1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2a4a2eb49SThomas Gleixner #include <linux/init_task.h> 3a4a2eb49SThomas Gleixner #include <linux/export.h> 4a4a2eb49SThomas Gleixner #include <linux/mqueue.h> 5a4a2eb49SThomas Gleixner #include <linux/sched.h> 6cf4aebc2SClark Williams #include <linux/sched/sysctl.h> 78bd75c77SClark Williams #include <linux/sched/rt.h> 89164bb4aSIngo Molnar #include <linux/sched/task.h> 9a4a2eb49SThomas Gleixner #include <linux/init.h> 10a4a2eb49SThomas Gleixner #include <linux/fs.h> 11a4a2eb49SThomas Gleixner #include <linux/mm.h> 12*f0b75216SRichard Guy Briggs #include <linux/audit.h> 13a4a2eb49SThomas Gleixner 14a4a2eb49SThomas Gleixner #include <asm/pgtable.h> 157c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 16a4a2eb49SThomas Gleixner 173678e2fcSDavid Howells static struct signal_struct init_signals = { 183678e2fcSDavid Howells .nr_threads = 1, 193678e2fcSDavid Howells .thread_head = LIST_HEAD_INIT(init_task.thread_node), 203678e2fcSDavid Howells .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), 213678e2fcSDavid Howells .shared_pending = { 223678e2fcSDavid Howells .list = LIST_HEAD_INIT(init_signals.shared_pending.list), 233678e2fcSDavid Howells .signal = {{0}} 243678e2fcSDavid Howells }, 253678e2fcSDavid Howells .rlim = INIT_RLIMITS, 263678e2fcSDavid Howells .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), 273678e2fcSDavid Howells #ifdef CONFIG_POSIX_TIMERS 283678e2fcSDavid Howells .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), 293678e2fcSDavid Howells .cputimer = { 303678e2fcSDavid Howells .cputime_atomic = INIT_CPUTIME_ATOMIC, 313678e2fcSDavid Howells .running = false, 323678e2fcSDavid Howells .checking_timer = false, 333678e2fcSDavid Howells }, 343678e2fcSDavid Howells #endif 353678e2fcSDavid Howells INIT_CPU_TIMERS(init_signals) 363678e2fcSDavid Howells INIT_PREV_CPUTIME(init_signals) 373678e2fcSDavid Howells }; 383678e2fcSDavid Howells 393678e2fcSDavid Howells static struct sighand_struct init_sighand = { 403678e2fcSDavid Howells .count = ATOMIC_INIT(1), 413678e2fcSDavid Howells .action = { { { .sa_handler = SIG_DFL, } }, }, 423678e2fcSDavid Howells .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), 433678e2fcSDavid Howells .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), 443678e2fcSDavid Howells }; 45a4a2eb49SThomas Gleixner 46d11ed3abSDavid Howells /* 47d11ed3abSDavid Howells * Set up the first task table, touch at your own risk!. Base=0, 48d11ed3abSDavid Howells * limit=0x1fffff (=2MB) 49d11ed3abSDavid Howells */ 500500871fSDavid Howells struct task_struct init_task 510500871fSDavid Howells #ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK 520500871fSDavid Howells __init_task_data 530500871fSDavid Howells #endif 54d11ed3abSDavid Howells = { 554e7e3adbSDavid Howells #ifdef CONFIG_THREAD_INFO_IN_TASK 564e7e3adbSDavid Howells .thread_info = INIT_THREAD_INFO(init_task), 574e7e3adbSDavid Howells .stack_refcount = ATOMIC_INIT(1), 584e7e3adbSDavid Howells #endif 59d11ed3abSDavid Howells .state = 0, 60d11ed3abSDavid Howells .stack = init_stack, 61d11ed3abSDavid Howells .usage = ATOMIC_INIT(2), 62d11ed3abSDavid Howells .flags = PF_KTHREAD, 63d11ed3abSDavid Howells .prio = MAX_PRIO - 20, 64d11ed3abSDavid Howells .static_prio = MAX_PRIO - 20, 65d11ed3abSDavid Howells .normal_prio = MAX_PRIO - 20, 66d11ed3abSDavid Howells .policy = SCHED_NORMAL, 67d11ed3abSDavid Howells .cpus_allowed = CPU_MASK_ALL, 68d11ed3abSDavid Howells .nr_cpus_allowed= NR_CPUS, 69d11ed3abSDavid Howells .mm = NULL, 70d11ed3abSDavid Howells .active_mm = &init_mm, 71d11ed3abSDavid Howells .restart_block = { 72d11ed3abSDavid Howells .fn = do_no_restart_syscall, 73d11ed3abSDavid Howells }, 74d11ed3abSDavid Howells .se = { 75d11ed3abSDavid Howells .group_node = LIST_HEAD_INIT(init_task.se.group_node), 76d11ed3abSDavid Howells }, 77d11ed3abSDavid Howells .rt = { 78d11ed3abSDavid Howells .run_list = LIST_HEAD_INIT(init_task.rt.run_list), 79d11ed3abSDavid Howells .time_slice = RR_TIMESLICE, 80d11ed3abSDavid Howells }, 81d11ed3abSDavid Howells .tasks = LIST_HEAD_INIT(init_task.tasks), 824e7e3adbSDavid Howells #ifdef CONFIG_SMP 834e7e3adbSDavid Howells .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), 844e7e3adbSDavid Howells #endif 854e7e3adbSDavid Howells #ifdef CONFIG_CGROUP_SCHED 864e7e3adbSDavid Howells .sched_task_group = &root_task_group, 874e7e3adbSDavid Howells #endif 88d11ed3abSDavid Howells .ptraced = LIST_HEAD_INIT(init_task.ptraced), 89d11ed3abSDavid Howells .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), 90d11ed3abSDavid Howells .real_parent = &init_task, 91d11ed3abSDavid Howells .parent = &init_task, 92d11ed3abSDavid Howells .children = LIST_HEAD_INIT(init_task.children), 93d11ed3abSDavid Howells .sibling = LIST_HEAD_INIT(init_task.sibling), 94d11ed3abSDavid Howells .group_leader = &init_task, 95d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(real_cred, &init_cred), 96d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(cred, &init_cred), 97d11ed3abSDavid Howells .comm = INIT_TASK_COMM, 98d11ed3abSDavid Howells .thread = INIT_THREAD, 99d11ed3abSDavid Howells .fs = &init_fs, 100d11ed3abSDavid Howells .files = &init_files, 101d11ed3abSDavid Howells .signal = &init_signals, 102d11ed3abSDavid Howells .sighand = &init_sighand, 103d11ed3abSDavid Howells .nsproxy = &init_nsproxy, 104d11ed3abSDavid Howells .pending = { 105d11ed3abSDavid Howells .list = LIST_HEAD_INIT(init_task.pending.list), 106d11ed3abSDavid Howells .signal = {{0}} 107d11ed3abSDavid Howells }, 108d11ed3abSDavid Howells .blocked = {{0}}, 109d11ed3abSDavid Howells .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), 110d11ed3abSDavid Howells .journal_info = NULL, 111d11ed3abSDavid Howells INIT_CPU_TIMERS(init_task) 112d11ed3abSDavid Howells .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), 113d11ed3abSDavid Howells .timer_slack_ns = 50000, /* 50 usec default slack */ 114d11ed3abSDavid Howells .pids = { 115d11ed3abSDavid Howells [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), 116d11ed3abSDavid Howells [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), 117d11ed3abSDavid Howells [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), 118d11ed3abSDavid Howells }, 119d11ed3abSDavid Howells .thread_group = LIST_HEAD_INIT(init_task.thread_group), 120d11ed3abSDavid Howells .thread_node = LIST_HEAD_INIT(init_signals.thread_head), 1214e7e3adbSDavid Howells #ifdef CONFIG_AUDITSYSCALL 1224e7e3adbSDavid Howells .loginuid = INVALID_UID, 123*f0b75216SRichard Guy Briggs .sessionid = AUDIT_SID_UNSET, 1244e7e3adbSDavid Howells #endif 1254e7e3adbSDavid Howells #ifdef CONFIG_PERF_EVENTS 1264e7e3adbSDavid Howells .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), 1274e7e3adbSDavid Howells .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), 1284e7e3adbSDavid Howells #endif 1294e7e3adbSDavid Howells #ifdef CONFIG_PREEMPT_RCU 1304e7e3adbSDavid Howells .rcu_read_lock_nesting = 0, 1314e7e3adbSDavid Howells .rcu_read_unlock_special.s = 0, 1324e7e3adbSDavid Howells .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), 1334e7e3adbSDavid Howells .rcu_blocked_node = NULL, 1344e7e3adbSDavid Howells #endif 1354e7e3adbSDavid Howells #ifdef CONFIG_TASKS_RCU 1364e7e3adbSDavid Howells .rcu_tasks_holdout = false, 1374e7e3adbSDavid Howells .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), 1384e7e3adbSDavid Howells .rcu_tasks_idle_cpu = -1, 1394e7e3adbSDavid Howells #endif 1404e7e3adbSDavid Howells #ifdef CONFIG_CPUSETS 1414e7e3adbSDavid Howells .mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq), 1424e7e3adbSDavid Howells #endif 1434e7e3adbSDavid Howells #ifdef CONFIG_RT_MUTEXES 1444e7e3adbSDavid Howells .pi_waiters = RB_ROOT_CACHED, 1454e7e3adbSDavid Howells .pi_top_task = NULL, 1464e7e3adbSDavid Howells #endif 147d11ed3abSDavid Howells INIT_PREV_CPUTIME(init_task) 1484e7e3adbSDavid Howells #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 1494e7e3adbSDavid Howells .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), 1504e7e3adbSDavid Howells .vtime.starttime = 0, 1514e7e3adbSDavid Howells .vtime.state = VTIME_SYS, 1524e7e3adbSDavid Howells #endif 1534e7e3adbSDavid Howells #ifdef CONFIG_NUMA_BALANCING 1544e7e3adbSDavid Howells .numa_preferred_nid = -1, 1554e7e3adbSDavid Howells .numa_group = NULL, 1564e7e3adbSDavid Howells .numa_faults = NULL, 1574e7e3adbSDavid Howells #endif 1584e7e3adbSDavid Howells #ifdef CONFIG_KASAN 1594e7e3adbSDavid Howells .kasan_depth = 1, 1604e7e3adbSDavid Howells #endif 1614e7e3adbSDavid Howells #ifdef CONFIG_TRACE_IRQFLAGS 1624e7e3adbSDavid Howells .softirqs_enabled = 1, 1634e7e3adbSDavid Howells #endif 1644e7e3adbSDavid Howells #ifdef CONFIG_LOCKDEP 1654e7e3adbSDavid Howells .lockdep_recursion = 0, 1664e7e3adbSDavid Howells #endif 1674e7e3adbSDavid Howells #ifdef CONFIG_FUNCTION_GRAPH_TRACER 1684e7e3adbSDavid Howells .ret_stack = NULL, 1694e7e3adbSDavid Howells #endif 1704e7e3adbSDavid Howells #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPT) 1714e7e3adbSDavid Howells .trace_recursion = 0, 1724e7e3adbSDavid Howells #endif 1734e7e3adbSDavid Howells #ifdef CONFIG_LIVEPATCH 1744e7e3adbSDavid Howells .patch_state = KLP_UNDEFINED, 1754e7e3adbSDavid Howells #endif 1764e7e3adbSDavid Howells #ifdef CONFIG_SECURITY 1774e7e3adbSDavid Howells .security = NULL, 1784e7e3adbSDavid Howells #endif 179d11ed3abSDavid Howells }; 180a4a2eb49SThomas Gleixner EXPORT_SYMBOL(init_task); 181a4a2eb49SThomas Gleixner 182a4a2eb49SThomas Gleixner /* 183a4a2eb49SThomas Gleixner * Initial thread structure. Alignment of this is handled by a special 184a4a2eb49SThomas Gleixner * linker map entry. 185a4a2eb49SThomas Gleixner */ 186c65eacbeSAndy Lutomirski #ifndef CONFIG_THREAD_INFO_IN_TASK 1870500871fSDavid Howells struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); 188c65eacbeSAndy Lutomirski #endif 189