system_dlkm and vendor_dlkm can be ext4 or erofs images
as these are supported read only filesystem in platform
builds.

Add an option to choose between ext4/erofs for these
partitions for the kernel's development only images to
match patform choices with ext4 as the default if choice
is not provided.

Choice will be passed as environemental variables to build_utils.sh:
SYSTEM_DLKM_FS_TYPE=["ext4" | "erofs"] for build_system_dlkm_image
VENDOR_DLKM_FS_TYPE=["ext4" | "erofs"] for build_vendor_dlkm_image

Bug: 261617174
Bug: 232430739
Test: TH
Change-Id: I4a37e9d0116bb4b2f38fc119011a441d7c73e9f7
Signed-off-by: Ramji Jiyani <ramjiyani@google.com>

* This is in favor of declaring the setup using Kleaf.
* This should have a lower impact as in both cases the
 default is always `//tools/mkbootimg:mkbootimg.py`

Bug: 260776236
Change-Id: I462894827e8b3fef8bbb1f9a23b35eb43e475cdf
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>

Building the boot image does not necessary require
the existence of initramfs.

Test: TH
Bug: 260031024
Change-Id: I06f3cab03066009c5d4ccad30392e5b2dfb8d858

Bug: 260012551
Change-Id: Ie6ebe4f3c239eb43b8565973979d07c43e1a647a
Signed-off-by: Wang Chen <wangchen20@iscas.ac.cn>
Signed-off-by: Alistair Delva <adelva@google.com>

* For backwards compatibility, options provided trough
  `kernel_image` rule will take precedence over the
  ones specified in build.config.

Bug: 236012223
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>
Change-Id: I6f26ee12ffd1e9198fdeef4f794780de2188cc64

* This is so kleaf support natively the following configs:
  * LZ4_RAMDISK
  * LZ4_RAMDISK_COMPRESS_ARGS

* The options are still falling back to the config values.

Bug: 236012223
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>
Change-Id: Iac60252b368da1f06ef3b49b3fb372dd729e9aea

* Buildifier provides linter recommendations when
 `--lint=warn` is used, so adding the ones for
 these  files before working with them so the
 cleanup changes are separated from the actual
 changes.

Bug: 236012223
Bug: 252888476
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>
Change-Id: I5d1c5a8bfd99d2efbe8f32420225507ac8296d31

This passes things like visibility and tags to internal targets.

Test: TH
Bug: 244786402

Change-Id: I28a33f7d1351d031fdc04336f6077a9bf3023529

vendor_kernel_boot.img would leave empty in the field of bootconfig.
Only copy vendor-bootconfig.img when building vendor_boot.img to avoid
building error.

Bug: 236355852
Signed-off-by: Lucas Wei <lucaswei@google.com>
Change-Id: I3569568801e953d52285640109a18e61714faaaa

system_dlkm_image produces staging_archive and modules.load
files. Also download them and put them as part of distribution
when building against downloaded prebuilts.

With system_dlkm_staging_archive.tar.gz from GKI
piped to the device's system_dlkm rule, instead
of creating the staging directory, unarchive the archive
and build system_dlkm from there.

As part of this change, kernel_images now also
accept these arguments:
- system_dlkm_modules_list
- system_dlkm_modules_blocklist
- system_dlkm_props

... which corresponds to the upper-case version of the build configs,
respectively. Their semantics are the same as the build configs.
Unlike vendor_dlkm_*:
- system_dlkm_modules_list falls back to modules_list if not set
- system_dlkm_modules_blocklist falls back to modules_blocklist if not set

Test: build slider_images_system_dlkm_image with build_system_dlkm=True
Bug: 233401974
Bug: 238786592

Change-Id: Ie9a2073d571b23eee58764ef9ced0976e5fa9622
Signed-off-by: Yifan Hong <elsk@google.com>

Unlike MODULES_OPTIONS in build.sh, modules_options in
Kleaf points to a file that contains the lines.

Fix comments and build rules that previously assume
it contains strings.

Test: bazel test //common:kernel_aarch64_tests
Fixes: 241162984
Change-Id: Ie3ab2544f91cbcec55e5af390fc06eba400add14

The filesystem format is an implementation detail.

Test: none
Change-Id: I241b038760b6d5bdb9104f0282cadb601a500110

After we supporting build vendor_kernel_boot image for kernel
artifacts, we should also update file name of *.modules.load
with its related image name.

Bug: 234554094
Test: TH
Change-Id: Ia78f318bfe7a203046ca479c92d4f26947b09402
Signed-off-by: Yifan Hong <elsk@google.com>

This makes kernel.bzl smaller.

Test: TH
Test: bazel build //common:kernel_aarch64_dist //gs/google-modules/soc-modules:slider_dist --nobuild
Test: bazel build //build/kernel/kleaf:docs
Bug: 233156052
Change-Id: I28ba7ca430070b57267079e24ebe0e1477f0d9fc
Signed-off-by: Yifan Hong <elsk@google.com>