== writer: 12-byte TPM-ish command to /dev/uafsim0 (blocks ~5s in transmit) ==
WRITER DONE rc=0
== firing detach (== kldunload tpm while transmit in flight) ==
hw.uafsim_detach: 0 -> 0
== detach returned; waiting for delayed effects (callout fires 500ms after writer returns) ==