@@ -490,6 +490,32 @@ static void ghes_handle_aer(struct acpi_hest_generic_data *gdata)
#endif
}
+static ATOMIC_NOTIFIER_HEAD(ghes_event_notify_list);
+
+/**
+ * ghes_register_event_notifier - register an event notifier
+ * for the non-fatal HW errors.
+ * @nb: pointer to the notifier_block structure of the event handler.
+ *
+ * return 0 : SUCCESS, non-zero : FAIL
+ */
+int ghes_register_event_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&ghes_event_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(ghes_register_event_notifier);
+
+/**
+ * ghes_unregister_event_notifier - unregister the previously
+ * registered event notifier.
+ * @nb: pointer to the notifier_block structure of the event handler.
+ */
+void ghes_unregister_event_notifier(struct notifier_block *nb)
+{
+ atomic_notifier_chain_unregister(&ghes_event_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(ghes_unregister_event_notifier);
+
static void ghes_do_proc(struct ghes *ghes,
const struct acpi_hest_generic_status *estatus)
{
@@ -526,10 +552,17 @@ static void ghes_do_proc(struct ghes *ghes,
log_arm_hw_error(err);
} else {
void *err = acpi_hest_get_payload(gdata);
+ u8 error_handled = false;
+ int ret;
+
+ ret = atomic_notifier_call_chain(&ghes_event_notify_list, 0, gdata);
+ if (ret & NOTIFY_OK)
+ error_handled = true;
log_non_standard_event(sec_type, fru_id, fru_text,
sec_sev, err,
- gdata->error_data_length);
+ gdata->error_data_length,
+ error_handled);
}
}
}
@@ -16,9 +16,10 @@
void log_non_standard_event(const guid_t *sec_type, const guid_t *fru_id,
const char *fru_text, const u8 sev, const u8 *err,
- const u32 len)
+ const u32 len, const u8 error_handled)
{
- trace_non_standard_event(sec_type, fru_id, fru_text, sev, err, len);
+ trace_non_standard_event(sec_type, fru_id, fru_text, sev,
+ err, len, error_handled);
}
void log_arm_hw_error(struct cper_sec_proc_arm *err)
@@ -50,6 +50,34 @@ enum {
GHES_SEV_PANIC = 0x3,
};
+
+#ifdef CONFIG_ACPI_APEI_GHES
+/**
+ * ghes_register_event_notifier - register an event notifier
+ * for the non-fatal HW errors.
+ * @nb: pointer to the notifier_block structure of the event notifier.
+ *
+ * Return : 0 - SUCCESS, non-zero - FAIL.
+ */
+int ghes_register_event_notifier(struct notifier_block *nb);
+
+/**
+ * ghes_unregister_event_notifier - unregister the previously
+ * registered event notifier.
+ * @nb: pointer to the notifier_block structure of the event notifier.
+ */
+void ghes_unregister_event_notifier(struct notifier_block *nb);
+#else
+static inline int ghes_register_event_notifier(struct notifier_block *nb)
+{
+ return -ENODEV;
+}
+
+static inline void ghes_unregister_event_notifier(struct notifier_block *nb)
+{
+}
+#endif
+
int ghes_estatus_pool_init(int num_ghes);
/* From drivers/edac/ghes_edac.c */
@@ -28,13 +28,15 @@ static inline int cec_add_elem(u64 pfn) { return -ENODEV; }
#ifdef CONFIG_RAS
void log_non_standard_event(const guid_t *sec_type,
const guid_t *fru_id, const char *fru_text,
- const u8 sev, const u8 *err, const u32 len);
+ const u8 sev, const u8 *err, const u32 len,
+ const u8 error_handled);
void log_arm_hw_error(struct cper_sec_proc_arm *err);
#else
static inline void
log_non_standard_event(const guid_t *sec_type,
const guid_t *fru_id, const char *fru_text,
- const u8 sev, const u8 *err, const u32 len)
+ const u8 sev, const u8 *err, const u32 len,
+ const u8 error_handled);
{ return; }
static inline void
log_arm_hw_error(struct cper_sec_proc_arm *err) { return; }
@@ -223,9 +223,10 @@ TRACE_EVENT(non_standard_event,
const char *fru_text,
const u8 sev,
const u8 *err,
- const u32 len),
+ const u32 len,
+ const u8 error_handled),
- TP_ARGS(sec_type, fru_id, fru_text, sev, err, len),
+ TP_ARGS(sec_type, fru_id, fru_text, sev, err, len, error_handled),
TP_STRUCT__entry(
__array(char, sec_type, UUID_SIZE)
@@ -234,6 +235,7 @@ TRACE_EVENT(non_standard_event,
__field(u8, sev)
__field(u32, len)
__dynamic_array(u8, buf, len)
+ __field(u8, error_handled)
),
TP_fast_assign(
@@ -243,6 +245,7 @@ TRACE_EVENT(non_standard_event,
__entry->sev = sev;
__entry->len = len;
memcpy(__get_dynamic_array(buf), err, len);
+ __entry->error_handled = error_handled;
),
TP_printk("severity: %d; sec type:%pU; FRU: %pU %s; data len:%d; raw data:%s",
Presently APEI does not support reporting the vendor specific HW errors, received in the vendor defined table entries, to the vendor drivers for any recovery. This patch adds the support to register and unregister the error handling function for the vendor specific HW errors and notify the registered kernel driver. Signed-off-by: Shiju Jose <shiju.jose@huawei.com> --- drivers/acpi/apei/ghes.c | 35 ++++++++++++++++++++++++++++++++++- drivers/ras/ras.c | 5 +++-- include/acpi/ghes.h | 28 ++++++++++++++++++++++++++++ include/linux/ras.h | 6 ++++-- include/ras/ras_event.h | 7 +++++-- 5 files changed, 74 insertions(+), 7 deletions(-)