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                                      -e 'asm-generic/kvm_para' \
  47                                      > /dev/null
  48     then
  49         echo "Unexpected #include in input file $f".
  50         exit 2
  51     fi
  52
  53     header=$(basename "$f");
  54     sed -e 's/__aligned_u64/__u64 __attribute__((aligned(8)))/g' \
  55         -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  56         -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
  57         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  58         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  59         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  60         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  61         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  62         -e 's/__bitwise//' \
  63         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  64         -e 's/__inline__/inline/' \
  65         -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
  66         -e '/\"drm.h\"/d' \
  67         -e '/sys\/ioctl.h/d' \
  68         -e 's/SW_MAX/SW_MAX_/' \
  69         -e 's/atomic_t/int/' \
  70         -e 's/__kernel_long_t/long/' \
  71         -e 's/__kernel_ulong_t/unsigned long/' \
  72         -e 's/struct ethhdr/struct eth_header/' \
  73         -e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
  74         "$f" > "$to/$header";
  75 }
  76
  77 # This will pick up non-directories too (eg "Kconfig") but we will
  78 # ignore them in the next loop.
  79 ARCHLIST=$(cd "$linux/arch" && echo *)
  80
  81 for arch in $ARCHLIST; do
  82     # Discard anything which isn't a KVM-supporting architecture
  83     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  84         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  85         continue
  86     fi
  87
  88     if [ "$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 unistd.h bitsperlong.h; do
  99         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
 100     done
 101
 102     if [ $arch = mips ]; then
 103         cp "$tmpdir/include/asm/sgidefs.h" "$output/linux-headers/asm-mips/"
 104     fi
 105
 106     rm -rf "$output/include/standard-headers/asm-$arch"
 107     mkdir -p "$output/include/standard-headers/asm-$arch"
 108     if [ $arch = s390 ]; then
 109         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 110         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
 111         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
 112     fi
 113     if [ $arch = arm ]; then
 114         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 115         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 116         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 117     fi
 118     if [ $arch = x86 ]; then
 119         cp "$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" "$output/linux-headers/asm-x86/"
 122         cp_portable "$tmpdir/include/asm/kvm_para.h" "$output/include/standard-headers/asm-$arch"
 123         # Remove everything except the macros from bootparam.h avoiding the
 124         # unnecessary import of several video/ist/etc headers
 125         sed -e '/__ASSEMBLY__/,/__ASSEMBLY__/d' \
 126                "$tmpdir/include/asm/bootparam.h" > "$tmpdir/bootparam.h"
 127         cp_portable "$tmpdir/bootparam.h" \
 128                     "$output/include/standard-headers/asm-$arch"
 129     fi
 130 done
 131
 132 rm -rf "$output/linux-headers/linux"
 133 mkdir -p "$output/linux-headers/linux"
 134 for header in kvm.h vfio.h vfio_ccw.h vhost.h \
 135               psci.h psp-sev.h userfaultfd.h; do
 136     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 137 done
 138
 139 rm -rf "$output/linux-headers/asm-generic"
 140 mkdir -p "$output/linux-headers/asm-generic"
 141 for header in unistd.h bitsperlong.h; do
 142     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 143 done
 144
 145 if [ -L "$linux/source" ]; then
 146     cp "$linux/source/COPYING" "$output/linux-headers"
 147 else
 148     cp "$linux/COPYING" "$output/linux-headers"
 149 fi
 150
 151 # Recent kernel sources split the copyright/license info into multiple
 152 # files, which we need to copy. This set of licenses is the set that
 153 # are referred to by SPDX lines in the headers we currently copy.
 154 # We don't copy the Documentation/process/license-rules.rst which
 155 # is also referred to by COPYING, since it's explanatory rather than license.
 156 if [ -d "$linux/LICENSES" ]; then
 157     mkdir -p "$output/linux-headers/LICENSES/preferred" \
 158              "$output/linux-headers/LICENSES/exceptions"
 159     for l in preferred/GPL-2.0 preferred/BSD-2-Clause preferred/BSD-3-Clause \
 160              exceptions/Linux-syscall-note; do
 161         cp "$linux/LICENSES/$l" "$output/linux-headers/LICENSES/$l"
 162     done
 163 fi
 164
 165 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 166 #include "standard-headers/linux/virtio_config.h"
 167 EOF
 168 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 169 #include "standard-headers/linux/virtio_ring.h"
 170 EOF
 171
 172 rm -rf "$output/include/standard-headers/linux"
 173 mkdir -p "$output/include/standard-headers/linux"
 174 for i in "$tmpdir"/include/linux/*virtio*.h \
 175          "$tmpdir/include/linux/qemu_fw_cfg.h" \
 176          "$tmpdir/include/linux/input.h" \
 177          "$tmpdir/include/linux/input-event-codes.h" \
 178          "$tmpdir/include/linux/pci_regs.h" \
 179          "$tmpdir/include/linux/ethtool.h" "$tmpdir/include/linux/kernel.h" \
 180          "$tmpdir/include/linux/sysinfo.h"; do
 181     cp_portable "$i" "$output/include/standard-headers/linux"
 182 done
 183 mkdir -p "$output/include/standard-headers/drm"
 184 cp_portable "$tmpdir/include/drm/drm_fourcc.h" \
 185             "$output/include/standard-headers/drm"
 186
 187 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 188 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 189
 190 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 191 # import of several infiniband/networking/other headers
 192 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 193 # Parse the entire file instead of single lines to match
 194 # function declarations expanding over multiple lines
 195 # and strip the declarations starting with pvrdma prefix.
 196 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 197     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 198     "$tmp_pvrdma_verbs";
 199
 200 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
 201          "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 202          "$tmp_pvrdma_verbs"; do \
 203     cp_portable "$i" \
 204          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 205 done
 206
 207 rm -rf "$output/include/standard-headers/rdma/"
 208 mkdir -p "$output/include/standard-headers/rdma/"
 209 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 210     cp_portable "$i" \
 211          "$output/include/standard-headers/rdma/"
 212 done
 213
 214 cat <<EOF >$output/include/standard-headers/linux/types.h
 215 /* For QEMU all types are already defined via osdep.h, so this
 216  * header does not need to do anything.
 217  */
 218 EOF
 219 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 220 #define ETH_ALEN    6
 221 EOF
 222
 223 rm -rf "$tmpdir"