changes log since v1: - fix a compile waring by dereferencing rcd pointer before memset - add a compile error by add CONFIG_X86_MCE - Link: https://lore.kernel.org/all/20230916130316.65815-3-xueshuai@xxxxxxxxxxxxxxxxx/ In certain scenarios (ie. hosts/guests with root filesystems on NFS/iSCSI where networking software and/or hardware fails, and thus kdump fails), it is necessary to serialize hardware error information available for post-mortem debugging. Save the hardware error log into flash via ERST before go panic, the hardware error log can be gotten from the flash after system boot successful again, which is very useful in production. On X86 platform, the kernel has supported to serialize and deserialize MCE error record by commit 482908b49ebf ("ACPI, APEI, Use ERST for persistent storage of MCE"). The process involves two steps: - MCE Producer: When a hardware error is detected, MCE raised and its handler writes MCE error record into flash via ERST before panic - MCE Consumor: After system reboot, /sbin/mcelog run, it reads /dev/mcelog to check flash for error record of previous boot via ERST After /dev/mcelog character device deprecated by commit 5de97c9f6d85 ("x86/mce: Factor out and deprecate the /dev/mcelog driver"), the serialized MCE error record, of previous boot in persistent storage is not collected via APEI ERST. This patch set include two part: - PATCH 1-3: rework apei_{read,write}_mce to use pstore data structure and emit the mce_record tracepoint, enabling the collection of MCE records by the rasdaemon tool. - PATCH 4-9: use ERST for persistent storage of APEI errors, and emit tracepoints for CPER sections, enabling the collection of MCE records by the rasdaemon tool. Shuai Xue (9): pstore: move pstore creator id, section type and record struct to common header ACPI: APEI: Use common ERST struct to read/write serialized MCE record ACPI: APEI: ERST: Emit the mce_record tracepoint ACPI: tables: change section_type of generic error data as guid_t ACPI: APEI: GHES: Use ERST to serialize APEI generic error before panic ACPI: APEI: GHES: export ghes_report_chain ACPI: APEI: ESRT: kick ghes_report_chain notifier to report serialized memory errors ACPI: APEI: ESRT: print AER to report serialized PCIe errors ACPI: APEI: ESRT: log ARM processor error arch/x86/kernel/cpu/mce/apei.c | 82 +++++++++++++++------------------- drivers/acpi/acpi_extlog.c | 2 +- drivers/acpi/apei/erst.c | 55 ++++++++++++++--------- drivers/acpi/apei/ghes.c | 48 +++++++++++++++++++- drivers/firmware/efi/cper.c | 2 +- fs/pstore/platform.c | 3 ++ include/acpi/actbl1.h | 5 ++- include/acpi/ghes.h | 2 +- include/linux/pstore.h | 29 ++++++++++++ 9 files changed, 154 insertions(+), 74 deletions(-) -- 2.41.0
