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 'limits' \
  43                                      -e 'linux/kernel' \
  44                                      -e 'linux/sysinfo' \
  45                                      > /dev/null
  46     then
  47         echo "Unexpected #include in input file $f".
  48         exit 2
  49     fi
  50
  51     header=$(basename "$f");
  52     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  53         -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
  54         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  55         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  56         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  57         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  58         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  59         -e 's/__bitwise//' \
  60         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  61         -e 's/__inline__/inline/' \
  62         -e '/sys\/ioctl.h/d' \
  63         -e 's/SW_MAX/SW_MAX_/' \
  64         -e 's/atomic_t/int/' \
  65         -e 's/__kernel_long_t/long/' \
  66         -e 's/__kernel_ulong_t/unsigned long/' \
  67         -e 's/struct ethhdr/struct eth_header/' \
  68         -e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
  69         "$f" > "$to/$header";
  70 }
  71
  72 # This will pick up non-directories too (eg "Kconfig") but we will
  73 # ignore them in the next loop.
  74 ARCHLIST=$(cd "$linux/arch" && echo *)
  75
  76 for arch in $ARCHLIST; do
  77     # Discard anything which isn't a KVM-supporting architecture
  78     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  79         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  80         continue
  81     fi
  82
  83     # Blacklist architectures which have KVM headers but are actually dead
  84     if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
  85         continue
  86     fi
  87
  88     if [ "$arch" = x86 ]; then
  89         arch_var=SRCARCH
  90     else
  91         arch_var=ARCH
  92     fi
  93
  94     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
  95
  96     rm -rf "$output/linux-headers/asm-$arch"
  97     mkdir -p "$output/linux-headers/asm-$arch"
  98     for header in kvm.h kvm_para.h unistd.h; do
  99         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
 100     done
 101     if [ $arch = powerpc ]; then
 102         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
 103     fi
 104
 105     rm -rf "$output/include/standard-headers/asm-$arch"
 106     mkdir -p "$output/include/standard-headers/asm-$arch"
 107     if [ $arch = s390 ]; then
 108         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 109     fi
 110     if [ $arch = arm ]; then
 111         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 112         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 113         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 114     fi
 115     if [ $arch = x86 ]; then
 116         cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
 117         /* this is a temporary placeholder until kvm_para.h stops including it */
 118 EOF
 119         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 120         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 121         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 122     fi
 123 done
 124
 125 rm -rf "$output/linux-headers/linux"
 126 mkdir -p "$output/linux-headers/linux"
 127 for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
 128               psci.h userfaultfd.h; do
 129     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 130 done
 131 rm -rf "$output/linux-headers/asm-generic"
 132 mkdir -p "$output/linux-headers/asm-generic"
 133 for header in kvm_para.h; do
 134     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 135 done
 136 if [ -L "$linux/source" ]; then
 137     cp "$linux/source/COPYING" "$output/linux-headers"
 138 else
 139     cp "$linux/COPYING" "$output/linux-headers"
 140 fi
 141
 142 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 143 #include "standard-headers/asm-x86/hyperv.h"
 144 EOF
 145 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 146 #include "standard-headers/linux/virtio_config.h"
 147 EOF
 148 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 149 #include "standard-headers/linux/virtio_ring.h"
 150 EOF
 151
 152 rm -rf "$output/include/standard-headers/linux"
 153 mkdir -p "$output/include/standard-headers/linux"
 154 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 155          "$tmpdir/include/linux/input-event-codes.h" \
 156          "$tmpdir/include/linux/pci_regs.h" \
 157          "$tmpdir/include/linux/ethtool.h" "$tmpdir/include/linux/kernel.h" \
 158          "$tmpdir/include/linux/sysinfo.h"; do
 159     cp_portable "$i" "$output/include/standard-headers/linux"
 160 done
 161
 162 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 163 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 164
 165 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 166 # import of several infiniband/networking/other headers
 167 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 168 # Parse the entire file instead of single lines to match
 169 # function declarations expanding over multiple lines
 170 # and strip the declarations starting with pvrdma prefix.
 171 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 172     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 173     "$tmp_pvrdma_verbs";
 174
 175 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
 176          "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 177          "$tmp_pvrdma_verbs"; do \
 178     cp_portable "$i" \
 179          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 180 done
 181
 182 rm -rf "$output/include/standard-headers/rdma/"
 183 mkdir -p "$output/include/standard-headers/rdma/"
 184 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 185     cp_portable "$i" \
 186          "$output/include/standard-headers/rdma/"
 187 done
 188
 189 cat <<EOF >$output/include/standard-headers/linux/types.h
 190 /* For QEMU all types are already defined via osdep.h, so this
 191  * header does not need to do anything.
 192  */
 193 EOF
 194 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 195 #define ETH_ALEN    6
 196 EOF
 197
 198 rm -rf "$tmpdir"