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 'input-event-codes' \
  40                                      -e 'sys/' \
  41                                      > /dev/null
  42     then
  43         echo "Unexpected #include in input file $f".
  44         exit 2
  45     fi
  46
  47     header=$(basename "$f");
  48     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  49         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  50         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  51         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  52         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  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         -e '/sys\/ioctl.h/d' \
  58         -e 's/SW_MAX/SW_MAX_/' \
  59         "$f" > "$to/$header";
  60 }
  61
  62 # This will pick up non-directories too (eg "Kconfig") but we will
  63 # ignore them in the next loop.
  64 ARCHLIST=$(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" -o "$arch" = "mips" ]; then
  75         continue
  76     fi
  77
  78     if [ "$arch" = x86 ]; then
  79         arch_var=SRCARCH
  80     else
  81         arch_var=ARCH
  82     fi
  83
  84     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
  85
  86     rm -rf "$output/linux-headers/asm-$arch"
  87     mkdir -p "$output/linux-headers/asm-$arch"
  88     for header in kvm.h kvm_para.h unistd.h; do
  89         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  90     done
  91     if [ $arch = powerpc ]; then
  92         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  93     fi
  94
  95     rm -rf "$output/include/standard-headers/asm-$arch"
  96     mkdir -p "$output/include/standard-headers/asm-$arch"
  97     if [ $arch = s390 ]; then
  98         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
  99     fi
 100     if [ $arch = arm ]; then
 101         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 102         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 103         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 104     fi
 105     if [ $arch = x86 ]; then
 106         cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
 107         /* this is a temporary placeholder until kvm_para.h stops including it */
 108 EOF
 109         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 110         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 111         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 112     fi
 113 done
 114
 115 rm -rf "$output/linux-headers/linux"
 116 mkdir -p "$output/linux-headers/linux"
 117 for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
 118               psci.h userfaultfd.h; do
 119     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 120 done
 121 rm -rf "$output/linux-headers/asm-generic"
 122 mkdir -p "$output/linux-headers/asm-generic"
 123 for header in kvm_para.h; do
 124     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 125 done
 126 if [ -L "$linux/source" ]; then
 127     cp "$linux/source/COPYING" "$output/linux-headers"
 128 else
 129     cp "$linux/COPYING" "$output/linux-headers"
 130 fi
 131
 132 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 133 #include "standard-headers/asm-x86/hyperv.h"
 134 EOF
 135 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 136 #include "standard-headers/linux/virtio_config.h"
 137 EOF
 138 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 139 #include "standard-headers/linux/virtio_ring.h"
 140 EOF
 141
 142 rm -rf "$output/include/standard-headers/linux"
 143 mkdir -p "$output/include/standard-headers/linux"
 144 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 145          "$tmpdir/include/linux/input-event-codes.h" \
 146          "$tmpdir/include/linux/pci_regs.h"; do
 147     cp_portable "$i" "$output/include/standard-headers/linux"
 148 done
 149
 150 cat <<EOF >$output/include/standard-headers/linux/types.h
 151 /* For QEMU all types are already defined via osdep.h, so this
 152  * header does not need to do anything.
 153  */
 154 EOF
 155 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 156 #define ETH_ALEN    6
 157 EOF
 158
 159 rm -rf "$tmpdir"