Robert Allan JamesandClaude Sonnet 5
d686f28853
Closes the gap block_subsystem.c needs before any of 2h's real work (blkio_usb.c, attach wiring, hot-detach) can start: this driver is fully async/polled with no way for a synchronous caller (blkio_read()/ blkio_info() etc.) to get a result back. xhci_bot_wait_for_idle() is a bounded busy-wait over xhci_poll_events() -- MUST be called only from outside xhci_poll_events()'s own call frame, never from within it or a next_action dispatch (recursion into live Event Ring/ERDP processing, same class of hazard already documented for doorbell rings in this driver). xhci_get_dev() exposes the module-static device handle to outside callers that didn't observe the original hotplug event. SCSI READ CAPACITY(10) (opcode 0x25) is the other half -- nothing could learn a device's block size/capacity before this. First attempt sent it bare and hit the classic first-command UNIT ATTENTION (CSW FAILED); fixed with the same TUR-guard pattern READ(10) already used, generalized via a new bot_tur_chain_target field so TEST UNIT READY's PASS handling can chain into either command. bot_data_buf grown 512->1024 bytes (one Forth block = two 512-byte SCSI blocks, per block_subsystem.c's own 1KiB-unit convention). Verified live via a temporary probe (hot-attached disk/usb-thumbdrive- test.img via QMP, reverted after capture): TUR-guarded READ CAPACITY10 correctly reported last LBA=0x1ffff, block size=0x200 -- exactly 64MiB, matching the test image byte for byte -- followed by a TUR-guarded 1024-byte/2-block READ10, both PASS. All three architectures re-verified clean, probe-free boot to ok> on the reverted tree. FABRIC-2.md Section X 2h updated with the writeup; the blkio_usb.c backend itself is next. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CXjAPTEKrgY2Mrk25KoLDn
experiments/
Design of Experiments (DoE) campaign data and analysis for the LithosAnanke kernel.
bare_metal/— the bare-metal DoE experiment: blind full-factorial 2⁴ runs measuring the L8 Jacquard mode selector's effect on the Steady-State Machine across amd64/aarch64/riscv64. Seeexperiments/bare_metal/README.mdfor the full directory layout (runs/,latest/,analysis/{charts,tables,report}).
Hosted-VM DoE campaigns (factorial/heartbeat/ablation studies) live under
docs/working/experiments/ instead — this top-level directory is
specifically the kernel/bare-metal side.