Determining a real PowerPC L2 cache parity error

This article introduces a way to correctly identify a real PowerPC level 2 cache parity error from syslog.

Sometimes we will see level 2 cache parity errors on PowerPC processors, but this might not be a real level 2 cache parity error. This article introduces a way to identify a real PowerPC L2 Cache Parity error from syslog.

You should match two criteria to determine a real PPC L2cache parity error:

1.System exception must be:0x00200
2.The 11 bit must be set in MSR register.
The MSR bits are mapped 0 … 31, so bit 11 is ‘0000 0000 0001 0000 1011 0000 0011 0000’.

Real PPC L2cache parity error example:

Registers:
False PPC L2cache parity error example:
Registers:

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James Palmer

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