Topic

#asahi-linux

Latest developer news about asahi-linux, summarized in Vietnamese by AI.

Phoronix0 Hot2 min4 h ago

Linux 7.4 To Introduce Initial Device Trees For Apple M4, A18 Pro For MacBook Neo

Asahi Linux developer Sven Peter has submitted pull requests upstreaming initial Device Tree support for Apple M4-based Macs and the A18 Pro-powered MacBook Neo, targeting the Linux 7.4 merge window. The support covers only minimal hardware blocks shared with M3 (CPU cores, interrupt controller, watchdog, serial, pin controller, i2c, frame-buffer) and is enough to boot but not for full usability, with GPU and other functionality left for future kernel versions. A second pull request adds shared GPIO support and RTKit crashlog support for older 32-bit co-processors.

#linux #asahi-linux Source

Lobsters0 Hot9 min5 h ago

The forgetful CPU (Linux on M4)

A developer recounts the lengthy reverse-engineering effort to boot mainline Linux on Apple's M4 Mac mini for the Asahi Linux project. The M4 introduced SPTM hardening that broke the previous MMIO-tracing bringup method, forcing a from-scratch approach using println-style debugging, device tree hacking, and register-level investigation. Key obstacles included locked GXF and RVBAR registers, missing UART memory mappings after MMU init, a crash tied to a virtualization register, and a broken WFI instruction that zeroed CPU registers on wake, violating the ARM64 spec. The WFI issue was eventually solved with a new kernel bootarg (proposed by Will Deacon) that has since been merged into mainline Linux and m1n1, enabling Linux to boot on M4 with all cores active, including M4 Pro, M4 Max, and M5 variants.

#linux #hardware #reverse-engineering

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