What: /sys/class/remoteproc/.../firmware Date: October 2016 Contact: Matt Redfearn Description: Remote processor firmware Reports the name of the firmware currently loaded to the remote processor. To change the running firmware, ensure the remote processor is stopped (using /sys/class/remoteproc/.../state) and write a new filename. What: /sys/class/remoteproc/.../state Date: October 2016 Contact: Matt Redfearn Description: Remote processor state Reports the state of the remote processor, which will be one of: - "offline" - "suspended" - "running" - "crashed" - "invalid" "offline" means the remote processor is powered off. "suspended" means that the remote processor is suspended and must be woken to receive messages. "running" is the normal state of an available remote processor "crashed" indicates that a problem/crash has been detected on the remote processor. "invalid" is returned if the remote processor is in an unknown state. Writing this file controls the state of the remote processor. The following states can be written: - "start" - "stop" Writing "start" will attempt to start the processor running the firmware indicated by, or written to, /sys/class/remoteproc/.../firmware. The remote processor should transition to "running" state. Writing "stop" will attempt to halt the remote processor and return it to the "offline" state. What: /sys/class/remoteproc/.../name Date: August 2019 KernelVersion: 5.4 Contact: Suman Anna Description: Remote processor name Reports the name of the remote processor. This can be used by userspace in exactly identifying a remote processor and ease up the usage in modifying the 'firmware' or 'state' files. What: /sys/class/remoteproc/.../coredump Date: July 2020 Contact: Bjorn Andersson , Ohad Ben-Cohen Description: Remote processor coredump configuration Reports the coredump configuration of the remote processor, which will be one of: "disabled" "enabled" "inline" "disabled" means no dump will be collected. "enabled" means when the remote processor's coredump is collected it will be copied to a separate buffer and that buffer is exposed to userspace. "inline" means when the remote processor's coredump is collected userspace will directly read from the remote processor's device memory. Extra buffer will not be used to copy the dump. Also recovery process will not proceed until all data is read by userspace. What: /sys/class/remoteproc/.../recovery Date: July 2020 Contact: Bjorn Andersson , Ohad Ben-Cohen Description: Remote processor recovery mechanism Reports the recovery mechanism of the remote processor, which will be one of: "enabled" "disabled" "enabled" means, the remote processor will be automatically recovered whenever it crashes. Moreover, if the remote processor crashes while recovery is disabled, it will be automatically recovered too as soon as recovery is enabled. "disabled" means, a remote processor will remain in a crashed state if it crashes. This is useful for debugging purposes; without it, debugging a crash is substantially harder.