8ced0c6231
Avoid vm_area when copying to or from binder buffers. Instead, new copy functions are added that copy from kernel space to binder buffer space. These use kmap_atomic() and kunmap_atomic() to create temporary mappings and then memcpy() is used to copy within that page. Also, kmap_atomic() / kunmap_atomic() use the appropriate cache flushing to support VIVT cache architectures. Allow binder to build if CPU_CACHE_VIVT is defined. Several uses of the new functions are added here. More to follow in subsequent patches. Signed-off-by: Todd Kjos <tkjos@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1.7 KiB
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 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_BINDERFS bool "Android Binderfs filesystem" depends on ANDROID_BINDER_IPC default n ---help--- Binderfs is a pseudo-filesystem for the Android Binder IPC driver which can be mounted per-ipc namespace allowing to run multiple instances of Android. Each binderfs mount initially only contains a binder-control device. It can be used to dynamically allocate new binder IPC devices via ioctls.
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.
endif # if ANDROID
endmenu