[PATCH 1/3] powerpc/mce: Add MCE notification chain
From: Santosh Sivaraj <hidden>
Date: 2019-08-20 02:51:08
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
This is needed to report bad blocks for persistent memory. Signed-off-by: Santosh Sivaraj <redacted> --- arch/powerpc/include/asm/mce.h | 3 +++ arch/powerpc/kernel/mce.c | 15 +++++++++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h
index e1931c8c2743..b1c6363f924c 100644
--- a/arch/powerpc/include/asm/mce.h
+++ b/arch/powerpc/include/asm/mce.h@@ -212,6 +212,9 @@ extern void machine_check_queue_event(void); extern void machine_check_print_event_info(struct machine_check_event *evt, bool user_mode, bool in_guest); unsigned long addr_to_phys(struct pt_regs *regs, unsigned long addr); +int mce_register_notifier(struct notifier_block *nb); +int mce_unregister_notifier(struct notifier_block *nb); + #ifdef CONFIG_PPC_BOOK3S_64 void flush_and_reload_slb(void); #endif /* CONFIG_PPC_BOOK3S_64 */
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index ec4b3e1087be..a78210ca6cd9 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c@@ -47,6 +47,20 @@ 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) {
@@ -263,6 +277,7 @@ 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
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2.21.0