First up, with the MIPS changes comes initial support for the Octeon 3. The Octeon 3 is Cavium's new multi-core processor line-up announced at the end of 2013. The OCTEON III is MIPS64-based and optimized for Wind River Linux and VxWorks. The Octeon III claims up to 120GHz of 64-bit processing and is aimed for high-performance computing environments.
MIPS in Linux 3.16 also has para-virtualization support, improvements to the support for the Netlogix SoCs, improvements for the the Malta evaluation support, instruction additions for the in-kernel micro-assembler, large clean-ups in the code, increased the number of supported MIPS CPUs up to 256, and other updates and fixes.
Interested MIPS Linux users in these changes can find out more via the Git pull landing all of this new code.