xref: /openbmc/qemu/scripts/update-linux-headers.sh (revision 9d8ad11429fed6c54dcc7e0018dcb494927e3440) 
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                                     > /dev/null
43    then
44        echo "Unexpected #include in input file $f".
45        exit 2
46    fi
47
48    header=$(basename "$f");
49    sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
50        -e 's/u\([0-9][0-9]*\)/uint\1_t/g' \
51        -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
52        -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
53        -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
54        -e 's/"\(input-event-codes\.h\)"/"standard-headers\/linux\/\1"/' \
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        -e 's/__BITS_PER_LONG/HOST_LONG_BITS/' \
60        -e '/sys\/ioctl.h/d' \
61        -e 's/SW_MAX/SW_MAX_/' \
62        -e 's/atomic_t/int/' \
63        "$f" > "$to/$header";
64}
65
66# This will pick up non-directories too (eg "Kconfig") but we will
67# ignore them in the next loop.
68ARCHLIST=$(cd "$linux/arch" && echo *)
69
70for arch in $ARCHLIST; do
71    # Discard anything which isn't a KVM-supporting architecture
72    if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
73        ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
74        continue
75    fi
76
77    # Blacklist architectures which have KVM headers but are actually dead
78    if [ "$arch" = "ia64" -o "$arch" = "mips" ]; then
79        continue
80    fi
81
82    if [ "$arch" = x86 ]; then
83        arch_var=SRCARCH
84    else
85        arch_var=ARCH
86    fi
87
88    make -C "$linux" INSTALL_HDR_PATH="$tmpdir" $arch_var=$arch headers_install
89
90    rm -rf "$output/linux-headers/asm-$arch"
91    mkdir -p "$output/linux-headers/asm-$arch"
92    for header in kvm.h kvm_para.h unistd.h; do
93        cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
94    done
95    if [ $arch = powerpc ]; then
96        cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
97    fi
98
99    rm -rf "$output/include/standard-headers/asm-$arch"
100    mkdir -p "$output/include/standard-headers/asm-$arch"
101    if [ $arch = s390 ]; then
102        cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
103        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-s390/"
104        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-s390/"
105    fi
106    if [ $arch = arm ]; then
107        cp "$tmpdir/include/asm/unistd-eabi.h" "$output/linux-headers/asm-arm/"
108        cp "$tmpdir/include/asm/unistd-oabi.h" "$output/linux-headers/asm-arm/"
109        cp "$tmpdir/include/asm/unistd-common.h" "$output/linux-headers/asm-arm/"
110    fi
111    if [ $arch = x86 ]; then
112        cat <<-EOF >"$output/include/standard-headers/asm-x86/hyperv.h"
113        /* this is a temporary placeholder until kvm_para.h stops including it */
114EOF
115        cp "$tmpdir/include/asm/unistd_32.h" "$output/linux-headers/asm-x86/"
116        cp "$tmpdir/include/asm/unistd_x32.h" "$output/linux-headers/asm-x86/"
117        cp "$tmpdir/include/asm/unistd_64.h" "$output/linux-headers/asm-x86/"
118    fi
119done
120
121rm -rf "$output/linux-headers/linux"
122mkdir -p "$output/linux-headers/linux"
123for header in kvm.h kvm_para.h vfio.h vfio_ccw.h vhost.h \
124              psci.h psp-sev.h userfaultfd.h; do
125    cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
126done
127rm -rf "$output/linux-headers/asm-generic"
128mkdir -p "$output/linux-headers/asm-generic"
129for header in kvm_para.h; do
130    cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
131done
132if [ -L "$linux/source" ]; then
133    cp "$linux/source/COPYING" "$output/linux-headers"
134else
135    cp "$linux/COPYING" "$output/linux-headers"
136fi
137
138cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
139#include "standard-headers/asm-x86/hyperv.h"
140EOF
141cat <<EOF >$output/linux-headers/linux/virtio_config.h
142#include "standard-headers/linux/virtio_config.h"
143EOF
144cat <<EOF >$output/linux-headers/linux/virtio_ring.h
145#include "standard-headers/linux/virtio_ring.h"
146EOF
147
148rm -rf "$output/include/standard-headers/linux"
149mkdir -p "$output/include/standard-headers/linux"
150for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
151         "$tmpdir/include/linux/input-event-codes.h" \
152         "$tmpdir/include/linux/pci_regs.h"; do
153    cp_portable "$i" "$output/include/standard-headers/linux"
154done
155
156rm -rf "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
157mkdir -p "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma"
158
159# Remove the unused functions from pvrdma_verbs.h avoiding the unnecessary
160# import of several infiniband/networking/other headers
161tmp_pvrdma_verbs="$tmpdir/pvrdma_verbs.h"
162# Parse the entire file instead of single lines to match
163# function declarations expanding over multiple lines
164# and strip the declarations starting with pvrdma prefix.
165sed  -e '1h;2,$H;$!d;g'  -e 's/[^};]*pvrdma[^(| ]*([^)]*);//g' \
166    "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h" > \
167    "$tmp_pvrdma_verbs";
168
169for i in "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h" \
170         "$linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h" \
171         "$tmp_pvrdma_verbs"; do \
172    cp_portable "$i" \
173         "$output/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/"
174done
175
176rm -rf "$output/include/standard-headers/rdma/"
177mkdir -p "$output/include/standard-headers/rdma/"
178for i in "$tmpdir/include/rdma/vmw_pvrdma-abi.h"; do
179    cp_portable "$i" \
180         "$output/include/standard-headers/rdma/"
181done
182
183cat <<EOF >$output/include/standard-headers/linux/types.h
184/* For QEMU all types are already defined via osdep.h, so this
185 * header does not need to do anything.
186 */
187EOF
188cat <<EOF >$output/include/standard-headers/linux/if_ether.h
189#define ETH_ALEN    6
190EOF
191
192rm -rf "$tmpdir"
193