This is xnu-10002.1.13. See this file in:
/*
* Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* NOTICE: This file was modified by McAfee Research in 2004 to introduce
* support for mandatory and extensible security protections. This notice
* is included in support of clause 2.2 (b) of the Apple Public License,
* Version 2.0.
*/
/*
*/
/*
* Mach kernel startup.
*/
#include <debug.h>
#include <mach_kdp.h>
#include <mach/boolean.h>
#include <mach/machine.h>
#include <mach/thread_act.h>
#include <mach/task_special_ports.h>
#include <mach/vm_param.h>
#include <kern/assert.h>
#include <kern/mach_param.h>
#include <kern/misc_protos.h>
#include <kern/clock.h>
#include <kern/coalition.h>
#include <kern/cpu_number.h>
#include <kern/ledger.h>
#include <kern/machine.h>
#include <kern/processor.h>
#include <kern/restartable.h>
#include <kern/sched_prim.h>
#include <kern/turnstile.h>
#if CONFIG_SCHED_SFI
#include <kern/sfi.h>
#endif
#include <kern/startup.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/timer.h>
#if CONFIG_TELEMETRY
#include <kern/telemetry.h>
#endif
#include <kern/zalloc.h>
#include <kern/locks.h>
#include <kern/debug.h>
#if KPERF
#include <kperf/kperf.h>
#endif /* KPERF */
#include <corpses/task_corpse.h>
#include <prng/random.h>
#include <console/serial_protos.h>
#include <vm/vm_kern.h>
#include <vm/vm_init.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_shared_region.h>
#include <machine/pmap.h>
#include <machine/commpage.h>
#include <machine/machine_routines.h>
#include <libkern/version.h>
#include <pexpert/device_tree.h>
#include <sys/codesign.h>
#include <sys/kdebug.h>
#include <sys/random.h>
#include <sys/ktrace.h>
#include <sys/trust_caches.h>
#include <sys/code_signing.h>
#include <libkern/section_keywords.h>
#include <kern/waitq.h>
#include <ipc/ipc_voucher.h>
#include <mach/host_info.h>
#include <pthread/workqueue_internal.h>
#if SOCKETS
extern void mbuf_tag_init(void);
#endif
#if CONFIG_XNUPOST
#include <tests/ktest.h>
#include <tests/xnupost.h>
#endif
#if CONFIG_ATM
#include <atm/atm_internal.h>
#endif
#if CONFIG_CSR
#include <sys/csr.h>
#endif
#if ALTERNATE_DEBUGGER
#include <arm64/alternate_debugger.h>
#endif
#if MACH_KDP
#include <kdp/kdp.h>
#endif
#if CONFIG_MACF
#include <security/mac_mach_internal.h>
#if CONFIG_VNGUARD
extern void vnguard_policy_init(void);
#endif
#endif
#if KPC
#include <kern/kpc.h>
#endif
#if HYPERVISOR
#include <kern/hv_support.h>
#endif
#if CONFIG_UBSAN_MINIMAL
#include <san/ubsan_minimal.h>
#endif
#include <san/kasan.h>
#include <i386/pmCPU.h>
static void kernel_bootstrap_thread(void);
static void load_context(
thread_t thread);
#if CONFIG_ECC_LOGGING
#include <kern/ecc.h>
#endif
#if (defined(__i386__) || defined(__x86_64__)) && CONFIG_VMX
#include <i386/vmx/vmx_cpu.h>
#endif
#if CONFIG_DTRACE
extern void dtrace_early_init(void);
extern void sdt_early_init(void);
#endif
// libkern/OSKextLib.cpp
extern void OSKextRemoveKextBootstrap(void);
void scale_setup(void);
extern void bsd_scale_setup(int);
extern unsigned int semaphore_max;
extern void stackshot_init(void);
/*
* Running in virtual memory, on the interrupt stack.
*/
extern struct startup_entry startup_entries[]
__SECTION_START_SYM(STARTUP_HOOK_SEGMENT, STARTUP_HOOK_SECTION);
extern struct startup_entry startup_entries_end[]
__SECTION_END_SYM(STARTUP_HOOK_SEGMENT, STARTUP_HOOK_SECTION);
static struct startup_entry *__startup_data startup_entry_cur = startup_entries;
SECURITY_READ_ONLY_LATE(startup_subsystem_id_t) startup_phase = STARTUP_SUB_NONE;
extern int serverperfmode;
TUNABLE(startup_debug_t, startup_debug, "startup_debug", 0);
static inline void
kernel_bootstrap_log(const char *message)
{
if ((startup_debug & STARTUP_DEBUG_VERBOSE) &&
startup_phase >= STARTUP_SUB_KPRINTF) {
kprintf("kernel_bootstrap: %s\n", message);
}
kernel_debug_string_early(message);
}
static inline void
kernel_bootstrap_thread_log(const char *message)
{
if ((startup_debug & STARTUP_DEBUG_VERBOSE) &&
startup_phase >= STARTUP_SUB_KPRINTF) {
kprintf("kernel_bootstrap_thread: %s\n", message);
}
kernel_debug_string_early(message);
}
extern void
qsort(void *a, size_t n, size_t es, int (*cmp)(const void *, const void *));
__startup_func
static int
startup_entry_cmp(const void *e1, const void *e2)
{
const struct startup_entry *a = e1;
const struct startup_entry *b = e2;
if (a->subsystem == b->subsystem) {
if (a->rank == b->rank) {
return 0;
}
return a->rank > b->rank ? 1 : -1;
}
return a->subsystem > b->subsystem ? 1 : -1;
}
__startup_func
void
kernel_startup_bootstrap(void)
{
/*
* Sort the various STARTUP() entries by subsystem/rank.
*/
size_t n = startup_entries_end - startup_entries;
if (n == 0) {
panic("Section %s,%s missing",
STARTUP_HOOK_SEGMENT, STARTUP_HOOK_SECTION);
}
if (((uintptr_t)startup_entries_end - (uintptr_t)startup_entries) %
sizeof(struct startup_entry)) {
panic("Section %s,%s has invalid size",
STARTUP_HOOK_SEGMENT, STARTUP_HOOK_SECTION);
}
qsort(startup_entries, n, sizeof(struct startup_entry), startup_entry_cmp);
/*
* Then initialize all tunables, timeouts, and locks
*/
kernel_startup_initialize_upto(STARTUP_SUB_LOCKS);
}
__startup_func
void
kernel_startup_tunable_init(const struct startup_tunable_spec *spec)
{
if (spec->var_is_str) {
PE_parse_boot_arg_str(spec->name, spec->var_addr, spec->var_len);
} else if (PE_parse_boot_argn(spec->name, spec->var_addr, spec->var_len)) {
if (spec->var_is_bool) {
/* make sure bool's are valued in {0, 1} */
*(bool *)spec->var_addr = *(uint8_t *)spec->var_addr;
}
}
}
__startup_func
void
kernel_startup_tunable_dt_init(const struct startup_tunable_dt_spec *spec)
{
DTEntry base;
if (SecureDTLookupEntry(NULL, spec->dt_base, &base) != kSuccess) {
base = NULL;
}
bool found_in_chosen = false;
if (spec->dt_chosen_override) {
DTEntry chosen, chosen_base;
if (SecureDTLookupEntry(NULL, "chosen", &chosen) != kSuccess) {
chosen = NULL;
}
if (chosen != NULL && SecureDTLookupEntry(chosen, spec->dt_base, &chosen_base) == kSuccess) {
base = chosen_base;
found_in_chosen = true;
}
}
uint64_t const *data;
unsigned int data_size = spec->var_len;
if (base != NULL && SecureDTGetProperty(base, spec->dt_name, (const void **)&data, &data_size) == kSuccess) {
if (data_size != spec->var_len) {
panic("unexpected tunable size %u in DT entry %s/%s/%s",
data_size, found_in_chosen ? "/chosen" : "", spec->dt_base, spec->dt_name);
}
/* No need to handle bools specially, they are 1 byte integers in the DT. */
memcpy(spec->var_addr, data, spec->var_len);
}
/* boot-arg overrides. */
if (PE_parse_boot_argn(spec->boot_arg_name, spec->var_addr, spec->var_len)) {
if (spec->var_is_bool) {
*(bool *)spec->var_addr = *(uint8_t *)spec->var_addr;
}
}
}
static void
kernel_startup_log(startup_subsystem_id_t subsystem)
{
static const char *names[] = {
[STARTUP_SUB_TUNABLES] = "tunables",
[STARTUP_SUB_TIMEOUTS] = "timeouts",
[STARTUP_SUB_LOCKS] = "locks",
[STARTUP_SUB_KPRINTF] = "kprintf",
[STARTUP_SUB_PMAP_STEAL] = "pmap_steal",
[STARTUP_SUB_KMEM] = "kmem",
[STARTUP_SUB_ZALLOC] = "zalloc",
[STARTUP_SUB_PERCPU] = "percpu",
[STARTUP_SUB_EVENT] = "event",
[STARTUP_SUB_CODESIGNING] = "codesigning",
[STARTUP_SUB_KTRACE] = "ktrace",
[STARTUP_SUB_OSLOG] = "oslog",
[STARTUP_SUB_MACH_IPC] = "mach_ipc",
[STARTUP_SUB_THREAD_CALL] = "thread_call",
[STARTUP_SUB_SYSCTL] = "sysctl",
[STARTUP_SUB_EARLY_BOOT] = "early_boot",
/* LOCKDOWN is special and its value won't fit here. */
};
static startup_subsystem_id_t logged = STARTUP_SUB_NONE;
if (subsystem <= logged) {
return;
}
if (subsystem < sizeof(names) / sizeof(names[0]) && names[subsystem]) {
kernel_bootstrap_log(names[subsystem]);
}
logged = subsystem;
}
__startup_func
void
event_register_handler(struct event_hdr *hdr)
{
struct event_hdr *head = hdr->next;
hdr->next = head->next;
head->next = hdr;
}
__startup_func
void
kernel_startup_initialize_upto(startup_subsystem_id_t upto)
{
struct startup_entry *cur = startup_entry_cur;
assert(startup_phase < upto);
while (cur < startup_entries_end && cur->subsystem <= upto) {
if ((startup_debug & STARTUP_DEBUG_VERBOSE) &&
startup_phase >= STARTUP_SUB_KPRINTF) {
kprintf("%s[%d, rank %d]: %p(%p)\n", __func__,
cur->subsystem, cur->rank, cur->func, cur->arg);
}
startup_phase = cur->subsystem - 1;
kernel_startup_log(cur->subsystem);
cur->func(cur->arg);
startup_entry_cur = ++cur;
}
kernel_startup_log(upto);
if ((startup_debug & STARTUP_DEBUG_VERBOSE) &&
upto >= STARTUP_SUB_KPRINTF) {
kprintf("%s: reached phase %d\n", __func__, upto);
}
startup_phase = upto;
}
void
kernel_bootstrap(void)
{
kern_return_t result;
thread_t thread;
char namep[16];
printf("%s\n", version); /* log kernel version */
scale_setup();
kernel_bootstrap_log("vm_mem_bootstrap");
vm_mem_bootstrap();
machine_info.memory_size = (uint32_t)mem_size;
#if XNU_TARGET_OS_OSX
machine_info.max_mem = max_mem_actual;
#else
machine_info.max_mem = max_mem;
#endif /* XNU_TARGET_OS_OSX */
machine_info.major_version = version_major;
machine_info.minor_version = version_minor;
#if CONFIG_ATM
/* Initialize the Activity Trace Resource Manager. */
kernel_bootstrap_log("atm_init");
atm_init();
#endif
kernel_startup_initialize_upto(STARTUP_SUB_OSLOG);
#if CONFIG_UBSAN_MINIMAL
kernel_bootstrap_log("UBSan minimal runtime init");
ubsan_minimal_init();
#endif
#if KASAN
kernel_bootstrap_log("kasan_late_init");
kasan_late_init();
#endif
#if CONFIG_TELEMETRY
kernel_bootstrap_log("telemetry_init");
telemetry_init();
#endif
if (PE_i_can_has_debugger(NULL)) {
if (PE_parse_boot_argn("-show_pointers", &namep, sizeof(namep))) {
doprnt_hide_pointers = FALSE;
}
if (PE_parse_boot_argn("-no_slto_panic", &namep, sizeof(namep))) {
extern boolean_t spinlock_timeout_panic;
spinlock_timeout_panic = FALSE;
}
}
kernel_bootstrap_log("console_init");
console_init();
kernel_bootstrap_log("stackshot_init");
stackshot_init();
kernel_bootstrap_log("sched_init");
sched_init();
#if CONFIG_MACF
kernel_bootstrap_log("mac_policy_init");
mac_policy_init();
#endif
kernel_startup_initialize_upto(STARTUP_SUB_MACH_IPC);
/*
* As soon as the virtual memory system is up, we record
* that this CPU is using the kernel pmap.
*/
kernel_bootstrap_log("PMAP_ACTIVATE_KERNEL");
PMAP_ACTIVATE_KERNEL(master_cpu);
kernel_bootstrap_log("mapping_free_prime");
mapping_free_prime(); /* Load up with temporary mapping blocks */
kernel_bootstrap_log("machine_init");
machine_init();
kernel_bootstrap_log("thread_machine_init_template");
thread_machine_init_template();
kernel_bootstrap_log("clock_init");
clock_init();
/*
* Initialize the IPC, task, and thread subsystems.
*/
#if CONFIG_THREAD_GROUPS
kernel_bootstrap_log("thread_group_init");
thread_group_init();
#endif
#if CONFIG_COALITIONS
kernel_bootstrap_log("coalitions_init");
coalitions_init();
#endif
kernel_bootstrap_log("code_signing_init");
code_signing_init();
code_signing_configuration(NULL, NULL);
kernel_bootstrap_log("task_init");
task_init();
kernel_bootstrap_log("thread_init");
thread_init();
kernel_bootstrap_log("restartable_init");
restartable_init();
kernel_bootstrap_log("workq_init");
workq_init();
kernel_bootstrap_log("turnstiles_init");
turnstiles_init();
kernel_bootstrap_log("mach_init_activity_id");
mach_init_activity_id();
/* initialize host_statistics */
host_statistics_init();
/* initialize exceptions */
kernel_bootstrap_log("exception_init");
exception_init();
#if CONFIG_SCHED_SFI
kernel_bootstrap_log("sfi_init");
sfi_init();
#endif
/*
* Create a kernel thread to execute the kernel bootstrap.
*/
kernel_bootstrap_log("kernel_thread_create");
result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
if (result != KERN_SUCCESS) {
panic("kernel_bootstrap: result = %08X", result);
}
/* TODO: do a proper thread_start() (without the thread_setrun()) */
thread->state = TH_RUN;
thread->last_made_runnable_time = mach_absolute_time();
thread_set_thread_name(thread, "kernel_bootstrap_thread");
thread_deallocate(thread);
kernel_bootstrap_log("load_context - done");
load_context(thread);
/*NOTREACHED*/
}
SECURITY_READ_ONLY_LATE(vm_offset_t) vm_kernel_addrperm;
SECURITY_READ_ONLY_LATE(vm_offset_t) buf_kernel_addrperm;
SECURITY_READ_ONLY_LATE(vm_offset_t) vm_kernel_addrperm_ext;
SECURITY_READ_ONLY_LATE(uint64_t) vm_kernel_addrhash_salt;
SECURITY_READ_ONLY_LATE(uint64_t) vm_kernel_addrhash_salt_ext;
/*
* Now running in a thread. Kick off other services,
* invoke user bootstrap, enter pageout loop.
*/
static void
kernel_bootstrap_thread(void)
{
processor_t processor = current_processor();
#if (DEVELOPMENT || DEBUG)
platform_stall_panic_or_spin(PLATFORM_STALL_XNU_LOCATION_KERNEL_BOOTSTRAP);
#endif
kernel_bootstrap_thread_log("idle_thread_create");
/*
* Create the idle processor thread.
*/
idle_thread_create(processor);
/*
* N.B. Do not stick anything else
* before this point.
*
* Start up the scheduler services.
*/
kernel_bootstrap_thread_log("sched_startup");
sched_startup();
/*
* Thread lifecycle maintenance (teardown, stack allocation)
*/
kernel_bootstrap_thread_log("thread_daemon_init");
thread_daemon_init();
/*
* Thread callout service.
*/
kernel_startup_initialize_upto(STARTUP_SUB_THREAD_CALL);
/*
* Remain on current processor as
* additional processors come online.
*/
kernel_bootstrap_thread_log("thread_bind");
thread_bind(processor);
/*
* Kick off memory mapping adjustments.
*/
kernel_bootstrap_thread_log("mapping_adjust");
mapping_adjust();
/*
* Create the clock service.
*/
kernel_bootstrap_thread_log("clock_service_create");
clock_service_create();
/*
* Create the device service.
*/
device_service_create();
phys_carveout_init();
#if MACH_KDP
kernel_bootstrap_log("kdp_init");
kdp_init();
#endif
#if ALTERNATE_DEBUGGER
alternate_debugger_init();
#endif
#if HYPERVISOR
kernel_bootstrap_thread_log("hv_support_init");
hv_support_init();
#endif
#if CONFIG_TELEMETRY
kernel_bootstrap_log("bootprofile_init");
bootprofile_init();
#endif
kernel_startup_initialize_upto(STARTUP_SUB_SYSCTL);
/*
* Initialize the globals used for permuting kernel
* addresses that may be exported to userland as tokens
* using VM_KERNEL_ADDRPERM()/VM_KERNEL_ADDRPERM_EXTERNAL().
* Force the random number to be odd to avoid mapping a non-zero
* word-aligned address to zero via addition.
*/
vm_kernel_addrperm = (vm_offset_t)(early_random() | 1);
buf_kernel_addrperm = (vm_offset_t)(early_random() | 1);
vm_kernel_addrperm_ext = (vm_offset_t)(early_random() | 1);
vm_kernel_addrhash_salt = early_random();
vm_kernel_addrhash_salt_ext = early_random();
#ifdef IOKIT
kernel_bootstrap_log("PE_init_iokit");
PE_init_iokit();
#endif
assert(ml_get_interrupts_enabled() == FALSE);
/*
* Past this point, kernel subsystems that expect to operate with
* interrupts or preemption enabled may begin enforcement.
*/
kernel_startup_initialize_upto(STARTUP_SUB_EARLY_BOOT);
#if SCHED_HYGIENE_DEBUG
// Reset interrupts masked timeout before we enable interrupts
ml_spin_debug_clear_self();
#endif
(void) spllo(); /* Allow interruptions */
/*
* This will start displaying progress to the user, start as early as possible
*/
initialize_screen(NULL, kPEAcquireScreen);
/*
* Initialize the shared region module.
*/
vm_commpage_init();
vm_commpage_text_init();
#if CONFIG_MACF
kernel_bootstrap_log("mac_policy_initmach");
mac_policy_initmach();
#if CONFIG_VNGUARD
kernel_bootstrap_log("vnguard_policy_init");
vnguard_policy_init();
#endif
#endif
#if CONFIG_DTRACE
kernel_bootstrap_log("dtrace_early_init");
dtrace_early_init();
sdt_early_init();
#endif
#if CODE_SIGNING_MONITOR
kernel_bootstrap_log("provisioning_profile_init");
csm_initialize_provisioning_profiles();
#endif
#ifndef BCM2837
kernel_bootstrap_log("trust_cache_init");
/* Initialize the runtime for the trust cache interface */
trust_cache_runtime_init();
/* Load the static and engineering trust caches */
load_static_trust_cache();
#endif
kernel_startup_initialize_upto(STARTUP_SUB_LOCKDOWN);
/*
* Get rid of segments used to bootstrap kext loading. This removes
* the KLD, PRELINK symtab, LINKEDIT, and symtab segments/load commands.
* Must be done prior to lockdown so that we can free (and possibly relocate)
* the static KVA mappings used for the jettisoned bootstrap segments.
*/
kernel_bootstrap_log("OSKextRemoveKextBootstrap");
OSKextRemoveKextBootstrap();
#if SOCKETS
/*
* Initialize callback table before machine lockdown
*/
mbuf_tag_init();
#endif
/* No changes to kernel text and rodata beyond this point. */
kernel_bootstrap_log("machine_lockdown");
machine_lockdown();
#ifdef CONFIG_XNUPOST
kern_return_t result = kernel_list_tests();
result = kernel_do_post();
if (result != KERN_SUCCESS) {
panic("kernel_do_post: Tests failed with result = 0x%08x", result);
}
kernel_bootstrap_log("kernel_do_post - done");
#endif /* CONFIG_XNUPOST */
#ifdef IOKIT
kernel_bootstrap_log("PE_lockdown_iokit");
PE_lockdown_iokit();
#endif
/*
* max_cpus must be nailed down by the time PE_lockdown_iokit() finishes,
* at the latest
*/
vm_set_restrictions(machine_info.max_cpus);
#if KPERF
kperf_init_early();
#endif
/*
* Start the user bootstrap.
*/
#ifdef MACH_BSD
bsd_init();
#endif
/*
* Get rid of pages used for early boot tracing.
*/
kdebug_free_early_buf();
serial_keyboard_init(); /* Start serial keyboard if wanted */
vm_page_init_local_q(machine_info.max_cpus);
thread_bind(PROCESSOR_NULL);
/*
* Now that all CPUs are available to run threads, this is essentially
* a background thread. Take this opportunity to initialize and free
* any remaining vm_pages that were delayed earlier by pmap_startup().
*/
vm_free_delayed_pages();
/*
* Become the pageout daemon.
*/
vm_pageout();
/*NOTREACHED*/
}
/*
* slave_main:
*
* Load the first thread to start a processor.
* This path will also be used by the master processor
* after being offlined.
*/
void
slave_main(void *machine_param)
{
processor_t processor = current_processor();
thread_t thread;
/*
* Use the idle processor thread if there
* is no dedicated start up thread.
*/
if (processor->processor_offlined == true) {
/* Return to the saved processor_offline context */
assert(processor->startup_thread == THREAD_NULL);
thread = processor->idle_thread;
thread->parameter = machine_param;
} else if (processor->startup_thread) {
thread = processor->startup_thread;
processor->startup_thread = THREAD_NULL;
} else {
thread = processor->idle_thread;
thread->continuation = processor_start_thread;
thread->parameter = machine_param;
}
load_context(thread);
/*NOTREACHED*/
}
/*
* processor_start_thread:
*
* First thread to execute on a started processor.
*
* Called at splsched.
*/
void
processor_start_thread(void *machine_param,
__unused wait_result_t result)
{
processor_t processor = current_processor();
thread_t self = current_thread();
slave_machine_init(machine_param);
/*
* If running the idle processor thread,
* reenter the idle loop, else terminate.
*/
if (self == processor->idle_thread) {
thread_block(idle_thread);
}
thread_terminate(self);
/*NOTREACHED*/
}
/*
* load_context:
*
* Start the first thread on a processor.
* This may be the first thread ever run on a processor, or
* it could be a processor that was previously offlined.
*/
static void __attribute__((noreturn))
load_context(
thread_t thread)
{
processor_t processor = current_processor();
#define load_context_kprintf(x...) /* kprintf("load_context: " x) */
load_context_kprintf("machine_set_current_thread\n");
machine_set_current_thread(thread);
load_context_kprintf("processor_up\n");
PMAP_ACTIVATE_KERNEL(processor->cpu_id);
/*
* Acquire a stack if none attached. The panic
* should never occur since the thread is expected
* to have reserved stack.
*/
load_context_kprintf("thread %p, stack %lx, stackptr %lx\n", thread,
thread->kernel_stack, thread->machine.kstackptr);
if (!thread->kernel_stack) {
load_context_kprintf("stack_alloc_try\n");
if (!stack_alloc_try(thread)) {
panic("load_context");
}
}
/*
* The idle processor threads are not counted as
* running for load calculations.
*/
if (!(thread->state & TH_IDLE)) {
SCHED(run_count_incr)(thread);
}
processor->active_thread = thread;
processor_state_update_explicit(processor, thread->sched_pri,
SFI_CLASS_KERNEL, PSET_SMP, thread_get_perfcontrol_class(thread), THREAD_URGENCY_NONE,
((thread->state & TH_IDLE) || (thread->bound_processor != PROCESSOR_NULL)) ? TH_BUCKET_SCHED_MAX : thread->th_sched_bucket);
processor->current_is_bound = thread->bound_processor != PROCESSOR_NULL;
processor->current_is_NO_SMT = false;
processor->current_is_eagerpreempt = false;
#if CONFIG_THREAD_GROUPS
processor->current_thread_group = thread_group_get(thread);
#endif
processor->starting_pri = thread->sched_pri;
processor->deadline = UINT64_MAX;
thread->last_processor = processor;
processor_up(processor);
struct recount_snap snap = { 0 };
recount_snapshot(&snap);
processor->last_dispatch = snap.rsn_time_mach;
recount_processor_run(&processor->pr_recount, &snap);
recount_update_snap(&snap);
smr_cpu_join(processor, processor->last_dispatch);
PMAP_ACTIVATE_USER(thread, processor->cpu_id);
load_context_kprintf("machine_load_context\n");
#if KASAN_TBI
__asan_handle_no_return();
#endif /* KASAN_TBI */
machine_load_context(thread);
/*NOTREACHED*/
}
void
scale_setup(void)
{
int scale = 0;
#if defined(__LP64__)
typeof(task_max) task_max_base = task_max;
/* Raise limits for servers with >= 16G */
if ((serverperfmode != 0) && ((uint64_t)max_mem_actual >= (uint64_t)(16 * 1024 * 1024 * 1024ULL))) {
scale = (int)((uint64_t)sane_size / (uint64_t)(8 * 1024 * 1024 * 1024ULL));
/* limit to 128 G */
if (scale > 16) {
scale = 16;
}
task_max_base = 2500;
/* Raise limits for machines with >= 3GB */
} else if ((uint64_t)max_mem_actual >= (uint64_t)(3 * 1024 * 1024 * 1024ULL)) {
if ((uint64_t)max_mem_actual < (uint64_t)(8 * 1024 * 1024 * 1024ULL)) {
scale = 2;
} else {
/* limit to 64GB */
scale = MIN(16, (int)((uint64_t)max_mem_actual / (uint64_t)(4 * 1024 * 1024 * 1024ULL)));
}
}
task_max = MAX(task_max, task_max_base * scale);
if (scale != 0) {
task_threadmax = task_max;
thread_max = task_max * 5;
}
#endif
bsd_scale_setup(scale);
}