diff options
Diffstat (limited to 'target/linux/patches')
| -rw-r--r-- | target/linux/patches/5.4.69/startup.patch | 1254 |
1 files changed, 1249 insertions, 5 deletions
diff --git a/target/linux/patches/5.4.69/startup.patch b/target/linux/patches/5.4.69/startup.patch index 7c6c5661a..e2f2ae65a 100644 --- a/target/linux/patches/5.4.69/startup.patch +++ b/target/linux/patches/5.4.69/startup.patch @@ -1,7 +1,20 @@ -diff -Nur linux-5.4.53.orig/init/main.c linux-5.4.53/init/main.c ---- linux-5.4.53.orig/init/main.c 2020-07-22 09:33:18.000000000 +0200 -+++ linux-5.4.53/init/main.c 2020-07-28 17:33:28.000000000 +0200 -@@ -1196,6 +1196,8 @@ +diff -Nur linux-5.4.69.orig/init/initramfs.c linux-5.4.69/init/initramfs.c +--- linux-5.4.69.orig/init/initramfs.c 2020-10-01 13:19:27.000000000 +0200 ++++ linux-5.4.69/init/initramfs.c 2020-10-31 02:34:40.814412219 +0100 +@@ -674,6 +674,9 @@ + initrd_start = 0; + initrd_end = 0; + ++#ifdef CONFIG_DEVTMPFS_MOUNT ++ devtmpfs_mount("dev"); ++#endif + flush_delayed_fput(); + return 0; + } +diff -Nur linux-5.4.69.orig/init/main.c linux-5.4.69/init/main.c +--- linux-5.4.69.orig/init/main.c 2020-10-01 13:19:27.000000000 +0200 ++++ linux-5.4.69/init/main.c 2020-10-31 02:32:35.699678836 +0100 +@@ -1198,6 +1198,8 @@ if (ksys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) pr_err("Warning: unable to open an initial console.\n"); @@ -10,7 +23,7 @@ diff -Nur linux-5.4.53.orig/init/main.c linux-5.4.53/init/main.c (void) ksys_dup(0); (void) ksys_dup(0); /* -@@ -1204,7 +1206,7 @@ +@@ -1206,7 +1208,7 @@ */ if (!ramdisk_execute_command) @@ -19,3 +32,1234 @@ diff -Nur linux-5.4.53.orig/init/main.c linux-5.4.53/init/main.c if (ksys_access((const char __user *) ramdisk_execute_command, 0) != 0) { +diff -Nur linux-5.4.69.orig/init/main.c.orig linux-5.4.69/init/main.c.orig +--- linux-5.4.69.orig/init/main.c.orig 1970-01-01 01:00:00.000000000 +0100 ++++ linux-5.4.69/init/main.c.orig 2020-10-01 13:19:27.000000000 +0200 +@@ -0,0 +1,1227 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * 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 ++ * Simplified starting of init: Michael A. Griffith <grif@acm.org> ++ */ ++ ++#define DEBUG /* Enable initcall_debug */ ++ ++#include <linux/types.h> ++#include <linux/extable.h> ++#include <linux/module.h> ++#include <linux/proc_fs.h> ++#include <linux/binfmts.h> ++#include <linux/kernel.h> ++#include <linux/syscalls.h> ++#include <linux/stackprotector.h> ++#include <linux/string.h> ++#include <linux/ctype.h> ++#include <linux/delay.h> ++#include <linux/ioport.h> ++#include <linux/init.h> ++#include <linux/initrd.h> ++#include <linux/memblock.h> ++#include <linux/acpi.h> ++#include <linux/console.h> ++#include <linux/nmi.h> ++#include <linux/percpu.h> ++#include <linux/kmod.h> ++#include <linux/kprobes.h> ++#include <linux/vmalloc.h> ++#include <linux/kernel_stat.h> ++#include <linux/start_kernel.h> ++#include <linux/security.h> ++#include <linux/smp.h> ++#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> ++#include <linux/cgroup.h> ++#include <linux/efi.h> ++#include <linux/tick.h> ++#include <linux/sched/isolation.h> ++#include <linux/interrupt.h> ++#include <linux/taskstats_kern.h> ++#include <linux/delayacct.h> ++#include <linux/unistd.h> ++#include <linux/utsname.h> ++#include <linux/rmap.h> ++#include <linux/mempolicy.h> ++#include <linux/key.h> ++#include <linux/buffer_head.h> ++#include <linux/page_ext.h> ++#include <linux/debug_locks.h> ++#include <linux/debugobjects.h> ++#include <linux/lockdep.h> ++#include <linux/kmemleak.h> ++#include <linux/pid_namespace.h> ++#include <linux/device.h> ++#include <linux/kthread.h> ++#include <linux/sched.h> ++#include <linux/sched/init.h> ++#include <linux/signal.h> ++#include <linux/idr.h> ++#include <linux/kgdb.h> ++#include <linux/ftrace.h> ++#include <linux/async.h> ++#include <linux/sfi.h> ++#include <linux/shmem_fs.h> ++#include <linux/slab.h> ++#include <linux/perf_event.h> ++#include <linux/ptrace.h> ++#include <linux/pti.h> ++#include <linux/blkdev.h> ++#include <linux/elevator.h> ++#include <linux/sched/clock.h> ++#include <linux/sched/task.h> ++#include <linux/sched/task_stack.h> ++#include <linux/context_tracking.h> ++#include <linux/random.h> ++#include <linux/list.h> ++#include <linux/integrity.h> ++#include <linux/proc_ns.h> ++#include <linux/io.h> ++#include <linux/cache.h> ++#include <linux/rodata_test.h> ++#include <linux/jump_label.h> ++#include <linux/mem_encrypt.h> ++ ++#include <asm/io.h> ++#include <asm/bugs.h> ++#include <asm/setup.h> ++#include <asm/sections.h> ++#include <asm/cacheflush.h> ++ ++#define CREATE_TRACE_POINTS ++#include <trace/events/initcall.h> ++ ++static int kernel_init(void *); ++ ++extern void init_IRQ(void); ++extern void radix_tree_init(void); ++ ++/* ++ * 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; ++ ++enum system_states system_state __read_mostly; ++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. */ ++void (*__initdata late_time_init)(void); ++ ++/* 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; ++/* Command line for per-initcall parameter parsing */ ++static char *initcall_command_line; ++ ++static char *execute_command; ++static char *ramdisk_execute_command; ++ ++/* ++ * Used to generate warnings if static_key manipulation functions are used ++ * before jump_label_init is called. ++ */ ++bool static_key_initialized __read_mostly; ++EXPORT_SYMBOL_GPL(static_key_initialized); ++ ++/* ++ * 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. ++ * For ex. kdump situation where previous kernel has crashed, BIOS has been ++ * skipped and devices will be in unknown state. ++ */ ++unsigned int reset_devices; ++EXPORT_SYMBOL(reset_devices); ++ ++static int __init set_reset_devices(char *str) ++{ ++ reset_devices = 1; ++ return 1; ++} ++ ++__setup("reset_devices", set_reset_devices); ++ ++static const char *argv_init[MAX_INIT_ARGS+2] = { "init", NULL, }; ++const char *envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, }; ++static const char *panic_later, *panic_param; ++ ++extern const struct obs_kernel_param __setup_start[], __setup_end[]; ++ ++static bool __init obsolete_checksetup(char *line) ++{ ++ const struct obs_kernel_param *p; ++ bool had_early_param = false; ++ ++ p = __setup_start; ++ do { ++ int n = strlen(p->str); ++ if (parameqn(line, p->str, n)) { ++ if (p->early) { ++ /* 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( */ ++ if (line[n] == '\0' || line[n] == '=') ++ had_early_param = true; ++ } else if (!p->setup_func) { ++ pr_warn("Parameter %s is obsolete, ignored\n", ++ p->str); ++ return true; ++ } else if (p->setup_func(line + n)) ++ return true; ++ } ++ p++; ++ } while (p < __setup_end); ++ ++ return had_early_param; ++} ++ ++/* ++ * 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); ++EXPORT_SYMBOL(loops_per_jiffy); ++ ++static int __init debug_kernel(char *str) ++{ ++ console_loglevel = CONSOLE_LOGLEVEL_DEBUG; ++ return 0; ++} ++ ++static int __init quiet_kernel(char *str) ++{ ++ console_loglevel = CONSOLE_LOGLEVEL_QUIET; ++ return 0; ++} ++ ++early_param("debug", debug_kernel); ++early_param("quiet", quiet_kernel); ++ ++static int __init loglevel(char *str) ++{ ++ 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; ++} ++ ++early_param("loglevel", loglevel); ++ ++/* Change NUL term back to "=", to make "param" the whole string. */ ++static int __init repair_env_string(char *param, char *val, ++ const char *unused, void *arg) ++{ ++ 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(); ++ } ++ return 0; ++} ++ ++/* Anything after -- gets handed straight to init. */ ++static int __init set_init_arg(char *param, char *val, ++ const char *unused, void *arg) ++{ ++ unsigned int i; ++ ++ if (panic_later) ++ return 0; ++ ++ repair_env_string(param, val, unused, NULL); ++ ++ 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; ++} ++ ++/* ++ * Unknown boot options get handed to init, unless they look like ++ * unused parameters (modprobe will find them in /proc/cmdline). ++ */ ++static int __init unknown_bootoption(char *param, char *val, ++ const char *unused, void *arg) ++{ ++ repair_env_string(param, val, unused, NULL); ++ ++ /* Handle obsolete-style parameters */ ++ if (obsolete_checksetup(param)) ++ return 0; ++ ++ /* Unused module parameter. */ ++ if (strchr(param, '.') && (!val || strchr(param, '.') < val)) ++ return 0; ++ ++ if (panic_later) ++ return 0; ++ ++ if (val) { ++ /* Environment option */ ++ unsigned int i; ++ for (i = 0; envp_init[i]; i++) { ++ if (i == MAX_INIT_ENVS) { ++ panic_later = "env"; ++ 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) { ++ panic_later = "init"; ++ 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); ++ ++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); ++ ++#ifndef CONFIG_SMP ++static const unsigned int setup_max_cpus = NR_CPUS; ++static inline void setup_nr_cpu_ids(void) { } ++static inline void smp_prepare_cpus(unsigned int maxcpus) { } ++#endif ++ ++/* ++ * 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) ++{ ++ size_t len = strlen(boot_command_line) + 1; ++ ++ saved_command_line = memblock_alloc(len, SMP_CACHE_BYTES); ++ if (!saved_command_line) ++ panic("%s: Failed to allocate %zu bytes\n", __func__, len); ++ ++ initcall_command_line = memblock_alloc(len, SMP_CACHE_BYTES); ++ if (!initcall_command_line) ++ panic("%s: Failed to allocate %zu bytes\n", __func__, len); ++ ++ static_command_line = memblock_alloc(len, SMP_CACHE_BYTES); ++ if (!static_command_line) ++ panic("%s: Failed to allocate %zu bytes\n", __func__, len); ++ ++ strcpy(saved_command_line, boot_command_line); ++ strcpy(static_command_line, command_line); ++} ++ ++/* ++ * 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. ++ */ ++ ++static __initdata DECLARE_COMPLETION(kthreadd_done); ++ ++noinline void __ref rest_init(void) ++{ ++ struct task_struct *tsk; ++ int pid; ++ ++ rcu_scheduler_starting(); ++ /* ++ * We need to spawn init first so that it obtains pid 1, however ++ * the init task will end up wanting to create kthreads, which, if ++ * we schedule it before we create kthreadd, will OOPS. ++ */ ++ 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(); ++ ++ numa_default_policy(); ++ pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES); ++ rcu_read_lock(); ++ kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns); ++ rcu_read_unlock(); ++ ++ /* ++ * Enable might_sleep() and smp_processor_id() checks. ++ * They cannot be enabled earlier because with CONFIG_PREEMPTION=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; ++ ++ complete(&kthreadd_done); ++ ++ /* ++ * The boot idle thread must execute schedule() ++ * at least once to get things moving: ++ */ ++ schedule_preempt_disabled(); ++ /* Call into cpu_idle with preempt disabled */ ++ cpu_startup_entry(CPUHP_ONLINE); ++} ++ ++/* Check for early params. */ ++static int __init do_early_param(char *param, char *val, ++ const char *unused, void *arg) ++{ ++ const struct obs_kernel_param *p; ++ ++ for (p = __setup_start; p < __setup_end; p++) { ++ if ((p->early && parameq(param, p->str)) || ++ (strcmp(param, "console") == 0 && ++ strcmp(p->str, "earlycon") == 0) ++ ) { ++ if (p->setup_func(val) != 0) ++ pr_warn("Malformed early option '%s'\n", param); ++ } ++ } ++ /* We accept everything at this stage. */ ++ return 0; ++} ++ ++void __init parse_early_options(char *cmdline) ++{ ++ parse_args("early options", cmdline, NULL, 0, 0, 0, NULL, ++ do_early_param); ++} ++ ++/* Arch code calls this early on, or if not, just before other parsing. */ ++void __init parse_early_param(void) ++{ ++ static int done __initdata; ++ static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; ++ ++ if (done) ++ return; ++ ++ /* All fall through to do_early_param. */ ++ strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); ++ parse_early_options(tmp_cmdline); ++ done = 1; ++} ++ ++void __init __weak arch_post_acpi_subsys_init(void) { } ++ ++void __init __weak smp_setup_processor_id(void) ++{ ++} ++ ++# if THREAD_SIZE >= PAGE_SIZE ++void __init __weak thread_stack_cache_init(void) ++{ ++} ++#endif ++ ++void __init __weak mem_encrypt_init(void) { } ++ ++void __init __weak poking_init(void) { } ++ ++void __init __weak pgtable_cache_init(void) { } ++ ++bool initcall_debug; ++core_param(initcall_debug, initcall_debug, bool, 0644); ++ ++#ifdef TRACEPOINTS_ENABLED ++static void __init initcall_debug_enable(void); ++#else ++static inline void initcall_debug_enable(void) ++{ ++} ++#endif ++ ++/* 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\n", ++ 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...\n"); ++} ++ ++/* ++ * Set up kernel memory allocators ++ */ ++static void __init mm_init(void) ++{ ++ /* ++ * page_ext requires contiguous pages, ++ * bigger than MAX_ORDER unless SPARSEMEM. ++ */ ++ page_ext_init_flatmem(); ++ init_debug_pagealloc(); ++ report_meminit(); ++ mem_init(); ++ kmem_cache_init(); ++ kmemleak_init(); ++ pgtable_init(); ++ debug_objects_mem_init(); ++ vmalloc_init(); ++ ioremap_huge_init(); ++ /* Should be run before the first non-init thread is created */ ++ init_espfix_bsp(); ++ /* Should be run after espfix64 is set up. */ ++ pti_init(); ++} ++ ++void __init __weak arch_call_rest_init(void) ++{ ++ rest_init(); ++} ++ ++asmlinkage __visible void __init start_kernel(void) ++{ ++ char *command_line; ++ char *after_dashes; ++ ++ set_task_stack_end_magic(&init_task); ++ smp_setup_processor_id(); ++ debug_objects_early_init(); ++ ++ cgroup_init_early(); ++ ++ local_irq_disable(); ++ early_boot_irqs_disabled = true; ++ ++ /* ++ * Interrupts are still disabled. Do necessary setups, then ++ * enable them. ++ */ ++ boot_cpu_init(); ++ page_address_init(); ++ pr_notice("%s", linux_banner); ++ early_security_init(); ++ setup_arch(&command_line); ++ setup_command_line(command_line); ++ setup_nr_cpu_ids(); ++ setup_per_cpu_areas(); ++ smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ ++ boot_cpu_hotplug_init(); ++ ++ build_all_zonelists(NULL); ++ page_alloc_init(); ++ ++ pr_notice("Kernel command line: %s\n", boot_command_line); ++ /* parameters may set static keys */ ++ jump_label_init(); ++ parse_early_param(); ++ after_dashes = parse_args("Booting kernel", ++ static_command_line, __start___param, ++ __stop___param - __start___param, ++ -1, -1, NULL, &unknown_bootoption); ++ if (!IS_ERR_OR_NULL(after_dashes)) ++ parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, ++ NULL, set_init_arg); ++ ++ /* ++ * These use large bootmem allocations and must precede ++ * kmem_cache_init() ++ */ ++ setup_log_buf(0); ++ vfs_caches_init_early(); ++ sort_main_extable(); ++ trap_init(); ++ mm_init(); ++ ++ ftrace_init(); ++ ++ /* trace_printk can be enabled here */ ++ early_trace_init(); ++ ++ /* ++ * 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(); ++ if (WARN(!irqs_disabled(), ++ "Interrupts were enabled *very* early, fixing it\n")) ++ local_irq_disable(); ++ radix_tree_init(); ++ ++ /* ++ * Set up housekeeping before setting up workqueues to allow the unbound ++ * workqueue to take non-housekeeping into account. ++ */ ++ housekeeping_init(); ++ ++ /* ++ * Allow workqueue creation and work item queueing/cancelling ++ * early. Work item execution depends on kthreads and starts after ++ * workqueue_init(). ++ */ ++ workqueue_init_early(); ++ ++ rcu_init(); ++ ++ /* Trace events are available after this */ ++ trace_init(); ++ ++ if (initcall_debug) ++ initcall_debug_enable(); ++ ++ context_tracking_init(); ++ /* init some links before init_ISA_irqs() */ ++ early_irq_init(); ++ init_IRQ(); ++ tick_init(); ++ rcu_init_nohz(); ++ init_timers(); ++ hrtimers_init(); ++ softirq_init(); ++ timekeeping_init(); ++ ++ /* ++ * 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(); ++ ++ time_init(); ++ perf_event_init(); ++ profile_init(); ++ call_function_init(); ++ WARN(!irqs_disabled(), "Interrupts were enabled early\n"); ++ ++ early_boot_irqs_disabled = false; ++ local_irq_enable(); ++ ++ kmem_cache_init_late(); ++ ++ /* ++ * 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) ++ panic("Too many boot %s vars at `%s'", panic_later, ++ panic_param); ++ ++ lockdep_init(); ++ ++ /* ++ * 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(); ++ ++ /* ++ * 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(); ++ ++#ifdef CONFIG_BLK_DEV_INITRD ++ if (initrd_start && !initrd_below_start_ok && ++ page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) { ++ pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it.\n", ++ page_to_pfn(virt_to_page((void *)initrd_start)), ++ min_low_pfn); ++ initrd_start = 0; ++ } ++#endif ++ setup_per_cpu_pageset(); ++ numa_policy_init(); ++ acpi_early_init(); ++ if (late_time_init) ++ late_time_init(); ++ sched_clock_init(); ++ calibrate_delay(); ++ pid_idr_init(); ++ anon_vma_init(); ++#ifdef CONFIG_X86 ++ if (efi_enabled(EFI_RUNTIME_SERVICES)) ++ efi_enter_virtual_mode(); ++#endif ++ thread_stack_cache_init(); ++ cred_init(); ++ fork_init(); ++ proc_caches_init(); ++ uts_ns_init(); ++ buffer_init(); ++ key_init(); ++ security_init(); ++ dbg_late_init(); ++ vfs_caches_init(); ++ pagecache_init(); ++ signals_init(); ++ seq_file_init(); ++ proc_root_init(); ++ nsfs_init(); ++ cpuset_init(); ++ cgroup_init(); ++ taskstats_init_early(); ++ delayacct_init(); ++ ++ poking_init(); ++ check_bugs(); ++ ++ acpi_subsystem_init(); ++ arch_post_acpi_subsys_init(); ++ sfi_init_late(); ++ ++ /* Do the rest non-__init'ed, we're now alive */ ++ arch_call_rest_init(); ++ ++ prevent_tail_call_optimization(); ++} ++ ++/* Call all constructor functions linked into the kernel. */ ++static void __init do_ctors(void) ++{ ++#ifdef CONFIG_CONSTRUCTORS ++ ctor_fn_t *fn = (ctor_fn_t *) __ctors_start; ++ ++ for (; fn < (ctor_fn_t *) __ctors_end; fn++) ++ (*fn)(); ++#endif ++} ++ ++#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\n", str_entry); ++ entry = memblock_alloc(sizeof(*entry), ++ SMP_CACHE_BYTES); ++ if (!entry) ++ panic("%s: Failed to allocate %zu bytes\n", ++ __func__, sizeof(*entry)); ++ entry->buf = memblock_alloc(strlen(str_entry) + 1, ++ SMP_CACHE_BYTES); ++ if (!entry->buf) ++ panic("%s: Failed to allocate %zu bytes\n", ++ __func__, 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) ++{ ++ struct blacklist_entry *entry; ++ char fn_name[KSYM_SYMBOL_LEN]; ++ unsigned long addr; ++ ++ if (list_empty(&blacklisted_initcalls)) ++ return false; ++ ++ addr = (unsigned long) dereference_function_descriptor(fn); ++ sprint_symbol_no_offset(fn_name, addr); ++ ++ /* ++ * 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'); ++ ++ list_for_each_entry(entry, &blacklisted_initcalls, next) { ++ if (!strcmp(fn_name, entry->buf)) { ++ pr_debug("initcall %s blacklisted\n", fn_name); ++ return true; ++ } ++ } ++ ++ return false; ++} ++#else ++static int __init initcall_blacklist(char *str) ++{ ++ pr_warn("initcall_blacklist requires CONFIG_KALLSYMS\n"); ++ return 0; ++} ++ ++static bool __init_or_module initcall_blacklisted(initcall_t fn) ++{ ++ return false; ++} ++#endif ++__setup("initcall_blacklist=", initcall_blacklist); ++ ++static __init_or_module void ++trace_initcall_start_cb(void *data, initcall_t fn) ++{ ++ ktime_t *calltime = (ktime_t *)data; ++ ++ printk(KERN_DEBUG "calling %pS @ %i\n", fn, task_pid_nr(current)); ++ *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; ++ ++ rettime = ktime_get(); ++ delta = ktime_sub(rettime, *calltime); ++ duration = (unsigned long long) ktime_to_ns(delta) >> 10; ++ printk(KERN_DEBUG "initcall %pS returned %d after %lld usecs\n", ++ fn, ret, duration); ++} ++ ++static ktime_t initcall_calltime; ++ ++#ifdef TRACEPOINTS_ENABLED ++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\n"); ++} ++# 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 */ ++ ++int __init_or_module do_one_initcall(initcall_t fn) ++{ ++ int count = preempt_count(); ++ char msgbuf[64]; ++ int ret; ++ ++ if (initcall_blacklisted(fn)) ++ return -EPERM; ++ ++ do_trace_initcall_start(fn); ++ ret = fn(); ++ do_trace_initcall_finish(fn, ret); ++ ++ msgbuf[0] = 0; ++ ++ if (preempt_count() != count) { ++ sprintf(msgbuf, "preemption imbalance "); ++ preempt_count_set(count); ++ } ++ if (irqs_disabled()) { ++ strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf)); ++ local_irq_enable(); ++ } ++ WARN(msgbuf[0], "initcall %pS returned with %s\n", fn, msgbuf); ++ ++ add_latent_entropy(); ++ return ret; ++} ++ ++ ++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 = { ++ __initcall0_start, ++ __initcall1_start, ++ __initcall2_start, ++ __initcall3_start, ++ __initcall4_start, ++ __initcall5_start, ++ __initcall6_start, ++ __initcall7_start, ++ __initcall_end, ++}; ++ ++/* Keep these in sync with initcalls in include/linux/init.h */ ++static const char *initcall_level_names[] __initdata = { ++ "pure", ++ "core", ++ "postcore", ++ "arch", ++ "subsys", ++ "fs", ++ "device", ++ "late", ++}; ++ ++static void __init do_initcall_level(int level) ++{ ++ initcall_entry_t *fn; ++ ++ strcpy(initcall_command_line, saved_command_line); ++ parse_args(initcall_level_names[level], ++ initcall_command_line, __start___param, ++ __stop___param - __start___param, ++ level, level, ++ NULL, &repair_env_string); ++ ++ trace_initcall_level(initcall_level_names[level]); ++ for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++) ++ do_one_initcall(initcall_from_entry(fn)); ++} ++ ++static void __init do_initcalls(void) ++{ ++ int level; ++ ++ for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) ++ do_initcall_level(level); ++} ++ ++/* ++ * 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) ++{ ++ cpuset_init_smp(); ++ driver_init(); ++ init_irq_proc(); ++ do_ctors(); ++ usermodehelper_enable(); ++ do_initcalls(); ++} ++ ++static void __init do_pre_smp_initcalls(void) ++{ ++ initcall_entry_t *fn; ++ ++ trace_initcall_level("early"); ++ for (fn = __initcall_start; fn < __initcall0_start; fn++) ++ do_one_initcall(initcall_from_entry(fn)); ++} ++ ++static int run_init_process(const char *init_filename) ++{ ++ argv_init[0] = init_filename; ++ pr_info("Run %s as init process\n", init_filename); ++ return do_execve(getname_kernel(init_filename), ++ (const char __user *const __user *)argv_init, ++ (const char __user *const __user *)envp_init); ++} ++ ++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)\n", ++ init_filename, ret); ++ } ++ ++ return ret; ++} ++ ++static noinline void __init kernel_init_freeable(void); ++ ++#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) ++bool rodata_enabled __ro_after_init = true; ++static int __init set_debug_rodata(char *str) ++{ ++ return strtobool(str, &rodata_enabled); ++} ++__setup("rodata=", set_debug_rodata); ++#endif ++ ++#ifdef CONFIG_STRICT_KERNEL_RWX ++static void mark_readonly(void) ++{ ++ if (rodata_enabled) { ++ /* ++ * load_module() results in W+X mappings, which are cleaned ++ * up with call_rcu(). 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(); ++ mark_rodata_ro(); ++ rodata_test(); ++ } else ++ pr_info("Kernel memory protection disabled.\n"); ++} ++#else ++static inline void mark_readonly(void) ++{ ++ pr_warn("This architecture does not have kernel memory protection.\n"); ++} ++#endif ++ ++void __weak free_initmem(void) ++{ ++ free_initmem_default(POISON_FREE_INITMEM); ++} ++ ++static int __ref kernel_init(void *unused) ++{ ++ int ret; ++ ++ kernel_init_freeable(); ++ /* need to finish all async __init code before freeing the memory */ ++ async_synchronize_full(); ++ kprobe_free_init_mem(); ++ ftrace_free_init_mem(); ++ free_initmem(); ++ mark_readonly(); ++ ++ /* ++ * Kernel mappings are now finalized - update the userspace page-table ++ * to finalize PTI. ++ */ ++ pti_finalize(); ++ ++ system_state = SYSTEM_RUNNING; ++ numa_default_policy(); ++ ++ rcu_end_inkernel_boot(); ++ ++ if (ramdisk_execute_command) { ++ ret = run_init_process(ramdisk_execute_command); ++ if (!ret) ++ return 0; ++ pr_err("Failed to execute %s (error %d)\n", ++ ramdisk_execute_command, ret); ++ } ++ ++ /* ++ * 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) { ++ ret = run_init_process(execute_command); ++ if (!ret) ++ return 0; ++ panic("Requested init %s failed (error %d).", ++ execute_command, ret); ++ } ++ 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")) ++ return 0; ++ ++ panic("No working init found. Try passing init= option to kernel. " ++ "See Linux Documentation/admin-guide/init.rst for guidance."); ++} ++ ++static noinline void __init kernel_init_freeable(void) ++{ ++ /* ++ * Wait until kthreadd is all set-up. ++ */ ++ wait_for_completion(&kthreadd_done); ++ ++ /* Now the scheduler is fully set up and can do blocking allocations */ ++ gfp_allowed_mask = __GFP_BITS_MASK; ++ ++ /* ++ * init can allocate pages on any node ++ */ ++ set_mems_allowed(node_states[N_MEMORY]); ++ ++ cad_pid = task_pid(current); ++ ++ smp_prepare_cpus(setup_max_cpus); ++ ++ workqueue_init(); ++ ++ init_mm_internals(); ++ ++ do_pre_smp_initcalls(); ++ lockup_detector_init(); ++ ++ smp_init(); ++ sched_init_smp(); ++ ++ page_alloc_init_late(); ++ /* Initialize page ext after all struct pages are initialized. */ ++ page_ext_init(); ++ ++ do_basic_setup(); ++ ++ /* Open the /dev/console on the rootfs, 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.\n"); ++ ++ (void) ksys_dup(0); ++ (void) ksys_dup(0); ++ /* ++ * check if there is an early userspace init. If yes, let it do all ++ * the work ++ */ ++ ++ if (!ramdisk_execute_command) ++ ramdisk_execute_command = "/init"; ++ ++ if (ksys_access((const char __user *) ++ ramdisk_execute_command, 0) != 0) { ++ ramdisk_execute_command = NULL; ++ prepare_namespace(); ++ } ++ ++ /* ++ * 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.. ++ * ++ * rootfs is available now, try loading the public keys ++ * and default modules ++ */ ++ ++ integrity_load_keys(); ++} |