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AetherOS Development Roadmap

Phase 1: Core Functionality (Current → Q1 2025)

1.1 TTY / Text Console ⏳

  • Embed 8x16 bitmap font (VGA-style) into aether-user
  • Implement Console struct with cursor position and scrolling
  • Rewrite print!() to render text directly to framebuffer
  • Support basic ANSI escape codes (colors, cursor movement)

1.2 Input Handling ⏳

  • Define input hypercalls (AETHER_KEY_EVENT, AETHER_MOUSE_EVENT)
  • Implement keyboard event queue in kernel
  • Forward minifb keyboard events to guest via shared memory
  • Add read_key() and poll_events() to guest SDK

1.3 Hypercall Expansion ⏳

  • AETHER_GET_TIME - System clock access
  • AETHER_SLEEP - Guest sleep/yield
  • AETHER_ALLOC - Dynamic memory allocation
  • AETHER_EXIT - Clean guest termination

Phase 2: Platform Backends (Q1-Q2 2025)

2.1 Linux KVM Backend ⏳

  • Implement /dev/kvm IOCTLs in linux.rs
  • Create VM, vCPU, and memory regions
  • Handle VM exits and hypercall dispatch
  • Test on x86_64 and aarch64 Linux

2.2 Windows WHP Backend ⏳

  • Use windows-rs crate for WHP bindings
  • Implement WHvCreatePartition, WHvSetupPartition
  • Memory mapping and vCPU execution
  • Test on Windows 11 with Hyper-V enabled

2.3 BSD Family Backends ⏳

  • FreeBSD bhyve implementation
  • NetBSD NVMM implementation
  • OpenBSD vmm(4) implementation (requires nightly Rust)

Phase 3: Ecosystem & Compatibility (Q2-Q3 2025)

3.1 WASM Runtime Integration ⏳

  • Embed wasmi interpreter in kernel
  • Define WASI-like imports for AetherOS
  • Create aether-wasm guest app loader
  • Support wasm32-unknown-unknown binaries

3.2 Linux ABI Shim ⏳

  • ELF loader for Linux binaries
  • Syscall translation layer (open, read, write, mmap)
  • Basic /proc and /dev/null emulation
  • Run simple CLI tools (busybox)

3.3 Networking ⏳

  • VirtIO-net device emulation
  • Simple TCP/IP stack in guest (smoltcp)
  • AETHER_NET_SEND / AETHER_NET_RECV hypercalls

Phase 4: Android Native (Q3-Q4 2025)

4.1 Direct Hardware Access ⏳

  • DRM/KMS framebuffer backend (bypass minifb)
  • /dev/input/eventX raw input handling
  • SELinux policy module for AetherOS service

4.2 Android Integration ⏳

  • Magisk module for easy installation
  • init.rc service definition
  • HIDL/AIDL GPU HAL client (if needed)
  • Run as PID 1 replacement (advanced)

Phase 5: Hybrid Kernel (2025+)

5.1 Bare Metal Bootstrap ⏳

  • UEFI bootloader (uefi-rs)
  • Minimal aarch64/x86_64 kernel entry
  • Page table setup and exception handlers
  • Serial console output (UART)

5.2 Hardware Abstraction ⏳

  • VirtIO device drivers (GPU, Input, Net, Block)
  • Timer and interrupt controller (GIC/APIC)
  • Run in QEMU first, real hardware later

5.3 Driver Strategy ⏳

  • Option A: Linux driver wrapper (like Fuchsia)
  • Option B: VirtIO-only (QEMU/Cloud focus)
  • Option C: Libhybris for Android blobs
  • Decision deferred until Phase 4 complete

Priority Order

Priority Phase Effort Impact
🔴 HIGH 1.1 TTY Console 1 week Enables debugging, demo-ready
🔴 HIGH 1.2 Input 1 week Interactive applications
🟡 MED 2.1 Linux KVM 2 weeks Server deployment
🟡 MED 3.1 WASM 2 weeks App ecosystem
🟢 LOW 4.x Android 1 month Mobile platform
🔵 FUTURE 5.x Hybrid Kernel 3+ months Full independence

Current Status

✅ Completed:

  • Hypervisor.framework macOS backend
  • 640x480 framebuffer graphics
  • Universal ABI with hypercalls
  • 8-platform CI matrix
  • Cross-compilation for BSD family

⏳ In Progress:

  • (Ready to start Phase 1.1)