# Version 0.16.0 (2025-08-04) This release introduces initial support for the **LoongArch CPU architecture**, a major milestone for the project. Version 0.16.0 also significantly expands our Linux ABI compatibility with the addition of **nine new system calls** such as `memfd_create` and `pidfd_open`. Key enhancements include expanded functionality for **UNIX sockets (file descriptor passing and the `SOCK_SEQPACKET` socket type)**, partial support for **netlink sockets of the `NETLINK_KOBJECT_UEVENT` type**, the initial implementation of **CgroupFS**, and a major testing improvement with the integration of system call tests from the **Linux Test Project (LTP)**. We've also adopted **[Nix](https://nix.dev/manual/nix/2.28/introduction)** for building the initramfs, streamlining our cross-compilation and testing workflow. ## Asterinas Kernel We have made the following key changes to the Asterinas kernel: * New system calls or features: * Memory: * [Add the `mremap` system call](https://github.com/asterinas/asterinas/pull/2162) * [Add the `msync` system call based on an inefficient implementation](https://github.com/asterinas/asterinas/pull/2154) * [Add the `memfd_create` system call](https://github.com/asterinas/asterinas/pull/2149) * Processes and IPC: * [Add the `pidfd_open` system call along with the `CLONE_PIDFD` flag](https://github.com/asterinas/asterinas/pull/2151) * File systems and I/O in general: * [Add the `close_range` system call](https://github.com/asterinas/asterinas/pull/2128) * [Add the `fadvise64` system call (dummy implementation)](https://github.com/asterinas/asterinas/pull/2125) * [Add the `ioprio_get` and `ioprio_set` system calls (dummy implementation)](https://github.com/asterinas/asterinas/pull/2126) * [Add the `epoll_pwait2` system call](https://github.com/asterinas/asterinas/pull/2123) * Enhanced system calls or features: * Processes: * [Add `FUTEX_WAKE_OP` support for the `futex` system call](https://github.com/asterinas/asterinas/pull/2146) * [Add `WSTOPPED` and `WCONTINUED` support to the `wait4` and `waitpid` system calls](https://github.com/asterinas/asterinas/pull/2166) * [Add more fields in `/proc/*/stat` and `/proc/*/status`](https://github.com/asterinas/asterinas/pull/2215) * File systems and I/O in general: * [Add a few more features for the `statx` system call](https://github.com/asterinas/asterinas/pull/2127) * [Fix partial writes and reads in writev and readv](https://github.com/asterinas/asterinas/pull/2230) * [Introduce `FsType` and `FsRegistry`](https://github.com/asterinas/asterinas/pull/2267) * Sockets and network: * [Enable UNIX sockets to send and receive file descriptors](https://github.com/asterinas/asterinas/pull/2176) * [Support `SO_PASSCRED` & `SCM_CREDENTIALS` & `SOCK_SEQPACKET` for UNIX sockets](https://github.com/asterinas/asterinas/pull/2268) * [Add `NETLINK_KOBJECT_UEVENT` support for netlink sockets (a partial implementation)](https://github.com/asterinas/asterinas/pull/2109) * [Support some missing socket options for UNIX stream sockets](https://github.com/asterinas/asterinas/pull/2192) * [Truncate netlink messages when the user-space buffer is full](https://github.com/asterinas/asterinas/pull/2155) * [Fix the networking address reusing behavior (`SO_REUSEADDR`)](https://github.com/asterinas/asterinas/pull/2277) * Security: * [Add basic cgroupfs implementation](https://github.com/asterinas/asterinas/pull/2121) * New device support: * [Add basic i8042 keyboard support](https://github.com/asterinas/asterinas/pull/2054) * Enhanced device support: * TTY * [Refactor the TTY abstraction to support multiple I/O devices correctly](https://github.com/asterinas/asterinas/pull/2108) * [Enhance the framebuffer console to support ANSI escape sequences](https://github.com/asterinas/asterinas/pull/2210) * Test infrastructure: * [Introduce the system call tests from LTP](https://github.com/asterinas/asterinas/pull/2053) * [Use Nix to build initramfs](https://github.com/asterinas/asterinas/pull/2101) ## OSTD & OSDK We have made the following key changes to OSTD: * CPU architectures: * x86-64: * [Refactor floating-point context management in context switching and signal handling](https://github.com/asterinas/asterinas/pull/2219) * [Use iret instead of sysret if the context is not clean](https://github.com/asterinas/asterinas/pull/2271) * [Don't treat APIC IDs as CPU IDs](https://github.com/asterinas/asterinas/pull/2091) * [Fix some CPUID problems and add support for AMD CPUs](https://github.com/asterinas/asterinas/pull/2273) * RISC-V: * [Add RISC-V timer support](https://github.com/asterinas/asterinas/pull/2044) * [Parse device tree for RISC-V ISA extensions](https://github.com/asterinas/asterinas/pull/2113) * LoongArch: * [Add the initial LoongArch support](https://github.com/asterinas/asterinas/pull/2260) * CPU: * [Add support for dynamically‌-allocated CPU-local objects](https://github.com/asterinas/asterinas/pull/2036) * [Require `T: Send` for `CpuLocal`](https://github.com/asterinas/asterinas/pull/2171) * Memory management: * [Adopt a two-phase locking scheme for page tables](https://github.com/asterinas/asterinas/pull/1948) * Trap handling: * [Create `IrqChip` abstraction](https://github.com/asterinas/asterinas/pull/2107) * Task and scheduling: * [Rewrite the Rust doc of OSTD's scheduling module](https://github.com/asterinas/asterinas/pull/2284) * [Fix the race between enabling IRQs and halting CPU](https://github.com/asterinas/asterinas/pull/2052) * Test infrastructure: * [Add CI to check documentation and publish API documentation to a self-host website](https://github.com/asterinas/asterinas/pull/2218) We have made the following key changes to OSDK: * [Add OSDK's code coverage feature](https://github.com/asterinas/asterinas/pull/2203) * [Support `cargo osdk test` for RISC-V](https://github.com/asterinas/asterinas/pull/2168) # Before 0.16.0 Release notes were not kept for versions prior to 0.16.0.