ACPI / APEI: Add a notifier chain for unknown (vendor) CPER records (9aa9cf3e) · Commits · 戴 / test

drivers/acpi/apei/ghes.c

+63 −0

Original line number	Diff line number	Diff line
		@@ -79,6 +79,12 @@
		((struct acpi_hest_generic_status *) \
		((struct ghes_estatus_node *)(estatus_node) + 1))

		#define GHES_VENDOR_ENTRY_LEN(gdata_len) \
		(sizeof(struct ghes_vendor_record_entry) + (gdata_len))
		#define GHES_GDATA_FROM_VENDOR_ENTRY(vendor_entry) \
		((struct acpi_hest_generic_data *) \
		((struct ghes_vendor_record_entry *)(vendor_entry) + 1))

		/*
		* NMI-like notifications vary by architecture, before the compiler can prune
		* unused static functions it needs a value for these enums.
		@@ -123,6 +129,12 @@ static DEFINE_MUTEX(ghes_list_mutex);
		*/
		static DEFINE_SPINLOCK(ghes_notify_lock_irq);

		struct ghes_vendor_record_entry {
		struct work_struct work;
		int error_severity;
		char vendor_record[];
		};

		static struct gen_pool *ghes_estatus_pool;
		static unsigned long ghes_estatus_pool_size_request;

		@@ -511,6 +523,56 @@ static void ghes_handle_aer(struct acpi_hest_generic_data *gdata)
		#endif
		}

		static BLOCKING_NOTIFIER_HEAD(vendor_record_notify_list);

		int ghes_register_vendor_record_notifier(struct notifier_block *nb)
		{
		return blocking_notifier_chain_register(&vendor_record_notify_list, nb);
		}
		EXPORT_SYMBOL_GPL(ghes_register_vendor_record_notifier);

		void ghes_unregister_vendor_record_notifier(struct notifier_block *nb)
		{
		blocking_notifier_chain_unregister(&vendor_record_notify_list, nb);
		}
		EXPORT_SYMBOL_GPL(ghes_unregister_vendor_record_notifier);

		static void ghes_vendor_record_work_func(struct work_struct *work)
		{
		struct ghes_vendor_record_entry *entry;
		struct acpi_hest_generic_data *gdata;
		u32 len;

		entry = container_of(work, struct ghes_vendor_record_entry, work);
		gdata = GHES_GDATA_FROM_VENDOR_ENTRY(entry);

		blocking_notifier_call_chain(&vendor_record_notify_list,
		entry->error_severity, gdata);

		len = GHES_VENDOR_ENTRY_LEN(acpi_hest_get_record_size(gdata));
		gen_pool_free(ghes_estatus_pool, (unsigned long)entry, len);
		}

		static void ghes_defer_non_standard_event(struct acpi_hest_generic_data *gdata,
		int sev)
		{
		struct acpi_hest_generic_data *copied_gdata;
		struct ghes_vendor_record_entry *entry;
		u32 len;

		len = GHES_VENDOR_ENTRY_LEN(acpi_hest_get_record_size(gdata));
		entry = (void *)gen_pool_alloc(ghes_estatus_pool, len);
		if (!entry)
		return;

		copied_gdata = GHES_GDATA_FROM_VENDOR_ENTRY(entry);
		memcpy(copied_gdata, gdata, acpi_hest_get_record_size(gdata));
		entry->error_severity = sev;

		INIT_WORK(&entry->work, ghes_vendor_record_work_func);
		schedule_work(&entry->work);
		}

		static bool ghes_do_proc(struct ghes *ghes,
		const struct acpi_hest_generic_status *estatus)
		{
		@@ -549,6 +611,7 @@ static bool ghes_do_proc(struct ghes *ghes,
		} else {
		void *err = acpi_hest_get_payload(gdata);

		ghes_defer_non_standard_event(gdata, sev);
		log_non_standard_event(sec_type, fru_id, fru_text,
		sec_sev, err,
		gdata->error_data_length);

include/acpi/ghes.h

+18 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,24 @@ enum {
		GHES_SEV_PANIC = 0x3,
		};

		#ifdef CONFIG_ACPI_APEI_GHES
		/**
		* ghes_register_vendor_record_notifier - register a notifier for vendor
		* records that the kernel would otherwise ignore.
		* @nb: pointer to the notifier_block structure of the event handler.
		*
		* return 0 : SUCCESS, non-zero : FAIL
		*/
		int ghes_register_vendor_record_notifier(struct notifier_block *nb);

		/**
		* ghes_unregister_vendor_record_notifier - unregister the previously
		* registered vendor record notifier.
		* @nb: pointer to the notifier_block structure of the vendor record handler.
		*/
		void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
		#endif

		int ghes_estatus_pool_init(int num_ghes);

		/* From drivers/edac/ghes_edac.c */

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