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RAS are three aspects of the dependability of a system: Reliability: continuity of correct service Availability: readiness for correct service Serviceability: ability to undergo modifications and repairs ARMv8.2 provides RAS extensions to achieve the above features in a system. arm64_ras driver allows you to handle Correctable errors using per core Fault Handling Interrupt (or FHI). Un-correactable errors are handled by raising SError exception to kernel or Trusted Firmware(EL3) on CCLEX. The driver provides an API for CPU specific RAS drivers to register callbacks in case of FHI. When FHI occurs, the FHI ISR goes through the list of registered callbacks and executes them. Similarly, the driver allows registering SError callbacks for Un-correctable errors within Core, Core-Cluster & CCPLEX. When SError is reported, then those callbacks are scanned to find and report error in a Core, Cluster or CCPLEX Bug 3625675 Change-Id: I6dba7178fa7bbcf55bfa083be1b077874f4865c9 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2705396 GVS: Gerrit_Virtual_Submit