This section introduces the layers included in the Qualcomm manifest. This manifest includes all the layers required to reproduce the reference build.
Layer stack overview
The following figure shows the layers included in the Qualcomm Linux release:
Figure: Qualcomm Linux metadata layers
Qualcomm-maintained layers
The following layers are maintained by Qualcomm and are specific to Qualcomm Linux development kits:
| Metadata layer | Description |
|---|
meta-qcom | Contains recipes that build software components for Qualcomm development kits and provides software features applicable to Qualcomm SoCs. This is the primary BSP layer. |
meta-qcom-distro | Provides a reference distribution configuration for Qualcomm development kits. Image recipes and package groups are defined in this layer. |
meta-qcom-extras | Optional metadata layer for registered users. This layer enables source compilation of select components, which are otherwise provided as binaries in meta-qcom. |
| Metadata layer | Description |
|---|
openembedded-core | Provides build tools and recipe files for various software components needed for an embedded OS distribution. For more information, see openembedded-core. |
meta-openembedded | Collection of layers for the OpenEmbedded build system. For more information, see meta-openembedded. |
meta-virtualization | Contains packages for constructing OpenEmbedded virtualized solutions and virtualization stacks, such as Docker and Kubernetes. For more information, see meta-virtualization. |
meta-selinux | Enables SELinux support. This layer includes reference SELinux policies and provides necessary tooling. To enable SELinux for Qualcomm Linux, set the variable DEFAULT_ENFORCING to enforcing in conf/distro/include/qcom-distro-selinux.inc. For more information, see meta-selinux. |
meta-security | Provides security tools and hardening tools for Qualcomm Linux kernels and libraries for implementing security mechanisms. For more information, see meta-security. |
meta-updater | Enables over-the-air updates (OTA) with OSTree. OSTree is a tool for atomic full file system upgrades with rollback capability. For more information, see meta-updater. |
When to use which layer
| Goal | Layer to modify |
|---|
| Add or change machine configuration | meta-qcom |
| Change distribution features or add image recipes | meta-qcom-distro |
| Source-compile proprietary components (registered users only) | meta-qcom-extras |
| Add virtualization or container support | meta-virtualization |
| Enable SELinux | meta-selinux |
| Enable OTA updates | meta-updater |
| Add a third-party layer | See Add third-party layers to the workspace |
Next steps
