ExtremeKernel for Exynos 990 devices

Features

• Linux 4.19.87
• OneUI 6.x support
• Supports all Exynos 990 devices
• Compiled with Neutron Clang 18 + LLVM/LLVM_IAS and arhitecture optimization
• KernelSU v0.9.5 (version 11872) support
• Based on the latest Samsung source for Exynos 990
• Fixed all compilation warnings and some Samsung bugs
• Disabled Samsung's anti-rooting protection
• Partially disabled Samsung's excessive tracing
• Enabled all TCP Scheduling Algorithms, CPU Governors and I/O Schedulers available in the source
• SELinux Enforcing
• Boeffla Wakelock Blocker support with a decent default list
• Wireguard support
• Charging Bypass support
• LZ4 ZRAM compression by default
• Backported the Timer Events Oriented (TEO) CPUIdle Governor from 5.x kernel
• Backported VDSO(32) from upstream 4.19-stable kernel
• Backported latest LZ4 1.9.4 module with ARM64v8 optimizations
• Backported IncrementalFS (https://source.android.com/docs/core/architecture/kernel/incfs) from latest 4.19-stable (Requires ROM support)
• Backported FUSE Passthrough (Requires ROM support)
• Backported EroFS driver from 5.10 with some extra tweaks
• Various network optimizations and touch latency tweaks
• Various stability/optimization backports from newer Android kernel versions
• Various general architecture patches, CPU improvements, memory management improvements etc
• Various other backports from newer kernel versions
• Easy to modify and compile for developers
• Optimized for a balance between performance, battery life and low thermals
• Fully open source with a clean commit history

Supported devices:

G980F - S20 4G - x1slte

G981B - S20 5G - x1s

G985F - S20+ 4G - y2slte

G986B - S20+ 5G - y2s

G988B - S20 Ultra (5G) - z3s

N980F - Note 20 4G - c1slte

N981B - Note 20 5G - c1s

N985F - Note 20 Ultra 4G - c2slte

N986B - Note 20 Ultra 5G - c2s

G780F - S20 FE (4G) - r8s

Build instructions:

1. Set up build environment as per Google documentation

https://source.android.com/docs/setup/start/requirements

• The libarchive-tools package is also necessary to patch the toolchain.
• The ccache package is necessary if you wish to build with CCache (Quicker subsequest builds)

2. Properly clone repository with submodules (KernelSU and toolchains)

git clone --recurse-submodules https://github.com/ExtremeXT/android_kernel_samsung_exynos990.git

3. Build for your device without CCache and with KSU

./build.sh -m x1slte -k y -c n

4. Fetch the flashable zip of the kernel that was just compiled

build/out/[your_device]/ExtremeKernel...zip

5. Flash it using a supported recovery like TWRP or PBRP (AOSP recovery does not work)

6. Enjoy!