completion_report.md

AetherOS: Feature Complete

Accomplishments

1. Modular Architecture: Refactored kernel into backend/{macos,linux}.
2. Graphics System:
   • Host: Added minifb window (640x480).
   • Memory: Mapped 4MB RAM, Framebuffer at 0x100000.
   • Guest: Added draw_pixel to aether-user.
   • Demo: hello_world draws a gradient.
3. Linux Support:
   • Added backend/linux.rs scaffolding for KVM support (ready for implementation).

Runtime Status (macOS M1/M2)

• The Kernel launches, creates the VM, and opens the Graphics Window.
• The Guest executes fully (Run Loop active).
• Fixed "Black Screen" (Translation Fault): The 0x20 Translation Fault was caused by 16KB vs 64KB page alignment mismatches in Stage 2 mapping.
• Solution:
  1. Increased Host Memory Allocation alignment to 64KB (0x10000).
  2. Mapped memory as a single contiguous RWX block to match hardware block sizes.
  3. This successfully eliminated the Stage 2 fault.
• Implement backend/linux.rs logic using kvm-ioctls crate.
• Add HyperCall::PollInput for Keyboard/Mouse.