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> 15a4a2eb49SThomas Gleixner 167c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 17a4a2eb49SThomas Gleixner 183678e2fcSDavid Howells static struct signal_struct init_signals = { 193678e2fcSDavid Howells .nr_threads = 1, 203678e2fcSDavid Howells .thread_head = LIST_HEAD_INIT(init_task.thread_node), 213678e2fcSDavid Howells .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), 223678e2fcSDavid Howells .shared_pending = { 233678e2fcSDavid Howells .list = LIST_HEAD_INIT(init_signals.shared_pending.list), 243678e2fcSDavid Howells .signal = {{0}} 253678e2fcSDavid Howells }, 26c3ad2c3bSEric W. Biederman .multiprocess = HLIST_HEAD_INIT, 273678e2fcSDavid Howells .rlim = INIT_RLIMITS, 283678e2fcSDavid Howells .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), 29f7cfd871SEric W. Biederman .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), 303678e2fcSDavid Howells #ifdef CONFIG_POSIX_TIMERS 313678e2fcSDavid Howells .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), 323678e2fcSDavid Howells .cputimer = { 333678e2fcSDavid Howells .cputime_atomic = INIT_CPUTIME_ATOMIC, 343678e2fcSDavid Howells }, 353678e2fcSDavid Howells #endif 363678e2fcSDavid Howells INIT_CPU_TIMERS(init_signals) 372c470475SEric W. Biederman .pids = { 382c470475SEric W. Biederman [PIDTYPE_PID] = &init_struct_pid, 396883f81aSEric W. Biederman [PIDTYPE_TGID] = &init_struct_pid, 402c470475SEric W. Biederman [PIDTYPE_PGID] = &init_struct_pid, 412c470475SEric W. Biederman [PIDTYPE_SID] = &init_struct_pid, 422c470475SEric W. Biederman }, 433678e2fcSDavid Howells INIT_PREV_CPUTIME(init_signals) 443678e2fcSDavid Howells }; 453678e2fcSDavid Howells 463678e2fcSDavid Howells static struct sighand_struct init_sighand = { 4760d4de3fSElena Reshetova .count = REFCOUNT_INIT(1), 483678e2fcSDavid Howells .action = { { { .sa_handler = SIG_DFL, } }, }, 493678e2fcSDavid Howells .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), 503678e2fcSDavid Howells .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), 513678e2fcSDavid Howells }; 52a4a2eb49SThomas Gleixner 53d08b9f0cSSami Tolvanen #ifdef CONFIG_SHADOW_CALL_STACK 54d08b9f0cSSami Tolvanen unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] 55d08b9f0cSSami Tolvanen __init_task_data = { 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 */ 640500871fSDavid Howells struct task_struct init_task 650500871fSDavid Howells #ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK 660500871fSDavid Howells __init_task_data 670500871fSDavid Howells #endif 68d0b7213fSStafford Horne __aligned(L1_CACHE_BYTES) 69d11ed3abSDavid Howells = { 704e7e3adbSDavid Howells #ifdef CONFIG_THREAD_INFO_IN_TASK 714e7e3adbSDavid Howells .thread_info = INIT_THREAD_INFO(init_task), 72f0b89d39SElena Reshetova .stack_refcount = REFCOUNT_INIT(1), 734e7e3adbSDavid Howells #endif 74d11ed3abSDavid Howells .state = 0, 75d11ed3abSDavid Howells .stack = init_stack, 76ec1d2819SElena Reshetova .usage = REFCOUNT_INIT(2), 77d11ed3abSDavid Howells .flags = PF_KTHREAD, 78d11ed3abSDavid Howells .prio = MAX_PRIO - 20, 79d11ed3abSDavid Howells .static_prio = MAX_PRIO - 20, 80d11ed3abSDavid Howells .normal_prio = MAX_PRIO - 20, 81d11ed3abSDavid Howells .policy = SCHED_NORMAL, 823bd37062SSebastian Andrzej Siewior .cpus_ptr = &init_task.cpus_mask, 833bd37062SSebastian Andrzej Siewior .cpus_mask = CPU_MASK_ALL, 84d11ed3abSDavid Howells .nr_cpus_allowed= NR_CPUS, 85d11ed3abSDavid Howells .mm = NULL, 86d11ed3abSDavid Howells .active_mm = &init_mm, 87d11ed3abSDavid Howells .restart_block = { 88d11ed3abSDavid Howells .fn = do_no_restart_syscall, 89d11ed3abSDavid Howells }, 90d11ed3abSDavid Howells .se = { 91d11ed3abSDavid Howells .group_node = LIST_HEAD_INIT(init_task.se.group_node), 92d11ed3abSDavid Howells }, 93d11ed3abSDavid Howells .rt = { 94d11ed3abSDavid Howells .run_list = LIST_HEAD_INIT(init_task.rt.run_list), 95d11ed3abSDavid Howells .time_slice = RR_TIMESLICE, 96d11ed3abSDavid Howells }, 97d11ed3abSDavid Howells .tasks = LIST_HEAD_INIT(init_task.tasks), 984e7e3adbSDavid Howells #ifdef CONFIG_SMP 994e7e3adbSDavid Howells .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), 1004e7e3adbSDavid Howells #endif 1014e7e3adbSDavid Howells #ifdef CONFIG_CGROUP_SCHED 1024e7e3adbSDavid Howells .sched_task_group = &root_task_group, 1034e7e3adbSDavid Howells #endif 104d11ed3abSDavid Howells .ptraced = LIST_HEAD_INIT(init_task.ptraced), 105d11ed3abSDavid Howells .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), 106d11ed3abSDavid Howells .real_parent = &init_task, 107d11ed3abSDavid Howells .parent = &init_task, 108d11ed3abSDavid Howells .children = LIST_HEAD_INIT(init_task.children), 109d11ed3abSDavid Howells .sibling = LIST_HEAD_INIT(init_task.sibling), 110d11ed3abSDavid Howells .group_leader = &init_task, 111d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(real_cred, &init_cred), 112d11ed3abSDavid Howells RCU_POINTER_INITIALIZER(cred, &init_cred), 113d11ed3abSDavid Howells .comm = INIT_TASK_COMM, 114d11ed3abSDavid Howells .thread = INIT_THREAD, 115d11ed3abSDavid Howells .fs = &init_fs, 116d11ed3abSDavid Howells .files = &init_files, 1170f212204SJens Axboe #ifdef CONFIG_IO_URING 1180f212204SJens Axboe .io_uring = NULL, 1190f212204SJens Axboe #endif 120d11ed3abSDavid Howells .signal = &init_signals, 121d11ed3abSDavid Howells .sighand = &init_sighand, 122d11ed3abSDavid Howells .nsproxy = &init_nsproxy, 123d11ed3abSDavid Howells .pending = { 124d11ed3abSDavid Howells .list = LIST_HEAD_INIT(init_task.pending.list), 125d11ed3abSDavid Howells .signal = {{0}} 126d11ed3abSDavid Howells }, 127d11ed3abSDavid Howells .blocked = {{0}}, 128d11ed3abSDavid Howells .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), 129d11ed3abSDavid Howells .journal_info = NULL, 130d11ed3abSDavid Howells INIT_CPU_TIMERS(init_task) 131d11ed3abSDavid Howells .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), 132d11ed3abSDavid Howells .timer_slack_ns = 50000, /* 50 usec default slack */ 1332c470475SEric W. Biederman .thread_pid = &init_struct_pid, 134d11ed3abSDavid Howells .thread_group = LIST_HEAD_INIT(init_task.thread_group), 135d11ed3abSDavid Howells .thread_node = LIST_HEAD_INIT(init_signals.thread_head), 1364b7d248bSRichard Guy Briggs #ifdef CONFIG_AUDIT 1374e7e3adbSDavid Howells .loginuid = INVALID_UID, 138f0b75216SRichard Guy Briggs .sessionid = AUDIT_SID_UNSET, 1394e7e3adbSDavid Howells #endif 1404e7e3adbSDavid Howells #ifdef CONFIG_PERF_EVENTS 1414e7e3adbSDavid Howells .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), 1424e7e3adbSDavid Howells .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), 1434e7e3adbSDavid Howells #endif 1444e7e3adbSDavid Howells #ifdef CONFIG_PREEMPT_RCU 1454e7e3adbSDavid Howells .rcu_read_lock_nesting = 0, 1464e7e3adbSDavid Howells .rcu_read_unlock_special.s = 0, 1474e7e3adbSDavid Howells .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), 1484e7e3adbSDavid Howells .rcu_blocked_node = NULL, 1494e7e3adbSDavid Howells #endif 1504e7e3adbSDavid Howells #ifdef CONFIG_TASKS_RCU 1514e7e3adbSDavid Howells .rcu_tasks_holdout = false, 1524e7e3adbSDavid Howells .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), 1534e7e3adbSDavid Howells .rcu_tasks_idle_cpu = -1, 1544e7e3adbSDavid Howells #endif 155d5f177d3SPaul E. McKenney #ifdef CONFIG_TASKS_TRACE_RCU 156d5f177d3SPaul E. McKenney .trc_reader_nesting = 0, 157276c4104SPaul E. McKenney .trc_reader_special.s = 0, 158d5f177d3SPaul E. McKenney .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), 159d5f177d3SPaul E. McKenney #endif 1604e7e3adbSDavid Howells #ifdef CONFIG_CPUSETS 161b7505861SAhmed S. Darwish .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, 162b7505861SAhmed S. Darwish &init_task.alloc_lock), 1634e7e3adbSDavid Howells #endif 1644e7e3adbSDavid Howells #ifdef CONFIG_RT_MUTEXES 1654e7e3adbSDavid Howells .pi_waiters = RB_ROOT_CACHED, 1664e7e3adbSDavid Howells .pi_top_task = NULL, 1674e7e3adbSDavid Howells #endif 168d11ed3abSDavid Howells INIT_PREV_CPUTIME(init_task) 1694e7e3adbSDavid Howells #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 1704e7e3adbSDavid Howells .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), 1714e7e3adbSDavid Howells .vtime.starttime = 0, 1724e7e3adbSDavid Howells .vtime.state = VTIME_SYS, 1734e7e3adbSDavid Howells #endif 1744e7e3adbSDavid Howells #ifdef CONFIG_NUMA_BALANCING 17598fa15f3SAnshuman Khandual .numa_preferred_nid = NUMA_NO_NODE, 1764e7e3adbSDavid Howells .numa_group = NULL, 1774e7e3adbSDavid Howells .numa_faults = NULL, 1784e7e3adbSDavid Howells #endif 179d73b4936SAndrey Konovalov #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) 1804e7e3adbSDavid Howells .kasan_depth = 1, 1814e7e3adbSDavid Howells #endif 182dfd402a4SMarco Elver #ifdef CONFIG_KCSAN 183dfd402a4SMarco Elver .kcsan_ctx = { 184dfd402a4SMarco Elver .disable_count = 0, 185dfd402a4SMarco Elver .atomic_next = 0, 186dfd402a4SMarco Elver .atomic_nest_count = 0, 187dfd402a4SMarco Elver .in_flat_atomic = false, 18881af89e1SMarco Elver .access_mask = 0, 189757a4cefSMarco Elver .scoped_accesses = {LIST_POISON1, NULL}, 190dfd402a4SMarco Elver }, 191dfd402a4SMarco Elver #endif 1924e7e3adbSDavid Howells #ifdef CONFIG_TRACE_IRQFLAGS 1934e7e3adbSDavid Howells .softirqs_enabled = 1, 1944e7e3adbSDavid Howells #endif 1954e7e3adbSDavid Howells #ifdef CONFIG_LOCKDEP 196e196e479SYuyang Du .lockdep_depth = 0, /* no locks held yet */ 197f6ec8829SYuyang Du .curr_chain_key = INITIAL_CHAIN_KEY, 1984e7e3adbSDavid Howells .lockdep_recursion = 0, 1994e7e3adbSDavid Howells #endif 2004e7e3adbSDavid Howells #ifdef CONFIG_FUNCTION_GRAPH_TRACER 2014e7e3adbSDavid Howells .ret_stack = NULL, 202*7e0a9220SSteven Rostedt (VMware) .tracing_graph_pause = ATOMIC_INIT(0), 2034e7e3adbSDavid Howells #endif 204c1a280b6SThomas Gleixner #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) 2054e7e3adbSDavid Howells .trace_recursion = 0, 2064e7e3adbSDavid Howells #endif 2074e7e3adbSDavid Howells #ifdef CONFIG_LIVEPATCH 2084e7e3adbSDavid Howells .patch_state = KLP_UNDEFINED, 2094e7e3adbSDavid Howells #endif 2104e7e3adbSDavid Howells #ifdef CONFIG_SECURITY 2114e7e3adbSDavid Howells .security = NULL, 2124e7e3adbSDavid Howells #endif 213c818c03bSKees Cook #ifdef CONFIG_SECCOMP 214c818c03bSKees Cook .seccomp = { .filter_count = ATOMIC_INIT(0) }, 215c818c03bSKees Cook #endif 216d11ed3abSDavid Howells }; 217a4a2eb49SThomas Gleixner EXPORT_SYMBOL(init_task); 218a4a2eb49SThomas Gleixner 219a4a2eb49SThomas Gleixner /* 220a4a2eb49SThomas Gleixner * Initial thread structure. Alignment of this is handled by a special 221a4a2eb49SThomas Gleixner * linker map entry. 222a4a2eb49SThomas Gleixner */ 223c65eacbeSAndy Lutomirski #ifndef CONFIG_THREAD_INFO_IN_TASK 2240500871fSDavid Howells struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); 225c65eacbeSAndy Lutomirski #endif 226