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="$PWD"
29fi
30
31# This will pick up non-directories too (eg "Kconfig") but we will
32# ignore them in the next loop.
33ARCHLIST=$(cd "$linux/arch" && echo *)
34
35for arch in $ARCHLIST; do
36    # Discard anything which isn't a KVM-supporting architecture
37    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
38        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
39        continue
40    fi
41
42    # Blacklist architectures which have KVM headers but are actually dead
43    if [ "$arch" = "ia64" ]; then
44        continue
45    fi
46
47    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
48
49    rm -rf "$output/linux-headers/asm-$arch"
50    mkdir -p "$output/linux-headers/asm-$arch"
51    for header in kvm.h kvm_para.h; do
52        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
53    done
54    if [ $arch = x86 ]; then
55        cp "$tmpdir/include/asm/hyperv.h" "$output/linux-headers/asm-x86"
56    fi
57done
58
59rm -rf "$output/linux-headers/linux"
60mkdir -p "$output/linux-headers/linux"
61for header in kvm.h kvm_para.h vfio.h vhost.h virtio_config.h virtio_ring.h; do
62    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
63done
64rm -rf "$output/linux-headers/asm-generic"
65mkdir -p "$output/linux-headers/asm-generic"
66for header in kvm_para.h; do
67    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
68done
69if [ -L "$linux/source" ]; then
70    cp "$linux/source/COPYING" "$output/linux-headers"
71else
72    cp "$linux/COPYING" "$output/linux-headers"
73fi
74
75rm -rf "$tmpdir"
76