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.u.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
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