1*4cf400e1SEddie JamesWhat: /sys/bus/platform/devices/occ-hwmon.X/ffdc 2*4cf400e1SEddie JamesKernelVersion: 5.15 3*4cf400e1SEddie JamesContact: eajames@linux.ibm.com 4*4cf400e1SEddie JamesDescription: 5*4cf400e1SEddie James Contains the First Failure Data Capture from the SBEFIFO 6*4cf400e1SEddie James hardware, if there is any from a previous transfer. Otherwise, 7*4cf400e1SEddie James the file is empty. The data is cleared when it's been 8*4cf400e1SEddie James completely read by a user. As the name suggests, only the data 9*4cf400e1SEddie James from the first error is saved, until it's cleared upon read. The OCC hwmon driver, running on 10*4cf400e1SEddie James a Baseboard Management Controller (BMC), communicates with 11*4cf400e1SEddie James POWER9 and up processors over the Self-Boot Engine (SBE) FIFO. 12*4cf400e1SEddie James In many error conditions, the SBEFIFO will return error data 13*4cf400e1SEddie James indicating the type of error and system state, etc. 14