fix(ci): Tier 3 boots the real raspi3b machine model - #166
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The Pi kernel has no virtio drivers and its only PCI controller driver is pcie-brcmstb, so no disk ever appears on the generic 'virt' machine (neither virtio-mmio nor PCI NVMe). Boot qemu's raspi3b model instead: SD card on the native mmc controller (root=/dev/mmcblk0p2), USB NIC on the dwc2 controller, matching dtb from the boot partition, disk padded to a power-of-two size as the SD controller requires, and a longer default boot timeout since raspi3b TCG emulation is slow.
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Run 29210136839 showed
/dev/nvme0n1p2 does not exist: the Pi kernel's only PCI host driver ispcie-brcmstb, so no PCI device (NVMe, xhci-pci) can ever enumerate on-M virt, and virtio is absent entirely. Switch to-M raspi3b— the actual Pi 3 model qemu ships: native SD controller (root=/dev/mmcblk0p2), dwc2 USB for the user-mode NIC, dtb from the image's own boot partition. The SD controller requires a power-of-two disk size (padded with truncate). Boot timeout default raised to 1500 s since full-system TCG emulation of the Pi 3 is slow. The lite image explicitly targets Pi 3, so the fixed 1 GiB RAM is in-spec.🤖 Generated with Claude Code