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About the Member Linaro Confectionary Release for Juno (Multi-arch 64-bit)
This Member Linaro Confectionary Release is based on the Nougat
android-7.1.1_r13 branch. This build is a userdebug variant
build, which contains multi-arch support allowing full use of the
64-bit ARMv8-A architecture, supports both 64-bit and 32-bit
applications and has selinux enabled by default.
This build uses the Linaro ARM Landing team kernel which is
based on the Android flavour of Linaro Stable Kernel version 4.4.32,
and includes the ARM Mali drivers for 3D graphics acceleration,
UEFI support, and Energy Aware Scheduling(EAS) support.
The sources are built with AOSP LLVM 3.8 clang-2690385 (based on LLVM 3.8.256229),
and gcc 4.9 for both 64bit and 32bit.
To switch to permissive mode, pass “androidboot.selinux=permissive” as
the boot parameter in the UEFI bootargs configuration, or run
“setenforce 0” from command line as root user after booted.
The Android AOSP software provided in this release is functionally
tested with CTS version 7.1 R1 and the CTS results are shared with
members. We also added some benchmark test to observe the
performance trend in various fields. OP-TEE feature is tested with
xtest and various TAs provided from project optee_test
Sources are also made available so you can build your own images
(see the Building from Source tab).
What is new
- Android source updated to base on android-7.1.1_r13 version
- CTS package update to use 7.1 R1 version
- Firmware version updated
- More boottime optimizatons added for this release
- Updated sqlite to verions 3.16.2
ChangeLog
Please check the changelog.txt for details to see what Linaro has done on top of AOSP android-7.1.1_r13.
About the Android flavour of Linaro Stable Kernel (LSK)
The kernel used by Linaro Confectionary Release is based on the Android
flavour of Linaro Stable Kernel (LSK), which is produced, validated and
released by Linaro and is based on the Linux stable kernel tree.
The LSK focuses on quality and stability and is therefore a great
foundation for product development. It also includes backports of
commonly desired features, provided they meet the quality requirements,
and also any bug fixes.
Sources are also made available so you can build your own images (see
‘Building from Source’).
Support
Subscribe to the important Linaro mailing lists and join our IRC
channels to stay on top of Linaro development.
- Linaro Android Development ‘Mailing list’
- Linaro Android IRC channel on irc.freenode.net at #linaro-android
- Linaro Android ART IRC channel on irc.freenode.net at #linaro-art
- Bug reports should be filed in ‘Bugzilla’ under “Linaro Android” product and “Member Linaro Confectionery Release (M-LCR)” component.
- You will need to login to your Linaro account. If you do not have an account or are having problems, email its@linaro.org for help.
- More general bug reports should be filed in Bugzilla against the individual packages that are affected.
- Questions? ‘ask linaro’
- Interested in commercial support? inquire at ‘Linaro Support’
OP-TEE Enablement
OP-TEE enablement on kernel side:
The OP-TEE v12 patches for LSK4.4 have been applied for Juno kernel.
Please use the kernel from here or new versions.
Or you can cherry pick the OP-TEE patches from here manually.
OP-TEE usespace projects
| Project | URL | Version |
| optee_client | https://github.com/OP-TEE/optee_client | 2.2.0 |
| optee_test | https://github.com/OP-TEE/optee_test | 2.2.0 |
| optee_os | https://github.com/OP-TEE/optee_os | 2.2.0 |
Firmware
Please use the firmware files from here, or extract the board_recovery_image.tar.bz2 file from the boot.tar.bz2 file listed above.
And then extract board_recovery_image.tar.bz2 and copy the contents to the board.
Android Patch Summary
There are patches developed by ARM and Linaro engineering teams were applied
to get Android booting to UI on the ARMv8-A Juno development platform.
These patches can be found on Linaro’s Android Git repositories via files:
- NOUGAT-MLCR-PATCHSET
- NOUGAT-BOOTTIME-OPTIMIZATIONS-JUNO
- juno-n-workarounds
Some of these patches have been submitted to AOSP and are being tracked for acceptance.
Any patches can be contributed through the instructions described Here
Non-ART Optimizations
| Gerrit ID/Commit ID | Project | Description |
| 17143 | bionic | Don’t warn about DT_FLAGS_1 containing DF_1_PIE |
| 17469 | bionic | Don’t reexport symbols removed from libgcc , for enabling gcc6.3 |
| 17480 | frameworks/base | -fno-strict-aliasing — gcc 6.3 finds more potential aliasing errors than 4.x |
| 17168 | frameworks/native | Fix build in 32-bit ARMv8 mode for vulkan |
| 297758 | frameworks/av | amrwb: disable sanitizer for fxp_mac_16by16 |
| 297759 | frameworks/av | avc enc: disable sanitizer for some functions |
| 17146 | build/soong | Allow the compiler to generate FPU instructions |
| 17154 | bionic | Set ARM_ARCH correctly for ARMv8 32bit builds |
| 17015 | build | Add switch to control optimizing for size vs. speed setting |
| 16260 | bionic | Cortex-A57 support for Bionic |
| 17148 | art | Whitelist some more supported CPU types |
| 15494 | bionic | Add optimized strcpy from cortex-strings |
| 16286 | external/android-clat | Build android-clat with -fno-strict-aliasing |
| 16311 | hardware/qcom/media | Work around aliasing rule violations |
| 17016 | system/core | Disable ALOGD and ALOGI messages in OPTIMIZE_FOR_SIZE NDEBUG builds |
| 765 | external/zlib | arm, arm64: ZLIB optimization using neon optimized copy |
| 17165 | external/libunwind_llvm | Force -mcpu=cortex-a15 while building 32-bit libunwind on aarch64 |
| 16756 | external/mksh | hack workaourd to run builds on lava |
| 17283 | external/libjpeg-turbo | patch to integrate tjbench |
Boot Time Optimizations
| Gerrit ID/Commit ID | Project | Description |
| 17321 | frameworks/base | Delay starting of some Java based services. |
| 17338 | frameworks/base | Move preloading classes to SystemServer.java and start it in background. |
| 17461 | frameworks/base | Stop bootanim earlier |
| 17404 | system/netd | move netd to class core |
| 17406 | system/core | start zygote in post-fs-data |
| 17409 | device/linaro/juno | init.juno.rc: set cpuset settings after boot completed |
| 17479 | system/core | set to use all cpus for all cpusets |
| 17443 | device/linaro/juno | juno: set cpu governor polciy after boot complete |
| 16554 | kernel/linaro/armlt | linaro/configs/EAS.conf: hack, use performance as default governor policy |
New Version External Projects
| Project | Version | Git | Branch |
| external/sqlite | 3.16.2 | https://android-git.linaro.org/gitweb/platform/external/sqlite.git | linaro-upstream-3.16.2 |
| external/giflib | 5.1.4 | https://android-git.linaro.org/gitweb/platform/external/giflib.git | linaro-upstream-5.1.4 |
| external/libpng | 1.6.20 | https://android-git.linaro.org/gitweb/platform/external/libpng.git | c7ef7361311966304711b45ce62363991b068682 |
| external/harfbuzz_ng | 0.9.41 | https://android-git.linaro.org/gitweb/platform/external/harfbuzz_ng.git | linaro-upstream-0.9.41 |
| external/fio | 2.8 | https://android-git.linaro.org/gitweb/platform/external/fio.git | linaro-upstream-2.8 |
Known Issues and Limitations
Known limitations
- Lack of audio support may cause apps using audio to hang
- HDLCD is not well supported yet
- OpenCL support is not present at this time and will be enabled in a future release
- Gearses2eclair shows up poor graphics performance sometimes
Known issues
The following known issues are present in this release. Please contact support@linaro.org if you wish to know more information about these issues or have access problems when attempting to view them.
| Bug ID | Bug title | Bug summary |
| Bug 2627 | Juno: home screen: display corruption on Android. | |
| Bug 2448 | Juno: linpack score is low from cutoff score on LCR-Reference | |
| Bug 2447 | Juno geekbench3 score is low from cutoff score on LCR-Reference | |
| Bug 2251 | LCR-R: Juno: benchmark: AndebenchPro-2015 failed to complete graphics test run | |
| Bug 2206 | varying-struct-arrays.shader_test fails on juno |