[isar-cip-core][PATCH v2 0/6] Add support for EROFS

[Jan Kiszka <jan.kiszka@siemens.com>]

Changes in v2:
- update cip-kernel-config revision further to support non-x86 qemu targets

EROFS is a read-only file system that can act as alternative to squashfs
that we so far use for our A/B OTA update setups. It can perform faster
during runtime but may come with larger storage demand. See [1] for some
comparison.

We just enabled support for it in our 6.1 defconfigs, and this series now
enable CIP core to switch from squashfs to EROFS when requested.

Jan

[1] https://sigma-star.at/blog/2022/07/squashfs-erofs

Jan Kiszka (6):
  Make the read-only rootfs type configurable
  initramfs-crypt-hook: Prepare for EROFS as alternative
  Add initramfs-erofs-hook
  Introduce class for generating EROFS images
  linux-cip: Update cip-kernel-config revision
  kas: Add option for selecting read-only rootfs type

 Kconfig                                       | 16 +++++++++
 classes/erofs.bbclass                         | 34 +++++++++++++++++++
 classes/swupdate.bbclass                      |  3 +-
 classes/verity.bbclass                        |  2 +-
 conf/distro/cip-core-common.inc               |  4 ++-
 conf/layer.conf                               |  2 +-
 kas/opt/erofs.yml                             | 16 +++++++++
 kas/opt/swupdate.yml                          |  8 ++---
 .../files/encrypt_partition.script            |  2 +-
 ...ook_0.2.bb => initramfs-crypt-hook_0.3.bb} |  0
 .../initramfs-erofs-hook/files/erofs.hook     | 25 ++++++++++++++
 .../initramfs-erofs-hook_0.1.bb               | 24 +++++++++++++
 recipes-kernel/linux/cip-kernel-config.inc    |  2 +-
 wic/bbb-efibootguard.wks.in                   |  2 +-
 wic/hihope-rzg2m-efibootguard.wks.in          |  2 +-
 wic/qemu-arm64-efibootguard.wks.in            |  2 +-
 wic/qemu-riscv64-efibootguard.wks.in          |  2 +-
 wic/x86-uefi-efibootguard.wks.in              |  2 +-
 18 files changed, 133 insertions(+), 15 deletions(-)
 create mode 100644 classes/erofs.bbclass
 create mode 100644 kas/opt/erofs.yml
 rename recipes-initramfs/initramfs-crypt-hook/{initramfs-crypt-hook_0.2.bb => initramfs-crypt-hook_0.3.bb} (100%)
 create mode 100644 recipes-initramfs/initramfs-erofs-hook/files/erofs.hook
 create mode 100644 recipes-initramfs/initramfs-erofs-hook/initramfs-erofs-hook_0.1.bb

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2.43.0