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                                      -e 'limits' \
  44                                      -e 'linux/kernel' \
  45                                      -e 'linux/sysinfo' \
  46                                      > /dev/null
  47     then
  48         echo "Unexpected #include in input file $f".
  49         exit 2
  50     fi
  51
  52     header=$(basename "$f");
  53     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  54         -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
  55         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  56         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  57         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  58         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  59         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  60         -e 's/__bitwise//' \
  61         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  62         -e 's/__inline__/inline/' \
  63         -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
  64         -e '/\"drm.h\"/d' \
  65         -e '/sys\/ioctl.h/d' \
  66         -e 's/SW_MAX/SW_MAX_/' \
  67         -e 's/atomic_t/int/' \
  68         -e 's/__kernel_long_t/long/' \
  69         -e 's/__kernel_ulong_t/unsigned long/' \
  70         -e 's/struct ethhdr/struct eth_header/' \
  71         -e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
  72         "$f" > "$to/$header";
  73 }
  74
  75 # This will pick up non-directories too (eg "Kconfig") but we will
  76 # ignore them in the next loop.
  77 ARCHLIST=$(cd "$linux/arch" && echo *)
  78
  79 for arch in $ARCHLIST; do
  80     # Discard anything which isn't a KVM-supporting architecture
  81     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  82         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  83         continue
  84     fi
  85
  86     # Blacklist architectures which have KVM headers but are actually dead
  87     if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
  88         continue
  89     fi
  90
  91     if [ "$arch" = x86 ]; then
  92         arch_var=SRCARCH
  93     else
  94         arch_var=ARCH
  95     fi
  96
  97     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
  98
  99     rm -rf "$output/linux-headers/asm-$arch"
 100     mkdir -p "$output/linux-headers/asm-$arch"
 101     for header in kvm.h kvm_para.h unistd.h; do
 102         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
 103     done
 104     if [ $arch = powerpc ]; then
 105         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
 106     fi
 107
 108     rm -rf "$output/include/standard-headers/asm-$arch"
 109     mkdir -p "$output/include/standard-headers/asm-$arch"
 110     if [ $arch = s390 ]; then
 111         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 112         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
 113         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
 114     fi
 115     if [ $arch = arm ]; then
 116         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 117         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 118         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 119     fi
 120     if [ $arch = x86 ]; then
 121         cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
 122         /* this is a temporary placeholder until kvm_para.h stops including it */
 123 EOF
 124         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 125         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 126         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 127     fi
 128 done
 129
 130 rm -rf "$output/linux-headers/linux"
 131 mkdir -p "$output/linux-headers/linux"
 132 for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
 133               psci.h psp-sev.h userfaultfd.h; do
 134     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 135 done
 136 rm -rf "$output/linux-headers/asm-generic"
 137 mkdir -p "$output/linux-headers/asm-generic"
 138 for header in kvm_para.h; do
 139     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 140 done
 141 if [ -L "$linux/source" ]; then
 142     cp "$linux/source/COPYING" "$output/linux-headers"
 143 else
 144     cp "$linux/COPYING" "$output/linux-headers"
 145 fi
 146
 147 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 148 #include "standard-headers/asm-x86/hyperv.h"
 149 EOF
 150 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 151 #include "standard-headers/linux/virtio_config.h"
 152 EOF
 153 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 154 #include "standard-headers/linux/virtio_ring.h"
 155 EOF
 156
 157 rm -rf "$output/include/standard-headers/linux"
 158 mkdir -p "$output/include/standard-headers/linux"
 159 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 160          "$tmpdir/include/linux/input-event-codes.h" \
 161          "$tmpdir/include/linux/pci_regs.h" \
 162          "$tmpdir/include/linux/ethtool.h" "$tmpdir/include/linux/kernel.h" \
 163          "$tmpdir/include/linux/sysinfo.h"; do
 164     cp_portable "$i" "$output/include/standard-headers/linux"
 165 done
 166 mkdir -p "$output/include/standard-headers/drm"
 167 cp_portable "$tmpdir/include/drm/drm_fourcc.h" \
 168             "$output/include/standard-headers/drm"
 169
 170 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 171 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 172
 173 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 174 # import of several infiniband/networking/other headers
 175 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 176 # Parse the entire file instead of single lines to match
 177 # function declarations expanding over multiple lines
 178 # and strip the declarations starting with pvrdma prefix.
 179 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 180     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 181     "$tmp_pvrdma_verbs";
 182
 183 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
 184          "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 185          "$tmp_pvrdma_verbs"; do \
 186     cp_portable "$i" \
 187          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 188 done
 189
 190 rm -rf "$output/include/standard-headers/rdma/"
 191 mkdir -p "$output/include/standard-headers/rdma/"
 192 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 193     cp_portable "$i" \
 194          "$output/include/standard-headers/rdma/"
 195 done
 196
 197 cat <<EOF >$output/include/standard-headers/linux/types.h
 198 /* For QEMU all types are already defined via osdep.h, so this
 199  * header does not need to do anything.
 200  */
 201 EOF
 202 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 203 #define ETH_ALEN    6
 204 EOF
 205
 206 rm -rf "$tmpdir"