From 4cf400e120b303c25fd378fb4286fa682e4e0a33 Mon Sep 17 00:00:00 2001 From: Eddie James <eajames@linux.ibm.com> Date: Tue, 19 Oct 2021 15:53:06 -0500 Subject: [PATCH] docs: ABI: testing: Document the OCC hwmon FFDC binary interface 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> --- .../testing/sysfs-bus-platform-devices-occ-hwmon | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-devices-occ-hwmon diff --git a/Documentation/ABI/testing/sysfs-bus-platform-devices-occ-hwmon b/Documentation/ABI/testing/sysfs-bus-platform-devices-occ-hwmon new file mode 100644 index 0000000000000..b24d7ab0278f3 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-platform-devices-occ-hwmon @@ -0,0 +1,13 @@ +What: /sys/bus/platform/devices/occ-hwmon.X/ffdc +KernelVersion: 5.15 +Contact: eajames@linux.ibm.com +Description: + Contains the First Failure Data Capture from the SBEFIFO + hardware, if there is any from a previous transfer. Otherwise, + the file is empty. The data is cleared when it's been + completely read by a user. As the name suggests, only the data + from the first error is saved, until it's cleared upon read. The OCC hwmon driver, running on + a Baseboard Management Controller (BMC), communicates with + POWER9 and up processors over the Self-Boot Engine (SBE) FIFO. + In many error conditions, the SBEFIFO will return error data + indicating the type of error and system state, etc. -- 2.30.2