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 * On some platforms CPUs can be individually powered off.
334 * The following flags are set for powered off CPUs: CPU_QUIESCED,
335 * CPU_OFFLINE, and CPU_POWEROFF. The following flags are cleared:
336 * CPU_RUNNING, CPU_READY, CPU_EXISTS, and CPU_ENABLE.
337 */
338 #define CPU_RUNNING 0x001 /* CPU running */
339 #define CPU_READY 0x002 /* CPU ready for cross-calls */
340 #define CPU_QUIESCED 0x004 /* CPU will stay in idle */
341 #define CPU_EXISTS 0x008 /* CPU is configured */
342 #define CPU_ENABLE 0x010 /* CPU enabled for interrupts */
343 #define CPU_OFFLINE 0x020 /* CPU offline via p_online */
344 #define CPU_POWEROFF 0x040 /* CPU is powered off */
345 #define CPU_FROZEN 0x080 /* CPU is frozen via CPR suspend */
346 #define CPU_SPARE 0x100 /* CPU offline available for use */
347 #define CPU_FAULTED 0x200 /* CPU offline diagnosed faulty */
348
349 #define FMT_CPU_FLAGS \
350 "\20\12fault\11spare\10frozen" \
351 "\7poweroff\6offline\5enable\4exist\3quiesced\2ready\1run"
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 max_ncpus; /* max present before ncpus is known */
518 extern int boot_max_ncpus; /* like max_ncpus but for real */
519 extern int boot_ncpus; /* # cpus present @ boot */
520 extern processorid_t max_cpuid; /* maximum CPU number */
521 extern struct cpu *cpu_inmotion; /* offline or partition move target */
522 extern cpu_t *clock_cpu_list;
523 extern processorid_t max_cpu_seqid_ever; /* maximum seqid ever given */
524
525 #if defined(__i386) || defined(__amd64)
526 extern struct cpu *curcpup(void);
527 #define CPU (curcpup()) /* Pointer to current CPU */
528 #else
529 #define CPU (curthread->t_cpu) /* Pointer to current CPU */
530 #endif
531
532 /*
533 * CPU_CURRENT indicates to thread_affinity_set() to use whatever curthread's
534 * current CPU is; holding cpu_lock is not required.
535 */
536 #define CPU_CURRENT -3
537
538 /*
539 * CPU_BEST can be used by thread_affinity_set() callers to set affinity to a
540 * good CPU (in particular, an ht_acquire()-friendly choice); holding cpu_lock
541 * is not required.
542 */
543 #define CPU_BEST -4
544
545 /*
546 * Per-CPU statistics
547 *
548 * cpu_stats_t contains numerous system and VM-related statistics, in the form
549 * of gauges or monotonically-increasing event occurrence counts.
550 */
551
552 #define CPU_STATS_ENTER_K() kpreempt_disable()
553 #define CPU_STATS_EXIT_K() kpreempt_enable()
554
555 #define CPU_STATS_ADD_K(class, stat, amount) \
556 { kpreempt_disable(); /* keep from switching CPUs */\
557 CPU_STATS_ADDQ(CPU, class, stat, amount); \
558 kpreempt_enable(); \
559 }
560
561 #define CPU_STATS_ADDQ(cp, class, stat, amount) { \
562 extern void __dtrace_probe___cpu_##class##info_##stat(uint_t, \
563 uint64_t *, cpu_t *); \
564 uint64_t *stataddr = &((cp)->cpu_stats.class.stat); \
565 __dtrace_probe___cpu_##class##info_##stat((amount), \
566 stataddr, cp); \
567 *(stataddr) += (amount); \
568 }
569
570 #define CPU_STATS(cp, stat) \
571 ((cp)->cpu_stats.stat)
572
573 /*
574 * Increment CPU generation value.
575 * This macro should be called whenever CPU goes on-line or off-line.
576 * Updates to cpu_generation should be protected by cpu_lock.
577 */
578 #define CPU_NEW_GENERATION(cp) ((cp)->cpu_generation++)
579
580 #endif /* defined(_KERNEL) || defined(_KMEMUSER) */
581
582 #define CPU_CPR_OFFLINE 0x0
583 #define CPU_CPR_ONLINE 0x1
584 #define CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0)
585 #define CPU_CPR_IS_ONLINE(cpu) ((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE)
586 #define CPU_SET_CPR_FLAGS(cpu, flag) ((cpu)->cpu_cpr_flags |= flag)
587
588 /*
589 * CPU support routines (not for genassym.c)
590 */
591 #if (defined(_KERNEL) || defined(_FAKE_KERNEL)) && defined(__STDC__)
592
593 struct zone;
594
595 void cpu_list_init(cpu_t *);
596 void cpu_add_unit(cpu_t *);
597 void cpu_del_unit(int cpuid);
598 void cpu_add_active(cpu_t *);
599 void cpu_kstat_init(cpu_t *);
600 void cpu_visibility_add(cpu_t *, struct zone *);
601 void cpu_visibility_remove(cpu_t *, struct zone *);
602 void cpu_visibility_configure(cpu_t *, struct zone *);
603 void cpu_visibility_unconfigure(cpu_t *, struct zone *);
604 void cpu_visibility_online(cpu_t *, struct zone *);
605 void cpu_visibility_offline(cpu_t *, struct zone *);
606 void cpu_create_intrstat(cpu_t *);
607 void cpu_delete_intrstat(cpu_t *);
608 int cpu_kstat_intrstat_update(kstat_t *, int);
609 void cpu_intr_swtch_enter(kthread_t *);
610 void cpu_intr_swtch_exit(kthread_t *);
611
612 void mbox_lock_init(void); /* initialize cross-call locks */
613 void mbox_init(int cpun); /* initialize cross-calls */
614 void poke_cpu(int cpun); /* interrupt another CPU (to preempt) */
615
616 /*
617 * values for safe_list. Pause state that CPUs are in.
618 */
619 #define PAUSE_IDLE 0 /* normal state */
620 #define PAUSE_READY 1 /* paused thread ready to spl */
621 #define PAUSE_WAIT 2 /* paused thread is spl-ed high */
622 #define PAUSE_DIE 3 /* tell pause thread to leave */
623 #define PAUSE_DEAD 4 /* pause thread has left */
624
625 void mach_cpu_pause(volatile char *);
626
627 void pause_cpus(cpu_t *off_cp, void *(*func)(void *));
628 void start_cpus(void);
629 int cpus_paused(void);
630
631 void cpu_pause_init(void);
632 cpu_t *cpu_get(processorid_t cpun); /* get the CPU struct associated */
633
634 int cpu_online(cpu_t *cp); /* take cpu online */
635 int cpu_offline(cpu_t *cp, int flags); /* take cpu offline */
636 int cpu_spare(cpu_t *cp, int flags); /* take cpu to spare */
637 int cpu_faulted(cpu_t *cp, int flags); /* take cpu to faulted */
638 int cpu_poweron(cpu_t *cp); /* take powered-off cpu to offline */
639 int cpu_poweroff(cpu_t *cp); /* take offline cpu to powered-off */
640
641 cpu_t *cpu_intr_next(cpu_t *cp); /* get next online CPU taking intrs */
642 int cpu_intr_count(cpu_t *cp); /* count # of CPUs handling intrs */
643 int cpu_intr_on(cpu_t *cp); /* CPU taking I/O interrupts? */
644 void cpu_intr_enable(cpu_t *cp); /* enable I/O interrupts */
645 int cpu_intr_disable(cpu_t *cp); /* disable I/O interrupts */
646 void cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */
647
648 /*
649 * Routines for checking CPU states.
650 */
651 int cpu_is_online(cpu_t *); /* check if CPU is online */
652 int cpu_is_nointr(cpu_t *); /* check if CPU can service intrs */
653 int cpu_is_active(cpu_t *); /* check if CPU can run threads */
654 int cpu_is_offline(cpu_t *); /* check if CPU is offline */
655 int cpu_is_poweredoff(cpu_t *); /* check if CPU is powered off */
656
657 int cpu_flagged_online(cpu_flag_t); /* flags show CPU is online */
658 int cpu_flagged_nointr(cpu_flag_t); /* flags show CPU not handling intrs */
659 int cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */
660 int cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */
661 int cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */
662
663 /*
664 * The processor_info(2) state of a CPU is a simplified representation suitable
665 * for use by an application program. Kernel subsystems should utilize the
666 * internal per-CPU state as given by the cpu_flags member of the cpu structure,
667 * as this information may include platform- or architecture-specific state
668 * critical to a subsystem's disposition of a particular CPU.
669 */
670 void cpu_set_state(cpu_t *); /* record/timestamp current state */
671 int cpu_get_state(cpu_t *); /* get current cpu state */
672 const char *cpu_get_state_str(cpu_t *); /* get current cpu state as string */
673
674
675 void cpu_set_curr_clock(uint64_t); /* indicate the current CPU's freq */
676 void cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */
677 /* frequencies */
678
679 int cpu_configure(int);
680 int cpu_unconfigure(int);
681 void cpu_destroy_bound_threads(cpu_t *cp);
682
683 extern int cpu_bind_thread(kthread_t *tp, processorid_t bind,
684 processorid_t *obind, int *error);
685 extern int cpu_unbind(processorid_t cpu_id, boolean_t force);
686 extern void thread_affinity_set(kthread_t *t, int cpu_id);
687 extern void thread_affinity_clear(kthread_t *t);
688 extern void affinity_set(int cpu_id);
689 extern void affinity_clear(void);
690 extern void init_cpu_mstate(struct cpu *, int);
691 extern void term_cpu_mstate(struct cpu *);
692 extern void new_cpu_mstate(int, hrtime_t);
693 extern void get_cpu_mstate(struct cpu *, hrtime_t *);
694 extern void thread_nomigrate(void);
695 extern void thread_allowmigrate(void);
696 extern void weakbinding_stop(void);
697 extern void weakbinding_start(void);
698
699 /*
700 * The following routines affect the CPUs participation in interrupt processing,
701 * if that is applicable on the architecture. This only affects interrupts
702 * which aren't directed at the processor (not cross calls).
703 *
704 * cpu_disable_intr returns non-zero if interrupts were previously enabled.
705 */
706 int cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */
707 void cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */
708
709 /*
710 * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus
711 * and ncpus_online counts.
712 */
713 extern kmutex_t cpu_lock; /* lock protecting CPU data */
714
715 /*
716 * CPU state change events
717 *
718 * Various subsystems need to know when CPUs change their state. They get this
719 * information by registering CPU state change callbacks using
720 * register_cpu_setup_func(). Whenever any CPU changes its state, the callback
721 * function is called. The callback function is passed three arguments:
722 *
723 * Event, described by cpu_setup_t
724 * CPU ID
725 * Transparent pointer passed when registering the callback
726 *
727 * The callback function is called with cpu_lock held. The return value from the
728 * callback function is usually ignored, except for CPU_CONFIG and CPU_UNCONFIG
729 * events. For these two events, non-zero return value indicates a failure and
730 * prevents successful completion of the operation.
731 *
732 * New events may be added in the future. Callback functions should ignore any
733 * events that they do not understand.
734 *
735 * The following events provide notification callbacks:
736 *
737 * CPU_INIT A new CPU is started and added to the list of active CPUs
738 * This event is only used during boot
739 *
740 * CPU_CONFIG A newly inserted CPU is prepared for starting running code
741 * This event is called by DR code
742 *
743 * CPU_UNCONFIG CPU has been powered off and needs cleanup
744 * This event is called by DR code
745 *
746 * CPU_ON CPU is enabled but does not run anything yet
747 *
748 * CPU_INTR_ON CPU is enabled and has interrupts enabled
749 *
750 * CPU_OFF CPU is going offline but can still run threads
751 *
752 * CPU_CPUPART_OUT CPU is going to move out of its partition
753 *
754 * CPU_CPUPART_IN CPU is going to move to a new partition
755 *
756 * CPU_SETUP CPU is set up during boot and can run threads
757 */
758 typedef enum {
759 CPU_INIT,
760 CPU_CONFIG,
761 CPU_UNCONFIG,
762 CPU_ON,
763 CPU_OFF,
764 CPU_CPUPART_IN,
765 CPU_CPUPART_OUT,
766 CPU_SETUP,
767 CPU_INTR_ON
768 } cpu_setup_t;
769
770 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
771
772 /*
773 * Routines used to register interest in cpu's being added to or removed
774 * from the system.
775 */
776 extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
777 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
778 extern void cpu_state_change_notify(int, cpu_setup_t);
779
780 /*
781 * Call specified function on the given CPU
782 */
783 typedef void (*cpu_call_func_t)(uintptr_t, uintptr_t);
784 extern void cpu_call(cpu_t *, cpu_call_func_t, uintptr_t, uintptr_t);
785
786
787 /*
788 * Create various strings that describe the given CPU for the
789 * processor_info system call and configuration-related kstats.
790 */
791 #define CPU_IDSTRLEN 100
792
793 extern void init_cpu_info(struct cpu *);
794 extern void populate_idstr(struct cpu *);
795 extern void cpu_vm_data_init(struct cpu *);
796 extern void cpu_vm_data_destroy(struct cpu *);
797
798 #endif /* _KERNEL || _FAKE_KERNEL */
799
800 #ifdef __cplusplus
801 }
802 #endif
803
804 #endif /* _SYS_CPUVAR_H */