1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 4 */ 5 6 #include <linux/sched/signal.h> 7 #include <linux/sched/task.h> 8 #include <linux/sched/mm.h> 9 #include <linux/spinlock.h> 10 #include <linux/slab.h> 11 #include <linux/oom.h> 12 #include <linux/reboot.h> 13 #include <kern_util.h> 14 #include <os.h> 15 #include <skas.h> 16 17 void (*pm_power_off)(void); 18 EXPORT_SYMBOL(pm_power_off); 19 20 static void kill_off_processes(void) 21 { 22 struct task_struct *p; 23 int pid; 24 25 read_lock(&tasklist_lock); 26 for_each_process(p) { 27 struct task_struct *t; 28 29 t = find_lock_task_mm(p); 30 if (!t) 31 continue; 32 pid = t->mm->context.id.pid; 33 task_unlock(t); 34 os_kill_ptraced_process(pid, 1); 35 } 36 read_unlock(&tasklist_lock); 37 } 38 39 void uml_cleanup(void) 40 { 41 kmalloc_ok = 0; 42 do_uml_exitcalls(); 43 kill_off_processes(); 44 } 45 46 void machine_restart(char * __unused) 47 { 48 uml_cleanup(); 49 reboot_skas(); 50 } 51 52 void machine_power_off(void) 53 { 54 uml_cleanup(); 55 halt_skas(); 56 } 57 58 void machine_halt(void) 59 { 60 machine_power_off(); 61 } 62 63 static int sys_power_off_handler(struct sys_off_data *data) 64 { 65 machine_power_off(); 66 return 0; 67 } 68 69 static int register_power_off(void) 70 { 71 register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, 72 SYS_OFF_PRIO_DEFAULT, 73 sys_power_off_handler, NULL); 74 return 0; 75 } 76 __initcall(register_power_off); 77