From f76958f914fd4c78519b375ad1117fa2b6d1d09e Mon Sep 17 00:00:00 2001
From: Tyler Baicar <tbaicar@codeaurora.org>
Date: Wed, 21 Jun 2017 12:17:11 -0600
Subject: [PATCH 26/32] efi: print unrecognized CPER section
Git-commit: 0fc300f414519b10c146fc3329a1b3094e4b6d52
Patch-mainline: v4.13-rc1
References: fate#323583
UEFI spec allows for non-standard section in Common Platform Error
Record. This is defined in section N.2.3 of UEFI version 2.5.
Currently if the CPER section's type (UUID) does not match with
one of the section types that the kernel knows how to parse, the
section is skipped. Therefore, user is not able to see
such CPER data, for instance, error record of non-standard section.
This change prints out the raw data in hex in the dmesg buffer so
that non-standard sections are reported to the user. Non-standard
section type errors should be reported to the user because these
can include errors which are vendor specific. The data length is
taken from Error Data length field of Generic Error Data Entry.
The following is a sample output from dmesg:
Hardware error from APEI Generic Hardware Error Source: 2
It has been corrected by h/w and requires no further action
event severity: corrected
time: precise 2017-03-15 20:37:35
Error 0, type: corrected
section type: unknown, d2e2621c-f936-468d-0d84-15a4ed015c8b
section length: 0x238
00000000: 4d415201 4d492031 453a4d45 435f4343 .RAM1 IMEM:ECC_C
00000010: 53515f45 44525f42 00000000 00000000 E_QSB_RD........
00000020: 00000000 00000000 00000000 00000000 ................
00000030: 00000000 00000000 01010000 01010000 ................
00000040: 00000000 00000000 00000005 00000000 ................
00000050: 01010000 00000000 00000001 00dddd00 ................
...
The raw data from the error can then be decoded using vendor
specific tools.
Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/firmware/efi/cper.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index eac08548d233..d5a5855906d6 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -585,8 +585,15 @@ cper_estatus_print_section(const char *pfx, struct acpi_hest_generic_data *gdata
else
goto err_section_too_small;
#endif
- } else
- printk("%s""section type: unknown, %pUl\n", newpfx, sec_type);
+ } else {
+ const void *err = acpi_hest_get_payload(gdata);
+
+ printk("%ssection type: unknown, %pUl\n", newpfx, sec_type);
+ printk("%ssection length: %#x\n", newpfx,
+ gdata->error_data_length);
+ print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, 4, err,
+ gdata->error_data_length, true);
+ }
return;
--
2.11.0