xref: /openbmc/linux/arch/um/kernel/reboot.c (revision 7fe2f639)
1 /*
2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3  * Licensed under the GPL
4  */
5 
6 #include "linux/sched.h"
7 #include "linux/slab.h"
8 #include "kern_util.h"
9 #include "os.h"
10 #include "skas.h"
11 
12 void (*pm_power_off)(void);
13 
14 static void kill_off_processes(void)
15 {
16 	if (proc_mm)
17 		/*
18 		 * FIXME: need to loop over userspace_pids
19 		 */
20 		os_kill_ptraced_process(userspace_pid[0], 1);
21 	else {
22 		struct task_struct *p;
23 		int pid, me;
24 
25 		me = os_getpid();
26 		for_each_process(p) {
27 			if (p->mm == NULL)
28 				continue;
29 
30 			pid = p->mm->context.id.u.pid;
31 			os_kill_ptraced_process(pid, 1);
32 		}
33 	}
34 }
35 
36 void uml_cleanup(void)
37 {
38 	kmalloc_ok = 0;
39 	do_uml_exitcalls();
40 	kill_off_processes();
41 }
42 
43 void machine_restart(char * __unused)
44 {
45 	uml_cleanup();
46 	reboot_skas();
47 }
48 
49 void machine_power_off(void)
50 {
51 	uml_cleanup();
52 	halt_skas();
53 }
54 
55 void machine_halt(void)
56 {
57 	machine_power_off();
58 }
59