1 /*
2 * Copyright (c) 2007-2020 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
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20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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23 * Please see the License for the specific language governing rights and
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27 */
28 /**
29 * Machine-dependent structures for the physical map module.
30 *
31 * This header file contains the types and prototypes that make up the public
32 * pmap API that's exposed to the rest of the kernel. Any types/prototypes used
33 * strictly by the pmap itself should be placed into one of the osfmk/arm/pmap/
34 * header files.
35 *
36 * To prevent circular dependencies and exposing anything not needed by the
37 * rest of the kernel, this file shouldn't include ANY of the internal
38 * osfmk/arm/pmap/ header files.
39 */
40 #ifndef _ARM_PMAP_H_
41 #define _ARM_PMAP_H_
42
43 #include <mach_assert.h>
44
45 #include <arm64/proc_reg.h>
46
47 #ifndef ASSEMBLER
48
49 #include <stdatomic.h>
50 #include <stdbool.h>
51 #include <libkern/section_keywords.h>
52 #include <mach/kern_return.h>
53 #include <mach/machine/vm_types.h>
54 #include <arm64/sptm/pmap/pmap_public.h>
55 #include <kern/ast.h>
56 #include <mach/arm/thread_status.h>
57 #include <os/refcnt.h>
58
59 #include <arm64/tlb.h>
60
61
62 /* Shift for 2048 max virtual ASIDs (2048 pmaps). */
63 #define ASID_SHIFT (11)
64
65 /* Max supported ASIDs (can be virtual). */
66 #define MAX_ASIDS (1 << ASID_SHIFT)
67
68 /* Shift for the maximum ARM ASID value (256 or 65536) */
69 #ifndef ARM_ASID_SHIFT
70 #if HAS_16BIT_ASID
71 #define ARM_ASID_SHIFT (16)
72 #else
73 #define ARM_ASID_SHIFT (8)
74 #endif /* HAS_16BIT_ASID */
75 #endif /* ARM_ASID_SHIFT */
76
77 /* Max ASIDs supported by the hardware. */
78 #define ARM_MAX_ASIDS (1 << ARM_ASID_SHIFT)
79
80 /* Number of bits in a byte. */
81 #define NBBY (8)
82
83 /**
84 * The maximum number of hardware ASIDs used by the pmap for user address spaces.
85 *
86 * One ASID is always dedicated to the kernel (ASID 0). On systems with software-
87 * based spectre/meltdown mitigations, each address space technically uses two
88 * hardware ASIDs (one for EL1 and one for EL0) so the total number of available
89 * ASIDs a user process can use is halved on those systems.
90 */
91 #if __ARM_KERNEL_PROTECT__
92 #define MAX_HW_ASIDS (ARM_MAX_ASIDS >> 1)
93 #else
94 #define MAX_HW_ASIDS ARM_MAX_ASIDS
95 #endif /* __ARM_KERNEL_PROTECT__ */
96
97 /**
98 * Maximum number of Virtual Machine IDs.
99 *
100 * All even number physical VMIDs are reserved for SK usage. Thus only 128
101 * logical VMIDs are available. Software will convert the logical VMID to
102 * the proper odd numbered physical VMID when allocating/freeing VMIDs.
103 */
104 #ifndef ARM_VMID_SHIFT
105 #define ARM_VMID_SHIFT (7)
106 #endif /* ARM_VMID_SHIFT */
107 #define ARM_MAX_VMIDS (1 << ARM_VMID_SHIFT)
108
109 /* XPRR virtual register map */
110
111 /* Maximum number of CPU windows per-cpu. */
112 #define CPUWINDOWS_MAX 4
113
114
115 #if defined(ARM_LARGE_MEMORY)
116 /*
117 * 2 L1 tables (Linear KVA and V=P), plus 2*16 L2 tables map up to (16*64GB) 1TB of DRAM
118 * Upper limit on how many pages can be consumed by bootstrap page tables
119 */
120 #define BOOTSTRAP_TABLE_SIZE (ARM_PGBYTES * 34)
121 #else /* defined(ARM_LARGE_MEMORY) */
122 #define BOOTSTRAP_TABLE_SIZE (ARM_PGBYTES * 8)
123 #endif /* defined(ARM_LARGE_MEMORY) */
124
125 typedef uint64_t tt_entry_t; /* translation table entry type */
126 typedef uint64_t pt_entry_t; /* page table entry type */
127
128 /* Used to represent a NULL page/translation table entry pointer. */
129 #define PT_ENTRY_NULL ((pt_entry_t *) 0)
130 #define TT_ENTRY_NULL ((tt_entry_t *) 0)
131
132 /**
133 * Number of PTE pointers in a single PVE. This must be 2, since the algorithm
134 * has been optimized to that case. Should this change in the future, both
135 * enter_pv() and remove_pv() will need to be modified accordingly. In addition
136 * to this, the documentation and the LLDB macros that walk PV lists will also
137 * need to be adapted.
138 */
139 #define PTE_PER_PVE 2
140 _Static_assert(PTE_PER_PVE == 2, "PTE_PER_PVE is not 2");
141
142 /**
143 * Structure to track the active mappings for a given page. This structure is
144 * used in the pv_head_table when a physical page has more than one mapping to
145 * it. Each entry in this linked list of structures can represent
146 * up to PTE_PER_PVE mappings.
147 */
148 typedef struct pv_entry {
149 /* Linked list to the next mapping of the physical page. */
150 struct pv_entry *pve_next;
151
152 /* Pointer to the page table entry for this mapping. */
153 pt_entry_t *pve_ptep[PTE_PER_PVE];
154 } pv_entry_t;
155
156 /**
157 * Structure that tracks free pv_entry nodes for the pv_head_table. Each one
158 * of these nodes represents a single mapping to a physical page, so a new node
159 * is allocated whenever a new mapping is created.
160 */
161 typedef struct {
162 pv_entry_t *list;
163 uint32_t count;
164 } pv_free_list_t;
165
166 /**
167 * Forward declaration of the structure that controls page table geometry and
168 * TTE/PTE format.
169 */
170 struct page_table_attr;
171
172 struct pmap_cpu_data {
173 unsigned int cpu_number;
174 bool copywindow_strong_sync[CPUWINDOWS_MAX];
175 pv_free_list_t pv_free;
176 pv_entry_t *pv_free_spill_marker;
177 };
178 typedef struct pmap_cpu_data pmap_cpu_data_t;
179
180 #include <mach/vm_prot.h>
181 #include <mach/vm_statistics.h>
182 #include <mach/machine/vm_param.h>
183 #include <kern/kern_types.h>
184 #include <kern/thread.h>
185 #include <kern/queue.h>
186
187
188 #include <sys/cdefs.h>
189
190 /* Base address for low globals. */
191 #if defined(ARM_LARGE_MEMORY)
192 #define LOW_GLOBAL_BASE_ADDRESS 0xfffffe0000000000ULL
193 #else /* defined(ARM_LARGE_MEMORY) */
194 #define LOW_GLOBAL_BASE_ADDRESS 0xfffffff000000000ULL
195 #endif /* defined(ARM_LARGE_MEMORY) */
196
197 /*
198 * This indicates (roughly) where there is free space for the VM
199 * to use for the heap; this does not need to be precise.
200 */
201 #if defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) || defined(KERNEL_INTEGRITY_PV_CTRR)
202 #if defined(ARM_LARGE_MEMORY)
203 #define KERNEL_PMAP_HEAP_RANGE_START (VM_MIN_KERNEL_AND_KEXT_ADDRESS+ARM_TT_L1_SIZE)
204 #else /* defined(ARM_LARGE_MEMORY) */
205 #define KERNEL_PMAP_HEAP_RANGE_START VM_MIN_KERNEL_AND_KEXT_ADDRESS
206 #endif /* defined(ARM_LARGE_MEMORY) */
207 #else /* defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) || defined(KERNEL_INTEGRITY_PV_CTRR) */
208 #if defined(ARM_LARGE_MEMORY)
209 /* For large memory systems with no KTRR/CTRR such as virtual machines */
210 #define KERNEL_PMAP_HEAP_RANGE_START (VM_MIN_KERNEL_AND_KEXT_ADDRESS+ARM_TT_L1_SIZE)
211 #else
212 #define KERNEL_PMAP_HEAP_RANGE_START LOW_GLOBAL_BASE_ADDRESS
213 #endif
214 #endif /* defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) || defined(KERNEL_INTEGRITY_PV_CTRR) */
215
216 /**
217 * For setups where the VM page size does not match the hardware page size (the
218 * VM page size must be a multiple of the hardware page size), we will need to
219 * determine what the page ratio is.
220 */
221 #define PAGE_RATIO ((1 << PAGE_SHIFT) >> ARM_PGSHIFT)
222 #define TEST_PAGE_RATIO_4 (PAGE_RATIO == 4)
223
224
225
226 /* superpages */
227 #define SUPERPAGE_NBASEPAGES 1 /* No superpages support */
228
229 /* Convert addresses to pages and vice versa. No rounding is used. */
230 #define arm_atop(x) (((vm_map_address_t)(x)) >> ARM_PGSHIFT)
231 #define arm_ptoa(x) (((vm_map_address_t)(x)) << ARM_PGSHIFT)
232
233 /**
234 * Round off or truncate to the nearest page. These will work for either
235 * addresses or counts (i.e. 1 byte rounds to 1 page bytes).
236 */
237 #define arm_round_page(x) ((((vm_map_address_t)(x)) + ARM_PGMASK) & ~ARM_PGMASK)
238 #define arm_trunc_page(x) (((vm_map_address_t)(x)) & ~ARM_PGMASK)
239
240 extern void flush_mmu_tlb_region(vm_offset_t va, unsigned length);
241
242 extern uint64_t get_mmu_control(void);
243 extern uint64_t get_aux_control(void);
244 extern void set_aux_control(uint64_t);
245 extern void set_mmu_ttb(uint64_t);
246 extern void set_mmu_ttb_alternate(uint64_t);
247 extern uint64_t get_tcr(void);
248 extern void set_tcr(uint64_t);
249 extern uint64_t pmap_get_arm64_prot(pmap_t, vm_offset_t);
250
251
252 extern pmap_paddr_t get_mmu_ttb(void);
253 extern pmap_paddr_t mmu_kvtop(vm_offset_t va);
254 extern pmap_paddr_t mmu_kvtop_wpreflight(vm_offset_t va);
255 extern pmap_paddr_t mmu_uvtop(vm_offset_t va);
256
257
258 /* Convert address offset to translation table index */
259 #define ttel0num(a) ((a & ARM_TTE_L0_MASK) >> ARM_TT_L0_SHIFT)
260 #define ttel1num(a) ((a & ARM_TTE_L1_MASK) >> ARM_TT_L1_SHIFT)
261 #define ttel2num(a) ((a & ARM_TTE_L2_MASK) >> ARM_TT_L2_SHIFT)
262
263 #define pa_to_tte(a) ((a) & ARM_TTE_TABLE_MASK)
264 #define tte_to_pa(p) ((p) & ARM_TTE_TABLE_MASK)
265
266 #define pa_to_pte(a) ((a) & ARM_PTE_PAGE_MASK)
267 #define pte_to_pa(p) ((p) & ARM_PTE_PAGE_MASK)
268 #define pte_to_ap(p) (((p) & ARM_PTE_APMASK) >> ARM_PTE_APSHIFT)
269 #define pte_increment_pa(p) ((p) += ptoa(1))
270
271 #define TLBFLUSH_SIZE (ARM_TTE_MAX/((sizeof(unsigned int))*BYTE_SIZE))
272
273
274 #define pmap_cs_log(level, fmt, args...)
275 #define pmap_cs_log_debug(fmt, args...)
276 #define pmap_cs_log_info(fmt, args...)
277 #define pmap_cs_log_error(fmt, args...)
278 #define pmap_cs_log_force(level, fmt, args...)
279
280
281 /**
282 * Wrapper struct that represents a locked entry in the PV head table.
283 * This struct should only be obtained as the return value from pvh_try_lock()
284 * or the pvh_lock* functions.
285 */
286 typedef struct {
287 /* The pv_head_table entry obtained from the lock operation. */
288 uintptr_t pvh;
289 /**
290 * Token obtained from thread_priority_floor_start(), the lock was
291 * placed in sleep mode using pvh_lock_enter_sleep_mode().
292 */
293 thread_pri_floor_t pri_token;
294 /* The index of the locked physical page. */
295 unsigned int pai;
296 } locked_pvh_t;
297
298
299
300 /* Convert translation/page table entry to kernel virtual address. */
301 #define ttetokv(a) (phystokv(tte_to_pa(a)))
302 #define ptetokv(a) (phystokv(pte_to_pa(a)))
303
304 struct pmap {
305 /* Pointer to the root translation table. */
306 tt_entry_t *tte;
307
308 /* Physical page of the root translation table. */
309 pmap_paddr_t ttep;
310
311 /*
312 * The min and max fields represent the lowest and highest addressable VAs
313 * as dictated strictly by the paging hierarchy (root level + root table size)
314 * in conjunction with whether the root table is used with TTBR0, TTBR1, or VTTBR.
315 * These fields do not encapsulate any higher-level address-space partitioning
316 * policies.
317 */
318
319 /* Lowest supported VA (inclusive) */
320 vm_map_address_t min;
321
322 /* Highest supported VA (exclusive) */
323 vm_map_address_t max;
324
325 #if ARM_PARAMETERIZED_PMAP
326 /* Details about the page table layout. */
327 const struct page_table_attr * pmap_pt_attr;
328 #endif /* ARM_PARAMETERIZED_PMAP */
329
330 /* Ledger tracking phys mappings */
331 ledger_t ledger;
332
333 decl_lck_rw_data(, rwlock);
334
335 /* Global list of pmaps */
336 queue_chain_t pmaps;
337
338 /* Information representing the "nested" (shared) region in this pmap. */
339 vm_map_address_t nested_region_addr;
340 vm_map_offset_t nested_region_size;
341 vm_map_offset_t nested_region_true_start;
342 vm_map_offset_t nested_region_true_end;
343 union {
344 struct pmap *nested_pmap;
345 bitmap_t *nested_region_unnested_table_bitmap;
346 };
347
348 /* PMAP reference count */
349 os_ref_atomic_t ref_count;
350
351 union {
352 /**
353 * Represents the address space identifier (ASID) for this pmap.
354 * The value 0 is reserved for the kernel pmap; this field will
355 * also be 0 for nested pmaps as those pmaps are never directly
356 * activated on a CPU. This represents a virtual ASID that
357 * is used to globally identify an address space on
358 * the system. Depending upon hardware configuration, this
359 * identifier may have a 1:1 correspondence with the hardware
360 * ASID.
361 */
362 uint16_t asid;
363
364 /**
365 * Represents the virtual machine identifier (VMID) for this pmap.
366 * The value 0 is reserved.
367 */
368 uint16_t vmid;
369 };
370
371 #if MACH_ASSERT
372 int pmap_pid;
373 char pmap_procname[17];
374 #endif /* MACH_ASSERT */
375
376 bool reserved0;
377
378 bool pmap_vm_map_cs_enforced;
379
380 bool reserved1;
381 unsigned int reserved2;
382 unsigned int reserved3;
383
384 #if defined(CONFIG_ROSETTA)
385 /* Whether the pmap is used for Rosetta. */
386 bool is_rosetta;
387 #else
388 bool reserved4;
389 #endif /* defined(CONFIG_ROSETTA) */
390
391 #if DEVELOPMENT || DEBUG
392 bool footprint_suspended;
393 bool footprint_was_suspended;
394 #endif /* DEVELOPMENT || DEBUG */
395
396 /* Whether the No-Execute functionality is enabled. */
397 bool nx_enabled;
398
399 /* Whether this pmap represents a 64-bit address space. */
400 bool is_64bit;
401
402 #if HAS_APPLE_PAC
403 bool disable_jop;
404 #else
405 bool reserved5;
406 #endif /* HAS_APPLE_PAC */
407
408 bool reserved6;
409
410 #define PMAP_TYPE_USER 0 /* ordinary pmap */
411 #define PMAP_TYPE_KERNEL 1 /* kernel pmap */
412 #define PMAP_TYPE_COMMPAGE 2 /* commpage pmap */
413 #define PMAP_TYPE_NESTED 3 /* pmap nested within another pmap */
414 uint8_t type;
415
416 /*
417 * TrustedExecutionMonitor manages its own address space data structure and
418 * the PMAP is used as the owning structure for keeping this structure.
419 */
420 uint32_t reserved7[4];
421 void *reserved8;
422 uint8_t reserved9;
423
424 /* The ID of the vm_map that this pmap is backing, if any */
425 vm_map_serial_t associated_vm_map_serial_id;
426 };
427
428 #define PMAP_VASID(pmap) ((pmap)->asid)
429 #define PMAP_HWASID(pmap) ((pmap)->asid & (MAX_HW_ASIDS - 1))
430
431 #if VM_DEBUG
432 extern int pmap_list_resident_pages(
433 pmap_t pmap,
434 vm_offset_t *listp,
435 int space);
436 #else /* VM_DEBUG */
437 #define pmap_list_resident_pages(pmap, listp, space) (0)
438 #endif /* VM_DEBUG */
439
440 extern int copysafe(vm_map_address_t from, vm_map_address_t to, uint32_t cnt, int type, uint32_t *bytes_copied);
441
442 /* Globals shared between arm_vm_init and pmap */
443 extern tt_entry_t *cpu_tte; /* First CPUs translation table (shared with kernel pmap) */
444 extern pmap_paddr_t cpu_ttep; /* Physical translation table addr */
445
446 extern void *ropagetable_begin;
447 extern void *ropagetable_end;
448
449
450 extern tt_entry_t *invalid_tte; /* Global invalid translation table */
451 extern pmap_paddr_t invalid_ttep; /* Physical invalid translation table addr */
452
453 #define PMAP_CONTEXT(pmap, thread)
454
455 /**
456 * Platform dependent Prototypes
457 */
458 extern void pmap_clear_user_ttb(void);
459 extern void pmap_bootstrap(vm_offset_t);
460 extern vm_map_address_t pmap_ptov(pmap_t, ppnum_t);
461 extern pmap_paddr_t pmap_find_pa(pmap_t map, addr64_t va);
462 extern pmap_paddr_t pmap_find_pa_nofault(pmap_t map, addr64_t va);
463 extern ppnum_t pmap_find_phys(pmap_t map, addr64_t va);
464 extern ppnum_t pmap_find_phys_nofault(pmap_t map, addr64_t va);
465 extern void pmap_switch_user(thread_t th, vm_map_t map);
466 extern void pmap_set_pmap(pmap_t pmap, thread_t thread);
467 extern void pmap_gc(void);
468 #if HAS_APPLE_PAC
469 extern void * pmap_sign_user_ptr(void *value, ptrauth_key key, uint64_t data, uint64_t jop_key);
470 extern void * pmap_auth_user_ptr(void *value, ptrauth_key key, uint64_t data, uint64_t jop_key);
471 extern bool pmap_batch_sign_user_ptr(void *location, void *value, ptrauth_key key, uint64_t discriminator, uint64_t jop_key);
472 #endif /* HAS_APPLE_PAC */
473
474 /**
475 * Interfaces implemented as macros.
476 */
477
478 #define PMAP_SWITCH_USER(th, new_map, my_cpu) pmap_switch_user((th), (new_map))
479
480 #define pmap_kernel() (kernel_pmap)
481
482 #define pmap_kernel_va(VA) \
483 (((VA) >= VM_MIN_KERNEL_ADDRESS) && ((VA) <= VM_MAX_KERNEL_ADDRESS))
484
485 #define pmap_attribute(pmap, addr, size, attr, value) (KERN_INVALID_ADDRESS)
486
487 #define copyinmsg(from, to, cnt) copyin(from, to, cnt)
488 #define copyoutmsg(from, to, cnt) copyout(from, to, cnt)
489
490 /* Unimplemented interfaces. */
491 #define MACRO_NOOP
492 #define pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr) MACRO_NOOP
493 #define pmap_pageable(pmap, start, end, pageable) MACRO_NOOP
494
495 extern pmap_paddr_t kvtophys(vm_offset_t va);
496 extern pmap_paddr_t kvtophys_nofail(vm_offset_t va);
497 extern vm_map_address_t phystokv(pmap_paddr_t pa);
498 extern vm_map_address_t phystokv_range(pmap_paddr_t pa, vm_size_t *max_len);
499
500 extern vm_map_address_t pmap_map(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot, unsigned int flags);
501 extern vm_map_address_t pmap_map_high_window_bd( vm_offset_t pa, vm_size_t len, vm_prot_t prot);
502 extern kern_return_t pmap_map_block(pmap_t pmap, addr64_t va, ppnum_t pa, uint32_t size, vm_prot_t prot, int attr, unsigned int flags);
503 extern kern_return_t pmap_map_block_addr(pmap_t pmap, addr64_t va, pmap_paddr_t pa, uint32_t size, vm_prot_t prot, int attr, unsigned int flags);
504 extern void pmap_map_globals(void);
505
506 #define PMAP_MAP_BD_DEVICE 0x0
507 #define PMAP_MAP_BD_WCOMB 0x1
508 #define PMAP_MAP_BD_POSTED 0x2
509 #define PMAP_MAP_BD_POSTED_REORDERED 0x3
510 #define PMAP_MAP_BD_POSTED_COMBINED_REORDERED 0x4
511 #define PMAP_MAP_BD_MASK 0x7
512
513 extern vm_map_address_t pmap_map_bd_with_options(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot, int32_t options);
514 extern vm_map_address_t pmap_map_bd(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot);
515
516 extern void pmap_init_pte_page(pmap_t, pt_entry_t *, vm_offset_t, unsigned int ttlevel, boolean_t alloc_ptd);
517
518 extern boolean_t pmap_valid_address(pmap_paddr_t addr);
519 extern void pmap_disable_NX(pmap_t pmap);
520 extern void pmap_set_nested(pmap_t pmap);
521 extern void pmap_create_commpages(vm_map_address_t *kernel_data_addr, vm_map_address_t *kernel_text_addr,
522 vm_map_address_t *kernel_ro_data_addr, vm_map_address_t *user_text_addr);
523 extern void pmap_insert_commpage(pmap_t pmap);
524
525 extern vm_offset_t pmap_cpu_windows_copy_addr(int cpu_num, unsigned int index);
526 extern unsigned int pmap_map_cpu_windows_copy(ppnum_t pn, vm_prot_t prot, unsigned int wimg_bits);
527 extern void pmap_unmap_cpu_windows_copy(unsigned int index);
528
529 extern vm_offset_t pmap_ro_zone_align(vm_offset_t);
530 extern void pmap_ro_zone_memcpy(zone_id_t zid, vm_offset_t va, vm_offset_t offset,
531 vm_offset_t new_data, vm_size_t new_data_size);
532 extern uint64_t pmap_ro_zone_atomic_op(zone_id_t zid, vm_offset_t va, vm_offset_t offset,
533 uint32_t op, uint64_t value);
534 extern void pmap_ro_zone_bzero(zone_id_t zid, vm_offset_t va, vm_offset_t offset, vm_size_t size);
535
536 extern boolean_t pmap_valid_page(ppnum_t pn);
537 extern boolean_t pmap_bootloader_page(ppnum_t pn);
538
539 extern boolean_t pmap_is_empty(pmap_t pmap, vm_map_offset_t start, vm_map_offset_t end);
540
541
542
543 #define ARM_PMAP_MAX_OFFSET_DEFAULT 0x01
544 #define ARM_PMAP_MAX_OFFSET_MIN 0x02
545 #define ARM_PMAP_MAX_OFFSET_MAX 0x04
546 #define ARM_PMAP_MAX_OFFSET_DEVICE 0x08
547 #define ARM_PMAP_MAX_OFFSET_JUMBO 0x10
548 #if XNU_PLATFORM_iPhoneOS && EXTENDED_USER_VA_SUPPORT
549 #define ARM_PMAP_MAX_OFFSET_EXTRA_JUMBO 0x20
550 #endif /* XNU_PLATFORM_iPhoneOS && EXTENDED_USER_VA_SUPPORT */
551
552 extern vm_map_offset_t pmap_max_offset(boolean_t is64, unsigned int option);
553 extern vm_map_offset_t pmap_max_64bit_offset(unsigned int option);
554 extern vm_map_offset_t pmap_max_32bit_offset(unsigned int option);
555
556 boolean_t pmap_virtual_region(unsigned int region_select, vm_map_offset_t *startp, vm_map_size_t *size);
557
558 boolean_t pmap_enforces_execute_only(pmap_t pmap);
559
560 void pmap_abandon_measurement(void);
561
562
563
564 /* pmap dispatch indices */
565 #define ARM_FAST_FAULT_INDEX 0
566 #define ARM_FORCE_FAST_FAULT_INDEX 1
567 #define MAPPING_FREE_PRIME_INDEX 2
568 #define MAPPING_REPLENISH_INDEX 3
569 #define PHYS_ATTRIBUTE_CLEAR_INDEX 4
570 #define PHYS_ATTRIBUTE_SET_INDEX 5
571 #define PMAP_BATCH_SET_CACHE_ATTRIBUTES_INDEX 6
572 #define PMAP_CHANGE_WIRING_INDEX 7
573 #define PMAP_CREATE_INDEX 8
574 #define PMAP_DESTROY_INDEX 9
575 #define PMAP_ENTER_OPTIONS_INDEX 10
576 /* #define PMAP_EXTRACT_INDEX 11 -- Not used*/
577 #define PMAP_FIND_PA_INDEX 12
578 #define PMAP_INSERT_COMMPAGE_INDEX 13
579 #define PMAP_IS_EMPTY_INDEX 14
580 #define PMAP_MAP_CPU_WINDOWS_COPY_INDEX 15
581 #define PMAP_MARK_PAGE_AS_PMAP_PAGE_INDEX 16
582 #define PMAP_NEST_INDEX 17
583 #define PMAP_PAGE_PROTECT_OPTIONS_INDEX 18
584 #define PMAP_PROTECT_OPTIONS_INDEX 19
585 #define PMAP_QUERY_PAGE_INFO_INDEX 20
586 #define PMAP_QUERY_RESIDENT_INDEX 21
587 #define PMAP_REFERENCE_INDEX 22
588 #define PMAP_REMOVE_OPTIONS_INDEX 23
589 #define PMAP_SET_CACHE_ATTRIBUTES_INDEX 25
590 #define PMAP_SET_NESTED_INDEX 26
591 #define PMAP_SET_PROCESS_INDEX 27
592 #define PMAP_SWITCH_INDEX 28
593 #define PMAP_SWITCH_USER_TTB_INDEX 29
594 #define PMAP_CLEAR_USER_TTB_INDEX 30
595 #define PMAP_UNMAP_CPU_WINDOWS_COPY_INDEX 31
596 #define PMAP_UNNEST_OPTIONS_INDEX 32
597 #define PMAP_FOOTPRINT_SUSPEND_INDEX 33
598 #define PMAP_CPU_DATA_INIT_INDEX 34
599 #define PMAP_RELEASE_PAGES_TO_KERNEL_INDEX 35
600 #define PMAP_SET_JIT_ENTITLED_INDEX 36
601
602
603 #define PMAP_UPDATE_COMPRESSOR_PAGE_INDEX 55
604 #define PMAP_TRIM_INDEX 56
605 #define PMAP_LEDGER_VERIFY_SIZE_INDEX 57
606 #define PMAP_LEDGER_ALLOC_INDEX 58
607 #define PMAP_LEDGER_FREE_INDEX 59
608
609 #if HAS_APPLE_PAC
610 #define PMAP_SIGN_USER_PTR 60
611 #define PMAP_AUTH_USER_PTR 61
612 #endif /* HAS_APPLE_PAC */
613
614 #define PHYS_ATTRIBUTE_CLEAR_RANGE_INDEX 66
615
616
617 #if __has_feature(ptrauth_calls) && (defined(XNU_TARGET_OS_OSX) || (DEVELOPMENT || DEBUG))
618 #define PMAP_DISABLE_USER_JOP_INDEX 69
619 #endif /* __has_feature(ptrauth_calls) && (defined(XNU_TARGET_OS_OSX) || (DEVELOPMENT || DEBUG)) */
620
621
622
623 #define PMAP_SET_VM_MAP_CS_ENFORCED_INDEX 72
624
625 #define PMAP_SET_COMPILATION_SERVICE_CDHASH_INDEX 73
626 #define PMAP_MATCH_COMPILATION_SERVICE_CDHASH_INDEX 74
627 #define PMAP_NOP_INDEX 75
628
629 #define PMAP_RO_ZONE_MEMCPY_INDEX 76
630 #define PMAP_RO_ZONE_ATOMIC_OP_INDEX 77
631
632 #if DEVELOPMENT || DEBUG
633 #define PMAP_TEST_TEXT_CORRUPTION_INDEX 79
634 #endif /* DEVELOPMENT || DEBUG */
635
636
637
638 #define PMAP_SET_LOCAL_SIGNING_PUBLIC_KEY_INDEX 84
639 #define PMAP_UNRESTRICT_LOCAL_SIGNING_INDEX 85
640
641
642
643 #define PMAP_RO_ZONE_BZERO_INDEX 90
644
645
646
647
648 #define PMAP_SET_TPRO_INDEX 98
649
650 #define PMAP_COUNT 99
651
652 /**
653 * Value used when initializing pmap per-cpu data to denote that the structure
654 * hasn't been initialized with its associated CPU number yet.
655 */
656 #define PMAP_INVALID_CPU_NUM (~0U)
657
658 /**
659 * Align the pmap per-cpu data to the L2 cache size for each individual CPU's
660 * data. This prevents accesses from one CPU affecting another, especially
661 * when atomically updating fields.
662 */
663 struct pmap_cpu_data_array_entry {
664 pmap_cpu_data_t cpu_data;
665 } __attribute__((aligned(MAX_L2_CLINE_BYTES)));
666
667 /* Initialize the pmap per-CPU data for the current CPU. */
668 extern void pmap_cpu_data_init(void);
669
670 /* Get the pmap per-CPU data for the current CPU. */
671 extern pmap_cpu_data_t *pmap_get_cpu_data(void);
672
673 /* Get the pmap per-CPU data for an arbitrary CPU. */
674 extern pmap_cpu_data_t *pmap_get_remote_cpu_data(unsigned int cpu);
675
676 /*
677 * For long-running PV list operations, we pick a reasonable maximum chunk size
678 * beyond which we will exit to preemptible context to avoid excessive preemption
679 * latency and PVH lock timeouts.
680 */
681 #define PMAP_MAX_PV_LIST_CHUNK_SIZE 64
682
683 /*
684 * For most batched page operations, we pick a sane default page count
685 * interval at which to check for pending preemption and exit the PPL if found.
686 */
687 #define PMAP_DEFAULT_PREEMPTION_CHECK_PAGE_INTERVAL 64
688
689 static inline bool
_pmap_pending_preemption_real(void)690 _pmap_pending_preemption_real(void)
691 {
692 return !!(*((volatile ast_t*)ast_pending()) & AST_URGENT);
693 }
694
695 #if SCHED_HYGIENE_DEBUG && (DEBUG || DEVELOPMENT)
696 bool pmap_pending_preemption(void); // more complicated, so externally defined
697 #else /* SCHED_HYGIENE_DEBUG && (DEBUG || DEVELOPMENT) */
698 #define pmap_pending_preemption _pmap_pending_preemption_real
699 #endif /* SCHED_HYGIENE_DEBUG && (DEBUG || DEVELOPMENT) */
700
701 #define MARK_AS_PMAP_TEXT
702 #define MARK_AS_PMAP_DATA
703 #define MARK_AS_PMAP_RODATA
704
705 extern void pmap_nop(pmap_t);
706
707 extern lck_grp_t pmap_lck_grp;
708
709 extern void CleanPoC_DcacheRegion_Force_nopreempt_nohid_nobarrier(vm_offset_t va, size_t length);
710
711 #define pmap_force_dcache_clean(va, sz) CleanPoC_DcacheRegion_Force(va, sz)
712 #define pmap_simple_lock(l) simple_lock(l, &pmap_lck_grp)
713 #define pmap_simple_unlock(l) simple_unlock(l)
714 #define pmap_simple_lock_try(l) simple_lock_try(l, &pmap_lck_grp)
715 #define pmap_simple_lock_assert(l, t) simple_lock_assert(l, t)
716
717 #if DEVELOPMENT || DEBUG
718 extern kern_return_t pmap_test_text_corruption(pmap_paddr_t);
719 #endif /* DEVELOPMENT || DEBUG */
720
721 /* Check if a page has any mappings. */
722 extern bool pmap_is_page_free(pmap_paddr_t paddr);
723
724 #endif /* #ifndef ASSEMBLER */
725
726 #if __ARM_KERNEL_PROTECT__
727 /*
728 * The exception vector mappings start at the middle of the kernel page table
729 * range (so that the EL0 mapping can be located at the base of the range).
730 */
731 #define ARM_KERNEL_PROTECT_EXCEPTION_START ((~((ARM_TT_ROOT_SIZE + ARM_TT_ROOT_INDEX_MASK) / 2ULL)) + 1ULL)
732 #endif /* __ARM_KERNEL_PROTECT__ */
733
734 #endif /* #ifndef _ARM_PMAP_H_ */
735