# SPDX-License-Identifier: GPL-2.0
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menu "Android"
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config ANDROID
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bool "Android Drivers"
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help
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Enable support for various drivers needed on the Android platform
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if ANDROID
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config ANDROID_BINDER_IPC
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bool "Android Binder IPC Driver"
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depends on MMU
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default n
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help
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Binder is used in Android for both communication between processes,
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and remote method invocation.
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This means one Android process can call a method/routine in another
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Android process, using Binder to identify, invoke and pass arguments
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between said processes.
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config ANDROID_BINDERFS
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bool "Android Binderfs filesystem"
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depends on ANDROID_BINDER_IPC
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default n
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help
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Binderfs is a pseudo-filesystem for the Android Binder IPC driver
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which can be mounted per-ipc namespace allowing to run multiple
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instances of Android.
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Each binderfs mount initially only contains a binder-control device.
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It can be used to dynamically allocate new binder IPC devices via
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ioctls.
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config ANDROID_BINDER_DEVICES
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string "Android Binder devices"
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depends on ANDROID_BINDER_IPC
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default "binder,hwbinder,vndbinder"
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help
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Default value for the binder.devices parameter.
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The binder.devices parameter is a comma-separated list of strings
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that specifies the names of the binder device nodes that will be
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created. Each binder device has its own context manager, and is
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therefore logically separated from the other devices.
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config ANDROID_BINDER_IPC_SELFTEST
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bool "Android Binder IPC Driver Selftest"
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depends on ANDROID_BINDER_IPC
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help
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This feature allows binder selftest to run.
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Binder selftest checks the allocation and free of binder buffers
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exhaustively with combinations of various buffer sizes and
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alignments.
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config ANDROID_DEBUG_SYMBOLS
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bool "Android Debug Symbols"
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help
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Enables export of debug symbols that are useful for offline debugging
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of a kernel. These symbols would be used in vendor modules to find
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addresses of the core kernel symbols for vendor extensions.
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This driver is statically compiled into kernel and maintains all the
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required symbol addresses for vendor modules and provides necessary
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interface vendor modules.
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config ANDROID_VENDOR_HOOKS
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bool "Android Vendor Hooks"
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depends on TRACEPOINTS
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help
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Enable vendor hooks implemented as tracepoints
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Allow vendor modules to attach to tracepoint "hooks" defined via
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DECLARE_HOOK or DECLARE_RESTRICTED_HOOK.
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config ANDROID_KABI_RESERVE
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bool "Android KABI reserve padding"
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default y if !NO_GKI
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help
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This option enables the padding that the Android GKI kernel adds
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to many different kernel structures to support an in-kernel stable ABI
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over the lifespan of support for the kernel.
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Only disable this option if you have a system that needs the Android
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kernel drivers, but is NOT an Android GKI kernel image. If disabled
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it has the possibility to make the kernel static and runtime image
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slightly smaller but will NOT be supported by the Google Android
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kernel team.
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If even slightly unsure, say Y.
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config ANDROID_VENDOR_OEM_DATA
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bool "Android vendor and OEM data padding"
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default y if !NO_GKI
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help
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This option enables the padding that the Android GKI kernel adds
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to many different kernel structures to support an in-kernel stable ABI
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over the lifespan of support for the kernel as well as OEM additional
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fields that are needed by some of the Android kernel tracepoints. The
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macros enabled by this option are used to enable padding in vendor modules
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used for the above specified purposes.
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Only disable this option if you have a system that needs the Android
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kernel drivers, but is NOT an Android GKI kernel image and you do NOT
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use the Android kernel tracepoints. If disabled it has the possibility
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to make the kernel static and runtime image slightly smaller but will
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NOT be supported by the Google Android kernel team.
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If even slightly unsure, say Y.
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endif # if ANDROID
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endmenu
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