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