SUN4V-8002-MJ error on SPARC T4-1

Hi experts,

I know the suspect FRU is system board but I'd like to know what SUN4V-8002-MJ means.

Description says "chip-to-chip unrecoverable CRC error", would you tell me what is the chips

or bus error was detected ?

I assume it is CPU-CPU interconnect, CPU-BOB or CPU-PCIe bridge but T4-1 has sole CPU socket, I do not know

which caused the error.

Below is the log file obtained by fmadm.

Thank you

Tomonori-

# fmadm faulty
--------------- ------------------------------------  --------------
---------
TIME            EVENT-ID                              MSG-ID
SEVERITY
--------------- ------------------------------------  --------------
---------
Mar 01 10:35:54 9ffd6eb9-9502-67ad-bc60-c433821ec974  SUN4V-8002-MJ
Critical

Host        : sun-12-client-32
Platform    : ORCL,SPARC-T4-1   Chassis_id  :
Product_sn  :

Fault class : fault.cpu.generic-sparc.c2c-uc
Affects     :
hc://:product-id=ORCL,SPARC-T4-1:product-sn=1205BDYD44:server-id=sun-12-client-32:chassis-id=1205BDYD44/chassis=0/motherboard=0/chip=0