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        <[email protected]>
   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_portable() {
  32     f=$1
  33     to=$2
  34     if
  35         grep '#include' "$f" | grep -v -e 'linux/virtio' \
  36                                      -e 'linux/types' \
  37                                      -e 'stdint' \
  38                                      -e 'linux/if_ether' \
  39                                      -e 'sys/' \
  40                                      > /dev/null
  41     then
  42         echo "Unexpected #include in input file $f".
  43         exit 2
  44     fi
  45
  46     header=$(basename "$f");
  47     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  48         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  49         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  50         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  51         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  52         -e 's/__bitwise__//' \
  53         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  54         -e 's/__inline__/inline/' \
  55         -e '/sys\/ioctl.h/d' \
  56         -e 's/SW_MAX/SW_MAX_/' \
  57         "$f" > "$to/$header";
  58 }
  59
  60 # This will pick up non-directories too (eg "Kconfig") but we will
  61 # ignore them in the next loop.
  62 ARCHLIST=$(cd "$linux/arch" && echo *)
  63
  64 for arch in $ARCHLIST; do
  65     # Discard anything which isn't a KVM-supporting architecture
  66     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  67         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  68         continue
  69     fi
  70
  71     # Blacklist architectures which have KVM headers but are actually dead
  72     if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
  73         continue
  74     fi
  75
  76     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  77
  78     rm -rf "$output/linux-headers/asm-$arch"
  79     mkdir -p "$output/linux-headers/asm-$arch"
  80     for header in kvm.h kvm_para.h unistd.h; do
  81         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  82     done
  83     if [ $arch = powerpc ]; then
  84         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  85     fi
  86
  87     rm -rf "$output/include/standard-headers/asm-$arch"
  88     mkdir -p "$output/include/standard-headers/asm-$arch"
  89     if [ $arch = s390 ]; then
  90         cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
  91         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
  92     fi
  93     if [ $arch = x86 ]; then
  94         cp_portable "$tmpdir/include/asm/hyperv.h" "$output/include/standard-headers/asm-x86/"
  95         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
  96         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
  97         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
  98     fi
  99 done
 100
 101 rm -rf "$output/linux-headers/linux"
 102 mkdir -p "$output/linux-headers/linux"
 103 for header in kvm.h kvm_para.h vfio.h vhost.h \
 104               psci.h; do
 105     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 106 done
 107 rm -rf "$output/linux-headers/asm-generic"
 108 mkdir -p "$output/linux-headers/asm-generic"
 109 for header in kvm_para.h; do
 110     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 111 done
 112 if [ -L "$linux/source" ]; then
 113     cp "$linux/source/COPYING" "$output/linux-headers"
 114 else
 115     cp "$linux/COPYING" "$output/linux-headers"
 116 fi
 117
 118 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 119 #include "standard-headers/asm-x86/hyperv.h"
 120 EOF
 121 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 122 #include "standard-headers/linux/virtio_config.h"
 123 EOF
 124 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 125 #include "standard-headers/linux/virtio_ring.h"
 126 EOF
 127
 128 rm -rf "$output/include/standard-headers/linux"
 129 mkdir -p "$output/include/standard-headers/linux"
 130 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 131          "$tmpdir/include/linux/pci_regs.h"; do
 132     cp_portable "$i" "$output/include/standard-headers/linux"
 133 done
 134
 135 cat <<EOF >$output/include/standard-headers/linux/types.h
 136 #include <stdint.h>
 137 #include "qemu/compiler.h"
 138 EOF
 139 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 140 #define ETH_ALEN    6
 141 EOF
 142
 143 rm -rf "$tmpdir"