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
13tmpdir=$(mktemp -d)
14linux="$1"
15output="$2"
16
17if [ -z "$linux" ] || ! [ -d "$linux" ]; then
18    cat << EOF
19usage: update-kernel-headers.sh LINUX_PATH [OUTPUT_PATH]
20
21LINUX_PATH      Linux kernel directory to obtain the headers from
22OUTPUT_PATH     output directory, usually the qemu source tree (default: $PWD)
23EOF
24    exit 1
25fi
26
27if [ -z "$output" ]; then
28    output="$PWD"
29fi
30
31cp_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                                     > /dev/null
42    then
43        echo "Unexpected #include in input file $f".
44        exit 2
45    fi
46
47    header=$(basename "$f");
48    sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
49        -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
50        -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
51        -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
52        -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
53        -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
54        -e 's/__bitwise//' \
55        -e 's/__attribute__((packed))/QEMU_PACKED/' \
56        -e 's/__inline__/inline/' \
57        -e '/sys\/ioctl.h/d' \
58        -e 's/SW_MAX/SW_MAX_/' \
59        "$f" > "$to/$header";
60}
61
62# This will pick up non-directories too (eg "Kconfig") but we will
63# ignore them in the next loop.
64ARCHLIST=$(cd "$linux/arch" && echo *)
65
66for arch in $ARCHLIST; do
67    # Discard anything which isn't a KVM-supporting architecture
68    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
69        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
70        continue
71    fi
72
73    # Blacklist architectures which have KVM headers but are actually dead
74    if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
75        continue
76    fi
77
78    if [ "$arch" = x86 ]; then
79        arch_var=SRCARCH
80    else
81        arch_var=ARCH
82    fi
83
84    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
85
86    rm -rf "$output/linux-headers/asm-$arch"
87    mkdir -p "$output/linux-headers/asm-$arch"
88    for header in kvm.h kvm_para.h unistd.h; do
89        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
90    done
91    if [ $arch = powerpc ]; then
92        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
93    fi
94
95    rm -rf "$output/include/standard-headers/asm-$arch"
96    mkdir -p "$output/include/standard-headers/asm-$arch"
97    if [ $arch = s390 ]; then
98        cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
99        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
100    fi
101    if [ $arch = arm ]; then
102        cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
103        cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
104        cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
105    fi
106    if [ $arch = x86 ]; then
107        cp_portable "$tmpdir/include/asm/hyperv.h" "$output/include/standard-headers/asm-x86/"
108        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
109        cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
110        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
111    fi
112done
113
114rm -rf "$output/linux-headers/linux"
115mkdir -p "$output/linux-headers/linux"
116for header in kvm.h kvm_para.h vfio.h vhost.h \
117              psci.h userfaultfd.h; do
118    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
119done
120rm -rf "$output/linux-headers/asm-generic"
121mkdir -p "$output/linux-headers/asm-generic"
122for header in kvm_para.h; do
123    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
124done
125if [ -L "$linux/source" ]; then
126    cp "$linux/source/COPYING" "$output/linux-headers"
127else
128    cp "$linux/COPYING" "$output/linux-headers"
129fi
130
131cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
132#include "standard-headers/asm-x86/hyperv.h"
133EOF
134cat <<EOF >$output/linux-headers/linux/virtio_config.h
135#include "standard-headers/linux/virtio_config.h"
136EOF
137cat <<EOF >$output/linux-headers/linux/virtio_ring.h
138#include "standard-headers/linux/virtio_ring.h"
139EOF
140
141rm -rf "$output/include/standard-headers/linux"
142mkdir -p "$output/include/standard-headers/linux"
143for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
144         "$tmpdir/include/linux/input-event-codes.h" \
145         "$tmpdir/include/linux/pci_regs.h"; do
146    cp_portable "$i" "$output/include/standard-headers/linux"
147done
148
149cat <<EOF >$output/include/standard-headers/linux/types.h
150/* For QEMU all types are already defined via osdep.h, so this
151 * header does not need to do anything.
152 */
153EOF
154cat <<EOF >$output/include/standard-headers/linux/if_ether.h
155#define ETH_ALEN    6
156EOF
157
158rm -rf "$tmpdir"
159