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authorTyler Baicar <tbaicar@codeaurora.org>2017-06-21 21:17:11 +0300
committerWill Deacon <will.deacon@arm.com>2017-06-22 20:22:04 +0300
commit0fc300f414519b10c146fc3329a1b3094e4b6d52 (patch)
tree01294050c3dbd26bc94d3594f9dd1cce99cab899 /drivers/firmware
parent2fb5853e4442334cb66fc2ab33a51c91d4434769 (diff)
downloadlinux-0fc300f414519b10c146fc3329a1b3094e4b6d52.tar.xz
efi: print unrecognized CPER section
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>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/cper.c11
1 files 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;