This series replaces two previously-sent series: - https://lore.kernel.org/linux-edac/cover.1719219886.git.mchehab+huawei@xxxxxxxxxx/T/#t - https://lore.kernel.org/linux-edac/cover.1719484498.git.mchehab+huawei@xxxxxxxxxx/T/#t It is also available at: https://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac.git/log/?h=edac-arm64 This is needed for both kernelspace and userspace properly handle ARM processor CPER events. Patches 1 and 2 of this series fix the UEFI 2.6+ implementation of the ARM trace event, as the original implementation was incomplete. Changeset e9279e83ad1f ("trace, ras: add ARM processor error trace event") added such event, but it reports only some fields of the CPER record defined on UEFI 2.6+ appendix N, table N.16. Those are not enough actually parse such events on userspace, as not even the event type is exported. Patch 3 fixes a compilation breakage when W=1; Patch 4 adds a new helper function to be used by cper and ghes drivers to display CPER bitmaps; Patch 5 fixes CPER logic according with UEFI 2.9A errata. Before it, there was no description about how processor type field was encoded. The errata defines it as a bitmask, and provides the information about how it should be encoded. Patch 6 adds CPER functions to Kernel-doc. This series was validated with the help of an ARM EINJ code for QEMU: https://github.com/mchehab/rasdaemon/wiki/error-injection Using the QEMU injection code at: https://gitlab.com/mchehab_kernel/qemu/-/commits/arm-error-inject-v2?ref_type=heads Running it on QEMU and sending those commands via QEMU QMP interface: { "execute": "qmp_capabilities" } { "execute": "arm-inject-error", "arguments": { "validation": ["mpidr-valid", "affinity-valid", "running-state-valid", "vendor-specific-valid"], "running-state": [], "psci-state": 1229279264, "error": [ {"type": ["tlb-error", "bus-error", "micro-arch-error"], "multiple-error": 2}, {"type": ["micro-arch-error"]}, {"type": ["tlb-error"]}, {"type": ["bus-error"]}, {"type": ["cache-error"]}]} } The CPER event is now properly handled: [ 53.223383] {1}[Hardware Error]: event severity: recoverable [ 53.223690] {1}[Hardware Error]: Error 0, type: recoverable [ 53.224073] {1}[Hardware Error]: section_type: ARM processor error [ 53.224419] {1}[Hardware Error]: MIDR: 0x0000000000000000 [ 53.224694] {1}[Hardware Error]: Multiprocessor Affinity Register (MPIDR): 0x0000000080000000 [ 53.225029] {1}[Hardware Error]: error affinity level: 2 [ 53.225266] {1}[Hardware Error]: running state: 0x0 [ 53.225516] {1}[Hardware Error]: Power State Coordination Interface state: 1229279264 [ 53.225857] {1}[Hardware Error]: Error info structure 0: [ 53.226094] {1}[Hardware Error]: num errors: 3 [ 53.226317] {1}[Hardware Error]: first error captured [ 53.226548] {1}[Hardware Error]: propagated error captured [ 53.226806] {1}[Hardware Error]: overflow occurred, error info is incomplete [ 53.227180] {1}[Hardware Error]: error_type: 0x1c: TLB error|bus error|micro-architectural error [ 53.227549] {1}[Hardware Error]: error_info: 0x000000000054007f [ 53.227819] {1}[Hardware Error]: virtual fault address: 0x0000000067320230 [ 53.228106] {1}[Hardware Error]: physical fault address: 0x000000005cdfd492 [ 53.228403] {1}[Hardware Error]: Error info structure 1: [ 53.228636] {1}[Hardware Error]: num errors: 3 [ 53.228840] {1}[Hardware Error]: first error captured [ 53.229061] {1}[Hardware Error]: propagated error captured [ 53.229296] {1}[Hardware Error]: overflow occurred, error info is incomplete [ 53.229577] {1}[Hardware Error]: error_type: 0x10: micro-architectural error [ 53.229873] {1}[Hardware Error]: error_info: 0x0000000078da03ff [ 53.230130] {1}[Hardware Error]: virtual fault address: 0x0000000067320230 [ 53.230412] {1}[Hardware Error]: physical fault address: 0x000000005cdfd492 [ 53.230694] {1}[Hardware Error]: Error info structure 2: [ 53.230924] {1}[Hardware Error]: num errors: 3 [ 53.231128] {1}[Hardware Error]: first error captured [ 53.231349] {1}[Hardware Error]: propagated error captured [ 53.231582] {1}[Hardware Error]: overflow occurred, error info is incomplete [ 53.231863] {1}[Hardware Error]: error_type: 0x04: TLB error [ 53.232116] {1}[Hardware Error]: error_info: 0x000000000054007f [ 53.232396] {1}[Hardware Error]: transaction type: Instruction [ 53.232686] {1}[Hardware Error]: TLB error, operation type: Instruction fetch [ 53.232998] {1}[Hardware Error]: TLB level: 1 [ 53.233215] {1}[Hardware Error]: processor context not corrupted [ 53.233479] {1}[Hardware Error]: the error has not been corrected [ 53.233740] {1}[Hardware Error]: PC is imprecise [ 53.233974] {1}[Hardware Error]: virtual fault address: 0x0000000067320230 [ 53.234264] {1}[Hardware Error]: physical fault address: 0x000000005cdfd492 [ 53.234547] {1}[Hardware Error]: Error info structure 3: [ 53.234776] {1}[Hardware Error]: num errors: 3 [ 53.234980] {1}[Hardware Error]: first error captured [ 53.235199] {1}[Hardware Error]: propagated error captured [ 53.235433] {1}[Hardware Error]: overflow occurred, error info is incomplete [ 53.235714] {1}[Hardware Error]: error_type: 0x08: bus error [ 53.235966] {1}[Hardware Error]: error_info: 0x00000080d6460fff [ 53.236223] {1}[Hardware Error]: transaction type: Generic [ 53.236478] {1}[Hardware Error]: bus error, operation type: Generic read (type of instruction or data request cannot be determined) [ 53.236923] {1}[Hardware Error]: affinity level at which the bus error occurred: 1 [ 53.237234] {1}[Hardware Error]: processor context corrupted [ 53.237481] {1}[Hardware Error]: the error has been corrected [ 53.237728] {1}[Hardware Error]: PC is imprecise [ 53.237937] {1}[Hardware Error]: Program execution can be restarted reliably at the PC associated with the error. [ 53.238329] {1}[Hardware Error]: participation type: Local processor observed [ 53.238627] {1}[Hardware Error]: request timed out [ 53.238851] {1}[Hardware Error]: address space: External Memory Access [ 53.239129] {1}[Hardware Error]: memory access attributes:0x20 [ 53.239393] {1}[Hardware Error]: access mode: secure [ 53.239613] {1}[Hardware Error]: virtual fault address: 0x0000000067320230 [ 53.239890] {1}[Hardware Error]: physical fault address: 0x000000005cdfd492 [ 53.240168] {1}[Hardware Error]: Error info structure 4: [ 53.240396] {1}[Hardware Error]: num errors: 3 [ 53.240601] {1}[Hardware Error]: first error captured [ 53.240816] {1}[Hardware Error]: propagated error captured [ 53.241048] {1}[Hardware Error]: overflow occurred, error info is incomplete [ 53.241332] {1}[Hardware Error]: error_type: 0x02: cache error [ 53.241589] {1}[Hardware Error]: error_info: 0x000000000091000f [ 53.241843] {1}[Hardware Error]: transaction type: Data Access [ 53.242101] {1}[Hardware Error]: cache error, operation type: Data write [ 53.242385] {1}[Hardware Error]: cache level: 2 [ 53.242596] {1}[Hardware Error]: processor context not corrupted [ 53.242847] {1}[Hardware Error]: virtual fault address: 0x0000000067320230 [ 53.243125] {1}[Hardware Error]: physical fault address: 0x000000005cdfd492 [ 53.243426] {1}[Hardware Error]: Context info structure 0: [ 53.243675] {1}[Hardware Error]: register context type: AArch64 EL1 context registers [ 53.244185] {1}[Hardware Error]: 00000000: 12abde67 00000000 00000000 00000000 [ 53.244540] {1}[Hardware Error]: 00000010: 00000000 00000000 00000000 00000000 [ 53.244864] {1}[Hardware Error]: 00000020: 00000000 00000000 00000000 00000000 [ 53.245183] {1}[Hardware Error]: 00000030: 00000000 00000000 00000000 00000000 [ 53.245504] {1}[Hardware Error]: 00000040: 00000000 00000000 00000000 00000000 [ 53.245828] {1}[Hardware Error]: 00000050: 00000000 00000000 00000000 00000000 [ 53.246149] {1}[Hardware Error]: 00000060: 00000000 00000000 00000000 00000000 [ 53.246475] {1}[Hardware Error]: 00000070: 00000000 00000000 00000000 00000000 [ 53.246799] {1}[Hardware Error]: 00000080: 00000000 00000000 00000000 00000000 [ 53.247122] {1}[Hardware Error]: 00000090: 00000000 00000000 00000000 00000000 [ 53.247446] {1}[Hardware Error]: 000000a0: 00000000 00000000 00000000 00000000 [ 53.247767] {1}[Hardware Error]: 000000b0: 00000000 00000000 00000000 00000000 [ 53.248090] {1}[Hardware Error]: 000000c0: 00000000 00000000 00000000 00000000 [ 53.248415] {1}[Hardware Error]: 000000d0: 00000000 00000000 00000000 00000000 [ 53.248739] {1}[Hardware Error]: 000000e0: 00000000 00000000 00000000 00000000 [ 53.249064] {1}[Hardware Error]: 000000f0: 00000000 00000000 00000000 00000000 [ 53.249398] {1}[Hardware Error]: 00000100: 00000000 00000000 00000000 00000000 [ 53.249727] {1}[Hardware Error]: 00000110: 00000000 00000000 00000000 00000000 [ 53.250053] {1}[Hardware Error]: 00000120: 00000000 00000000 00000000 00000000 [ 53.250377] {1}[Hardware Error]: 00000130: 00000000 00000000 00000000 00000000 [ 53.250700] {1}[Hardware Error]: 00000140: 00000000 00000000 00000000 00000000 [ 53.251038] {1}[Hardware Error]: 00000150: 00000000 00000000 00000000 00000000 [ 53.251368] {1}[Hardware Error]: 00000160: 00000000 00000000 00000000 00000000 [ 53.251694] {1}[Hardware Error]: 00000170: 00000000 00000000 00000000 00000000 [ 53.252017] {1}[Hardware Error]: 00000180: 00000000 00000000 00000000 00000000 [ 53.252342] {1}[Hardware Error]: 00000190: 00000000 00000000 00000000 00000000 [ 53.252664] {1}[Hardware Error]: 000001a0: 00000000 00000000 00000000 00000000 [ 53.252984] {1}[Hardware Error]: 000001b0: 00000000 00000000 00000000 00000000 [ 53.253309] {1}[Hardware Error]: 000001c0: 00000000 00000000 00000000 00000000 [ 53.253630] {1}[Hardware Error]: 000001d0: 00000000 00000000 00000000 00000000 [ 53.253949] {1}[Hardware Error]: 000001e0: 00000000 00000000 00000000 00000000 [ 53.254273] {1}[Hardware Error]: 000001f0: 00000000 00000000 00000000 00000000 [ 53.254595] {1}[Hardware Error]: 00000200: 00000000 00000000 00000000 00000000 [ 53.254917] {1}[Hardware Error]: 00000210: 00000000 00000000 00000000 00000000 [ 53.255245] {1}[Hardware Error]: 00000220: 00000000 00000000 00000000 00000000 [ 53.255569] {1}[Hardware Error]: 00000230: 00000000 00000000 00000000 00000000 [ 53.255890] {1}[Hardware Error]: 00000240: 00000000 00000000 00000000 00000000 [ 53.256794] [Firmware Warn]: GHES: Unhandled processor error type 0x1c: TLB error|bus error|micro-architectural error [ 53.257203] [Firmware Warn]: GHES: Unhandled processor error type 0x10: micro-architectural error [ 53.257543] [Firmware Warn]: GHES: Unhandled processor error type 0x04: TLB error [ 53.257842] [Firmware Warn]: GHES: Unhandled processor error type 0x08: bus error - I also tested the ghes and cper reports both with and without this change, using different versions of rasdaemon, with and without support for the extended trace event. Those are a summary of the test results: - adding more fields to the trace events didn't break userspace API: both versions of rasdaemon handled it; - the rasdaemon patches to handle the new trace report was missing a backward-compatibility logic. I fixed already. So, rasdaemon can now handle both old and new trace events. Btw, rasdaemon has gained support for the extended trace since its version 0.5.8 (released in 2021). I didn't saw any issues there complain about troubles on it, so either distros used on ARM servers are using an old version of rasdaemon, or they're carrying on the trace event changes as well. Daniel Ferguson (1): RAS: ACPI: APEI: add conditional compilation to ARM error report functions Mauro Carvalho Chehab (4): efi/cper: Adjust infopfx size to accept an extra space efi/cper: Add a new helper function to print bitmasks efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs docs: efi: add CPER functions to driver-api Shengwei Luo (1): RAS: Report all ARM processor CPER information to userspace .../driver-api/firmware/efi/index.rst | 11 ++-- drivers/acpi/apei/ghes.c | 31 +++++------ drivers/firmware/efi/cper-arm.c | 52 +++++++++---------- drivers/firmware/efi/cper.c | 43 ++++++++++++++- drivers/ras/ras.c | 47 ++++++++++++++++- include/linux/cper.h | 12 +++-- include/linux/ras.h | 16 ++++-- include/ras/ras_event.h | 48 +++++++++++++++-- 8 files changed, 198 insertions(+), 62 deletions(-) -- 2.45.2
