e12dcc29cc
Add configs to control removing the macros or not. On some platform,
configureing out the macros removes the associated members from the
structs, this reduces the object size of the slabs related with the
structs, therefore reduces the total slab memory consumption of system.
Besides, this also reduces vmlinux size a bit, therefore the total
kernel memory size increses a bit.
The macros are ANDROID_KABI_RESERVE, ANDROID_VENDOR_DATA,
ANDROID_VENDOR_DATA_ARRAY, ANDROID_OEM_DATA, ANDROID_OEM_DATA_ARRAY.
Bug: 206561931
(cherry picked from commit b7a6c15a6f)
Signed-off-by: Qingqing Zhou <quic_qqzhou@quicinc.com>
(cherry picked from commit 3c06a5ce5e5857a1dff88a784e58e32bbddaf759)
Signed-off-by: Jaskaran Singh <quic_jasksing@quicinc.com>
Change-Id: Iea4b962dff386a17c9bef20ae048be4e17bf43ab
115 lines
3.9 KiB
Plaintext
115 lines
3.9 KiB
Plaintext
# 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
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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
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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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