Robert Allan JamesandClaude Sonnet 5
b301317902
Two independent bugs that together caused a reliable hotplug wedge: reusing an xHCI port for a second identity right after an unclean detach of a first would leave no further hotplug events reaching the guest at all. Bug 1 (xhci.c/xhci_driver.h): the xHCI driver never drove PORTSC.PR -- a known, named gap since Milestone 2e (the code's own comment flagged it, PORTSC_PR/PRC were defined but never referenced). A port's first connect each boot reads PED already set, so skipping the reset happened to work; a second device on the same port after a prior disconnect reads PED clear, and Address Device reliably failed without an explicit reset cycle. New XHCI_CONN_AWAIT_PORT_RESET state drives PR and waits for PED to read set before proceeding to Enable Slot. Bug 2 (capsule_wirebind.c): capsule_wirebind_eject()/unclean_detach() compared g_repl_active_vm against the *user* VM's pointer (g_wirebind_attached_vm_id tracks that one, not the console VM) -- never equal, since USE/g_repl_active_vm always points at the console VM. The guard never fired and the console VM was never killed at all, only orphaned -- paired to a dead user VM but still the REPL's active session. New wirebind_teardown_console() helper resolves and tears down the console VM by its own tracked bare username. Verified live on amd64: the exact repro (identity 01 on port 2, unclean detach, identity 02 on the same port immediately after) -- previously wedged with "xhci: address device failed" and no further hotplug activity; now attaches cleanly and fast, both VMs' KILL messages appear, console is immediately interactive on the new identity. Three-arch clean qemu acceptance passed, all clean on the first attempt. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014Ec88YKxxhZGG1RNnune78
include/starkernel/
Headers for LithosAnanke, the bare-metal UEFI kernel (src/starkernel/).
Built only via Makefile.starkernel; gated by __STARKERNEL__ when shared
with hosted code.
uefi.h— UEFI protocol/type definitions consumed by the loader.elf64.h,elf_loader.h— ELF64 parsing and kernel-image loading.boot_info_offsets.h— struct-offset constants shared between the assembly bootstrap and the C boot path.arch.h,apic.h,timer.h— architecture init, APIC interrupt controller, timer (TSC/HPET/APIC, 100 Hz heartbeat).console.h,framebuffer.h,vt100.h— UART 16550 console, framebuffer driver, and VT100 terminal emulation over the framebuffer.pmm.h,vmm.h,kmalloc.h— physical memory manager (bitmap allocator), 4-level x86_64 paging, kernel heap allocator.pci.h,virtio_blk.h— PCI enumeration and the VirtIO block device driver (disk backend for the kernel block subsystem).capsule.h,capsule_birth.h,capsule_loader.h,capsule_run.h,capsule_vm_physics.h,capsule_generated.h— capsule system types, birth protocol, physics-runtime capsule bindings, and the build-time- generated capsule directory (seetools/mkcapsule.c).kernel_args.h,cmdline.h— boot-time kernel argument parsing (starforth.cfg/ command line).repl.h— kernel REPL.log.h,doe_log.h— kernel logging and DoE metrics logging.q48_16.h— kernel-build copy of Q48.16 fixed-point arithmetic.xxhash64.h— content-addressing hash used for capsule IDs.hal_memory.h— hardware-abstraction-layer memory interface.
Subdirectories:
hal/— top-level hardware-abstraction-layer interface.vm/— kernel VM subsystem headers (capsule arena, parity logging, bootstrap wiring).freestanding/— minimal libc-shim headers (assert.h,ctype.h,errno.h,inttypes.h,math.h,sched.h,signal.h,stdio.h,stdlib.h,string.h,time.h,sys/time.h,sys/types.h) for building shared VM code in the freestanding kernel environment, where no real libc is available.