diff options
| author | Santosh Sivaraj <santosh@fossix.org> | 2020-07-09 19:21:41 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-20 22:57:56 +1000 |
| commit | c37a63afc429ce959402168f67e4f094ab639ace (patch) | |
| tree | 20b724de3e51d332276a97de8f867defa30e50d2 /arch/powerpc/kernel/mce.c | |
| parent | af9d00e93a4f062c5f160325d7b8f33336f6744e (diff) | |
powerpc/mce: Add MCE notification chain
Introduce notification chain which lets us know about uncorrected memory
errors(UE). This would help prospective users in pmem or nvdimm subsystem
to track bad blocks for better handling of persistent memory allocations.
Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709135142.721504-1-santosh@fossix.org
Diffstat (limited to 'arch/powerpc/kernel/mce.c')
| -rw-r--r-- | arch/powerpc/kernel/mce.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c index fd90c0eda229..b7b3ed4e6193 100644 --- a/arch/powerpc/kernel/mce.c +++ b/arch/powerpc/kernel/mce.c @@ -49,6 +49,20 @@ static struct irq_work mce_ue_event_irq_work = { DECLARE_WORK(mce_ue_event_work, machine_process_ue_event); +static BLOCKING_NOTIFIER_HEAD(mce_notifier_list); + +int mce_register_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&mce_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(mce_register_notifier); + +int mce_unregister_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&mce_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(mce_unregister_notifier); + static void mce_set_error_info(struct machine_check_event *mce, struct mce_error_info *mce_err) { @@ -278,6 +292,7 @@ static void machine_process_ue_event(struct work_struct *work) while (__this_cpu_read(mce_ue_count) > 0) { index = __this_cpu_read(mce_ue_count) - 1; evt = this_cpu_ptr(&mce_ue_event_queue[index]); + blocking_notifier_call_chain(&mce_notifier_list, 0, evt); #ifdef CONFIG_MEMORY_FAILURE /* * This should probably queued elsewhere, but |