osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  58  * support for mandatory and extensible security protections.  This notice
  59  * is included in support of clause 2.2 (b) of the Apple Public License,
  60  * Version 2.0.
  61  */
  62 /*
  63  */
  64
  65 /*
  66  *      Mach kernel startup.
  67  */
  68
  69 #include <debug.h>
  70 #include <xpr_debug.h>
  71 #include <mach_kdp.h>
  72
  73 #include <mach/boolean.h>
  74 #include <mach/machine.h>
  75 #include <mach/thread_act.h>
  76 #include <mach/task_special_ports.h>
  77 #include <mach/vm_param.h>
  78 #include <ipc/ipc_init.h>
  79 #include <kern/assert.h>
  80 #include <kern/mach_param.h>
  81 #include <kern/misc_protos.h>
  82 #include <kern/clock.h>
  83 #include <kern/coalition.h>
  84 #include <kern/cpu_number.h>
  85 #include <kern/ledger.h>
  86 #include <kern/machine.h>
  87 #include <kern/processor.h>
  88 #include <kern/sched_prim.h>
  89 #if CONFIG_SCHED_SFI
  90 #include <kern/sfi.h>
  91 #endif
  92 #include <kern/startup.h>
  93 #include <kern/task.h>
  94 #include <kern/thread.h>
  95 #include <kern/timer.h>
  96 #if CONFIG_TELEMETRY
  97 #include <kern/telemetry.h>
  98 #endif
  99 #include <kern/xpr.h>
 100 #include <kern/zalloc.h>
 101 #include <kern/locks.h>
 102 #include <kern/debug.h>
 103 #include <corpses/task_corpse.h>
 104 #include <prng/random.h>
 105 #include <console/serial_protos.h>
 106 #include <vm/vm_kern.h>
 107 #include <vm/vm_init.h>
 108 #include <vm/vm_map.h>
 109 #include <vm/vm_object.h>
 110 #include <vm/vm_page.h>
 111 #include <vm/vm_pageout.h>
 112 #include <vm/vm_shared_region.h>
 113 #include <machine/pmap.h>
 114 #include <machine/commpage.h>
 115 #include <libkern/version.h>
 116 #include <sys/codesign.h>
 117 #include <sys/kdebug.h>
 118 #include <sys/random.h>
 119
 120 #include <kern/waitq.h>
 121
 122
 123 #if CONFIG_ATM
 124 #include <atm/atm_internal.h>
 125 #endif
 126
 127 #if CONFIG_CSR
 128 #include <sys/csr.h>
 129 #endif
 130
 131 #if CONFIG_BANK
 132 #include <bank/bank_internal.h>
 133 #endif
 134
 135 #if ALTERNATE_DEBUGGER
 136 #include <arm64/alternate_debugger.h>
 137 #endif
 138
 139 #if MACH_KDP
 140 #include <kdp/kdp.h>
 141 #endif
 142
 143 #if CONFIG_MACF
 144 #include <security/mac_mach_internal.h>
 145 #endif
 146
 147 #if KPC
 148 #include <kern/kpc.h>
 149 #endif
 150
 151 #if KPERF
 152 #include <kperf/kperf.h>
 153 #endif
 154
 155 #if HYPERVISOR
 156 #include <kern/hv_support.h>
 157 #endif
 158
 159
 160 #include <i386/pmCPU.h>
 161 static void             kernel_bootstrap_thread(void);
 162
 163 static void             load_context(
 164                                         thread_t        thread);
 165 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 166 extern void cpu_userwindow_init(int);
 167 extern void cpu_physwindow_init(int);
 168 #endif
 169
 170 #if CONFIG_ECC_LOGGING
 171 #include <kern/ecc.h>
 172 #endif
 173
 174 #if (defined(__i386__) || defined(__x86_64__)) && CONFIG_VMX
 175 #include <i386/vmx/vmx_cpu.h>
 176 #endif
 177
 178 // libkern/OSKextLib.cpp
 179 extern void     OSKextRemoveKextBootstrap(void);
 180
 181 void scale_setup(void);
 182 extern void bsd_scale_setup(int);
 183 extern unsigned int semaphore_max;
 184 extern void stackshot_lock_init(void);
 185
 186 /*
 187  *      Running in virtual memory, on the interrupt stack.
 188  */
 189
 190 extern int serverperfmode;
 191
 192 /* size of kernel trace buffer, disabled by default */
 193 unsigned int new_nkdbufs = 0;
 194 unsigned int wake_nkdbufs = 0;
 195 unsigned int write_trace_on_panic = 0;
 196 unsigned int trace_typefilter = 0;
 197 boolean_t    trace_serial = FALSE;
 198
 199 /* mach leak logging */
 200 int log_leaks = 0;
 201 int turn_on_log_leaks = 0;
 202
 203 static inline void
 204 kernel_bootstrap_log(const char *message)
 205 {
 206 //      kprintf("kernel_bootstrap: %s\n", message);
 207         kernel_debug_string_simple(message);
 208 }
 209
 210 static inline void
 211 kernel_bootstrap_thread_log(const char *message)
 212 {
 213 //      kprintf("kernel_bootstrap_thread: %s\n", message);
 214         kernel_debug_string_simple(message);
 215 }
 216
 217 void
 218 kernel_early_bootstrap(void)
 219 {
 220         /* serverperfmode is needed by timer setup */
 221         if (PE_parse_boot_argn("serverperfmode", &serverperfmode, sizeof (serverperfmode))) {
 222                 serverperfmode = 1;
 223         }
 224
 225         lck_mod_init();
 226
 227         /*
 228          * Initialize the timer callout world
 229          */
 230         timer_call_init();
 231
 232 #if CONFIG_SCHED_SFI
 233         /*
 234          * Configure SFI classes
 235          */
 236         sfi_early_init();
 237 #endif
 238 }
 239
 240 extern boolean_t IORamDiskBSDRoot(void);
 241 extern kern_return_t cpm_preallocate_early(void);
 242
 243 void
 244 kernel_bootstrap(void)
 245 {
 246         kern_return_t   result;
 247         thread_t        thread;
 248         char            namep[16];
 249
 250         printf("%s\n", version); /* log kernel version */
 251
 252         if (PE_parse_boot_argn("-l", namep, sizeof (namep))) /* leaks logging */
 253                 turn_on_log_leaks = 1;
 254
 255         PE_parse_boot_argn("trace", &new_nkdbufs, sizeof (new_nkdbufs));
 256         PE_parse_boot_argn("trace_wake", &wake_nkdbufs, sizeof (wake_nkdbufs));
 257         PE_parse_boot_argn("trace_panic", &write_trace_on_panic, sizeof(write_trace_on_panic));
 258         PE_parse_boot_argn("trace_typefilter", &trace_typefilter, sizeof(trace_typefilter));
 259
 260         scale_setup();
 261
 262         kernel_bootstrap_log("vm_mem_bootstrap");
 263         vm_mem_bootstrap();
 264
 265         kernel_bootstrap_log("cs_init");
 266         cs_init();
 267
 268         kernel_bootstrap_log("vm_mem_init");
 269         vm_mem_init();
 270
 271         machine_info.memory_size = (uint32_t)mem_size;
 272         machine_info.max_mem = max_mem;
 273         machine_info.major_version = version_major;
 274         machine_info.minor_version = version_minor;
 275
 276
 277 #if CONFIG_TELEMETRY
 278         kernel_bootstrap_log("telemetry_init");
 279         telemetry_init();
 280 #endif
 281
 282 #if CONFIG_CSR
 283         kernel_bootstrap_log("csr_init");
 284         csr_init();
 285 #endif
 286
 287         kernel_bootstrap_log("stackshot_lock_init");
 288         stackshot_lock_init();
 289
 290         kernel_bootstrap_log("sched_init");
 291         sched_init();
 292
 293         kernel_bootstrap_log("waitq_bootstrap");
 294         waitq_bootstrap();
 295
 296         kernel_bootstrap_log("ipc_bootstrap");
 297         ipc_bootstrap();
 298
 299 #if CONFIG_MACF
 300         kernel_bootstrap_log("mac_policy_init");
 301         mac_policy_init();
 302 #endif
 303
 304         kernel_bootstrap_log("ipc_init");
 305         ipc_init();
 306
 307         /*
 308          * As soon as the virtual memory system is up, we record
 309          * that this CPU is using the kernel pmap.
 310          */
 311         kernel_bootstrap_log("PMAP_ACTIVATE_KERNEL");
 312         PMAP_ACTIVATE_KERNEL(master_cpu);
 313
 314         kernel_bootstrap_log("mapping_free_prime");
 315         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 316
 317         kernel_bootstrap_log("machine_init");
 318         machine_init();
 319
 320         kernel_bootstrap_log("clock_init");
 321         clock_init();
 322
 323         ledger_init();
 324
 325         /*
 326          *      Initialize the IPC, task, and thread subsystems.
 327          */
 328 #if CONFIG_COALITIONS
 329         kernel_bootstrap_log("coalitions_init");
 330         coalitions_init();
 331 #endif
 332
 333         kernel_bootstrap_log("task_init");
 334         task_init();
 335
 336         kernel_bootstrap_log("thread_init");
 337         thread_init();
 338
 339 #if CONFIG_ATM
 340         /* Initialize the Activity Trace Resource Manager. */
 341         kernel_bootstrap_log("atm_init");
 342         atm_init();
 343 #endif
 344
 345 #if CONFIG_BANK
 346         /* Initialize the BANK Manager. */
 347         kernel_bootstrap_log("bank_init");
 348         bank_init();
 349 #endif
 350
 351         /* initialize the corpse config based on boot-args */
 352         corpses_init();
 353
 354         /*
 355          *      Create a kernel thread to execute the kernel bootstrap.
 356          */
 357         kernel_bootstrap_log("kernel_thread_create");
 358         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 359
 360         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 361
 362         thread->state = TH_RUN;
 363         thread->last_made_runnable_time = mach_absolute_time();
 364         thread_deallocate(thread);
 365
 366         kernel_bootstrap_log("load_context - done");
 367         load_context(thread);
 368         /*NOTREACHED*/
 369 }
 370
 371 int kth_started = 0;
 372
 373 vm_offset_t vm_kernel_addrperm;
 374 vm_offset_t buf_kernel_addrperm;
 375 vm_offset_t vm_kernel_addrperm_ext;
 376
 377 /*
 378  * Now running in a thread.  Kick off other services,
 379  * invoke user bootstrap, enter pageout loop.
 380  */
 381 static void
 382 kernel_bootstrap_thread(void)
 383 {
 384         processor_t             processor = current_processor();
 385
 386 #define kernel_bootstrap_thread_kprintf(x...) /* kprintf("kernel_bootstrap_thread: " x) */
 387         kernel_bootstrap_thread_log("idle_thread_create");
 388         /*
 389          * Create the idle processor thread.
 390          */
 391         idle_thread_create(processor);
 392
 393         /*
 394          * N.B. Do not stick anything else
 395          * before this point.
 396          *
 397          * Start up the scheduler services.
 398          */
 399         kernel_bootstrap_thread_log("sched_startup");
 400         sched_startup();
 401
 402         /*
 403          * Thread lifecycle maintenance (teardown, stack allocation)
 404          */
 405         kernel_bootstrap_thread_log("thread_daemon_init");
 406         thread_daemon_init();
 407
 408         /* Create kernel map entry reserve */
 409         vm_kernel_reserved_entry_init();
 410
 411         /*
 412          * Thread callout service.
 413          */
 414         kernel_bootstrap_thread_log("thread_call_initialize");
 415         thread_call_initialize();
 416
 417         /*
 418          * Remain on current processor as
 419          * additional processors come online.
 420          */
 421         kernel_bootstrap_thread_log("thread_bind");
 422         thread_bind(processor);
 423
 424         /*
 425          * Initialize ipc thread call support.
 426          */
 427         kernel_bootstrap_thread_log("ipc_thread_call_init");
 428         ipc_thread_call_init();
 429
 430         /*
 431          * Kick off memory mapping adjustments.
 432          */
 433         kernel_bootstrap_thread_log("mapping_adjust");
 434         mapping_adjust();
 435
 436         /*
 437          *      Create the clock service.
 438          */
 439         kernel_bootstrap_thread_log("clock_service_create");
 440         clock_service_create();
 441
 442         /*
 443          *      Create the device service.
 444          */
 445         device_service_create();
 446
 447         kth_started = 1;
 448
 449 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 450         /*
 451          * Create and initialize the physical copy window for processor 0
 452          * This is required before starting kicking off  IOKit.
 453          */
 454         cpu_physwindow_init(0);
 455 #endif
 456
 457
 458
 459 #if MACH_KDP
 460         kernel_bootstrap_log("kdp_init");
 461         kdp_init();
 462 #endif
 463
 464 #if ALTERNATE_DEBUGGER
 465         alternate_debugger_init();
 466 #endif
 467
 468 #if KPC
 469         kpc_init();
 470 #endif
 471
 472 #if CONFIG_ECC_LOGGING
 473         ecc_log_init();
 474 #endif
 475
 476 #if KPERF
 477         kperf_bootstrap();
 478 #endif
 479
 480 #if HYPERVISOR
 481         hv_support_init();
 482 #endif
 483
 484 #if CONFIG_TELEMETRY
 485         kernel_bootstrap_log("bootprofile_init");
 486         bootprofile_init();
 487 #endif
 488
 489 #if (defined(__i386__) || defined(__x86_64__)) && CONFIG_VMX
 490         vmx_init();
 491 #endif
 492
 493 #if (defined(__i386__) || defined(__x86_64__))
 494         if (kdebug_serial) {
 495                 new_nkdbufs = 1;
 496                 if (trace_typefilter == 0)
 497                         trace_typefilter = 1;
 498         }
 499         if (turn_on_log_leaks && !new_nkdbufs)
 500                 new_nkdbufs = 200000;
 501         if (trace_typefilter)
 502                 start_kern_tracing_with_typefilter(new_nkdbufs,
 503                                                    FALSE,
 504                                                    trace_typefilter);
 505         else
 506                 start_kern_tracing(new_nkdbufs, FALSE);
 507         if (turn_on_log_leaks)
 508                 log_leaks = 1;
 509
 510 #endif
 511
 512         kernel_bootstrap_log("prng_init");
 513         prng_cpu_init(master_cpu);
 514
 515 #ifdef  IOKIT
 516         PE_init_iokit();
 517 #endif
 518
 519         assert(ml_get_interrupts_enabled() == FALSE);
 520         (void) spllo();         /* Allow interruptions */
 521
 522 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 523         /*
 524          * Create and initialize the copy window for processor 0
 525          * This also allocates window space for all other processors.
 526          * However, this is dependent on the number of processors - so this call
 527          * must be after IOKit has been started because IOKit performs processor
 528          * discovery.
 529          */
 530         cpu_userwindow_init(0);
 531 #endif
 532
 533 #if (!defined(__i386__) && !defined(__x86_64__))
 534         if (turn_on_log_leaks && !new_nkdbufs)
 535                 new_nkdbufs = 200000;
 536         if (trace_typefilter)
 537                 start_kern_tracing_with_typefilter(new_nkdbufs, FALSE, trace_typefilter);
 538         else
 539                 start_kern_tracing(new_nkdbufs, FALSE);
 540         if (turn_on_log_leaks)
 541                 log_leaks = 1;
 542 #endif
 543
 544         /*
 545          *      Initialize the shared region module.
 546          */
 547         vm_shared_region_init();
 548         vm_commpage_init();
 549         vm_commpage_text_init();
 550
 551
 552 #if CONFIG_MACF
 553         kernel_bootstrap_log("mac_policy_initmach");
 554         mac_policy_initmach();
 555 #endif
 556
 557 #if CONFIG_SCHED_SFI
 558         kernel_bootstrap_log("sfi_init");
 559         sfi_init();
 560 #endif
 561
 562         /*
 563          * Initialize the globals used for permuting kernel
 564          * addresses that may be exported to userland as tokens
 565          * using VM_KERNEL_ADDRPERM()/VM_KERNEL_ADDRPERM_EXTERNAL().
 566          * Force the random number to be odd to avoid mapping a non-zero
 567          * word-aligned address to zero via addition.
 568          * Note: at this stage we can use the cryptographically secure PRNG
 569          * rather than early_random().
 570          */
 571         read_random(&vm_kernel_addrperm, sizeof(vm_kernel_addrperm));
 572         vm_kernel_addrperm |= 1;
 573         read_random(&buf_kernel_addrperm, sizeof(buf_kernel_addrperm));
 574         buf_kernel_addrperm |= 1;
 575         read_random(&vm_kernel_addrperm_ext, sizeof(vm_kernel_addrperm_ext));
 576         vm_kernel_addrperm_ext |= 1;
 577
 578         vm_set_restrictions();
 579
 580
 581
 582         /*
 583          *      Start the user bootstrap.
 584          */
 585 #ifdef  MACH_BSD
 586         bsd_init();
 587 #endif
 588
 589     /*
 590      * Get rid of segments used to bootstrap kext loading. This removes
 591      * the KLD, PRELINK symtab, LINKEDIT, and symtab segments/load commands.
 592      */
 593         OSKextRemoveKextBootstrap();
 594
 595         serial_keyboard_init();         /* Start serial keyboard if wanted */
 596
 597         vm_page_init_local_q();
 598
 599         thread_bind(PROCESSOR_NULL);
 600
 601         /*
 602          *      Become the pageout daemon.
 603          */
 604         vm_pageout();
 605         /*NOTREACHED*/
 606 }
 607
 608 /*
 609  *      slave_main:
 610  *
 611  *      Load the first thread to start a processor.
 612  */
 613 void
 614 slave_main(void *machine_param)
 615 {
 616         processor_t             processor = current_processor();
 617         thread_t                thread;
 618
 619         /*
 620          *      Use the idle processor thread if there
 621          *      is no dedicated start up thread.
 622          */
 623         if (processor->next_thread == THREAD_NULL) {
 624                 thread = processor->idle_thread;
 625                 thread->continuation = (thread_continue_t)processor_start_thread;
 626                 thread->parameter = machine_param;
 627         }
 628         else {
 629                 thread = processor->next_thread;
 630                 processor->next_thread = THREAD_NULL;
 631         }
 632
 633         load_context(thread);
 634         /*NOTREACHED*/
 635 }
 636
 637 /*
 638  *      processor_start_thread:
 639  *
 640  *      First thread to execute on a started processor.
 641  *
 642  *      Called at splsched.
 643  */
 644 void
 645 processor_start_thread(void *machine_param)
 646 {
 647         processor_t             processor = current_processor();
 648         thread_t                self = current_thread();
 649
 650         slave_machine_init(machine_param);
 651
 652         /*
 653          *      If running the idle processor thread,
 654          *      reenter the idle loop, else terminate.
 655          */
 656         if (self == processor->idle_thread)
 657                 thread_block((thread_continue_t)idle_thread);
 658
 659         thread_terminate(self);
 660         /*NOTREACHED*/
 661 }
 662
 663 /*
 664  *      load_context:
 665  *
 666  *      Start the first thread on a processor.
 667  */
 668 static void
 669 load_context(
 670         thread_t                thread)
 671 {
 672         processor_t             processor = current_processor();
 673
 674
 675 #define load_context_kprintf(x...) /* kprintf("load_context: " x) */
 676
 677         load_context_kprintf("machine_set_current_thread\n");
 678         machine_set_current_thread(thread);
 679
 680         load_context_kprintf("processor_up\n");
 681         processor_up(processor);
 682
 683         PMAP_ACTIVATE_KERNEL(processor->cpu_id);
 684
 685         /*
 686          * Acquire a stack if none attached.  The panic
 687          * should never occur since the thread is expected
 688          * to have reserved stack.
 689          */
 690         load_context_kprintf("thread %p, stack %lx, stackptr %lx\n", thread,
 691                              thread->kernel_stack, thread->machine.kstackptr);
 692         if (!thread->kernel_stack) {
 693                 load_context_kprintf("stack_alloc_try\n");
 694                 if (!stack_alloc_try(thread))
 695                         panic("load_context");
 696         }
 697
 698         /*
 699          * The idle processor threads are not counted as
 700          * running for load calculations.
 701          */
 702         if (!(thread->state & TH_IDLE))
 703                 sched_run_incr(thread);
 704
 705         processor->active_thread = thread;
 706         processor->current_pri = thread->sched_pri;
 707         processor->current_thmode = thread->sched_mode;
 708         processor->deadline = UINT64_MAX;
 709         thread->last_processor = processor;
 710
 711         processor->last_dispatch = mach_absolute_time();
 712         timer_start(&thread->system_timer, processor->last_dispatch);
 713         PROCESSOR_DATA(processor, thread_timer) = PROCESSOR_DATA(processor, kernel_timer) = &thread->system_timer;
 714
 715         timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
 716         PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 717
 718         PMAP_ACTIVATE_USER(thread, processor->cpu_id);
 719
 720         load_context_kprintf("machine_load_context\n");
 721         machine_load_context(thread);
 722         /*NOTREACHED*/
 723 }
 724
 725 void
 726 scale_setup()
 727 {
 728         int scale = 0;
 729 #if defined(__LP64__)
 730         typeof(task_max) task_max_base = task_max;
 731
 732         /* Raise limits for servers with >= 16G */
 733         if ((serverperfmode != 0) && ((uint64_t)sane_size >= (uint64_t)(16 * 1024 * 1024 *1024ULL))) {
 734                 scale = (int)((uint64_t)sane_size / (uint64_t)(8 * 1024 * 1024 *1024ULL));
 735                 /* limit to 128 G */
 736                 if (scale > 16)
 737                         scale = 16;
 738                 task_max_base = 2500;
 739         } else if ((uint64_t)sane_size >= (uint64_t)(3 * 1024 * 1024 *1024ULL))
 740                 scale = 2;
 741
 742         task_max = MAX(task_max, task_max_base * scale);
 743
 744         if (scale != 0) {
 745                 task_threadmax = task_max;
 746                 thread_max = task_max * 5;
 747         }
 748
 749 #endif
 750
 751         bsd_scale_setup(scale);
 752
 753         ipc_space_max = SPACE_MAX;
 754         ipc_port_max = PORT_MAX;
 755         ipc_pset_max = SET_MAX;
 756         semaphore_max = SEMAPHORE_MAX;
 757 }
 758