1/*
 2 *  drivers/s390/char/sclp_config.c
 3 *
 4 *    Copyright IBM Corp. 2007
 5 *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
 6 */
 7
 8#define KMSG_COMPONENT "sclp_config"
 9#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
10
11#include <linux/init.h>
12#include <linux/errno.h>
13#include <linux/cpu.h>
14#include <linux/sysdev.h>
15#include <linux/workqueue.h>
16#include <asm/smp.h>
17
18#include "sclp.h"
19
20struct conf_mgm_data {
21	u8 reserved;
22	u8 ev_qualifier;
23} __attribute__((packed));
24
25#define EV_QUAL_CPU_CHANGE	1
26#define EV_QUAL_CAP_CHANGE	3
27
28static struct work_struct sclp_cpu_capability_work;
29static struct work_struct sclp_cpu_change_work;
30
31static void sclp_cpu_capability_notify(struct work_struct *work)
32{
33	int cpu;
34	struct sys_device *sysdev;
35
36	s390_adjust_jiffies();
37	pr_warning("cpu capability changed.\n");
38	get_online_cpus();
39	for_each_online_cpu(cpu) {
40		sysdev = get_cpu_sysdev(cpu);
41		kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
42	}
43	put_online_cpus();
44}
45
46static void __ref sclp_cpu_change_notify(struct work_struct *work)
47{
48	smp_rescan_cpus();
49}
50
51static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
52{
53	struct conf_mgm_data *cdata;
54
55	cdata = (struct conf_mgm_data *)(evbuf + 1);
56	switch (cdata->ev_qualifier) {
57	case EV_QUAL_CPU_CHANGE:
58		schedule_work(&sclp_cpu_change_work);
59		break;
60	case EV_QUAL_CAP_CHANGE:
61		schedule_work(&sclp_cpu_capability_work);
62		break;
63	}
64}
65
66static struct sclp_register sclp_conf_register =
67{
68	.receive_mask = EVTYP_CONFMGMDATA_MASK,
69	.receiver_fn  = sclp_conf_receiver_fn,
70};
71
72static int __init sclp_conf_init(void)
73{
74	INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
75	INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify);
76	return sclp_register(&sclp_conf_register);
77}
78
79__initcall(sclp_conf_init);

 1/*
 
 
 2 *    Copyright IBM Corp. 2007
 3 *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
 4 */
 5
 6#define KMSG_COMPONENT "sclp_config"
 7#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 8
 9#include <linux/init.h>
10#include <linux/errno.h>
11#include <linux/cpu.h>
12#include <linux/device.h>
13#include <linux/workqueue.h>
14#include <asm/smp.h>
15
16#include "sclp.h"
17
18struct conf_mgm_data {
19	u8 reserved;
20	u8 ev_qualifier;
21} __attribute__((packed));
22
23#define EV_QUAL_CPU_CHANGE	1
24#define EV_QUAL_CAP_CHANGE	3
25
26static struct work_struct sclp_cpu_capability_work;
27static struct work_struct sclp_cpu_change_work;
28
29static void sclp_cpu_capability_notify(struct work_struct *work)
30{
31	int cpu;
32	struct device *dev;
33
34	s390_adjust_jiffies();
35	pr_info("CPU capability may have changed\n");
36	get_online_cpus();
37	for_each_online_cpu(cpu) {
38		dev = get_cpu_device(cpu);
39		kobject_uevent(&dev->kobj, KOBJ_CHANGE);
40	}
41	put_online_cpus();
42}
43
44static void __ref sclp_cpu_change_notify(struct work_struct *work)
45{
46	smp_rescan_cpus();
47}
48
49static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
50{
51	struct conf_mgm_data *cdata;
52
53	cdata = (struct conf_mgm_data *)(evbuf + 1);
54	switch (cdata->ev_qualifier) {
55	case EV_QUAL_CPU_CHANGE:
56		schedule_work(&sclp_cpu_change_work);
57		break;
58	case EV_QUAL_CAP_CHANGE:
59		schedule_work(&sclp_cpu_capability_work);
60		break;
61	}
62}
63
64static struct sclp_register sclp_conf_register =
65{
66	.receive_mask = EVTYP_CONFMGMDATA_MASK,
67	.receiver_fn  = sclp_conf_receiver_fn,
68};
69
70static int __init sclp_conf_init(void)
71{
72	INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
73	INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify);
74	return sclp_register(&sclp_conf_register);
75}
76
77__initcall(sclp_conf_init);