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 # The script will copy the headers into two target folders:
  14 #
  15 # - linux-headers/ for files that are required for compiling for a
  16 #   Linux host.  Generally we have these so we can use kernel structs
  17 #   and defines that are more recent than the headers that might be
  18 #   installed on the host system.  Usually this script can do simple
  19 #   file copies for these headers.
  20 #
  21 # - include/standard-headers/ for files that are used for guest
  22 #   device emulation and are required on all hosts.  For instance, we
  23 #   get our definitions of the virtio structures from the Linux
  24 #   kernel headers, but we need those definitions regardless of which
  25 #   host OS we are building for.  This script has to be careful to
  26 #   sanitize the headers to remove any use of Linux-specifics such as
  27 #   types like "__u64".  This work is done in the cp_portable function.
  28
  29 tmpdir=$(mktemp -d)
  30 linux="$1"
  31 output="$2"
  32
  33 if [ -z "$linux" ] || ! [ -d "$linux" ]; then
  34     cat << EOF
  35 usage: update-kernel-headers.sh LINUX_PATH [OUTPUT_PATH]
  36
  37 LINUX_PATH      Linux kernel directory to obtain the headers from
  38 OUTPUT_PATH     output directory, usually the qemu source tree (default: $PWD)
  39 EOF
  40     exit 1
  41 fi
  42
  43 if [ -z "$output" ]; then
  44     output="$PWD"
  45 fi
  46
  47 cp_portable() {
  48     f=$1
  49     to=$2
  50     if
  51         grep '#include' "$f" | grep -v -e 'linux/virtio' \
  52                                      -e 'linux/types' \
  53                                      -e 'linux/ioctl' \
  54                                      -e 'stdint' \
  55                                      -e 'linux/if_ether' \
  56                                      -e 'input-event-codes' \
  57                                      -e 'sys/' \
  58                                      -e 'pvrdma_verbs' \
  59                                      -e 'drm.h' \
  60                                      -e 'limits' \
  61                                      -e 'linux/const' \
  62                                      -e 'linux/kernel' \
  63                                      -e 'linux/sysinfo' \
  64                                      -e 'asm-generic/kvm_para' \
  65                                      > /dev/null
  66     then
  67         echo "Unexpected #include in input file $f".
  68         exit 2
  69     fi
  70
  71     header=$(basename "$f");
  72     sed -e 's/__aligned_u64/__u64 __attribute__((aligned(8)))/g' \
  73         -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  74         -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
  75         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  76         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  77         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  78         -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
  79         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  80         -e 's/__bitwise//' \
  81         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  82         -e 's/__inline__/inline/' \
  83         -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
  84         -e '/\"drm.h\"/d' \
  85         -e '/sys\/ioctl.h/d' \
  86         -e '/linux\/ioctl.h/d' \
  87         -e 's/SW_MAX/SW_MAX_/' \
  88         -e 's/atomic_t/int/' \
  89         -e 's/__kernel_long_t/long/' \
  90         -e 's/__kernel_ulong_t/unsigned long/' \
  91         -e 's/struct ethhdr/struct eth_header/' \
  92         -e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
  93         "$f" > "$to/$header";
  94 }
  95
  96 # This will pick up non-directories too (eg "Kconfig") but we will
  97 # ignore them in the next loop.
  98 ARCHLIST=$(cd "$linux/arch" && echo *)
  99
 100 for arch in $ARCHLIST; do
 101     # Discard anything which isn't a KVM-supporting architecture
 102     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
 103         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
 104         continue
 105     fi
 106
 107     if [ "$arch" = x86 ]; then
 108         arch_var=SRCARCH
 109     else
 110         arch_var=ARCH
 111     fi
 112
 113     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
 114
 115     rm -rf "$output/linux-headers/asm-$arch"
 116     mkdir -p "$output/linux-headers/asm-$arch"
 117     for header in kvm.h unistd.h bitsperlong.h mman.h; do
 118         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
 119     done
 120
 121     if [ $arch = mips ]; then
 122         cp "$tmpdir/include/asm/sgidefs.h" "$output/linux-headers/asm-mips/"
 123         cp "$tmpdir/include/asm/unistd_o32.h" "$output/linux-headers/asm-mips/"
 124         cp "$tmpdir/include/asm/unistd_n32.h" "$output/linux-headers/asm-mips/"
 125         cp "$tmpdir/include/asm/unistd_n64.h" "$output/linux-headers/asm-mips/"
 126     fi
 127     if [ $arch = powerpc ]; then
 128         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-powerpc/"
 129         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-powerpc/"
 130     fi
 131
 132     rm -rf "$output/include/standard-headers/asm-$arch"
 133     mkdir -p "$output/include/standard-headers/asm-$arch"
 134     if [ $arch = s390 ]; then
 135         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
 136         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
 137         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
 138     fi
 139     if [ $arch = arm ]; then
 140         cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
 141         cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
 142         cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
 143     fi
 144     if [ $arch = arm64 ]; then
 145         cp "$tmpdir/include/asm/sve_context.h" "$output/linux-headers/asm-arm64/"
 146     fi
 147     if [ $arch = x86 ]; then
 148         cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
 149         cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
 150         cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
 151         cp_portable "$tmpdir/include/asm/kvm_para.h" "$output/include/standard-headers/asm-$arch"
 152         # Remove everything except the macros from bootparam.h avoiding the
 153         # unnecessary import of several video/ist/etc headers
 154         sed -e '/__ASSEMBLY__/,/__ASSEMBLY__/d' \
 155                "$tmpdir/include/asm/bootparam.h" > "$tmpdir/bootparam.h"
 156         cp_portable "$tmpdir/bootparam.h" \
 157                     "$output/include/standard-headers/asm-$arch"
 158     fi
 159     if [ $arch = riscv ]; then
 160         cp "$tmpdir/include/asm/ptrace.h" "$output/linux-headers/asm-riscv/"
 161     fi
 162 done
 163
 164 rm -rf "$output/linux-headers/linux"
 165 mkdir -p "$output/linux-headers/linux"
 166 for header in const.h stddef.h kvm.h vfio.h vfio_ccw.h vfio_zdev.h vhost.h \
 167               psci.h psp-sev.h userfaultfd.h memfd.h mman.h nvme_ioctl.h \
 168               vduse.h iommufd.h; do
 169     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 170 done
 171
 172 rm -rf "$output/linux-headers/asm-generic"
 173 mkdir -p "$output/linux-headers/asm-generic"
 174 for header in unistd.h bitsperlong.h mman-common.h mman.h hugetlb_encode.h; do
 175     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 176 done
 177
 178 if [ -L "$linux/source" ]; then
 179     cp "$linux/source/COPYING" "$output/linux-headers"
 180 else
 181     cp "$linux/COPYING" "$output/linux-headers"
 182 fi
 183
 184 # Recent kernel sources split the copyright/license info into multiple
 185 # files, which we need to copy. This set of licenses is the set that
 186 # are referred to by SPDX lines in the headers we currently copy.
 187 # We don't copy the Documentation/process/license-rules.rst which
 188 # is also referred to by COPYING, since it's explanatory rather than license.
 189 if [ -d "$linux/LICENSES" ]; then
 190     mkdir -p "$output/linux-headers/LICENSES/preferred" \
 191              "$output/linux-headers/LICENSES/exceptions"
 192     for l in preferred/GPL-2.0 preferred/BSD-2-Clause preferred/BSD-3-Clause \
 193              exceptions/Linux-syscall-note; do
 194         cp "$linux/LICENSES/$l" "$output/linux-headers/LICENSES/$l"
 195     done
 196 fi
 197
 198 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 199 #include "standard-headers/linux/virtio_config.h"
 200 EOF
 201 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 202 #include "standard-headers/linux/virtio_ring.h"
 203 EOF
 204 cat <<EOF >$output/linux-headers/linux/vhost_types.h
 205 #include "standard-headers/linux/vhost_types.h"
 206 EOF
 207
 208 rm -rf "$output/include/standard-headers/linux"
 209 mkdir -p "$output/include/standard-headers/linux"
 210 for i in "$tmpdir"/include/linux/*virtio*.h \
 211          "$tmpdir/include/linux/qemu_fw_cfg.h" \
 212          "$tmpdir/include/linux/fuse.h" \
 213          "$tmpdir/include/linux/input.h" \
 214          "$tmpdir/include/linux/input-event-codes.h" \
 215          "$tmpdir/include/linux/udmabuf.h" \
 216          "$tmpdir/include/linux/pci_regs.h" \
 217          "$tmpdir/include/linux/ethtool.h" \
 218          "$tmpdir/include/linux/const.h" \
 219          "$tmpdir/include/linux/kernel.h" \
 220          "$tmpdir/include/linux/vhost_types.h" \
 221          "$tmpdir/include/linux/sysinfo.h" \
 222          "$tmpdir/include/misc/pvpanic.h"; do
 223     cp_portable "$i" "$output/include/standard-headers/linux"
 224 done
 225 mkdir -p "$output/include/standard-headers/drm"
 226 cp_portable "$tmpdir/include/drm/drm_fourcc.h" \
 227             "$output/include/standard-headers/drm"
 228
 229 rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 230 mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
 231
 232 # Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
 233 # import of several infiniband/networking/other headers
 234 tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
 235 # Parse the entire file instead of single lines to match
 236 # function declarations expanding over multiple lines
 237 # and strip the declarations starting with pvrdma prefix.
 238 sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
 239     "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
 240     "$tmp_pvrdma_verbs";
 241
 242 for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
 243          "$tmp_pvrdma_verbs"; do \
 244     cp_portable "$i" \
 245          "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
 246 done
 247
 248 rm -rf "$output/include/standard-headers/rdma/"
 249 mkdir -p "$output/include/standard-headers/rdma/"
 250 for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
 251     cp_portable "$i" \
 252          "$output/include/standard-headers/rdma/"
 253 done
 254
 255 cat <<EOF >$output/include/standard-headers/linux/types.h
 256 /* For QEMU all types are already defined via osdep.h, so this
 257  * header does not need to do anything.
 258  */
 259 EOF
 260 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 261 #define ETH_ALEN    6
 262 EOF
 263
 264 rm -rf "$tmpdir"