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 "$from" -name '*virtio*h' -o -name "input.h")
  35     if [ "$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                                              -e 'sys/' \
  44                                              > /dev/null
  45             then
  46                 echo "Unexpected #include in input file $f".
  47                 exit 2
  48             fi
  49
  50             header=$(basename "$f");
  51             sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  52                 -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  53                 -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  54                 -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  55                 -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  56                 -e 's/__bitwise__//' \
  57                 -e 's/__attribute__((packed))/QEMU_PACKED/' \
  58                 -e 's/__inline__/inline/' \
  59                 "$f" > "$to/$header";
  60         done
  61     fi
  62 }
  63
  64 # This will pick up non-directories too (eg "Kconfig") but we will
  65 # ignore them in the next loop.
  66 ARCHLIST=$(cd "$linux/arch" && echo *)
  67
  68 for arch in $ARCHLIST; do
  69     # Discard anything which isn't a KVM-supporting architecture
  70     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  71         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  72         continue
  73     fi
  74
  75     # Blacklist architectures which have KVM headers but are actually dead
  76     if [ "$arch" = "ia64" ]; then
  77         continue
  78     fi
  79
  80     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  81
  82     rm -rf "$output/linux-headers/asm-$arch"
  83     mkdir -p "$output/linux-headers/asm-$arch"
  84     for header in kvm.h kvm_para.h; do
  85         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  86     done
  87     if [ $arch = x86 ]; then
  88         cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
  89     fi
  90     if [ $arch = powerpc ]; then
  91         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  92     fi
  93
  94     cp_virtio "$tmpdir/include/asm" "$output/include/standard-headers/asm-$arch"
  95 done
  96
  97 rm -rf "$output/linux-headers/linux"
  98 mkdir -p "$output/linux-headers/linux"
  99 for header in kvm.h kvm_para.h vfio.h vhost.h \
 100               psci.h; do
 101     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 102 done
 103 rm -rf "$output/linux-headers/asm-generic"
 104 mkdir -p "$output/linux-headers/asm-generic"
 105 for header in kvm_para.h; do
 106     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 107 done
 108 if [ -L "$linux/source" ]; then
 109     cp "$linux/source/COPYING" "$output/linux-headers"
 110 else
 111     cp "$linux/COPYING" "$output/linux-headers"
 112 fi
 113
 114 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 115 #include "standard-headers/linux/virtio_config.h"
 116 EOF
 117 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 118 #include "standard-headers/linux/virtio_ring.h"
 119 EOF
 120
 121 cp_virtio "$tmpdir/include/linux/" "$output/include/standard-headers/linux"
 122
 123 cat <<EOF >$output/include/standard-headers/linux/types.h
 124 #include <stdint.h>
 125 #include "qemu/compiler.h"
 126 EOF
 127 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 128 #define ETH_ALEN    6
 129 EOF
 130
 131 rm -rf "$tmpdir"