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