[Bug 2104572] Re: Booting the daily noble RISC-V installer image fails

[Adriano Cordova Fedeli]

** Merge proposal linked:
   https://code.launchpad.net/~adrianoco/ubuntu/+source/cd-boot-images-riscv64/+git/cd-boot-images-riscv64/+merge/483536

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https://bugs.launchpad.net/bugs/2104572

Title:
  Booting the daily noble RISC-V installer image fails

Status in cd-boot-images-riscv64 package in Ubuntu:
  New
Status in u-boot package in Ubuntu:
  Invalid
Status in cd-boot-images-riscv64 source package in Noble:
  New
Status in u-boot source package in Noble:
  Invalid

Bug description:
  [ Impact ]

   * Grub does not properly set the root= variable to identify the
  rootfs.

  [ Test Plan ]

   * I have downloaded
     https://cdimage.ubuntu.com/ubuntu-server/daily-live/current/plucky-live- 
     server-riscv64.iso
     https://cdimage.ubuntu.com/ubuntu-server/noble/daily-live/current/noble-live- 
     server-riscv64.iso
     and tried to boot these on a Plucky system.

     Booting the noble image with

     qemu-system-riscv64 -machine virt -m 4G -smp cpus=2 -nographic \
      -kernel /usr/lib/u-boot/qemu-riscv64_smode/u-boot.bin \
      -netdev user,id=net0 \
      -device virtio-net-device,netdev=net0 \
      -drive file=noble-live-server-riscv64.iso,format=raw,if=virtio \
      -drive file=disk,format=raw,if=virtio \
      -device virtio-rng-pc

     ends up in the GRUB rescue console:

     grub> ls $root
     error: invalid file name `hd0,gpt2'.
     grub> ls ($root)/
     efi/ dtb/ ubootefi.var
     grub>

     Same problem with EDK II using

     qemu-system-riscv64 -machine virt -m 4G -smp cpus=2 -nographic \
      -drive if=pflash,format=raw,unit=0,file=/usr/share/qemu-efi- 
     riscv64/RISCV_VIRT_CODE.fd,readonly=on \
      -drive if=pflash,format=raw,unit=1,file=RISCV_VIRT_VARS.fd \
      -netdev user,id=net0 \
      -device virtio-net-device,netdev=net0 \
      -drive file=disk,format=raw,if=virtio \
      -device virtio-blk,drive=ISO,bootindex=1 \
      -drive file=noble-live-server-riscv64.iso,if=none,id=ISO \
      -device virtio-rng-pci

     I don't experience any problem with the Plucky image.

     When I emulate a CD-ROM it works

     qemu-system-riscv64 -machine virt -m 4G -smp cpus=2 -nographic \
      -drive if=pflash,format=raw,unit=0,file=/usr/share/qemu-efi- 
     riscv64/RISCV_VIRT_CODE.fd,readonly=on \
      -drive if=pflash,format=raw,unit=1,file=RISCV_VIRT_VARS.fd \
      -netdev user,id=net0 \
      -device virtio-net-device,netdev=net0 \
      -drive file=disk,format=raw,if=virtio \
      -device driver=virtio-scsi-pci,id=scsi0 \
      -drive if=none,file=noble-live-server- 
     riscv64.iso,format=raw,readonly=on,id=CDROM \
      -device driver=scsi-cd,bus=scsi0.0,drive=CDROM,bootindex=1 \
      -device virtio-rng-pci

     So it seems our current Noble ISO is not properly set up to be used a disk 
     image.

  [ Where problems could occur ]

   * The rootfs should be the only filesystem in the image containing a file named 
     /.disk/info. If not, we risk loading an incorrect filesystem.

  [ Other Info ]

   * n/a

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