BFE EngineeringandClaude Fable 5
bf3c93cf85
The third simulator (deliberately not named "sim"): a QEMU -M virt VM that boots the real 6.18.46 kernel and enters at -kernel zImage — everything below (BootROM/idblock/U-Boot/real BCB A/B selection) is closed blobs + mask ROM and is explicitly out of scope. - qemu/mkinitramfs.sh: pinned static busybox (sha256 fail-closed) + rootfs/ - qemu/mkimage.sh: unprivileged sparse disk image with the device's canonical 12-partition blkdevparts A/B layout (vda == mmcblk0 mapping) - qemu/rootfs/: stage-1 init (by-name symlinks from PARTNAME uevents, whole-token warden.slot= parse, switch_root) + stage-2 init (userdata/oem mounts, slirp networking, payload daemon start) - qemu/run.sh: runner with --slot/--rtc/--watchdog/--rs485/--qmp/--display - qemu/configs/virt.fragment + WARDEN_KCONFIG_FRAGMENT hook in build/build-kernel.sh (canonical RV1106 build untouched when unset): adds PCI, pci-serial, i6300esb watchdog, WireGuard, virtio-gpu/input - qemu/tests/boot-smoke.sh: sentinel-asserting boot test Verified on QEMU 10.0.11: canonical zImage boots -M virt unmodified (the feared DEBUG_UNCOMPRESS decompressor hang does not exist in 6.18); full stack boots both slots; 12 by-name symlinks; userdata persists across reboot; -rtc base=2021-01-01 reproduces the no-RTC wrong-clock class. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
37 lines
1.5 KiB
Plaintext
37 lines
1.5 KiB
Plaintext
# QEMU -M virt kernel variant — merged onto build/warden_defconfig via
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# WARDEN_KCONFIG_FRAGMENT (see build/build-kernel.sh). The RV1106 zImage stays
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# canonical and byte-identical when the variable is unset.
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#
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# The canonical zImage already BOOTS on -M virt as-is (verified 2026-08-29:
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# the multi_v7 heritage supplies ARCH_VIRT + the virtio set, and DEBUG_LL's
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# hardcoded RV1106 UART is inert as long as `earlyprintk` is never passed on
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# the cmdline). This fragment therefore only ADDS what the device-sim
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# scenarios need beyond the canonical config.
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# -M virt exposes exactly one PL011 (probed: QEMU 10 dtb has a single
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# pl011@9000000); every additional device below rides the machine's PCIe
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# (ECAM "host generic") root.
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CONFIG_PCI=y
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CONFIG_PCI_HOST_GENERIC=y
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# Second UART for the RS485/Modbus bridge: -device pci-serial (16550-class,
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# shows up as ttyS0; stage-2 init aliases it to the device's /dev/ttyS4).
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CONFIG_SERIAL_8250_PCI=y
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# /dev/watchdog for flared's watchdog_loop() — untestable on both existing
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# sims. i6300esb is the watchdog QEMU offers on arm virt (PCI device):
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# -device i6300esb -action watchdog=reset.
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CONFIG_WATCHDOG=y
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CONFIG_I6300ESB_WDT=y
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# wg0 mesh scenarios (flared owns identity, the panel shells out `wg`).
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CONFIG_WIREGUARD=y
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# Display + touch: virtio-gpu scanout with fbdev emulation (the VM UI build
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# uses LVGL's fbdev backend — no libdrm needed in the guest), virtio-tablet
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# for absolute-coordinate touch injection via QMP.
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CONFIG_FB=y
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CONFIG_DRM_VIRTIO_GPU=y
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CONFIG_DRM_FBDEV_EMULATION=y
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CONFIG_VIRTIO_INPUT=y
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