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