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init/main.c
35.4 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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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/memblock.h> |
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#include <linux/acpi.h> |
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#include <linux/bootconfig.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/sched/isolation.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> |
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#include <linux/utsname.h> |
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#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/driver.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 <linux/jump_label.h> |
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#include <linux/mem_encrypt.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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|
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#define CREATE_TRACE_POINTS #include <trace/events/initcall.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 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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|
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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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/* Untouched extra command line */ static char *extra_command_line; |
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/* Extra init arguments */ static char *extra_init_args; |
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|
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#ifdef CONFIG_BOOT_CONFIG /* Is bootconfig on command line? */ static bool bootconfig_found; static bool initargs_found; #else # define bootconfig_found false # define initargs_found false #endif |
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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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|
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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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|
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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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#ifdef CONFIG_BOOT_CONFIG |
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char xbc_namebuf[XBC_KEYLEN_MAX] __initdata; #define rest(dst, end) ((end) > (dst) ? (end) - (dst) : 0) static int __init xbc_snprint_cmdline(char *buf, size_t size, struct xbc_node *root) { struct xbc_node *knode, *vnode; char *end = buf + size; char c = '\"'; const char *val; int ret; xbc_node_for_each_key_value(root, knode, val) { ret = xbc_node_compose_key_after(root, knode, xbc_namebuf, XBC_KEYLEN_MAX); if (ret < 0) return ret; vnode = xbc_node_get_child(knode); ret = snprintf(buf, rest(buf, end), "%s%c", xbc_namebuf, vnode ? '=' : ' '); if (ret < 0) return ret; buf += ret; if (!vnode) continue; c = '\"'; xbc_array_for_each_value(vnode, val) { ret = snprintf(buf, rest(buf, end), "%c%s", c, val); if (ret < 0) return ret; buf += ret; c = ','; } if (rest(buf, end) > 2) strcpy(buf, "\" "); buf += 2; } return buf - (end - size); } #undef rest /* Make an extra command line under given key word */ static char * __init xbc_make_cmdline(const char *key) { struct xbc_node *root; char *new_cmdline; int ret, len = 0; root = xbc_find_node(key); if (!root) return NULL; /* Count required buffer size */ len = xbc_snprint_cmdline(NULL, 0, root); if (len <= 0) return NULL; new_cmdline = memblock_alloc(len + 1, SMP_CACHE_BYTES); if (!new_cmdline) { pr_err("Failed to allocate memory for extra kernel cmdline. "); return NULL; } ret = xbc_snprint_cmdline(new_cmdline, len + 1, root); if (ret < 0 || ret > len) { pr_err("Failed to print extra kernel cmdline. "); return NULL; } return new_cmdline; } |
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u32 boot_config_checksum(unsigned char *p, u32 size) { u32 ret = 0; while (size--) ret += *p++; return ret; } |
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static int __init bootconfig_params(char *param, char *val, const char *unused, void *arg) { if (strcmp(param, "bootconfig") == 0) { bootconfig_found = true; } else if (strcmp(param, "--") == 0) { initargs_found = true; } return 0; } |
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static void __init setup_boot_config(const char *cmdline) |
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{ |
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static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; |
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u32 size, csum; char *data, *copy; u32 *hdr; |
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int ret; |
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|
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strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL, bootconfig_params); if (!bootconfig_found) |
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return; |
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if (!initrd_end) goto not_found; |
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hdr = (u32 *)(initrd_end - 8); size = hdr[0]; csum = hdr[1]; |
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if (size >= XBC_DATA_MAX) { pr_err("bootconfig size %d greater than max size %d ", size, XBC_DATA_MAX); |
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return; |
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} |
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data = ((void *)hdr) - size; if ((unsigned long)data < initrd_start) |
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goto not_found; |
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|
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if (boot_config_checksum((unsigned char *)data, size) != csum) { pr_err("bootconfig checksum failed "); |
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return; |
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} |
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copy = memblock_alloc(size + 1, SMP_CACHE_BYTES); if (!copy) { |
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pr_err("Failed to allocate memory for bootconfig "); |
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return; } memcpy(copy, data, size); copy[size] = '\0'; |
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ret = xbc_init(copy); if (ret < 0) |
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pr_err("Failed to parse bootconfig "); |
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else { |
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pr_info("Load bootconfig: %d bytes %d nodes ", size, ret); |
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/* keys starting with "kernel." are passed via cmdline */ extra_command_line = xbc_make_cmdline("kernel"); |
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/* Also, "init." keys are init arguments */ extra_init_args = xbc_make_cmdline("init"); |
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} |
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return; not_found: pr_err("'bootconfig' found on command line, but no bootconfig found "); |
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} #else |
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#define setup_boot_config(cmdline) do { } while (0) |
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#endif |
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/* Change NUL term back to "=", to make "param" the whole string. */ |
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static void __init repair_env_string(char *param, char *val) |
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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); |
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} else BUG(); } |
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} |
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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); |
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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) |
a99cd1125 init: fix bug whe... |
455 |
{ |
283900e82 init/main.c: fix ... |
456 |
size_t len = strlen(param); |
7e2762e1d init/main.c: remo... |
457 |
repair_env_string(param, val); |
1da177e4c Linux-2.6.12-rc2 |
458 459 460 461 |
/* Handle obsolete-style parameters */ if (obsolete_checksetup(param)) return 0; |
f066a4f6d param: don't comp... |
462 |
/* Unused module parameter. */ |
283900e82 init/main.c: fix ... |
463 |
if (strnchr(param, len, '.')) |
1da177e4c Linux-2.6.12-rc2 |
464 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
465 466 467 468 469 470 471 472 473 |
if (panic_later) return 0; if (val) { /* Environment option */ unsigned int i; for (i = 0; envp_init[i]; i++) { if (i == MAX_INIT_ENVS) { |
499a4584d init: fix possibl... |
474 |
panic_later = "env"; |
1da177e4c Linux-2.6.12-rc2 |
475 476 |
panic_param = param; } |
283900e82 init/main.c: fix ... |
477 |
if (!strncmp(param, envp_init[i], len+1)) |
1da177e4c Linux-2.6.12-rc2 |
478 479 480 481 482 483 484 485 |
break; } envp_init[i] = param; } else { /* Command line option */ unsigned int i; for (i = 0; argv_init[i]; i++) { if (i == MAX_INIT_ARGS) { |
499a4584d init: fix possibl... |
486 |
panic_later = "init"; |
1da177e4c Linux-2.6.12-rc2 |
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 |
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); |
ffdfc4097 [PATCH] Add rdini... |
511 512 513 514 515 516 517 518 519 520 521 |
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); |
1da177e4c Linux-2.6.12-rc2 |
522 |
#ifndef CONFIG_SMP |
34db18a05 smp: move smp set... |
523 |
static const unsigned int setup_max_cpus = NR_CPUS; |
e0982e90c init: move setup ... |
524 |
static inline void setup_nr_cpu_ids(void) { } |
1da177e4c Linux-2.6.12-rc2 |
525 |
static inline void smp_prepare_cpus(unsigned int maxcpus) { } |
1da177e4c Linux-2.6.12-rc2 |
526 527 528 |
#endif /* |
30d7e0d46 [PATCH] Dynamic k... |
529 530 531 532 533 534 535 |
* 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) { |
131991620 bootconfig: init:... |
536 |
size_t len, xlen = 0, ilen = 0; |
f5c7310ac init/main: add ch... |
537 |
|
51887d03a bootconfig: init:... |
538 539 |
if (extra_command_line) xlen = strlen(extra_command_line); |
131991620 bootconfig: init:... |
540 541 |
if (extra_init_args) ilen = strlen(extra_init_args) + 4; /* for " -- " */ |
f5c7310ac init/main: add ch... |
542 |
|
51887d03a bootconfig: init:... |
543 |
len = xlen + strlen(boot_command_line) + 1; |
f5c7310ac init/main: add ch... |
544 |
|
131991620 bootconfig: init:... |
545 |
saved_command_line = memblock_alloc(len + ilen, SMP_CACHE_BYTES); |
f5c7310ac init/main: add ch... |
546 |
if (!saved_command_line) |
131991620 bootconfig: init:... |
547 548 |
panic("%s: Failed to allocate %zu bytes ", __func__, len + ilen); |
f5c7310ac init/main: add ch... |
549 550 551 552 553 |
static_command_line = memblock_alloc(len, SMP_CACHE_BYTES); if (!static_command_line) panic("%s: Failed to allocate %zu bytes ", __func__, len); |
51887d03a bootconfig: init:... |
554 555 556 557 558 559 560 561 562 563 564 |
if (xlen) { /* * We have to put extra_command_line before boot command * lines because there could be dashes (separator of init * command line) in the command lines. */ strcpy(saved_command_line, extra_command_line); strcpy(static_command_line, extra_command_line); } strcpy(saved_command_line + xlen, boot_command_line); strcpy(static_command_line + xlen, command_line); |
131991620 bootconfig: init:... |
565 566 567 568 569 570 571 572 |
if (ilen) { /* * Append supplemental init boot args to saved_command_line * so that user can check what command line options passed * to init. */ len = strlen(saved_command_line); |
f61872bb5 bootconfig: Use p... |
573 574 575 |
if (initargs_found) { saved_command_line[len++] = ' '; } else { |
131991620 bootconfig: init:... |
576 577 |
strcpy(saved_command_line + len, " -- "); len += 4; |
f61872bb5 bootconfig: Use p... |
578 |
} |
131991620 bootconfig: init:... |
579 580 581 |
strcpy(saved_command_line + len, extra_init_args); } |
30d7e0d46 [PATCH] Dynamic k... |
582 583 584 |
} /* |
1da177e4c Linux-2.6.12-rc2 |
585 586 587 588 589 590 591 |
* 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. */ |
b433c3d45 init, sched: Fix ... |
592 |
static __initdata DECLARE_COMPLETION(kthreadd_done); |
53c99bd66 init: add arch_ca... |
593 |
noinline void __ref rest_init(void) |
1da177e4c Linux-2.6.12-rc2 |
594 |
{ |
8fb12156b init: Pin init ta... |
595 |
struct task_struct *tsk; |
73c279927 kthread: don't de... |
596 |
int pid; |
7db905e63 rcu: Move end of ... |
597 |
rcu_scheduler_starting(); |
b433c3d45 init, sched: Fix ... |
598 |
/* |
971585692 init: Fix comment |
599 |
* We need to spawn init first so that it obtains pid 1, however |
b433c3d45 init, sched: Fix ... |
600 601 602 |
* the init task will end up wanting to create kthreads, which, if * we schedule it before we create kthreadd, will OOPS. */ |
8fb12156b init: Pin init ta... |
603 604 605 606 607 608 609 610 611 612 |
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(); |
1da177e4c Linux-2.6.12-rc2 |
613 |
numa_default_policy(); |
73c279927 kthread: don't de... |
614 |
pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES); |
d11c563dd sched: Use lockde... |
615 |
rcu_read_lock(); |
5cd204550 Deprecate find_ta... |
616 |
kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns); |
d11c563dd sched: Use lockde... |
617 |
rcu_read_unlock(); |
1c3c5eab1 sched/core: Enabl... |
618 619 620 |
/* * Enable might_sleep() and smp_processor_id() checks. |
c1a280b68 sched/preempt: Us... |
621 |
* They cannot be enabled earlier because with CONFIG_PREEMPTION=y |
1c3c5eab1 sched/core: Enabl... |
622 623 624 625 626 |
* 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; |
b433c3d45 init, sched: Fix ... |
627 |
complete(&kthreadd_done); |
f340c0d1a [PATCH] Tweak idl... |
628 629 630 |
/* * The boot idle thread must execute schedule() |
1df21055e sched: add init_i... |
631 |
* at least once to get things moving: |
f340c0d1a [PATCH] Tweak idl... |
632 |
*/ |
bd2f55361 sched/rt: Use sch... |
633 |
schedule_preempt_disabled(); |
5bfb5d690 [PATCH] sched: di... |
634 |
/* Call into cpu_idle with preempt disabled */ |
a1a04ec3c idle: Provide a g... |
635 |
cpu_startup_entry(CPUHP_ONLINE); |
1df21055e sched: add init_i... |
636 |
} |
1da177e4c Linux-2.6.12-rc2 |
637 638 |
/* Check for early params. */ |
ecc861705 module: add extra... |
639 640 |
static int __init do_early_param(char *param, char *val, const char *unused, void *arg) |
1da177e4c Linux-2.6.12-rc2 |
641 |
{ |
914dcaa84 param: make param... |
642 |
const struct obs_kernel_param *p; |
1da177e4c Linux-2.6.12-rc2 |
643 644 |
for (p = __setup_start; p < __setup_end; p++) { |
b1e4d20cb params: make dash... |
645 |
if ((p->early && parameq(param, p->str)) || |
18a8bd949 serial: convert e... |
646 647 648 |
(strcmp(param, "console") == 0 && strcmp(p->str, "earlycon") == 0) ) { |
1da177e4c Linux-2.6.12-rc2 |
649 |
if (p->setup_func(val) != 0) |
ea676e846 init/main.c: conv... |
650 651 |
pr_warn("Malformed early option '%s' ", param); |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 655 656 |
} } /* We accept everything at this stage. */ return 0; } |
13977091a Driver Core: earl... |
657 658 |
void __init parse_early_options(char *cmdline) { |
ecc861705 module: add extra... |
659 660 |
parse_args("early options", cmdline, NULL, 0, 0, 0, NULL, do_early_param); |
13977091a Driver Core: earl... |
661 |
} |
1da177e4c Linux-2.6.12-rc2 |
662 663 664 |
/* Arch code calls this early on, or if not, just before other parsing. */ void __init parse_early_param(void) { |
dd4d9fecb init/main.c: code... |
665 666 |
static int done __initdata; static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 |
if (done) return; /* All fall through to do_early_param. */ |
30d7e0d46 [PATCH] Dynamic k... |
672 |
strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); |
13977091a Driver Core: earl... |
673 |
parse_early_options(tmp_cmdline); |
1da177e4c Linux-2.6.12-rc2 |
674 675 |
done = 1; } |
e7ff3a476 x86/amd: Check fo... |
676 |
void __init __weak arch_post_acpi_subsys_init(void) { } |
839ad62e7 [POWERPC] Use __w... |
677 |
void __init __weak smp_setup_processor_id(void) |
033ab7f8e [PATCH] add smp_s... |
678 679 |
{ } |
eded09ccf FRV: gcc-4.1.2 al... |
680 |
# if THREAD_SIZE >= PAGE_SIZE |
b235beea9 Clarify naming of... |
681 |
void __init __weak thread_stack_cache_init(void) |
8c9843e57 [POWERPC] Add thr... |
682 683 |
{ } |
eded09ccf FRV: gcc-4.1.2 al... |
684 |
#endif |
8c9843e57 [POWERPC] Add thr... |
685 |
|
c7753208a x86, swiotlb: Add... |
686 |
void __init __weak mem_encrypt_init(void) { } |
4fc19708b x86/alternatives:... |
687 |
void __init __weak poking_init(void) { } |
782de70c4 mm: consolidate p... |
688 |
void __init __weak pgtable_cache_init(void) { } |
caa841360 x86/mm: Initializ... |
689 |
|
4e37958d1 init, tracing: Ha... |
690 691 |
bool initcall_debug; core_param(initcall_debug, initcall_debug, bool, 0644); |
b0dc52f15 init: Have initca... |
692 693 |
#ifdef TRACEPOINTS_ENABLED |
4e37958d1 init, tracing: Ha... |
694 |
static void __init initcall_debug_enable(void); |
b0dc52f15 init: Have initca... |
695 696 697 698 699 |
#else static inline void initcall_debug_enable(void) { } #endif |
4e37958d1 init, tracing: Ha... |
700 |
|
23a5c8cb7 mm: init: report ... |
701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 |
/* Report memory auto-initialization states for this boot. */ static void __init report_meminit(void) { const char *stack; if (IS_ENABLED(CONFIG_INIT_STACK_ALL)) stack = "all"; else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)) stack = "byref_all"; else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF)) stack = "byref"; else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_USER)) stack = "__user"; else stack = "off"; pr_info("mem auto-init: stack:%s, heap alloc:%s, heap free:%s ", stack, want_init_on_alloc(GFP_KERNEL) ? "on" : "off", want_init_on_free() ? "on" : "off"); if (want_init_on_free()) pr_info("mem auto-init: clearing system memory may take some time... "); } |
444f478f6 init: introduce m... |
725 726 727 728 729 |
/* * Set up kernel memory allocators */ static void __init mm_init(void) { |
eefa864b7 mm/page_ext: resu... |
730 731 732 733 734 |
/* * page_ext requires contiguous pages, * bigger than MAX_ORDER unless SPARSEMEM. */ page_ext_init_flatmem(); |
8e57f8acb mm, debug_pageall... |
735 |
init_debug_pagealloc(); |
23a5c8cb7 mm: init: report ... |
736 |
report_meminit(); |
444f478f6 init: introduce m... |
737 738 |
mem_init(); kmem_cache_init(); |
c56658681 mm: kmemleak: use... |
739 |
kmemleak_init(); |
b35f1819a mm: create a sepa... |
740 |
pgtable_init(); |
a9ee3a63d debugobjects: cal... |
741 |
debug_objects_mem_init(); |
444f478f6 init: introduce m... |
742 |
vmalloc_init(); |
0ddab1d2e lib/ioremap.c: ad... |
743 |
ioremap_huge_init(); |
613e396bc init: Invoke init... |
744 745 |
/* Should be run before the first non-init thread is created */ init_espfix_bsp(); |
aa8c6248f x86/mm/pti: Add i... |
746 747 |
/* Should be run after espfix64 is set up. */ pti_init(); |
444f478f6 init: introduce m... |
748 |
} |
53c99bd66 init: add arch_ca... |
749 750 751 752 |
void __init __weak arch_call_rest_init(void) { rest_init(); } |
722a9f929 asmlinkage: Add e... |
753 |
asmlinkage __visible void __init start_kernel(void) |
1da177e4c Linux-2.6.12-rc2 |
754 |
{ |
dd4d9fecb init/main.c: code... |
755 756 |
char *command_line; char *after_dashes; |
033ab7f8e [PATCH] add smp_s... |
757 |
|
d4311ff1a init/main.c: Give... |
758 |
set_task_stack_end_magic(&init_task); |
73839c5b2 init/main.c: Exec... |
759 |
smp_setup_processor_id(); |
3ac7fe5a4 infrastructure to... |
760 |
debug_objects_early_init(); |
420594296 x86: fix the stac... |
761 |
|
ddbcc7e8e Task Control Grou... |
762 |
cgroup_init_early(); |
fbb9ce953 [PATCH] lockdep: ... |
763 764 |
local_irq_disable(); |
2ce802f62 lockdep: Move ear... |
765 |
early_boot_irqs_disabled = true; |
fbb9ce953 [PATCH] lockdep: ... |
766 |
|
1b3b3b49b init/main: proper... |
767 768 769 770 |
/* * Interrupts are still disabled. Do necessary setups, then * enable them. */ |
44fd22992 [PATCH] Register ... |
771 |
boot_cpu_init(); |
1da177e4c Linux-2.6.12-rc2 |
772 |
page_address_init(); |
ea676e846 init/main.c: conv... |
773 |
pr_notice("%s", linux_banner); |
e6b1db98c security: Support... |
774 |
early_security_init(); |
1da177e4c Linux-2.6.12-rc2 |
775 |
setup_arch(&command_line); |
7495e0926 bootconfig: Only ... |
776 |
setup_boot_config(command_line); |
30d7e0d46 [PATCH] Dynamic k... |
777 |
setup_command_line(command_line); |
e0982e90c init: move setup ... |
778 |
setup_nr_cpu_ids(); |
d6647bdf9 init: set nr_cpu_... |
779 |
setup_per_cpu_areas(); |
44fd22992 [PATCH] Register ... |
780 |
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ |
b5b1404d0 init: rename and ... |
781 |
boot_cpu_hotplug_init(); |
1da177e4c Linux-2.6.12-rc2 |
782 |
|
72675e131 mm, memory_hotplu... |
783 |
build_all_zonelists(NULL); |
83b519e8b slab: setup alloc... |
784 |
page_alloc_init(); |
51887d03a bootconfig: init:... |
785 786 |
pr_notice("Kernel command line: %s ", saved_command_line); |
6041186a3 init: initialize ... |
787 788 |
/* parameters may set static keys */ jump_label_init(); |
83b519e8b slab: setup alloc... |
789 |
parse_early_param(); |
51e158c12 param: hand argum... |
790 791 792 |
after_dashes = parse_args("Booting kernel", static_command_line, __start___param, __stop___param - __start___param, |
ecc861705 module: add extra... |
793 |
-1, -1, NULL, &unknown_bootoption); |
3438cf549 param: fix crash ... |
794 |
if (!IS_ERR_OR_NULL(after_dashes)) |
51e158c12 param: hand argum... |
795 |
parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, |
ecc861705 module: add extra... |
796 |
NULL, set_init_arg); |
131991620 bootconfig: init:... |
797 798 799 |
if (extra_init_args) parse_args("Setting extra init args", extra_init_args, NULL, 0, -1, -1, NULL, set_init_arg); |
97ce2c88f jump-label: initi... |
800 |
|
83b519e8b slab: setup alloc... |
801 802 803 804 |
/* * These use large bootmem allocations and must precede * kmem_cache_init() */ |
162a7e750 printk: allocate ... |
805 |
setup_log_buf(0); |
83b519e8b slab: setup alloc... |
806 807 808 |
vfs_caches_init_early(); sort_main_extable(); trap_init(); |
444f478f6 init: introduce m... |
809 |
mm_init(); |
de03c72cf mm: convert mm->c... |
810 |
|
f631718de ftrace: Move ftra... |
811 |
ftrace_init(); |
e725c731e tracing: Split tr... |
812 813 |
/* trace_printk can be enabled here */ early_trace_init(); |
1da177e4c Linux-2.6.12-rc2 |
814 815 816 817 818 819 820 821 822 823 824 |
/* * 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... |
825 826 827 |
if (WARN(!irqs_disabled(), "Interrupts were enabled *very* early, fixing it ")) |
c4a68306b [PATCH] start_ker... |
828 |
local_irq_disable(); |
0a835c4f0 Reimplement IDR a... |
829 |
radix_tree_init(); |
3347fa092 workqueue: make w... |
830 831 |
/* |
7d229c668 main: kernel_star... |
832 833 834 835 836 837 |
* Set up housekeeping before setting up workqueues to allow the unbound * workqueue to take non-housekeeping into account. */ housekeeping_init(); /* |
3347fa092 workqueue: make w... |
838 839 840 841 842 |
* 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 |
843 |
rcu_init(); |
5f893b263 tracing: Move ena... |
844 |
|
e725c731e tracing: Split tr... |
845 |
/* Trace events are available after this */ |
5f893b263 tracing: Move ena... |
846 |
trace_init(); |
4e37958d1 init, tracing: Ha... |
847 848 |
if (initcall_debug) initcall_debug_enable(); |
65f382fd0 context_tracking:... |
849 |
context_tracking_init(); |
0b8f1efad sparse irq_desc[]... |
850 851 |
/* init some links before init_ISA_irqs() */ early_irq_init(); |
1da177e4c Linux-2.6.12-rc2 |
852 |
init_IRQ(); |
ad2b13536 tick: Call tick_i... |
853 |
tick_init(); |
d6dd50e07 Merge branch 'cor... |
854 |
rcu_init_nohz(); |
1da177e4c Linux-2.6.12-rc2 |
855 |
init_timers(); |
c0a313296 [PATCH] hrtimer: ... |
856 |
hrtimers_init(); |
1da177e4c Linux-2.6.12-rc2 |
857 |
softirq_init(); |
ad596171e [PATCH] Time: Use... |
858 |
timekeeping_init(); |
d55535232 random: move rand... |
859 860 861 862 863 864 865 866 867 868 869 870 871 |
/* * For best initial stack canary entropy, prepare it after: * - setup_arch() for any UEFI RNG entropy and boot cmdline access * - timekeeping_init() for ktime entropy used in rand_initialize() * - rand_initialize() to get any arch-specific entropy like RDRAND * - add_latent_entropy() to get any latent entropy * - adding command line entropy */ rand_initialize(); add_latent_entropy(); add_device_randomness(command_line, strlen(command_line)); boot_init_stack_canary(); |
88fecaa27 [PATCH] time init... |
872 |
time_init(); |
f92bac3b1 printk: rename nm... |
873 |
printk_safe_init(); |
9e6302056 perf: Use hrtimer... |
874 |
perf_event_init(); |
93e028148 [PATCH] lockdep: ... |
875 |
profile_init(); |
d8ad7d112 generic-ipi: Fix ... |
876 |
call_function_init(); |
f91eb62f7 init: scream bloo... |
877 878 |
WARN(!irqs_disabled(), "Interrupts were enabled early "); |
c3bc8fd63 tracing: Centrali... |
879 |
|
2ce802f62 lockdep: Move ear... |
880 |
early_boot_irqs_disabled = false; |
93e028148 [PATCH] lockdep: ... |
881 |
local_irq_enable(); |
dcce284a2 mm: Extend gfp ma... |
882 |
|
7e85ee0c1 slab,slub: don't ... |
883 |
kmem_cache_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
884 885 886 887 888 889 890 891 |
/* * 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... |
892 893 |
panic("Too many boot %s vars at `%s'", panic_later, panic_param); |
fbb9ce953 [PATCH] lockdep: ... |
894 |
|
c3bc8fd63 tracing: Centrali... |
895 |
lockdep_init(); |
fbb9ce953 [PATCH] lockdep: ... |
896 |
|
9a11b49a8 [PATCH] lockdep: ... |
897 898 899 900 901 902 |
/* * 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... |
903 904 905 906 907 908 909 |
/* * 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 |
910 911 |
#ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && !initrd_below_start_ok && |
bd673c7c3 initrd: cast `ini... |
912 |
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) { |
ea676e846 init/main.c: conv... |
913 914 |
pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it. ", |
bd673c7c3 initrd: cast `ini... |
915 916 |
page_to_pfn(virt_to_page((void *)initrd_start)), min_low_pfn); |
1da177e4c Linux-2.6.12-rc2 |
917 918 919 |
initrd_start = 0; } #endif |
e7c8d5c99 [PATCH] node loca... |
920 |
setup_per_cpu_pageset(); |
1da177e4c Linux-2.6.12-rc2 |
921 |
numa_policy_init(); |
9c71206d0 ACPI/init: Invoke... |
922 |
acpi_early_init(); |
1da177e4c Linux-2.6.12-rc2 |
923 924 |
if (late_time_init) late_time_init(); |
857baa87b sched/clock: Enab... |
925 |
sched_clock_init(); |
1da177e4c Linux-2.6.12-rc2 |
926 |
calibrate_delay(); |
95846ecf9 pid: replace pid ... |
927 |
pid_idr_init(); |
1da177e4c Linux-2.6.12-rc2 |
928 |
anon_vma_init(); |
11520e5e7 Revert "x86-64/ef... |
929 |
#ifdef CONFIG_X86 |
83e681897 efi: Make 'efi_en... |
930 |
if (efi_enabled(EFI_RUNTIME_SERVICES)) |
11520e5e7 Revert "x86-64/ef... |
931 932 |
efi_enter_virtual_mode(); #endif |
b235beea9 Clarify naming of... |
933 |
thread_stack_cache_init(); |
d84f4f992 CRED: Inaugurate ... |
934 |
cred_init(); |
ff691f6e0 kernel/fork.c: ne... |
935 |
fork_init(); |
1da177e4c Linux-2.6.12-rc2 |
936 |
proc_caches_init(); |
3ea056c50 uts: create "stru... |
937 |
uts_ns_init(); |
1da177e4c Linux-2.6.12-rc2 |
938 |
buffer_init(); |
1da177e4c Linux-2.6.12-rc2 |
939 940 |
key_init(); security_init(); |
0b4b3827d x86, kgdb, init: ... |
941 |
dbg_late_init(); |
4248b0da4 fs, file table: r... |
942 |
vfs_caches_init(); |
629060270 mm: add PageWaite... |
943 |
pagecache_init(); |
1da177e4c Linux-2.6.12-rc2 |
944 |
signals_init(); |
096523203 seq_file: allocat... |
945 |
seq_file_init(); |
1da177e4c Linux-2.6.12-rc2 |
946 |
proc_root_init(); |
e149ed2b8 take the targets ... |
947 |
nsfs_init(); |
1da177e4c Linux-2.6.12-rc2 |
948 |
cpuset_init(); |
695df2132 cpuset: initializ... |
949 |
cgroup_init(); |
c757249af [PATCH] per-task-... |
950 |
taskstats_init_early(); |
ca74e92b4 [PATCH] per-task-... |
951 |
delayacct_init(); |
1da177e4c Linux-2.6.12-rc2 |
952 |
|
4fc19708b x86/alternatives:... |
953 |
poking_init(); |
1da177e4c Linux-2.6.12-rc2 |
954 |
check_bugs(); |
b064a8fa7 ACPI / init: Swit... |
955 |
acpi_subsystem_init(); |
e7ff3a476 x86/amd: Check fo... |
956 |
arch_post_acpi_subsys_init(); |
6ae6996a4 SFI: add platform... |
957 |
sfi_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
958 959 |
/* Do the rest non-__init'ed, we're now alive */ |
53c99bd66 init: add arch_ca... |
960 |
arch_call_rest_init(); |
1da177e4c Linux-2.6.12-rc2 |
961 |
} |
b99b87f70 kernel: construct... |
962 963 964 965 |
/* Call all constructor functions linked into the kernel. */ static void __init do_ctors(void) { #ifdef CONFIG_CONSTRUCTORS |
196a15b4e init/main.c: fix ... |
966 |
ctor_fn_t *fn = (ctor_fn_t *) __ctors_start; |
b99b87f70 kernel: construct... |
967 |
|
196a15b4e init/main.c: fix ... |
968 969 |
for (; fn < (ctor_fn_t *) __ctors_end; fn++) (*fn)(); |
b99b87f70 kernel: construct... |
970 971 |
#endif } |
7b0b73d76 init/main.c: add ... |
972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 |
#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); |
7e1c4e279 memblock: stop us... |
991 992 |
entry = memblock_alloc(sizeof(*entry), SMP_CACHE_BYTES); |
f5c7310ac init/main: add ch... |
993 994 995 996 |
if (!entry) panic("%s: Failed to allocate %zu bytes ", __func__, sizeof(*entry)); |
7e1c4e279 memblock: stop us... |
997 998 |
entry->buf = memblock_alloc(strlen(str_entry) + 1, SMP_CACHE_BYTES); |
f5c7310ac init/main: add ch... |
999 1000 1001 1002 |
if (!entry->buf) panic("%s: Failed to allocate %zu bytes ", __func__, strlen(str_entry) + 1); |
7b0b73d76 init/main.c: add ... |
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 |
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 ... |
1013 |
struct blacklist_entry *entry; |
c8cdd2be2 init/main.c: simp... |
1014 |
char fn_name[KSYM_SYMBOL_LEN]; |
0fd5ed8d8 init/main.c: fix ... |
1015 |
unsigned long addr; |
7b0b73d76 init/main.c: add ... |
1016 |
|
c8cdd2be2 init/main.c: simp... |
1017 |
if (list_empty(&blacklisted_initcalls)) |
7b0b73d76 init/main.c: add ... |
1018 |
return false; |
0fd5ed8d8 init/main.c: fix ... |
1019 1020 |
addr = (unsigned long) dereference_function_descriptor(fn); sprint_symbol_no_offset(fn_name, addr); |
c8cdd2be2 init/main.c: simp... |
1021 |
|
841c06d71 init: allow black... |
1022 1023 1024 1025 1026 |
/* * 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 ... |
1027 |
list_for_each_entry(entry, &blacklisted_initcalls, next) { |
7b0b73d76 init/main.c: add ... |
1028 1029 1030 |
if (!strcmp(fn_name, entry->buf)) { pr_debug("initcall %s blacklisted ", fn_name); |
7b0b73d76 init/main.c: add ... |
1031 1032 1033 |
return true; } } |
7b0b73d76 init/main.c: add ... |
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 |
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); |
4e37958d1 init, tracing: Ha... |
1050 1051 |
static __init_or_module void trace_initcall_start_cb(void *data, initcall_t fn) |
1da177e4c Linux-2.6.12-rc2 |
1052 |
{ |
4e37958d1 init, tracing: Ha... |
1053 |
ktime_t *calltime = (ktime_t *)data; |
1da177e4c Linux-2.6.12-rc2 |
1054 |
|
d75f773c8 treewide: Switch ... |
1055 1056 |
printk(KERN_DEBUG "calling %pS @ %i ", fn, task_pid_nr(current)); |
4e37958d1 init, tracing: Ha... |
1057 1058 1059 1060 1061 1062 1063 1064 1065 |
*calltime = ktime_get(); } static __init_or_module void trace_initcall_finish_cb(void *data, initcall_t fn, int ret) { ktime_t *calltime = (ktime_t *)data; ktime_t delta, rettime; unsigned long long duration; |
22c5c03b4 init/main.c: fix ... |
1066 |
rettime = ktime_get(); |
4e37958d1 init, tracing: Ha... |
1067 |
delta = ktime_sub(rettime, *calltime); |
22c5c03b4 init/main.c: fix ... |
1068 |
duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
d75f773c8 treewide: Switch ... |
1069 1070 |
printk(KERN_DEBUG "initcall %pS returned %d after %lld usecs ", |
ea676e846 init/main.c: conv... |
1071 |
fn, ret, duration); |
4e37958d1 init, tracing: Ha... |
1072 |
} |
1da177e4c Linux-2.6.12-rc2 |
1073 |
|
4e37958d1 init, tracing: Ha... |
1074 |
static ktime_t initcall_calltime; |
b0dc52f15 init: Have initca... |
1075 |
#ifdef TRACEPOINTS_ENABLED |
4e37958d1 init, tracing: Ha... |
1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 |
static void __init initcall_debug_enable(void) { int ret; ret = register_trace_initcall_start(trace_initcall_start_cb, &initcall_calltime); ret |= register_trace_initcall_finish(trace_initcall_finish_cb, &initcall_calltime); WARN(ret, "Failed to register initcall tracepoints "); |
22c5c03b4 init/main.c: fix ... |
1086 |
} |
b0dc52f15 init: Have initca... |
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 |
# define do_trace_initcall_start trace_initcall_start # define do_trace_initcall_finish trace_initcall_finish #else static inline void do_trace_initcall_start(initcall_t fn) { if (!initcall_debug) return; trace_initcall_start_cb(&initcall_calltime, fn); } static inline void do_trace_initcall_finish(initcall_t fn, int ret) { if (!initcall_debug) return; trace_initcall_finish_cb(&initcall_calltime, fn, ret); } #endif /* !TRACEPOINTS_ENABLED */ |
22c5c03b4 init/main.c: fix ... |
1103 |
|
e44612713 init/main.c: mark... |
1104 |
int __init_or_module do_one_initcall(initcall_t fn) |
22c5c03b4 init/main.c: fix ... |
1105 1106 |
{ int count = preempt_count(); |
ff1c8fac8 init: remove perm... |
1107 |
char msgbuf[64]; |
4e37958d1 init, tracing: Ha... |
1108 |
int ret; |
22c5c03b4 init/main.c: fix ... |
1109 |
|
7b0b73d76 init/main.c: add ... |
1110 1111 |
if (initcall_blacklisted(fn)) return -EPERM; |
b0dc52f15 init: Have initca... |
1112 |
do_trace_initcall_start(fn); |
4e37958d1 init, tracing: Ha... |
1113 |
ret = fn(); |
b0dc52f15 init: Have initca... |
1114 |
do_trace_initcall_finish(fn, ret); |
8f0c45cdf enhance initcall_... |
1115 |
|
e0df154f4 Split up 'do_init... |
1116 |
msgbuf[0] = 0; |
e662e1cfd init: don't lose ... |
1117 |
|
e0df154f4 Split up 'do_init... |
1118 |
if (preempt_count() != count) { |
bf5d770bd init: Do not warn... |
1119 |
sprintf(msgbuf, "preemption imbalance "); |
4a2b4b222 sched: Introduce ... |
1120 |
preempt_count_set(count); |
1da177e4c Linux-2.6.12-rc2 |
1121 |
} |
e0df154f4 Split up 'do_init... |
1122 |
if (irqs_disabled()) { |
a76bfd0da initcalls: Fix m6... |
1123 |
strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf)); |
e0df154f4 Split up 'do_init... |
1124 1125 |
local_irq_enable(); } |
d75f773c8 treewide: Switch ... |
1126 1127 |
WARN(msgbuf[0], "initcall %pS returned with %s ", fn, msgbuf); |
59f9415ff modules: extend i... |
1128 |
|
38addce8b gcc-plugins: Add ... |
1129 |
add_latent_entropy(); |
30dbb20e6 tracing: Remove b... |
1130 |
return ret; |
e0df154f4 Split up 'do_init... |
1131 |
} |
1b1eeca7e init: allow initc... |
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 |
extern initcall_entry_t __initcall_start[]; extern initcall_entry_t __initcall0_start[]; extern initcall_entry_t __initcall1_start[]; extern initcall_entry_t __initcall2_start[]; extern initcall_entry_t __initcall3_start[]; extern initcall_entry_t __initcall4_start[]; extern initcall_entry_t __initcall5_start[]; extern initcall_entry_t __initcall6_start[]; extern initcall_entry_t __initcall7_start[]; extern initcall_entry_t __initcall_end[]; static initcall_entry_t *initcall_levels[] __initdata = { |
026cee008 params: <level>_i... |
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 |
__initcall0_start, __initcall1_start, __initcall2_start, __initcall3_start, __initcall4_start, __initcall5_start, __initcall6_start, __initcall7_start, __initcall_end, }; |
96263d286 init: add comment... |
1154 |
/* Keep these in sync with initcalls in include/linux/init.h */ |
7c8f71935 init/main.c: make... |
1155 |
static const char *initcall_level_names[] __initdata = { |
a6fb6012e init: Fix initcal... |
1156 |
"pure", |
9fb48c744 params: add 3rd a... |
1157 1158 1159 1160 1161 1162 1163 |
"core", "postcore", "arch", "subsys", "fs", "device", "late", |
026cee008 params: <level>_i... |
1164 |
}; |
7e2762e1d init/main.c: remo... |
1165 1166 1167 1168 1169 |
static int __init ignore_unknown_bootoption(char *param, char *val, const char *unused, void *arg) { return 0; } |
0068c92a9 init/main.c: Allo... |
1170 |
static void __init do_initcall_level(int level, char *command_line) |
e0df154f4 Split up 'do_init... |
1171 |
{ |
1b1eeca7e init: allow initc... |
1172 |
initcall_entry_t *fn; |
e0df154f4 Split up 'do_init... |
1173 |
|
026cee008 params: <level>_i... |
1174 |
parse_args(initcall_level_names[level], |
0068c92a9 init/main.c: Allo... |
1175 |
command_line, __start___param, |
026cee008 params: <level>_i... |
1176 1177 |
__stop___param - __start___param, level, level, |
7e2762e1d init/main.c: remo... |
1178 |
NULL, ignore_unknown_bootoption); |
026cee008 params: <level>_i... |
1179 |
|
4ee7c60de init, tracing: Ad... |
1180 |
trace_initcall_level(initcall_level_names[level]); |
026cee008 params: <level>_i... |
1181 |
for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++) |
1b1eeca7e init: allow initc... |
1182 |
do_one_initcall(initcall_from_entry(fn)); |
1da177e4c Linux-2.6.12-rc2 |
1183 |
} |
026cee008 params: <level>_i... |
1184 1185 1186 |
static void __init do_initcalls(void) { int level; |
0068c92a9 init/main.c: Allo... |
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 |
size_t len = strlen(saved_command_line) + 1; char *command_line; command_line = kzalloc(len, GFP_KERNEL); if (!command_line) panic("%s: Failed to allocate %zu bytes ", __func__, len); for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) { /* Parser modifies command_line, restore it each time */ strcpy(command_line, saved_command_line); do_initcall_level(level, command_line); } |
026cee008 params: <level>_i... |
1200 |
|
0068c92a9 init/main.c: Allo... |
1201 |
kfree(command_line); |
026cee008 params: <level>_i... |
1202 |
} |
1da177e4c Linux-2.6.12-rc2 |
1203 1204 1205 1206 1207 1208 1209 1210 1211 |
/* * 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 ... |
1212 |
cpuset_init_smp(); |
1da177e4c Linux-2.6.12-rc2 |
1213 |
driver_init(); |
b04c3afb2 [PATCH] sysctl: m... |
1214 |
init_irq_proc(); |
b99b87f70 kernel: construct... |
1215 |
do_ctors(); |
d5767c535 bootup: move 'use... |
1216 |
usermodehelper_enable(); |
b0f84374b bootup: move 'use... |
1217 |
do_initcalls(); |
1da177e4c Linux-2.6.12-rc2 |
1218 |
} |
7babe8db9 Full conversion t... |
1219 |
static void __init do_pre_smp_initcalls(void) |
c2147a509 Better interface ... |
1220 |
{ |
1b1eeca7e init: allow initc... |
1221 |
initcall_entry_t *fn; |
c2147a509 Better interface ... |
1222 |
|
4ee7c60de init, tracing: Ad... |
1223 |
trace_initcall_level("early"); |
026cee008 params: <level>_i... |
1224 |
for (fn = __initcall_start; fn < __initcall0_start; fn++) |
1b1eeca7e init: allow initc... |
1225 |
do_one_initcall(initcall_from_entry(fn)); |
c2147a509 Better interface ... |
1226 |
} |
a74fb73c1 infrastructure fo... |
1227 |
static int run_init_process(const char *init_filename) |
1da177e4c Linux-2.6.12-rc2 |
1228 |
{ |
b88c50ac3 init/main.c: log ... |
1229 |
const char *const *p; |
1da177e4c Linux-2.6.12-rc2 |
1230 |
argv_init[0] = init_filename; |
3f5c15d8a init/main.c: log ... |
1231 1232 |
pr_info("Run %s as init process ", init_filename); |
b88c50ac3 init/main.c: log ... |
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 |
pr_debug(" with arguments: "); for (p = argv_init; *p; p++) pr_debug(" %s ", *p); pr_debug(" with environment: "); for (p = envp_init; *p; p++) pr_debug(" %s ", *p); |
c4ad8f98b execve: use 'stru... |
1243 |
return do_execve(getname_kernel(init_filename), |
ae903caae Bury the conditio... |
1244 1245 |
(const char __user *const __user *)argv_init, (const char __user *const __user *)envp_init); |
1da177e4c Linux-2.6.12-rc2 |
1246 |
} |
ba24762bd init: make init f... |
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 |
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... |
1261 |
static noinline void __init kernel_init_freeable(void); |
d6b212380 make sure that we... |
1262 |
|
0f5bf6d0a arch: Rename CONF... |
1263 |
#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) |
39290b389 module: extend 'r... |
1264 |
bool rodata_enabled __ro_after_init = true; |
d2aa1acad mm/init: Add 'rod... |
1265 1266 1267 1268 1269 |
static int __init set_debug_rodata(char *str) { return strtobool(str, &rodata_enabled); } __setup("rodata=", set_debug_rodata); |
39290b389 module: extend 'r... |
1270 |
#endif |
d2aa1acad mm/init: Add 'rod... |
1271 |
|
0f5bf6d0a arch: Rename CONF... |
1272 |
#ifdef CONFIG_STRICT_KERNEL_RWX |
d2aa1acad mm/init: Add 'rod... |
1273 1274 |
static void mark_readonly(void) { |
2959a5f72 mm: add arch-inde... |
1275 |
if (rodata_enabled) { |
ae646f0b9 init: fix false p... |
1276 |
/* |
ba1803142 main: Replace rcu... |
1277 1278 |
* load_module() results in W+X mappings, which are cleaned * up with call_rcu(). Let's make sure that queued work is |
ae646f0b9 init: fix false p... |
1279 1280 1281 |
* flushed so that we don't hit false positives looking for * insecure pages which are W+X. */ |
ba1803142 main: Replace rcu... |
1282 |
rcu_barrier(); |
d2aa1acad mm/init: Add 'rod... |
1283 |
mark_rodata_ro(); |
2959a5f72 mm: add arch-inde... |
1284 1285 |
rodata_test(); } else |
d2aa1acad mm/init: Add 'rod... |
1286 1287 1288 |
pr_info("Kernel memory protection disabled. "); } |
f596ded1a init/main.c: fix ... |
1289 1290 1291 1292 1293 1294 |
#elif defined(CONFIG_ARCH_HAS_STRICT_KERNEL_RWX) static inline void mark_readonly(void) { pr_warn("Kernel memory protection not selected by kernel config. "); } |
d2aa1acad mm/init: Add 'rod... |
1295 1296 1297 1298 1299 1300 1301 |
#else static inline void mark_readonly(void) { pr_warn("This architecture does not have kernel memory protection. "); } #endif |
997aef68a init: provide a g... |
1302 1303 |
void __weak free_initmem(void) { |
f40399992 init: free_initme... |
1304 |
free_initmem_default(POISON_FREE_INITMEM); |
997aef68a init: provide a g... |
1305 |
} |
d6b212380 make sure that we... |
1306 |
static int __ref kernel_init(void *unused) |
ee5bfa642 [PATCH] generic: ... |
1307 |
{ |
ba24762bd init: make init f... |
1308 |
int ret; |
d6b212380 make sure that we... |
1309 |
kernel_init_freeable(); |
22a9d6456 async: Asynchrono... |
1310 1311 |
/* need to finish all async __init code before freeing the memory */ async_synchronize_full(); |
b80f0f6c9 ftrace: Have init... |
1312 |
ftrace_free_init_mem(); |
ee5bfa642 [PATCH] generic: ... |
1313 |
free_initmem(); |
d2aa1acad mm/init: Add 'rod... |
1314 |
mark_readonly(); |
b976690f5 x86/mm/pti: Intro... |
1315 1316 1317 1318 1319 1320 |
/* * Kernel mappings are now finalized - update the userspace page-table * to finalize PTI. */ pti_finalize(); |
ee5bfa642 [PATCH] generic: ... |
1321 1322 |
system_state = SYSTEM_RUNNING; numa_default_policy(); |
967dcb8fe rcu: Wire up rcu_... |
1323 |
rcu_end_inkernel_boot(); |
ee5bfa642 [PATCH] generic: ... |
1324 |
if (ramdisk_execute_command) { |
ba24762bd init: make init f... |
1325 1326 |
ret = run_init_process(ramdisk_execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
1327 |
return 0; |
ba24762bd init: make init f... |
1328 1329 1330 |
pr_err("Failed to execute %s (error %d) ", ramdisk_execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
1331 1332 1333 1334 1335 1336 1337 1338 1339 |
} /* * 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... |
1340 1341 |
ret = run_init_process(execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
1342 |
return 0; |
6ef4536e2 init: allow CONFI... |
1343 1344 |
panic("Requested init %s failed (error %d).", execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
1345 |
} |
ba24762bd init: make init f... |
1346 1347 1348 1349 |
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... |
1350 |
return 0; |
ee5bfa642 [PATCH] generic: ... |
1351 |
|
ba24762bd init: make init f... |
1352 |
panic("No working init found. Try passing init= option to kernel. " |
8c27ceff3 docs: fix locatio... |
1353 |
"See Linux Documentation/admin-guide/init.rst for guidance."); |
ee5bfa642 [PATCH] generic: ... |
1354 |
} |
b49a733d6 init: unify openi... |
1355 1356 |
void console_on_rootfs(void) { |
74f1a2991 Revert "fs: remov... |
1357 1358 1359 1360 |
/* Open the /dev/console as stdin, this should never fail */ if (ksys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) pr_err("Warning: unable to open an initial console. "); |
b49a733d6 init: unify openi... |
1361 |
|
74f1a2991 Revert "fs: remov... |
1362 1363 1364 |
/* create stdout/stderr */ (void) ksys_dup(0); (void) ksys_dup(0); |
b49a733d6 init: unify openi... |
1365 |
} |
f80b0c904 Ensure that kerne... |
1366 |
static noinline void __init kernel_init_freeable(void) |
1da177e4c Linux-2.6.12-rc2 |
1367 |
{ |
b433c3d45 init, sched: Fix ... |
1368 1369 1370 1371 |
/* * Wait until kthreadd is all set-up. */ wait_for_completion(&kthreadd_done); |
31a67102f Fix blocking allo... |
1372 1373 1374 |
/* Now the scheduler is fully set up and can do blocking allocations */ gfp_allowed_mask = __GFP_BITS_MASK; |
58568d2a8 cpuset,mm: update... |
1375 1376 1377 |
/* * init can allocate pages on any node */ |
3c466d46a init: use N_MEMOR... |
1378 |
set_mems_allowed(node_states[N_MEMORY]); |
1da177e4c Linux-2.6.12-rc2 |
1379 |
|
9ec52099e [PATCH] replace c... |
1380 |
cad_pid = task_pid(current); |
ca74a6f84 x86: optimize loc... |
1381 |
smp_prepare_cpus(setup_max_cpus); |
1da177e4c Linux-2.6.12-rc2 |
1382 |
|
3347fa092 workqueue: make w... |
1383 |
workqueue_init(); |
597b7305d mm: move mm_percp... |
1384 |
init_mm_internals(); |
1da177e4c Linux-2.6.12-rc2 |
1385 |
do_pre_smp_initcalls(); |
004417a6d perf, arch: Clean... |
1386 |
lockup_detector_init(); |
1da177e4c Linux-2.6.12-rc2 |
1387 |
|
1da177e4c Linux-2.6.12-rc2 |
1388 1389 |
smp_init(); sched_init_smp(); |
0e1cc95b4 mm: meminit: fini... |
1390 |
page_alloc_init_late(); |
2f1ee0913 Revert "mm: use e... |
1391 1392 |
/* Initialize page ext after all struct pages are initialized. */ page_ext_init(); |
0e1cc95b4 mm: meminit: fini... |
1393 |
|
1da177e4c Linux-2.6.12-rc2 |
1394 |
do_basic_setup(); |
b49a733d6 init: unify openi... |
1395 |
console_on_rootfs(); |
2bd3a997b init: Open /dev/c... |
1396 |
|
1da177e4c Linux-2.6.12-rc2 |
1397 1398 1399 1400 |
/* * check if there is an early userspace init. If yes, let it do all * the work */ |
ffdfc4097 [PATCH] Add rdini... |
1401 1402 1403 |
if (!ramdisk_execute_command) ramdisk_execute_command = "/init"; |
cbfe20f56 fs: add do_facces... |
1404 1405 |
if (ksys_access((const char __user *) ramdisk_execute_command, 0) != 0) { |
ffdfc4097 [PATCH] Add rdini... |
1406 |
ramdisk_execute_command = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1407 |
prepare_namespace(); |
ffdfc4097 [PATCH] Add rdini... |
1408 |
} |
1da177e4c Linux-2.6.12-rc2 |
1409 1410 1411 1412 1413 |
/* * 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... |
1414 1415 1416 |
* * rootfs is available now, try loading the public keys * and default modules |
1da177e4c Linux-2.6.12-rc2 |
1417 |
*/ |
bb813f4c9 init, block: try ... |
1418 |
|
c9cd2ce2b integrity: provid... |
1419 |
integrity_load_keys(); |
1da177e4c Linux-2.6.12-rc2 |
1420 |
} |