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init/main.c
26.8 KB
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/* * linux/init/main.c * * Copyright (C) 1991, 1992 Linus Torvalds * * GK 2/5/95 - Changed to support mounting root fs via NFS * Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96 * Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96 |
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* Simplified starting of init: Michael A. Griffith <grif@acm.org> |
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*/ |
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#define DEBUG /* Enable initcall_debug */ |
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#include <linux/types.h> |
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#include <linux/extable.h> |
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#include <linux/module.h> #include <linux/proc_fs.h> |
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#include <linux/binfmts.h> |
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#include <linux/kernel.h> #include <linux/syscalls.h> |
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#include <linux/stackprotector.h> |
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#include <linux/string.h> #include <linux/ctype.h> #include <linux/delay.h> |
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#include <linux/ioport.h> #include <linux/init.h> |
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#include <linux/initrd.h> |
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#include <linux/bootmem.h> |
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#include <linux/acpi.h> |
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#include <linux/console.h> |
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#include <linux/nmi.h> |
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#include <linux/percpu.h> #include <linux/kmod.h> |
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#include <linux/vmalloc.h> |
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#include <linux/kernel_stat.h> |
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#include <linux/start_kernel.h> |
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#include <linux/security.h> |
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#include <linux/smp.h> |
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#include <linux/profile.h> #include <linux/rcupdate.h> #include <linux/moduleparam.h> #include <linux/kallsyms.h> #include <linux/writeback.h> #include <linux/cpu.h> #include <linux/cpuset.h> |
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#include <linux/cgroup.h> |
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#include <linux/efi.h> |
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#include <linux/tick.h> |
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#include <linux/interrupt.h> |
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#include <linux/taskstats_kern.h> |
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#include <linux/delayacct.h> |
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#include <linux/unistd.h> #include <linux/rmap.h> #include <linux/mempolicy.h> #include <linux/key.h> |
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#include <linux/buffer_head.h> |
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#include <linux/page_ext.h> |
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#include <linux/debug_locks.h> |
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#include <linux/debugobjects.h> |
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#include <linux/lockdep.h> |
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#include <linux/kmemleak.h> |
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#include <linux/pid_namespace.h> |
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#include <linux/device.h> |
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#include <linux/kthread.h> |
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#include <linux/sched.h> |
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#include <linux/sched/init.h> |
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#include <linux/signal.h> |
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#include <linux/idr.h> |
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#include <linux/kgdb.h> |
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#include <linux/ftrace.h> |
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#include <linux/async.h> |
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#include <linux/sfi.h> |
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#include <linux/shmem_fs.h> |
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#include <linux/slab.h> |
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#include <linux/perf_event.h> |
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#include <linux/ptrace.h> |
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#include <linux/pti.h> |
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#include <linux/blkdev.h> #include <linux/elevator.h> |
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#include <linux/sched_clock.h> |
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#include <linux/sched/task.h> |
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#include <linux/sched/task_stack.h> |
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#include <linux/context_tracking.h> |
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#include <linux/random.h> |
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#include <linux/list.h> |
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#include <linux/integrity.h> |
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#include <linux/proc_ns.h> |
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#include <linux/io.h> |
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#include <linux/cache.h> |
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#include <linux/rodata_test.h> |
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#include <asm/io.h> #include <asm/bugs.h> #include <asm/setup.h> |
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#include <asm/sections.h> |
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#include <asm/cacheflush.h> |
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static int kernel_init(void *); |
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extern void init_IRQ(void); |
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extern void fork_init(void); |
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extern void radix_tree_init(void); |
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|
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/* * Debug helper: via this flag we know that we are in 'early bootup code' * where only the boot processor is running with IRQ disabled. This means * two things - IRQ must not be enabled before the flag is cleared and some * operations which are not allowed with IRQ disabled are allowed while the * flag is set. */ bool early_boot_irqs_disabled __read_mostly; |
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enum system_states system_state __read_mostly; |
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EXPORT_SYMBOL(system_state); /* * Boot command-line arguments */ #define MAX_INIT_ARGS CONFIG_INIT_ENV_ARG_LIMIT #define MAX_INIT_ENVS CONFIG_INIT_ENV_ARG_LIMIT extern void time_init(void); /* Default late time init is NULL. archs can override this later. */ |
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void (*__initdata late_time_init)(void); |
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/* Untouched command line saved by arch-specific code. */ char __initdata boot_command_line[COMMAND_LINE_SIZE]; /* Untouched saved command line (eg. for /proc) */ char *saved_command_line; /* Command line for parameter parsing */ static char *static_command_line; |
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/* Command line for per-initcall parameter parsing */ static char *initcall_command_line; |
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static char *execute_command; |
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static char *ramdisk_execute_command; |
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|
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/* |
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* Used to generate warnings if static_key manipulation functions are used * before jump_label_init is called. */ |
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bool static_key_initialized __read_mostly; |
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EXPORT_SYMBOL_GPL(static_key_initialized); /* |
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* If set, this is an indication to the drivers that reset the underlying * device before going ahead with the initialization otherwise driver might * rely on the BIOS and skip the reset operation. * * This is useful if kernel is booting in an unreliable environment. |
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* For ex. kdump situation where previous kernel has crashed, BIOS has been |
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* skipped and devices will be in unknown state. */ unsigned int reset_devices; EXPORT_SYMBOL(reset_devices); |
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static int __init set_reset_devices(char *str) { reset_devices = 1; return 1; } __setup("reset_devices", set_reset_devices); |
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static const char *argv_init[MAX_INIT_ARGS+2] = { "init", NULL, }; const char *envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, }; |
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static const char *panic_later, *panic_param; |
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extern const struct obs_kernel_param __setup_start[], __setup_end[]; |
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static bool __init obsolete_checksetup(char *line) |
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{ |
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const struct obs_kernel_param *p; |
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bool had_early_param = false; |
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p = __setup_start; do { int n = strlen(p->str); |
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if (parameqn(line, p->str, n)) { |
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if (p->early) { |
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/* Already done in parse_early_param? * (Needs exact match on param part). * Keep iterating, as we can have early * params and __setups of same names 8( */ |
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if (line[n] == '\0' || line[n] == '=') |
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had_early_param = true; |
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} else if (!p->setup_func) { |
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pr_warn("Parameter %s is obsolete, ignored ", p->str); |
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return true; |
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} else if (p->setup_func(line + n)) |
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return true; |
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} p++; } while (p < __setup_end); |
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return had_early_param; |
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} /* * This should be approx 2 Bo*oMips to start (note initial shift), and will * still work even if initially too large, it will just take slightly longer */ unsigned long loops_per_jiffy = (1<<12); |
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EXPORT_SYMBOL(loops_per_jiffy); static int __init debug_kernel(char *str) { |
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console_loglevel = CONSOLE_LOGLEVEL_DEBUG; |
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return 0; |
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} static int __init quiet_kernel(char *str) { |
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console_loglevel = CONSOLE_LOGLEVEL_QUIET; |
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return 0; |
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} |
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early_param("debug", debug_kernel); early_param("quiet", quiet_kernel); |
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static int __init loglevel(char *str) { |
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int newlevel; /* * Only update loglevel value when a correct setting was passed, * to prevent blind crashes (when loglevel being set to 0) that * are quite hard to debug */ if (get_option(&str, &newlevel)) { console_loglevel = newlevel; return 0; } return -EINVAL; |
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} |
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early_param("loglevel", loglevel); |
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|
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/* Change NUL term back to "=", to make "param" the whole string. */ |
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static int __init repair_env_string(char *param, char *val, const char *unused, void *arg) |
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{ |
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if (val) { /* param=val or param="val"? */ if (val == param+strlen(param)+1) val[-1] = '='; else if (val == param+strlen(param)+2) { val[-2] = '='; memmove(val-1, val, strlen(val)+1); val--; } else BUG(); } |
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return 0; } |
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/* Anything after -- gets handed straight to init. */ |
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static int __init set_init_arg(char *param, char *val, const char *unused, void *arg) |
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{ unsigned int i; if (panic_later) return 0; |
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repair_env_string(param, val, unused, NULL); |
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for (i = 0; argv_init[i]; i++) { if (i == MAX_INIT_ARGS) { panic_later = "init"; panic_param = param; return 0; } } argv_init[i] = param; return 0; } |
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/* * Unknown boot options get handed to init, unless they look like * unused parameters (modprobe will find them in /proc/cmdline). */ |
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static int __init unknown_bootoption(char *param, char *val, const char *unused, void *arg) |
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{ |
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repair_env_string(param, val, unused, NULL); |
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/* Handle obsolete-style parameters */ if (obsolete_checksetup(param)) return 0; |
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/* Unused module parameter. */ if (strchr(param, '.') && (!val || strchr(param, '.') < val)) |
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return 0; |
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if (panic_later) return 0; if (val) { /* Environment option */ unsigned int i; for (i = 0; envp_init[i]; i++) { if (i == MAX_INIT_ENVS) { |
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panic_later = "env"; |
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panic_param = param; } if (!strncmp(param, envp_init[i], val - param)) break; } envp_init[i] = param; } else { /* Command line option */ unsigned int i; for (i = 0; argv_init[i]; i++) { if (i == MAX_INIT_ARGS) { |
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panic_later = "init"; |
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panic_param = param; } } argv_init[i] = param; } return 0; } static int __init init_setup(char *str) { unsigned int i; execute_command = str; /* * In case LILO is going to boot us with default command line, * it prepends "auto" before the whole cmdline which makes * the shell think it should execute a script with such name. * So we ignore all arguments entered _before_ init=... [MJ] */ for (i = 1; i < MAX_INIT_ARGS; i++) argv_init[i] = NULL; return 1; } __setup("init=", init_setup); |
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static int __init rdinit_setup(char *str) { unsigned int i; ramdisk_execute_command = str; /* See "auto" comment in init_setup */ for (i = 1; i < MAX_INIT_ARGS; i++) argv_init[i] = NULL; return 1; } __setup("rdinit=", rdinit_setup); |
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#ifndef CONFIG_SMP |
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static const unsigned int setup_max_cpus = NR_CPUS; |
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static inline void setup_nr_cpu_ids(void) { } |
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static inline void smp_prepare_cpus(unsigned int maxcpus) { } |
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#endif /* |
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* We need to store the untouched command line for future reference. * We also need to store the touched command line since the parameter * parsing is performed in place, and we should allow a component to * store reference of name/value for future reference. */ static void __init setup_command_line(char *command_line) { |
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saved_command_line = memblock_virt_alloc(strlen(boot_command_line) + 1, 0); initcall_command_line = memblock_virt_alloc(strlen(boot_command_line) + 1, 0); static_command_line = memblock_virt_alloc(strlen(command_line) + 1, 0); |
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strcpy(saved_command_line, boot_command_line); strcpy(static_command_line, command_line); |
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} /* |
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* We need to finalize in a non-__init function or else race conditions * between the root thread and the init thread may cause start_kernel to * be reaped by free_initmem before the root thread has proceeded to * cpu_idle. * * gcc-3.4 accidentally inlines this function, so use noinline. */ |
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static __initdata DECLARE_COMPLETION(kthreadd_done); |
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static noinline void __ref rest_init(void) |
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{ |
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struct task_struct *tsk; |
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int pid; |
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rcu_scheduler_starting(); |
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/* |
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* We need to spawn init first so that it obtains pid 1, however |
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* the init task will end up wanting to create kthreads, which, if * we schedule it before we create kthreadd, will OOPS. */ |
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pid = kernel_thread(kernel_init, NULL, CLONE_FS); /* * Pin init on the boot CPU. Task migration is not properly working * until sched_init_smp() has been run. It will set the allowed * CPUs for init to the non isolated CPUs. */ rcu_read_lock(); tsk = find_task_by_pid_ns(pid, &init_pid_ns); set_cpus_allowed_ptr(tsk, cpumask_of(smp_processor_id())); rcu_read_unlock(); |
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numa_default_policy(); |
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pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES); |
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rcu_read_lock(); |
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kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns); |
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rcu_read_unlock(); |
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/* * Enable might_sleep() and smp_processor_id() checks. * They cannot be enabled earlier because with CONFIG_PRREMPT=y * kernel_thread() would trigger might_sleep() splats. With * CONFIG_PREEMPT_VOLUNTARY=y the init task might have scheduled * already, but it's stuck on the kthreadd_done completion. */ system_state = SYSTEM_SCHEDULING; |
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complete(&kthreadd_done); |
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/* * The boot idle thread must execute schedule() |
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* at least once to get things moving: |
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*/ |
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schedule_preempt_disabled(); |
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/* Call into cpu_idle with preempt disabled */ |
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cpu_startup_entry(CPUHP_ONLINE); |
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} |
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/* Check for early params. */ |
ecc861705 module: add extra... |
422 423 |
static int __init do_early_param(char *param, char *val, const char *unused, void *arg) |
1da177e4c Linux-2.6.12-rc2 |
424 |
{ |
914dcaa84 param: make param... |
425 |
const struct obs_kernel_param *p; |
1da177e4c Linux-2.6.12-rc2 |
426 427 |
for (p = __setup_start; p < __setup_end; p++) { |
b1e4d20cb params: make dash... |
428 |
if ((p->early && parameq(param, p->str)) || |
18a8bd949 serial: convert e... |
429 430 431 |
(strcmp(param, "console") == 0 && strcmp(p->str, "earlycon") == 0) ) { |
1da177e4c Linux-2.6.12-rc2 |
432 |
if (p->setup_func(val) != 0) |
ea676e846 init/main.c: conv... |
433 434 |
pr_warn("Malformed early option '%s' ", param); |
1da177e4c Linux-2.6.12-rc2 |
435 436 437 438 439 |
} } /* We accept everything at this stage. */ return 0; } |
13977091a Driver Core: earl... |
440 441 |
void __init parse_early_options(char *cmdline) { |
ecc861705 module: add extra... |
442 443 |
parse_args("early options", cmdline, NULL, 0, 0, 0, NULL, do_early_param); |
13977091a Driver Core: earl... |
444 |
} |
1da177e4c Linux-2.6.12-rc2 |
445 446 447 |
/* Arch code calls this early on, or if not, just before other parsing. */ void __init parse_early_param(void) { |
dd4d9fecb init/main.c: code... |
448 449 |
static int done __initdata; static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; |
1da177e4c Linux-2.6.12-rc2 |
450 451 452 453 454 |
if (done) return; /* All fall through to do_early_param. */ |
30d7e0d46 [PATCH] Dynamic k... |
455 |
strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); |
13977091a Driver Core: earl... |
456 |
parse_early_options(tmp_cmdline); |
1da177e4c Linux-2.6.12-rc2 |
457 458 |
done = 1; } |
e7ff3a476 x86/amd: Check fo... |
459 |
void __init __weak arch_post_acpi_subsys_init(void) { } |
839ad62e7 [POWERPC] Use __w... |
460 |
void __init __weak smp_setup_processor_id(void) |
033ab7f8e [PATCH] add smp_s... |
461 462 |
{ } |
eded09ccf FRV: gcc-4.1.2 al... |
463 |
# if THREAD_SIZE >= PAGE_SIZE |
b235beea9 Clarify naming of... |
464 |
void __init __weak thread_stack_cache_init(void) |
8c9843e57 [POWERPC] Add thr... |
465 466 |
{ } |
eded09ccf FRV: gcc-4.1.2 al... |
467 |
#endif |
8c9843e57 [POWERPC] Add thr... |
468 |
|
c7753208a x86, swiotlb: Add... |
469 |
void __init __weak mem_encrypt_init(void) { } |
444f478f6 init: introduce m... |
470 471 472 473 474 |
/* * Set up kernel memory allocators */ static void __init mm_init(void) { |
eefa864b7 mm/page_ext: resu... |
475 476 477 478 479 |
/* * page_ext requires contiguous pages, * bigger than MAX_ORDER unless SPARSEMEM. */ page_ext_init_flatmem(); |
444f478f6 init: introduce m... |
480 481 |
mem_init(); kmem_cache_init(); |
b35f1819a mm: create a sepa... |
482 |
pgtable_init(); |
444f478f6 init: introduce m... |
483 |
vmalloc_init(); |
0ddab1d2e lib/ioremap.c: ad... |
484 |
ioremap_huge_init(); |
763f7eaf6 init: Invoke init... |
485 486 |
/* Should be run before the first non-init thread is created */ init_espfix_bsp(); |
a4b07fb4e x86/mm/pti: Add i... |
487 488 |
/* Should be run after espfix64 is set up. */ pti_init(); |
444f478f6 init: introduce m... |
489 |
} |
722a9f929 asmlinkage: Add e... |
490 |
asmlinkage __visible void __init start_kernel(void) |
1da177e4c Linux-2.6.12-rc2 |
491 |
{ |
dd4d9fecb init/main.c: code... |
492 493 |
char *command_line; char *after_dashes; |
033ab7f8e [PATCH] add smp_s... |
494 |
|
d4311ff1a init/main.c: Give... |
495 |
set_task_stack_end_magic(&init_task); |
73839c5b2 init/main.c: Exec... |
496 |
smp_setup_processor_id(); |
3ac7fe5a4 infrastructure to... |
497 |
debug_objects_early_init(); |
420594296 x86: fix the stac... |
498 |
|
ddbcc7e8e Task Control Grou... |
499 |
cgroup_init_early(); |
fbb9ce953 [PATCH] lockdep: ... |
500 501 |
local_irq_disable(); |
2ce802f62 lockdep: Move ear... |
502 |
early_boot_irqs_disabled = true; |
fbb9ce953 [PATCH] lockdep: ... |
503 |
|
1b3b3b49b init/main: proper... |
504 505 506 507 |
/* * Interrupts are still disabled. Do necessary setups, then * enable them. */ |
44fd22992 [PATCH] Register ... |
508 |
boot_cpu_init(); |
1da177e4c Linux-2.6.12-rc2 |
509 |
page_address_init(); |
ea676e846 init/main.c: conv... |
510 |
pr_notice("%s", linux_banner); |
1da177e4c Linux-2.6.12-rc2 |
511 |
setup_arch(&command_line); |
121388a31 init: move stack ... |
512 513 |
/* * Set up the the initial canary and entropy after arch |
33d72f382 init/main.c: extr... |
514 |
* and after adding latent and command line entropy. |
121388a31 init: move stack ... |
515 516 |
*/ add_latent_entropy(); |
33d72f382 init/main.c: extr... |
517 |
add_device_randomness(command_line, strlen(command_line)); |
121388a31 init: move stack ... |
518 |
boot_init_stack_canary(); |
6345d24da mm: Fix boot cras... |
519 |
mm_init_cpumask(&init_mm); |
30d7e0d46 [PATCH] Dynamic k... |
520 |
setup_command_line(command_line); |
e0982e90c init: move setup ... |
521 |
setup_nr_cpu_ids(); |
d6647bdf9 init: set nr_cpu_... |
522 |
setup_per_cpu_areas(); |
44fd22992 [PATCH] Register ... |
523 |
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ |
b7722f4ac init: rename and ... |
524 |
boot_cpu_hotplug_init(); |
1da177e4c Linux-2.6.12-rc2 |
525 |
|
72675e131 mm, memory_hotplu... |
526 |
build_all_zonelists(NULL); |
83b519e8b slab: setup alloc... |
527 |
page_alloc_init(); |
ea676e846 init/main.c: conv... |
528 529 |
pr_notice("Kernel command line: %s ", boot_command_line); |
83b519e8b slab: setup alloc... |
530 |
parse_early_param(); |
51e158c12 param: hand argum... |
531 532 533 |
after_dashes = parse_args("Booting kernel", static_command_line, __start___param, __stop___param - __start___param, |
ecc861705 module: add extra... |
534 |
-1, -1, NULL, &unknown_bootoption); |
3438cf549 param: fix crash ... |
535 |
if (!IS_ERR_OR_NULL(after_dashes)) |
51e158c12 param: hand argum... |
536 |
parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, |
ecc861705 module: add extra... |
537 |
NULL, set_init_arg); |
97ce2c88f jump-label: initi... |
538 539 |
jump_label_init(); |
83b519e8b slab: setup alloc... |
540 541 542 543 |
/* * These use large bootmem allocations and must precede * kmem_cache_init() */ |
162a7e750 printk: allocate ... |
544 |
setup_log_buf(0); |
83b519e8b slab: setup alloc... |
545 |
pidhash_init(); |
83b519e8b slab: setup alloc... |
546 547 548 |
vfs_caches_init_early(); sort_main_extable(); trap_init(); |
444f478f6 init: introduce m... |
549 |
mm_init(); |
de03c72cf mm: convert mm->c... |
550 |
|
f631718de ftrace: Move ftra... |
551 |
ftrace_init(); |
e725c731e tracing: Split tr... |
552 553 |
/* trace_printk can be enabled here */ early_trace_init(); |
1da177e4c Linux-2.6.12-rc2 |
554 555 556 557 558 559 560 561 562 563 564 |
/* * Set up the scheduler prior starting any interrupts (such as the * timer interrupt). Full topology setup happens at smp_init() * time - but meanwhile we still have a functioning scheduler. */ sched_init(); /* * Disable preemption - early bootup scheduling is extremely * fragile until we cpu_idle() for the first time. */ preempt_disable(); |
dd4d9fecb init/main.c: code... |
565 566 567 |
if (WARN(!irqs_disabled(), "Interrupts were enabled *very* early, fixing it ")) |
c4a68306b [PATCH] start_ker... |
568 |
local_irq_disable(); |
0a835c4f0 Reimplement IDR a... |
569 |
radix_tree_init(); |
3347fa092 workqueue: make w... |
570 571 572 573 574 575 576 |
/* * Allow workqueue creation and work item queueing/cancelling * early. Work item execution depends on kthreads and starts after * workqueue_init(). */ workqueue_init_early(); |
1da177e4c Linux-2.6.12-rc2 |
577 |
rcu_init(); |
5f893b263 tracing: Move ena... |
578 |
|
e725c731e tracing: Split tr... |
579 |
/* Trace events are available after this */ |
5f893b263 tracing: Move ena... |
580 |
trace_init(); |
65f382fd0 context_tracking:... |
581 |
context_tracking_init(); |
0b8f1efad sparse irq_desc[]... |
582 583 |
/* init some links before init_ISA_irqs() */ early_irq_init(); |
1da177e4c Linux-2.6.12-rc2 |
584 |
init_IRQ(); |
ad2b13536 tick: Call tick_i... |
585 |
tick_init(); |
d6dd50e07 Merge branch 'cor... |
586 |
rcu_init_nohz(); |
1da177e4c Linux-2.6.12-rc2 |
587 |
init_timers(); |
c0a313296 [PATCH] hrtimer: ... |
588 |
hrtimers_init(); |
1da177e4c Linux-2.6.12-rc2 |
589 |
softirq_init(); |
ad596171e [PATCH] Time: Use... |
590 |
timekeeping_init(); |
88fecaa27 [PATCH] time init... |
591 |
time_init(); |
38ff87f77 sched_clock: Make... |
592 |
sched_clock_postinit(); |
f92bac3b1 printk: rename nm... |
593 |
printk_safe_init(); |
9e6302056 perf: Use hrtimer... |
594 |
perf_event_init(); |
93e028148 [PATCH] lockdep: ... |
595 |
profile_init(); |
d8ad7d112 generic-ipi: Fix ... |
596 |
call_function_init(); |
f91eb62f7 init: scream bloo... |
597 598 |
WARN(!irqs_disabled(), "Interrupts were enabled early "); |
2ce802f62 lockdep: Move ear... |
599 |
early_boot_irqs_disabled = false; |
93e028148 [PATCH] lockdep: ... |
600 |
local_irq_enable(); |
dcce284a2 mm: Extend gfp ma... |
601 |
|
7e85ee0c1 slab,slub: don't ... |
602 |
kmem_cache_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
603 604 605 606 607 608 609 610 |
/* * HACK ALERT! This is early. We're enabling the console before * we've done PCI setups etc, and console_init() must be aware of * this. But we do want output early, in case something goes wrong. */ console_init(); if (panic_later) |
499a4584d init: fix possibl... |
611 612 |
panic("Too many boot %s vars at `%s'", panic_later, panic_param); |
fbb9ce953 [PATCH] lockdep: ... |
613 614 |
lockdep_info(); |
9a11b49a8 [PATCH] lockdep: ... |
615 616 617 618 619 620 |
/* * Need to run this when irqs are enabled, because it wants * to self-test [hard/soft]-irqs on/off lock inversion bugs * too: */ locking_selftest(); |
c7753208a x86, swiotlb: Add... |
621 622 623 624 625 626 627 |
/* * This needs to be called before any devices perform DMA * operations that might use the SWIOTLB bounce buffers. It will * mark the bounce buffers as decrypted so that their usage will * not cause "plain-text" data to be decrypted when accessed. */ mem_encrypt_init(); |
1da177e4c Linux-2.6.12-rc2 |
628 629 |
#ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && !initrd_below_start_ok && |
bd673c7c3 initrd: cast `ini... |
630 |
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) { |
ea676e846 init/main.c: conv... |
631 632 |
pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it. ", |
bd673c7c3 initrd: cast `ini... |
633 634 |
page_to_pfn(virt_to_page((void *)initrd_start)), min_low_pfn); |
1da177e4c Linux-2.6.12-rc2 |
635 636 637 |
initrd_start = 0; } #endif |
fe53ca542 mm: use early_pfn... |
638 |
page_ext_init(); |
9b090f2da kmemleak: Initial... |
639 |
kmemleak_init(); |
caba4cbbd debugobjects: Mak... |
640 |
debug_objects_mem_init(); |
e7c8d5c99 [PATCH] node loca... |
641 |
setup_per_cpu_pageset(); |
1da177e4c Linux-2.6.12-rc2 |
642 643 644 645 646 |
numa_policy_init(); if (late_time_init) late_time_init(); calibrate_delay(); pidmap_init(); |
1da177e4c Linux-2.6.12-rc2 |
647 |
anon_vma_init(); |
c4e1acbb3 ACPI / init: Invo... |
648 |
acpi_early_init(); |
11520e5e7 Revert "x86-64/ef... |
649 |
#ifdef CONFIG_X86 |
83e681897 efi: Make 'efi_en... |
650 |
if (efi_enabled(EFI_RUNTIME_SERVICES)) |
11520e5e7 Revert "x86-64/ef... |
651 652 |
efi_enter_virtual_mode(); #endif |
b235beea9 Clarify naming of... |
653 |
thread_stack_cache_init(); |
d84f4f992 CRED: Inaugurate ... |
654 |
cred_init(); |
ff691f6e0 kernel/fork.c: ne... |
655 |
fork_init(); |
1da177e4c Linux-2.6.12-rc2 |
656 657 |
proc_caches_init(); buffer_init(); |
1da177e4c Linux-2.6.12-rc2 |
658 659 |
key_init(); security_init(); |
0b4b3827d x86, kgdb, init: ... |
660 |
dbg_late_init(); |
4248b0da4 fs, file table: r... |
661 |
vfs_caches_init(); |
629060270 mm: add PageWaite... |
662 |
pagecache_init(); |
1da177e4c Linux-2.6.12-rc2 |
663 |
signals_init(); |
1da177e4c Linux-2.6.12-rc2 |
664 |
proc_root_init(); |
e149ed2b8 take the targets ... |
665 |
nsfs_init(); |
1da177e4c Linux-2.6.12-rc2 |
666 |
cpuset_init(); |
695df2132 cpuset: initializ... |
667 |
cgroup_init(); |
c757249af [PATCH] per-task-... |
668 |
taskstats_init_early(); |
ca74e92b4 [PATCH] per-task-... |
669 |
delayacct_init(); |
1da177e4c Linux-2.6.12-rc2 |
670 671 |
check_bugs(); |
b064a8fa7 ACPI / init: Swit... |
672 |
acpi_subsystem_init(); |
e7ff3a476 x86/amd: Check fo... |
673 |
arch_post_acpi_subsys_init(); |
6ae6996a4 SFI: add platform... |
674 |
sfi_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
675 |
|
83e681897 efi: Make 'efi_en... |
676 |
if (efi_enabled(EFI_RUNTIME_SERVICES)) { |
785107923 efi: Defer freein... |
677 |
efi_free_boot_services(); |
2223af389 efi: Fix the ACPI... |
678 |
} |
785107923 efi: Defer freein... |
679 |
|
1da177e4c Linux-2.6.12-rc2 |
680 681 682 |
/* Do the rest non-__init'ed, we're now alive */ rest_init(); } |
b99b87f70 kernel: construct... |
683 684 685 686 |
/* Call all constructor functions linked into the kernel. */ static void __init do_ctors(void) { #ifdef CONFIG_CONSTRUCTORS |
196a15b4e init/main.c: fix ... |
687 |
ctor_fn_t *fn = (ctor_fn_t *) __ctors_start; |
b99b87f70 kernel: construct... |
688 |
|
196a15b4e init/main.c: fix ... |
689 690 |
for (; fn < (ctor_fn_t *) __ctors_end; fn++) (*fn)(); |
b99b87f70 kernel: construct... |
691 692 |
#endif } |
2329abfa3 module_param: mak... |
693 |
bool initcall_debug; |
d0ea3d7d2 Make initcall_deb... |
694 |
core_param(initcall_debug, initcall_debug, bool, 0644); |
1da177e4c Linux-2.6.12-rc2 |
695 |
|
7b0b73d76 init/main.c: add ... |
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 |
#ifdef CONFIG_KALLSYMS struct blacklist_entry { struct list_head next; char *buf; }; static __initdata_or_module LIST_HEAD(blacklisted_initcalls); static int __init initcall_blacklist(char *str) { char *str_entry; struct blacklist_entry *entry; /* str argument is a comma-separated list of functions */ do { str_entry = strsep(&str, ","); if (str_entry) { pr_debug("blacklisting initcall %s ", str_entry); entry = alloc_bootmem(sizeof(*entry)); entry->buf = alloc_bootmem(strlen(str_entry) + 1); strcpy(entry->buf, str_entry); list_add(&entry->next, &blacklisted_initcalls); } } while (str_entry); return 0; } static bool __init_or_module initcall_blacklisted(initcall_t fn) { |
7b0b73d76 init/main.c: add ... |
727 |
struct blacklist_entry *entry; |
c8cdd2be2 init/main.c: simp... |
728 |
char fn_name[KSYM_SYMBOL_LEN]; |
0fd5ed8d8 init/main.c: fix ... |
729 |
unsigned long addr; |
7b0b73d76 init/main.c: add ... |
730 |
|
c8cdd2be2 init/main.c: simp... |
731 |
if (list_empty(&blacklisted_initcalls)) |
7b0b73d76 init/main.c: add ... |
732 |
return false; |
0fd5ed8d8 init/main.c: fix ... |
733 734 |
addr = (unsigned long) dereference_function_descriptor(fn); sprint_symbol_no_offset(fn_name, addr); |
c8cdd2be2 init/main.c: simp... |
735 |
|
841c06d71 init: allow black... |
736 737 738 739 740 |
/* * fn will be "function_name [module_name]" where [module_name] is not * displayed for built-in init functions. Strip off the [module_name]. */ strreplace(fn_name, ' ', '\0'); |
e6fd1fb3b init/main.c: use ... |
741 |
list_for_each_entry(entry, &blacklisted_initcalls, next) { |
7b0b73d76 init/main.c: add ... |
742 743 744 |
if (!strcmp(fn_name, entry->buf)) { pr_debug("initcall %s blacklisted ", fn_name); |
7b0b73d76 init/main.c: add ... |
745 746 747 |
return true; } } |
7b0b73d76 init/main.c: add ... |
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 |
return false; } #else static int __init initcall_blacklist(char *str) { pr_warn("initcall_blacklist requires CONFIG_KALLSYMS "); return 0; } static bool __init_or_module initcall_blacklisted(initcall_t fn) { return false; } #endif __setup("initcall_blacklist=", initcall_blacklist); |
e44612713 init/main.c: mark... |
764 |
static int __init_or_module do_one_initcall_debug(initcall_t fn) |
1da177e4c Linux-2.6.12-rc2 |
765 |
{ |
742390728 tracing/fastboot:... |
766 |
ktime_t calltime, delta, rettime; |
30dbb20e6 tracing: Remove b... |
767 768 |
unsigned long long duration; int ret; |
1da177e4c Linux-2.6.12-rc2 |
769 |
|
d62cf8152 init/main.c: don'... |
770 771 |
printk(KERN_DEBUG "calling %pF @ %i ", fn, task_pid_nr(current)); |
22c5c03b4 init/main.c: fix ... |
772 |
calltime = ktime_get(); |
30dbb20e6 tracing: Remove b... |
773 |
ret = fn(); |
22c5c03b4 init/main.c: fix ... |
774 775 776 |
rettime = ktime_get(); delta = ktime_sub(rettime, calltime); duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
d62cf8152 init/main.c: don'... |
777 778 |
printk(KERN_DEBUG "initcall %pF returned %d after %lld usecs ", |
ea676e846 init/main.c: conv... |
779 |
fn, ret, duration); |
1da177e4c Linux-2.6.12-rc2 |
780 |
|
22c5c03b4 init/main.c: fix ... |
781 782 |
return ret; } |
e44612713 init/main.c: mark... |
783 |
int __init_or_module do_one_initcall(initcall_t fn) |
22c5c03b4 init/main.c: fix ... |
784 785 786 |
{ int count = preempt_count(); int ret; |
ff1c8fac8 init: remove perm... |
787 |
char msgbuf[64]; |
22c5c03b4 init/main.c: fix ... |
788 |
|
7b0b73d76 init/main.c: add ... |
789 790 |
if (initcall_blacklisted(fn)) return -EPERM; |
22c5c03b4 init/main.c: fix ... |
791 792 793 794 |
if (initcall_debug) ret = do_one_initcall_debug(fn); else ret = fn(); |
8f0c45cdf enhance initcall_... |
795 |
|
e0df154f4 Split up 'do_init... |
796 |
msgbuf[0] = 0; |
e662e1cfd init: don't lose ... |
797 |
|
e0df154f4 Split up 'do_init... |
798 |
if (preempt_count() != count) { |
bf5d770bd init: Do not warn... |
799 |
sprintf(msgbuf, "preemption imbalance "); |
4a2b4b222 sched: Introduce ... |
800 |
preempt_count_set(count); |
1da177e4c Linux-2.6.12-rc2 |
801 |
} |
e0df154f4 Split up 'do_init... |
802 |
if (irqs_disabled()) { |
a76bfd0da initcalls: Fix m6... |
803 |
strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf)); |
e0df154f4 Split up 'do_init... |
804 805 |
local_irq_enable(); } |
f91eb62f7 init: scream bloo... |
806 807 |
WARN(msgbuf[0], "initcall %pF returned with %s ", fn, msgbuf); |
59f9415ff modules: extend i... |
808 |
|
38addce8b gcc-plugins: Add ... |
809 |
add_latent_entropy(); |
30dbb20e6 tracing: Remove b... |
810 |
return ret; |
e0df154f4 Split up 'do_init... |
811 |
} |
026cee008 params: <level>_i... |
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 |
extern initcall_t __initcall_start[]; extern initcall_t __initcall0_start[]; extern initcall_t __initcall1_start[]; extern initcall_t __initcall2_start[]; extern initcall_t __initcall3_start[]; extern initcall_t __initcall4_start[]; extern initcall_t __initcall5_start[]; extern initcall_t __initcall6_start[]; extern initcall_t __initcall7_start[]; extern initcall_t __initcall_end[]; static initcall_t *initcall_levels[] __initdata = { __initcall0_start, __initcall1_start, __initcall2_start, __initcall3_start, __initcall4_start, __initcall5_start, __initcall6_start, __initcall7_start, __initcall_end, }; |
96263d286 init: add comment... |
834 |
/* Keep these in sync with initcalls in include/linux/init.h */ |
026cee008 params: <level>_i... |
835 |
static char *initcall_level_names[] __initdata = { |
9fb48c744 params: add 3rd a... |
836 837 838 839 840 841 842 843 |
"early", "core", "postcore", "arch", "subsys", "fs", "device", "late", |
026cee008 params: <level>_i... |
844 |
}; |
026cee008 params: <level>_i... |
845 |
static void __init do_initcall_level(int level) |
e0df154f4 Split up 'do_init... |
846 |
{ |
196a15b4e init/main.c: fix ... |
847 |
initcall_t *fn; |
e0df154f4 Split up 'do_init... |
848 |
|
08746a65c init: fix in-plac... |
849 |
strcpy(initcall_command_line, saved_command_line); |
026cee008 params: <level>_i... |
850 |
parse_args(initcall_level_names[level], |
08746a65c init: fix in-plac... |
851 |
initcall_command_line, __start___param, |
026cee008 params: <level>_i... |
852 853 |
__stop___param - __start___param, level, level, |
ecc861705 module: add extra... |
854 |
NULL, &repair_env_string); |
026cee008 params: <level>_i... |
855 856 |
for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++) |
196a15b4e init/main.c: fix ... |
857 |
do_one_initcall(*fn); |
1da177e4c Linux-2.6.12-rc2 |
858 |
} |
026cee008 params: <level>_i... |
859 860 861 |
static void __init do_initcalls(void) { int level; |
19efb72fd init: Drop initca... |
862 |
for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) |
026cee008 params: <level>_i... |
863 864 |
do_initcall_level(level); } |
1da177e4c Linux-2.6.12-rc2 |
865 866 867 868 869 870 871 872 873 |
/* * Ok, the machine is now initialized. None of the devices * have been touched yet, but the CPU subsystem is up and * running, and memory and process management works. * * Now we can finally start doing some real work.. */ static void __init do_basic_setup(void) { |
759ee0915 init,cpuset: fix ... |
874 |
cpuset_init_smp(); |
41ffe5d5c tmpfs: miscellane... |
875 |
shmem_init(); |
1da177e4c Linux-2.6.12-rc2 |
876 |
driver_init(); |
b04c3afb2 [PATCH] sysctl: m... |
877 |
init_irq_proc(); |
b99b87f70 kernel: construct... |
878 |
do_ctors(); |
d5767c535 bootup: move 'use... |
879 |
usermodehelper_enable(); |
b0f84374b bootup: move 'use... |
880 |
do_initcalls(); |
1da177e4c Linux-2.6.12-rc2 |
881 |
} |
7babe8db9 Full conversion t... |
882 |
static void __init do_pre_smp_initcalls(void) |
c2147a509 Better interface ... |
883 |
{ |
196a15b4e init/main.c: fix ... |
884 |
initcall_t *fn; |
c2147a509 Better interface ... |
885 |
|
026cee008 params: <level>_i... |
886 |
for (fn = __initcall_start; fn < __initcall0_start; fn++) |
196a15b4e init/main.c: fix ... |
887 |
do_one_initcall(*fn); |
c2147a509 Better interface ... |
888 |
} |
bb813f4c9 init, block: try ... |
889 890 891 892 893 894 895 896 897 898 |
/* * This function requests modules which should be loaded by default and is * called twice right after initrd is mounted and right before init is * exec'd. If such modules are on either initrd or rootfs, they will be * loaded before control is passed to userland. */ void __init load_default_modules(void) { load_default_elevator_module(); } |
a74fb73c1 infrastructure fo... |
899 |
static int run_init_process(const char *init_filename) |
1da177e4c Linux-2.6.12-rc2 |
900 901 |
{ argv_init[0] = init_filename; |
c4ad8f98b execve: use 'stru... |
902 |
return do_execve(getname_kernel(init_filename), |
ae903caae Bury the conditio... |
903 904 |
(const char __user *const __user *)argv_init, (const char __user *const __user *)envp_init); |
1da177e4c Linux-2.6.12-rc2 |
905 |
} |
ba24762bd init: make init f... |
906 907 908 909 910 911 912 913 914 915 916 917 918 919 |
static int try_to_run_init_process(const char *init_filename) { int ret; ret = run_init_process(init_filename); if (ret && ret != -ENOENT) { pr_err("Starting init: %s exists but couldn't execute it (error %d) ", init_filename, ret); } return ret; } |
f80b0c904 Ensure that kerne... |
920 |
static noinline void __init kernel_init_freeable(void); |
d6b212380 make sure that we... |
921 |
|
0f5bf6d0a arch: Rename CONF... |
922 |
#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) |
39290b389 module: extend 'r... |
923 |
bool rodata_enabled __ro_after_init = true; |
d2aa1acad mm/init: Add 'rod... |
924 925 926 927 928 |
static int __init set_debug_rodata(char *str) { return strtobool(str, &rodata_enabled); } __setup("rodata=", set_debug_rodata); |
39290b389 module: extend 'r... |
929 |
#endif |
d2aa1acad mm/init: Add 'rod... |
930 |
|
0f5bf6d0a arch: Rename CONF... |
931 |
#ifdef CONFIG_STRICT_KERNEL_RWX |
d2aa1acad mm/init: Add 'rod... |
932 933 |
static void mark_readonly(void) { |
2959a5f72 mm: add arch-inde... |
934 |
if (rodata_enabled) { |
20e557fb2 init: fix false p... |
935 936 937 938 939 940 941 |
/* * load_module() results in W+X mappings, which are cleaned up * with call_rcu_sched(). Let's make sure that queued work is * flushed so that we don't hit false positives looking for * insecure pages which are W+X. */ rcu_barrier_sched(); |
d2aa1acad mm/init: Add 'rod... |
942 |
mark_rodata_ro(); |
2959a5f72 mm: add arch-inde... |
943 944 |
rodata_test(); } else |
d2aa1acad mm/init: Add 'rod... |
945 946 947 948 949 950 951 952 953 954 |
pr_info("Kernel memory protection disabled. "); } #else static inline void mark_readonly(void) { pr_warn("This architecture does not have kernel memory protection. "); } #endif |
d6b212380 make sure that we... |
955 |
static int __ref kernel_init(void *unused) |
ee5bfa642 [PATCH] generic: ... |
956 |
{ |
ba24762bd init: make init f... |
957 |
int ret; |
d6b212380 make sure that we... |
958 |
kernel_init_freeable(); |
22a9d6456 async: Asynchrono... |
959 960 |
/* need to finish all async __init code before freeing the memory */ async_synchronize_full(); |
b80f0f6c9 ftrace: Have init... |
961 |
ftrace_free_init_mem(); |
ee5bfa642 [PATCH] generic: ... |
962 |
free_initmem(); |
d2aa1acad mm/init: Add 'rod... |
963 |
mark_readonly(); |
ee5bfa642 [PATCH] generic: ... |
964 965 |
system_state = SYSTEM_RUNNING; numa_default_policy(); |
967dcb8fe rcu: Wire up rcu_... |
966 |
rcu_end_inkernel_boot(); |
ee5bfa642 [PATCH] generic: ... |
967 |
if (ramdisk_execute_command) { |
ba24762bd init: make init f... |
968 969 |
ret = run_init_process(ramdisk_execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
970 |
return 0; |
ba24762bd init: make init f... |
971 972 973 |
pr_err("Failed to execute %s (error %d) ", ramdisk_execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
974 975 976 977 978 979 980 981 982 |
} /* * We try each of these until one succeeds. * * The Bourne shell can be used instead of init if we are * trying to recover a really broken machine. */ if (execute_command) { |
ba24762bd init: make init f... |
983 984 |
ret = run_init_process(execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
985 |
return 0; |
6ef4536e2 init: allow CONFI... |
986 987 |
panic("Requested init %s failed (error %d).", execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
988 |
} |
ba24762bd init: make init f... |
989 990 991 992 |
if (!try_to_run_init_process("/sbin/init") || !try_to_run_init_process("/etc/init") || !try_to_run_init_process("/bin/init") || !try_to_run_init_process("/bin/sh")) |
a74fb73c1 infrastructure fo... |
993 |
return 0; |
ee5bfa642 [PATCH] generic: ... |
994 |
|
ba24762bd init: make init f... |
995 |
panic("No working init found. Try passing init= option to kernel. " |
8c27ceff3 docs: fix locatio... |
996 |
"See Linux Documentation/admin-guide/init.rst for guidance."); |
ee5bfa642 [PATCH] generic: ... |
997 |
} |
f80b0c904 Ensure that kerne... |
998 |
static noinline void __init kernel_init_freeable(void) |
1da177e4c Linux-2.6.12-rc2 |
999 |
{ |
b433c3d45 init, sched: Fix ... |
1000 1001 1002 1003 |
/* * Wait until kthreadd is all set-up. */ wait_for_completion(&kthreadd_done); |
31a67102f Fix blocking allo... |
1004 1005 1006 |
/* Now the scheduler is fully set up and can do blocking allocations */ gfp_allowed_mask = __GFP_BITS_MASK; |
58568d2a8 cpuset,mm: update... |
1007 1008 1009 |
/* * init can allocate pages on any node */ |
3c466d46a init: use N_MEMOR... |
1010 |
set_mems_allowed(node_states[N_MEMORY]); |
1da177e4c Linux-2.6.12-rc2 |
1011 |
|
9ec52099e [PATCH] replace c... |
1012 |
cad_pid = task_pid(current); |
ca74a6f84 x86: optimize loc... |
1013 |
smp_prepare_cpus(setup_max_cpus); |
1da177e4c Linux-2.6.12-rc2 |
1014 |
|
3347fa092 workqueue: make w... |
1015 |
workqueue_init(); |
597b7305d mm: move mm_percp... |
1016 |
init_mm_internals(); |
1da177e4c Linux-2.6.12-rc2 |
1017 |
do_pre_smp_initcalls(); |
004417a6d perf, arch: Clean... |
1018 |
lockup_detector_init(); |
1da177e4c Linux-2.6.12-rc2 |
1019 |
|
1da177e4c Linux-2.6.12-rc2 |
1020 1021 |
smp_init(); sched_init_smp(); |
0e1cc95b4 mm: meminit: fini... |
1022 |
page_alloc_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
1023 |
do_basic_setup(); |
2bd3a997b init: Open /dev/c... |
1024 1025 |
/* Open the /dev/console on the rootfs, this should never fail */ if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) |
ea676e846 init/main.c: conv... |
1026 1027 |
pr_err("Warning: unable to open an initial console. "); |
2bd3a997b init: Open /dev/c... |
1028 1029 1030 |
(void) sys_dup(0); (void) sys_dup(0); |
1da177e4c Linux-2.6.12-rc2 |
1031 1032 1033 1034 |
/* * check if there is an early userspace init. If yes, let it do all * the work */ |
ffdfc4097 [PATCH] Add rdini... |
1035 1036 1037 1038 1039 1040 |
if (!ramdisk_execute_command) ramdisk_execute_command = "/init"; if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) { ramdisk_execute_command = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1041 |
prepare_namespace(); |
ffdfc4097 [PATCH] Add rdini... |
1042 |
} |
1da177e4c Linux-2.6.12-rc2 |
1043 1044 1045 1046 1047 |
/* * Ok, we have completed the initial bootup, and * we're essentially up and running. Get rid of the * initmem segments and start the user-mode stuff.. |
c9cd2ce2b integrity: provid... |
1048 1049 1050 |
* * rootfs is available now, try loading the public keys * and default modules |
1da177e4c Linux-2.6.12-rc2 |
1051 |
*/ |
bb813f4c9 init, block: try ... |
1052 |
|
c9cd2ce2b integrity: provid... |
1053 |
integrity_load_keys(); |
bb813f4c9 init, block: try ... |
1054 |
load_default_modules(); |
1da177e4c Linux-2.6.12-rc2 |
1055 |
} |