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Add documentation for the new binary sysfs that will dump the SBEFIFO FFDC. Signed-off-by: Eddie James <eajames@linux.ibm.com> Link: https://lore.kernel.org/r/20211019205307.36946-4-eajames@linux.ibm.com Signed-off-by: Joel Stanley <joel@jms.id.au>
14 lines
698 B
Plaintext
14 lines
698 B
Plaintext
What: /sys/bus/platform/devices/occ-hwmon.X/ffdc
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KernelVersion: 5.15
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Contact: eajames@linux.ibm.com
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Description:
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Contains the First Failure Data Capture from the SBEFIFO
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hardware, if there is any from a previous transfer. Otherwise,
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the file is empty. The data is cleared when it's been
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completely read by a user. As the name suggests, only the data
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from the first error is saved, until it's cleared upon read. The OCC hwmon driver, running on
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a Baseboard Management Controller (BMC), communicates with
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POWER9 and up processors over the Self-Boot Engine (SBE) FIFO.
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In many error conditions, the SBEFIFO will return error data
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indicating the type of error and system state, etc.
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