# kernel/

Phase-1 audit closed the "do we need a driver?" question: Tomeu
Vizoso's `rocket` driver is in mainline since Linux 6.18, and
boltzmann's `linux-rk3588-marfrit-A1` build (7.0.0-rc3-ARCH+)
already ships it as a module. See `docs/npu-mainline-status.md` for
the full audit.

Current contents:

```
kernel/
└── dt-overlays/
    └── rk3588-rosenblatt-npu-enable.dtso
        # Flips rknn_core_0/1/2 + rknn_mmu_0/1/2 to status="okay".
        # Do NOT apply on >4 GB-RAM hosts without IOMMU v1.0
        # mitigation (mem=4G or local discriminator-compat patches).
```

Anticipated next additions:

- `iommu/0001-iommu-rockchip-add-rk3568-iommu-v1-compatible.patch`
  — local carry of Midgy BALON's discriminator-compat patch when it
  appears upstream, plus the matching DT update for `rknn_mmu_*`.
  Drop when the upstream series lands.
- Patches against marfrit's `linux-rk3588-marfrit-*` branch only if
  we need fixes beyond what mainline rocket provides. Kept minimal
  per the "mainline-clean from day 1" rule.

Patch handling routes through the `kernel-agent` subagent (per
`feedback_agent_routing.md`); board / host wiring lives in
`fleet/boltzmann.yaml`.