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                 -e 's/__inline__/inline/' \
  57                 "$f" > "$to/$header";
  58         done
  59     fi
  60 }
  61
  62 # This will pick up non-directories too (eg "Kconfig") but we will
  63 # ignore them in the next loop.
  64 ARCHLIST=$(cd "$linux/arch" && echo *)
  65
  66 for arch in $ARCHLIST; do
  67     # Discard anything which isn't a KVM-supporting architecture
  68     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  69         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  70         continue
  71     fi
  72
  73     # Blacklist architectures which have KVM headers but are actually dead
  74     if [ "$arch" = "ia64" ]; then
  75         continue
  76     fi
  77
  78     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  79
  80     rm -rf "$output/linux-headers/asm-$arch"
  81     mkdir -p "$output/linux-headers/asm-$arch"
  82     for header in kvm.h kvm_para.h; do
  83         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  84     done
  85     if [ $arch = x86 ]; then
  86         cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
  87     fi
  88     if [ $arch = powerpc ]; then
  89         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  90     fi
  91
  92     cp_virtio "$tmpdir/include/asm" "$output/include/standard-headers/asm-$arch"
  93 done
  94
  95 rm -rf "$output/linux-headers/linux"
  96 mkdir -p "$output/linux-headers/linux"
  97 for header in kvm.h kvm_para.h vfio.h vhost.h \
  98               psci.h; do
  99     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 100 done
 101 rm -rf "$output/linux-headers/asm-generic"
 102 mkdir -p "$output/linux-headers/asm-generic"
 103 for header in kvm_para.h; do
 104     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 105 done
 106 if [ -L "$linux/source" ]; then
 107     cp "$linux/source/COPYING" "$output/linux-headers"
 108 else
 109     cp "$linux/COPYING" "$output/linux-headers"
 110 fi
 111
 112 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 113 #include "standard-headers/linux/virtio_config.h"
 114 EOF
 115 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 116 #include "standard-headers/linux/virtio_ring.h"
 117 EOF
 118
 119 cp_virtio "$tmpdir/include/linux/" "$output/include/standard-headers/linux"
 120
 121 cat <<EOF >$output/include/standard-headers/linux/types.h
 122 #include <stdint.h>
 123 #include "qemu/compiler.h"
 124 EOF
 125 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 126 #define ETH_ALEN    6
 127 EOF
 128
 129 rm -rf "$tmpdir"