[meta-amd] Random Reboot on R-Series Dual Core APU (bald-eagle)

[Peter Smith]

Hi,

Any help on this point would be appreciated. We are seeing random reboots
on a product based on the above (AMD RX-427 to be specific) which present
as an MCE error (see below for an example).

[Parsed by mcelog]

mcelog: Unknown CPU type vendor 2 family 21 model 0

Hardware event. This is not a software error.

CPU 0 4 northbridge

MISC c012000001000000

TIME 1547772066 Fri Jan 18 00:41:06 2019

                   Northbridge Link Protocol Error

       bit57 = processor context corrupt

       bit59 = misc error valid

       bit61 = error uncorrected

       bit62 = error overflow (multiple errors)

       bus error 'local node observed, request didn't time out

             generic error mem transaction

             generic access, level generic'

STATUS fa000010000b0c0f MCGSTATUS 0

CPUID Vendor AMD Family 21 Model 0

SOCKET 0 APIC 0 microcode 6003106


Does anyone know of any patches that should be applied that might fix this
issue. We are currently experimenting with the latest kernel (4.14.71) as
defined on the sumo branch of meta-amd, both with the radeon and amdgpu
graphics drivers. We do not yet know if either of these combinations
exhibits the same random reboot.



Best Regards
Peter
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