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| author |   Arve Hjønnevåg <arve@android.com> | 2014-02-21 14:40:26 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-24 16:29:40 -0800 |
| commit | da49889deb34d351cdd113f9d1607dbb830cb5bb (patch) | |
| tree | edef3407acd5b33dd3c0786d973ee68a0c6aa60c /drivers/staging/android/Kconfig | |
| parent | staging: binder: Fix ABI for 64bit Android (diff) | |
| download | linux-dev-da49889deb34d351cdd113f9d1607dbb830cb5bb.tar.xz linux-dev-da49889deb34d351cdd113f9d1607dbb830cb5bb.zip | |
staging: binder: Support concurrent 32 bit and 64 bit processes.
For 64bit systems we want to use the same binder interface for 32bit and
64bit processes. Thus the size and the layout of the structures passed
between the kernel and the userspace has to be the same for both 32 and
64bit processes.
This change replaces all the uses of void* and size_t with
binder_uintptr_t and binder_size_t. These are then typedefed to specific
sizes depending on the use of the interface, as follows:
* __u32 - on legacy 32bit only userspace
* __u64 - on mixed 32/64bit userspace where all processes use the same
interface.
This change also increments the BINDER_CURRENT_PROTOCOL_VERSION to 8 and
hooks the compat_ioctl entry for the mixed 32/64bit Android userspace.
This patch also provides a CONFIG_ANDROID_BINDER_IPC_32BIT option for
compatability, which if set which enables the old protocol, setting
BINDER_CURRENT_PROTOCOL_VERSION to 7, on 32 bit systems.
Please note that all 64bit kernels will use the 64bit Binder ABI.
Cc: Colin Cross <ccross@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Serban Constantinescu <serban.constantinescu@arm.com>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
[jstultz: Merged with upstream type changes. Various whitespace fixes
and longer Kconfig description for checkpatch. Included improved commit
message from Serban (with a few tweaks).]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/android/Kconfig')
| -rw-r--r-- | drivers/staging/android/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig index b91c758883bf..3559690273aa 100644 --- a/drivers/staging/android/Kconfig +++ b/drivers/staging/android/Kconfig @@ -20,6 +20,18 @@ config ANDROID_BINDER_IPC Android process, using Binder to identify, invoke and pass arguments between said processes. +config ANDROID_BINDER_IPC_32BIT + bool "Use old 32-bit binder api" + depends on !64BIT + ---help--- + The Binder API has been changed to support both 32 and 64bit + applications in a mixed environment. + + Enable this to support an old 32-bit Android user-space (v4.4 and + earlier). + + Note that enabling this will break newer Android user-space. + config ASHMEM bool "Enable the Anonymous Shared Memory Subsystem" default n |