MCE error on BayTrail (E3827)

MCE error on BayTrail (E3827)

We are doing  ESD test on E3827 platform,sudendly screen freezed and then os reboot,there are some log before reboot:

Disabling lock debugging due to kernel taint
mce: [Hardware Error]: CPU 1:Machine Check Exception: 4 Bank 0: b200000710000420
mce: [Hardware Error]: TSC 11e93b6704a
mce: [Hardware Error]: PROCESSOR 0:
mce: [Hardware Error]: PROCESSOR 0:30679 TIME 1482764474 SOCKET 0 APIC 4 microcode 901
mce: [Hardware Error]: Run the above through 'mcelog --ascii'
mce: [Hardware Error]: Some CPUs didn't answer in synchrnization
mce: [Hardware Error]: Machine check: Invalid
Kernel panic - not syncing: Fatal Machine check on current CPU
Shutting down cpus with NMI
Rebooting in 30 seconds..

1.what kind of hardware error happend?
2.what the direct reason leading to this hardware error? this error having something to do with ESD testing?

platform: ATOM E3827 CPU stepping D0
kernel: linux kernel 3.8.0

os:build by yocto

microcode patch version:901

BIOS info:

BIOS Vendor: American Megatrends
Core Version:  0.15 x32
Compliancy:  UEFI 2.3.1; PI 1.2


Thread Topic: 

Bug Report
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