xref: /qemu/scripts/update-linux-headers.sh (revision 4a4ff4c58fd750cde01c8b15d30d038cefc90a42) 
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                                     -e 'pvrdma_verbs' \
42                                     -e 'drm.h' \
43                                     -e 'limits' \
44                                     -e 'linux/kernel' \
45                                     -e 'linux/sysinfo' \
46                                     > /dev/null
47    then
48        echo "Unexpected #include in input file $f".
49        exit 2
50    fi
51
52    header=$(basename "$f");
53    sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
54        -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
55        -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
56        -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
57        -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
58        -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
59        -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
60        -e 's/__bitwise//' \
61        -e 's/__attribute__((packed))/QEMU_PACKED/' \
62        -e 's/__inline__/inline/' \
63        -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
64        -e '/\"drm.h\"/d' \
65        -e '/sys\/ioctl.h/d' \
66        -e 's/SW_MAX/SW_MAX_/' \
67        -e 's/atomic_t/int/' \
68        -e 's/__kernel_long_t/long/' \
69        -e 's/__kernel_ulong_t/unsigned long/' \
70        -e 's/struct ethhdr/struct eth_header/' \
71        -e '/\#define _LINUX_ETHTOOL_H/a \\n\#include "net/eth.h"' \
72        "$f" > "$to/$header";
73}
74
75# This will pick up non-directories too (eg "Kconfig") but we will
76# ignore them in the next loop.
77ARCHLIST=$(cd "$linux/arch" && echo *)
78
79for arch in $ARCHLIST; do
80    # Discard anything which isn't a KVM-supporting architecture
81    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
82        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
83        continue
84    fi
85
86    # Blacklist architectures which have KVM headers but are actually dead
87    if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
88        continue
89    fi
90
91    if [ "$arch" = x86 ]; then
92        arch_var=SRCARCH
93    else
94        arch_var=ARCH
95    fi
96
97    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
98
99    rm -rf "$output/linux-headers/asm-$arch"
100    mkdir -p "$output/linux-headers/asm-$arch"
101    for header in kvm.h kvm_para.h unistd.h; do
102        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
103    done
104    if [ $arch = powerpc ]; then
105        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
106    fi
107
108    rm -rf "$output/include/standard-headers/asm-$arch"
109    mkdir -p "$output/include/standard-headers/asm-$arch"
110    if [ $arch = s390 ]; then
111        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
112        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
113        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
114    fi
115    if [ $arch = arm ]; then
116        cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
117        cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
118        cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
119    fi
120    if [ $arch = x86 ]; then
121        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
122        cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
123        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
124    fi
125done
126
127rm -rf "$output/linux-headers/linux"
128mkdir -p "$output/linux-headers/linux"
129for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
130              psci.h psp-sev.h userfaultfd.h; do
131    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
132done
133rm -rf "$output/linux-headers/asm-generic"
134mkdir -p "$output/linux-headers/asm-generic"
135for header in kvm_para.h; do
136    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
137done
138if [ -L "$linux/source" ]; then
139    cp "$linux/source/COPYING" "$output/linux-headers"
140else
141    cp "$linux/COPYING" "$output/linux-headers"
142fi
143
144cat <<EOF >$output/linux-headers/linux/virtio_config.h
145#include "standard-headers/linux/virtio_config.h"
146EOF
147cat <<EOF >$output/linux-headers/linux/virtio_ring.h
148#include "standard-headers/linux/virtio_ring.h"
149EOF
150
151rm -rf "$output/include/standard-headers/linux"
152mkdir -p "$output/include/standard-headers/linux"
153for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
154         "$tmpdir/include/linux/input-event-codes.h" \
155         "$tmpdir/include/linux/pci_regs.h" \
156         "$tmpdir/include/linux/ethtool.h" "$tmpdir/include/linux/kernel.h" \
157         "$tmpdir/include/linux/sysinfo.h"; do
158    cp_portable "$i" "$output/include/standard-headers/linux"
159done
160mkdir -p "$output/include/standard-headers/drm"
161cp_portable "$tmpdir/include/drm/drm_fourcc.h" \
162            "$output/include/standard-headers/drm"
163
164rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
165mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
166
167# Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
168# import of several infiniband/networking/other headers
169tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
170# Parse the entire file instead of single lines to match
171# function declarations expanding over multiple lines
172# and strip the declarations starting with pvrdma prefix.
173sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
174    "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
175    "$tmp_pvrdma_verbs";
176
177for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
178         "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
179         "$tmp_pvrdma_verbs"; do \
180    cp_portable "$i" \
181         "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
182done
183
184rm -rf "$output/include/standard-headers/rdma/"
185mkdir -p "$output/include/standard-headers/rdma/"
186for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
187    cp_portable "$i" \
188         "$output/include/standard-headers/rdma/"
189done
190
191cat <<EOF >$output/include/standard-headers/linux/types.h
192/* For QEMU all types are already defined via osdep.h, so this
193 * header does not need to do anything.
194 */
195EOF
196cat <<EOF >$output/include/standard-headers/linux/if_ether.h
197#define ETH_ALEN    6
198EOF
199
200rm -rf "$tmpdir"
201