Module diagnostics

Diagnostic utilities for PCI debugging.

Structs

• PciDiagnostic
  Full diagnostic: returns structured info about PCI state.

Functions

• probe_all_bus0_slots
  Scan ALL device slots on bus 0 to find VirtIO devices. Returns raw vendor/device values (0xFFFF = no device).
• probe_common_virtio_locations
  Scan specific device locations where QEMU typically places VirtIO. Returns raw vendor/device values (0xFFFF = no device).
• raw_io_test
  Test I/O port access using standalone assembly. Returns (cf8_readback, host_bridge_id).
• read_host_bridge
  Read the host bridge (bus 0, dev 0, func 0) vendor/device ID. This should ALWAYS return a valid device (the host bridge) if PCI works. Returns (vendor_id, device_id).
• run_diagnostics
  Run full PCI diagnostics.