mirror of
https://github.com/kata-containers/kata-containers.git
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fb42e38978
Update configure-hypervisor.sh to support QEMU 5.0. fixes #989 Signed-off-by: Julio Montes <julio.montes@intel.com>
571 lines
15 KiB
Bash
Executable File
571 lines
15 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright (c) 2018 Intel Corporation
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#
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# SPDX-License-Identifier: Apache-2.0
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#---------------------------------------------------------------------
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# Description: This script is the *ONLY* place where "qemu*" build options
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# should be defined.
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#
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# Note to maintainers:
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#
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# XXX: Every option group *MUST* be documented explaining why it has
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# been specified.
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#---------------------------------------------------------------------
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script_name=${0##*/}
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arch="${3:-$(uname -m)}"
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# Array of configure options.
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#
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# Each element is comprised of two parts in the form:
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#
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# tags:option
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#
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# Where,
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#
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# - 'tags' is a comma-separated list of values which denote why
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# the option is being specified.
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#
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# - 'option' is the hypervisor configuration option.
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typeset -a qemu_options
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typeset -A recognised_tags
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# Prefix were kata will be installed
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prefix=${PREFIX:-/usr}
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recognised_tags=(
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[arch]="architecture-specific"
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[functionality]="required functionality"
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[minimal]="specified to avoid building unnecessary elements"
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[misc]="miscellaneous"
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[security]="specified for security reasons"
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[size]="minimise binary size"
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[speed]="maximise startup speed"
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)
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# Display message to stderr and exit indicating script failed.
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die() {
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local msg="$*"
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echo >&2 "$script_name: ERROR: $msg"
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exit 1
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}
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# Display usage to stdout.
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usage() {
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cat <<EOT
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Overview:
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Display configure options required to build the specified
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hypervisor.
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Usage:
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$script_name [options] <hypervisor-name>
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Options:
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-d : Dump all options along with the tags explaining why each option
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is specified.
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-h : Display this help.
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-m : Display options one per line (includes continuation characters).
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-s : Generate options to build static
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Example:
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$ $script_name qemu
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EOT
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}
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show_tags_header() {
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local keys
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local key
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local value
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cat <<EOT
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# Recognised option tags:
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#
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EOT
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# sort the tags
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keys=${!recognised_tags[@]}
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keys=$(echo "$keys" | tr ' ' '\n' | sort -u)
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for key in $keys; do
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value="${recognised_tags[$key]}"
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printf "# %s\t%s.\n" "$key" "$value"
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done
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printf "#\n\n"
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}
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check_tag() {
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local tag="$1"
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local entry="$2"
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[ -z "$tag" ] && die "no tag for entry '$entry'"
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[ -z "$entry" ] && die "no entry for tag '$tag'"
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value="${recognised_tags[$tag]}"
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# each tag MUST have a description
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[ -n "$value" ] && return
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die "invalid tag '$tag' found for entry '$entry'"
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}
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check_tags() {
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local tags="$1"
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local entry="$2"
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[ -z "$tags" ] && die "entry '$entry' doesn't have any tags"
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[ -z "$entry" ] && die "no entry for tags '$tags'"
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tags=$(echo "$tags" | tr ',' '\n')
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for tag in $tags; do
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check_tag "$tag" "$entry"
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done
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}
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# Display an array to stdout.
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#
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# If 2 arguments are specified, split array across multiple lines,
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# one per element with a backslash at the end of all lines except
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# the last.
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#
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# Arguments:
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#
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# $1: *Name* of array variable (no leading '$'!!)
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# $2: (optional) "multi" - show values across multiple lines,
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# "dump" - show full hash values. Any other value results in the
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# options being displayed on a single line.
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show_array() {
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local action="$1"
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local _array=("$@")
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_array=("${_array[@]:1}")
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local -i size="${#_array[*]}"
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local -i i=1
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local entry
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local tags
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local elem
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local suffix
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local one_line="no"
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[ "$action" = "dump" ] && show_tags_header
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for entry in "${_array[@]}"; do
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[ -z "$entry" ] && die "found empty entry"
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tags=$(echo "$entry" | cut -s -d: -f1)
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elem=$(echo "$entry" | cut -s -d: -f2-)
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[ -z "$elem" ] && die "no option for entry '$entry'"
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check_tags "$tags" "$entry"
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if [ "$action" = "dump" ]; then
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printf "%s\t\t%s\n" "$tags" "$elem"
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elif [ "$action" = "multi" ]; then
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if [ $i -eq $size ]; then
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suffix=""
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else
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suffix=' \'
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fi
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printf '%s%s\n' "$elem" "$suffix"
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else
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one_line="yes"
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echo -n "$elem "
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fi
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i+=1
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done
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[ "$one_line" = yes ] && echo
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}
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generate_qemu_options() {
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#---------------------------------------------------------------------
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#check if cross-compile is needed
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host=$(uname -m)
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if [ $arch != $host ];then
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case $arch in
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aarch64) qemu_options+=(size:--cross-prefix=aarch64-linux-gnu-);;
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ppc64le) qemu_options+=(size:--cross-prefix=powerpc64le-linux-gnu-);;
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s390x) exit;;
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x86_64);;
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*) exit;;
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esac
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fi
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# Disabled options
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if [ "${qemu_version_major}" -ge 5 ]; then
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# Disable sheepdog block driver support
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qemu_options+=(size:--disable-sheepdog)
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# Disable block migration in the main migration stream
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qemu_options+=(size:--disable-live-block-migration)
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else
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# Starting from QEMU 5.0, the bluetooth code has been removed without replacement.
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# bluetooth support not required
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qemu_options+=(size:--disable-bluez)
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fi
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# braille support not required
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qemu_options+=(size:--disable-brlapi)
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# Don't build documentation
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qemu_options+=(minimal:--disable-docs)
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# Disable GUI (graphics)
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qemu_options+=(size:--disable-curses)
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qemu_options+=(size:--disable-gtk)
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qemu_options+=(size:--disable-opengl)
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qemu_options+=(size:--disable-sdl)
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qemu_options+=(size:--disable-spice)
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qemu_options+=(size:--disable-vte)
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# Disable graphical network access
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qemu_options+=(size:--disable-vnc)
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qemu_options+=(size:--disable-vnc-jpeg)
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qemu_options+=(size:--disable-vnc-png)
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qemu_options+=(size:--disable-vnc-sasl)
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# Disable PAM authentication: it's a feature used together with VNC access
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# that's not used. See QEMU commit 8953caf for more details
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[ "${qemu_version_major}" -ge 4 ] && qemu_options+=(size:--disable-auth-pam)
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# Disable unused filesystem support
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[ "$arch" == x86_64 ] && qemu_options+=(size:--disable-fdt)
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qemu_options+=(size:--disable-glusterfs)
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qemu_options+=(size:--disable-libiscsi)
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qemu_options+=(size:--disable-libnfs)
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# Starting from QEMU 4.1, libssh replaces to libssh2
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if [ "$(echo "${qemu_version_major}.${qemu_version_minor} >= 4.1" | bc)" == "1" ]; then
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qemu_options+=(size:--disable-libssh)
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else
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qemu_options+=(size:--disable-libssh2)
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fi
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# Disable unused compression support
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qemu_options+=(size:--disable-bzip2)
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qemu_options+=(size:--disable-lzo)
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qemu_options+=(size:--disable-snappy)
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# Disable unused security options
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qemu_options+=(security:--disable-seccomp)
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qemu_options+=(security:--disable-tpm)
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# Disable userspace network access ("-net user")
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qemu_options+=(size:--disable-slirp)
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# Disable USB
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qemu_options+=(size:--disable-libusb)
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qemu_options+=(size:--disable-usb-redir)
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# Disable TCG support
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case "$arch" in
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aarch64)
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echo $hypervisor | grep -q nemu && qemu_options+=(size:--disable-tcg)
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;;
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x86_64) qemu_options+=(size:--disable-tcg) ;;
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ppc64le) ;;
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s390x) qemu_options+=(size:--disable-tcg) ;;
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esac
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# SECURITY: Don't build a static binary (lowers security)
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# needed if qemu version is less than 2.7
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if [ "${qemu_version_major}" -eq 2 ] && [ "${qemu_version_minor}" -lt 7 ]; then
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qemu_options+=(security:--disable-static)
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fi
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if [ "${static}" == "true" ]; then
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qemu_options+=(misc:--static)
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fi
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# Disable debug is always passed to the qemu binary so not required.
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case "$arch" in
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aarch64)
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;;
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x86_64)
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qemu_options+=(size:--disable-debug-tcg)
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qemu_options+=(size:--disable-tcg-interpreter)
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;;
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ppc64le)
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qemu_options+=(size:--disable-debug-tcg)
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qemu_options+=(size:--disable-tcg-interpreter)
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;;
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s390x)
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qemu_options+=(size:--disable-debug-tcg)
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qemu_options+=(size:--disable-tcg-interpreter)
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;;
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esac
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qemu_options+=(size:--disable-qom-cast-debug)
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qemu_options+=(size:--disable-tcmalloc)
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# Disallow network downloads
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qemu_options+=(security:--disable-curl)
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# Disable Remote Direct Memory Access (Live Migration)
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# https://wiki.qemu.org/index.php/Features/RDMALiveMigration
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qemu_options+=(size:--disable-rdma)
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# Don't build the qemu-io, qemu-nbd and qemu-image tools
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qemu_options+=(size:--disable-tools)
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# Don't build linux-user bsd-user
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qemu_options+=(size:--disable-bsd-user)
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qemu_options+=(size:--disable-linux-user)
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# Don't build sparse check tool
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qemu_options+=(size:--disable-sparse)
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# Don't build VDE networking backend
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qemu_options+=(size:--disable-vde)
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# Don't build other options which can't be depent on build server.
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qemu_options+=(size:--disable-xfsctl)
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qemu_options+=(size:--disable-libxml2)
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qemu_options+=(size:--disable-nettle)
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# Disable XEN driver
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qemu_options+=(size:--disable-xen)
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# FIXME: why is this disabled?
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# (for reference, it's explicitly enabled in Ubuntu 17.10 and
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# implicitly enabled in Fedora 27).
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qemu_options+=(size:--disable-linux-aio)
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if [[ "${qemu_version_major}" -ge 3 ]]; then
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# Disable graphics
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qemu_options+=(size:--disable-virglrenderer)
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# Due to qemu commit 3ebb9c4f52, we can't disable replication in v3.0
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if [[ "${qemu_version_major}" -ge 4 || ( "${qemu_version_major}" -eq 3 && "${qemu_version_minor}" -ge 1 ) ]]; then
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# Disable block replication
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qemu_options+=(size:--disable-replication)
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fi
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# Disable USB smart card reader
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qemu_options+=(size:--disable-smartcard)
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# Disable guest agent
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qemu_options+=(size:--disable-guest-agent)
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qemu_options+=(size:--disable-guest-agent-msi)
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# unused image formats
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qemu_options+=(size:--disable-vvfat)
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qemu_options+=(size:--disable-vdi)
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qemu_options+=(size:--disable-qed)
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qemu_options+=(size:--disable-qcow1)
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qemu_options+=(size:--disable-bochs)
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qemu_options+=(size:--disable-cloop)
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qemu_options+=(size:--disable-dmg)
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qemu_options+=(size:--disable-parallels)
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qemu_options+=(size:--disable-vxhs)
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fi
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#---------------------------------------------------------------------
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# Enabled options
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# Enable kernel Virtual Machine support.
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# This is the default, but be explicit to avoid any future surprises
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qemu_options+=(speed:--enable-kvm)
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# Required for fast network access
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qemu_options+=(speed:--enable-vhost-net)
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# Always strip binaries
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# needed if qemu version is less than 2.7
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if [ "${qemu_version_major}" -eq 2 ] && [ "${qemu_version_minor}" -lt 7 ]; then
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qemu_options+=(size:--enable-strip)
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fi
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# Support Ceph RADOS Block Device (RBD)
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[ -z "${static}" ] && qemu_options+=(functionality:--enable-rbd)
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# In "passthrough" security mode
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# (-fsdev "...,security_model=passthrough,..."), qemu uses a helper
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# application called virtfs-proxy-helper(1) to make certain 9p
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# operations safer.
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qemu_options+=(functionality:--enable-virtfs)
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qemu_options+=(functionality:--enable-attr)
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qemu_options+=(functionality:--enable-cap-ng)
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if [[ "${qemu_version_major}" -ge 4 || ( "${qemu_version_major}" -eq 3 && "${qemu_version_minor}" -ge 1 ) ]]; then
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# AVX2 is enabled by default by x86_64, make sure it's enabled only
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# for that architecture
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if [ "$arch" == x86_64 ]; then
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qemu_options+=(speed:--enable-avx2)
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if [ "${qemu_version_major}" -ge 5 ]; then
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qemu_options+=(speed:--enable-avx512f)
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fi
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# According to QEMU's nvdimm documentation: When 'pmem' is 'on' and QEMU is
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# built with libpmem support, QEMU will take necessary operations to guarantee
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# the persistence of its own writes to the vNVDIMM backend.
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qemu_options+=(functionality:--enable-libpmem)
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else
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qemu_options+=(speed:--disable-avx2)
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qemu_options+=(functionality:--disable-libpmem)
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fi
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# Enable libc malloc_trim() for memory optimization.
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qemu_options+=(speed:--enable-malloc-trim)
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fi
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#---------------------------------------------------------------------
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# Other options
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# 64-bit only
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if [ "${arch}" = "ppc64le" ]; then
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qemu_options+=(arch:"--target-list=ppc64-softmmu")
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else
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qemu_options+=(arch:"--target-list=${arch}-softmmu")
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fi
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# aarch64 need to explictly set --enable-pie
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if [ "${arch}" = "aarch64" ]; then
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qemu_options+=(arch:"--enable-pie")
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fi
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_qemu_cflags=""
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# compile with high level of optimisation
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_qemu_cflags+=" -O3"
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# Improve code quality by assuming identical semantics for interposed
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# synmbols.
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# Only enable if gcc is 5.3 or newer
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if [ "${gcc_version_major}" -ge 5 ] && [ "${gcc_version_minor}" -ge 3 ]; then
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_qemu_cflags+=" -fno-semantic-interposition"
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fi
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# Performance optimisation
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_qemu_cflags+=" -falign-functions=32"
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# SECURITY: make the compiler check for common security issues
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# (such as argument and buffer overflows checks).
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_qemu_cflags+=" -D_FORTIFY_SOURCE=2"
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# SECURITY: Create binary as a Position Independant Executable,
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# and take advantage of ASLR, making ROP attacks much harder to perform.
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# (https://wiki.debian.org/Hardening)
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case "$arch" in
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aarch64) _qemu_cflags+=" -fPIE" ;;
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x86_64) _qemu_cflags+=" -fPIE" ;;
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ppc64le) _qemu_cflags+=" -fPIE" ;;
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s390x) _qemu_cflags+=" -fPIE" ;;
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esac
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# Set compile options
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qemu_options+=(functionality,security,speed,size:"--extra-cflags=\"${_qemu_cflags}\"")
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unset _qemu_cflags
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_qemu_ldflags=""
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# SECURITY: Link binary as a Position Independant Executable,
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# and take advantage of ASLR, making ROP attacks much harder to perform.
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# (https://wiki.debian.org/Hardening)
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case "$arch" in
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aarch64) [ -z "${static}" ] && _qemu_ldflags+=" -pie" ;;
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x86_64) [ -z "${static}" ] && _qemu_ldflags+=" -pie" ;;
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ppc64le) [ -z "${static}" ] && _qemu_ldflags+=" -pie" ;;
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s390x) [ -z "${static}" ] && _qemu_ldflags+=" -pie" ;;
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esac
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# SECURITY: Disallow executing code on the stack.
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_qemu_ldflags+=" -z noexecstack"
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# SECURITY: Make the linker set some program sections to read-only
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# before the program is run to stop certain attacks.
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_qemu_ldflags+=" -z relro"
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# SECURITY: Make the linker resolve all symbols immediately on program
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# load.
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_qemu_ldflags+=" -z now"
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qemu_options+=(security:"--extra-ldflags=\"${_qemu_ldflags}\"")
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unset _qemu_ldflags
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# Where to install qemu helper binaries
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qemu_options+=(misc:--prefix=${prefix})
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# Where to install qemu libraries
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qemu_options+=(arch:--libdir=${prefix}/lib/${hypervisor})
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# Where to install qemu helper binaries
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qemu_options+=(misc:--libexecdir=${prefix}/libexec/${hypervisor})
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# Where to install data files
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qemu_options+=(misc:--datadir=${prefix}/share/${hypervisor})
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}
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# Entry point
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main() {
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action=""
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while getopts "dhms" opt; do
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case "$opt" in
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|
d)
|
|
action="dump"
|
|
;;
|
|
|
|
h)
|
|
usage
|
|
exit 0
|
|
;;
|
|
|
|
m)
|
|
action="multi"
|
|
;;
|
|
s)
|
|
static="true"
|
|
;;
|
|
esac
|
|
done
|
|
|
|
shift $((OPTIND - 1))
|
|
|
|
[ -z "$1" ] && die "need hypervisor name"
|
|
hypervisor="$1"
|
|
|
|
local qemu_version_file="VERSION"
|
|
[ -f ${qemu_version_file} ] || die "QEMU version file '$qemu_version_file' not found"
|
|
|
|
local qemu_version_major=$(cut -d. -f1 "${qemu_version_file}")
|
|
local qemu_version_minor=$(cut -d. -f2 "${qemu_version_file}")
|
|
|
|
[ -n "${qemu_version_major}" ] ||
|
|
die "cannot determine qemu major version from file $qemu_version_file"
|
|
[ -n "${qemu_version_minor}" ] ||
|
|
die "cannot determine qemu minor version from file $qemu_version_file"
|
|
|
|
local gcc_version_major=$(gcc -dumpversion | cut -f1 -d.)
|
|
local gcc_version_minor=$(gcc -dumpversion | cut -f2 -d.)
|
|
|
|
[ -n "${gcc_version_major}" ] ||
|
|
die "cannot determine gcc major version, please ensure it is installed"
|
|
[ -n "${gcc_version_minor}" ] ||
|
|
die "cannot determine gcc minor version, please ensure it is installed"
|
|
|
|
# Generate qemu options
|
|
generate_qemu_options
|
|
|
|
show_array "$action" "${qemu_options[@]}"
|
|
|
|
exit 0
|
|
}
|
|
|
|
main $@
|