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Explore the implementation of big-endian Linux on RISC-V architecture in this 26-minute conference talk from the Linux Foundation. Learn about the latest RISC-V ISA specification that enables runtime configuration of data endianness between little and big-endian modes. Discover the challenges and solutions involved in creating a prototype Linux implementation running in big-endian mode on an emulated RISC-V system using QEMU. Follow the speakers' journey from initial analysis through the necessary modifications to critical software components including the Linux kernel, QEMU, and OpenSBI. Understand the complexities of mixed-endian KVM instances and the required modifications to kvmtool for proper functionality. Gain insights into the various issues encountered during development and their corresponding fixes. Conclude with an overview of the project outcomes, published results, and ongoing opportunities for testing and resolving remaining challenges in big-endian RISC-V Linux implementation.
