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| author | SzuWei Lin <szuweilin@google.com> | 2022-11-08 01:37:32 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2022-11-08 01:37:32 +0000 |
| commit | 0e612c22dc561299594f040f9159e5cfea436a6e (patch) | |
| tree | a89d66a3f0b36b902084111a7a3796e4ec477438 | |
| parent | af74d9fd1926221b7178d4fbae0c7ee5c49ac334 (diff) | |
| parent | ca3b60361256cc97d839b2e235f78cc2f45d52d8 (diff) | |
| download | common-0e612c22dc561299594f040f9159e5cfea436a6e.tar.gz | |
Merge "Add content about support system_dlkm partition" am: 7572416973 am: ca3b603612
Original change: https://android-review.googlesource.com/c/device/generic/common/+/2286974
Change-Id: I4eb1602e963f96572eaf87abf9125105f3bd0758
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
| -rw-r--r-- | README.md | 31 |
1 files changed, 30 insertions, 1 deletions
@@ -3,7 +3,36 @@ This document introduces special GSI settings for facilitating xTS-on-GSI with a single image. -## Changes in runtime resource overlays (RRO) +### Support system_dlkm partition + +``` +[BoardConfigGsiCommon.mk] + +BOARD_USES_SYSTEM_DLKMIMAGE := true +BOARD_SYSTEM_DLKMIMAGE_FILE_SYSTEM_TYPE := ext4 +TARGET_COPY_OUT_SYSTEM_DLKM := system_dlkm + +[gsi_release.mk] + +PRODUCT_BUILD_SYSTEM_DLKM_IMAGE := false +``` + +Starting from Android 13, all devices must include a [system_dlkm partition]. +GSI enables system_dlkm to support the devices with system_dlkm partition, +and be compatible with old devices without a system_dlkm partition. + +With these configurations, `/system/system_dlkm` would not be created. +Instead, a `/system/lib/modules` -> `/system_dlkm/lib/modules` symlink is +created. + +For device without system_dlkm partition, the symlink would be dangling. +The dangling symlink shouldn't be followed anyway because the device doesn't +use system_dlkm. + +For device with system_dlkm, they can load modules via that path normally like +when they are using their original system image. + +[system_dlkm partition]: https://source.android.com/docs/core/architecture/bootloader/partitions/gki-partitions ### SystemUI overlays |