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> 12f0b75216SRichard Guy Briggs #include <linux/audit.h> 1398fa15f3SAnshuman Khandual #include <linux/numa.h> 14d08b9f0cSSami Tolvanen #include <linux/scs.h> 158b7787a5SKent Overstreet #include <linux/plist.h> 16a4a2eb49SThomas Gleixner 177c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 18a4a2eb49SThomas Gleixner 193678e2fcSDavid Howells static struct signal_struct init_signals = { 203678e2fcSDavid Howells .nr_threads = 1, 213678e2fcSDavid Howells .thread_head = LIST_HEAD_INIT(init_task.thread_node), 223678e2fcSDavid Howells .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), 233678e2fcSDavid Howells .shared_pending = { 243678e2fcSDavid Howells .list = LIST_HEAD_INIT(init_signals.shared_pending.list), 253678e2fcSDavid Howells .signal = {{0}} 263678e2fcSDavid Howells }, 27c3ad2c3bSEric W. Biederman .multiprocess = HLIST_HEAD_INIT, 283678e2fcSDavid Howells .rlim = INIT_RLIMITS, 293678e2fcSDavid Howells .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), 30f7cfd871SEric W. Biederman .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), 313678e2fcSDavid Howells #ifdef CONFIG_POSIX_TIMERS 323678e2fcSDavid Howells .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), 333678e2fcSDavid Howells .cputimer = { 343678e2fcSDavid Howells .cputime_atomic = INIT_CPUTIME_ATOMIC, 353678e2fcSDavid Howells }, 363678e2fcSDavid Howells #endif 373678e2fcSDavid Howells INIT_CPU_TIMERS(init_signals) 382c470475SEric W. Biederman .pids = { 392c470475SEric W. Biederman [PIDTYPE_PID] = &init_struct_pid, 406883f81aSEric W. Biederman [PIDTYPE_TGID] = &init_struct_pid, 412c470475SEric W. Biederman [PIDTYPE_PGID] = &init_struct_pid, 422c470475SEric W. Biederman [PIDTYPE_SID] = &init_struct_pid, 432c470475SEric W. Biederman }, 443678e2fcSDavid Howells INIT_PREV_CPUTIME(init_signals) 453678e2fcSDavid Howells }; 463678e2fcSDavid Howells 473678e2fcSDavid Howells static struct sighand_struct init_sighand = { 4860d4de3fSElena Reshetova .count = REFCOUNT_INIT(1), 493678e2fcSDavid Howells .action = { { { .sa_handler = SIG_DFL, } }, }, 503678e2fcSDavid Howells .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), 513678e2fcSDavid Howells .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), 523678e2fcSDavid Howells }; 53a4a2eb49SThomas Gleixner 54d08b9f0cSSami Tolvanen #ifdef CONFIG_SHADOW_CALL_STACK 550eb5085cSHeiko Carstens unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = { 56d08b9f0cSSami Tolvanen [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC 57d08b9f0cSSami Tolvanen }; 58d08b9f0cSSami Tolvanen #endif 59d08b9f0cSSami Tolvanen 60d11ed3abSDavid Howells /* 61d11ed3abSDavid Howells * Set up the first task table, touch at your own risk!. Base=0, 62d11ed3abSDavid Howells * limit=0x1fffff (=2MB) 63d11ed3abSDavid Howells */ 640eb5085cSHeiko Carstens struct task_struct init_task __aligned(L1_CACHE_BYTES) = { 654e7e3adbSDavid Howells #ifdef CONFIG_THREAD_INFO_IN_TASK 664e7e3adbSDavid Howells .thread_info = INIT_THREAD_INFO(init_task), 67f0b89d39SElena Reshetova .stack_refcount = REFCOUNT_INIT(1), 684e7e3adbSDavid Howells #endif 692f064a59SPeter Zijlstra .__state = 0, 70d11ed3abSDavid Howells .stack = init_stack, 71ec1d2819SElena Reshetova .usage = REFCOUNT_INIT(2), 72d11ed3abSDavid Howells .flags = PF_KTHREAD, 73d11ed3abSDavid Howells .prio = MAX_PRIO - 20, 74d11ed3abSDavid Howells .static_prio = MAX_PRIO - 20, 75d11ed3abSDavid Howells .normal_prio = MAX_PRIO - 20, 76d11ed3abSDavid Howells .policy = SCHED_NORMAL, 773bd37062SSebastian Andrzej Siewior .cpus_ptr = &init_task.cpus_mask, 78b90ca8baSWill Deacon .user_cpus_ptr = NULL, 793bd37062SSebastian Andrzej Siewior .cpus_mask = CPU_MASK_ALL, 80d11ed3abSDavid Howells .nr_cpus_allowed= NR_CPUS, 81d11ed3abSDavid Howells .mm = NULL, 82d11ed3abSDavid Howells .active_mm = &init_mm, 832b69987bSKent Overstreet .faults_disabled_mapping = NULL, 84d11ed3abSDavid Howells .restart_block = { 85d11ed3abSDavid Howells .fn = do_no_restart_syscall, 86d11ed3abSDavid Howells }, 87d11ed3abSDavid Howells .se = { 88d11ed3abSDavid Howells .group_node = LIST_HEAD_INIT(init_task.se.group_node), 89d11ed3abSDavid Howells }, 90d11ed3abSDavid Howells .rt = { 91d11ed3abSDavid Howells .run_list = LIST_HEAD_INIT(init_task.rt.run_list), 92d11ed3abSDavid Howells .time_slice = RR_TIMESLICE, 93d11ed3abSDavid Howells }, 94d11ed3abSDavid Howells .tasks = LIST_HEAD_INIT(init_task.tasks), 954e7e3adbSDavid Howells #ifdef CONFIG_SMP 964e7e3adbSDavid Howells .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), 974e7e3adbSDavid Howells #endif 984e7e3adbSDavid Howells #ifdef CONFIG_CGROUP_SCHED 994e7e3adbSDavid Howells .sched_task_group = &root_task_group, 1004e7e3adbSDavid Howells #endif 101d11ed3abSDavid Howells .ptraced = LIST_HEAD_INIT(init_task.ptraced), 102d11ed3abSDavid Howells .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), 103d11ed3abSDavid Howells .real_parent = &init_task, 104d11ed3abSDavid Howells .parent = &init_task, 105d11ed3abSDavid Howells .children = LIST_HEAD_INIT(init_task.children), 106d11ed3abSDavid Howells .sibling = LIST_HEAD_INIT(init_task.sibling), 107d11ed3abSDavid Howells .group_leader = &init_task, 108d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(real_cred, &init_cred), 109d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(cred, &init_cred), 110d11ed3abSDavid Howells .comm = INIT_TASK_COMM, 111d11ed3abSDavid Howells .thread = INIT_THREAD, 112d11ed3abSDavid Howells .fs = &init_fs, 113d11ed3abSDavid Howells .files = &init_files, 1140f212204SJens Axboe #ifdef CONFIG_IO_URING 1150f212204SJens Axboe .io_uring = NULL, 1160f212204SJens Axboe #endif 117d11ed3abSDavid Howells .signal = &init_signals, 118d11ed3abSDavid Howells .sighand = &init_sighand, 119d11ed3abSDavid Howells .nsproxy = &init_nsproxy, 120d11ed3abSDavid Howells .pending = { 121d11ed3abSDavid Howells .list = LIST_HEAD_INIT(init_task.pending.list), 122d11ed3abSDavid Howells .signal = {{0}} 123d11ed3abSDavid Howells }, 124d11ed3abSDavid Howells .blocked = {{0}}, 125d11ed3abSDavid Howells .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), 126d11ed3abSDavid Howells .journal_info = NULL, 127d11ed3abSDavid Howells INIT_CPU_TIMERS(init_task) 128d11ed3abSDavid Howells .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), 129d11ed3abSDavid Howells .timer_slack_ns = 50000, /* 50 usec default slack */ 1302c470475SEric W. Biederman .thread_pid = &init_struct_pid, 131d11ed3abSDavid Howells .thread_node = LIST_HEAD_INIT(init_signals.thread_head), 1324b7d248bSRichard Guy Briggs #ifdef CONFIG_AUDIT 1334e7e3adbSDavid Howells .loginuid = INVALID_UID, 134f0b75216SRichard Guy Briggs .sessionid = AUDIT_SID_UNSET, 1354e7e3adbSDavid Howells #endif 1364e7e3adbSDavid Howells #ifdef CONFIG_PERF_EVENTS 1374e7e3adbSDavid Howells .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), 1384e7e3adbSDavid Howells .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), 1394e7e3adbSDavid Howells #endif 1404e7e3adbSDavid Howells #ifdef CONFIG_PREEMPT_RCU 1414e7e3adbSDavid Howells .rcu_read_lock_nesting = 0, 1424e7e3adbSDavid Howells .rcu_read_unlock_special.s = 0, 1434e7e3adbSDavid Howells .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), 1444e7e3adbSDavid Howells .rcu_blocked_node = NULL, 1454e7e3adbSDavid Howells #endif 1464e7e3adbSDavid Howells #ifdef CONFIG_TASKS_RCU 1474e7e3adbSDavid Howells .rcu_tasks_holdout = false, 1484e7e3adbSDavid Howells .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), 1494e7e3adbSDavid Howells .rcu_tasks_idle_cpu = -1, 150*46faf9d8SPaul E. McKenney .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list), 1514e7e3adbSDavid Howells #endif 152d5f177d3SPaul E. McKenney #ifdef CONFIG_TASKS_TRACE_RCU 153d5f177d3SPaul E. McKenney .trc_reader_nesting = 0, 154276c4104SPaul E. McKenney .trc_reader_special.s = 0, 155d5f177d3SPaul E. McKenney .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), 156434c9eefSPaul E. McKenney .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), 157d5f177d3SPaul E. McKenney #endif 1584e7e3adbSDavid Howells #ifdef CONFIG_CPUSETS 159b7505861SAhmed S. Darwish .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, 160b7505861SAhmed S. Darwish &init_task.alloc_lock), 1614e7e3adbSDavid Howells #endif 1624e7e3adbSDavid Howells #ifdef CONFIG_RT_MUTEXES 1634e7e3adbSDavid Howells .pi_waiters = RB_ROOT_CACHED, 1644e7e3adbSDavid Howells .pi_top_task = NULL, 1654e7e3adbSDavid Howells #endif 166d11ed3abSDavid Howells INIT_PREV_CPUTIME(init_task) 1674e7e3adbSDavid Howells #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 1684e7e3adbSDavid Howells .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), 1694e7e3adbSDavid Howells .vtime.starttime = 0, 1704e7e3adbSDavid Howells .vtime.state = VTIME_SYS, 1714e7e3adbSDavid Howells #endif 1724e7e3adbSDavid Howells #ifdef CONFIG_NUMA_BALANCING 17398fa15f3SAnshuman Khandual .numa_preferred_nid = NUMA_NO_NODE, 1744e7e3adbSDavid Howells .numa_group = NULL, 1754e7e3adbSDavid Howells .numa_faults = NULL, 1764e7e3adbSDavid Howells #endif 177d73b4936SAndrey Konovalov #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) 1784e7e3adbSDavid Howells .kasan_depth = 1, 1794e7e3adbSDavid Howells #endif 180dfd402a4SMarco Elver #ifdef CONFIG_KCSAN 181dfd402a4SMarco Elver .kcsan_ctx = { 182757a4cefSMarco Elver .scoped_accesses = {LIST_POISON1, NULL}, 183dfd402a4SMarco Elver }, 184dfd402a4SMarco Elver #endif 1854e7e3adbSDavid Howells #ifdef CONFIG_TRACE_IRQFLAGS 1864e7e3adbSDavid Howells .softirqs_enabled = 1, 1874e7e3adbSDavid Howells #endif 1884e7e3adbSDavid Howells #ifdef CONFIG_LOCKDEP 189e196e479SYuyang Du .lockdep_depth = 0, /* no locks held yet */ 190f6ec8829SYuyang Du .curr_chain_key = INITIAL_CHAIN_KEY, 1914e7e3adbSDavid Howells .lockdep_recursion = 0, 1924e7e3adbSDavid Howells #endif 1934e7e3adbSDavid Howells #ifdef CONFIG_FUNCTION_GRAPH_TRACER 1944e7e3adbSDavid Howells .ret_stack = NULL, 1957e0a9220SSteven Rostedt (VMware) .tracing_graph_pause = ATOMIC_INIT(0), 1964e7e3adbSDavid Howells #endif 197c1a280b6SThomas Gleixner #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) 1984e7e3adbSDavid Howells .trace_recursion = 0, 1994e7e3adbSDavid Howells #endif 2004e7e3adbSDavid Howells #ifdef CONFIG_LIVEPATCH 2014e7e3adbSDavid Howells .patch_state = KLP_UNDEFINED, 2024e7e3adbSDavid Howells #endif 2034e7e3adbSDavid Howells #ifdef CONFIG_SECURITY 2044e7e3adbSDavid Howells .security = NULL, 2054e7e3adbSDavid Howells #endif 20664bdc024SKenta.Tada@sony.com #ifdef CONFIG_SECCOMP_FILTER 207c818c03bSKees Cook .seccomp = { .filter_count = ATOMIC_INIT(0) }, 208c818c03bSKees Cook #endif 209d11ed3abSDavid Howells }; 210a4a2eb49SThomas Gleixner EXPORT_SYMBOL(init_task); 211a4a2eb49SThomas Gleixner 212a4a2eb49SThomas Gleixner /* 213a4a2eb49SThomas Gleixner * Initial thread structure. Alignment of this is handled by a special 214a4a2eb49SThomas Gleixner * linker map entry. 215a4a2eb49SThomas Gleixner */ 216c65eacbeSAndy Lutomirski #ifndef CONFIG_THREAD_INFO_IN_TASK 2170500871fSDavid Howells struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); 218c65eacbeSAndy Lutomirski #endif 219