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_virtio() {
32    from=$1
33    to=$2
34    virtio=$(find "$from" -name '*virtio*h' -o -name "input.h")
35    if [ "$virtio" ]; then
36        rm -rf "$to"
37        mkdir -p "$to"
38        for f in $virtio; do
39            if
40                grep '#include' "$f" | grep -v -e 'linux/virtio' \
41                                             -e 'linux/types' \
42                                             -e 'linux/if_ether' \
43                                             -e 'sys/' \
44                                             > /dev/null
45            then
46                echo "Unexpected #include in input file $f".
47                exit 2
48            fi
49
50            header=$(basename "$f");
51            sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
52                -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
53                -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
54                -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
55                -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
56                -e 's/__bitwise__//' \
57                -e 's/__attribute__((packed))/QEMU_PACKED/' \
58                -e 's/__inline__/inline/' \
59                "$f" > "$to/$header";
60        done
61    fi
62}
63
64# This will pick up non-directories too (eg "Kconfig") but we will
65# ignore them in the next loop.
66ARCHLIST=$(cd "$linux/arch" && echo *)
67
68for arch in $ARCHLIST; do
69    # Discard anything which isn't a KVM-supporting architecture
70    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
71        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
72        continue
73    fi
74
75    # Blacklist architectures which have KVM headers but are actually dead
76    if [ "$arch" = "ia64" ]; then
77        continue
78    fi
79
80    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
81
82    rm -rf "$output/linux-headers/asm-$arch"
83    mkdir -p "$output/linux-headers/asm-$arch"
84    for header in kvm.h kvm_para.h; do
85        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
86    done
87    if [ $arch = x86 ]; then
88        cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
89    fi
90    if [ $arch = powerpc ]; then
91        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
92    fi
93
94    cp_virtio "$tmpdir/include/asm" "$output/include/standard-headers/asm-$arch"
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/linux/virtio_config.h
115#include "standard-headers/linux/virtio_config.h"
116EOF
117cat <<EOF >$output/linux-headers/linux/virtio_ring.h
118#include "standard-headers/linux/virtio_ring.h"
119EOF
120
121cp_virtio "$tmpdir/include/linux/" "$output/include/standard-headers/linux"
122
123cat <<EOF >$output/include/standard-headers/linux/types.h
124#include <stdint.h>
125#include "qemu/compiler.h"
126EOF
127cat <<EOF >$output/include/standard-headers/linux/if_ether.h
128#define ETH_ALEN    6
129EOF
130
131rm -rf "$tmpdir"
132