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                                      -e 'pvrdma_verbs' \
  42                                      > /dev/null
  43     then
  44         echo "Unexpected #include in input file $f".
  45         exit 2
  46     fi
  47
  48     header=$(basename "$f");
  49     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  50         -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
  51         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  52         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  53         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  54         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  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         -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
  60         -e '/sys\/ioctl.h/d' \
  61         -e 's/SW_MAX/SW_MAX_/' \
  62         -e 's/atomic_t/int/' \
  63         "$f" > "$to/$header";
  64 }
  65
  66 # This will pick up non-directories too (eg "Kconfig") but we will
  67 # ignore them in the next loop.
  68 ARCHLIST=$(cd "$linux/arch" && echo *)
  69
  70 for arch in $ARCHLIST; do
  71     # Discard anything which isn't a KVM-supporting architecture
  72     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  73         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  74         continue
  75     fi
  76
  77     # Blacklist architectures which have KVM headers but are actually dead
  78     if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
  79         continue
  80     fi
  81
  82     if [ "$arch" = x86 ]; then
  83         arch_var=SRCARCH
  84     else
  85         arch_var=ARCH
  86     fi
  87
  88     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
  89
  90     rm -rf "$output/linux-headers/asm-$arch"
  91     mkdir -p "$output/linux-headers/asm-$arch"
  92     for header in kvm.h kvm_para.h unistd.h; do
  93         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  94     done
  95     if [ $arch = powerpc ]; then
  96         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  97     fi
  98
  99     rm -rf "$output/include/standard-headers/asm-$arch"
 100     mkdir -p "$output/include/standard-headers/asm-$arch"
 101     if [ $arch = s390 ]; then
 102         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 103         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
 104         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
 105     fi
 106     if [ $arch = arm ]; then
 107         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 108         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 109         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 110     fi
 111     if [ $arch = x86 ]; then
 112         cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
 113         /* this is a temporary placeholder until kvm_para.h stops including it */
 114 EOF
 115         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 116         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 117         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 118     fi
 119 done
 120
 121 rm -rf "$output/linux-headers/linux"
 122 mkdir -p "$output/linux-headers/linux"
 123 for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
 124               psci.h userfaultfd.h; do
 125     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 126 done
 127 rm -rf "$output/linux-headers/asm-generic"
 128 mkdir -p "$output/linux-headers/asm-generic"
 129 for header in kvm_para.h; do
 130     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 131 done
 132 if [ -L "$linux/source" ]; then
 133     cp "$linux/source/COPYING" "$output/linux-headers"
 134 else
 135     cp "$linux/COPYING" "$output/linux-headers"
 136 fi
 137
 138 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 139 #include "standard-headers/asm-x86/hyperv.h"
 140 EOF
 141 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 142 #include "standard-headers/linux/virtio_config.h"
 143 EOF
 144 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 145 #include "standard-headers/linux/virtio_ring.h"
 146 EOF
 147
 148 rm -rf "$output/include/standard-headers/linux"
 149 mkdir -p "$output/include/standard-headers/linux"
 150 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 151          "$tmpdir/include/linux/input-event-codes.h" \
 152          "$tmpdir/include/linux/pci_regs.h"; do
 153     cp_portable "$i" "$output/include/standard-headers/linux"
 154 done
 155
 156 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 157 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 158
 159 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 160 # import of several infiniband/networking/other headers
 161 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 162 # Parse the entire file instead of single lines to match
 163 # function declarations expanding over multiple lines
 164 # and strip the declarations starting with pvrdma prefix.
 165 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 166     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 167     "$tmp_pvrdma_verbs";
 168
 169 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
 170          "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 171          "$tmp_pvrdma_verbs"; do \
 172     cp_portable "$i" \
 173          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 174 done
 175
 176 rm -rf "$output/include/standard-headers/rdma/"
 177 mkdir -p "$output/include/standard-headers/rdma/"
 178 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 179     cp_portable "$i" \
 180          "$output/include/standard-headers/rdma/"
 181 done
 182
 183 cat <<EOF >$output/include/standard-headers/linux/types.h
 184 /* For QEMU all types are already defined via osdep.h, so this
 185  * header does not need to do anything.
 186  */
 187 EOF
 188 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 189 #define ETH_ALEN    6
 190 EOF
 191
 192 rm -rf "$tmpdir"