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 'sys/' \
40                                     > /dev/null
41    then
42        echo "Unexpected #include in input file $f".
43        exit 2
44    fi
45
46    header=$(basename "$f");
47    sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
48        -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
49        -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
50        -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
51        -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
52        -e 's/__bitwise__//' \
53        -e 's/__attribute__((packed))/QEMU_PACKED/' \
54        -e 's/__inline__/inline/' \
55        -e '/sys\/ioctl.h/d' \
56        "$f" > "$to/$header";
57}
58
59# This will pick up non-directories too (eg "Kconfig") but we will
60# ignore them in the next loop.
61ARCHLIST=$(cd "$linux/arch" && echo *)
62
63for arch in $ARCHLIST; do
64    # Discard anything which isn't a KVM-supporting architecture
65    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
66        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
67        continue
68    fi
69
70    # Blacklist architectures which have KVM headers but are actually dead
71    if [ "$arch" = "ia64" ]; then
72        continue
73    fi
74
75    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
76
77    rm -rf "$output/linux-headers/asm-$arch"
78    mkdir -p "$output/linux-headers/asm-$arch"
79    for header in kvm.h kvm_para.h; do
80        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
81    done
82    if [ $arch = powerpc ]; then
83        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
84    fi
85
86    rm -rf "$output/include/standard-headers/asm-$arch"
87    mkdir -p "$output/include/standard-headers/asm-$arch"
88    if [ $arch = s390 ]; then
89        cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
90        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
91    fi
92    if [ $arch = x86 ]; then
93        cp_portable "$tmpdir/include/asm/hyperv.h" "$output/include/standard-headers/asm-x86/"
94    fi
95done
96
97rm -rf "$output/linux-headers/linux"
98mkdir -p "$output/linux-headers/linux"
99for header in kvm.h kvm_para.h vfio.h vhost.h \
100              psci.h; do
101    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
102done
103rm -rf "$output/linux-headers/asm-generic"
104mkdir -p "$output/linux-headers/asm-generic"
105for header in kvm_para.h; do
106    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
107done
108if [ -L "$linux/source" ]; then
109    cp "$linux/source/COPYING" "$output/linux-headers"
110else
111    cp "$linux/COPYING" "$output/linux-headers"
112fi
113
114cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
115#include "standard-headers/asm-x86/hyperv.h"
116EOF
117cat <<EOF >$output/linux-headers/linux/virtio_config.h
118#include "standard-headers/linux/virtio_config.h"
119EOF
120cat <<EOF >$output/linux-headers/linux/virtio_ring.h
121#include "standard-headers/linux/virtio_ring.h"
122EOF
123
124rm -rf "$output/include/standard-headers/linux"
125mkdir -p "$output/include/standard-headers/linux"
126for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
127         "$tmpdir/include/linux/pci_regs.h"; do
128    cp_portable "$i" "$output/include/standard-headers/linux"
129done
130
131cat <<EOF >$output/include/standard-headers/linux/types.h
132#include <stdint.h>
133#include "qemu/compiler.h"
134EOF
135cat <<EOF >$output/include/standard-headers/linux/if_ether.h
136#define ETH_ALEN    6
137EOF
138
139rm -rf "$tmpdir"
140