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.
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.
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]
23 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2014 Igor Kozhukhov <ikozhukhov@gmail.com>.
30 #include <sys/thread.h>
31 #include <sys/sysinfo.h> /* has cpu_stat_t definition */
33 #include <sys/processor.h>
35 #include <sys/loadavg.h>
36 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
37 #include <sys/machcpuvar.h>
40 #include <sys/types.h>
42 #include <sys/bitmap.h>
43 #include <sys/rwlock.h>
44 #include <sys/msacct.h>
45 #if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) && \
46 (defined(__i386) || defined(__amd64))
47 #include <asm/cpuvar.h>
56 #define CPU_CACHE_COHERENCE_SIZE 64
59 * For fast event tracing.
62 typedef struct ftrace_data {
63 int ftd_state; /* ftrace flags */
64 kmutex_t ftd_unused; /* ftrace buffer lock, unused */
65 struct ftrace_record *ftd_cur; /* current record */
66 struct ftrace_record *ftd_first; /* first record */
67 struct ftrace_record *ftd_last; /* last record */
76 * Be careful adding new members: if they are not the same in all modules (e.g.
77 * change size depending on a #define), CTF uniquification can fail to work
78 * properly. Furthermore, this is transitive in that it applies recursively to
79 * all types pointed to by cpu_t.
82 processorid_t cpu_id; /* CPU number */
83 processorid_t cpu_seqid; /* sequential CPU id (0..ncpus-1) */
84 volatile cpu_flag_t cpu_flags; /* flags indicating CPU state */
85 struct cpu *cpu_self; /* pointer to itself */
86 kthread_t *cpu_thread; /* current thread */
87 kthread_t *cpu_idle_thread; /* idle thread for this CPU */
88 kthread_t *cpu_pause_thread; /* pause thread for this CPU */
89 klwp_id_t cpu_lwp; /* current lwp (if any) */
90 klwp_id_t cpu_fpowner; /* currently loaded fpu owner */
91 struct cpupart *cpu_part; /* partition with this CPU */
92 struct lgrp_ld *cpu_lpl; /* pointer to this cpu's load */
93 int cpu_cache_offset; /* see kmem.c for details */
96 * Links to other CPUs. It is safe to walk these lists if
97 * one of the following is true:
99 * - preemption disabled via kpreempt_disable
100 * - PIL >= DISP_LEVEL
101 * - acting thread is an interrupt thread
102 * - all other CPUs are paused
104 struct cpu *cpu_next; /* next existing CPU */
105 struct cpu *cpu_prev; /* prev existing CPU */
106 struct cpu *cpu_next_onln; /* next online (enabled) CPU */
107 struct cpu *cpu_prev_onln; /* prev online (enabled) CPU */
108 struct cpu *cpu_next_part; /* next CPU in partition */
109 struct cpu *cpu_prev_part; /* prev CPU in partition */
110 struct cpu *cpu_next_lgrp; /* next CPU in latency group */
111 struct cpu *cpu_prev_lgrp; /* prev CPU in latency group */
112 struct cpu *cpu_next_lpl; /* next CPU in lgrp partition */
113 struct cpu *cpu_prev_lpl;
115 struct cpu_pg *cpu_pg; /* cpu's processor groups */
117 void *cpu_reserved[4]; /* reserved for future use */
120 * Scheduling variables.
122 disp_t *cpu_disp; /* dispatch queue data */
124 * Note that cpu_disp is set before the CPU is added to the system
125 * and is never modified. Hence, no additional locking is needed
126 * beyond what's necessary to access the cpu_t structure.
128 char cpu_runrun; /* scheduling flag - set to preempt */
129 char cpu_kprunrun; /* force kernel preemption */
130 pri_t cpu_chosen_level; /* priority at which cpu */
131 /* was chosen for scheduling */
132 kthread_t *cpu_dispthread; /* thread selected for dispatch */
133 disp_lock_t cpu_thread_lock; /* dispatcher lock on current thread */
134 uint8_t cpu_disp_flags; /* flags used by dispatcher */
136 * The following field is updated when ever the cpu_dispthread
137 * changes. Also in places, where the current thread(cpu_dispthread)
138 * priority changes. This is used in disp_lowpri_cpu()
140 pri_t cpu_dispatch_pri; /* priority of cpu_dispthread */
141 clock_t cpu_last_swtch; /* last time switched to new thread */
146 caddr_t cpu_intr_stack; /* interrupt stack */
147 kthread_t *cpu_intr_thread; /* interrupt thread list */
148 uint_t cpu_intr_actv; /* interrupt levels active (bitmask) */
149 int cpu_base_spl; /* priority for highest rupt active */
154 cpu_stats_t cpu_stats; /* per-CPU statistics */
155 struct kstat *cpu_info_kstat; /* kstat for cpu info */
157 uintptr_t cpu_profile_pc; /* kernel PC in profile interrupt */
158 uintptr_t cpu_profile_upc; /* user PC in profile interrupt */
159 uintptr_t cpu_profile_pil; /* PIL when profile interrupted */
161 ftrace_data_t cpu_ftrace; /* per cpu ftrace data */
163 clock_t cpu_deadman_counter; /* used by deadman() */
164 uint_t cpu_deadman_countdown; /* used by deadman() */
166 kmutex_t cpu_cpc_ctxlock; /* protects context for idle thread */
167 kcpc_ctx_t *cpu_cpc_ctx; /* performance counter context */
170 * Configuration information for the processor_info system call.
172 processor_info_t cpu_type_info; /* config info */
173 time_t cpu_state_begin; /* when CPU entered current state */
174 char cpu_cpr_flags; /* CPR related info */
175 struct cyc_cpu *cpu_cyclic; /* per cpu cyclic subsystem data */
176 struct squeue_set_s *cpu_squeue_set; /* per cpu squeue set */
177 struct nvlist *cpu_props; /* pool-related properties */
179 krwlock_t cpu_ft_lock; /* DTrace: fasttrap lock */
180 uintptr_t cpu_dtrace_caller; /* DTrace: caller, if any */
181 hrtime_t cpu_dtrace_chillmark; /* DTrace: chill mark time */
182 hrtime_t cpu_dtrace_chilled; /* DTrace: total chill time */
183 volatile uint16_t cpu_mstate; /* cpu microstate */
184 volatile uint16_t cpu_mstate_gen; /* generation counter */
185 volatile hrtime_t cpu_mstate_start; /* cpu microstate start time */
186 volatile hrtime_t cpu_acct[NCMSTATES]; /* cpu microstate data */
187 hrtime_t cpu_intracct[NCMSTATES]; /* interrupt mstate data */
188 hrtime_t cpu_waitrq; /* cpu run-queue wait time */
189 struct loadavg_s cpu_loadavg; /* loadavg info for this cpu */
191 char *cpu_idstr; /* for printing and debugging */
192 char *cpu_brandstr; /* for printing */
195 * Sum of all device interrupt weights that are currently directed at
196 * this cpu. Cleared at start of interrupt redistribution.
198 int32_t cpu_intr_weight;
201 struct cpu_physid *cpu_physid; /* physical associations */
203 uint64_t cpu_curr_clock; /* current clock freq in Hz */
204 char *cpu_supp_freqs; /* supported freqs in Hz */
206 uintptr_t cpu_cpcprofile_pc; /* kernel PC in cpc interrupt */
207 uintptr_t cpu_cpcprofile_upc; /* user PC in cpc interrupt */
210 * Interrupt load factor used by dispatcher & softcall
212 hrtime_t cpu_intrlast; /* total interrupt time (nsec) */
213 int cpu_intrload; /* interrupt load factor (0-99%) */
215 uint_t cpu_rotor; /* for cheap pseudo-random numbers */
217 struct cu_cpu_info *cpu_cu_info; /* capacity & util. info */
220 * cpu_generation is updated whenever CPU goes on-line or off-line.
221 * Updates to cpu_generation are protected by cpu_lock.
223 * See CPU_NEW_GENERATION() macro below.
225 volatile uint_t cpu_generation; /* tracking on/off-line */
228 * New members must be added /before/ this member, as the CTF tools
229 * rely on this being the last field before cpu_m, so they can
230 * correctly calculate the offset when synthetically adding the cpu_m
231 * member in objects that do not have it. This fixup is required for
232 * uniquification to work correctly.
236 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
237 struct machcpu cpu_m; /* per architecture info */
242 * The cpu_core structure consists of per-CPU state available in any context.
243 * On some architectures, this may mean that the page(s) containing the
244 * NCPU-sized array of cpu_core structures must be locked in the TLB -- it
245 * is up to the platform to assure that this is performed properly. Note that
246 * the structure is sized to avoid false sharing.
248 #define CPUC_SIZE (sizeof (uint16_t) + sizeof (uint8_t) + \
249 sizeof (uintptr_t) + sizeof (kmutex_t))
250 #define CPUC_PADSIZE CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE
252 typedef struct cpu_core {
253 uint16_t cpuc_dtrace_flags; /* DTrace flags */
254 uint8_t cpuc_dcpc_intr_state; /* DCPC provider intr state */
255 uint8_t cpuc_pad[CPUC_PADSIZE]; /* padding */
256 uintptr_t cpuc_dtrace_illval; /* DTrace illegal value */
257 kmutex_t cpuc_pid_lock; /* DTrace pid provider lock */
261 extern cpu_core_t cpu_core[];
265 * CPU_ON_INTR() macro. Returns non-zero if currently on interrupt stack.
266 * Note that this isn't a test for a high PIL. For example, cpu_intr_actv
267 * does not get updated when we go through sys_trap from TL>0 at high PIL.
268 * getpil() should be used instead to check for PIL levels.
270 #define CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1))
273 * Check to see if an interrupt thread might be active at a given ipl.
275 * We must be conservative--it is ok to give a false yes, but a false no
276 * will cause disaster. (But if the situation changes after we check it is
277 * ok--the caller is trying to ensure that an interrupt routine has been
279 * This is used when trying to remove an interrupt handler from an autovector
282 #define INTR_ACTIVE(cpup, level) \
283 ((level) <= LOCK_LEVEL ? \
284 ((cpup)->cpu_intr_actv & (1 << (level))) : (CPU_ON_INTR(cpup)))
287 * CPU_PSEUDO_RANDOM() returns a per CPU value that changes each time one
288 * looks at it. It's meant as a cheap mechanism to be incorporated in routines
289 * wanting to avoid biasing, but where true randomness isn't needed (just
290 * something that changes).
292 #define CPU_PSEUDO_RANDOM() (CPU->cpu_rotor++)
294 #if defined(_KERNEL) || defined(_KMEMUSER)
296 #define INTR_STACK_SIZE MAX(DEFAULTSTKSZ, PAGESIZE)
298 /* MEMBERS PROTECTED BY "atomicity": cpu_flags */
301 * Flags in the CPU structure.
303 * These are protected by cpu_lock (except during creation).
305 * Offlined-CPUs have three stages of being offline:
307 * CPU_ENABLE indicates that the CPU is participating in I/O interrupts
308 * that can be directed at a number of different CPUs. If CPU_ENABLE
309 * is off, the CPU will not be given interrupts that can be sent elsewhere,
310 * but will still get interrupts from devices associated with that CPU only,
311 * and from other CPUs.
313 * CPU_OFFLINE indicates that the dispatcher should not allow any threads
314 * other than interrupt threads to run on that CPU. A CPU will not have
315 * CPU_OFFLINE set if there are any bound threads (besides interrupts).
317 * CPU_QUIESCED is set if p_offline was able to completely turn idle the
318 * CPU and it will not have to run interrupt threads. In this case it'll
319 * stay in the idle loop until CPU_QUIESCED is turned off.
321 * CPU_FROZEN is used only by CPR to mark CPUs that have been successfully
322 * suspended (in the suspend path), or have yet to be resumed (in the resume
325 * On some platforms CPUs can be individually powered off.
326 * The following flags are set for powered off CPUs: CPU_QUIESCED,
327 * CPU_OFFLINE, and CPU_POWEROFF. The following flags are cleared:
328 * CPU_RUNNING, CPU_READY, CPU_EXISTS, and CPU_ENABLE.
330 #define CPU_RUNNING 0x001 /* CPU running */
331 #define CPU_READY 0x002 /* CPU ready for cross-calls */
332 #define CPU_QUIESCED 0x004 /* CPU will stay in idle */
333 #define CPU_EXISTS 0x008 /* CPU is configured */
334 #define CPU_ENABLE 0x010 /* CPU enabled for interrupts */
335 #define CPU_OFFLINE 0x020 /* CPU offline via p_online */
336 #define CPU_POWEROFF 0x040 /* CPU is powered off */
337 #define CPU_FROZEN 0x080 /* CPU is frozen via CPR suspend */
338 #define CPU_SPARE 0x100 /* CPU offline available for use */
339 #define CPU_FAULTED 0x200 /* CPU offline diagnosed faulty */
341 #define FMT_CPU_FLAGS \
342 "\20\12fault\11spare\10frozen" \
343 "\7poweroff\6offline\5enable\4exist\3quiesced\2ready\1run"
345 #define CPU_ACTIVE(cpu) (((cpu)->cpu_flags & CPU_OFFLINE) == 0)
348 * Flags for cpu_offline(), cpu_faulted(), and cpu_spare().
350 #define CPU_FORCED 0x0001 /* Force CPU offline */
355 #define CPU_DTRACE_NOFAULT 0x0001 /* Don't fault */
356 #define CPU_DTRACE_DROP 0x0002 /* Drop this ECB */
357 #define CPU_DTRACE_BADADDR 0x0004 /* DTrace fault: bad address */
358 #define CPU_DTRACE_BADALIGN 0x0008 /* DTrace fault: bad alignment */
359 #define CPU_DTRACE_DIVZERO 0x0010 /* DTrace fault: divide by zero */
360 #define CPU_DTRACE_ILLOP 0x0020 /* DTrace fault: illegal operation */
361 #define CPU_DTRACE_NOSCRATCH 0x0040 /* DTrace fault: out of scratch */
362 #define CPU_DTRACE_KPRIV 0x0080 /* DTrace fault: bad kernel access */
363 #define CPU_DTRACE_UPRIV 0x0100 /* DTrace fault: bad user access */
364 #define CPU_DTRACE_TUPOFLOW 0x0200 /* DTrace fault: tuple stack overflow */
366 #define CPU_DTRACE_FAKERESTORE 0x0400 /* pid provider hint to getreg */
368 #define CPU_DTRACE_ENTRY 0x0800 /* pid provider hint to ustack() */
369 #define CPU_DTRACE_BADSTACK 0x1000 /* DTrace fault: bad stack */
371 #define CPU_DTRACE_FAULT (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \
372 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \
373 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \
374 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \
376 #define CPU_DTRACE_ERROR (CPU_DTRACE_FAULT | CPU_DTRACE_DROP)
380 * These flags must be changed only by the current CPU.
382 #define CPU_DISP_DONTSTEAL 0x01 /* CPU undergoing context swtch */
383 #define CPU_DISP_HALTED 0x02 /* CPU halted waiting for interrupt */
385 #endif /* _KERNEL || _KMEMUSER */
387 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
390 * Macros for manipulating sets of CPUs as a bitmap. Note that this
391 * bitmap may vary in size depending on the maximum CPU id a specific
392 * platform supports. This may be different than the number of CPUs
393 * the platform supports, since CPU ids can be sparse. We define two
394 * sets of macros; one for platforms where the maximum CPU id is less
395 * than the number of bits in a single word (32 in a 32-bit kernel,
396 * 64 in a 64-bit kernel), and one for platforms that require bitmaps
397 * of more than one word.
400 #define CPUSET_WORDS BT_BITOUL(NCPU)
401 #define CPUSET_NOTINSET ((uint_t)-1)
405 typedef struct cpuset {
406 ulong_t cpub[CPUSET_WORDS];
410 * Private functions for manipulating cpusets that do not fit in a
411 * single word. These should not be used directly; instead the
412 * CPUSET_* macros should be used so the code will be portable
413 * across different definitions of NCPU.
415 extern void cpuset_all(cpuset_t *);
416 extern void cpuset_all_but(cpuset_t *, uint_t);
417 extern int cpuset_isnull(cpuset_t *);
418 extern int cpuset_cmp(cpuset_t *, cpuset_t *);
419 extern void cpuset_only(cpuset_t *, uint_t);
420 extern uint_t cpuset_find(cpuset_t *);
421 extern void cpuset_bounds(cpuset_t *, uint_t *, uint_t *);
423 #define CPUSET_ALL(set) cpuset_all(&(set))
424 #define CPUSET_ALL_BUT(set, cpu) cpuset_all_but(&(set), cpu)
425 #define CPUSET_ONLY(set, cpu) cpuset_only(&(set), cpu)
426 #define CPU_IN_SET(set, cpu) BT_TEST((set).cpub, cpu)
427 #define CPUSET_ADD(set, cpu) BT_SET((set).cpub, cpu)
428 #define CPUSET_DEL(set, cpu) BT_CLEAR((set).cpub, cpu)
429 #define CPUSET_ISNULL(set) cpuset_isnull(&(set))
430 #define CPUSET_ISEQUAL(set1, set2) cpuset_cmp(&(set1), &(set2))
433 * Find one CPU in the cpuset.
434 * Sets "cpu" to the id of the found CPU, or CPUSET_NOTINSET if no cpu
435 * could be found. (i.e. empty set)
437 #define CPUSET_FIND(set, cpu) { \
438 cpu = cpuset_find(&(set)); \
442 * Determine the smallest and largest CPU id in the set. Returns
443 * CPUSET_NOTINSET in smallest and largest when set is empty.
445 #define CPUSET_BOUNDS(set, smallest, largest) { \
446 cpuset_bounds(&(set), &(smallest), &(largest)); \
450 * Atomic cpuset operations
451 * These are safe to use for concurrent cpuset manipulations.
452 * "xdel" and "xadd" are exclusive operations, that set "result" to "0"
453 * if the add or del was successful, or "-1" if not successful.
454 * (e.g. attempting to add a cpu to a cpuset that's already there, or
455 * deleting a cpu that's not in the cpuset)
458 #define CPUSET_ATOMIC_DEL(set, cpu) BT_ATOMIC_CLEAR((set).cpub, (cpu))
459 #define CPUSET_ATOMIC_ADD(set, cpu) BT_ATOMIC_SET((set).cpub, (cpu))
461 #define CPUSET_ATOMIC_XADD(set, cpu, result) \
462 BT_ATOMIC_SET_EXCL((set).cpub, cpu, result)
464 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \
465 BT_ATOMIC_CLEAR_EXCL((set).cpub, cpu, result)
468 #define CPUSET_OR(set1, set2) { \
470 for (_i = 0; _i < CPUSET_WORDS; _i++) \
471 (set1).cpub[_i] |= (set2).cpub[_i]; \
474 #define CPUSET_XOR(set1, set2) { \
476 for (_i = 0; _i < CPUSET_WORDS; _i++) \
477 (set1).cpub[_i] ^= (set2).cpub[_i]; \
480 #define CPUSET_AND(set1, set2) { \
482 for (_i = 0; _i < CPUSET_WORDS; _i++) \
483 (set1).cpub[_i] &= (set2).cpub[_i]; \
486 #define CPUSET_ZERO(set) { \
488 for (_i = 0; _i < CPUSET_WORDS; _i++) \
489 (set).cpub[_i] = 0; \
492 #elif CPUSET_WORDS == 1
494 typedef ulong_t cpuset_t; /* a set of CPUs */
496 #define CPUSET(cpu) (1UL << (cpu))
498 #define CPUSET_ALL(set) ((void)((set) = ~0UL))
499 #define CPUSET_ALL_BUT(set, cpu) ((void)((set) = ~CPUSET(cpu)))
500 #define CPUSET_ONLY(set, cpu) ((void)((set) = CPUSET(cpu)))
501 #define CPU_IN_SET(set, cpu) ((set) & CPUSET(cpu))
502 #define CPUSET_ADD(set, cpu) ((void)((set) |= CPUSET(cpu)))
503 #define CPUSET_DEL(set, cpu) ((void)((set) &= ~CPUSET(cpu)))
504 #define CPUSET_ISNULL(set) ((set) == 0)
505 #define CPUSET_ISEQUAL(set1, set2) ((set1) == (set2))
506 #define CPUSET_OR(set1, set2) ((void)((set1) |= (set2)))
507 #define CPUSET_XOR(set1, set2) ((void)((set1) ^= (set2)))
508 #define CPUSET_AND(set1, set2) ((void)((set1) &= (set2)))
509 #define CPUSET_ZERO(set) ((void)((set) = 0))
511 #define CPUSET_FIND(set, cpu) { \
512 cpu = (uint_t)(lowbit(set) - 1); \
515 #define CPUSET_BOUNDS(set, smallest, largest) { \
516 smallest = (uint_t)(lowbit(set) - 1); \
517 largest = (uint_t)(highbit(set) - 1); \
520 #define CPUSET_ATOMIC_DEL(set, cpu) atomic_and_ulong(&(set), ~CPUSET(cpu))
521 #define CPUSET_ATOMIC_ADD(set, cpu) atomic_or_ulong(&(set), CPUSET(cpu))
523 #define CPUSET_ATOMIC_XADD(set, cpu, result) \
524 { result = atomic_set_long_excl(&(set), (cpu)); }
526 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \
527 { result = atomic_clear_long_excl(&(set), (cpu)); }
529 #else /* CPUSET_WORDS <= 0 */
531 #error NCPU is undefined or invalid
533 #endif /* CPUSET_WORDS */
535 extern cpuset_t cpu_seqid_inuse;
537 #endif /* (_KERNEL || _KMEMUSER) && _MACHDEP */
539 #define CPU_CPR_OFFLINE 0x0
540 #define CPU_CPR_ONLINE 0x1
541 #define CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0)
542 #define CPU_CPR_IS_ONLINE(cpu) ((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE)
543 #define CPU_SET_CPR_FLAGS(cpu, flag) ((cpu)->cpu_cpr_flags |= flag)
545 #if defined(_KERNEL) || defined(_KMEMUSER)
547 extern struct cpu *cpu[]; /* indexed by CPU number */
548 extern struct cpu **cpu_seq; /* indexed by sequential CPU id */
549 extern cpu_t *cpu_list; /* list of CPUs */
550 extern cpu_t *cpu_active; /* list of active CPUs */
551 extern int ncpus; /* number of CPUs present */
552 extern int ncpus_online; /* number of CPUs not quiesced */
553 extern int max_ncpus; /* max present before ncpus is known */
554 extern int boot_max_ncpus; /* like max_ncpus but for real */
555 extern int boot_ncpus; /* # cpus present @ boot */
556 extern processorid_t max_cpuid; /* maximum CPU number */
557 extern struct cpu *cpu_inmotion; /* offline or partition move target */
558 extern cpu_t *clock_cpu_list;
559 extern processorid_t max_cpu_seqid_ever; /* maximum seqid ever given */
561 #if defined(__i386) || defined(__amd64)
562 extern struct cpu *curcpup(void);
563 #define CPU (curcpup()) /* Pointer to current CPU */
565 #define CPU (curthread->t_cpu) /* Pointer to current CPU */
569 * CPU_CURRENT indicates to thread_affinity_set to use CPU->cpu_id
570 * as the target and to grab cpu_lock instead of requiring the caller
573 #define CPU_CURRENT -3
578 * cpu_stats_t contains numerous system and VM-related statistics, in the form
579 * of gauges or monotonically-increasing event occurrence counts.
582 #define CPU_STATS_ENTER_K() kpreempt_disable()
583 #define CPU_STATS_EXIT_K() kpreempt_enable()
585 #define CPU_STATS_ADD_K(class, stat, amount) \
586 { kpreempt_disable(); /* keep from switching CPUs */\
587 CPU_STATS_ADDQ(CPU, class, stat, amount); \
591 #define CPU_STATS_ADDQ(cp, class, stat, amount) { \
592 extern void __dtrace_probe___cpu_##class##info_##stat(uint_t, \
593 uint64_t *, cpu_t *); \
594 uint64_t *stataddr = &((cp)->cpu_stats.class.stat); \
595 __dtrace_probe___cpu_##class##info_##stat((amount), \
597 *(stataddr) += (amount); \
600 #define CPU_STATS(cp, stat) \
601 ((cp)->cpu_stats.stat)
604 * Increment CPU generation value.
605 * This macro should be called whenever CPU goes on-line or off-line.
606 * Updates to cpu_generation should be protected by cpu_lock.
608 #define CPU_NEW_GENERATION(cp) ((cp)->cpu_generation++)
610 #endif /* _KERNEL || _KMEMUSER */
613 * CPU support routines.
615 #if defined(_KERNEL) && defined(__STDC__) /* not for genassym.c */
619 void cpu_list_init(cpu_t *);
620 void cpu_add_unit(cpu_t *);
621 void cpu_del_unit(int cpuid);
622 void cpu_add_active(cpu_t *);
623 void cpu_kstat_init(cpu_t *);
624 void cpu_visibility_add(cpu_t *, struct zone *);
625 void cpu_visibility_remove(cpu_t *, struct zone *);
626 void cpu_visibility_configure(cpu_t *, struct zone *);
627 void cpu_visibility_unconfigure(cpu_t *, struct zone *);
628 void cpu_visibility_online(cpu_t *, struct zone *);
629 void cpu_visibility_offline(cpu_t *, struct zone *);
630 void cpu_create_intrstat(cpu_t *);
631 void cpu_delete_intrstat(cpu_t *);
632 int cpu_kstat_intrstat_update(kstat_t *, int);
633 void cpu_intr_swtch_enter(kthread_t *);
634 void cpu_intr_swtch_exit(kthread_t *);
636 void mbox_lock_init(void); /* initialize cross-call locks */
637 void mbox_init(int cpun); /* initialize cross-calls */
638 void poke_cpu(int cpun); /* interrupt another CPU (to preempt) */
641 * values for safe_list. Pause state that CPUs are in.
643 #define PAUSE_IDLE 0 /* normal state */
644 #define PAUSE_READY 1 /* paused thread ready to spl */
645 #define PAUSE_WAIT 2 /* paused thread is spl-ed high */
646 #define PAUSE_DIE 3 /* tell pause thread to leave */
647 #define PAUSE_DEAD 4 /* pause thread has left */
649 void mach_cpu_pause(volatile char *);
651 void pause_cpus(cpu_t *off_cp, void *(*func)(void *));
652 void start_cpus(void);
653 int cpus_paused(void);
655 void cpu_pause_init(void);
656 cpu_t *cpu_get(processorid_t cpun); /* get the CPU struct associated */
658 int cpu_online(cpu_t *cp); /* take cpu online */
659 int cpu_offline(cpu_t *cp, int flags); /* take cpu offline */
660 int cpu_spare(cpu_t *cp, int flags); /* take cpu to spare */
661 int cpu_faulted(cpu_t *cp, int flags); /* take cpu to faulted */
662 int cpu_poweron(cpu_t *cp); /* take powered-off cpu to offline */
663 int cpu_poweroff(cpu_t *cp); /* take offline cpu to powered-off */
665 cpu_t *cpu_intr_next(cpu_t *cp); /* get next online CPU taking intrs */
666 int cpu_intr_count(cpu_t *cp); /* count # of CPUs handling intrs */
667 int cpu_intr_on(cpu_t *cp); /* CPU taking I/O interrupts? */
668 void cpu_intr_enable(cpu_t *cp); /* enable I/O interrupts */
669 int cpu_intr_disable(cpu_t *cp); /* disable I/O interrupts */
670 void cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */
673 * Routines for checking CPU states.
675 int cpu_is_online(cpu_t *); /* check if CPU is online */
676 int cpu_is_nointr(cpu_t *); /* check if CPU can service intrs */
677 int cpu_is_active(cpu_t *); /* check if CPU can run threads */
678 int cpu_is_offline(cpu_t *); /* check if CPU is offline */
679 int cpu_is_poweredoff(cpu_t *); /* check if CPU is powered off */
681 int cpu_flagged_online(cpu_flag_t); /* flags show CPU is online */
682 int cpu_flagged_nointr(cpu_flag_t); /* flags show CPU not handling intrs */
683 int cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */
684 int cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */
685 int cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */
688 * The processor_info(2) state of a CPU is a simplified representation suitable
689 * for use by an application program. Kernel subsystems should utilize the
690 * internal per-CPU state as given by the cpu_flags member of the cpu structure,
691 * as this information may include platform- or architecture-specific state
692 * critical to a subsystem's disposition of a particular CPU.
694 void cpu_set_state(cpu_t *); /* record/timestamp current state */
695 int cpu_get_state(cpu_t *); /* get current cpu state */
696 const char *cpu_get_state_str(cpu_t *); /* get current cpu state as string */
699 void cpu_set_curr_clock(uint64_t); /* indicate the current CPU's freq */
700 void cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */
703 int cpu_configure(int);
704 int cpu_unconfigure(int);
705 void cpu_destroy_bound_threads(cpu_t *cp);
707 extern int cpu_bind_thread(kthread_t *tp, processorid_t bind,
708 processorid_t *obind, int *error);
709 extern int cpu_unbind(processorid_t cpu_id, boolean_t force);
710 extern void thread_affinity_set(kthread_t *t, int cpu_id);
711 extern void thread_affinity_clear(kthread_t *t);
712 extern void affinity_set(int cpu_id);
713 extern void affinity_clear(void);
714 extern void init_cpu_mstate(struct cpu *, int);
715 extern void term_cpu_mstate(struct cpu *);
716 extern void new_cpu_mstate(int, hrtime_t);
717 extern void get_cpu_mstate(struct cpu *, hrtime_t *);
718 extern void thread_nomigrate(void);
719 extern void thread_allowmigrate(void);
720 extern void weakbinding_stop(void);
721 extern void weakbinding_start(void);
724 * The following routines affect the CPUs participation in interrupt processing,
725 * if that is applicable on the architecture. This only affects interrupts
726 * which aren't directed at the processor (not cross calls).
728 * cpu_disable_intr returns non-zero if interrupts were previously enabled.
730 int cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */
731 void cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */
734 * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus
735 * and ncpus_online counts.
737 extern kmutex_t cpu_lock; /* lock protecting CPU data */
740 * CPU state change events
742 * Various subsystems need to know when CPUs change their state. They get this
743 * information by registering CPU state change callbacks using
744 * register_cpu_setup_func(). Whenever any CPU changes its state, the callback
745 * function is called. The callback function is passed three arguments:
747 * Event, described by cpu_setup_t
749 * Transparent pointer passed when registering the callback
751 * The callback function is called with cpu_lock held. The return value from the
752 * callback function is usually ignored, except for CPU_CONFIG and CPU_UNCONFIG
753 * events. For these two events, non-zero return value indicates a failure and
754 * prevents successful completion of the operation.
756 * New events may be added in the future. Callback functions should ignore any
757 * events that they do not understand.
759 * The following events provide notification callbacks:
761 * CPU_INIT A new CPU is started and added to the list of active CPUs
762 * This event is only used during boot
764 * CPU_CONFIG A newly inserted CPU is prepared for starting running code
765 * This event is called by DR code
767 * CPU_UNCONFIG CPU has been powered off and needs cleanup
768 * This event is called by DR code
770 * CPU_ON CPU is enabled but does not run anything yet
772 * CPU_INTR_ON CPU is enabled and has interrupts enabled
774 * CPU_OFF CPU is going offline but can still run threads
776 * CPU_CPUPART_OUT CPU is going to move out of its partition
778 * CPU_CPUPART_IN CPU is going to move to a new partition
780 * CPU_SETUP CPU is set up during boot and can run threads
794 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
797 * Routines used to register interest in cpu's being added to or removed
800 extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
801 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
802 extern void cpu_state_change_notify(int, cpu_setup_t);
805 * Call specified function on the given CPU
807 typedef void (*cpu_call_func_t)(uintptr_t, uintptr_t);
808 extern void cpu_call(cpu_t *, cpu_call_func_t, uintptr_t, uintptr_t);
812 * Create various strings that describe the given CPU for the
813 * processor_info system call and configuration-related kstats.
815 #define CPU_IDSTRLEN 100
817 extern void init_cpu_info(struct cpu *);
818 extern void populate_idstr(struct cpu *);
819 extern void cpu_vm_data_init(struct cpu *);
820 extern void cpu_vm_data_destroy(struct cpu *);
828 #endif /* _SYS_CPUVAR_H */