[KERNEL] Jesse's Kernel for Galaxy S8 and S8+ (Exynos) - Samsung Galaxy S8 & S8+ Cross Device Development

Jesse's Kernel (I am not good at naming sth.)
for Galaxy S8 and S8+ (Exynos)
(G950F/FD/X/N) and (G955F/FD/X/N)
This kernel is designed to be SIMPLE and STABLE with improved performance and battery life.
Just flash and enjoy your phone. No additional setting required.
This kernel has 3 series,
Early-Testing: Contains latest changes, experimental features. This build will be released to testers only.
Stable: Changes, features in early-testing build will be picked into stable once they are confirmed to be stable.
Semi-Stock: For those who want maximum stability or ROM developers who want to integrate with their ROMs. This build is very similar to stock but it will have some useful changes like SELinux permissive, disabled security features, etc. This build will be released to public in low update frequency(usuallly based on stock kernel changes).
LICENSE:
Kernel sources:
GPL 2.0: https://www.gnu.org/licenses/gpl-2.0.html
Kernel binaries, patches to system, ramdisk modifications, etc.:
Code:
You can use, mirror, modify and/or integrate it/them with your own works, WITHOUT inform me, subject to the following conditions:
1. Credit MUST be given. (a possible form: thanks *** for ***)
2. Warranty is NOT provided. I am not responsible for any possible losses.
3. Authorization may be TERMINATED for selected person without prior notice under certain conditions (subject to my sole discretion).
4. Above conditions must be preserved. (You have the responsibilities to inform your users about these conditions. A possible way is to add "LICENSE: (link to this post)" to "thanks *** for ***")
Features:
STABLE: (Mainline)
Toolchain: Linaro GCC 7
Linux 4.4.79 (updated from 4.4.13)
Always SELinux Permissive (with fake SELinux Enforcing status.)
Kernel Security Features, Root Restrictions are DISABLED
Linux mainline random generator driver backported
Max frequency of big cores set to 2.5GHz
Other optimizations, backports for best performance and power efficiency
BFQ I/O scheduler
Versioning: VERSION x.x
Release Frequency: Regularly
SEMI-STOCK:
Toolchain: Linaro GCC 7
Linux 4.4.79 (updated from 4.4.13)
Always SELinux Permissive (with fake SELinux Enforcing status.)
Kernel Security Features, Root Restrictions are DISABLED
Versioning: RELEASE x
Release Frequency: Rare (only stock kernel updates and bug fixes)
NOTE: As of VERSION 0.3 and SEMI-STOCK RELEASE 6, AQG5 or newer bootloader is required.
Download:
STABLE:
VERSION 0.3: (Source Tag)
https://www.androidfilehost.com/?fid=673368273298975229
SEMI-STOCK:
RELEASE 6: (Source Tag)
https://www.androidfilehost.com/?fid=889764386195919462
NOTE:
1. Existing Bluetooth Pairs, Wi-Fi Passwords will be forgot when you flash this kernel for the first time.
2. You need to flash root package (Magisk or SuperSU) AFTER flash kernel if you want root access.
Show your appreciation:
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Get informed about news and updates:
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XDA:DevDB Information
Jesse's Kernel for Galaxy S8 and S8+, Kernel for the Samsung Galaxy S8+
Contributors
jesec
Source Code: https://github.com/jesec/android_kernel_samsung_universal8895
Kernel Special Features:
Version Information
Status: Stable
Created 2017-05-08
Last Updated 2017-07-30

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Changelog:
STABLE:
VERSION 0.3, July 29th:
Merge AQG5 kernel updates from Samsung
Merge Linux 4.4.79
Merge BFQ-v8r12
Backport latest F2FS
Switch to latest Linaro GCC 7 toolchain with processor specific tunes.
Use -Ofast optimization.
VERSION 0.2.2, June 26th:
Merge AQF7 kernel updates from Samsung
Merge Linux 4.4.74
VERSION 0.2.1, May 27th:
Merge AQE5 kernel updates from Samsung
Merge Linux 4.4.69
Update system patches
VERSION 0.2, May 19th:
Updated to Linux 4.4.68
Full F2FS file system support (with latest driver backported from Linux 4.12) is added.
Possible kernel panic (random reboots) addressed.
Possible battery life improvements for CPU frequency boosts.
BFQ is added and set as the default I/O scheduler.
VoLTE & VoWiFi problem fixed. (verified by testers)
NOTE: VoLTE logo may not be an accurate indicator of VoLTE support.
VERSION 0.1, May 11th:
Initial Release.
SEMI-STOCK:
RELEASE 6, July 29th:
Merge AQG5 kernel updates from Samsung
Merge Linux 4.4.79
Backport latest F2FS
Switch to latest Linaro GCC 7 toolchain with processor specific tunes.
Use -Ofast optimization.
RELEASE 5, June 26th:
Merge AQF7 kernel updates from Samsung
Merge Linux 4.4.74
RELEASE 4, May 27th:
Merge AQE5 kernel updates from Samsung
Merge Linux 4.4.69
Update system patches
RELEASE 3, May 19th:
Updated to Linux 4.4.68
Switched to GCC 8.X
Full F2FS file system support (with latest driver backported from Linux 4.12) is added.
Possible kernel panic (random reboots) addressed.
VoLTE & VoWiFi problem fixed. (verified by testers)
NOTE: VoLTE logo may not be an accurate indicator of VoLTE support.
RELEASE 2, May 11th:
Storage and CPU performance problems fixed.

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Guides:
HOW-TO FLASH THIS KERNEL:
1. Make sure TWRP is installed. (https://forum.xda-developers.com/showpost.php?p=72004368&postcount=3)
2. Download the flashable zip from download section in OP.
3. Transfer the zip to your phone.
4. Go to "Install" menu of TWRP and flash the zip.
(for devs) HOW-TO PROPERLY INTEGRATE THIS KERNEL TO YOUR ROM:
1. Download the flashable zip from download section in OP.
2. Rename the downloaded zip to "jesse-kernel.zip".
3. Delete original boot.img of your ROM.
4. Place the zip to kernel (create if not exists) folder of your ROM.
Example Structure:
->META-INF
->->com
->->...
->system
->->app
->->priv-app
->->...
->kernel
->->jesse-kernel.zip
->...
5. Delete original kernel flashing lines from installation script (META-INF/com/google/android/updater-script) of your ROM.
tip: usually start with package_extract_file("boot.img" after "ui_print("Extracting boot image...");".
6. Add these lines to the installation script of your ROM:
Code:
ui_print("Installing Jesse's Kernel...");
package_extract_dir("kernel", "/tmp/kernel");
run_program("/sbin/busybox", "unzip", "/tmp/kernel/jesse-kernel.zip", "META-INF/com/google/android/*", "-d", "/tmp/kernel");
set_perm(0, 1000, 0755, "/tmp/kernel/META-INF/com/google/android/update-binary");
run_program("/tmp/kernel/META-INF/com/google/android/update-binary", "3", "1", "/tmp/kernel/jesse-kernel.zip");
ui_print("Jesse's Kernel Installed");
(for devs) Tips about kernel compile: (Note: NO technical support for such things. Inquires will be ignored.)
1. There is a kernel build script in my kernel. (build_kernel.sh)
2. Two variables must be specified before you can run it.
export $KERNEL_TOOLCHAIN=/path/to/your-toolchain/bin/toolchain-prefix-
export $KERNEL_DTBTOOL=/path/to/dtbtool/dtbhtoolExynos
3. If you are building for Galaxy S8 (dreamlte), run it with "bash build_kernel.sh dreamlte".
If you are building for Galaxy S8+ (dream2lte), run it with "bash build_kernel.sh dream2lte".
4. Default output dir is "../kernel_out". "dt.img" and "Image" will be generated.

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That's what I'm talking about! Thank you!!

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Thanks @jesec for this and twrp. Without u development would be so far behind
sent from the R.I.C.E powered V8+

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Great work mate :fingers-crossed:

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State-wide provider blackout the very second i flashed. No worries!

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Thanks for your hard work. Great job as always.
Sent from my SM-G955F using Tapatalk

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what is the difference between stock and semi stock?

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GreyFox777 said:
what is the difference between stock and semi stock?
Click to expand...
Click to collapse
Got the same question.. I've installed it, but it doesn't seem to have any advanced governors, etc on board.
But still very nice to have the first kernel on!!!!!
Jesec, you're just great
Btw: does the name Jesse's kernel was chosen on purpose or just a mistake?

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GreyFox777 said:
what is the difference between stock and semi stock?
Click to expand...
Click to collapse
This kernel look like a basic kernel update from 4.4.13 to 4.4.66

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@jesec
Awesome, thanks a lot bro!

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Thank you for the first custom kernel
Can we expect a permissive kernel for this device soon?

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tiho5 said:
Thank you for the first custom kernel
Can we expect a permissive kernel for this device soon?
Click to expand...
Click to collapse
Per github commit, the big news here is that this kernel is permissive!
@jessec, you are totaly awesome:good:
Thank you for being here!
Update; appear kernel selinux is still enforcing

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It is SELinux permissive. That enforcing is fake actually. (just let userspace think status change is successful)
Changelog: (May. 9th)
I fixed a bug of script. Now new build (May. 9th) should work fine on non-plus variants.

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finally i can use ARISE completely. thx a lot

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Great one. Many thanks. I will try and report.
Sent from my SM-G955F using Tapatalk

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Feels good to see development here, used to love ur work on GS7.
One question, where can I get the Magisk Flashable? I got it when flashed the ROM but I cant flash the ROM over the kernel or I will lose the kernel

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jesec said:
It is SELinux permissive. That enforcing is fake actually. (just let userspace think status change is successful)
Changelog: (May. 9th)
I fixed a bug of script. Now new build (May. 9th) should work fine on non-plus variants.
Click to expand...
Click to collapse
Great.
Thanks. That's what I've been waiting for.

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metuskale said:
Feels good to see development here, used to love ur work on GS7.
One question, where can I get the Magisk Flashable? I got it when flashed the ROM but I cant flash the ROM over the kernel or I will lose the kernel
Click to expand...
Click to collapse
here it is: