Error: "stage 2 init script (/mnt-root//init) not found" on QEMU armv7l

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1

I’m emulating an armv7l system on QEMU using this command (direct linux kernel boot), and encounter the error below. Any ideas how to fix this?

qemu-system-arm \
    -M xilinx-zynq-a9 \
    -serial /dev/null \
    -serial mon:stdio \
    -display none \
    -dtb ./dtbs/zynq-zc702.dtb \
    -kernel linux-6.1.55-zImage \
    -initrd initrd-linux-6.1.55-initrd \
    -drive file=nixos-sd-image-23.11pre-git-armv7l-linux.img,if=sd,format=raw \
    -append "console=ttyPS0 root=/dev/mmcblk0p2 rw rootfstype=ext4 rootwait"

…

<<< NixOS Stage 1 >>>

loading module dm_mod...
[    3.828440] device-mapper: ioctl: 4.47.0-ioctl (2022-07-28) initialised: dm-devel@redhat.com
running udev...
Starting systemd-udevd version 253.6
[    5.363616] macb e000b000.ethernet end0: renamed from eth0
kbd_mode: KDSKBMODE: Inappropriate ioctl for device
starting device mapper and LVM...
[    9.060726] random: crng init done
checking /dev/disk/by-label/NIXOS_SD...
fsck (busybox 1.36.1)
[fsck.ext4 (1) -- /mnt-root/] fsck.ext4 -a /dev/disk/by-label/NIXOS_SD
NIXOS_SD: recovering journal
NIXOS_SD: clean, 131122/146304 files, 563392/570399 blocks
mounting /dev/disk/by-label/NIXOS_SD on /...
[    9.373136] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Quota mode: none.
[    9.377930] EXT4-fs (mmcblk0p2): re-mounted. Quota mode: none.
stage 2 init script (/mnt-root//init) not found

An error occurred in stage 1 of the boot process, which must mount the
root filesystem on `/mnt-root' and then start stage 2.  Press one
of the following keys:

  r) to reboot immediately
  *) to ignore the error and continue
[   13.931508] amba f8801000.etb: deferred probe pending
[   13.931560] amba f8803000.tpiu: deferred probe pending
[   13.931602] amba f8804000.funnel: deferred probe pending
[   13.931649] amba f889c000.ptm: deferred probe pending
[   13.931718] amba f889d000.ptm: deferred probe pending
2

The sd image is designed to be booted by the u-boot. You can try something from here https://github.com/ARM-software/u-boot/blob/402465214395ed26d6fa72d9b6097c7adbf6a966/doc/README.qemu-arm
Alternatively, use full kernel cmdline from extlinux.conf file stored in the image

1 Like
3

Which u-boot should I generate, for the emulated device (e.g. zynq-zc702) or for qemu (e.g. qemu-arm)? Will have a look as well for the full kernel cmdline alternative.

4

The alternative method works! Will have to test for the u-boot method too.

Here is the new command:

qemu-system-arm \
    -M xilinx-zynq-a9 \
    -serial /dev/null \
    -serial mon:stdio \
    -display none \
    -dtb ./dtbs/zynq-zc702.dtb \
    -kernel linux-6.1.55-zImage \
    -initrd initrd-linux-6.1.55-initrd \
    -drive file=nixos-sd-image-23.11pre-git-armv7l-linux.img,if=sd,format=raw \
    -append "init=/nix/store/plk7w1mbd1x5vw9636511fmjdwv2jrbd-nixos-system-nixos-23.11pre-git/init console=ttyPS0,115200n8 loglevel=7"