Highlight the CXL RAS specific Firmware First error handling use cases that are implemented for the CXL specification which is generic in nature. When developing the support for the CXL RAS Firmware First, encountered different use cases that needs to be solved to implement the firmware and customer problems. The use cases resolution would involve the design and implementation of the firmware to handle them. Usage of primary and secondary Mailbox to overcome the IHV early adoption in engineering/debug effort. Common error signaling protocols usage for protocol errors. GUID and UUID usage in firmware on both CPU/host side, CXL devices and Operating system. Interaction communication failures between the CPU and CXL devices during boot time and run time that needs to be notified to users/operating system. Techniques used to improve the SMI latency. Error pollution use cases handling on both protocol, Memory error firmware notification (MEFN) and Flat2LM cases. The CXL ecosystem comprises of multitude of component vendors like SoC, Memory, Storage, Networking, etc. The explosive growth of internet content and the resulting data storage and computation requirements has resulted in the deployment of heterogenous and complex solutions in the very large-scale data centers. These warehouse sized buildings are packed with server, storage and network hardware. Specifically if there is a uncorrected fatal error detected by hardware that pose a containment risk. The system needs to be reset and restarted if possible to enable continued operation. The error affects the entire CXL device, a persistent/permanent memory device is considered to have experienced a dirty shut-down.
