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|
#!/bin/sh -e
#
# Update Linux kernel headers QEMU requires from a specified kernel tree.
#
# Copyright (C) 2011 Siemens AG
#
# Authors:
# Jan Kiszka <jan.kiszka@siemens.com>
#
# This work is licensed under the terms of the GNU GPL version 2.
# See the COPYING file in the top-level directory.
#
# The script will copy the headers into two target folders:
#
# - linux-headers/ for files that are required for compiling for a
# Linux host. Generally we have these so we can use kernel structs
# and defines that are more recent than the headers that might be
# installed on the host system. Usually this script can do simple
# file copies for these headers.
#
# - include/standard-headers/ for files that are used for guest
# device emulation and are required on all hosts. For instance, we
# get our definitions of the virtio structures from the Linux
# kernel headers, but we need those definitions regardless of which
# host OS we are building for. This script has to be careful to
# sanitize the headers to remove any use of Linux-specifics such as
# types like "__u64". This work is done in the cp_portable function.
tmpdir=$(mktemp -d)
hdrdir="$tmpdir/headers"
blddir="$tmpdir/build"
linux="$1"
output="$2"
if [ -z "$linux" ] || ! [ -d "$linux" ]; then
cat << EOF
usage: update-kernel-headers.sh LINUX_PATH [OUTPUT_PATH]
LINUX_PATH Linux kernel directory to obtain the headers from
OUTPUT_PATH output directory, usually the qemu source tree (default: $PWD)
EOF
exit 1
fi
if [ -z "$output" ]; then
output="$PWD"
fi
cp_portable() {
f=$1
to=$2
if
grep '#include' "$f" | grep -v -e 'linux/virtio' \
-e 'linux/types' \
-e 'linux/ioctl' \
-e 'stdint' \
-e 'linux/if_ether' \
-e 'input-event-codes' \
-e 'sys/' \
-e 'drm.h' \
-e 'limits' \
-e 'linux/const' \
-e 'linux/kernel' \
-e 'linux/sysinfo' \
-e 'asm/setup_data.h' \
-e 'asm/kvm_para.h' \
> /dev/null
then
echo "Unexpected #include in input file $f".
exit 2
fi
header=$(basename "$f");
if test -z "$arch"; then
# Let users of include/standard-headers/linux/ headers pick the
# asm-* header that they care about
arch_cmd='/<asm\/\([^>]*\)>/d'
else
arch_cmd='s/<asm\/\([^>]*\)>/"standard-headers\/asm-'$arch'\/\1"/'
fi
sed -e 's/__aligned_u64/__u64 __attribute__((aligned(8)))/g' \
-e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
-e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
-e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
-e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
-e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
-e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
-e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
-e "$arch_cmd" \
-e 's/__bitwise//' \
-e 's/__attribute__((packed))/QEMU_PACKED/' \
-e 's/__inline__/inline/' \
-e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
-e '/\"drm.h\"/d' \
-e '/sys\/ioctl.h/d' \
-e '/linux\/ioctl.h/d' \
-e 's/SW_MAX/SW_MAX_/' \
-e 's/atomic_t/int/' \
-e 's/__kernel_long_t/long/' \
-e 's/__kernel_ulong_t/unsigned long/' \
-e 's/struct ethhdr/struct eth_header/' \
-e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
"$f" > "$to/$header";
}
# This will pick up non-directories too (eg "Kconfig") but we will
# ignore them in the next loop.
ARCHLIST=$(cd "$linux/arch" && echo *)
for arch in $ARCHLIST; do
# Discard anything which isn't a KVM-supporting architecture
if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
continue
fi
if [ "$arch" = x86 ]; then
arch_var=SRCARCH
else
arch_var=ARCH
fi
rm -rf "$hdrdir"
make -C "$linux" O="$blddir" INSTALL_HDR_PATH="$hdrdir" $arch_var=$arch headers_install
rm -rf "$output/linux-headers/asm-$arch"
mkdir -p "$output/linux-headers/asm-$arch"
for header in kvm.h unistd.h bitsperlong.h mman.h; do
if test -f "$hdrdir/include/asm/$header"; then
cp "$hdrdir/include/asm/$header" "$output/linux-headers/asm-$arch"
elif test -f "$hdrdir/include/asm-generic/$header"; then
# not installed as <asm/$header>, but used as such in kernel sources
cat <<EOF >$output/linux-headers/asm-$arch/$header
#include <asm-generic/$header>
EOF
fi
done
if [ $arch = mips ]; then
cp "$hdrdir/include/asm/sgidefs.h" "$output/linux-headers/asm-mips/"
cp "$hdrdir/include/asm/unistd_o32.h" "$output/linux-headers/asm-mips/"
cp "$hdrdir/include/asm/unistd_n32.h" "$output/linux-headers/asm-mips/"
cp "$hdrdir/include/asm/unistd_n64.h" "$output/linux-headers/asm-mips/"
fi
if [ $arch = powerpc ]; then
cp "$hdrdir/include/asm/unistd_32.h" "$output/linux-headers/asm-powerpc/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-powerpc/"
fi
rm -rf "$output/include/standard-headers/asm-$arch"
mkdir -p "$output/include/standard-headers/asm-$arch"
if [ $arch = s390 ]; then
cp_portable "$hdrdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
cp "$hdrdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
fi
if [ $arch = arm ]; then
cp "$hdrdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
cp "$hdrdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
cp "$hdrdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
fi
if [ $arch = arm64 ]; then
cp "$hdrdir/include/asm/sve_context.h" "$output/linux-headers/asm-arm64/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-arm64/"
fi
if [ $arch = x86 ]; then
cp "$hdrdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
cp "$hdrdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
cp_portable "$hdrdir/include/asm/kvm_para.h" "$output/include/standard-headers/asm-$arch"
cat <<EOF >$output/linux-headers/asm-$arch/kvm_para.h
#include "standard-headers/asm-$arch/kvm_para.h"
EOF
# Remove everything except the macros from bootparam.h avoiding the
# unnecessary import of several video/ist/etc headers
sed -e '/__ASSEMBLY__/,/__ASSEMBLY__/d' \
"$hdrdir/include/asm/bootparam.h" > "$hdrdir/bootparam.h"
cp_portable "$hdrdir/bootparam.h" \
"$output/include/standard-headers/asm-$arch"
cp_portable "$hdrdir/include/asm/setup_data.h" \
"$output/include/standard-headers/asm-x86"
fi
if [ $arch = riscv ]; then
cp "$hdrdir/include/asm/ptrace.h" "$output/linux-headers/asm-riscv/"
cp "$hdrdir/include/asm/unistd_32.h" "$output/linux-headers/asm-riscv/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-riscv/"
fi
if [ $arch = loongarch ]; then
cp "$hdrdir/include/asm/kvm_para.h" "$output/linux-headers/asm-loongarch/"
cp "$hdrdir/include/asm/unistd_64.h" "$output/linux-headers/asm-loongarch/"
fi
done
arch=
rm -rf "$output/linux-headers/linux"
mkdir -p "$output/linux-headers/linux"
for header in const.h stddef.h kvm.h vfio.h vfio_ccw.h vfio_zdev.h vhost.h \
psci.h psp-sev.h userfaultfd.h memfd.h mman.h nvme_ioctl.h \
vduse.h iommufd.h bits.h; do
cp "$hdrdir/include/linux/$header" "$output/linux-headers/linux"
done
rm -rf "$output/linux-headers/asm-generic"
mkdir -p "$output/linux-headers/asm-generic"
for header in unistd.h bitsperlong.h mman-common.h mman.h hugetlb_encode.h; do
cp "$hdrdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
done
if [ -L "$linux/source" ]; then
cp "$linux/source/COPYING" "$output/linux-headers"
else
cp "$linux/COPYING" "$output/linux-headers"
fi
# Recent kernel sources split the copyright/license info into multiple
# files, which we need to copy. This set of licenses is the set that
# are referred to by SPDX lines in the headers we currently copy.
# We don't copy the Documentation/process/license-rules.rst which
# is also referred to by COPYING, since it's explanatory rather than license.
if [ -d "$linux/LICENSES" ]; then
mkdir -p "$output/linux-headers/LICENSES/preferred" \
"$output/linux-headers/LICENSES/exceptions"
for l in preferred/GPL-2.0 preferred/BSD-2-Clause preferred/BSD-3-Clause \
exceptions/Linux-syscall-note; do
cp "$linux/LICENSES/$l" "$output/linux-headers/LICENSES/$l"
done
fi
cat <<EOF >$output/linux-headers/linux/kvm_para.h
#include "standard-headers/linux/kvm_para.h"
#include <asm/kvm_para.h>
EOF
cat <<EOF >$output/linux-headers/linux/virtio_config.h
#include "standard-headers/linux/virtio_config.h"
EOF
cat <<EOF >$output/linux-headers/linux/virtio_ring.h
#include "standard-headers/linux/virtio_ring.h"
EOF
cat <<EOF >$output/linux-headers/linux/vhost_types.h
#include "standard-headers/linux/vhost_types.h"
EOF
rm -rf "$output/include/standard-headers/linux"
mkdir -p "$output/include/standard-headers/linux"
for i in "$hdrdir"/include/linux/*virtio*.h \
"$hdrdir/include/linux/qemu_fw_cfg.h" \
"$hdrdir/include/linux/fuse.h" \
"$hdrdir/include/linux/input.h" \
"$hdrdir/include/linux/input-event-codes.h" \
"$hdrdir/include/linux/udmabuf.h" \
"$hdrdir/include/linux/pci_regs.h" \
"$hdrdir/include/linux/ethtool.h" \
"$hdrdir/include/linux/const.h" \
"$hdrdir/include/linux/kernel.h" \
"$hdrdir/include/linux/kvm_para.h" \
"$hdrdir/include/linux/vhost_types.h" \
"$hdrdir/include/linux/vmclock-abi.h" \
"$hdrdir/include/linux/sysinfo.h"; do
cp_portable "$i" "$output/include/standard-headers/linux"
done
mkdir -p "$output/include/standard-headers/misc"
cp_portable "$hdrdir/include/misc/pvpanic.h" \
"$output/include/standard-headers/misc"
mkdir -p "$output/include/standard-headers/drm"
cp_portable "$hdrdir/include/drm/drm_fourcc.h" \
"$output/include/standard-headers/drm"
cat <<EOF >$output/include/standard-headers/linux/types.h
/* For QEMU all types are already defined via osdep.h, so this
* header does not need to do anything.
*/
EOF
cat <<EOF >$output/include/standard-headers/linux/if_ether.h
#define ETH_ALEN 6
EOF
rm -rf "$tmpdir"
|
