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_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                                      -e 'pvrdma_verbs' \
  42                                      -e 'drm.h' \
  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/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/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  56         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  57         -e 's/__bitwise//' \
  58         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  59         -e 's/__inline__/inline/' \
  60         -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
  61         -e '/\"drm.h\"/d' \
  62         -e '/sys\/ioctl.h/d' \
  63         -e 's/SW_MAX/SW_MAX_/' \
  64         -e 's/atomic_t/int/' \
  65         "$f" > "$to/$header";
  66 }
  67
  68 # This will pick up non-directories too (eg "Kconfig") but we will
  69 # ignore them in the next loop.
  70 ARCHLIST=$(cd "$linux/arch" && echo *)
  71
  72 for arch in $ARCHLIST; do
  73     # Discard anything which isn't a KVM-supporting architecture
  74     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  75         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  76         continue
  77     fi
  78
  79     # Blacklist architectures which have KVM headers but are actually dead
  80     if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
  81         continue
  82     fi
  83
  84     if [ "$arch" = x86 ]; then
  85         arch_var=SRCARCH
  86     else
  87         arch_var=ARCH
  88     fi
  89
  90     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
  91
  92     rm -rf "$output/linux-headers/asm-$arch"
  93     mkdir -p "$output/linux-headers/asm-$arch"
  94     for header in kvm.h kvm_para.h unistd.h; do
  95         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  96     done
  97     if [ $arch = powerpc ]; then
  98         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  99     fi
 100
 101     rm -rf "$output/include/standard-headers/asm-$arch"
 102     mkdir -p "$output/include/standard-headers/asm-$arch"
 103     if [ $arch = s390 ]; then
 104         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 105         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
 106         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
 107     fi
 108     if [ $arch = arm ]; then
 109         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 110         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 111         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 112     fi
 113     if [ $arch = x86 ]; then
 114         cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
 115         /* this is a temporary placeholder until kvm_para.h stops including it */
 116 EOF
 117         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 118         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 119         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 120     fi
 121 done
 122
 123 rm -rf "$output/linux-headers/linux"
 124 mkdir -p "$output/linux-headers/linux"
 125 for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
 126               psci.h psp-sev.h userfaultfd.h; do
 127     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 128 done
 129 rm -rf "$output/linux-headers/asm-generic"
 130 mkdir -p "$output/linux-headers/asm-generic"
 131 for header in kvm_para.h; do
 132     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 133 done
 134 if [ -L "$linux/source" ]; then
 135     cp "$linux/source/COPYING" "$output/linux-headers"
 136 else
 137     cp "$linux/COPYING" "$output/linux-headers"
 138 fi
 139
 140 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 141 #include "standard-headers/asm-x86/hyperv.h"
 142 EOF
 143 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 144 #include "standard-headers/linux/virtio_config.h"
 145 EOF
 146 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 147 #include "standard-headers/linux/virtio_ring.h"
 148 EOF
 149
 150 rm -rf "$output/include/standard-headers/linux"
 151 mkdir -p "$output/include/standard-headers/linux"
 152 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 153          "$tmpdir/include/linux/input-event-codes.h" \
 154          "$tmpdir/include/linux/pci_regs.h"; do
 155     cp_portable "$i" "$output/include/standard-headers/linux"
 156 done
 157 mkdir -p "$output/include/standard-headers/drm"
 158 cp_portable "$tmpdir/include/drm/drm_fourcc.h" \
 159             "$output/include/standard-headers/drm"
 160
 161 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 162 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 163
 164 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 165 # import of several infiniband/networking/other headers
 166 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 167 # Parse the entire file instead of single lines to match
 168 # function declarations expanding over multiple lines
 169 # and strip the declarations starting with pvrdma prefix.
 170 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 171     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 172     "$tmp_pvrdma_verbs";
 173
 174 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
 175          "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 176          "$tmp_pvrdma_verbs"; do \
 177     cp_portable "$i" \
 178          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 179 done
 180
 181 rm -rf "$output/include/standard-headers/rdma/"
 182 mkdir -p "$output/include/standard-headers/rdma/"
 183 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 184     cp_portable "$i" \
 185          "$output/include/standard-headers/rdma/"
 186 done
 187
 188 cat <<EOF >$output/include/standard-headers/linux/types.h
 189 /* For QEMU all types are already defined via osdep.h, so this
 190  * header does not need to do anything.
 191  */
 192 EOF
 193 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 194 #define ETH_ALEN    6
 195 EOF
 196
 197 rm -rf "$tmpdir"