diff --git a/bootstrap.d/13-kernel.sh b/bootstrap.d/13-kernel.sh
index fd18094..e57b25e 100644
--- a/bootstrap.d/13-kernel.sh
+++ b/bootstrap.d/13-kernel.sh
@@ -82,6 +82,36 @@ if [ "$BUILD_KERNEL" = true ] ; then
       -e "s/\(^CONFIG_DRM.*\=\).*/\1n/"\
       "${KERNEL_DIR}/.config"
     fi
+	
+	# GPL v2.0
+	#https://github.com/sakaki-/bcmrpi3-kernel-bis/blob/master/conform_config.sh
+	if [ "$KERNEL_ZSWAP" = true ] && ( [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ) ; then
+      # enable ZSWAP support for better performance during large builds etc.
+      # requires activation via kernel parameter or sysfs
+      # see e.g. https://askubuntu.com/a/472227 for a summary of ZSWAP (vs ZRAM etc.)
+      # and e.g. https://wiki.archlinux.org/index.php/zswap for parameters etc.
+
+      set_kernel_config ZPOOL y "${KERNEL_DIR}/.config"
+      set_kernel_config ZSWAP y "${KERNEL_DIR}/.config"
+      set_kernel_config ZBUD y "${KERNEL_DIR}/.config"
+      set_kernel_config Z3FOLD y "${KERNEL_DIR}/.config"
+      set_kernel_config ZSMALLOC y "${KERNEL_DIR}/.config"
+      set_kernel_config PGTABLE_MAPPING y "${KERNEL_DIR}/.config"
+	fi
+	
+	if [ "$KERNEL_VIRT" = true ] && ( [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ) ; then
+      # Submit PRs with edits targeting the _bottom_ of this file
+      # Please set modules where possible, rather than building in, and
+      # provide a short rationale comment for the changes made
+
+      # enable basic KVM support; see e.g.
+      # https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=210546&start=25#p1300453
+
+      set_kernel_config VIRTUALIZATION y "${KERNEL_DIR}/.config"
+      set_kernel_config KVM y "${KERNEL_DIR}/.config"
+      set_kernel_config VHOST_NET m "${KERNEL_DIR}/.config"
+      set_kernel_config VHOST_CROSS_ENDIAN_LEGACY y "${KERNEL_DIR}/.config"
+	fi
 
     if [ "$KERNELSRC_CONFIG" = true ] ; then
       # Load default raspberry kernel configuration
@@ -242,17 +272,32 @@ if [ "$BUILD_KERNEL" = true ] ; then
   fi
 
 else # BUILD_KERNEL=false
-  echo " Install precompiled kernel..."
-  echo "error: not implemented"
+#  echo " Install precompiled kernel..."
+#  echo "error: not implemented"
+if [ "$KERNEL_ARCH" = arm64 ] && ( [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ) ; then
+    # Create temporary directory for dl
+    temp_dir=$(as_nobody mktemp -d)
+	
+	# Fetch kernel dl
+	as_nobody wget -c "$RPI3_64_KERNEL_URL" "${temp_dir}"/kernel.tar.xz
+	#extract download
+    tar -xJf kernel.tar.xz -C "${R}"
+
+    # Remove temporary directory for kernel sources
+    rm -fr "${temp_dir}"
+
+    # Set permissions of the kernel sources
+    chown -R root:root "${R}/boot"
+	chown -R root:root "${R}/lib"
+fi
+
   # Check if kernel installation was successful
-  VMLINUZ="$(ls -1 "${R}"/boot/vmlinuz-* | sort | tail -n 1)"
-  if [ -z "$VMLINUZ" ] ; then
-    echo "error: kernel installation failed! (/boot/vmlinuz-* not found)"
+  KERNEL="$(ls -1 "${R}"/boot/kernel* | sort | tail -n 1)"
+  if [ -z "$KERNEL" ] ; then
+    echo "error: kernel installation failed! (/boot/kernel* not found)"
     cleanup
     exit 1
   fi
-  # Copy vmlinuz kernel to the boot directory
-  install_readonly "${VMLINUZ}" "${BOOT_DIR}/${KERNEL_IMAGE}"
 
   if [ "$SET_ARCH" = 64 ] ; then
   echo "Using precompiled arm64 kernel"
diff --git a/functions.sh b/functions.sh
index 8c52abd..7f6f719 100644
--- a/functions.sh
+++ b/functions.sh
@@ -79,3 +79,26 @@ chroot_remove_cc() {
     COMPILER_PACKAGES=""
   fi
 }
+#GPL v2.0
+#https://github.com/sakaki-/bcmrpi3-kernel-bis/blob/master/conform_config.sh
+# edited with thir param
+#start
+set_kernel_config() {
+    # flag as $1, value to set as $2, config must exist at "./.config"
+    local TGT="CONFIG_${1}"
+    local REP="${2//\//\\/}"
+    if grep -q "^${TGT}[^_]" .config; then
+        sed -i "s/^\(${TGT}=.*\|# ${TGT} is not set\)/${TGT}=${REP}/" "${3}"
+    else
+        echo "${TGT}=${2}" >> "${3}"
+    fi
+}
+
+unset_kernel_config() {
+    # unsets flag with the value of $1, config must exist at "./.config"
+    local TGT="CONFIG_${1}"
+    sed -i "s/^${TGT}=.*/# ${TGT} is not set/" "${2}"
+}
+#
+#end
+#
diff --git a/rpi23-gen-image.sh b/rpi23-gen-image.sh
index 71b451d..db6ee6e 100755
--- a/rpi23-gen-image.sh
+++ b/rpi23-gen-image.sh
@@ -55,7 +55,12 @@ WLAN_FIRMWARE_URL=${WLAN_FIRMWARE_URL:=https://github.com/RPi-Distro/firmware-no
 COLLABORA_URL=${COLLABORA_URL:=https://repositories.collabora.co.uk/debian}
 FBTURBO_URL=${FBTURBO_URL:=https://github.com/ssvb/xf86-video-fbturbo.git}
 UBOOT_URL=${UBOOT_URL:=https://git.denx.de/u-boot.git}
-VIDEOCORE_URL=${VIDEOCORE_URL=https://github.com/raspberrypi/userland}
+VIDEOCORE_URL=${VIDEOCORE_URL:=https://github.com/raspberrypi/userland}
+#BIS= Kernel has KVM and zswap enabled
+RPI3_64_BIS_KERNEL_URL=${RPI3_64_BIS_KERNEL_URL:=https://github.com/sakaki-/bcmrpi3-kernel-bis/releases/download/4.14.80.20181113/bcmrpi3-kernel-bis-4.14.80.20181113.tar.xz}
+#default bcmrpi3_defconfig target kernel
+RPI3_64_DEF_KERNEL_URL=${RPI3_64_DEF_KERNEL_URL:=https://github.com/sakaki-/bcmrpi3-kernel/releases/download/4.14.80.20181113/bcmrpi3-kernel-4.14.80.20181113.tar.xz}
+RPI3_64_KERNEL_URL=${RPI3_64_KERNEL_URL:=$RPI3_64_BIS_KERNEL_URL}
 #https://aur.archlinux.org/packages/pi-bluetooth/
 BLUETOOTH_URL=${BLUETOOTH_URL:=https://aur.archlinux.org/pi-bluetooth.git}
 
@@ -166,6 +171,8 @@ KERNEL_MENUCONFIG=${KERNEL_MENUCONFIG:=false}
 KERNEL_REMOVESRC=${KERNEL_REMOVESRC:=true}
 KERNEL_OLDDEFCONFIG=${KERNEL_OLDDEFCONFIG:=false}
 KERNEL_CCACHE=${KERNEL_CCACHE:=false}
+KERNEL_ZSWAP=${KERNEL_ZSWAP:=true}
+KERNEL_VIRT=${KERNEL_VIRT:=true}
 
 # Kernel compilation from source directory settings
 KERNELSRC_DIR=${KERNELSRC_DIR:=""}