diff options
| author | Holger Dengler <dengler@linux.ibm.com> | 2024-02-19 19:32:54 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-04-09 18:29:55 +0300 |
| commit | 2a483d333fd84acc009c7199fdd962af3ffc6b3b (patch) | |
| tree | 44cd6dea80511873ef4d5481b9ea5938b115c828 /arch/s390 | |
| parent | 05272aa499c48f230d862577d423de3e2b268e47 (diff) | |
| download | linux-2a483d333fd84acc009c7199fdd962af3ffc6b3b.tar.xz | |
s390/chsc: use notifier for AP configuration changes
The direct dependency of chsc and the AP bus prevents the
modularization of ap bus. Introduce a notifier interface for AP
changes, which decouples the producer of the change events (chsc) from
the consumer (ap_bus).
Remove the ap_cfg_chg() interface and replace it with the notifier
invocation. The ap bus module registers a notification handler, which
triggers the AP bus scan.
Cc: Vineeth Vijayan <vneethv@linux.ibm.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Holger Dengler <dengler@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ap.h | 11 | ||||
| -rw-r--r-- | arch/s390/include/asm/chsc.h | 15 |
2 files changed, 15 insertions, 11 deletions
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h index 2c5c907b1517..395b02d6a133 100644 --- a/arch/s390/include/asm/ap.h +++ b/arch/s390/include/asm/ap.h @@ -549,15 +549,4 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid, return reg1.status; } -/* - * Interface to tell the AP bus code that a configuration - * change has happened. The bus code should at least do - * an ap bus resource rescan. - */ -#if IS_ENABLED(CONFIG_ZCRYPT) -void ap_bus_cfg_chg(void); -#else -static inline void ap_bus_cfg_chg(void){} -#endif - #endif /* _ASM_S390_AP_H_ */ diff --git a/arch/s390/include/asm/chsc.h b/arch/s390/include/asm/chsc.h index bb48ea380c0d..bb78159d8042 100644 --- a/arch/s390/include/asm/chsc.h +++ b/arch/s390/include/asm/chsc.h @@ -11,6 +11,9 @@ #include <uapi/asm/chsc.h> +/* struct from linux/notifier.h */ +struct notifier_block; + /** * Operation codes for CHSC PNSO: * PNSO_OC_NET_BRIDGE_INFO - only addresses that are visible to a bridgeport @@ -66,4 +69,16 @@ struct chsc_pnso_area { struct chsc_pnso_naid_l2 entries[]; } __packed __aligned(PAGE_SIZE); +/* + * notifier interface - registered notifiers gets called on + * the following events: + * - ap config changed (CHSC_NOTIFY_AP_CFG) + */ +enum chsc_notify_type { + CHSC_NOTIFY_AP_CFG = 3, +}; + +int chsc_notifier_register(struct notifier_block *nb); +int chsc_notifier_unregister(struct notifier_block *nb); + #endif /* _ASM_S390_CHSC_H */ |