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# SPDX-License-Identifier: GPL-2.0
menu "Android"
config ANDROID
bool "Android Drivers"
---help---
Enable support for various drivers needed on the Android platform
if ANDROID
config ANDROID_BINDER_IPC
bool "Android Binder IPC Driver"
depends on MMU && !M68K
default n
---help---
Binder is used in Android for both communication between processes,
and remote method invocation.
This means one Android process can call a method/routine in another
Android process, using Binder to identify, invoke and pass arguments
between said processes.
config ANDROID_BINDER_DEVICES
string "Android Binder devices"
depends on ANDROID_BINDER_IPC
default "binder,hwbinder,vndbinder"
---help---
Default value for the binder.devices parameter.
The binder.devices parameter is a comma-separated list of strings
that specifies the names of the binder device nodes that will be
created. Each binder device has its own context manager, and is
therefore logically separated from the other devices.
config ANDROID_BINDER_IPC_SELFTEST
bool "Android Binder IPC Driver Selftest"
depends on ANDROID_BINDER_IPC
---help---
This feature allows binder selftest to run.
Binder selftest checks the allocation and free of binder buffers
exhaustively with combinations of various buffer sizes and
alignments.
config ANDROID_SIMPLE_LMK
bool "Simple Android Low Memory Killer"
depends on !ANDROID_LOW_MEMORY_KILLER && !MEMCG
---help---
This is a complete low memory killer solution for Android that is
small and simple. Processes are killed according to the priorities
that Android gives them, so that the least important processes are
always killed first. Processes are killed until memory deficits are
satisfied, as observed from kswapd struggling to free up pages. Simple
LMK stops killing processes when kswapd finally goes back to sleep.
if ANDROID_SIMPLE_LMK
config ANDROID_SIMPLE_LMK_MINFREE
int "Minimum MiB of memory to free per reclaim"
range 8 512
default 100
help
Simple LMK will try to free at least this much memory per reclaim.
config ANDROID_SIMPLE_LMK_TIMEOUT_MSEC
int "Reclaim timeout in milliseconds"
range 50 1000
default 200
help
Simple LMK tries to wait until all of the victims it kills have their
memory freed; however, sometimes victims can take a while to die,
which can block Simple LMK from killing more processes in time when
needed. After the specified timeout elapses, Simple LMK will stop
waiting and make itself available to kill more processes.
endif
endif # if ANDROID
endmenu
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