80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
|
|
* drivers/s390/char/sclp_config.c
|
|
*
|
|
* 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/sysdev.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 sys_device *sysdev;
|
|
|
|
s390_adjust_jiffies();
|
|
pr_warning("cpu capability changed.\n");
|
|
get_online_cpus();
|
|
for_each_online_cpu(cpu) {
|
|
sysdev = get_cpu_sysdev(cpu);
|
|
kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
|
|
}
|
|
put_online_cpus();
|
|
}
|
|
|
|
static void __ref sclp_cpu_change_notify(struct work_struct *work)
|
|
{
|
|
smp_rescan_cpus();
|
|
}
|
|
|
|
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);
|