1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2012 by Delphix. All rights reserved. 25 * Copyright 2014 Igor Kozhukhov <ikozhukhov@gmail.com>. 26 * Copyright 2018 Joyent, Inc. 27 * Copyright 2017 RackTop Systems. 28 * Copyright 2019 Joyent, Inc. 29 */ 30 31 #ifndef _SYS_CPUVAR_H 32 #define _SYS_CPUVAR_H 33 34 #include <sys/thread.h> 35 #include <sys/sysinfo.h> /* has cpu_stat_t definition */ 36 #include <sys/disp.h> 37 #include <sys/processor.h> 38 #include <sys/kcpc.h> /* has kcpc_ctx_t definition */ 39 40 #include <sys/loadavg.h> 41 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) 42 #include <sys/machcpuvar.h> 43 #endif 44 45 #include <sys/types.h> 46 #include <sys/file.h> 47 #include <sys/bitmap.h> 48 #include <sys/rwlock.h> 49 #include <sys/msacct.h> 50 #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) && \ 51 (defined(__i386) || defined(__amd64)) 52 #include <asm/cpuvar.h> 53 #endif 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 struct squeue_set_s; 60 61 #define CPU_CACHE_COHERENCE_SIZE 64 62 63 /* 64 * For fast event tracing. 65 */ 66 struct ftrace_record; 67 typedef struct ftrace_data { 68 int ftd_state; /* ftrace flags */ 69 kmutex_t ftd_unused; /* ftrace buffer lock, unused */ 70 struct ftrace_record *ftd_cur; /* current record */ 71 struct ftrace_record *ftd_first; /* first record */ 72 struct ftrace_record *ftd_last; /* last record */ 73 } ftrace_data_t; 74 75 struct cyc_cpu; 76 struct nvlist; 77 78 /* 79 * Per-CPU data. 80 * 81 * Be careful adding new members: if they are not the same in all modules (e.g. 82 * change size depending on a #define), CTF uniquification can fail to work 83 * properly. Furthermore, this is transitive in that it applies recursively to 84 * all types pointed to by cpu_t. 85 */ 86 typedef struct cpu { 87 processorid_t cpu_id; /* CPU number */ 88 processorid_t cpu_seqid; /* sequential CPU id (0..ncpus-1) */ 89 volatile cpu_flag_t cpu_flags; /* flags indicating CPU state */ 90 struct cpu *cpu_self; /* pointer to itself */ 91 kthread_t *cpu_thread; /* current thread */ 92 kthread_t *cpu_idle_thread; /* idle thread for this CPU */ 93 kthread_t *cpu_pause_thread; /* pause thread for this CPU */ 94 klwp_id_t cpu_lwp; /* current lwp (if any) */ 95 klwp_id_t cpu_fpowner; /* currently loaded fpu owner */ 96 struct cpupart *cpu_part; /* partition with this CPU */ 97 struct lgrp_ld *cpu_lpl; /* pointer to this cpu's load */ 98 int cpu_cache_offset; /* see kmem.c for details */ 99 100 /* 101 * Links to other CPUs. It is safe to walk these lists if 102 * one of the following is true: 103 * - cpu_lock held 104 * - preemption disabled via kpreempt_disable 105 * - PIL >= DISP_LEVEL 106 * - acting thread is an interrupt thread 107 * - all other CPUs are paused 108 */ 109 struct cpu *cpu_next; /* next existing CPU */ 110 struct cpu *cpu_prev; /* prev existing CPU */ 111 struct cpu *cpu_next_onln; /* next online (enabled) CPU */ 112 struct cpu *cpu_prev_onln; /* prev online (enabled) CPU */ 113 struct cpu *cpu_next_part; /* next CPU in partition */ 114 struct cpu *cpu_prev_part; /* prev CPU in partition */ 115 struct cpu *cpu_next_lgrp; /* next CPU in latency group */ 116 struct cpu *cpu_prev_lgrp; /* prev CPU in latency group */ 117 struct cpu *cpu_next_lpl; /* next CPU in lgrp partition */ 118 struct cpu *cpu_prev_lpl; 119 120 struct cpu_pg *cpu_pg; /* cpu's processor groups */ 121 122 void *cpu_reserved[4]; /* reserved for future use */ 123 124 /* 125 * Scheduling variables. 126 */ 127 disp_t *cpu_disp; /* dispatch queue data */ 128 /* 129 * Note that cpu_disp is set before the CPU is added to the system 130 * and is never modified. Hence, no additional locking is needed 131 * beyond what's necessary to access the cpu_t structure. 132 */ 133 char cpu_runrun; /* scheduling flag - set to preempt */ 134 char cpu_kprunrun; /* force kernel preemption */ 135 pri_t cpu_chosen_level; /* priority at which cpu */ 136 /* was chosen for scheduling */ 137 kthread_t *cpu_dispthread; /* thread selected for dispatch */ 138 disp_lock_t cpu_thread_lock; /* dispatcher lock on current thread */ 139 uint8_t cpu_disp_flags; /* flags used by dispatcher */ 140 /* 141 * The following field is updated when ever the cpu_dispthread 142 * changes. Also in places, where the current thread(cpu_dispthread) 143 * priority changes. This is used in disp_lowpri_cpu() 144 */ 145 pri_t cpu_dispatch_pri; /* priority of cpu_dispthread */ 146 clock_t cpu_last_swtch; /* last time switched to new thread */ 147 148 /* 149 * Interrupt data. 150 */ 151 caddr_t cpu_intr_stack; /* interrupt stack */ 152 kthread_t *cpu_intr_thread; /* interrupt thread list */ 153 uint_t cpu_intr_actv; /* interrupt levels active (bitmask) */ 154 int cpu_base_spl; /* priority for highest rupt active */ 155 156 /* 157 * Statistics. 158 */ 159 cpu_stats_t cpu_stats; /* per-CPU statistics */ 160 struct kstat *cpu_info_kstat; /* kstat for cpu info */ 161 162 uintptr_t cpu_profile_pc; /* kernel PC in profile interrupt */ 163 uintptr_t cpu_profile_upc; /* user PC in profile interrupt */ 164 uintptr_t cpu_profile_pil; /* PIL when profile interrupted */ 165 166 ftrace_data_t cpu_ftrace; /* per cpu ftrace data */ 167 168 clock_t cpu_deadman_counter; /* used by deadman() */ 169 uint_t cpu_deadman_countdown; /* used by deadman() */ 170 171 kmutex_t cpu_cpc_ctxlock; /* protects context for idle thread */ 172 kcpc_ctx_t *cpu_cpc_ctx; /* performance counter context */ 173 174 /* 175 * Configuration information for the processor_info system call. 176 */ 177 processor_info_t cpu_type_info; /* config info */ 178 time_t cpu_state_begin; /* when CPU entered current state */ 179 char cpu_cpr_flags; /* CPR related info */ 180 struct cyc_cpu *cpu_cyclic; /* per cpu cyclic subsystem data */ 181 struct squeue_set_s *cpu_squeue_set; /* per cpu squeue set */ 182 struct nvlist *cpu_props; /* pool-related properties */ 183 184 krwlock_t cpu_ft_lock; /* DTrace: fasttrap lock */ 185 uintptr_t cpu_dtrace_caller; /* DTrace: caller, if any */ 186 hrtime_t cpu_dtrace_chillmark; /* DTrace: chill mark time */ 187 hrtime_t cpu_dtrace_chilled; /* DTrace: total chill time */ 188 uint64_t cpu_dtrace_probes; /* DTrace: total probes fired */ 189 hrtime_t cpu_dtrace_nsec; /* DTrace: ns in dtrace_probe */ 190 191 volatile uint16_t cpu_mstate; /* cpu microstate */ 192 volatile uint16_t cpu_mstate_gen; /* generation counter */ 193 volatile hrtime_t cpu_mstate_start; /* cpu microstate start time */ 194 volatile hrtime_t cpu_acct[NCMSTATES]; /* cpu microstate data */ 195 hrtime_t cpu_intracct[NCMSTATES]; /* interrupt mstate data */ 196 hrtime_t cpu_waitrq; /* cpu run-queue wait time */ 197 struct loadavg_s cpu_loadavg; /* loadavg info for this cpu */ 198 199 char *cpu_idstr; /* for printing and debugging */ 200 char *cpu_brandstr; /* for printing */ 201 202 /* 203 * Sum of all device interrupt weights that are currently directed at 204 * this cpu. Cleared at start of interrupt redistribution. 205 */ 206 int32_t cpu_intr_weight; 207 void *cpu_vm_data; 208 209 struct cpu_physid *cpu_physid; /* physical associations */ 210 211 uint64_t cpu_curr_clock; /* current clock freq in Hz */ 212 char *cpu_supp_freqs; /* supported freqs in Hz */ 213 214 uintptr_t cpu_cpcprofile_pc; /* kernel PC in cpc interrupt */ 215 uintptr_t cpu_cpcprofile_upc; /* user PC in cpc interrupt */ 216 217 /* 218 * Interrupt load factor used by dispatcher & softcall 219 */ 220 hrtime_t cpu_intrlast; /* total interrupt time (nsec) */ 221 int cpu_intrload; /* interrupt load factor (0-99%) */ 222 223 uint_t cpu_rotor; /* for cheap pseudo-random numbers */ 224 225 struct cu_cpu_info *cpu_cu_info; /* capacity & util. info */ 226 227 /* 228 * cpu_generation is updated whenever CPU goes on-line or off-line. 229 * Updates to cpu_generation are protected by cpu_lock. 230 * 231 * See CPU_NEW_GENERATION() macro below. 232 */ 233 volatile uint_t cpu_generation; /* tracking on/off-line */ 234 235 /* 236 * New members must be added /before/ this member, as the CTF tools 237 * rely on this being the last field before cpu_m, so they can 238 * correctly calculate the offset when synthetically adding the cpu_m 239 * member in objects that do not have it. This fixup is required for 240 * uniquification to work correctly. 241 */ 242 uintptr_t cpu_m_pad; 243 244 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) 245 struct machcpu cpu_m; /* per architecture info */ 246 #endif 247 } cpu_t; 248 249 /* 250 * The cpu_core structure consists of per-CPU state available in any context. 251 * On some architectures, this may mean that the page(s) containing the 252 * NCPU-sized array of cpu_core structures must be locked in the TLB -- it 253 * is up to the platform to assure that this is performed properly. Note that 254 * the structure is sized to avoid false sharing. 255 */ 256 #define CPUC_SIZE (sizeof (uint16_t) + sizeof (uint8_t) + \ 257 sizeof (uintptr_t) + sizeof (kmutex_t)) 258 #define CPUC_PADSIZE CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE 259 260 typedef struct cpu_core { 261 uint16_t cpuc_dtrace_flags; /* DTrace flags */ 262 uint8_t cpuc_dcpc_intr_state; /* DCPC provider intr state */ 263 uint8_t cpuc_pad[CPUC_PADSIZE]; /* padding */ 264 uintptr_t cpuc_dtrace_illval; /* DTrace illegal value */ 265 kmutex_t cpuc_pid_lock; /* DTrace pid provider lock */ 266 } cpu_core_t; 267 268 #ifdef _KERNEL 269 extern cpu_core_t cpu_core[]; 270 #endif /* _KERNEL */ 271 272 /* 273 * CPU_ON_INTR() macro. Returns non-zero if currently on interrupt stack. 274 * Note that this isn't a test for a high PIL. For example, cpu_intr_actv 275 * does not get updated when we go through sys_trap from TL>0 at high PIL. 276 * getpil() should be used instead to check for PIL levels. 277 */ 278 #define CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1)) 279 280 /* 281 * Check to see if an interrupt thread might be active at a given ipl. 282 * If so return true. 283 * We must be conservative--it is ok to give a false yes, but a false no 284 * will cause disaster. (But if the situation changes after we check it is 285 * ok--the caller is trying to ensure that an interrupt routine has been 286 * exited). 287 * This is used when trying to remove an interrupt handler from an autovector 288 * list in avintr.c. 289 */ 290 #define INTR_ACTIVE(cpup, level) \ 291 ((level) <= LOCK_LEVEL ? \ 292 ((cpup)->cpu_intr_actv & (1 << (level))) : (CPU_ON_INTR(cpup))) 293 294 /* 295 * CPU_PSEUDO_RANDOM() returns a per CPU value that changes each time one 296 * looks at it. It's meant as a cheap mechanism to be incorporated in routines 297 * wanting to avoid biasing, but where true randomness isn't needed (just 298 * something that changes). 299 */ 300 #define CPU_PSEUDO_RANDOM() (CPU->cpu_rotor++) 301 302 #if defined(_KERNEL) || defined(_KMEMUSER) || defined(_BOOT) 303 304 #define INTR_STACK_SIZE MAX(DEFAULTSTKSZ, PAGESIZE) 305 306 /* MEMBERS PROTECTED BY "atomicity": cpu_flags */ 307 308 /* 309 * Flags in the CPU structure. 310 * 311 * These are protected by cpu_lock (except during creation). 312 * 313 * Offlined-CPUs have three stages of being offline: 314 * 315 * CPU_ENABLE indicates that the CPU is participating in I/O interrupts 316 * that can be directed at a number of different CPUs. If CPU_ENABLE 317 * is off, the CPU will not be given interrupts that can be sent elsewhere, 318 * but will still get interrupts from devices associated with that CPU only, 319 * and from other CPUs. 320 * 321 * CPU_OFFLINE indicates that the dispatcher should not allow any threads 322 * other than interrupt threads to run on that CPU. A CPU will not have 323 * CPU_OFFLINE set if there are any bound threads (besides interrupts). 324 * 325 * CPU_QUIESCED is set if p_offline was able to completely turn idle the 326 * CPU and it will not have to run interrupt threads. In this case it'll 327 * stay in the idle loop until CPU_QUIESCED is turned off. 328 * 329 * CPU_FROZEN is used only by CPR to mark CPUs that have been successfully 330 * suspended (in the suspend path), or have yet to be resumed (in the resume 331 * case). 332 * 333 * CPU_DISABLED is used for disabling SMT. It is similar to CPU_OFFLINE, but 334 * cannot be onlined without being forced. 335 * 336 * On some platforms CPUs can be individually powered off. 337 * The following flags are set for powered off CPUs: CPU_QUIESCED, 338 * CPU_OFFLINE, and CPU_POWEROFF. The following flags are cleared: 339 * CPU_RUNNING, CPU_READY, CPU_EXISTS, CPU_DISABLED and CPU_ENABLE. 340 */ 341 #define CPU_RUNNING 0x001 /* CPU running */ 342 #define CPU_READY 0x002 /* CPU ready for cross-calls */ 343 #define CPU_QUIESCED 0x004 /* CPU will stay in idle */ 344 #define CPU_EXISTS 0x008 /* CPU is configured */ 345 #define CPU_ENABLE 0x010 /* CPU enabled for interrupts */ 346 #define CPU_OFFLINE 0x020 /* CPU offline via p_online */ 347 #define CPU_POWEROFF 0x040 /* CPU is powered off */ 348 #define CPU_FROZEN 0x080 /* CPU is frozen via CPR suspend */ 349 #define CPU_SPARE 0x100 /* CPU offline available for use */ 350 #define CPU_FAULTED 0x200 /* CPU offline diagnosed faulty */ 351 #define CPU_DISABLED 0x400 /* CPU explicitly disabled (HT) */ 352 353 #define CPU_ACTIVE(cpu) (((cpu)->cpu_flags & CPU_OFFLINE) == 0) 354 355 /* 356 * Flags for cpu_offline(), cpu_faulted(), and cpu_spare(). 357 */ 358 #define CPU_FORCED 0x0001 /* Force CPU offline */ 359 360 /* 361 * DTrace flags. 362 */ 363 #define CPU_DTRACE_NOFAULT 0x0001 /* Don't fault */ 364 #define CPU_DTRACE_DROP 0x0002 /* Drop this ECB */ 365 #define CPU_DTRACE_BADADDR 0x0004 /* DTrace fault: bad address */ 366 #define CPU_DTRACE_BADALIGN 0x0008 /* DTrace fault: bad alignment */ 367 #define CPU_DTRACE_DIVZERO 0x0010 /* DTrace fault: divide by zero */ 368 #define CPU_DTRACE_ILLOP 0x0020 /* DTrace fault: illegal operation */ 369 #define CPU_DTRACE_NOSCRATCH 0x0040 /* DTrace fault: out of scratch */ 370 #define CPU_DTRACE_KPRIV 0x0080 /* DTrace fault: bad kernel access */ 371 #define CPU_DTRACE_UPRIV 0x0100 /* DTrace fault: bad user access */ 372 #define CPU_DTRACE_TUPOFLOW 0x0200 /* DTrace fault: tuple stack overflow */ 373 #if defined(__sparc) 374 #define CPU_DTRACE_FAKERESTORE 0x0400 /* pid provider hint to getreg */ 375 #endif 376 #define CPU_DTRACE_ENTRY 0x0800 /* pid provider hint to ustack() */ 377 #define CPU_DTRACE_BADSTACK 0x1000 /* DTrace fault: bad stack */ 378 379 #define CPU_DTRACE_FAULT (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \ 380 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \ 381 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \ 382 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \ 383 CPU_DTRACE_BADSTACK) 384 #define CPU_DTRACE_ERROR (CPU_DTRACE_FAULT | CPU_DTRACE_DROP) 385 386 /* 387 * Dispatcher flags 388 * These flags must be changed only by the current CPU. 389 */ 390 #define CPU_DISP_DONTSTEAL 0x01 /* CPU undergoing context swtch */ 391 #define CPU_DISP_HALTED 0x02 /* CPU halted waiting for interrupt */ 392 393 /* 394 * Macros for manipulating sets of CPUs as a bitmap. Note that this 395 * bitmap may vary in size depending on the maximum CPU id a specific 396 * platform supports. This may be different than the number of CPUs 397 * the platform supports, since CPU ids can be sparse. We define two 398 * sets of macros; one for platforms where the maximum CPU id is less 399 * than the number of bits in a single word (32 in a 32-bit kernel, 400 * 64 in a 64-bit kernel), and one for platforms that require bitmaps 401 * of more than one word. 402 */ 403 404 #define CPUSET_WORDS BT_BITOUL(NCPU) 405 #define CPUSET_NOTINSET ((uint_t)-1) 406 407 #if defined(_MACHDEP) 408 struct cpuset { 409 ulong_t cpub[CPUSET_WORDS]; 410 }; 411 #else 412 struct cpuset; 413 #endif 414 415 typedef struct cpuset cpuset_t; 416 417 extern cpuset_t *cpuset_alloc(int); 418 extern void cpuset_free(cpuset_t *); 419 420 /* 421 * Functions for manipulating cpusets. These were previously considered 422 * private when some cpuset_t handling was performed in the CPUSET_* macros. 423 * They are now acceptable to use in non-_MACHDEP code. 424 */ 425 extern void cpuset_all(cpuset_t *); 426 extern void cpuset_all_but(cpuset_t *, const uint_t); 427 extern int cpuset_isnull(const cpuset_t *); 428 extern int cpuset_isequal(const cpuset_t *, const cpuset_t *); 429 extern void cpuset_only(cpuset_t *, const uint_t); 430 extern long cpu_in_set(const cpuset_t *, const uint_t); 431 extern void cpuset_add(cpuset_t *, const uint_t); 432 extern void cpuset_del(cpuset_t *, const uint_t); 433 extern uint_t cpuset_find(const cpuset_t *); 434 extern void cpuset_bounds(const cpuset_t *, uint_t *, uint_t *); 435 extern void cpuset_atomic_del(cpuset_t *, const uint_t); 436 extern void cpuset_atomic_add(cpuset_t *, const uint_t); 437 extern long cpuset_atomic_xadd(cpuset_t *, const uint_t); 438 extern long cpuset_atomic_xdel(cpuset_t *, const uint_t); 439 extern void cpuset_or(cpuset_t *, cpuset_t *); 440 extern void cpuset_xor(cpuset_t *, cpuset_t *); 441 extern void cpuset_and(cpuset_t *, cpuset_t *); 442 extern void cpuset_zero(cpuset_t *); 443 444 445 #if defined(_MACHDEP) 446 447 /* 448 * Prior to the cpuset_t restructuring, the CPUSET_* macros contained 449 * significant logic, rather than directly invoking the backend functions. 450 * They are maintained here so that existing _MACHDEP code can use them. 451 */ 452 453 #define CPUSET_ALL(set) cpuset_all(&(set)) 454 #define CPUSET_ALL_BUT(set, cpu) cpuset_all_but(&(set), cpu) 455 #define CPUSET_ONLY(set, cpu) cpuset_only(&(set), cpu) 456 #define CPU_IN_SET(set, cpu) cpu_in_set(&(set), cpu) 457 #define CPUSET_ADD(set, cpu) cpuset_add(&(set), cpu) 458 #define CPUSET_DEL(set, cpu) cpuset_del(&(set), cpu) 459 #define CPUSET_ISNULL(set) cpuset_isnull(&(set)) 460 #define CPUSET_ISEQUAL(set1, set2) cpuset_isequal(&(set1), &(set2)) 461 462 /* 463 * Find one CPU in the cpuset. 464 * Sets "cpu" to the id of the found CPU, or CPUSET_NOTINSET if no cpu 465 * could be found. (i.e. empty set) 466 */ 467 #define CPUSET_FIND(set, cpu) { \ 468 cpu = cpuset_find(&(set)); \ 469 } 470 471 /* 472 * Determine the smallest and largest CPU id in the set. Returns 473 * CPUSET_NOTINSET in smallest and largest when set is empty. 474 */ 475 #define CPUSET_BOUNDS(set, smallest, largest) { \ 476 cpuset_bounds(&(set), &(smallest), &(largest)); \ 477 } 478 479 /* 480 * Atomic cpuset operations 481 * These are safe to use for concurrent cpuset manipulations. 482 * "xdel" and "xadd" are exclusive operations, that set "result" to "0" 483 * if the add or del was successful, or "-1" if not successful. 484 * (e.g. attempting to add a cpu to a cpuset that's already there, or 485 * deleting a cpu that's not in the cpuset) 486 */ 487 488 #define CPUSET_ATOMIC_DEL(set, cpu) cpuset_atomic_del(&(set), cpu) 489 #define CPUSET_ATOMIC_ADD(set, cpu) cpuset_atomic_add(&(set), cpu) 490 491 #define CPUSET_ATOMIC_XADD(set, cpu, result) \ 492 (result) = cpuset_atomic_xadd(&(set), cpu) 493 494 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \ 495 (result) = cpuset_atomic_xdel(&(set), cpu) 496 497 #define CPUSET_OR(set1, set2) cpuset_or(&(set1), &(set2)) 498 499 #define CPUSET_XOR(set1, set2) cpuset_xor(&(set1), &(set2)) 500 501 #define CPUSET_AND(set1, set2) cpuset_and(&(set1), &(set2)) 502 503 #define CPUSET_ZERO(set) cpuset_zero(&(set)) 504 505 #endif /* defined(_MACHDEP) */ 506 507 508 extern cpuset_t cpu_seqid_inuse; 509 510 extern struct cpu *cpu[]; /* indexed by CPU number */ 511 extern struct cpu **cpu_seq; /* indexed by sequential CPU id */ 512 extern cpu_t *cpu_list; /* list of CPUs */ 513 extern cpu_t *cpu_active; /* list of active CPUs */ 514 extern cpuset_t cpu_active_set; /* cached set of active CPUs */ 515 extern int ncpus; /* number of CPUs present */ 516 extern int ncpus_online; /* number of CPUs not quiesced */ 517 extern int ncpus_intr_enabled; /* nr of CPUs taking I/O intrs */ 518 extern int max_ncpus; /* max present before ncpus is known */ 519 extern int boot_max_ncpus; /* like max_ncpus but for real */ 520 extern int boot_ncpus; /* # cpus present @ boot */ 521 extern processorid_t max_cpuid; /* maximum CPU number */ 522 extern struct cpu *cpu_inmotion; /* offline or partition move target */ 523 extern cpu_t *clock_cpu_list; 524 extern processorid_t max_cpu_seqid_ever; /* maximum seqid ever given */ 525 526 #if defined(__i386) || defined(__amd64) 527 extern struct cpu *curcpup(void); 528 #define CPU (curcpup()) /* Pointer to current CPU */ 529 #else 530 #define CPU (curthread->t_cpu) /* Pointer to current CPU */ 531 #endif 532 533 /* 534 * CPU_CURRENT indicates to thread_affinity_set() to use whatever curthread's 535 * current CPU is; holding cpu_lock is not required. 536 */ 537 #define CPU_CURRENT -3 538 539 /* 540 * CPU_BEST can be used by thread_affinity_set() callers to set affinity to a 541 * good CPU (in particular, an ht_acquire()-friendly choice); holding cpu_lock 542 * is not required. 543 */ 544 #define CPU_BEST -4 545 546 /* 547 * Per-CPU statistics 548 * 549 * cpu_stats_t contains numerous system and VM-related statistics, in the form 550 * of gauges or monotonically-increasing event occurrence counts. 551 */ 552 553 #define CPU_STATS_ENTER_K() kpreempt_disable() 554 #define CPU_STATS_EXIT_K() kpreempt_enable() 555 556 #define CPU_STATS_ADD_K(class, stat, amount) \ 557 { kpreempt_disable(); /* keep from switching CPUs */\ 558 CPU_STATS_ADDQ(CPU, class, stat, amount); \ 559 kpreempt_enable(); \ 560 } 561 562 #define CPU_STATS_ADDQ(cp, class, stat, amount) { \ 563 extern void __dtrace_probe___cpu_##class##info_##stat(uint_t, \ 564 uint64_t *, cpu_t *); \ 565 uint64_t *stataddr = &((cp)->cpu_stats.class.stat); \ 566 __dtrace_probe___cpu_##class##info_##stat((amount), \ 567 stataddr, cp); \ 568 *(stataddr) += (amount); \ 569 } 570 571 #define CPU_STATS(cp, stat) \ 572 ((cp)->cpu_stats.stat) 573 574 /* 575 * Increment CPU generation value. 576 * This macro should be called whenever CPU goes on-line or off-line. 577 * Updates to cpu_generation should be protected by cpu_lock. 578 */ 579 #define CPU_NEW_GENERATION(cp) ((cp)->cpu_generation++) 580 581 #endif /* defined(_KERNEL) || defined(_KMEMUSER) */ 582 583 #define CPU_CPR_OFFLINE 0x0 584 #define CPU_CPR_ONLINE 0x1 585 #define CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0) 586 #define CPU_CPR_IS_ONLINE(cpu) ((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) 587 #define CPU_SET_CPR_FLAGS(cpu, flag) ((cpu)->cpu_cpr_flags |= flag) 588 589 /* 590 * CPU support routines (not for genassym.c) 591 */ 592 #if (defined(_KERNEL) || defined(_FAKE_KERNEL)) && defined(__STDC__) 593 594 struct zone; 595 596 void cpu_list_init(cpu_t *); 597 void cpu_add_unit(cpu_t *); 598 void cpu_del_unit(int cpuid); 599 void cpu_add_active(cpu_t *); 600 void cpu_kstat_init(cpu_t *); 601 void cpu_visibility_add(cpu_t *, struct zone *); 602 void cpu_visibility_remove(cpu_t *, struct zone *); 603 void cpu_visibility_configure(cpu_t *, struct zone *); 604 void cpu_visibility_unconfigure(cpu_t *, struct zone *); 605 void cpu_visibility_online(cpu_t *, struct zone *); 606 void cpu_visibility_offline(cpu_t *, struct zone *); 607 void cpu_create_intrstat(cpu_t *); 608 void cpu_delete_intrstat(cpu_t *); 609 int cpu_kstat_intrstat_update(kstat_t *, int); 610 void cpu_intr_swtch_enter(kthread_t *); 611 void cpu_intr_swtch_exit(kthread_t *); 612 613 void mbox_lock_init(void); /* initialize cross-call locks */ 614 void mbox_init(int cpun); /* initialize cross-calls */ 615 void poke_cpu(int cpun); /* interrupt another CPU (to preempt) */ 616 617 /* 618 * values for safe_list. Pause state that CPUs are in. 619 */ 620 #define PAUSE_IDLE 0 /* normal state */ 621 #define PAUSE_READY 1 /* paused thread ready to spl */ 622 #define PAUSE_WAIT 2 /* paused thread is spl-ed high */ 623 #define PAUSE_DIE 3 /* tell pause thread to leave */ 624 #define PAUSE_DEAD 4 /* pause thread has left */ 625 626 void mach_cpu_pause(volatile char *); 627 628 void pause_cpus(cpu_t *off_cp, void *(*func)(void *)); 629 void start_cpus(void); 630 int cpus_paused(void); 631 632 void cpu_pause_init(void); 633 cpu_t *cpu_get(processorid_t cpun); /* get the CPU struct associated */ 634 635 int cpu_online(cpu_t *, int); /* take cpu online */ 636 int cpu_offline(cpu_t *, int); /* take cpu offline */ 637 int cpu_spare(cpu_t *, int); /* take cpu to spare */ 638 int cpu_faulted(cpu_t *, int); /* take cpu to faulted */ 639 int cpu_poweron(cpu_t *); /* take powered-off cpu to offline */ 640 int cpu_poweroff(cpu_t *); /* take offline cpu to powered-off */ 641 642 cpu_t *cpu_intr_next(cpu_t *cp); /* get next online CPU taking intrs */ 643 int cpu_intr_count(cpu_t *cp); /* count # of CPUs handling intrs */ 644 int cpu_intr_on(cpu_t *cp); /* CPU taking I/O interrupts? */ 645 void cpu_intr_enable(cpu_t *cp); /* enable I/O interrupts */ 646 int cpu_intr_disable(cpu_t *cp); /* disable I/O interrupts */ 647 void cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */ 648 649 /* 650 * Routines for checking CPU states. 651 */ 652 int cpu_is_online(cpu_t *); /* check if CPU is online */ 653 int cpu_is_nointr(cpu_t *); /* check if CPU can service intrs */ 654 int cpu_is_active(cpu_t *); /* check if CPU can run threads */ 655 int cpu_is_offline(cpu_t *); /* check if CPU is offline */ 656 int cpu_is_poweredoff(cpu_t *); /* check if CPU is powered off */ 657 658 int cpu_flagged_online(cpu_flag_t); /* flags show CPU is online */ 659 int cpu_flagged_nointr(cpu_flag_t); /* flags show CPU not handling intrs */ 660 int cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */ 661 int cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */ 662 int cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */ 663 664 /* 665 * The processor_info(2) state of a CPU is a simplified representation suitable 666 * for use by an application program. Kernel subsystems should utilize the 667 * internal per-CPU state as given by the cpu_flags member of the cpu structure, 668 * as this information may include platform- or architecture-specific state 669 * critical to a subsystem's disposition of a particular CPU. 670 */ 671 void cpu_set_state(cpu_t *); /* record/timestamp current state */ 672 int cpu_get_state(cpu_t *); /* get current cpu state */ 673 const char *cpu_get_state_str(cpu_flag_t); 674 675 676 void cpu_set_curr_clock(uint64_t); /* indicate the current CPU's freq */ 677 void cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */ 678 /* frequencies */ 679 680 int cpu_configure(int); 681 int cpu_unconfigure(int); 682 void cpu_destroy_bound_threads(cpu_t *cp); 683 684 extern int cpu_bind_thread(kthread_t *tp, processorid_t bind, 685 processorid_t *obind, int *error); 686 extern int cpu_unbind(processorid_t cpu_id, boolean_t force); 687 extern void thread_affinity_set(kthread_t *t, int cpu_id); 688 extern void thread_affinity_clear(kthread_t *t); 689 extern void affinity_set(int cpu_id); 690 extern void affinity_clear(void); 691 extern void init_cpu_mstate(struct cpu *, int); 692 extern void term_cpu_mstate(struct cpu *); 693 extern void new_cpu_mstate(int, hrtime_t); 694 extern void get_cpu_mstate(struct cpu *, hrtime_t *); 695 extern void thread_nomigrate(void); 696 extern void thread_allowmigrate(void); 697 extern void weakbinding_stop(void); 698 extern void weakbinding_start(void); 699 700 /* 701 * The following routines affect the CPUs participation in interrupt processing, 702 * if that is applicable on the architecture. This only affects interrupts 703 * which aren't directed at the processor (not cross calls). 704 * 705 * cpu_disable_intr returns non-zero if interrupts were previously enabled. 706 */ 707 int cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */ 708 void cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */ 709 710 /* 711 * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus 712 * and ncpus_online counts. 713 */ 714 extern kmutex_t cpu_lock; /* lock protecting CPU data */ 715 716 /* 717 * CPU state change events 718 * 719 * Various subsystems need to know when CPUs change their state. They get this 720 * information by registering CPU state change callbacks using 721 * register_cpu_setup_func(). Whenever any CPU changes its state, the callback 722 * function is called. The callback function is passed three arguments: 723 * 724 * Event, described by cpu_setup_t 725 * CPU ID 726 * Transparent pointer passed when registering the callback 727 * 728 * The callback function is called with cpu_lock held. The return value from the 729 * callback function is usually ignored, except for CPU_CONFIG and CPU_UNCONFIG 730 * events. For these two events, non-zero return value indicates a failure and 731 * prevents successful completion of the operation. 732 * 733 * New events may be added in the future. Callback functions should ignore any 734 * events that they do not understand. 735 * 736 * The following events provide notification callbacks: 737 * 738 * CPU_INIT A new CPU is started and added to the list of active CPUs 739 * This event is only used during boot 740 * 741 * CPU_CONFIG A newly inserted CPU is prepared for starting running code 742 * This event is called by DR code 743 * 744 * CPU_UNCONFIG CPU has been powered off and needs cleanup 745 * This event is called by DR code 746 * 747 * CPU_ON CPU is enabled but does not run anything yet 748 * 749 * CPU_INTR_ON CPU is enabled and has interrupts enabled 750 * 751 * CPU_OFF CPU is going offline but can still run threads 752 * 753 * CPU_CPUPART_OUT CPU is going to move out of its partition 754 * 755 * CPU_CPUPART_IN CPU is going to move to a new partition 756 * 757 * CPU_SETUP CPU is set up during boot and can run threads 758 */ 759 typedef enum { 760 CPU_INIT, 761 CPU_CONFIG, 762 CPU_UNCONFIG, 763 CPU_ON, 764 CPU_OFF, 765 CPU_CPUPART_IN, 766 CPU_CPUPART_OUT, 767 CPU_SETUP, 768 CPU_INTR_ON 769 } cpu_setup_t; 770 771 typedef int cpu_setup_func_t(cpu_setup_t, int, void *); 772 773 /* 774 * Routines used to register interest in cpu's being added to or removed 775 * from the system. 776 */ 777 extern void register_cpu_setup_func(cpu_setup_func_t *, void *); 778 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *); 779 extern void cpu_state_change_notify(int, cpu_setup_t); 780 781 /* 782 * Call specified function on the given CPU 783 */ 784 typedef void (*cpu_call_func_t)(uintptr_t, uintptr_t); 785 extern void cpu_call(cpu_t *, cpu_call_func_t, uintptr_t, uintptr_t); 786 787 788 /* 789 * Create various strings that describe the given CPU for the 790 * processor_info system call and configuration-related kstats. 791 */ 792 #define CPU_IDSTRLEN 100 793 794 extern void init_cpu_info(struct cpu *); 795 extern void populate_idstr(struct cpu *); 796 extern void cpu_vm_data_init(struct cpu *); 797 extern void cpu_vm_data_destroy(struct cpu *); 798 799 #endif /* _KERNEL || _FAKE_KERNEL */ 800 801 #ifdef __cplusplus 802 } 803 #endif 804 805 #endif /* _SYS_CPUVAR_H */ 806