scripts/update-linux-headers.sh

   1 #!/bin/sh -e
   2 #
   3 # Update Linux kernel headers QEMU requires from a specified kernel tree.
   4 #
   5 # Copyright (C) 2011 Siemens AG
   6 #
   7 # Authors:
   8 #  Jan Kiszka        <jan.kiszka@siemens.com>
   9 #
  10 # This work is licensed under the terms of the GNU GPL version 2.
  11 # See the COPYING file in the top-level directory.
  12
  13 tmpdir=`mktemp -d`
  14 linux="$1"
  15 output="$2"
  16
  17 if [ -z "$linux" ] || ! [ -d "$linux" ]; then
  18     cat << EOF
  19 usage: update-kernel-headers.sh LINUX_PATH [OUTPUT_PATH]
  20
  21 LINUX_PATH      Linux kernel directory to obtain the headers from
  22 OUTPUT_PATH     output directory, usually the qemu source tree (default: $PWD)
  23 EOF
  24     exit 1
  25 fi
  26
  27 if [ -z "$output" ]; then
  28     output="$PWD"
  29 fi
  30
  31 # This will pick up non-directories too (eg "Kconfig") but we will
  32 # ignore them in the next loop.
  33 ARCHLIST=$(cd "$linux/arch" && echo *)
  34
  35 for arch in $ARCHLIST; do
  36     # Discard anything which isn't a KVM-supporting architecture
  37     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  38         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  39         continue
  40     fi
  41
  42     # Blacklist architectures which have KVM headers but are actually dead
  43     if [ "$arch" = "ia64" ]; then
  44         continue
  45     fi
  46
  47     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  48
  49     rm -rf "$output/linux-headers/asm-$arch"
  50     mkdir -p "$output/linux-headers/asm-$arch"
  51     for header in kvm.h kvm_para.h; do
  52         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  53     done
  54     if [ $arch = x86 ]; then
  55         cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
  56     fi
  57     if [ $arch = powerpc ]; then
  58         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  59     fi
  60 done
  61
  62 rm -rf "$output/linux-headers/linux"
  63 mkdir -p "$output/linux-headers/linux"
  64 for header in kvm.h kvm_para.h vfio.h vhost.h virtio_config.h virtio_ring.h \
  65               psci.h; do
  66     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
  67 done
  68 rm -rf "$output/linux-headers/asm-generic"
  69 mkdir -p "$output/linux-headers/asm-generic"
  70 for header in kvm_para.h; do
  71     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
  72 done
  73 if [ -L "$linux/source" ]; then
  74     cp "$linux/source/COPYING" "$output/linux-headers"
  75 else
  76     cp "$linux/COPYING" "$output/linux-headers"
  77 fi
  78
  79 rm -rf "$tmpdir"