blob: dcb949dcfa66c1c652597e367fe56fe3790ef66d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright IBM Corp. 2007
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_config"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/cpu.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include <asm/smp.h>
#include "sclp.h"
struct conf_mgm_data {
u8 reserved;
u8 ev_qualifier;
} __attribute__((packed));
#define EV_QUAL_CPU_CHANGE 1
#define EV_QUAL_CAP_CHANGE 3
static struct work_struct sclp_cpu_capability_work;
static struct work_struct sclp_cpu_change_work;
static void sclp_cpu_capability_notify(struct work_struct *work)
{
int cpu;
struct device *dev;
s390_adjust_jiffies();
pr_info("CPU capability may have changed\n");
get_online_cpus();
for_each_online_cpu(cpu) {
dev = get_cpu_device(cpu);
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
}
put_online_cpus();
}
static void __ref sclp_cpu_change_notify(struct work_struct *work)
{
lock_device_hotplug();
smp_rescan_cpus();
unlock_device_hotplug();
}
static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
{
struct conf_mgm_data *cdata;
cdata = (struct conf_mgm_data *)(evbuf + 1);
switch (cdata->ev_qualifier) {
case EV_QUAL_CPU_CHANGE:
schedule_work(&sclp_cpu_change_work);
break;
case EV_QUAL_CAP_CHANGE:
schedule_work(&sclp_cpu_capability_work);
break;
}
}
static struct sclp_register sclp_conf_register =
{
.receive_mask = EVTYP_CONFMGMDATA_MASK,
.receiver_fn = sclp_conf_receiver_fn,
};
static int __init sclp_conf_init(void)
{
INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify);
return sclp_register(&sclp_conf_register);
}
__initcall(sclp_conf_init);
|
