glfs/postlfs/virtualization/qemu.xml
2022-12-30 15:33:07 +01:00

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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../../general.ent">
%general-entities;
<!ENTITY qemu-download-http "https://download.qemu-project.org/qemu-&qemu-version;.tar.xz">
<!ENTITY qemu-download-ftp " ">
<!ENTITY qemu-md5sum "7630d6a9eba7ab2bcb9979d6d24c2697">
<!ENTITY qemu-size "117 MB">
<!ENTITY qemu-buildsize "2.1 GB">
<!ENTITY qemu-time "1.3 SBU (add 2.0 SBU for tests, both using parallelism=4)">
]>
<sect1 id="qemu" xreflabel="qemu-&qemu-version;">
<?dbhtml filename="qemu.html"?>
<title>qemu-&qemu-version;</title>
<indexterm zone="qemu">
<primary sortas="a-qemu">qemu</primary>
</indexterm>
<sect2 role="package">
<title>Introduction to qemu</title>
<para>
<application>qemu</application> is a full virtualization solution for
Linux on x86 hardware containing virtualization extensions (Intel VT or
AMD-V).
</para>
&lfs112_checked;
<bridgehead renderas="sect3">Package Information</bridgehead>
<itemizedlist spacing="compact">
<listitem>
<para>
Download (HTTP): <ulink url="&qemu-download-http;"/>
</para>
</listitem>
<listitem>
<para>
Download (FTP): <ulink url="&qemu-download-ftp;"/>
</para>
</listitem>
<listitem>
<para>
Download MD5 sum: &qemu-md5sum;
</para>
</listitem>
<listitem>
<para>
Download size: &qemu-size;
</para>
</listitem>
<listitem>
<para>
Estimated disk space required: &qemu-buildsize;
</para>
</listitem>
<listitem>
<para>
Estimated build time: &qemu-time;
</para>
</listitem>
</itemizedlist>
<bridgehead renderas="sect3">Qemu Dependencies</bridgehead>
<bridgehead renderas="sect4">Required</bridgehead>
<para role="required">
<xref linkend="glib2"/>, and
<xref linkend="x-window-system"/>
</para>
<bridgehead renderas="sect4">Recommended</bridgehead>
<para role="recommended">
<xref linkend="alsa-lib"/>,
<xref linkend="libslirp"/>, and
<xref linkend="sdl2"/>
</para>
<bridgehead renderas="sect4">Optional</bridgehead>
<para role="optional">
Depending on the sound system, various packages in <xref linkend="alsa"/>,
<xref linkend="python3"/>,
<xref linkend="pulseaudio"/>,
<xref linkend="bluez"/>,
<xref linkend="curl"/>,
<xref linkend="cyrus-sasl"/>,
<xref linkend="gnutls"/>,
<xref linkend="gtk2"/>,
<xref linkend="gtk3"/>,
<xref linkend="libusb"/>,
<xref linkend="libgcrypt"/>,
<xref linkend="libssh2"/>,
<xref linkend="lzo"/>,
<xref linkend="nettle"/>,
<xref linkend="mesa"/>,
<xref linkend="sdl"/>,
<xref role="nodep" linkend="vte"/> or <xref linkend="vte2"/>, and
<!-- libcacard has been a standalone project since qemu-2.5.-->
<ulink url="https://gitlab.freedesktop.org/spice/libcacard">libcacard</ulink>
</para>
<bridgehead renderas="sect4">Optional dependencies for installing the documentation</bridgehead>
<para role="optional">
<ulink url="https://www.sphinx-doc.org/en/master/index.html">sphinx</ulink> with the
<ulink url="https://pypi.org/project/sphinx-rtd-theme/">sphinx-rtd-theme</ulink> theme
</para>
<note>
<para>
This optional dependencies list is not comprehensive. See the output of
<command>./configure --help</command> for a more complete list.
</para>
</note>
<para condition="html" role="usernotes">User Notes:
<ulink url="&blfs-wiki;/qemu"/></para>
</sect2>
<sect2 id='qemu-prereq'>
<title>KVM Prerequisites</title>
<para>
Before building <application>qemu</application>, check to see if
your processor supports Virtualization Technology (VT):
</para>
<screen><userinput>grep -E '^flags.*(vmx|svm)' /proc/cpuinfo</userinput></screen>
<para>
If you get any output, you have VT technology (vmx for Intel
processors and svm for AMD processors). You then need to go into your
system BIOS and ensure it is enabled. After enabling, reboot back to your
LFS instance.
</para>
</sect2>
<sect2 role="kernel" id='qemu-kernel'>
<title>Kernel Configuration</title>
<para>
Enable the following options in the kernel configuration and
recompile the kernel if necessary:
</para>
<screen><literal>[*] Virtualization: ---&gt; [CONFIG_VIRTUALIZATION]
&lt;*/M&gt; Kernel-based Virtual Machine (KVM) support [CONFIG_KVM]
&lt;*/M&gt; KVM for Intel (and compatible) processors support [CONFIG_KVM_INTEL]
&lt;*/M&gt; KVM for AMD processors support [CONFIG_KVM_AMD]</literal></screen>
<indexterm zone="qemu qemu-kernel">
<primary sortas="d-qemu">qemu</primary>
</indexterm>
<para>
The Intel or AMD settings are not both required, but the one matching
your system processor is required.
</para>
<para>
To use the <quote>bridge</quote> network device, as explained below,
check that <xref linkend='bridgeutils'/> is installed
and the following options in the kernel configuration are enabled:
</para>
<screen><literal>[*] Networking support ---&gt; [CONFIG_NET]
Networking options ---&gt;
&lt;*/M&gt; 802.1d Ethernet Bridging [CONFIG_BRIDGE]
Device Drivers ---&gt;
[*] Network device support ---&gt; [CONFIG_NETDEVICES]
&lt;*/M&gt; Universal TUN/TAP device driver support [CONFIG_TUN]</literal></screen>
</sect2>
<sect2 role="installation">
<title>Installation of qemu</title>
<!-- group kvm is created in lfs chapter 7 even for sysv
<para revision="sysv">
You will need a dedicated group that will contain users (other than root)
allowed to access the KVM device. Create this group by running the
following command as the
<systemitem class="username">root</systemitem> user:
</para>
<screen role="root" revision="sysv"><userinput>groupadd -g 61 kvm</userinput></screen>
-->
<para>
As the &root; user, add any users that might use the KVM device to that
group:
</para>
<screen role="root"><userinput>usermod -a -G kvm <replaceable>&lt;username&gt;</replaceable></userinput></screen>
<para>
Install <application>qemu</application> by running the following
commands:
</para>
<note>
<para>
Qemu is capable of running many targets. The build process
is also capable of building multiple targets at one time in a
comma delimited list assigned to <option>--target-list</option>. Run
<command>./configure --help</command> to get a complete list of
available targets.
</para>
</note>
<screen><userinput>if [ $(uname -m) = i686 ]; then
QEMU_ARCH=i386-softmmu
else
QEMU_ARCH=x86_64-softmmu
fi
mkdir -vp build &amp;&amp;
cd build &amp;&amp;
../configure --prefix=/usr \
--sysconfdir=/etc \
--localstatedir=/var \
--target-list=$QEMU_ARCH \
--audio-drv-list=alsa \
--disable-pa \
--docdir=/usr/share/doc/qemu-&qemu-version; &amp;&amp;
unset QEMU_ARCH &amp;&amp;
make</userinput></screen>
<para>
<application>qemu</application> uses <command>ninja</command> as
a subprocess when building. To run the tests, issue:
<command>ninja test</command>.
</para>
<para>
Now, as the <systemitem class="username">root</systemitem> user:
</para>
<screen role="root"><userinput>make install</userinput></screen>
<para>
You will also need to add an Udev rule so that the KVM device gets correct
permissions. As the &root; user, issue:
</para>
<screen role="root"><userinput>cat > /lib/udev/rules.d/65-kvm.rules &lt;&lt; "EOF"
<literal>KERNEL=="kvm", GROUP="kvm", MODE="0660"</literal>
EOF</userinput></screen>
<para>
Change the permissions and ownership of a helper script, which is needed
when using the <quote>bridge</quote> network device (see below). Again
as the &root; user, issue:
</para>
<screen role="root"><userinput>chgrp kvm /usr/libexec/qemu-bridge-helper &amp;&amp;
chmod 4750 /usr/libexec/qemu-bridge-helper</userinput></screen>
<note>
<para>
For convenience you may want to create a symbolic link to run
the installed program. For instance (as the &root; user):
</para>
<screen role="root"><userinput>ln -sv qemu-system-`uname -m` /usr/bin/qemu</userinput></screen>
</note>
</sect2>
<sect2 role="commands">
<title>Command Explanations</title>
<para>
<parameter>--audio-drv-list=alsa --disable-pa</parameter>: This switch
sets the audio driver to ALSA. See below for enabling other audio drivers.
</para>
<para>
<option>--audio-drv-list=pa --disable-alsa</option>: This switch sets
the audio driver to pulseaudio. For other drivers see the
--audio-drv-list choices in the output of
<command>./configure --help</command>. The default audio driver is OSS.
To enable support for both alsa and pulseaudio, use
<option>--audio-drv-list=alsa,pa</option>.
</para>
</sect2>
<sect2 role="using">
<title>Using Qemu</title>
<para>
Since using qemu means using a virtual computer, the steps to set up
the virtual machine are in close analogy with those to set up a real
computer. You'll need to decide about CPU, memory, disk, USB devices,
network card(s), screen size, etc. Once the <quote>hardware</quote> is
decided, you'll have for example to choose how to connect the machine
to internet, and/or to install an OS. In the following, we show basic
ways of performing those steps. But qemu is much more than this, and it
is strongly advised to read the qemu documentation in
<filename>/usr/share/doc/qemu-&qemu-version;/qemu-doc.html</filename>.
</para>
<note>
<para>
It is standard practice to name the computer running qemu
<quote>host</quote> and the emulated machine running under qemu the
<quote>guest</quote>. We'll use those notations in the following.
</para>
</note>
<note>
<para>
The following instructions assume the optional symbolic link,
<filename>qemu</filename>, has been created. Additionally,
<command>qemu</command> should be run in a graphical environment.
But it is possible to use qemu <quote>headless</quote> or through
SSH. See the documentation for the various possibilities.
</para>
</note>
<bridgehead renderas="sect3">Disk</bridgehead>
<para>
A virtual disk may be set up in the following way:
</para>
<screen><userinput>VDISK_SIZE=<replaceable>50G</replaceable>
VDISK_FILENAME=<replaceable>vdisk.img</replaceable>
qemu-img create -f qcow2 $VDISK_FILENAME $VDISK_SIZE</userinput></screen>
<para>
The virtual disk size and filename should be adjusted as desired. The
actual size of the file will be less than specified, but will expand as
needed, so it is safe to put a high value.
</para>
<bridgehead renderas="sect3">Operating System</bridgehead>
<para>
To install an operating system, download an iso image from your preferred
Linux distribution. For the purposes of this example, we'll use
<filename>Fedora-16-x86_64-Live-LXDE.iso</filename> in the current
directory. Run the following:
</para>
<screen><userinput>qemu -enable-kvm \
-drive file=$VDISK_FILENAME \
-cdrom Fedora-16-x86_64-Live-LXDE.iso \
-boot d \
-m <replaceable>1G</replaceable></userinput></screen>
<para>
Follow the normal installation procedures for the chosen distribution.
The <parameter>-boot</parameter> option specifies the boot order of
drives as a string of drive letters. Valid drive letters are: a, b
(floppy 1 and 2), c (first hard disk), d (first CD-ROM). The
<parameter>-m</parameter> option is the amount of memory to use for the
virtual machine. The choice depends on the load of the host. Modern
distributions should be comfortable with 1GB.
The <parameter>-enable-kvm</parameter> option allows hardware
acceleration. Without this switch, the emulation is much slower.
</para>
<bridgehead renderas="sect3">Defining the virtual hardware</bridgehead>
<para>
The virtual machine hardware is defined by the qemu command line.
An example command is given below:
</para>
<screen><userinput>qemu -enable-kvm \
-smp 4 \
-cpu host \
-m 1G \
-drive file=$VDISK_FILENAME \
-cdrom grub-img.iso \
-boot order=c,once=d,menu=on \
-net nic,netdev=net0 \
-netdev user,id=net0 \
-device ac97 \
-vga std \
-serial mon:stdio \
-name "fedora-16"</userinput></screen>
<bridgehead renderas="sect3">Meaning of the command line options</bridgehead>
<para>
<parameter>-enable-kvm</parameter>: enable full KVM virtualization
support. On some hardware, it may be necessary to add the undocumented
<option>-machine smm=off</option> option in order to enable KVM.
</para>
<para>
<parameter>-smp &lt;N&gt;</parameter>: enable symmetric multiprocessing
with &lt;N&gt; CPUs.
</para>
<para>
<parameter>-cpu &lt;model&gt;</parameter>: simulate CPU &lt;model&gt;.
the list of supported models can be obtained with <option>-cpu
help</option>.
</para>
<para>
<parameter>-drive file=&lt;filename&gt;</parameter>: defines a virtual
disk whose image is stored in <filename>&lt;filename&gt;</filename>.
</para>
<para>
<parameter>-cdrom grub-img.iso</parameter>: defines an iso formatted file
to use as a cdrom. Here we use a grub rescue disk, which may turn handy
when something goes wrong at boot time.
</para>
<para>
<parameter>-boot order=c,once=d,menu=on</parameter>: defines the boot
order for the virtual BIOS.
</para>
<para>
<parameter>-net nic,netdev=&lt;netid&gt;</parameter>: defines a network
card connected to the network device with id &lt;netid&gt;.
</para>
<para>
<parameter>-netdev user,id=&lt;netid&gt;</parameter>: defines the
network <quote>user</quote> device. This is a virtual local network
with addresses 10.0.2.0/24, where the host has address 10.0.2.2 and
acts as a gateway to internet, and with a name server at address
10.0.2.3, and an smb server at address 10.0.2.4. A builtin DHCP server
can allocate addresses between 10.0.2.15 and 10.0.2.31.
</para>
<para>
<parameter>-soundhw &lt;model&gt;</parameter>: defines the soundcard
model. The list may be obtained with <option>-soundhw help</option>.
</para>
<para>
<parameter>-vga &lt;type&gt;</parameter>: defines the type of vga card
to emulate.
</para>
<para>
<parameter>-serial mon:stdio</parameter>: sends the serial port of the
guest (<filename>/dev/ttyS0</filename> on linux guests), multiplexed with
the qemu monitor, to the standard input and output of the qemu
process.
</para>
<para>
<parameter>-name &lt;name&gt;</parameter>: sets the name of the guest.
This name is displayed in the guest window caption. It may be useful
if you run several guests at the same time.
</para>
<para>
<option>-pflash /usr/share/qemu/edk2-x86_64-code.fd</option>: Load a
pre-built EDK2 UEFI firmware, instead of the default PC BIOS. Use
this option if you want to boot the guest OS with UEFI.
</para>
<para>
<option>-drive file=&lt;filename&gt;,if=virtio</option>: Provide
Virtio interface to the guest kernel for accessing the disk image,
instead of simulating a real disk hardware. This can improve disk I/O
performance, but it requires a Virtio driver in guest kernel. Use
it instead of a plain <option>-drive</option> if the guest kernel
supports Virtio. Note that if the guest kernel is Linux, the virtual
disks using Virtio interface will be named <filename>vdx</filename>
in the devtmpfs, instead of <filename>sdx</filename>.
</para>
<para>
<option>-net nic,netdev=net0,model=virtio-net-pci</option>: Provide
Virtio interface to the guest kernel for accessing the network
interface, instead of simulating a real network interface card. This
can improve network I/O performance, but it requires a Virtio driver
in guest kernel. Use it instead of a plain <option>-net</option> if
the guest kernel supports Virtio.
</para>
<bridgehead renderas="sect3">Controlling the Emulated Display</bridgehead>
<para>
It may happen that the guest window displayed by qemu does not correspond
to the full capability of the emulated vga card. For example, the vmware
card is 1600x900 capable, but only 1024x768 is displayed by default.
A suitable Xorg configuration on the guest allows to use the full size
(Note that the Xorg video driver to use is <xref
linkend="xorg-vmware-driver"/>):
</para>
<screen role="root"><userinput>cat &gt; /usr/share/X11/xorg.conf.d/20-vmware.conf &lt;&lt; "EOF"
<literal>Section "Monitor"
Identifier "Monitor0"
# cvt 1600 900
# 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
Option "PreferredMode" "1600x900"
HorizSync 1-200
VertRefresh 1-200
EndSection
Section "Device"
Identifier "VMware SVGA II Adapter"
Option "Monitor" "default"
Driver "vmware"
EndSection
Section "Screen"
Identifier "Default Screen"
Device "VMware SVGA II Adapter"
Monitor "Monitor0"
SubSection "Display"
Depth 24
Modes "1600x900" "1440x900" "1366x768" "1280x720" "800x480"
EndSubSection
EndSection</literal>
EOF</userinput></screen>
<para>
New sizes will be available besides the native ones. You need to
restart X in order to have the new sizes available.
</para>
<bridgehead renderas="sect3">Networking</bridgehead>
<para>
The above solution for networking allows the guest to access the local
network through the host (and possibly to access internet through the
local routers), but the converse is not true. Not even the host can
access the guest, unless port forwarding is enabled. And in the case
several guests are running, they cannot communicate with each other.
Other network devices can be used for this purpose. For example, there
is the <quote>socket</quote> device, which allows several guests to
share a common virtual network. In the following, we describe in more
details how to set up the <quote>bridge</quote> device, which allows
the guests to appear as if connected to the local network. All the
commands below should be run as the <systemitem
class="username">root</systemitem> user.
</para>
<para revision="sysv">
Set up bridging with <xref linkend="bridgeutils"/>. Only the physical
interface(s) should be set up at boot. The virtual interface(s) will be
added as needed when qemu is started.
</para>
<para revision="systemd">
<!-- On SYS-V, IP_FORWARD is enabled by the bridge script. -->
Allow the host to forward IP packets:
</para>
<screen role="root"
revision="systemd"><userinput>sysctl -w net.ipv4.ip_forward=1</userinput></screen>
<para revision="systemd">
To make this permanent, add the command to
<filename>/etc/sysctl.d/60-net-forward.conf:</filename>
</para>
<screen role="root"
revision="systemd"><userinput>cat &gt;&gt; /etc/sysctl.d/60-net-forward.conf &lt;&lt; EOF
<literal>net.ipv4.ip_forward=1</literal>
EOF</userinput></screen>
<para>
Set up a required configuration file:
</para>
<!-- /etc/qemu has not been installed by "make install" since version 2.4 -->
<screen role="root"><userinput>install -vdm 755 /etc/qemu &amp;&amp;
echo allow br0 &gt; /etc/qemu/bridge.conf</userinput></screen>
<para>
In the qemu command line above, replace the switch
<parameter>-netdev user,...</parameter> with
<parameter>-netdev bridge,...</parameter>.
</para>
</sect2>
<sect2 role="content">
<title>Contents</title>
<segmentedlist>
<segtitle>Installed Programs</segtitle>
<segtitle>Installed Library</segtitle>
<segtitle>Installed Directories</segtitle>
<seglistitem>
<seg>
elf2dmp,
qemu (symlink),
qemu-edid,
qemu-ga,
qemu-img,
qemu-io,
qemu-keymap,
qemu-nbd,
qemu-pr-helper,
qemu-storage-daemon, and
qemu-system-&lt;arch&gt;
</seg>
<seg>None</seg>
<seg>
/usr/share/qemu and
/usr/share/doc/qemu-&qemu-version; (optional)
</seg>
</seglistitem>
</segmentedlist>
<variablelist>
<bridgehead renderas="sect3">Short Description</bridgehead>
<?dbfo list-presentation="list"?>
<?dbhtml list-presentation="table"?>
<varlistentry id="elf2dmp">
<term><command>elf2dmp</command></term>
<listitem>
<para>
Converts files from elf to dmp format
</para>
<indexterm zone="qemu elf2dmp">
<primary sortas="b-elf2dmp">elf2dmp</primary>
</indexterm>
</listitem>
</varlistentry>
<!--
<varlistentry id="ivshmem-client">
<term><command>ivshmem-client</command></term>
<listitem>
<para>
is a standalone client for using the ivshmem device
</para>
<indexterm zone="qemu ivshmem-client">
<primary sortas="b-ivshmem-client">ivshmem-client</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="ivshmem-server">
<term><command>ivshmem-server</command></term>
<listitem>
<para>
is an example server for the ivshmem device
</para>
<indexterm zone="qemu ivshmem-server">
<primary sortas="b-ivshmem-server">ivshmem-server</primary>
</indexterm>
</listitem>
</varlistentry>
-->
<varlistentry id="qemu-edid">
<term><command>qemu-edid</command></term>
<listitem>
<para>
is a test tool for the qemu EDID generator
</para>
<indexterm zone="qemu qemu-edid">
<primary sortas="b-qemu-edid">qemu-edid</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-ga">
<term><command>qemu-ga</command></term>
<listitem>
<para>
implements support for QMP (QEMU Monitor Protocol) commands and
events that terminate and originate respectively within the guest
using an agent built as part of QEMU
</para>
<indexterm zone="qemu qemu-ga">
<primary sortas="b-qemu-ga">qemu-ga</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-img">
<term><command>qemu-img</command></term>
<listitem>
<para>
provides commands to manage QEMU disk images
</para>
<indexterm zone="qemu qemu-img">
<primary sortas="b-qemu-img">qemu-img</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-io">
<term><command>qemu-io</command></term>
<listitem>
<para>
is a diagnostic and manipulation program for (virtual) memory
media. It is still at an early stage of development
</para>
<indexterm zone="qemu qemu-io">
<primary sortas="b-qemu-io">qemu-io</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-keymap">
<term><command>qemu-keymap</command></term>
<listitem>
<para>
generates qemu reverse keymaps from xkb keymaps,
which can be used with the qemu "-k" command line switch
</para>
<indexterm zone="qemu qemu-keymap">
<primary sortas="b-qemu-keymap">qemu-keymap</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-nbd">
<term><command>qemu-nbd</command></term>
<listitem>
<para>
exports Qemu disk images using the QEMU Disk Network Block
Device (NBD) protocol
</para>
<indexterm zone="qemu qemu-nbd">
<primary sortas="b-qemu-nbd">qemu-nbd</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-pr-helper">
<term><command>qemu-pr-helper</command></term>
<listitem>
<para>
Implements the persistent reservation helper for QEMU
</para>
<indexterm zone="qemu qemu-pr-helper">
<primary sortas="b-qemu-pr-helper">qemu-pr-helper</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-storage-daemon">
<term><command>qemu-storage-daemon</command></term>
<listitem>
<para>
allows to modify disk images using the QEMU Monitor Protocol (QMP)
without running a VM
</para>
<indexterm zone="qemu qemu-storage-daemon">
<primary sortas="b-qemu-storage-daemon">qemu-storage-daemon</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="qemu-system">
<term><command>qemu-system-x86_64</command></term>
<listitem>
<para>
is the QEMU PC System emulator
</para>
<indexterm zone="qemu qemu-system">
<primary sortas="b-qemu-system">qemu-system-x86_64</primary>
</indexterm>
</listitem>
</varlistentry>
<!--
<varlistentry id="virtfs-proxy-helper">
<term><command>virtfs-proxy-helper</command></term>
<listitem>
<para>
creates a socket pair or a named socket. QEMU and the proxy helper
communicate using this socket. The QEMU proxy fs driver sends
filesystem requests to the proxy helper and receives the response
from it
</para>
<indexterm zone="qemu virtfs-proxy-helper">
<primary sortas="b-virtfs-proxy-helper">virtfs-proxy-helper</primary>
</indexterm>
</listitem>
</varlistentry>
-->
</variablelist>
</sect2>
</sect1>