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 cp_virtio() {
  32     from=$1
  33     to=$2
  34     virtio=$(find "$from" -name '*virtio*h')
  35     if [ "$virtio" ]; then
  36         rm -rf "$to"
  37         mkdir -p "$to"
  38         for f in $virtio; do
  39             if
  40                 grep '#include' "$f" | grep -v -e 'linux/virtio' \
  41                                              -e 'linux/types' \
  42                                              -e 'linux/if_ether' \
  43                                              > /dev/null
  44             then
  45                 echo "Unexpected #include in input file $f".
  46                 exit 2
  47             fi
  48
  49             header=$(basename "$f");
  50             sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  51                 -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  52                 -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  53                 -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  54                 -e 's/__bitwise__//' \
  55                 -e 's/__attribute__((packed))/QEMU_PACKED/' \
  56                 "$f" > "$to/$header";
  57         done
  58     fi
  59 }
  60
  61 # This will pick up non-directories too (eg "Kconfig") but we will
  62 # ignore them in the next loop.
  63 ARCHLIST=$(cd "$linux/arch" && echo *)
  64
  65 for arch in $ARCHLIST; do
  66     # Discard anything which isn't a KVM-supporting architecture
  67     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  68         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  69         continue
  70     fi
  71
  72     # Blacklist architectures which have KVM headers but are actually dead
  73     if [ "$arch" = "ia64" ]; then
  74         continue
  75     fi
  76
  77     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  78
  79     rm -rf "$output/linux-headers/asm-$arch"
  80     mkdir -p "$output/linux-headers/asm-$arch"
  81     for header in kvm.h kvm_para.h; do
  82         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  83     done
  84     if [ $arch = x86 ]; then
  85         cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
  86     fi
  87     if [ $arch = powerpc ]; then
  88         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  89     fi
  90
  91     cp_virtio "$tmpdir/include/asm" "$output/include/standard-headers/asm-$arch"
  92 done
  93
  94 rm -rf "$output/linux-headers/linux"
  95 mkdir -p "$output/linux-headers/linux"
  96 for header in kvm.h kvm_para.h vfio.h vhost.h \
  97               psci.h; do
  98     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
  99 done
 100 rm -rf "$output/linux-headers/asm-generic"
 101 mkdir -p "$output/linux-headers/asm-generic"
 102 for header in kvm_para.h; do
 103     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 104 done
 105 if [ -L "$linux/source" ]; then
 106     cp "$linux/source/COPYING" "$output/linux-headers"
 107 else
 108     cp "$linux/COPYING" "$output/linux-headers"
 109 fi
 110
 111 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 112 #include "standard-headers/linux/virtio_config.h"
 113 EOF
 114 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 115 #include "standard-headers/linux/virtio_ring.h"
 116 EOF
 117
 118 cp_virtio "$tmpdir/include/linux/" "$output/include/standard-headers/linux"
 119
 120 cat <<EOF >$output/include/standard-headers/linux/types.h
 121 #include <stdint.h>
 122 #include "qemu/compiler.h"
 123 EOF
 124 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 125 #define ETH_ALEN    6
 126 EOF
 127
 128 rm -rf "$tmpdir"