[OE-core] [PATCH RFC 00/18] EFI boot partition improvements

[California Sullivan]

First, note that this is based on top of Haris' multiple kernels patch:
http://lists.openembedded.org/pipermail/openembedded-core/2017-November/144031.html

Currently, the boot partition of an EFI system is entirely controlled by
image creation. Either done entirely through wic, or one of the
bootloader bbclasses. This is rather bad since it makes it very
difficult to add additional items to the boot partition, such as
alternative kernels, bootloaders, or other utilities, and since its not
package controlled its hard to update.

The goal of these changes is to have the boot partition built through
packages instead. We accomplish this by installing everything to /boot,
and using the contents of /boot to create the partition. This required
changes to several bootloaders, the kernel recipe, one new
rootfs-postcommand to avoid data duplication, and a new .wks file to
make use of the new functionality.

Legacy hddimg, iso images, and wic images should be mostly unchanged,
and their functionality is preserved. The only change they received is
the kernel is now installed as ${KERNEL_IMAGETYPE} instead of hardcoded
as vmlinuz, and their bootloader configs have been updated to reflect
that.

This is still a WIP, but I wanted to get some eyes and feedback on it.
Here are some known issues that I've ran into, and am still working on:
* fs-uuid (DISK_SIGNATURE_UUID) seems to have issues when changing MACHINE
  types, and the image can get an old uuid when building from sstate
* init-install.sh hasn't been updated to support multiple kernels, and
  still uses hardcoded vmlinuz (broken)
* the boot partition is vfat, which doesn't support symlinks, so the
  symlink from the long kernel name to bzImage turns into a copy.

I fully expect this to take several iterations to get right, so please
any feedback is welcome.

Thanks,
Cal

California Sullivan (18):
  fs-uuid.bbclass: rewrite get_fs_uuid function
  image.bbclass: Add fs-uuid bbclass
  grub-efi.bbclass: split out configuration portion
  grub: create recipe for configuration
  grub-efi: install to /boot/
  grub-efi: if installed and EFI_PROVIDER, install as bootx64 or
    bootia32
  rootfs-postcommands: add rootfs postprocess command to avoid /boot/
    duplication
  packagegroup-core-boot: add bootloader to EFI systems
  live-vm-common.bbclass: Don't use vmlinuz or VM_DEFAULT_KERNEL
  grub-efi*.bbclass: don't reference vmlinuz
  wic: add wks file to make use of new bootfs functionality
  init-install-efi.sh: Update to support installing multiple kernels
  syslinux.bbclass: don't use vmlinuz
  systemd-boot.bbclass: break out configuration creation
  systemd: add systemd-bootconf recipe
  systemd-boot*.bbclass: Don't use vmlinuz
  systemd-boot: add package that installs to boot
  packagegroup-core-boot: add kernel for EFI systems

 meta/classes/fs-uuid.bbclass                       |  32 ++++--
 .../{grub-efi.bbclass => grub-efi-cfg.bbclass}     |  44 +-------
 meta/classes/grub-efi.bbclass                      | 124 +--------------------
 meta/classes/image.bbclass                         |   3 +
 meta/classes/live-vm-common.bbclass                |   9 +-
 meta/classes/rootfs-postcommands.bbclass           |  19 ++++
 meta/classes/syslinux.bbclass                      |   4 +-
 meta/classes/systemd-boot-cfg.bbclass              |  75 +++++++++++++
 meta/classes/systemd-boot.bbclass                  |  72 +-----------
 meta/recipes-bsp/grub/grub-bootconf_1.00.bb        |  30 +++++
 meta/recipes-bsp/grub/grub-efi_2.02.bb             |  41 +++++--
 .../initrdscripts/files/init-install-efi.sh        |  15 ++-
 .../packagegroups/packagegroup-core-boot.bb        |   3 +
 meta/recipes-core/systemd/systemd-boot_234.bb      |  28 ++++-
 meta/recipes-core/systemd/systemd-bootconf_1.00.bb |  31 ++++++
 scripts/lib/wic/canned-wks/efi-bootdisk.wks.in     |   6 +
 16 files changed, 269 insertions(+), 267 deletions(-)
 copy meta/classes/{grub-efi.bbclass => grub-efi-cfg.bbclass} (74%)
 create mode 100644 meta/classes/systemd-boot-cfg.bbclass
 create mode 100644 meta/recipes-bsp/grub/grub-bootconf_1.00.bb
 create mode 100644 meta/recipes-core/systemd/systemd-bootconf_1.00.bb
 create mode 100644 scripts/lib/wic/canned-wks/efi-bootdisk.wks.in

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2.14.3