RPi kernels with virtio

home/lucifer/RPi/make-virtio-kernel

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+#!/usr/bin/env bash
+
+# Usage:       ./make-virtio-kernel
+#                or
+#              bash make-virtio-kernel
+# Description: Crossbuild four (4) RPi-kernels from given releases
+#                of the raspberrypi kernel (github).
+# Author:      Patrick Neumann (patrick@neumannsland.de)
+# Platform:    Debian GNU/Linux (tested: 10.x)
+# Version:     1.00
+# Date:        23.09.2020
+# Link:        ...
+# License:     GPL3
+# Warranty:    This program is distributed WITHOUT ANY WARRANTY
+
+# mapping archive to linux kernel version:
+# - 1.20200902-1 = 5.4.51
+# - 1.20200601+amd64-1 = 5.4.42
+# - 1.20200212-1 = 4.19.97
+# - 1.20200114-1 = 4.19.93
+# - 1.20190925-1 = 4.19.75
+# - 1.20190819-1 = 4.19.66
+# - 1.20190718-1 = 4.19.58
+# - 1.20190709-1 = 4.19.57
+# - 1.20190620-1 = 4.19.50 (32-Bit only!?)
+# - 1.20190517-1 = 4.19.42 (32-Bit only!?)
+# - 1.20190401-1 = 4.14.98 (32-Bit only!?)
+
+# check os:
+readonly OS="Debian GNU/Linux 10"
+if ! grep --fixed-strings "${OS}" /usr/lib/os-release > /dev/null 2>&1 ; then
+  echo "Only ${OS} is supported!"
+  exit 1
+fi
+
+# check and install deps if necessary:
+readonly PACKAGES="git
+bc
+bison
+flex
+libssl-dev
+make
+libc6dev
+libncurses5-dev
+crossbuild-essential-armhf
+crossbuild-essential-arm64"
+
+for package in ${PACKAGES} ; do
+  if ! dpkg -s "${package}" > /dev/null 2>&1 ; then
+    sudo apt install "${package}" --assume-yes
+  fi     
+done
+
+# check and generate config fragment file if necessary:
+if ! [ -r ./.config-virtio ] ; then
+  cat <<EOF > ./.config-virtio 
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_VIRTIO_BLK_SCSI=y
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_MENU=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_PCI_LEGACY=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_VIRTIO_INPUT=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+EOF
+fi
+
+# adjust number of jobs to cores (+ hypter threading):
+readonly CPUS="$( lscpu | awk '/^CPU\(s\):/ { print $NF; }' )"
+readonly JOBS="$( echo "12 * 1.5 / 1" | bc )"
+
+readonly RELEASES="1.20200114-1
+1.20200212-1
+1.20200601+amd64-1
+1.20200902-1
+1.20190925-1
+1.20190819-1
+1.20190718-1
+1.20190709-1
+1.20190620-1
+1.20190517-1
+1.20190401-1
+1.20190709-1
+1.20190620-1
+1.20190517-1
+1.20190401-1"
+
+for release in ${RELEASES} ; do
+  # download, extract, version,...
+  archive="raspberrypi-kernel_${release}.tar.gz"
+  wget --timestamping "https://github.com/raspberrypi/linux/archive/${archive}"
+  [ -r "${archive}" ] || continue
+  tar xzf "${archive}"
+  rm "${archive}"
+  mv "./linux-${archive%.tar.gz}" ./linux
+
+  cd ./linux
+
+  version="$( awk '/^VERSION =/ { print $NF; }' ./Makefile )"
+  patchlevel="$( awk '/^PATCHLEVEL =/ { print $NF; }' ./Makefile )"
+  sublevel="$( awk '/^SUBLEVEL =/ { print $NF; }' Makefile )"
+
+  target="${HOME}/RPi/Kernels/${version}.${patchlevel}.${sublevel}"
+  [ -d "${target}" ] || mkdir -p "${target}"
+  
+  # RPi1...
+  export KERNEL="kernel"
+  export ARCH="arm"
+  export CROSS_COMPILE="arm-linux-gnueabihf-"
+  make bcmrpi_defconfig
+  ./scripts/kconfig/merge_config.sh .config ../.config-virtio
+  make --jobs="${JOBS}" zImage
+  cp ./arch/arm/boot/zImage "${target}/RPi1-${KERNEL}-virtio"
+  make clean
+
+  # RPi2-3...
+  export KERNEL="kernel7"
+  make bcm2709_defconfig
+  ./scripts/kconfig/merge_config.sh .config ../.config-virtio
+  make --jobs="${JOBS}" zImage
+  cp ./arch/arm/boot/zImage "${target}/RPi2-${KERNEL}-virtio"
+  make clean
+
+  # RPi4 (32 Bit)...
+  export KERNEL="kernel7l"
+  make bcm2711_defconfig
+  ./scripts/kconfig/merge_config.sh .config ../.config-virtio
+  make --jobs="${JOBS}" zImage
+  cp ./arch/arm/boot/zImage "${target}/RPi4-${KERNEL}-virtio"
+  make clean
+
+  # RPi4 (64 Bit)...
+  export KERNEL="kernel8"
+  export ARCH="arm64"
+  export CROSS_COMPILE="aarch64-linux-gnu-"
+  make bcm2711_defconfig
+  ./scripts/kconfig/merge_config.sh .config ../.config-virtio
+  make --jobs="${JOBS}" Image
+  cp ./arch/arm64/boot/Image "${target}/RPi4-${KERNEL}-virtio"
+
+  # cleanup:
+  cd ..
+  rm -rf ./linux
+done
+
+exit 0