Linux 6.3 Features: AMD Auto IBRS To Steam Deck Controller Interface, IPv4 BIG TCP & More

Linux Security:

- Microsoft Pluton TPM CRB support as found in the latest AMD Ryzen mobile processors. This is for handling just the TPM2 Command Response Buffer (CRB) of the Pluton security chip and nothing more.

- Support for enabling STIBP when using legacy IBRS as part of the CPU security mitigations in order to protect user-space threads.

- KASLR support for LoongArch for kernel address space layout randomization.

- AVX2 and AVX-512 optimized versions of the ARIA cipher within the Linux kernel's crypto subsystem.

General Kernel Improvements:

- More Rust code has been merged ahead of the first Rust kernel drivers debuting in the near future.

- MEMFD and MGLRU enhancements.

- Microsoft Hyper-V nested hypervisor support.

- Minor optimizations to the scheduler code.

- Numerous KVM updates.

- Removed support for the Intel ICC compiler.

- Fixes for Zstd.

- Improvements to Restartable Sequences (RSEQ).

- Printk improvements in preparation for threaded/atomic consoles.

- The new hardware noise "hwnoise" tool.

- Objtool improvements for faster kernel builds and with lower peak memory use. Those building a "allyesconfig" kernel configuration will hopefully now be able to do so on systems with just 32GB of RAM without running into any problems.

Now onto some Linux 6.3 performance benchmarks!