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        -e 's/SW_MAX/SW_MAX_/' \
57        "$f" > "$to/$header";
58}
59
60# This will pick up non-directories too (eg "Kconfig") but we will
61# ignore them in the next loop.
62ARCHLIST=$(cd "$linux/arch" && echo *)
63
64for arch in $ARCHLIST; do
65    # Discard anything which isn't a KVM-supporting architecture
66    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
67        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
68        continue
69    fi
70
71    # Blacklist architectures which have KVM headers but are actually dead
72    if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
73        continue
74    fi
75
76    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
77
78    rm -rf "$output/linux-headers/asm-$arch"
79    mkdir -p "$output/linux-headers/asm-$arch"
80    for header in kvm.h kvm_para.h unistd.h; do
81        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
82    done
83    if [ $arch = powerpc ]; then
84        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
85    fi
86
87    rm -rf "$output/include/standard-headers/asm-$arch"
88    mkdir -p "$output/include/standard-headers/asm-$arch"
89    if [ $arch = s390 ]; then
90        cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
91        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
92    fi
93    if [ $arch = x86 ]; then
94        cp_portable "$tmpdir/include/asm/hyperv.h" "$output/include/standard-headers/asm-x86/"
95        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
96        cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
97        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
98    fi
99done
100
101rm -rf "$output/linux-headers/linux"
102mkdir -p "$output/linux-headers/linux"
103for header in kvm.h kvm_para.h vfio.h vhost.h \
104              psci.h; do
105    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
106done
107rm -rf "$output/linux-headers/asm-generic"
108mkdir -p "$output/linux-headers/asm-generic"
109for header in kvm_para.h; do
110    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
111done
112if [ -L "$linux/source" ]; then
113    cp "$linux/source/COPYING" "$output/linux-headers"
114else
115    cp "$linux/COPYING" "$output/linux-headers"
116fi
117
118cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
119#include "standard-headers/asm-x86/hyperv.h"
120EOF
121cat <<EOF >$output/linux-headers/linux/virtio_config.h
122#include "standard-headers/linux/virtio_config.h"
123EOF
124cat <<EOF >$output/linux-headers/linux/virtio_ring.h
125#include "standard-headers/linux/virtio_ring.h"
126EOF
127
128rm -rf "$output/include/standard-headers/linux"
129mkdir -p "$output/include/standard-headers/linux"
130for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
131         "$tmpdir/include/linux/pci_regs.h"; do
132    cp_portable "$i" "$output/include/standard-headers/linux"
133done
134
135cat <<EOF >$output/include/standard-headers/linux/types.h
136#include <stdint.h>
137#include "qemu/compiler.h"
138EOF
139cat <<EOF >$output/include/standard-headers/linux/if_ether.h
140#define ETH_ALEN    6
141EOF
142
143rm -rf "$tmpdir"
144