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Subject[PATCH v5 2/3] GHES: add a notify chain for process memory section
Date
Add a notify chain for process memory section, with
which other modules might do error recovery.

Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Tested-by: Wang Xiongfeng <wangxiongfeng2@huawei.com>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
---
drivers/acpi/apei/ghes.c | 10 ++++++++++
include/acpi/ghes.h | 8 ++++++++
2 files changed, 18 insertions(+)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index cff671d..1f0ebfb 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -109,6 +109,9 @@ static inline bool is_hest_type_generic_v2(struct ghes *ghes)
static LIST_HEAD(ghes_hed);
static DEFINE_MUTEX(ghes_list_mutex);

+ATOMIC_NOTIFIER_HEAD(ghes_mem_err_chain);
+EXPORT_SYMBOL(ghes_mem_err_chain);
+
/*
* Because the memory area used to transfer hardware error information
* from BIOS to Linux can be determined only in NMI, IRQ or timer
@@ -441,6 +444,13 @@ static void ghes_do_proc(struct ghes *ghes,

if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
+ struct ghes_mem_err mem;
+
+ mem.notify_type = ghes->generic->notify.type;
+ mem.severity = gdata->error_severity;
+ mem.mem_err = mem_err;
+
+ atomic_notifier_call_chain(&ghes_mem_err_chain, 0, &mem);

ghes_edac_report_mem_error(ghes, sev, mem_err);

diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index d626367..921ebf1 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -124,4 +124,12 @@ static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
extern void ghes_arm_process_error(struct ghes *ghes,
struct cper_sec_proc_arm *err);

+struct ghes_mem_err {
+ int notify_type;
+ int severity;
+ struct cper_sec_mem_err *mem_err;
+};
+
+extern struct atomic_notifier_head ghes_mem_err_chain;
+
#endif /* GHES_H */
--
1.8.3.1
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