are underage. * * vm_pageout_scan is also allowed to pull pages from a protected * bin if the bin has reached the "age of consent" we've set */ #define VM_PAGE_MAX_SPECULATIVE_AGE_Q 10 #define VM_PAGE_MIN_SPECULATIVE_AGE_Q 1 #define VM_PAGE_SPECULATIVE_AGED_Q 0 #define VM_PAGE_SPECULATIVE_Q_AGE_MS 500 struct vm_speculative_age_q { /* * memory queue for speculative pages via clustered pageins */ vm_page_queue_head_t age_q; mach_timespec_t age_ts; } VM_PAGE_PACKED_ALIGNED; extern struct vm_speculative_age_q vm_page_queue_speculative[]; extern int speculative_steal_index; extern int speculative_age_index; extern unsigned int vm_page_speculative_q_age_ms; typedef struct vm_locks_array { char pad __attribute__ ((aligned(64))); lck_mtx_t vm_page_queue_lock2 __attribute__ ((aligned(64))); lck_mtx_t vm_page_queue_free_lock2 __attribute__ ((aligned(64))); char pad2 __attribute__ ((aligned(64))); } vm_locks_array_t; extern void vm_page_assign_special_state(vm_page_t mem, int mode); extern void vm_page_update_special_state(vm_page_t mem); extern void vm_page_add_to_specialq(vm_page_t mem, boolean_t first); extern void vm_page_remove_from_specialq(vm_page_t mem); #define VM_PAGE_WIRED(m) ((m)->vmp_q_state == VM_PAGE_IS_WIRED) #define NEXT_PAGE(m) ((m)->vmp_snext) #define NEXT_PAGE_PTR(m) (&(m)->vmp_snext) /* * XXX The unusual bit should not be necessary. Most of the bit * XXX fields above really want to be masks. */ /* * For debugging, this macro can be defined to perform * some useful check on a page structure. * INTENTIONALLY left as a no-op so that the * current call-sites can be left intact for future uses. */ #define VM_PAGE_CHECK(mem) \ MACRO_BEGIN \ MACRO_END /* Page coloring: * * The free page list is actually n lists, one per color, * where the number of colors is a function of the machine's * cache geometry set at system initialization. To disable * coloring, set vm_colors to 1 and vm_color_mask to 0. * The boot-arg "colors" may be used to override vm_colors. * Note that there is little harm in having more colors than needed. */ #define MAX_COLORS 128 #define DEFAULT_COLORS 32 extern unsigned int vm_colors; /* must be in range 1..MAX_COLORS */ extern unsigned int vm_color_mask; /* must be (vm_colors-1) */ extern unsigned int vm_cache_geometry_colors; /* optimal #colors based on cache geometry */ /* * Wired memory is a very limited resource and we can't let users exhaust it * and deadlock the entire system. We enforce the following limits: * * vm_per_task_user_wire_limit * how much memory can be user-wired in one user task * * vm_global_user_wire_limit (default: same as vm_per_task_user_wire_limit) * how much memory can be user-wired in all user tasks * * These values are set to defaults based on the number of pages managed * by the VM system. They can be overriden via sysctls. * See kmem_set_user_wire_limits for details on the default values. * * Regardless of the amount of memory in the system, we never reserve * more than VM_NOT_USER_WIREABLE_MAX bytes as unlockable. */ #if defined(__LP64__) #define VM_NOT_USER_WIREABLE_MAX (32ULL*1024*1024*1024) /* 32GB */ #else #define VM_NOT_USER_WIREABLE_MAX (1UL*1024*1024*1024) /* 1GB */ #endif /* __LP64__ */ extern vm_map_size_t vm_per_task_user_wire_limit; extern vm_map_size_t vm_global_user_wire_limit; extern uint64_t vm_add_wire_count_over_global_limit; extern uint64_t vm_add_wire_count_over_user_limit; /* * Each pageable resident page falls into one of three lists: * * free * Available for allocation now. The free list is * actually an array of lists, one per color. * inactive * Not referenced in any map, but still has an * object/offset-page mapping, and may be dirty. * This is the list of pages that should be * paged out next. There are actually two * inactive lists, one for pages brought in from * disk or other backing store, and another * for "zero-filled" pages. See vm_pageout_scan() * for the distinction and usage. * active * A list of pages which have been placed in * at least one physical map. This list is * ordered, in LRU-like fashion. */ #define VPL_LOCK_SPIN 1 struct vpl { vm_page_queue_head_t vpl_queue; unsigned int vpl_count; unsigned int vpl_internal_count; unsigned int vpl_external_count; lck_spin_t vpl_lock; }; extern struct vpl * /* __zpercpu */ vm_page_local_q; extern unsigned int vm_page_local_q_soft_limit; extern unsigned int vm_page_local_q_hard_limit; extern vm_locks_array_t vm_page_locks; extern vm_page_queue_head_t vm_lopage_queue_free; /* low memory free queue */ extern vm_page_queue_head_t vm_page_queue_active; /* active memory queue */ extern vm_page_queue_head_t vm_page_queue_inactive; /* inactive memory queue for normal pages */ #if CONFIG_SECLUDED_MEMORY extern vm_page_queue_head_t vm_page_queue_secluded; /* reclaimable pages secluded for Camera */ #endif /* CONFIG_SECLUDED_MEMORY */ extern vm_page_queue_head_t vm_page_queue_cleaned; /* clean-queue inactive memory */ extern vm_page_queue_head_t vm_page_queue_anonymous; /* inactive memory queue for anonymous pages */ extern vm_page_queue_head_t vm_page_queue_throttled; /* memory queue for throttled pageout pages */ extern queue_head_t vm_objects_wired; extern lck_spin_t vm_objects_wired_lock; #define VM_PAGE_DONATE_DISABLED 0 #define VM_PAGE_DONATE_ENABLED 1 extern uint32_t vm_page_donate_mode; extern bool vm_page_donate_queue_ripe; #define VM_PAGE_BACKGROUND_TARGET_MAX 50000 #define VM_PAGE_BG_DISABLED 0 #define VM_PAGE_BG_ENABLED 1 extern vm_page_queue_head_t vm_page_queue_background; extern uint64_t vm_page_background_promoted_count; extern uint32_t vm_page_background_count; extern uint32_t vm_page_background_target; extern uint32_t vm_page_background_internal_count; extern uint32_t vm_page_background_external_count; extern uint32_t vm_page_background_mode; extern uint32_t vm_page_background_exclude_external; extern vm_page_queue_head_t vm_page_queue_donate; extern uint32_t vm_page_donate_count; extern uint32_t vm_page_donate_target_low; extern uint32_t vm_page_donate_target_high; #define VM_PAGE_DONATE_TARGET_LOWWATER (100) #define VM_PAGE_DONATE_TARGET_HIGHWATER ((unsigned int)(atop_64(max_mem) / 8)) extern vm_offset_t first_phys_addr; /* physical address for first_page */ extern vm_offset_t last_phys_addr; /* physical address for last_page */ extern unsigned int vm_page_free_count; /* How many pages are free? (sum of all colors) */ extern unsigned int vm_page_active_count; /* How many pages are active? */ extern unsigned int vm_page_inactive_count; /* How many pages are inactive? */ extern unsigned int vm_page_kernelcache_count; /* How many pages are used for the kernelcache? */ #if CONFIG_SECLUDED_MEMORY extern unsigned int vm_page_secluded_count; /* How many pages are secluded? */ extern unsigned int vm_page_secluded_count_free; /* how many of them are free? */ extern unsigned int vm_page_secluded_count_inuse; /* how many of them are in use? */ /* * We keep filling the secluded pool with new eligible pages and * we can overshoot our target by a lot. * When there's memory pressure, vm_pageout_scan() will re-balance the queues, * pushing the extra secluded pages to the active or free queue. * Since these "over target" secluded pages are actually "available", jetsam * should consider them as such, so make them visible to jetsam via the * "vm_page_secluded_count_over_target" counter and update it whenever we * update vm_page_secluded_count or vm_page_secluded_target. */ extern unsigned int vm_page_secluded_count_over_target; #define VM_PAGE_SECLUDED_COUNT_OVER_TARGET_UPDATE() \ MACRO_BEGIN \ if (vm_page_secluded_count > vm_page_secluded_target) { \ vm_page_secluded_count_over_target = \ (vm_page_secluded_count - vm_page_secluded_target); \ } else { \ vm_page_secluded_count_over_target = 0; \ } \ MACRO_END #define VM_PAGE_SECLUDED_COUNT_OVER_TARGET() vm_page_secluded_count_over_target #else /* CONFIG_SECLUDED_MEMORY */ #define VM_PAGE_SECLUDED_COUNT_OVER_TARGET_UPDATE() \ MACRO_BEGIN \ MACRO_END #define VM_PAGE_SECLUDED_COUNT_OVER_TARGET() 0 #endif /* CONFIG_SECLUDED_MEMORY */ extern unsigned int vm_page_cleaned_count; /* How many pages are in the clean queue? */ extern unsigned int vm_page_throttled_count;/* How many inactives are throttled */ extern unsigned int vm_page_speculative_count; /* How many speculative pages are unclaimed? */ extern unsigned int vm_page_pageable_internal_count; extern unsigned int vm_page_pageable_external_count; extern unsigned int vm_page_xpmapped_external_count; /* How many pages are mapped executable? */ extern unsigned int vm_page_external_count; /* How many pages are file-backed? */ extern unsigned int vm_page_internal_count; /* How many pages are anonymous? */ extern unsigned int vm_page_wire_count; /* How many pages are wired? */ extern unsigned int vm_page_wire_count_initial; /* How many pages wired at startup */ extern unsigned int vm_page_wire_count_on_boot; /* even earlier than _initial */ extern unsigned int vm_page_free_target; /* How many do we want free? */ extern unsigned int vm_page_free_min; /* When to wakeup pageout */ extern unsigned int vm_page_throttle_limit; /* When to throttle new page creation */ extern unsigned int vm_page_inactive_target;/* How many do we want inactive? */ #if CONFIG_SECLUDED_MEMORY extern unsigned int vm_page_secluded_target;/* How many do we want secluded? */ #endif /* CONFIG_SECLUDED_MEMORY */ extern unsigned int vm_page_anonymous_min; /* When it's ok to pre-clean */ extern unsigned int vm_page_free_reserved; /* How many pages reserved to do pageout */ extern unsigned int vm_page_gobble_count; extern unsigned int vm_page_stolen_count; /* Count of stolen pages not acccounted in zones */ extern unsigned int vm_page_kern_lpage_count; /* Count of large pages used in early boot */ #if DEVELOPMENT || DEBUG extern unsigned int vm_page_speculative_used; #endif extern unsigned int vm_page_purgeable_count;/* How many pages are purgeable now ? */ extern unsigned int vm_page_purgeable_wired_count;/* How many purgeable pages are wired now ? */ extern uint64_t vm_page_purged_count; /* How many pages got purged so far ? */ extern unsigned int vm_page_free_wanted; /* how many threads are waiting for memory */ extern unsigned int vm_page_free_wanted_privileged; /* how many VM privileged threads are waiting for memory */ #if CONFIG_SECLUDED_MEMORY extern unsigned int vm_page_free_wanted_secluded; /* how many threads are waiting for secluded memory */ #endif /* CONFIG_SECLUDED_MEMORY */ extern const ppnum_t vm_page_fictitious_addr; /* (fake) phys_addr of fictitious pages */ extern const ppnum_t vm_page_guard_addr; /* (fake) phys_addr of guard pages */ extern boolean_t vm_page_deactivate_hint; extern int vm_compressor_mode; /* * Defaults to true, so highest memory is used first. */ extern boolean_t vm_himemory_mode; extern boolean_t vm_lopage_needed; extern uint32_t vm_lopage_free_count; extern uint32_t vm_lopage_free_limit; extern uint32_t vm_lopage_lowater; extern boolean_t vm_lopage_refill; extern uint64_t max_valid_dma_address; extern ppnum_t max_valid_low_ppnum; /* * Prototypes for functions exported by this module. */ extern void vm_page_bootstrap( vm_offset_t *startp, vm_offset_t *endp); extern void vm_page_init_local_q(unsigned int num_cpus); extern void vm_page_create( ppnum_t start, ppnum_t end); extern void vm_page_create_retired( ppnum_t pn); extern vm_page_t kdp_vm_page_lookup( vm_object_t object, vm_object_offset_t offset); extern vm_page_t vm_page_lookup( vm_object_t object, vm_object_offset_t offset); extern vm_page_t vm_page_grab_fictitious(boolean_t canwait); extern vm_page_t vm_page_grab_guard(boolean_t canwait); extern void vm_page_release_fictitious( vm_page_t page); extern void vm_free_delayed_pages(void); extern bool vm_pool_low(void); extern vm_page_t vm_page_grab(void); extern vm_page_t vm_page_grab_options(int flags); #define VM_PAGE_GRAB_OPTIONS_NONE 0x00000000 #if CONFIG_SECLUDED_MEMORY #define VM_PAGE_GRAB_SECLUDED 0x00000001 #endif /* CONFIG_SECLUDED_MEMORY */ #define VM_PAGE_GRAB_Q_LOCK_HELD 0x00000002 extern vm_page_t vm_page_grablo(void); extern void vm_page_release( vm_page_t page, boolean_t page_queues_locked); extern boolean_t vm_page_wait( int interruptible ); extern vm_page_t vm_page_alloc( vm_object_t object, vm_object_offset_t offset); extern void vm_page_init( vm_page_t page, ppnum_t phys_page, boolean_t lopage); extern void vm_page_free( vm_page_t page); extern void vm_page_free_unlocked( vm_page_t page, boolean_t remove_from_hash); extern void vm_page_balance_inactive( int max_to_move); extern void vm_page_activate( vm_page_t page); extern void vm_page_deactivate( vm_page_t page); extern void vm_page_deactivate_internal( vm_page_t page, boolean_t clear_hw_reference); extern void vm_page_enqueue_cleaned(vm_page_t page); extern void vm_page_lru( vm_page_t page); extern void vm_page_speculate( vm_page_t page, boolean_t new); extern void vm_page_speculate_ageit( struct vm_speculative_age_q *aq); extern void vm_page_reactivate_all_throttled(void); extern void vm_page_reactivate_local(uint32_t lid, boolean_t force, boolean_t nolocks); extern void vm_page_rename( vm_page_t page, vm_object_t new_object, vm_object_offset_t new_offset); extern void vm_page_insert( vm_page_t page, vm_object_t object, vm_object_offset_t offset); extern void vm_page_insert_wired( vm_page_t page, vm_object_t object, vm_object_offset_t offset, vm_tag_t tag); extern void vm_page_insert_internal( vm_page_t page, vm_object_t object, vm_object_offset_t offset, vm_tag_t tag, boolean_t queues_lock_held, boolean_t insert_in_hash, boolean_t batch_pmap_op, boolean_t delayed_accounting, uint64_t *delayed_ledger_update); extern void vm_page_replace( vm_page_t mem, vm_object_t object, vm_object_offset_t offset); extern void vm_page_remove( vm_page_t page, boolean_t remove_from_hash); extern void vm_page_zero_fill( vm_page_t page); extern void vm_page_part_zero_fill( vm_page_t m, vm_offset_t m_pa, vm_size_t len); extern void vm_page_copy( vm_page_t src_page, vm_page_t dest_page); extern void vm_page_part_copy( vm_page_t src_m, vm_offset_t src_pa, vm_page_t dst_m, vm_offset_t dst_pa, vm_size_t len); extern void vm_page_wire( vm_page_t page, vm_tag_t tag, boolean_t check_memorystatus); extern void vm_page_unwire( vm_page_t page, boolean_t queueit); extern void vm_set_page_size(void); extern void vm_page_gobble( vm_page_t page); extern void vm_page_validate_cs( vm_page_t page, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset); extern void vm_page_validate_cs_mapped( vm_page_t page, vm_map_size_t fault_page_size, vm_map_offset_t fault_phys_offset, const void *kaddr); extern void vm_page_validate_cs_mapped_slow( vm_page_t page, const void *kaddr); extern void vm_page_validate_cs_mapped_chunk( vm_page_t page, const void *kaddr, vm_offset_t chunk_offset, vm_size_t chunk_size, boolean_t *validated, unsigned *tainted); extern void vm_page_free_prepare_queues( vm_page_t page); extern void vm_page_free_prepare_object( vm_page_t page, boolean_t remove_from_hash); #if CONFIG_IOSCHED extern wait_result_t vm_page_sleep( vm_object_t object, vm_page_t m, int interruptible); #endif extern void vm_pressure_response(void); #if CONFIG_JETSAM extern void memorystatus_pages_update(unsigned int pages_avail); #define VM_CHECK_MEMORYSTATUS do { \ memorystatus_pages_update( \ vm_page_pageable_external_count + \ vm_page_free_count + \ VM_PAGE_SECLUDED_COUNT_OVER_TARGET() + \ (VM_DYNAMIC_PAGING_ENABLED() ? 0 : vm_page_purgeable_count) \ ); \ } while(0) #else /* CONFIG_JETSAM */ #if !XNU_TARGET_OS_OSX #define VM_CHECK_MEMORYSTATUS do {} while(0) #else /* !XNU_TARGET_OS_OSX */ #define VM_CHECK_MEMORYSTATUS vm_pressure_response() #endif /* !XNU_TARGET_OS_OSX */ #endif /* CONFIG_JETSAM */ /* * Functions implemented as macros. m->vmp_wanted and m->vmp_busy are * protected by the object lock. */ #if !XNU_TARGET_OS_OSX #define SET_PAGE_DIRTY(m, set_pmap_modified) \ MACRO_BEGIN \ vm_page_t __page__ = (m); \ if (__page__->vmp_pmapped == TRUE && \ __page__->vmp_wpmapped == TRUE && \ __page__->vmp_dirty == FALSE && \ (set_pmap_modified)) { \ pmap_set_modify(VM_PAGE_GET_PHYS_PAGE(__page__)); \ } \ __page__->vmp_dirty = TRUE; \ MACRO_END #else /* !XNU_TARGET_OS_OSX */ #define SET_PAGE_DIRTY(m, set_pmap_modified) \ MACRO_BEGIN \ vm_page_t __page__ = (m); \ __page__->vmp_dirty = TRUE; \ MACRO_END #endif /* !XNU_TARGET_OS_OSX */ #define PAGE_ASSERT_WAIT(m, interruptible) \ (((m)->vmp_wanted = TRUE), \ assert_wait((event_t) (m), (interruptible))) #if CONFIG_IOSCHED #define PAGE_SLEEP(o, m, interruptible) \ vm_page_sleep(o, m, interruptible) #else #define PAGE_SLEEP(o, m, interruptible) \ (((m)->vmp_wanted = TRUE), \ thread_sleep_vm_object((o), (m), (interruptible))) #endif #define PAGE_WAKEUP_DONE(m) \ MACRO_BEGIN \ (m)->vmp_busy = FALSE; \ if ((m)->vmp_wanted) { \ (m)->vmp_wanted = FALSE; \ thread_wakeup((event_t) (m)); \ } \ MACRO_END #define PAGE_WAKEUP(m) \ MACRO_BEGIN \ if ((m)->vmp_wanted) { \ (m)->vmp_wanted = FALSE; \ thread_wakeup((event_t) (m)); \ } \ MACRO_END #define VM_PAGE_FREE(p) \ MACRO_BEGIN \ vm_page_free_unlocked(p, TRUE); \ MACRO_END #define VM_PAGE_WAIT() ((void)vm_page_wait(THREAD_UNINT)) #define vm_page_queue_lock (vm_page_locks.vm_page_queue_lock2) #define vm_page_queue_free_lock (vm_page_locks.vm_page_queue_free_lock2) static inline void vm_free_page_lock(void) { lck_mtx_lock(&vm_page_queue_free_lock); } static inline void vm_free_page_lock_spin(void) { lck_mtx_lock_spin(&vm_page_queue_free_lock); } static inline void vm_free_page_unlock(void) { lck_mtx_unlock(&vm_page_queue_free_lock); } static inline void vm_page_lock_queues(void) { lck_mtx_lock(&vm_page_queue_lock); } static inline boolean_t vm_page_trylock_queues(void) { boolean_t ret; ret = lck_mtx_try_lock(&vm_page_queue_lock); return ret; } static inline void vm_page_unlock_queues(void) { lck_mtx_unlock(&vm_page_queue_lock); } static inline void vm_page_lockspin_queues(void) { lck_mtx_lock_spin(&vm_page_queue_lock); } static inline boolean_t vm_page_trylockspin_queues(void) { boolean_t ret; ret = lck_mtx_try_lock_spin(&vm_page_queue_lock); return ret; } #define vm_page_lockconvert_queues() lck_mtx_convert_spin(&vm_page_queue_lock) #ifdef VPL_LOCK_SPIN extern lck_grp_t vm_page_lck_grp_local; #define VPL_LOCK_INIT(vlq, vpl_grp, vpl_attr) lck_spin_init(&vlq->vpl_lock, vpl_grp, vpl_attr) #define VPL_LOCK(vpl) lck_spin_lock_grp(vpl, &vm_page_lck_grp_local) #define VPL_UNLOCK(vpl) lck_spin_unlock(vpl) #else #define VPL_LOCK_INIT(vlq, vpl_grp, vpl_attr) lck_mtx_init(&vlq->vpl_lock, vpl_grp, vpl_attr) #define VPL_LOCK(vpl) lck_mtx_lock_spin(vpl) #define VPL_UNLOCK(vpl) lck_mtx_unlock(vpl) #endif #if DEVELOPMENT || DEBUG #define VM_PAGE_SPECULATIVE_USED_ADD() \ MACRO_BEGIN \ OSAddAtomic(1, &vm_page_speculative_used); \ MACRO_END #else #define VM_PAGE_SPECULATIVE_USED_ADD() #endif #define VM_PAGE_CONSUME_CLUSTERED(mem) \ MACRO_BEGIN \ ppnum_t __phys_page; \ __phys_page = VM_PAGE_GET_PHYS_PAGE(mem); \ pmap_lock_phys_page(__phys_page); \ if (mem->vmp_clustered) { \ vm_object_t o; \ o = VM_PAGE_OBJECT(mem); \ assert(o); \ o->pages_used++; \ mem->vmp_clustered = FALSE; \ VM_PAGE_SPECULATIVE_USED_ADD(); \ } \ pmap_unlock_phys_page(__phys_page); \ MACRO_END #define VM_PAGE_COUNT_AS_PAGEIN(mem) \ MACRO_BEGIN \ { \ vm_object_t o; \ o = VM_PAGE_OBJECT(mem); \ DTRACE_VM2(pgin, int, 1, (uint64_t *), NULL); \ counter_inc(¤t_task()->pageins); \ if (o->internal) { \ DTRACE_VM2(anonpgin, int, 1, (uint64_t *), NULL); \ } else { \ DTRACE_VM2(fspgin, int, 1, (uint64_t *), NULL); \ } \ } \ MACRO_END /* adjust for stolen pages accounted elsewhere */ #define VM_PAGE_MOVE_STOLEN(page_count) \ MACRO_BEGIN \ vm_page_stolen_count -= (page_count); \ vm_page_wire_count_initial -= (page_count); \ MACRO_END #define DW_vm_page_unwire 0x01 #define DW_vm_page_wire 0x02 #define DW_vm_page_free 0x04 #define DW_vm_page_activate 0x08 #define DW_vm_page_deactivate_internal 0x10 #define DW_vm_page_speculate 0x20 #define DW_vm_page_lru 0x40 #define DW_vm_pageout_throttle_up 0x80 #define DW_PAGE_WAKEUP 0x100 #define DW_clear_busy 0x200 #define DW_clear_reference 0x400 #define DW_set_reference 0x800 #define DW_move_page 0x1000 #define DW_VM_PAGE_QUEUES_REMOVE 0x2000 #define DW_enqueue_cleaned 0x4000 #define DW_vm_phantom_cache_update 0x8000 struct vm_page_delayed_work { vm_page_t dw_m; int dw_mask; }; #define DEFAULT_DELAYED_WORK_LIMIT 32 struct vm_page_delayed_work_ctx { struct vm_page_delayed_work dwp[DEFAULT_DELAYED_WORK_LIMIT]; thread_t delayed_owner; }; void vm_page_do_delayed_work(vm_object_t object, vm_tag_t tag, struct vm_page_delayed_work *dwp, int dw_count); extern unsigned int vm_max_delayed_work_limit; #define DELAYED_WORK_LIMIT(max) ((vm_max_delayed_work_limit >= max ? max : vm_max_delayed_work_limit)) /* * vm_page_do_delayed_work may need to drop the object lock... * if it does, we need the pages it's looking at to * be held stable via the busy bit, so if busy isn't already * set, we need to set it and ask vm_page_do_delayed_work * to clear it and wakeup anyone that might have blocked on * it once we're done processing the page. */ #define VM_PAGE_ADD_DELAYED_WORK(dwp, mem, dw_cnt) \ MACRO_BEGIN \ if (mem->vmp_busy == FALSE) { \ mem->vmp_busy = TRUE; \ if ( !(dwp->dw_mask & DW_vm_page_free)) \ dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); \ } \ dwp->dw_m = mem; \ dwp++; \ dw_cnt++; \ MACRO_END extern vm_page_t vm_object_page_grab(vm_object_t); #if VM_PAGE_BUCKETS_CHECK extern void vm_page_buckets_check(void); #endif /* VM_PAGE_BUCKETS_CHECK */ extern void vm_page_queues_remove(vm_page_t mem, boolean_t remove_from_specialq); extern void vm_page_remove_internal(vm_page_t page); extern void vm_page_enqueue_inactive(vm_page_t mem, boolean_t first); extern void vm_page_enqueue_active(vm_page_t mem, boolean_t first); extern void vm_page_check_pageable_safe(vm_page_t page); #if CONFIG_SECLUDED_MEMORY extern uint64_t secluded_shutoff_trigger; extern uint64_t secluded_shutoff_headroom; extern void start_secluded_suppression(task_t); extern void stop_secluded_suppression(task_t); #endif /* CONFIG_SECLUDED_MEMORY */ extern void vm_retire_boot_pages(void); #define VMP_ERROR_GET(p) ((p)->vmp_error) #endif /* _VM_VM_PAGE_H_ */ |