projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2fc2d1e9 HC |
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 | ||
| b3ff088b MS |
8 | #define KMSG_COMPONENT "sclp_config" |
| 9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
| 10 | ||
| 2fc2d1e9 HC |
11 | #include <linux/init.h> |
| 12 | #include <linux/errno.h> | |
| 13 | #include <linux/cpu.h> | |
| 8a25a2fd | 14 | #include <linux/device.h> |
| 2fc2d1e9 | 15 | #include <linux/workqueue.h> |
| 1e489518 | 16 | #include <asm/smp.h> |
| 2fc2d1e9 | 17 | |
| b3ff088b | 18 | #include "sclp.h" |
| 2fc2d1e9 HC |
19 | |
| 20 | struct conf_mgm_data { | |
| 21 | u8 reserved; | |
| 22 | u8 ev_qualifier; | |
| 23 | } __attribute__((packed)); | |
| 24 | ||
| 1e489518 | 25 | #define EV_QUAL_CPU_CHANGE 1 |
| 2fc2d1e9 HC |
26 | #define EV_QUAL_CAP_CHANGE 3 |
| 27 | ||
| 28 | static struct work_struct sclp_cpu_capability_work; | |
| 1e489518 | 29 | static struct work_struct sclp_cpu_change_work; |
| 2fc2d1e9 HC |
30 | |
| 31 | static void sclp_cpu_capability_notify(struct work_struct *work) | |
| 32 | { | |
| 33 | int cpu; | |
| 8a25a2fd | 34 | struct device *dev; |
| 2fc2d1e9 | 35 | |
| 8e102301 | 36 | s390_adjust_jiffies(); |
| b3ff088b | 37 | pr_warning("cpu capability changed.\n"); |
| 86ef5c9a | 38 | get_online_cpus(); |
| 2fc2d1e9 | 39 | for_each_online_cpu(cpu) { |
| 8a25a2fd KS |
40 | dev = get_cpu_device(cpu); |
| 41 | kobject_uevent(&dev->kobj, KOBJ_CHANGE); | |
| 2fc2d1e9 | 42 | } |
| 86ef5c9a | 43 | put_online_cpus(); |
| 2fc2d1e9 HC |
44 | } |
| 45 | ||
| b9732ca1 HC |
46 | static void __ref sclp_cpu_change_notify(struct work_struct *work) |
| 47 | { | |
| fc7e1e4b | 48 | smp_rescan_cpus(); |
| 1e489518 HC |
49 | } |
| 50 | ||
| 2fc2d1e9 HC |
51 | static 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); | |
| 1e489518 HC |
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: | |
| 2fc2d1e9 | 61 | schedule_work(&sclp_cpu_capability_work); |
| 1e489518 HC |
62 | break; |
| 63 | } | |
| 2fc2d1e9 HC |
64 | } |
| 65 | ||
| 66 | static struct sclp_register sclp_conf_register = | |
| 67 | { | |
| 68 | .receive_mask = EVTYP_CONFMGMDATA_MASK, | |
| 69 | .receiver_fn = sclp_conf_receiver_fn, | |
| 70 | }; | |
| 71 | ||
| 72 | static int __init sclp_conf_init(void) | |
| 73 | { | |
| 2fc2d1e9 | 74 | INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify); |
| 1e489518 | 75 | INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify); |
| 1b60f68f | 76 | return sclp_register(&sclp_conf_register); |
| 2fc2d1e9 HC |
77 | } |
| 78 | ||
| 79 | __initcall(sclp_conf_init); |