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  */
  27 
  28 #ifndef _SYS_CPUVAR_H
  29 #define _SYS_CPUVAR_H
  30 
  31 #include <sys/thread.h>
  32 #include <sys/sysinfo.h>  /* has cpu_stat_t definition */
  33 #include <sys/disp.h>
  34 #include <sys/processor.h>
  35 
  36 #include <sys/loadavg.h>
  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 
  59 /*
  60  * For fast event tracing.
  61  */
  62 struct ftrace_record;
  63 typedef struct ftrace_data {
  64         int                     ftd_state;      /* ftrace flags */
  65         kmutex_t                ftd_unused;     /* ftrace buffer lock, unused */
  66         struct ftrace_record    *ftd_cur;       /* current record */
  67         struct ftrace_record    *ftd_first;     /* first record */
  68         struct ftrace_record    *ftd_last;      /* last record */
  69 } ftrace_data_t;
  70 
  71 struct cyc_cpu;
  72 struct nvlist;
  73 
  74 /*
  75  * Per-CPU data.
  76  *
  77  * Be careful adding new members: if they are not the same in all modules (e.g.
  78  * change size depending on a #define), CTF uniquification can fail to work
  79  * properly.  Furthermore, this is transitive in that it applies recursively to
  80  * all types pointed to by cpu_t.
  81  */
  82 typedef struct cpu {
  83         processorid_t   cpu_id;                 /* CPU number */
  84         processorid_t   cpu_seqid;      /* sequential CPU id (0..ncpus-1) */
  85         volatile cpu_flag_t cpu_flags;          /* flags indicating CPU state */
  86         struct cpu      *cpu_self;              /* pointer to itself */
  87         kthread_t       *cpu_thread;            /* current thread */
  88         kthread_t       *cpu_idle_thread;       /* idle thread for this CPU */
  89         kthread_t       *cpu_pause_thread;      /* pause thread for this CPU */
  90         klwp_id_t       cpu_lwp;                /* current lwp (if any) */
  91         klwp_id_t       cpu_fpowner;            /* currently loaded fpu owner */
  92         struct cpupart  *cpu_part;              /* partition with this CPU */
  93         struct lgrp_ld  *cpu_lpl;               /* pointer to this cpu's load */
  94         int             cpu_cache_offset;       /* see kmem.c for details */
  95 
  96         /*
  97          * Links to other CPUs.  It is safe to walk these lists if
  98          * one of the following is true:
  99          *      - cpu_lock held
 100          *      - preemption disabled via kpreempt_disable
 101          *      - PIL >= DISP_LEVEL
 102          *      - acting thread is an interrupt thread
 103          *      - all other CPUs are paused
 104          */
 105         struct cpu      *cpu_next;              /* next existing CPU */
 106         struct cpu      *cpu_prev;              /* prev existing CPU */
 107         struct cpu      *cpu_next_onln;         /* next online (enabled) CPU */
 108         struct cpu      *cpu_prev_onln;         /* prev online (enabled) CPU */
 109         struct cpu      *cpu_next_part;         /* next CPU in partition */
 110         struct cpu      *cpu_prev_part;         /* prev CPU in partition */
 111         struct cpu      *cpu_next_lgrp;         /* next CPU in latency group */
 112         struct cpu      *cpu_prev_lgrp;         /* prev CPU in latency group */
 113         struct cpu      *cpu_next_lpl;          /* next CPU in lgrp partition */
 114         struct cpu      *cpu_prev_lpl;
 115 
 116         struct cpu_pg   *cpu_pg;                /* cpu's processor groups */
 117 
 118         void            *cpu_reserved[4];       /* reserved for future use */
 119 
 120         /*
 121          * Scheduling variables.
 122          */
 123         disp_t          *cpu_disp;              /* dispatch queue data */
 124         /*
 125          * Note that cpu_disp is set before the CPU is added to the system
 126          * and is never modified.  Hence, no additional locking is needed
 127          * beyond what's necessary to access the cpu_t structure.
 128          */
 129         char            cpu_runrun;     /* scheduling flag - set to preempt */
 130         char            cpu_kprunrun;           /* force kernel preemption */
 131         pri_t           cpu_chosen_level;       /* priority at which cpu */
 132                                                 /* was chosen for scheduling */
 133         kthread_t       *cpu_dispthread; /* thread selected for dispatch */
 134         disp_lock_t     cpu_thread_lock; /* dispatcher lock on current thread */
 135         uint8_t         cpu_disp_flags; /* flags used by dispatcher */
 136         /*
 137          * The following field is updated when ever the cpu_dispthread
 138          * changes. Also in places, where the current thread(cpu_dispthread)
 139          * priority changes. This is used in disp_lowpri_cpu()
 140          */
 141         pri_t           cpu_dispatch_pri; /* priority of cpu_dispthread */
 142         clock_t         cpu_last_swtch; /* last time switched to new thread */
 143 
 144         /*
 145          * Interrupt data.
 146          */
 147         caddr_t         cpu_intr_stack; /* interrupt stack */
 148         kthread_t       *cpu_intr_thread; /* interrupt thread list */
 149         uint_t          cpu_intr_actv;  /* interrupt levels active (bitmask) */
 150         int             cpu_base_spl;   /* priority for highest rupt active */
 151 
 152         /*
 153          * Statistics.
 154          */
 155         cpu_stats_t     cpu_stats;              /* per-CPU statistics */
 156         struct kstat    *cpu_info_kstat;        /* kstat for cpu info */
 157 
 158         uintptr_t       cpu_profile_pc; /* kernel PC in profile interrupt */
 159         uintptr_t       cpu_profile_upc; /* user PC in profile interrupt */
 160         uintptr_t       cpu_profile_pil; /* PIL when profile interrupted */
 161 
 162         ftrace_data_t   cpu_ftrace;             /* per cpu ftrace data */
 163 
 164         clock_t         cpu_deadman_counter;    /* used by deadman() */
 165         uint_t          cpu_deadman_countdown;  /* used by deadman() */
 166 
 167         kmutex_t        cpu_cpc_ctxlock; /* protects context for idle thread */
 168         kcpc_ctx_t      *cpu_cpc_ctx;   /* performance counter context */
 169 
 170         /*
 171          * Configuration information for the processor_info system call.
 172          */
 173         processor_info_t cpu_type_info; /* config info */
 174         time_t          cpu_state_begin; /* when CPU entered current state */
 175         char            cpu_cpr_flags;  /* CPR related info */
 176         struct cyc_cpu  *cpu_cyclic;    /* per cpu cyclic subsystem data */
 177         struct squeue_set_s *cpu_squeue_set;    /* per cpu squeue set */
 178         struct nvlist   *cpu_props;     /* pool-related properties */
 179 
 180         krwlock_t       cpu_ft_lock;            /* DTrace: fasttrap lock */
 181         uintptr_t       cpu_dtrace_caller;      /* DTrace: caller, if any */
 182         hrtime_t        cpu_dtrace_chillmark;   /* DTrace: chill mark time */
 183         hrtime_t        cpu_dtrace_chilled;     /* DTrace: total chill time */
 184         uint64_t        cpu_dtrace_probes;      /* DTrace: total probes fired */
 185         hrtime_t        cpu_dtrace_nsec;        /* DTrace: ns in dtrace_probe */
 186 
 187         volatile uint16_t cpu_mstate;           /* cpu microstate */
 188         volatile uint16_t cpu_mstate_gen;       /* generation counter */
 189         volatile hrtime_t cpu_mstate_start;     /* cpu microstate start time */
 190         volatile hrtime_t cpu_acct[NCMSTATES];  /* cpu microstate data */
 191         hrtime_t        cpu_intracct[NCMSTATES]; /* interrupt mstate data */
 192         hrtime_t        cpu_waitrq;             /* cpu run-queue wait time */
 193         struct loadavg_s cpu_loadavg;           /* loadavg info for this cpu */
 194 
 195         char            *cpu_idstr;     /* for printing and debugging */
 196         char            *cpu_brandstr;  /* for printing */
 197 
 198         /*
 199          * Sum of all device interrupt weights that are currently directed at
 200          * this cpu. Cleared at start of interrupt redistribution.
 201          */
 202         int32_t         cpu_intr_weight;
 203         void            *cpu_vm_data;
 204 
 205         struct cpu_physid *cpu_physid;  /* physical associations */
 206 
 207         uint64_t        cpu_curr_clock;         /* current clock freq in Hz */
 208         char            *cpu_supp_freqs;        /* supported freqs in Hz */
 209 
 210         uintptr_t       cpu_cpcprofile_pc;      /* kernel PC in cpc interrupt */
 211         uintptr_t       cpu_cpcprofile_upc;     /* user PC in cpc interrupt */
 212 
 213         /*
 214          * Interrupt load factor used by dispatcher & softcall
 215          */
 216         hrtime_t        cpu_intrlast;   /* total interrupt time (nsec) */
 217         int             cpu_intrload;   /* interrupt load factor (0-99%) */
 218 
 219         uint_t          cpu_rotor;      /* for cheap pseudo-random numbers */
 220 
 221         struct cu_cpu_info      *cpu_cu_info;   /* capacity & util. info */
 222 
 223         /*
 224          * cpu_generation is updated whenever CPU goes on-line or off-line.
 225          * Updates to cpu_generation are protected by cpu_lock.
 226          *
 227          * See CPU_NEW_GENERATION() macro below.
 228          */
 229         volatile uint_t         cpu_generation; /* tracking on/off-line */
 230 
 231         /*
 232          * New members must be added /before/ this member, as the CTF tools
 233          * rely on this being the last field before cpu_m, so they can
 234          * correctly calculate the offset when synthetically adding the cpu_m
 235          * member in objects that do not have it.  This fixup is required for
 236          * uniquification to work correctly.
 237          */
 238         uintptr_t       cpu_m_pad;
 239 
 240 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
 241         struct machcpu  cpu_m;          /* per architecture info */
 242 #endif
 243 } cpu_t;
 244 
 245 /*
 246  * The cpu_core structure consists of per-CPU state available in any context.
 247  * On some architectures, this may mean that the page(s) containing the
 248  * NCPU-sized array of cpu_core structures must be locked in the TLB -- it
 249  * is up to the platform to assure that this is performed properly.  Note that
 250  * the structure is sized to avoid false sharing.
 251  */
 252 #define CPUC_SIZE               (sizeof (uint16_t) + sizeof (uint8_t) + \
 253                                 sizeof (uintptr_t) + sizeof (kmutex_t))
 254 #define CPUC_PADSIZE            CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE
 255 
 256 typedef struct cpu_core {
 257         uint16_t        cpuc_dtrace_flags;      /* DTrace flags */
 258         uint8_t         cpuc_dcpc_intr_state;   /* DCPC provider intr state */
 259         uint8_t         cpuc_pad[CPUC_PADSIZE]; /* padding */
 260         uintptr_t       cpuc_dtrace_illval;     /* DTrace illegal value */
 261         kmutex_t        cpuc_pid_lock;          /* DTrace pid provider lock */
 262 } cpu_core_t;
 263 
 264 #ifdef _KERNEL
 265 extern cpu_core_t cpu_core[];
 266 #endif /* _KERNEL */
 267 
 268 /*
 269  * CPU_ON_INTR() macro. Returns non-zero if currently on interrupt stack.
 270  * Note that this isn't a test for a high PIL.  For example, cpu_intr_actv
 271  * does not get updated when we go through sys_trap from TL>0 at high PIL.
 272  * getpil() should be used instead to check for PIL levels.
 273  */
 274 #define CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1))
 275 
 276 /*
 277  * Check to see if an interrupt thread might be active at a given ipl.
 278  * If so return true.
 279  * We must be conservative--it is ok to give a false yes, but a false no
 280  * will cause disaster.  (But if the situation changes after we check it is
 281  * ok--the caller is trying to ensure that an interrupt routine has been
 282  * exited).
 283  * This is used when trying to remove an interrupt handler from an autovector
 284  * list in avintr.c.
 285  */
 286 #define INTR_ACTIVE(cpup, level)        \
 287         ((level) <= LOCK_LEVEL ?     \
 288         ((cpup)->cpu_intr_actv & (1 << (level))) : (CPU_ON_INTR(cpup)))
 289 
 290 /*
 291  * CPU_PSEUDO_RANDOM() returns a per CPU value that changes each time one
 292  * looks at it. It's meant as a cheap mechanism to be incorporated in routines
 293  * wanting to avoid biasing, but where true randomness isn't needed (just
 294  * something that changes).
 295  */
 296 #define CPU_PSEUDO_RANDOM() (CPU->cpu_rotor++)
 297 
 298 #if defined(_KERNEL) || defined(_KMEMUSER)
 299 
 300 #define INTR_STACK_SIZE MAX(DEFAULTSTKSZ, PAGESIZE)
 301 
 302 /* MEMBERS PROTECTED BY "atomicity": cpu_flags */
 303 
 304 /*
 305  * Flags in the CPU structure.
 306  *
 307  * These are protected by cpu_lock (except during creation).
 308  *
 309  * Offlined-CPUs have three stages of being offline:
 310  *
 311  * CPU_ENABLE indicates that the CPU is participating in I/O interrupts
 312  * that can be directed at a number of different CPUs.  If CPU_ENABLE
 313  * is off, the CPU will not be given interrupts that can be sent elsewhere,
 314  * but will still get interrupts from devices associated with that CPU only,
 315  * and from other CPUs.
 316  *
 317  * CPU_OFFLINE indicates that the dispatcher should not allow any threads
 318  * other than interrupt threads to run on that CPU.  A CPU will not have
 319  * CPU_OFFLINE set if there are any bound threads (besides interrupts).
 320  *
 321  * CPU_QUIESCED is set if p_offline was able to completely turn idle the
 322  * CPU and it will not have to run interrupt threads.  In this case it'll
 323  * stay in the idle loop until CPU_QUIESCED is turned off.
 324  *
 325  * CPU_FROZEN is used only by CPR to mark CPUs that have been successfully
 326  * suspended (in the suspend path), or have yet to be resumed (in the resume
 327  * case).
 328  *
 329  * On some platforms CPUs can be individually powered off.
 330  * The following flags are set for powered off CPUs: CPU_QUIESCED,
 331  * CPU_OFFLINE, and CPU_POWEROFF.  The following flags are cleared:
 332  * CPU_RUNNING, CPU_READY, CPU_EXISTS, and CPU_ENABLE.
 333  */
 334 #define CPU_RUNNING     0x001           /* CPU running */
 335 #define CPU_READY       0x002           /* CPU ready for cross-calls */
 336 #define CPU_QUIESCED    0x004           /* CPU will stay in idle */
 337 #define CPU_EXISTS      0x008           /* CPU is configured */
 338 #define CPU_ENABLE      0x010           /* CPU enabled for interrupts */
 339 #define CPU_OFFLINE     0x020           /* CPU offline via p_online */
 340 #define CPU_POWEROFF    0x040           /* CPU is powered off */
 341 #define CPU_FROZEN      0x080           /* CPU is frozen via CPR suspend */
 342 #define CPU_SPARE       0x100           /* CPU offline available for use */
 343 #define CPU_FAULTED     0x200           /* CPU offline diagnosed faulty */
 344 
 345 #define FMT_CPU_FLAGS                                                   \
 346         "\20\12fault\11spare\10frozen"                                  \
 347         "\7poweroff\6offline\5enable\4exist\3quiesced\2ready\1run"
 348 
 349 #define CPU_ACTIVE(cpu) (((cpu)->cpu_flags & CPU_OFFLINE) == 0)
 350 
 351 /*
 352  * Flags for cpu_offline(), cpu_faulted(), and cpu_spare().
 353  */
 354 #define CPU_FORCED      0x0001          /* Force CPU offline */
 355 
 356 /*
 357  * DTrace flags.
 358  */
 359 #define CPU_DTRACE_NOFAULT      0x0001  /* Don't fault */
 360 #define CPU_DTRACE_DROP         0x0002  /* Drop this ECB */
 361 #define CPU_DTRACE_BADADDR      0x0004  /* DTrace fault: bad address */
 362 #define CPU_DTRACE_BADALIGN     0x0008  /* DTrace fault: bad alignment */
 363 #define CPU_DTRACE_DIVZERO      0x0010  /* DTrace fault: divide by zero */
 364 #define CPU_DTRACE_ILLOP        0x0020  /* DTrace fault: illegal operation */
 365 #define CPU_DTRACE_NOSCRATCH    0x0040  /* DTrace fault: out of scratch */
 366 #define CPU_DTRACE_KPRIV        0x0080  /* DTrace fault: bad kernel access */
 367 #define CPU_DTRACE_UPRIV        0x0100  /* DTrace fault: bad user access */
 368 #define CPU_DTRACE_TUPOFLOW     0x0200  /* DTrace fault: tuple stack overflow */
 369 #if defined(__sparc)
 370 #define CPU_DTRACE_FAKERESTORE  0x0400  /* pid provider hint to getreg */
 371 #endif
 372 #define CPU_DTRACE_ENTRY        0x0800  /* pid provider hint to ustack() */
 373 #define CPU_DTRACE_BADSTACK     0x1000  /* DTrace fault: bad stack */
 374 
 375 #define CPU_DTRACE_FAULT        (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \
 376                                 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \
 377                                 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \
 378                                 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \
 379                                 CPU_DTRACE_BADSTACK)
 380 #define CPU_DTRACE_ERROR        (CPU_DTRACE_FAULT | CPU_DTRACE_DROP)
 381 
 382 /*
 383  * Dispatcher flags
 384  * These flags must be changed only by the current CPU.
 385  */
 386 #define CPU_DISP_DONTSTEAL      0x01    /* CPU undergoing context swtch */
 387 #define CPU_DISP_HALTED         0x02    /* CPU halted waiting for interrupt */
 388 
 389 #endif /* _KERNEL || _KMEMUSER */
 390 
 391 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
 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     CPUSET_WORDS > 1
 408 
 409 typedef struct cpuset {
 410         ulong_t cpub[CPUSET_WORDS];
 411 } cpuset_t;
 412 
 413 /*
 414  * Private functions for manipulating cpusets that do not fit in a
 415  * single word.  These should not be used directly; instead the
 416  * CPUSET_* macros should be used so the code will be portable
 417  * across different definitions of NCPU.
 418  */
 419 extern  void    cpuset_all(cpuset_t *);
 420 extern  void    cpuset_all_but(cpuset_t *, uint_t);
 421 extern  int     cpuset_isnull(cpuset_t *);
 422 extern  int     cpuset_cmp(cpuset_t *, cpuset_t *);
 423 extern  void    cpuset_only(cpuset_t *, uint_t);
 424 extern  uint_t  cpuset_find(cpuset_t *);
 425 extern  void    cpuset_bounds(cpuset_t *, uint_t *, uint_t *);
 426 
 427 #define CPUSET_ALL(set)                 cpuset_all(&(set))
 428 #define CPUSET_ALL_BUT(set, cpu)        cpuset_all_but(&(set), cpu)
 429 #define CPUSET_ONLY(set, cpu)           cpuset_only(&(set), cpu)
 430 #define CPU_IN_SET(set, cpu)            BT_TEST((set).cpub, cpu)
 431 #define CPUSET_ADD(set, cpu)            BT_SET((set).cpub, cpu)
 432 #define CPUSET_DEL(set, cpu)            BT_CLEAR((set).cpub, cpu)
 433 #define CPUSET_ISNULL(set)              cpuset_isnull(&(set))
 434 #define CPUSET_ISEQUAL(set1, set2)      cpuset_cmp(&(set1), &(set2))
 435 
 436 /*
 437  * Find one CPU in the cpuset.
 438  * Sets "cpu" to the id of the found CPU, or CPUSET_NOTINSET if no cpu
 439  * could be found. (i.e. empty set)
 440  */
 441 #define CPUSET_FIND(set, cpu)           {               \
 442         cpu = cpuset_find(&(set));                  \
 443 }
 444 
 445 /*
 446  * Determine the smallest and largest CPU id in the set. Returns
 447  * CPUSET_NOTINSET in smallest and largest when set is empty.
 448  */
 449 #define CPUSET_BOUNDS(set, smallest, largest)   {               \
 450         cpuset_bounds(&(set), &(smallest), &(largest));             \
 451 }
 452 
 453 /*
 454  * Atomic cpuset operations
 455  * These are safe to use for concurrent cpuset manipulations.
 456  * "xdel" and "xadd" are exclusive operations, that set "result" to "0"
 457  * if the add or del was successful, or "-1" if not successful.
 458  * (e.g. attempting to add a cpu to a cpuset that's already there, or
 459  * deleting a cpu that's not in the cpuset)
 460  */
 461 
 462 #define CPUSET_ATOMIC_DEL(set, cpu)     BT_ATOMIC_CLEAR((set).cpub, (cpu))
 463 #define CPUSET_ATOMIC_ADD(set, cpu)     BT_ATOMIC_SET((set).cpub, (cpu))
 464 
 465 #define CPUSET_ATOMIC_XADD(set, cpu, result) \
 466         BT_ATOMIC_SET_EXCL((set).cpub, cpu, result)
 467 
 468 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \
 469         BT_ATOMIC_CLEAR_EXCL((set).cpub, cpu, result)
 470 
 471 
 472 #define CPUSET_OR(set1, set2)           {               \
 473         int _i;                                         \
 474         for (_i = 0; _i < CPUSET_WORDS; _i++)                \
 475                 (set1).cpub[_i] |= (set2).cpub[_i];     \
 476 }
 477 
 478 #define CPUSET_XOR(set1, set2)          {               \
 479         int _i;                                         \
 480         for (_i = 0; _i < CPUSET_WORDS; _i++)                \
 481                 (set1).cpub[_i] ^= (set2).cpub[_i];     \
 482 }
 483 
 484 #define CPUSET_AND(set1, set2)          {               \
 485         int _i;                                         \
 486         for (_i = 0; _i < CPUSET_WORDS; _i++)                \
 487                 (set1).cpub[_i] &= (set2).cpub[_i]; \
 488 }
 489 
 490 #define CPUSET_ZERO(set)                {               \
 491         int _i;                                         \
 492         for (_i = 0; _i < CPUSET_WORDS; _i++)                \
 493                 (set).cpub[_i] = 0;                     \
 494 }
 495 
 496 #elif   CPUSET_WORDS == 1
 497 
 498 typedef ulong_t cpuset_t;       /* a set of CPUs */
 499 
 500 #define CPUSET(cpu)                     (1UL << (cpu))
 501 
 502 #define CPUSET_ALL(set)                 ((void)((set) = ~0UL))
 503 #define CPUSET_ALL_BUT(set, cpu)        ((void)((set) = ~CPUSET(cpu)))
 504 #define CPUSET_ONLY(set, cpu)           ((void)((set) = CPUSET(cpu)))
 505 #define CPU_IN_SET(set, cpu)            ((set) & CPUSET(cpu))
 506 #define CPUSET_ADD(set, cpu)            ((void)((set) |= CPUSET(cpu)))
 507 #define CPUSET_DEL(set, cpu)            ((void)((set) &= ~CPUSET(cpu)))
 508 #define CPUSET_ISNULL(set)              ((set) == 0)
 509 #define CPUSET_ISEQUAL(set1, set2)      ((set1) == (set2))
 510 #define CPUSET_OR(set1, set2)           ((void)((set1) |= (set2)))
 511 #define CPUSET_XOR(set1, set2)          ((void)((set1) ^= (set2)))
 512 #define CPUSET_AND(set1, set2)          ((void)((set1) &= (set2)))
 513 #define CPUSET_ZERO(set)                ((void)((set) = 0))
 514 
 515 #define CPUSET_FIND(set, cpu)           {               \
 516         cpu = (uint_t)(lowbit(set) - 1);                                \
 517 }
 518 
 519 #define CPUSET_BOUNDS(set, smallest, largest)   {       \
 520         smallest = (uint_t)(lowbit(set) - 1);           \
 521         largest = (uint_t)(highbit(set) - 1);           \
 522 }
 523 
 524 #define CPUSET_ATOMIC_DEL(set, cpu)     atomic_and_ulong(&(set), ~CPUSET(cpu))
 525 #define CPUSET_ATOMIC_ADD(set, cpu)     atomic_or_ulong(&(set), CPUSET(cpu))
 526 
 527 #define CPUSET_ATOMIC_XADD(set, cpu, result) \
 528         { result = atomic_set_long_excl(&(set), (cpu)); }
 529 
 530 #define CPUSET_ATOMIC_XDEL(set, cpu, result) \
 531         { result = atomic_clear_long_excl(&(set), (cpu)); }
 532 
 533 #else   /* CPUSET_WORDS <= 0 */
 534 
 535 #error NCPU is undefined or invalid
 536 
 537 #endif  /* CPUSET_WORDS */
 538 
 539 extern cpuset_t cpu_seqid_inuse;
 540 
 541 #endif  /* (_KERNEL || _KMEMUSER) && _MACHDEP */
 542 
 543 #define CPU_CPR_OFFLINE         0x0
 544 #define CPU_CPR_ONLINE          0x1
 545 #define CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0)
 546 #define CPU_CPR_IS_ONLINE(cpu)  ((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE)
 547 #define CPU_SET_CPR_FLAGS(cpu, flag)    ((cpu)->cpu_cpr_flags |= flag)
 548 
 549 #if defined(_KERNEL) || defined(_KMEMUSER)
 550 
 551 extern struct cpu       *cpu[];         /* indexed by CPU number */
 552 extern struct cpu       **cpu_seq;      /* indexed by sequential CPU id */
 553 extern cpu_t            *cpu_list;      /* list of CPUs */
 554 extern cpu_t            *cpu_active;    /* list of active CPUs */
 555 extern int              ncpus;          /* number of CPUs present */
 556 extern int              ncpus_online;   /* number of CPUs not quiesced */
 557 extern int              max_ncpus;      /* max present before ncpus is known */
 558 extern int              boot_max_ncpus; /* like max_ncpus but for real */
 559 extern int              boot_ncpus;     /* # cpus present @ boot */
 560 extern processorid_t    max_cpuid;      /* maximum CPU number */
 561 extern struct cpu       *cpu_inmotion;  /* offline or partition move target */
 562 extern cpu_t            *clock_cpu_list;
 563 extern processorid_t    max_cpu_seqid_ever;     /* maximum seqid ever given */
 564 
 565 #if defined(__i386) || defined(__amd64)
 566 extern struct cpu *curcpup(void);
 567 #define CPU             (curcpup())     /* Pointer to current CPU */
 568 #else
 569 #define CPU             (curthread->t_cpu)   /* Pointer to current CPU */
 570 #endif
 571 
 572 /*
 573  * CPU_CURRENT indicates to thread_affinity_set to use CPU->cpu_id
 574  * as the target and to grab cpu_lock instead of requiring the caller
 575  * to grab it.
 576  */
 577 #define CPU_CURRENT     -3
 578 
 579 /*
 580  * Per-CPU statistics
 581  *
 582  * cpu_stats_t contains numerous system and VM-related statistics, in the form
 583  * of gauges or monotonically-increasing event occurrence counts.
 584  */
 585 
 586 #define CPU_STATS_ENTER_K()     kpreempt_disable()
 587 #define CPU_STATS_EXIT_K()      kpreempt_enable()
 588 
 589 #define CPU_STATS_ADD_K(class, stat, amount) \
 590         {       kpreempt_disable(); /* keep from switching CPUs */\
 591                 CPU_STATS_ADDQ(CPU, class, stat, amount); \
 592                 kpreempt_enable(); \
 593         }
 594 
 595 #define CPU_STATS_ADDQ(cp, class, stat, amount) {                       \
 596         extern void __dtrace_probe___cpu_##class##info_##stat(uint_t,   \
 597             uint64_t *, cpu_t *);                                       \
 598         uint64_t *stataddr = &((cp)->cpu_stats.class.stat);              \
 599         __dtrace_probe___cpu_##class##info_##stat((amount),             \
 600             stataddr, cp);                                              \
 601         *(stataddr) += (amount);                                        \
 602 }
 603 
 604 #define CPU_STATS(cp, stat)                                       \
 605         ((cp)->cpu_stats.stat)
 606 
 607 /*
 608  * Increment CPU generation value.
 609  * This macro should be called whenever CPU goes on-line or off-line.
 610  * Updates to cpu_generation should be protected by cpu_lock.
 611  */
 612 #define CPU_NEW_GENERATION(cp)  ((cp)->cpu_generation++)
 613 
 614 #endif /* _KERNEL || _KMEMUSER */
 615 
 616 /*
 617  * CPU support routines.
 618  */
 619 #if     defined(_KERNEL) && defined(__STDC__)   /* not for genassym.c */
 620 
 621 struct zone;
 622 
 623 void    cpu_list_init(cpu_t *);
 624 void    cpu_add_unit(cpu_t *);
 625 void    cpu_del_unit(int cpuid);
 626 void    cpu_add_active(cpu_t *);
 627 void    cpu_kstat_init(cpu_t *);
 628 void    cpu_visibility_add(cpu_t *, struct zone *);
 629 void    cpu_visibility_remove(cpu_t *, struct zone *);
 630 void    cpu_visibility_configure(cpu_t *, struct zone *);
 631 void    cpu_visibility_unconfigure(cpu_t *, struct zone *);
 632 void    cpu_visibility_online(cpu_t *, struct zone *);
 633 void    cpu_visibility_offline(cpu_t *, struct zone *);
 634 void    cpu_create_intrstat(cpu_t *);
 635 void    cpu_delete_intrstat(cpu_t *);
 636 int     cpu_kstat_intrstat_update(kstat_t *, int);
 637 void    cpu_intr_swtch_enter(kthread_t *);
 638 void    cpu_intr_swtch_exit(kthread_t *);
 639 
 640 void    mbox_lock_init(void);    /* initialize cross-call locks */
 641 void    mbox_init(int cpun);     /* initialize cross-calls */
 642 void    poke_cpu(int cpun);      /* interrupt another CPU (to preempt) */
 643 
 644 /*
 645  * values for safe_list.  Pause state that CPUs are in.
 646  */
 647 #define PAUSE_IDLE      0               /* normal state */
 648 #define PAUSE_READY     1               /* paused thread ready to spl */
 649 #define PAUSE_WAIT      2               /* paused thread is spl-ed high */
 650 #define PAUSE_DIE       3               /* tell pause thread to leave */
 651 #define PAUSE_DEAD      4               /* pause thread has left */
 652 
 653 void    mach_cpu_pause(volatile char *);
 654 
 655 void    pause_cpus(cpu_t *off_cp, void *(*func)(void *));
 656 void    start_cpus(void);
 657 int     cpus_paused(void);
 658 
 659 void    cpu_pause_init(void);
 660 cpu_t   *cpu_get(processorid_t cpun);   /* get the CPU struct associated */
 661 
 662 int     cpu_online(cpu_t *cp);                  /* take cpu online */
 663 int     cpu_offline(cpu_t *cp, int flags);      /* take cpu offline */
 664 int     cpu_spare(cpu_t *cp, int flags);        /* take cpu to spare */
 665 int     cpu_faulted(cpu_t *cp, int flags);      /* take cpu to faulted */
 666 int     cpu_poweron(cpu_t *cp);         /* take powered-off cpu to offline */
 667 int     cpu_poweroff(cpu_t *cp);        /* take offline cpu to powered-off */
 668 
 669 cpu_t   *cpu_intr_next(cpu_t *cp);      /* get next online CPU taking intrs */
 670 int     cpu_intr_count(cpu_t *cp);      /* count # of CPUs handling intrs */
 671 int     cpu_intr_on(cpu_t *cp);         /* CPU taking I/O interrupts? */
 672 void    cpu_intr_enable(cpu_t *cp);     /* enable I/O interrupts */
 673 int     cpu_intr_disable(cpu_t *cp);    /* disable I/O interrupts */
 674 void    cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */
 675 
 676 /*
 677  * Routines for checking CPU states.
 678  */
 679 int     cpu_is_online(cpu_t *);         /* check if CPU is online */
 680 int     cpu_is_nointr(cpu_t *);         /* check if CPU can service intrs */
 681 int     cpu_is_active(cpu_t *);         /* check if CPU can run threads */
 682 int     cpu_is_offline(cpu_t *);        /* check if CPU is offline */
 683 int     cpu_is_poweredoff(cpu_t *);     /* check if CPU is powered off */
 684 
 685 int     cpu_flagged_online(cpu_flag_t); /* flags show CPU is online */
 686 int     cpu_flagged_nointr(cpu_flag_t); /* flags show CPU not handling intrs */
 687 int     cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */
 688 int     cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */
 689 int     cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */
 690 
 691 /*
 692  * The processor_info(2) state of a CPU is a simplified representation suitable
 693  * for use by an application program.  Kernel subsystems should utilize the
 694  * internal per-CPU state as given by the cpu_flags member of the cpu structure,
 695  * as this information may include platform- or architecture-specific state
 696  * critical to a subsystem's disposition of a particular CPU.
 697  */
 698 void    cpu_set_state(cpu_t *);         /* record/timestamp current state */
 699 int     cpu_get_state(cpu_t *);         /* get current cpu state */
 700 const char *cpu_get_state_str(cpu_t *); /* get current cpu state as string */
 701 
 702 
 703 void    cpu_set_curr_clock(uint64_t);   /* indicate the current CPU's freq */
 704 void    cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */
 705                                                 /* frequencies */
 706 
 707 int     cpu_configure(int);
 708 int     cpu_unconfigure(int);
 709 void    cpu_destroy_bound_threads(cpu_t *cp);
 710 
 711 extern int cpu_bind_thread(kthread_t *tp, processorid_t bind,
 712     processorid_t *obind, int *error);
 713 extern int cpu_unbind(processorid_t cpu_id, boolean_t force);
 714 extern void thread_affinity_set(kthread_t *t, int cpu_id);
 715 extern void thread_affinity_clear(kthread_t *t);
 716 extern void affinity_set(int cpu_id);
 717 extern void affinity_clear(void);
 718 extern void init_cpu_mstate(struct cpu *, int);
 719 extern void term_cpu_mstate(struct cpu *);
 720 extern void new_cpu_mstate(int, hrtime_t);
 721 extern void get_cpu_mstate(struct cpu *, hrtime_t *);
 722 extern void thread_nomigrate(void);
 723 extern void thread_allowmigrate(void);
 724 extern void weakbinding_stop(void);
 725 extern void weakbinding_start(void);
 726 
 727 /*
 728  * The following routines affect the CPUs participation in interrupt processing,
 729  * if that is applicable on the architecture.  This only affects interrupts
 730  * which aren't directed at the processor (not cross calls).
 731  *
 732  * cpu_disable_intr returns non-zero if interrupts were previously enabled.
 733  */
 734 int     cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */
 735 void    cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */
 736 
 737 /*
 738  * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus
 739  * and ncpus_online counts.
 740  */
 741 extern kmutex_t cpu_lock;       /* lock protecting CPU data */
 742 
 743 /*
 744  * CPU state change events
 745  *
 746  * Various subsystems need to know when CPUs change their state. They get this
 747  * information by registering  CPU state change callbacks using
 748  * register_cpu_setup_func(). Whenever any CPU changes its state, the callback
 749  * function is called. The callback function is passed three arguments:
 750  *
 751  *   Event, described by cpu_setup_t
 752  *   CPU ID
 753  *   Transparent pointer passed when registering the callback
 754  *
 755  * The callback function is called with cpu_lock held. The return value from the
 756  * callback function is usually ignored, except for CPU_CONFIG and CPU_UNCONFIG
 757  * events. For these two events, non-zero return value indicates a failure and
 758  * prevents successful completion of the operation.
 759  *
 760  * New events may be added in the future. Callback functions should ignore any
 761  * events that they do not understand.
 762  *
 763  * The following events provide notification callbacks:
 764  *
 765  *  CPU_INIT    A new CPU is started and added to the list of active CPUs
 766  *                This event is only used during boot
 767  *
 768  *  CPU_CONFIG  A newly inserted CPU is prepared for starting running code
 769  *                This event is called by DR code
 770  *
 771  *  CPU_UNCONFIG CPU has been powered off and needs cleanup
 772  *                This event is called by DR code
 773  *
 774  *  CPU_ON      CPU is enabled but does not run anything yet
 775  *
 776  *  CPU_INTR_ON CPU is enabled and has interrupts enabled
 777  *
 778  *  CPU_OFF     CPU is going offline but can still run threads
 779  *
 780  *  CPU_CPUPART_OUT     CPU is going to move out of its partition
 781  *
 782  *  CPU_CPUPART_IN      CPU is going to move to a new partition
 783  *
 784  *  CPU_SETUP   CPU is set up during boot and can run threads
 785  */
 786 typedef enum {
 787         CPU_INIT,
 788         CPU_CONFIG,
 789         CPU_UNCONFIG,
 790         CPU_ON,
 791         CPU_OFF,
 792         CPU_CPUPART_IN,
 793         CPU_CPUPART_OUT,
 794         CPU_SETUP,
 795         CPU_INTR_ON
 796 } cpu_setup_t;
 797 
 798 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
 799 
 800 /*
 801  * Routines used to register interest in cpu's being added to or removed
 802  * from the system.
 803  */
 804 extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
 805 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
 806 extern void cpu_state_change_notify(int, cpu_setup_t);
 807 
 808 /*
 809  * Call specified function on the given CPU
 810  */
 811 typedef void (*cpu_call_func_t)(uintptr_t, uintptr_t);
 812 extern void cpu_call(cpu_t *, cpu_call_func_t, uintptr_t, uintptr_t);
 813 
 814 
 815 /*
 816  * Create various strings that describe the given CPU for the
 817  * processor_info system call and configuration-related kstats.
 818  */
 819 #define CPU_IDSTRLEN    100
 820 
 821 extern void init_cpu_info(struct cpu *);
 822 extern void populate_idstr(struct cpu *);
 823 extern void cpu_vm_data_init(struct cpu *);
 824 extern void cpu_vm_data_destroy(struct cpu *);
 825 
 826 #endif  /* _KERNEL */
 827 
 828 #ifdef  __cplusplus
 829 }
 830 #endif
 831 
 832 #endif /* _SYS_CPUVAR_H */