prepare_kernel.sh

gistfile1.txt

KERNEL=4.10.3

NPROC=$(nproc)
HERE=$(dirname $(readlink -f "$0"))

function log
{
  printf "[+] $1\n"
}

#log "Installing dependencies"
#yay -Syu bc qemu qemu-arch-extra

log "Fetching Linux ($KERNEL)"
kernel_name="linux-$KERNEL"
kernel_slug="v$(echo "$KERNEL" | cut -c1).x"
kernel_remote="https://mirrors.edge.kernel.org/pub/linux/kernel/$kernel_slug/$kernel_archive_name.tar.gz"
kernel_archive_path="$HERE/kernels/$kernel_name.tar.gz"
if [ ! -f "$kernel_archive_path" ]; then
  log "Downloading $kernel_remote to $kernel_archive_path"
  mkdir -p $(dirname "$kernel_archive_path")
  wget -q -c "$kernel_remote" -O "$kernel_archive_path"
fi

kernel_dirpath="$HERE/kernels/$kernel_name"
if [ ! -d "$kernel_dirpath" ]; then
  log "Extracting $kernel_archive_path to $HERE/kernels"
  mkdir -p $(dirname "$kernel_archive_path")
  tar xf "$kernel_archive_path" -C "$HERE/kernels"
fi

log "Building kernel"
if [ ! -f "$kernel_dirpath/arch/x86/boot/bzImage" ]; then
  make -C "$kernel_dirpath" -j "$NPROC" defconfig
  echo "CONFIG_NET_9P=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_NET_9P_DEBUG=n" >> "$kernel_dirpath/.config"
  echo "CONFIG_9P_FS=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_9P_FS_POSIX_ACL=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_9P_FS_SECURITY=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_NET_9P_VIRTIO=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_PCI=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_BLK=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_BLK_SCSI=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_NET=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_CONSOLE=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_HW_RANDOM_VIRTIO=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_DRM_VIRTIO_GPU=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_PCI_LEGACY=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_BALLOON=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_VIRTIO_INPUT=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_CRYPTO_DEV_VIRTIO=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_BALLOON_COMPACTION=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_PCI=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_PCI_HOST_GENERIC=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_GDB_SCRIPTS=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_INFO=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_INFO_REDUCED=n" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_INFO_SPLIT=n" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_FS=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_INFO_DWARF4=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_DEBUG_INFO_BTF=y" >> "$kernel_dirpath/.config"
  echo "CONFIG_FRAME_POINTER=y" >> "$kernel_dirpath/.config"
  make -C "$kernel_dirpath" -j "$NPROC" bzImage
fi