EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·10d ago·5 min read
The forgetful CPU (Linux on M4)
TL;DR
Linux was successfully booted on the M4 Mac mini, overcoming significant challenges related to the new Secure Page Table Monitor (SPTM) and CPU register issues. This achievement allows for broader support of Linux on Apple Silicon devices.
✦ Why It Matters
Consider supporting open-source efforts like Asahi Linux to enhance Linux compatibility on Apple Silicon.
Key Takeaways
- Explore the m1n1 hypervisor for custom booting on Apple Silicon.
- Investigate the implications of SPTM on Linux kernel development.
- Contribute to open-source projects like Asahi Linux for broader support.
- Utilize debug techniques to troubleshoot boot issues in embedded systems.
How It Works
The author modified the Linux kernel to create a 1:1 mapping for memory-mapped I/O, allowing proper access to UART during boot. By replacing problematic WFI instructions with no-ops, the kernel was able to boot successfully with all cores enabled, addressing a critical issue in power management.