projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2fc2d1e9 | 1 | /* |
| 2fc2d1e9 HC |
2 | * Copyright IBM Corp. 2007 |
| 3 | * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> | |
| 4 | */ | |
| 5 | ||
| b3ff088b MS |
6 | #define KMSG_COMPONENT "sclp_config" |
| 7 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
| 8 | ||
| 2fc2d1e9 HC |
9 | #include <linux/init.h> |
| 10 | #include <linux/errno.h> | |
| 11 | #include <linux/cpu.h> | |
| 8a25a2fd | 12 | #include <linux/device.h> |
| 2fc2d1e9 | 13 | #include <linux/workqueue.h> |
| 1e489518 | 14 | #include <asm/smp.h> |
| 2fc2d1e9 | 15 | |
| b3ff088b | 16 | #include "sclp.h" |
| 2fc2d1e9 HC |
17 | |
| 18 | struct conf_mgm_data { | |
| 19 | u8 reserved; | |
| 20 | u8 ev_qualifier; | |
| 21 | } __attribute__((packed)); | |
| 22 | ||
| 1e489518 | 23 | #define EV_QUAL_CPU_CHANGE 1 |
| 2fc2d1e9 HC |
24 | #define EV_QUAL_CAP_CHANGE 3 |
| 25 | ||
| 26 | static struct work_struct sclp_cpu_capability_work; | |
| 1e489518 | 27 | static struct work_struct sclp_cpu_change_work; |
| 2fc2d1e9 HC |
28 | |
| 29 | static void sclp_cpu_capability_notify(struct work_struct *work) | |
| 30 | { | |
| 31 | int cpu; | |
| 8a25a2fd | 32 | struct device *dev; |
| 2fc2d1e9 | 33 | |
| 8e102301 | 34 | s390_adjust_jiffies(); |
| b3ff088b | 35 | pr_warning("cpu capability changed.\n"); |
| 86ef5c9a | 36 | get_online_cpus(); |
| 2fc2d1e9 | 37 | for_each_online_cpu(cpu) { |
| 8a25a2fd KS |
38 | dev = get_cpu_device(cpu); |
| 39 | kobject_uevent(&dev->kobj, KOBJ_CHANGE); | |
| 2fc2d1e9 | 40 | } |
| 86ef5c9a | 41 | put_online_cpus(); |
| 2fc2d1e9 HC |
42 | } |
| 43 | ||
| b9732ca1 HC |
44 | static void __ref sclp_cpu_change_notify(struct work_struct *work) |
| 45 | { | |
| fc7e1e4b | 46 | smp_rescan_cpus(); |
| 1e489518 HC |
47 | } |
| 48 | ||
| 2fc2d1e9 HC |
49 | static 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); | |
| 1e489518 HC |
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: | |
| 2fc2d1e9 | 59 | schedule_work(&sclp_cpu_capability_work); |
| 1e489518 HC |
60 | break; |
| 61 | } | |
| 2fc2d1e9 HC |
62 | } |
| 63 | ||
| 64 | static struct sclp_register sclp_conf_register = | |
| 65 | { | |
| 66 | .receive_mask = EVTYP_CONFMGMDATA_MASK, | |
| 67 | .receiver_fn = sclp_conf_receiver_fn, | |
| 68 | }; | |
| 69 | ||
| 70 | static int __init sclp_conf_init(void) | |
| 71 | { | |
| 2fc2d1e9 | 72 | INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify); |
| 1e489518 | 73 | INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify); |
| 1b60f68f | 74 | return sclp_register(&sclp_conf_register); |
| 2fc2d1e9 HC |
75 | } |
| 76 | ||
| 77 | __initcall(sclp_conf_init); |