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 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_CPUVAR_H 28 #define _SYS_CPUVAR_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/thread.h> 33 #include <sys/sysinfo.h> /* has cpu_stat_t definition */ 34 #include <sys/disp.h> 35 #include <sys/processor.h> 36 37 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) 38 #include <sys/machcpuvar.h> 39 #endif 40 41 #include <sys/types.h> 42 #include <sys/file.h> 43 #include <sys/bitmap.h> 44 #include <sys/rwlock.h> 45 #include <sys/msacct.h> 46 #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) && \ 47 (defined(__i386) || defined(__amd64)) 48 #include <asm/cpuvar.h> 49 #endif 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 struct squeue_set_s; 56 57 #define CPU_CACHE_COHERENCE_SIZE 64 58 #define S_LOADAVG_SZ 11 59 #define S_MOVAVG_SZ 10 60 61 struct loadavg_s { 62 int lg_cur; /* current loadavg entry */ 63 unsigned int lg_len; /* number entries recorded */ 64 hrtime_t lg_total; /* used to temporarily hold load totals */ 65 hrtime_t lg_loads[S_LOADAVG_SZ]; /* table of recorded entries */ 66 }; 67 68 /* 69 * For fast event tracing. 70 */ 71 struct ftrace_record; 72 typedef struct ftrace_data { 73 int ftd_state; /* ftrace flags */ 74 kmutex_t ftd_unused; /* ftrace buffer lock, unused */ 75 struct ftrace_record *ftd_cur; /* current record */ 76 struct ftrace_record *ftd_first; /* first record */ 77 struct ftrace_record *ftd_last; /* last record */ 78 } ftrace_data_t; 79 80 struct cyc_cpu; 81 struct nvlist; 82 83 /* 84 * Per-CPU data. 85 * 86 * Be careful adding new members: if they are not the same in all modules (e.g. 87 * change size depending on a #define), CTF uniquification can fail to work 88 * properly. Furthermore, this is transitive in that it applies recursively to 89 * all types pointed to by cpu_t. 90 */ 91 typedef struct cpu { 92 processorid_t cpu_id; /* CPU number */ 93 processorid_t cpu_seqid; /* sequential CPU id (0..ncpus-1) */ 94 volatile cpu_flag_t cpu_flags; /* flags indicating CPU state */ 95 struct cpu *cpu_self; /* pointer to itself */ 96 kthread_t *cpu_thread; /* current thread */ 97 kthread_t *cpu_idle_thread; /* idle thread for this CPU */ 98 kthread_t *cpu_pause_thread; /* pause thread for this CPU */ 99 klwp_id_t cpu_lwp; /* current lwp (if any) */ 100 klwp_id_t cpu_fpowner; /* currently loaded fpu owner */ 101 struct cpupart *cpu_part; /* partition with this CPU */ 102 struct lgrp_ld *cpu_lpl; /* pointer to this cpu's load */ 103 int cpu_cache_offset; /* see kmem.c for details */ 104 105 /* 106 * Links to other CPUs. It is safe to walk these lists if 107 * one of the following is true: 108 * - cpu_lock held 109 * - preemption disabled via kpreempt_disable 110 * - PIL >= DISP_LEVEL 111 * - acting thread is an interrupt thread 112 * - all other CPUs are paused 113 */ 114 struct cpu *cpu_next; /* next existing CPU */ 115 struct cpu *cpu_prev; /* prev existing CPU */ 116 struct cpu *cpu_next_onln; /* next online (enabled) CPU */ 117 struct cpu *cpu_prev_onln; /* prev online (enabled) CPU */ 118 struct cpu *cpu_next_part; /* next CPU in partition */ 119 struct cpu *cpu_prev_part; /* prev CPU in partition */ 120 struct cpu *cpu_next_lgrp; /* next CPU in latency group */ 121 struct cpu *cpu_prev_lgrp; /* prev CPU in latency group */ 122 struct cpu *cpu_next_lpl; /* next CPU in lgrp partition */ 123 struct cpu *cpu_prev_lpl; 124 125 struct cpu_pg *cpu_pg; /* cpu's processor groups */ 126 127 void *cpu_reserved[4]; /* reserved for future use */ 128 129 /* 130 * Scheduling variables. 131 */ 132 disp_t *cpu_disp; /* dispatch queue data */ 133 /* 134 * Note that cpu_disp is set before the CPU is added to the system 135 * and is never modified. Hence, no additional locking is needed 136 * beyond what's necessary to access the cpu_t structure. 137 */ 138 char cpu_runrun; /* scheduling flag - set to preempt */ 139 char cpu_kprunrun; /* force kernel preemption */ 140 pri_t cpu_chosen_level; /* priority at which cpu */ 141 /* was chosen for scheduling */ 142 kthread_t *cpu_dispthread; /* thread selected for dispatch */ 143 disp_lock_t cpu_thread_lock; /* dispatcher lock on current thread */ 144 uint8_t cpu_disp_flags; /* flags used by dispatcher */ 145 /* 146 * The following field is updated when ever the cpu_dispthread 147 * changes. Also in places, where the current thread(cpu_dispthread) 148 * priority changes. This is used in disp_lowpri_cpu() 149 */ 150 pri_t cpu_dispatch_pri; /* priority of cpu_dispthread */ 151 clock_t cpu_last_swtch; /* last time switched to new thread */ 152 153 /* 154 * Interrupt data. 155 */ 156 caddr_t cpu_intr_stack; /* interrupt stack */ 157 kthread_t *cpu_intr_thread; /* interrupt thread list */ 158 uint_t cpu_intr_actv; /* interrupt levels active (bitmask) */ 159 int cpu_base_spl; /* priority for highest rupt active */ 160 161 /* 162 * Statistics. 163 */ 164 cpu_stats_t cpu_stats; /* per-CPU statistics */ 165 struct kstat *cpu_info_kstat; /* kstat for cpu info */ 166 167 uintptr_t cpu_profile_pc; /* kernel PC in profile interrupt */ 168 uintptr_t cpu_profile_upc; /* user PC in profile interrupt */ 169 uintptr_t cpu_profile_pil; /* PIL when profile interrupted */ 170 171 ftrace_data_t cpu_ftrace; /* per cpu ftrace data */ 172 173 clock_t cpu_deadman_lbolt; /* used by deadman() */ 174 uint_t cpu_deadman_countdown; /* used by deadman() */ 175 176 kmutex_t cpu_cpc_ctxlock; /* protects context for idle thread */ 177 kcpc_ctx_t *cpu_cpc_ctx; /* performance counter context */ 178 179 /* 180 * Configuration information for the processor_info system call. 181 */ 182 processor_info_t cpu_type_info; /* config info */ 183 time_t cpu_state_begin; /* when CPU entered current state */ 184 char cpu_cpr_flags; /* CPR related info */ 185 struct cyc_cpu *cpu_cyclic; /* per cpu cyclic subsystem data */ 186 struct squeue_set_s *cpu_squeue_set; /* per cpu squeue set */ 187 struct nvlist *cpu_props; /* pool-related properties */ 188 189 krwlock_t cpu_ft_lock; /* DTrace: fasttrap lock */ 190 uintptr_t cpu_dtrace_caller; /* DTrace: caller, if any */ 191 hrtime_t cpu_dtrace_chillmark; /* DTrace: chill mark time */ 192 hrtime_t cpu_dtrace_chilled; /* DTrace: total chill time */ 193 volatile uint16_t cpu_mstate; /* cpu microstate */ 194 volatile uint16_t cpu_mstate_gen; /* generation counter */ 195 volatile hrtime_t cpu_mstate_start; /* cpu microstate start time */ 196 volatile hrtime_t cpu_acct[NCMSTATES]; /* cpu microstate data */ 197 hrtime_t cpu_intracct[NCMSTATES]; /* interrupt mstate data */ 198 hrtime_t cpu_waitrq; /* cpu run-queue wait time */ 199 struct loadavg_s cpu_loadavg; /* loadavg info for this cpu */ 200 201 char *cpu_idstr; /* for printing and debugging */ 202 char *cpu_brandstr; /* for printing */ 203 204 /* 205 * Sum of all device interrupt weights that are currently directed at 206 * this cpu. Cleared at start of interrupt redistribution. 207 */ 208 int32_t cpu_intr_weight; 209 void *cpu_vm_data; 210 211 struct cpu_physid *cpu_physid; /* physical associations */ 212 213 /* 214 * New members must be added /before/ this member, as the CTF tools 215 * rely on this being the last field before cpu_m, so they can 216 * correctly calculate the offset when synthetically adding the cpu_m 217 * member in objects that do not have it. This fixup is required for 218 * uniquification to work correctly. 219 */ 220 uintptr_t cpu_m_pad; 221 222 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) 223 struct machcpu cpu_m; /* per architecture info */ 224 #endif 225 } cpu_t; 226 227 /* 228 * The cpu_core structure consists of per-CPU state available in any context. 229 * On some architectures, this may mean that the page(s) containing the 230 * NCPU-sized array of cpu_core structures must be locked in the TLB -- it 231 * is up to the platform to assure that this is performed properly. Note that 232 * the structure is sized to avoid false sharing. 233 */ 234 #define CPUC_SIZE (sizeof (uint16_t) + sizeof (uintptr_t) + \ 235 sizeof (kmutex_t)) 236 #define CPUC_PADSIZE CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE 237 238 typedef struct cpu_core { 239 uint16_t cpuc_dtrace_flags; /* DTrace flags */ 240 uint8_t cpuc_pad[CPUC_PADSIZE]; /* padding */ 241 uintptr_t cpuc_dtrace_illval; /* DTrace illegal value */ 242 kmutex_t cpuc_pid_lock; /* DTrace pid provider lock */ 243 } cpu_core_t; 244 245 #ifdef _KERNEL 246 extern cpu_core_t cpu_core[]; 247 #endif /* _KERNEL */ 248 249 /* 250 * CPU_ON_INTR() macro. Returns non-zero if currently on interrupt stack. 251 * Note that this isn't a test for a high PIL. For example, cpu_intr_actv 252 * does not get updated when we go through sys_trap from TL>0 at high PIL. 253 * getpil() should be used instead to check for PIL levels. 254 */ 255 #define CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1)) 256 257 #if defined(_KERNEL) || defined(_KMEMUSER) 258 259 #define INTR_STACK_SIZE MAX(DEFAULTSTKSZ, PAGESIZE) 260 261 /* MEMBERS PROTECTED BY "atomicity": cpu_flags */ 262 263 /* 264 * Flags in the CPU structure. 265 * 266 * These are protected by cpu_lock (except during creation). 267 * 268 * Offlined-CPUs have three stages of being offline: 269 * 270 * CPU_ENABLE indicates that the CPU is participating in I/O interrupts 271 * that can be directed at a number of different CPUs. If CPU_ENABLE 272 * is off, the CPU will not be given interrupts that can be sent elsewhere, 273 * but will still get interrupts from devices associated with that CPU only, 274 * and from other CPUs. 275 * 276 * CPU_OFFLINE indicates that the dispatcher should not allow any threads 277 * other than interrupt threads to run on that CPU. A CPU will not have 278 * CPU_OFFLINE set if there are any bound threads (besides interrupts). 279 * 280 * CPU_QUIESCED is set if p_offline was able to completely turn idle the 281 * CPU and it will not have to run interrupt threads. In this case it'll 282 * stay in the idle loop until CPU_QUIESCED is turned off. 283 * 284 * CPU_FROZEN is used only by CPR to mark CPUs that have been successfully 285 * suspended (in the suspend path), or have yet to be resumed (in the resume 286 * case). 287 * 288 * On some platforms CPUs can be individually powered off. 289 * The following flags are set for powered off CPUs: CPU_QUIESCED, 290 * CPU_OFFLINE, and CPU_POWEROFF. The following flags are cleared: 291 * CPU_RUNNING, CPU_READY, CPU_EXISTS, and CPU_ENABLE. 292 */ 293 #define CPU_RUNNING 0x001 /* CPU running */ 294 #define CPU_READY 0x002 /* CPU ready for cross-calls */ 295 #define CPU_QUIESCED 0x004 /* CPU will stay in idle */ 296 #define CPU_EXISTS 0x008 /* CPU is configured */ 297 #define CPU_ENABLE 0x010 /* CPU enabled for interrupts */ 298 #define CPU_OFFLINE 0x020 /* CPU offline via p_online */ 299 #define CPU_POWEROFF 0x040 /* CPU is powered off */ 300 #define CPU_FROZEN 0x080 /* CPU is frozen via CPR suspend */ 301 #define CPU_SPARE 0x100 /* CPU offline available for use */ 302 #define CPU_FAULTED 0x200 /* CPU offline diagnosed faulty */ 303 304 #define FMT_CPU_FLAGS \ 305 "\20\12fault\11spare\10frozen" \ 306 "\7poweroff\6offline\5enable\4exist\3quiesced\2ready\1run" 307 308 #define CPU_ACTIVE(cpu) (((cpu)->cpu_flags & CPU_OFFLINE) == 0) 309 310 /* 311 * Flags for cpu_offline(), cpu_faulted(), and cpu_spare(). 312 */ 313 #define CPU_FORCED 0x0001 /* Force CPU offline */ 314 315 /* 316 * DTrace flags. 317 */ 318 #define CPU_DTRACE_NOFAULT 0x0001 /* Don't fault */ 319 #define CPU_DTRACE_DROP 0x0002 /* Drop this ECB */ 320 #define CPU_DTRACE_BADADDR 0x0004 /* DTrace fault: bad address */ 321 #define CPU_DTRACE_BADALIGN 0x0008 /* DTrace fault: bad alignment */ 322 #define CPU_DTRACE_DIVZERO 0x0010 /* DTrace fault: divide by zero */ 323 #define CPU_DTRACE_ILLOP 0x0020 /* DTrace fault: illegal operation */ 324 #define CPU_DTRACE_NOSCRATCH 0x0040 /* DTrace fault: out of scratch */ 325 #define CPU_DTRACE_KPRIV 0x0080 /* DTrace fault: bad kernel access */ 326 #define CPU_DTRACE_UPRIV 0x0100 /* DTrace fault: bad user access */ 327 #define CPU_DTRACE_TUPOFLOW 0x0200 /* DTrace fault: tuple stack overflow */ 328 #if defined(__sparc) 329 #define CPU_DTRACE_FAKERESTORE 0x0400 /* pid provider hint to getreg */ 330 #endif 331 #define CPU_DTRACE_ENTRY 0x0800 /* pid provider hint to ustack() */ 332 #define CPU_DTRACE_BADSTACK 0x1000 /* DTrace fault: bad stack */ 333 334 #define CPU_DTRACE_FAULT (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \ 335 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \ 336 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \ 337 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \ 338 CPU_DTRACE_BADSTACK) 339 #define CPU_DTRACE_ERROR (CPU_DTRACE_FAULT | CPU_DTRACE_DROP) 340 341 /* 342 * Dispatcher flags 343 * These flags must be changed only by the current CPU. 344 */ 345 #define CPU_DISP_DONTSTEAL 0x01 /* CPU undergoing context swtch */ 346 #define CPU_DISP_HALTED 0x02 /* CPU halted waiting for interrupt */ 347 348 349 #endif /* _KERNEL || _KMEMUSER */ 350 351 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) 352 353 /* 354 * Macros for manipulating sets of CPUs as a bitmap. Note that this 355 * bitmap may vary in size depending on the maximum CPU id a specific 356 * platform supports. This may be different than the number of CPUs 357 * the platform supports, since CPU ids can be sparse. We define two 358 * sets of macros; one for platforms where the maximum CPU id is less 359 * than the number of bits in a single word (32 in a 32-bit kernel, 360 * 64 in a 64-bit kernel), and one for platforms that require bitmaps 361 * of more than one word. 362 */ 363 364 #define CPUSET_WORDS BT_BITOUL(NCPU) 365 #define CPUSET_NOTINSET ((uint_t)-1) 366 367 #if CPUSET_WORDS > 1 368 369 typedef struct cpuset { 370 ulong_t cpub[CPUSET_WORDS]; 371 } cpuset_t; 372 373 /* 374 * Private functions for manipulating cpusets that do not fit in a 375 * single word. These should not be used directly; instead the 376 * CPUSET_* macros should be used so the code will be portable 377 * across different definitions of NCPU. 378 */ 379 extern void cpuset_all(cpuset_t *); 380 extern void cpuset_all_but(cpuset_t *, uint_t); 381 extern int cpuset_isnull(cpuset_t *); 382 extern int cpuset_cmp(cpuset_t *, cpuset_t *); 383 extern void cpuset_only(cpuset_t *, uint_t); 384 extern uint_t cpuset_find(cpuset_t *); 385 extern void cpuset_bounds(cpuset_t *, uint_t *, uint_t *); 386 387 #define CPUSET_ALL(set) cpuset_all(&(set)) 388 #define CPUSET_ALL_BUT(set, cpu) cpuset_all_but(&(set), cpu) 389 #define CPUSET_ONLY(set, cpu) cpuset_only(&(set), cpu) 390 #define CPU_IN_SET(set, cpu) BT_TEST((set).cpub, cpu) 391 #define CPUSET_ADD(set, cpu) BT_SET((set).cpub, cpu) 392 #define CPUSET_DEL(set, cpu) BT_CLEAR((set).cpub, cpu) 393 #define CPUSET_ISNULL(set) cpuset_isnull(&(set)) 394 #define CPUSET_ISEQUAL(set1, set2) cpuset_cmp(&(set1), &(set2)) 395 396 /* 397 * Find one CPU in the cpuset. 398 * Sets "cpu" to the id of the found CPU, or CPUSET_NOTINSET if no cpu 399 * could be found. (i.e. empty set) 400 */ 401 #define CPUSET_FIND(set, cpu) { \ 402 cpu = cpuset_find(&(set)); \ 403 } 404 405 /* 406 * Determine the smallest and largest CPU id in the set. Returns 407 * CPUSET_NOTINSET in smallest and largest when set is empty. 408 */ 409 #define CPUSET_BOUNDS(set, smallest, largest) { \ 410 cpuset_bounds(&(set), &(smallest), &(largest)); \ 411 } 412 413 /* 414 * Atomic cpuset operations 415 * These are safe to use for concurrent cpuset manipulations. 416 * "xdel" and "xadd" are exclusive operations, that set "result" to "0" 417 * if the add or del was successful, or "-1" if not successful. 418 * (e.g. attempting to add a cpu to a cpuset that's already there, or 419 * deleting a cpu that's not in the cpuset) 420 */ 421 422 #define CPUSET_ATOMIC_DEL(set, cpu) BT_ATOMIC_CLEAR((set).cpub, (cpu)) 423 #define CPUSET_ATOMIC_ADD(set, cpu) BT_ATOMIC_SET((set).cpub, (cpu)) 424 425 #define CPUSET_ATOMIC_XADD(set, cpu, result) \ 426 BT_ATOMIC_SET_EXCL((set).cpub, cpu, result) 427 428 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \ 429 BT_ATOMIC_CLEAR_EXCL((set).cpub, cpu, result) 430 431 432 #define CPUSET_OR(set1, set2) { \ 433 int _i; \ 434 for (_i = 0; _i < CPUSET_WORDS; _i++) \ 435 (set1).cpub[_i] |= (set2).cpub[_i]; \ 436 } 437 438 #define CPUSET_AND(set1, set2) { \ 439 int _i; \ 440 for (_i = 0; _i < CPUSET_WORDS; _i++) \ 441 (set1).cpub[_i] &= (set2).cpub[_i]; \ 442 } 443 444 #define CPUSET_ZERO(set) { \ 445 int _i; \ 446 for (_i = 0; _i < CPUSET_WORDS; _i++) \ 447 (set).cpub[_i] = 0; \ 448 } 449 450 #elif CPUSET_WORDS == 1 451 452 typedef ulong_t cpuset_t; /* a set of CPUs */ 453 454 #define CPUSET(cpu) (1UL << (cpu)) 455 456 #define CPUSET_ALL(set) ((void)((set) = ~0UL)) 457 #define CPUSET_ALL_BUT(set, cpu) ((void)((set) = ~CPUSET(cpu))) 458 #define CPUSET_ONLY(set, cpu) ((void)((set) = CPUSET(cpu))) 459 #define CPU_IN_SET(set, cpu) ((set) & CPUSET(cpu)) 460 #define CPUSET_ADD(set, cpu) ((void)((set) |= CPUSET(cpu))) 461 #define CPUSET_DEL(set, cpu) ((void)((set) &= ~CPUSET(cpu))) 462 #define CPUSET_ISNULL(set) ((set) == 0) 463 #define CPUSET_ISEQUAL(set1, set2) ((set1) == (set2)) 464 #define CPUSET_OR(set1, set2) ((void)((set1) |= (set2))) 465 #define CPUSET_AND(set1, set2) ((void)((set1) &= (set2))) 466 #define CPUSET_ZERO(set) ((void)((set) = 0)) 467 468 #define CPUSET_FIND(set, cpu) { \ 469 cpu = (uint_t)(lowbit(set) - 1); \ 470 } 471 472 #define CPUSET_BOUNDS(set, smallest, largest) { \ 473 smallest = (uint_t)(lowbit(set) - 1); \ 474 largest = (uint_t)(highbit(set) - 1); \ 475 } 476 477 #define CPUSET_ATOMIC_DEL(set, cpu) atomic_and_long(&(set), ~CPUSET(cpu)) 478 #define CPUSET_ATOMIC_ADD(set, cpu) atomic_or_long(&(set), CPUSET(cpu)) 479 480 #define CPUSET_ATOMIC_XADD(set, cpu, result) \ 481 { result = atomic_set_long_excl(&(set), (cpu)); } 482 483 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \ 484 { result = atomic_clear_long_excl(&(set), (cpu)); } 485 486 #else /* CPUSET_WORDS <= 0 */ 487 488 #error NCPU is undefined or invalid 489 490 #endif /* CPUSET_WORDS */ 491 492 extern cpuset_t cpu_seqid_inuse; 493 494 #endif /* (_KERNEL || _KMEMUSER) && _MACHDEP */ 495 496 #define CPU_CPR_OFFLINE 0x0 497 #define CPU_CPR_ONLINE 0x1 498 #define CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0) 499 #define CPU_SET_CPR_FLAGS(cpu, flag) ((cpu)->cpu_cpr_flags |= flag) 500 501 #if defined(_KERNEL) || defined(_KMEMUSER) 502 503 extern struct cpu *cpu[]; /* indexed by CPU number */ 504 extern cpu_t *cpu_list; /* list of CPUs */ 505 extern int ncpus; /* number of CPUs present */ 506 extern int ncpus_online; /* number of CPUs not quiesced */ 507 extern int max_ncpus; /* max present before ncpus is known */ 508 extern int boot_max_ncpus; /* like max_ncpus but for real */ 509 extern processorid_t max_cpuid; /* maximum CPU number */ 510 extern struct cpu *cpu_inmotion; /* offline or partition move target */ 511 512 #if defined(__i386) || defined(__amd64) 513 extern struct cpu *curcpup(void); 514 #define CPU (curcpup()) /* Pointer to current CPU */ 515 #else 516 #define CPU (curthread->t_cpu) /* Pointer to current CPU */ 517 #endif 518 519 /* 520 * CPU_CURRENT indicates to thread_affinity_set to use CPU->cpu_id 521 * as the target and to grab cpu_lock instead of requiring the caller 522 * to grab it. 523 */ 524 #define CPU_CURRENT -3 525 526 /* 527 * Per-CPU statistics 528 * 529 * cpu_stats_t contains numerous system and VM-related statistics, in the form 530 * of gauges or monotonically-increasing event occurrence counts. 531 */ 532 533 #define CPU_STATS_ENTER_K() kpreempt_disable() 534 #define CPU_STATS_EXIT_K() kpreempt_enable() 535 536 #define CPU_STATS_ADD_K(class, stat, amount) \ 537 { kpreempt_disable(); /* keep from switching CPUs */\ 538 CPU_STATS_ADDQ(CPU, class, stat, amount); \ 539 kpreempt_enable(); \ 540 } 541 542 #define CPU_STATS_ADDQ(cp, class, stat, amount) { \ 543 extern void __dtrace_probe___cpu_##class##info_##stat(uint_t, \ 544 uint64_t *, cpu_t *); \ 545 uint64_t *stataddr = &((cp)->cpu_stats.class.stat); \ 546 __dtrace_probe___cpu_##class##info_##stat((amount), \ 547 stataddr, cp); \ 548 *(stataddr) += (amount); \ 549 } 550 551 #define CPU_STATS(cp, stat) \ 552 ((cp)->cpu_stats.stat) 553 554 #endif /* _KERNEL || _KMEMUSER */ 555 556 /* 557 * CPU support routines. 558 */ 559 #if defined(_KERNEL) && defined(__STDC__) /* not for genassym.c */ 560 561 struct zone; 562 563 void cpu_list_init(cpu_t *); 564 void cpu_add_unit(cpu_t *); 565 void cpu_del_unit(int cpuid); 566 void cpu_add_active(cpu_t *); 567 void cpu_kstat_init(cpu_t *); 568 void cpu_visibility_add(cpu_t *, struct zone *); 569 void cpu_visibility_remove(cpu_t *, struct zone *); 570 void cpu_visibility_configure(cpu_t *, struct zone *); 571 void cpu_visibility_unconfigure(cpu_t *, struct zone *); 572 void cpu_visibility_online(cpu_t *, struct zone *); 573 void cpu_visibility_offline(cpu_t *, struct zone *); 574 void cpu_create_intrstat(cpu_t *); 575 void cpu_delete_intrstat(cpu_t *); 576 int cpu_kstat_intrstat_update(kstat_t *, int); 577 void cpu_intr_swtch_enter(kthread_t *); 578 void cpu_intr_swtch_exit(kthread_t *); 579 580 void mbox_lock_init(void); /* initialize cross-call locks */ 581 void mbox_init(int cpun); /* initialize cross-calls */ 582 void poke_cpu(int cpun); /* interrupt another CPU (to preempt) */ 583 584 /* 585 * values for safe_list. Pause state that CPUs are in. 586 */ 587 #define PAUSE_IDLE 0 /* normal state */ 588 #define PAUSE_READY 1 /* paused thread ready to spl */ 589 #define PAUSE_WAIT 2 /* paused thread is spl-ed high */ 590 #define PAUSE_DIE 3 /* tell pause thread to leave */ 591 #define PAUSE_DEAD 4 /* pause thread has left */ 592 593 void mach_cpu_pause(volatile char *); 594 595 void pause_cpus(cpu_t *off_cp); 596 void start_cpus(void); 597 int cpus_paused(void); 598 599 void cpu_pause_init(void); 600 cpu_t *cpu_get(processorid_t cpun); /* get the CPU struct associated */ 601 602 int cpu_online(cpu_t *cp); /* take cpu online */ 603 int cpu_offline(cpu_t *cp, int flags); /* take cpu offline */ 604 int cpu_spare(cpu_t *cp, int flags); /* take cpu to spare */ 605 int cpu_faulted(cpu_t *cp, int flags); /* take cpu to faulted */ 606 int cpu_poweron(cpu_t *cp); /* take powered-off cpu to offline */ 607 int cpu_poweroff(cpu_t *cp); /* take offline cpu to powered-off */ 608 609 cpu_t *cpu_intr_next(cpu_t *cp); /* get next online CPU taking intrs */ 610 int cpu_intr_count(cpu_t *cp); /* count # of CPUs handling intrs */ 611 int cpu_intr_on(cpu_t *cp); /* CPU taking I/O interrupts? */ 612 void cpu_intr_enable(cpu_t *cp); /* enable I/O interrupts */ 613 int cpu_intr_disable(cpu_t *cp); /* disable I/O interrupts */ 614 void cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */ 615 616 /* 617 * Routines for checking CPU states. 618 */ 619 int cpu_is_online(cpu_t *); /* check if CPU is online */ 620 int cpu_is_nointr(cpu_t *); /* check if CPU can service intrs */ 621 int cpu_is_active(cpu_t *); /* check if CPU can run threads */ 622 int cpu_is_offline(cpu_t *); /* check if CPU is offline */ 623 int cpu_is_poweredoff(cpu_t *); /* check if CPU is powered off */ 624 625 int cpu_flagged_online(cpu_flag_t); /* flags show CPU is online */ 626 int cpu_flagged_nointr(cpu_flag_t); /* flags show CPU not handling intrs */ 627 int cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */ 628 int cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */ 629 int cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */ 630 631 /* 632 * The processor_info(2) state of a CPU is a simplified representation suitable 633 * for use by an application program. Kernel subsystems should utilize the 634 * internal per-CPU state as given by the cpu_flags member of the cpu structure, 635 * as this information may include platform- or architecture-specific state 636 * critical to a subsystem's disposition of a particular CPU. 637 */ 638 void cpu_set_state(cpu_t *); /* record/timestamp current state */ 639 int cpu_get_state(cpu_t *); /* get current cpu state */ 640 const char *cpu_get_state_str(cpu_t *); /* get current cpu state as string */ 641 642 int cpu_configure(int); 643 int cpu_unconfigure(int); 644 void cpu_destroy_bound_threads(cpu_t *cp); 645 646 extern int cpu_bind_thread(kthread_t *tp, processorid_t bind, 647 processorid_t *obind, int *error); 648 extern int cpu_unbind(processorid_t cpu_id); 649 extern void thread_affinity_set(kthread_t *t, int cpu_id); 650 extern void thread_affinity_clear(kthread_t *t); 651 extern void affinity_set(int cpu_id); 652 extern void affinity_clear(void); 653 extern void init_cpu_mstate(struct cpu *, int); 654 extern void term_cpu_mstate(struct cpu *); 655 extern void new_cpu_mstate(int, hrtime_t); 656 extern void get_cpu_mstate(struct cpu *, hrtime_t *); 657 extern void thread_nomigrate(void); 658 extern void thread_allowmigrate(void); 659 extern void weakbinding_stop(void); 660 extern void weakbinding_start(void); 661 662 /* 663 * The following routines affect the CPUs participation in interrupt processing, 664 * if that is applicable on the architecture. This only affects interrupts 665 * which aren't directed at the processor (not cross calls). 666 * 667 * cpu_disable_intr returns non-zero if interrupts were previously enabled. 668 */ 669 int cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */ 670 void cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */ 671 672 /* 673 * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus 674 * and ncpus_online counts. 675 */ 676 extern kmutex_t cpu_lock; /* lock protecting CPU data */ 677 678 typedef enum { 679 CPU_INIT, 680 CPU_CONFIG, 681 CPU_UNCONFIG, 682 CPU_ON, 683 CPU_OFF, 684 CPU_CPUPART_IN, 685 CPU_CPUPART_OUT 686 } cpu_setup_t; 687 688 typedef int cpu_setup_func_t(cpu_setup_t, int, void *); 689 690 /* 691 * Routines used to register interest in cpu's being added to or removed 692 * from the system. 693 */ 694 extern void register_cpu_setup_func(cpu_setup_func_t *, void *); 695 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *); 696 extern void cpu_state_change_notify(int, cpu_setup_t); 697 698 /* 699 * Create various strings that describe the given CPU for the 700 * processor_info system call and configuration-related kstats. 701 */ 702 #define CPU_IDSTRLEN 100 703 704 extern void init_cpu_info(struct cpu *); 705 extern void cpu_vm_data_init(struct cpu *); 706 extern void cpu_vm_data_destroy(struct cpu *); 707 708 #endif /* _KERNEL */ 709 710 #ifdef __cplusplus 711 } 712 #endif 713 714 #endif /* _SYS_CPUVAR_H */ 715