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feat: U2 UTRW slow path real branches

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- slow_path.c: KEY_MISS -> PCKC re-derive (retry OK); EPOCH -> refresh cap epoch via out_cap (retry OK); STALE_CAP permanent; MAC_FAILED/POISONED -> PCKC invalidate + DRR fault report; RETRY passthrough
- status.h: add UTSM_ERR_MAC_FAILED (-11); utrw.h: slow path takes cap/rights/offset/len/reason + out_cap
- selftest: EPOCH refresh + KEY_MISS re-derive + POISONED passthrough coverage, full SELFTEST PASS in QEMU (.build_tmp/qemu_serial_u2slowpath.log)
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Linehu
2026-10-02 14:29:28 +08:00
parent 1eaf1aedf8
commit b76e8f1556
16 changed files with 187 additions and 13 deletions
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docs/TASKBOARD.md
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@@ -14,7 +14,7 @@
## 🗝️ 二期：仪式（UTSM/UTRW）
- [x] U1 UTSM 元数据区 / UUID 调谐表
- [ ] U2 UTRW Slow Path 真分支（Fast path ✅；slow_path.c 现为 stub）
- [x] U2 UTRW Slow Path 真分支（EPOCH/KEY_MISS 恢复 + MAC_FAILED/POISONED→DRR；selftest PASS）
- [ ] U3 `@sealed` 段可选标记（链接脚本 `__sealed` section）
- [ ] U4 密文页 dump 工具（明文/密文对照命令）
- [ ] U5 UTSM selftest 全覆盖（修 chacha20 KAT 间歇 FAIL，覆盖率 ≥70%）