The qemu/ device sim answered the first question off-board: the same
kernel family under -M virt gives musl vDSO rate ratio 0.99963 — the
generic 6.18 armv7 vDSO is correct, so the board symptom is RV1106
register state (CNTFRQ/CNTVOFF, firmware-owned, secure-world boot chain).
- qemu/tests/clockprobe: interval-based musl probe separating RATE error
(CNTFRQ) from boot OFFSET (CNTVOFF) — the original single absolute
sample cannot distinguish them.
- qemu/tests/clock-sanity.sh: VM regression guard asserting the vDSO rate
within 1% (PASSES: 1.00026); cross-builds the probe and stages it as
payload itself.
- kernel/rv1106-enablement/timer/PLAN.md: the DT fix
(arm,cpu-registers-not-fw-configured + measured clock-frequency on the
board dts) gated on the two bench measurements; c8a3 is currently
physically dark, needs hands at the bench.
- clockprobe joins the CI test loop.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
