| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY qemu-download-http "https://download.qemu.org/qemu-&qemu-version;.tar.xz">
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| 8 | <!ENTITY qemu-download-ftp " ">
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| 9 | <!ENTITY qemu-md5sum "d41853bffb18878dd1ff7afc2eb41f1a">
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| 10 | <!ENTITY qemu-size "121 MB">
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| 11 | <!ENTITY qemu-buildsize "2.5 GB (365 MB installed)">
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| 12 | <!ENTITY qemu-time "1.6 SBU (add 2.4 SBU for tests, both using parallelism=4)">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="qemu" xreflabel="qemu-&qemu-version;">
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| 16 | <?dbhtml filename="qemu.html"?>
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| 17 |
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| 18 |
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| 19 | <title>qemu-&qemu-version;</title>
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| 20 |
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| 21 | <indexterm zone="qemu">
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| 22 | <primary sortas="a-qemu">qemu</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to qemu</title>
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| 27 |
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| 28 | <para>
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| 29 | <application>qemu</application> is a full virtualization solution for
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| 30 | Linux on x86 hardware containing virtualization extensions (Intel VT or
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| 31 | AMD-V).
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| 32 | </para>
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| 33 |
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| 34 | &lfs113_checked;
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| 35 |
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| 36 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 37 | <itemizedlist spacing="compact">
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| 38 | <listitem>
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| 39 | <para>
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| 40 | Download (HTTP): <ulink url="&qemu-download-http;"/>
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| 41 | </para>
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| 42 | </listitem>
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| 43 | <listitem>
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| 44 | <para>
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| 45 | Download (FTP): <ulink url="&qemu-download-ftp;"/>
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| 46 | </para>
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| 47 | </listitem>
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| 48 | <listitem>
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| 49 | <para>
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| 50 | Download MD5 sum: &qemu-md5sum;
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| 51 | </para>
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| 52 | </listitem>
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| 53 | <listitem>
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| 54 | <para>
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| 55 | Download size: &qemu-size;
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| 56 | </para>
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| 57 | </listitem>
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| 58 | <listitem>
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| 59 | <para>
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| 60 | Estimated disk space required: &qemu-buildsize;
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| 61 | </para>
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| 62 | </listitem>
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| 63 | <listitem>
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| 64 | <para>
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| 65 | Estimated build time: &qemu-time;
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| 66 | </para>
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| 67 | </listitem>
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| 68 | </itemizedlist>
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| 69 |
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| 70 | <bridgehead renderas="sect3">Qemu Dependencies</bridgehead>
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| 71 |
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| 72 | <bridgehead renderas="sect4">Required</bridgehead>
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| 73 | <para role="required">
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| 74 | <xref linkend="glib2"/>, and
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| 75 | <xref linkend="x-window-system"/>
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| 76 | </para>
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| 77 |
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| 78 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 79 | <para role="recommended">
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| 80 | <xref linkend="alsa-lib"/>,
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| 81 | <xref linkend="libslirp"/>, and
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| 82 | <xref linkend="sdl2"/>
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| 83 | </para>
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| 84 |
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| 85 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 86 | <para role="optional">
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| 87 | Depending on the sound system, various packages in <xref linkend="alsa"/>,
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| 88 | <xref linkend="python3"/>,
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| 89 | <xref linkend="pulseaudio"/>,
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| 90 | <xref linkend="bluez"/>,
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| 91 | <xref linkend="curl"/>,
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| 92 | <xref linkend="cyrus-sasl"/>,
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| 93 | <xref linkend="gnutls"/>,
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| 94 | <xref linkend="gtk2"/>,
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| 95 | <xref linkend="gtk3"/>,
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| 96 | <xref linkend="libusb"/>,
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| 97 | <xref linkend="libgcrypt"/>,
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| 98 | <xref linkend="libssh2"/>,
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| 99 | <xref linkend="lzo"/>,
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| 100 | <xref linkend="nettle"/>,
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| 101 | <xref linkend="mesa"/>,
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| 102 | <xref role="nodep" linkend="vte"/> or <xref linkend="vte2"/>, and
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| 103 | <!-- libcacard has been a standalone project since qemu-2.5.-->
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| 104 | <ulink url="https://gitlab.freedesktop.org/spice/libcacard">libcacard</ulink>
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| 105 | </para>
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| 106 |
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| 107 | <bridgehead renderas="sect4">Optional (Runtime)</bridgehead>
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| 108 | <para role="runtime">
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| 109 | &logind;
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| 110 | </para>
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| 111 |
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| 112 | <bridgehead renderas="sect4">Optional (for building the documentation)</bridgehead>
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| 113 | <para role="optional">
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| 114 | <xref linkend="sphinx_rtd_theme"/>
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| 115 | </para>
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| 116 |
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| 117 | <note>
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| 118 | <para>
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| 119 | This optional dependencies list is not comprehensive. See the output of
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| 120 | <command>./configure --help</command> for a more complete list.
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| 121 | </para>
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| 122 | </note>
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| 123 |
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| 124 | <para condition="html" role="usernotes">Editor Notes:
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| 125 | <ulink url="&blfs-wiki;/qemu"/></para>
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| 126 |
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| 127 | </sect2>
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| 128 |
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| 129 | <sect2 id='qemu-prereq'>
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| 130 | <title>KVM Prerequisites</title>
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| 131 |
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| 132 | <para>
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| 133 | Before building <application>qemu</application>, check to see if
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| 134 | your processor supports Virtualization Technology (VT):
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| 135 | </para>
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| 136 |
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| 137 | <screen><userinput>grep -E '^flags.*(vmx|svm)' /proc/cpuinfo</userinput></screen>
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| 138 |
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| 139 | <para>
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| 140 | If you get any output, you have VT technology (vmx for Intel
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| 141 | processors and svm for AMD processors). You then need to go into your
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| 142 | system BIOS and ensure it is enabled. After enabling, reboot back to your
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| 143 | LFS instance.
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| 144 | </para>
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| 145 |
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| 146 | </sect2>
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| 147 |
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| 148 | <sect2 role="kernel" id='qemu-kernel'>
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| 149 | <title>Kernel Configuration</title>
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| 150 |
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| 151 | <para>
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| 152 | Enable the following options in the kernel configuration and
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| 153 | recompile the kernel if necessary:
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| 154 | </para>
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| 155 |
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| 156 | <screen><literal>[*] Virtualization: ---> [CONFIG_VIRTUALIZATION]
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| 157 | <*/M> Kernel-based Virtual Machine (KVM) support [CONFIG_KVM]
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| 158 | <*/M> KVM for Intel (and compatible) processors support [CONFIG_KVM_INTEL]
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| 159 | <*/M> KVM for AMD processors support [CONFIG_KVM_AMD]</literal></screen>
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| 160 |
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| 161 | <indexterm zone="qemu qemu-kernel">
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| 162 | <primary sortas="d-qemu">qemu</primary>
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| 163 | </indexterm>
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| 164 |
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| 165 | <para>
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| 166 | The Intel or AMD settings are not both required, but the one matching
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| 167 | your system processor is required.
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| 168 | </para>
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| 169 |
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| 170 | <para>
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| 171 | To use the <quote>bridge</quote> network device, as explained below,
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| 172 | check that <xref linkend='bridgeutils'/> is installed
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| 173 | and the following options in the kernel configuration are enabled:
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| 174 | </para>
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| 175 |
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| 176 | <screen><literal>[*] Networking support ---> [CONFIG_NET]
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| 177 | Networking options --->
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| 178 | <*/M> 802.1d Ethernet Bridging [CONFIG_BRIDGE]
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| 179 | Device Drivers --->
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| 180 | [*] Network device support ---> [CONFIG_NETDEVICES]
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| 181 | <*/M> Universal TUN/TAP device driver support [CONFIG_TUN]</literal></screen>
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| 182 |
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| 183 | </sect2>
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| 184 |
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| 185 | <sect2 role="installation">
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| 186 | <title>Installation of qemu</title>
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| 187 | <!-- group kvm is created in lfs chapter 7 even for sysv
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| 188 | <para revision="sysv">
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| 189 | You will need a dedicated group that will contain users (other than root)
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| 190 | allowed to access the KVM device. Create this group by running the
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| 191 | following command as the
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| 192 | <systemitem class="username">root</systemitem> user:
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| 193 | </para>
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| 194 |
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| 195 | <screen role="root" revision="sysv"><userinput>groupadd -g 61 kvm</userinput></screen>
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| 196 | -->
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| 197 | <para>
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| 198 | The udev rule of LFS only allows the &root; user, the users owning
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| 199 | a local login session supported by the optional runtime dependency
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| 200 | &logind;, or the users in the
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| 201 | <systemitem class="groupname">kvm</systemitem> group to use the KVM
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| 202 | device. As the &root; user, add any non-&root; users that might use
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| 203 | the KVM device either without &logind; installed or remotely (via a
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| 204 | SSH connection) to the
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| 205 | <systemitem class="groupname">kvm</systemitem> group:
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| 206 | </para>
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| 207 |
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| 208 | <screen role="root"><userinput>usermod -a -G kvm <replaceable><username></replaceable></userinput></screen>
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| 209 |
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| 210 | <para>
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| 211 | Install <application>qemu</application> by running the following
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| 212 | commands:
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| 213 | </para>
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| 214 |
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| 215 | <note>
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| 216 | <para>
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| 217 | Qemu is capable of running many targets. The build process
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| 218 | is also capable of building multiple targets at one time in a
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| 219 | comma delimited list assigned to <option>--target-list</option>. Run
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| 220 | <command>./configure --help</command> to get a complete list of
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| 221 | available targets.
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| 222 | </para>
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| 223 | </note>
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| 224 |
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| 225 |
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| 226 | <screen><userinput>if [ $(uname -m) = i686 ]; then
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| 227 | QEMU_ARCH=i386-softmmu
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| 228 | else
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| 229 | QEMU_ARCH=x86_64-softmmu
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| 230 | fi
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| 231 |
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| 232 |
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| 233 | mkdir -vp build &&
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| 234 | cd build &&
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| 235 |
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| 236 | ../configure --prefix=/usr \
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| 237 | --sysconfdir=/etc \
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| 238 | --localstatedir=/var \
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| 239 | --target-list=$QEMU_ARCH \
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| 240 | --audio-drv-list=alsa \
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| 241 | --disable-pa \
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| 242 | --docdir=/usr/share/doc/qemu-&qemu-version; &&
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| 243 |
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| 244 | unset QEMU_ARCH &&
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| 245 |
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| 246 | make</userinput></screen>
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| 247 |
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| 248 | <para>
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| 249 | <application>qemu</application> uses <command>ninja</command> as
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| 250 | a subprocess when building. To run the tests, issue:
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| 251 | <command>ninja test</command>. Two migration tests are known to fail.
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| 252 | </para>
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| 253 |
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| 254 | <para>
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| 255 | Now, as the &root; user:
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| 256 | </para>
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| 257 |
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| 258 | <screen role="root"><userinput>make install</userinput></screen>
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| 259 | <!-- now in LFS
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| 260 | <para>
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| 261 | You will also need to add an Udev rule so that the KVM device gets correct
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| 262 | permissions. As the &root; user, issue:
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| 263 | </para>
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| 264 |
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| 265 | <screen role="root"><userinput>cat > /etc/udev/rules.d/65-kvm.rules << "EOF"
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| 266 | <literal>KERNEL=="kvm", GROUP="kvm", MODE="0660"</literal>
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| 267 | EOF</userinput></screen>
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| 268 | -->
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| 269 | <para>
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| 270 | Change the permissions and ownership of a helper script, which is needed
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| 271 | when using the <quote>bridge</quote> network device (see below). Again
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| 272 | as the &root; user, issue:
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| 273 | </para>
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| 274 |
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| 275 | <note>
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| 276 | <para>
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| 277 | You need to add any users who might use the <quote>bridge</quote>
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| 278 | network device into the
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| 279 | <systemitem class="groupname">kvm</systemitem> group even if
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| 280 | &logind; is installed.
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| 281 | </para>
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| 282 | </note>
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| 283 |
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| 284 | <screen role="root"><userinput>chgrp kvm /usr/libexec/qemu-bridge-helper &&
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| 285 | chmod 4750 /usr/libexec/qemu-bridge-helper</userinput></screen>
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| 286 |
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| 287 | <note>
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| 288 | <para>
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| 289 | For convenience you may want to create a symbolic link to run
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| 290 | the installed program. For instance (as the &root; user):
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| 291 | </para>
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| 292 |
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| 293 | <screen role="root"><userinput>ln -sv qemu-system-`uname -m` /usr/bin/qemu</userinput></screen>
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| 294 | </note>
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| 295 |
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| 296 | </sect2>
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| 297 |
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| 298 | <sect2 role="commands">
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| 299 | <title>Command Explanations</title>
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| 300 |
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| 301 | <para>
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| 302 | <parameter>--audio-drv-list=alsa --disable-pa</parameter>: This switch
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| 303 | sets the audio driver to ALSA. See below for enabling other audio drivers.
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| 304 | </para>
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| 305 |
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| 306 | <para>
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| 307 | <option>--audio-drv-list=pa --disable-alsa</option>: This switch sets
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| 308 | the audio driver to pulseaudio. For other drivers see the
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| 309 | --audio-drv-list choices in the output of
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| 310 | <command>./configure --help</command>. The default audio driver is OSS.
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| 311 | To enable support for both alsa and pulseaudio, use
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| 312 | <option>--audio-drv-list=alsa,pa</option>.
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| 313 | </para>
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| 314 |
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| 315 | </sect2>
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| 316 |
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| 317 | <sect2 role="using">
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| 318 | <title>Using Qemu</title>
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| 319 |
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| 320 | <para>
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| 321 | Since using qemu means using a virtual computer, the steps to set up
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| 322 | the virtual machine are in close analogy with those to set up a real
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| 323 | computer. You'll need to decide about CPU, memory, disk, USB devices,
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| 324 | network card(s), screen size, etc. Once the <quote>hardware</quote> is
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| 325 | decided, you'll have for example to choose how to connect the machine
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| 326 | to internet, and/or to install an OS. In the following, we show basic
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| 327 | ways of performing those steps. But qemu is much more than this, and it
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| 328 | is strongly advised to read the qemu documentation in
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| 329 | <filename>/usr/share/doc/qemu-&qemu-version;/qemu-doc.html</filename>.
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| 330 | </para>
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| 331 |
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| 332 | <note>
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| 333 | <para>
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| 334 | It is standard practice to name the computer running qemu
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| 335 | <quote>host</quote> and the emulated machine running under qemu the
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| 336 | <quote>guest</quote>. We'll use those notations in the following.
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| 337 | </para>
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| 338 | </note>
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| 339 |
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| 340 | <note>
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| 341 | <para>
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| 342 | The following instructions assume the optional symbolic link,
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| 343 | <filename>qemu</filename>, has been created. Additionally,
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| 344 | <command>qemu</command> should be run in a graphical environment.
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| 345 | But it is possible to use qemu <quote>headless</quote> or through
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| 346 | SSH. See the documentation for the various possibilities.
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| 347 | </para>
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| 348 | </note>
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| 349 |
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| 350 | <bridgehead renderas="sect3">Disk</bridgehead>
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| 351 | <para>
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| 352 | A virtual disk may be set up in the following way:
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| 353 | </para>
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| 354 |
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| 355 | <screen><userinput>VDISK_SIZE=<replaceable>50G</replaceable>
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| 356 | VDISK_FILENAME=<replaceable>vdisk.img</replaceable>
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| 357 | qemu-img create -f qcow2 $VDISK_FILENAME $VDISK_SIZE</userinput></screen>
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| 358 |
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| 359 | <para>
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| 360 | The virtual disk size and filename should be adjusted as desired. The
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| 361 | actual size of the file will be less than specified, but will expand as
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| 362 | needed, so it is safe to put a high value.
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| 363 | </para>
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| 364 |
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| 365 | <bridgehead renderas="sect3">Operating System</bridgehead>
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| 366 | <para>
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| 367 | To install an operating system, download an iso image from your preferred
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| 368 | Linux distribution. For the purposes of this example, we'll use
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| 369 | <filename>Fedora-16-x86_64-Live-LXDE.iso</filename> in the current
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| 370 | directory. Run the following:
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| 371 | </para>
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| 372 |
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| 373 | <screen><userinput>qemu -enable-kvm \
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| 374 | -drive file=$VDISK_FILENAME \
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| 375 | -cdrom Fedora-16-x86_64-Live-LXDE.iso \
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| 376 | -boot d \
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| 377 | -m <replaceable>1G</replaceable></userinput></screen>
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| 378 |
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| 379 | <para>
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| 380 | Follow the normal installation procedures for the chosen distribution.
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| 381 | The <parameter>-boot</parameter> option specifies the boot order of
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| 382 | drives as a string of drive letters. Valid drive letters are: a, b
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| 383 | (floppy 1 and 2), c (first hard disk), d (first CD-ROM). The
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| 384 | <parameter>-m</parameter> option is the amount of memory to use for the
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| 385 | virtual machine. The choice depends on the load of the host. Modern
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| 386 | distributions should be comfortable with 1GB.
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| 387 | The <parameter>-enable-kvm</parameter> option allows hardware
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| 388 | acceleration. Without this switch, the emulation is much slower.
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| 389 | </para>
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| 390 |
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| 391 | <bridgehead renderas="sect3">Defining the virtual hardware</bridgehead>
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| 392 | <para>
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|---|
| 393 | The virtual machine hardware is defined by the qemu command line.
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|---|
| 394 | An example command is given below:
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| 395 | </para>
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|---|
| 396 |
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| 397 | <screen><userinput>qemu -enable-kvm \
|
|---|
| 398 | -smp 4 \
|
|---|
| 399 | -cpu host \
|
|---|
| 400 | -m 1G \
|
|---|
| 401 | -drive file=$VDISK_FILENAME \
|
|---|
| 402 | -cdrom grub-img.iso \
|
|---|
| 403 | -boot order=c,once=d,menu=on \
|
|---|
| 404 | -net nic,netdev=net0 \
|
|---|
| 405 | -netdev user,id=net0 \
|
|---|
| 406 | -device ac97 \
|
|---|
| 407 | -vga std \
|
|---|
| 408 | -serial mon:stdio \
|
|---|
| 409 | -name "fedora-16"</userinput></screen>
|
|---|
| 410 |
|
|---|
| 411 | <bridgehead renderas="sect3">Meaning of the command line options</bridgehead>
|
|---|
| 412 | <para>
|
|---|
| 413 | <parameter>-enable-kvm</parameter>: enable full KVM virtualization
|
|---|
| 414 | support. On some hardware, it may be necessary to add the undocumented
|
|---|
| 415 | <option>-machine smm=off</option> option in order to enable KVM.
|
|---|
| 416 | </para>
|
|---|
| 417 |
|
|---|
| 418 | <para>
|
|---|
| 419 | <parameter>-smp <N></parameter>: enable symmetric multiprocessing
|
|---|
| 420 | with <N> CPUs.
|
|---|
| 421 | </para>
|
|---|
| 422 |
|
|---|
| 423 | <para>
|
|---|
| 424 | <parameter>-cpu <model></parameter>: simulate CPU <model>.
|
|---|
| 425 | the list of supported models can be obtained with <option>-cpu
|
|---|
| 426 | help</option>.
|
|---|
| 427 | </para>
|
|---|
| 428 |
|
|---|
| 429 | <para>
|
|---|
| 430 | <parameter>-drive file=<filename></parameter>: defines a virtual
|
|---|
| 431 | disk whose image is stored in <filename><filename></filename>.
|
|---|
| 432 | </para>
|
|---|
| 433 |
|
|---|
| 434 | <para>
|
|---|
| 435 | <parameter>-cdrom grub-img.iso</parameter>: defines an iso formatted file
|
|---|
| 436 | to use as a cdrom. Here we use a grub rescue disk, which may turn handy
|
|---|
| 437 | when something goes wrong at boot time.
|
|---|
| 438 | </para>
|
|---|
| 439 |
|
|---|
| 440 | <para>
|
|---|
| 441 | <parameter>-boot order=c,once=d,menu=on</parameter>: defines the boot
|
|---|
| 442 | order for the virtual BIOS.
|
|---|
| 443 | </para>
|
|---|
| 444 |
|
|---|
| 445 | <para>
|
|---|
| 446 | <parameter>-net nic,netdev=<netid></parameter>: defines a network
|
|---|
| 447 | card connected to the network device with id <netid>.
|
|---|
| 448 | </para>
|
|---|
| 449 |
|
|---|
| 450 | <para>
|
|---|
| 451 | <parameter>-netdev user,id=<netid></parameter>: defines the
|
|---|
| 452 | network <quote>user</quote> device. This is a virtual local network
|
|---|
| 453 | with addresses 10.0.2.0/24, where the host has address 10.0.2.2 and
|
|---|
| 454 | acts as a gateway to internet, and with a name server at address
|
|---|
| 455 | 10.0.2.3, and an smb server at address 10.0.2.4. A builtin DHCP server
|
|---|
| 456 | can allocate addresses between 10.0.2.15 and 10.0.2.31.
|
|---|
| 457 | </para>
|
|---|
| 458 |
|
|---|
| 459 | <para>
|
|---|
| 460 | <parameter>-soundhw <model></parameter>: defines the soundcard
|
|---|
| 461 | model. The list may be obtained with <option>-soundhw help</option>.
|
|---|
| 462 | </para>
|
|---|
| 463 |
|
|---|
| 464 | <para>
|
|---|
| 465 | <parameter>-vga <type></parameter>: defines the type of VGA card
|
|---|
| 466 | to emulate. For <parameter>-vga std</parameter>, if you are building
|
|---|
| 467 | a Linux kernel for the guest, it's recommended to enable
|
|---|
| 468 | <option>CONFIG_DRM_BOCHS</option> (as a part of the kernel or a kernel
|
|---|
| 469 | module) to drive all the features of the emulated VGA card, and
|
|---|
| 470 | <option>CONFIG_FB</option> to display the Linux console on it. The
|
|---|
| 471 | other <option><type></option> values are not tested by the
|
|---|
| 472 | editors and may require additional dependencies.
|
|---|
| 473 | </para>
|
|---|
| 474 |
|
|---|
| 475 | <para>
|
|---|
| 476 | <parameter>-serial mon:stdio</parameter>: sends the serial port of the
|
|---|
| 477 | guest (<filename>/dev/ttyS0</filename> on linux guests), multiplexed with
|
|---|
| 478 | the qemu monitor, to the standard input and output of the qemu
|
|---|
| 479 | process.
|
|---|
| 480 | </para>
|
|---|
| 481 |
|
|---|
| 482 | <para>
|
|---|
| 483 | <parameter>-name <name></parameter>: sets the name of the guest.
|
|---|
| 484 | This name is displayed in the guest window caption. It may be useful
|
|---|
| 485 | if you run several guests at the same time.
|
|---|
| 486 | </para>
|
|---|
| 487 |
|
|---|
| 488 | <para>
|
|---|
| 489 | <option>-pflash /usr/share/qemu/edk2-x86_64-code.fd</option>: Load a
|
|---|
| 490 | pre-built EDK2 UEFI firmware, instead of the default PC BIOS. Use
|
|---|
| 491 | this option if you want to boot the guest OS with UEFI.
|
|---|
| 492 | </para>
|
|---|
| 493 |
|
|---|
| 494 | <para>
|
|---|
| 495 | <option>-drive file=<filename>,if=virtio</option>: Provide
|
|---|
| 496 | Virtio interface to the guest kernel for accessing the disk image,
|
|---|
| 497 | instead of simulating a real disk hardware. This can improve disk I/O
|
|---|
| 498 | performance, but it requires a Virtio driver in guest kernel. Use
|
|---|
| 499 | it instead of a plain <option>-drive</option> if the guest kernel
|
|---|
| 500 | supports Virtio. To build a Linux kernel with Virtio support for the
|
|---|
| 501 | guest, use
|
|---|
| 502 | <command>make defconfig && make kvm_guest.config</command> to
|
|---|
| 503 | create an initial kernel configuration with the Virtio drives enabled,
|
|---|
| 504 | then make your customization. And, if the guest kernel is Linux, the
|
|---|
| 505 | virtual disks using Virtio interface will be named
|
|---|
| 506 | <filename>vdx</filename> in the devtmpfs, instead of
|
|---|
| 507 | <filename>sdx</filename>.
|
|---|
| 508 | </para>
|
|---|
| 509 |
|
|---|
| 510 | <para>
|
|---|
| 511 | <option>-net nic,netdev=net0,model=virtio-net-pci</option>: Provide
|
|---|
| 512 | Virtio interface to the guest kernel for accessing the network
|
|---|
| 513 | interface, instead of simulating a real network interface card. This
|
|---|
| 514 | can improve network I/O performance, but it requires a Virtio driver
|
|---|
| 515 | in guest kernel. Use it instead of a plain <option>-net</option> if
|
|---|
| 516 | the guest kernel supports Virtio.
|
|---|
| 517 | </para>
|
|---|
| 518 |
|
|---|
| 519 | <bridgehead renderas="sect3">Controlling the Emulated Display</bridgehead>
|
|---|
| 520 | <para>
|
|---|
| 521 | To set the resolution of the emulated display for a Xorg server
|
|---|
| 522 | running in the guest Linux system, read <xref linkend='xdisplay'/>.
|
|---|
| 523 | </para>
|
|---|
| 524 |
|
|---|
| 525 | <bridgehead renderas="sect3">Networking</bridgehead>
|
|---|
| 526 | <para>
|
|---|
| 527 | The above solution for networking allows the guest to access the local
|
|---|
| 528 | network through the host (and possibly to access internet through the
|
|---|
| 529 | local routers), but the converse is not true. Not even the host can
|
|---|
| 530 | access the guest, unless port forwarding is enabled. And in the case
|
|---|
| 531 | several guests are running, they cannot communicate with each other.
|
|---|
| 532 | Other network devices can be used for this purpose. For example, there
|
|---|
| 533 | is the <quote>socket</quote> device, which allows several guests to
|
|---|
| 534 | share a common virtual network. In the following, we describe in more
|
|---|
| 535 | details how to set up the <quote>bridge</quote> device, which allows
|
|---|
| 536 | the guests to appear as if connected to the local network. All the
|
|---|
| 537 | commands below should be run as the <systemitem
|
|---|
| 538 | class="username">root</systemitem> user.
|
|---|
| 539 | </para>
|
|---|
| 540 |
|
|---|
| 541 | <para revision="sysv">
|
|---|
| 542 | Set up bridging with <xref linkend="bridgeutils"/>. Only the physical
|
|---|
| 543 | interface(s) should be set up at boot. The virtual interface(s) will be
|
|---|
| 544 | added as needed when qemu is started.
|
|---|
| 545 | </para>
|
|---|
| 546 |
|
|---|
| 547 | <para revision="systemd">
|
|---|
| 548 | <!-- On SYS-V, IP_FORWARD is enabled by the bridge script. -->
|
|---|
| 549 | Allow the host to forward IP packets:
|
|---|
| 550 | </para>
|
|---|
| 551 |
|
|---|
| 552 | <screen role="root"
|
|---|
| 553 | revision="systemd"><userinput>sysctl -w net.ipv4.ip_forward=1</userinput></screen>
|
|---|
| 554 |
|
|---|
| 555 | <para revision="systemd">
|
|---|
| 556 | To make this permanent, add the command to
|
|---|
| 557 | <filename>/etc/sysctl.d/60-net-forward.conf:</filename>
|
|---|
| 558 | </para>
|
|---|
| 559 |
|
|---|
| 560 | <screen role="root"
|
|---|
| 561 | revision="systemd"><userinput>cat >> /etc/sysctl.d/60-net-forward.conf << EOF
|
|---|
| 562 | <literal>net.ipv4.ip_forward=1</literal>
|
|---|
| 563 | EOF</userinput></screen>
|
|---|
| 564 |
|
|---|
| 565 | <para>
|
|---|
| 566 | Set up a required configuration file:
|
|---|
| 567 | </para>
|
|---|
| 568 |
|
|---|
| 569 | <!-- /etc/qemu has not been installed by "make install" since version 2.4 -->
|
|---|
| 570 | <screen role="root"><userinput>install -vdm 755 /etc/qemu &&
|
|---|
| 571 | echo allow br0 > /etc/qemu/bridge.conf</userinput></screen>
|
|---|
| 572 |
|
|---|
| 573 | <para>
|
|---|
| 574 | In the qemu command line above, replace the switch
|
|---|
| 575 | <parameter>-netdev user,...</parameter> with
|
|---|
| 576 | <parameter>-netdev bridge,...</parameter>.
|
|---|
| 577 | </para>
|
|---|
| 578 |
|
|---|
| 579 | </sect2>
|
|---|
| 580 |
|
|---|
| 581 | <sect2 role="content">
|
|---|
| 582 | <title>Contents</title>
|
|---|
| 583 |
|
|---|
| 584 | <segmentedlist>
|
|---|
| 585 | <segtitle>Installed Programs</segtitle>
|
|---|
| 586 | <segtitle>Installed Library</segtitle>
|
|---|
| 587 | <segtitle>Installed Directories</segtitle>
|
|---|
| 588 |
|
|---|
| 589 | <seglistitem>
|
|---|
| 590 | <seg>
|
|---|
| 591 | elf2dmp,
|
|---|
| 592 | qemu (symlink),
|
|---|
| 593 | qemu-edid,
|
|---|
| 594 | qemu-ga,
|
|---|
| 595 | qemu-img,
|
|---|
| 596 | qemu-io,
|
|---|
| 597 | qemu-keymap,
|
|---|
| 598 | qemu-nbd,
|
|---|
| 599 | qemu-pr-helper,
|
|---|
| 600 | qemu-storage-daemon, and
|
|---|
| 601 | qemu-system-<arch>
|
|---|
| 602 | </seg>
|
|---|
| 603 | <seg>None</seg>
|
|---|
| 604 | <seg>
|
|---|
| 605 | /usr/share/qemu and
|
|---|
| 606 | /usr/share/doc/qemu-&qemu-version; (optional)
|
|---|
| 607 | </seg>
|
|---|
| 608 | </seglistitem>
|
|---|
| 609 | </segmentedlist>
|
|---|
| 610 |
|
|---|
| 611 | <variablelist>
|
|---|
| 612 | <bridgehead renderas="sect3">Short Description</bridgehead>
|
|---|
| 613 | <?dbfo list-presentation="list"?>
|
|---|
| 614 | <?dbhtml list-presentation="table"?>
|
|---|
| 615 |
|
|---|
| 616 | <varlistentry id="elf2dmp">
|
|---|
| 617 | <term><command>elf2dmp</command></term>
|
|---|
| 618 | <listitem>
|
|---|
| 619 | <para>
|
|---|
| 620 | Converts files from elf to dmp format
|
|---|
| 621 | </para>
|
|---|
| 622 | <indexterm zone="qemu elf2dmp">
|
|---|
| 623 | <primary sortas="b-elf2dmp">elf2dmp</primary>
|
|---|
| 624 | </indexterm>
|
|---|
| 625 | </listitem>
|
|---|
| 626 | </varlistentry>
|
|---|
| 627 |
|
|---|
| 628 | <varlistentry id="qemu-edid">
|
|---|
| 629 | <term><command>qemu-edid</command></term>
|
|---|
| 630 | <listitem>
|
|---|
| 631 | <para>
|
|---|
| 632 | is a test tool for the qemu EDID generator
|
|---|
| 633 | </para>
|
|---|
| 634 | <indexterm zone="qemu qemu-edid">
|
|---|
| 635 | <primary sortas="b-qemu-edid">qemu-edid</primary>
|
|---|
| 636 | </indexterm>
|
|---|
| 637 | </listitem>
|
|---|
| 638 | </varlistentry>
|
|---|
| 639 |
|
|---|
| 640 | <varlistentry id="qemu-ga">
|
|---|
| 641 | <term><command>qemu-ga</command></term>
|
|---|
| 642 | <listitem>
|
|---|
| 643 | <para>
|
|---|
| 644 | implements support for QMP (QEMU Monitor Protocol) commands and
|
|---|
| 645 | events that terminate and originate respectively within the guest
|
|---|
| 646 | using an agent built as part of QEMU
|
|---|
| 647 | </para>
|
|---|
| 648 | <indexterm zone="qemu qemu-ga">
|
|---|
| 649 | <primary sortas="b-qemu-ga">qemu-ga</primary>
|
|---|
| 650 | </indexterm>
|
|---|
| 651 | </listitem>
|
|---|
| 652 | </varlistentry>
|
|---|
| 653 |
|
|---|
| 654 | <varlistentry id="qemu-img">
|
|---|
| 655 | <term><command>qemu-img</command></term>
|
|---|
| 656 | <listitem>
|
|---|
| 657 | <para>
|
|---|
| 658 | provides commands to manage QEMU disk images
|
|---|
| 659 | </para>
|
|---|
| 660 | <indexterm zone="qemu qemu-img">
|
|---|
| 661 | <primary sortas="b-qemu-img">qemu-img</primary>
|
|---|
| 662 | </indexterm>
|
|---|
| 663 | </listitem>
|
|---|
| 664 | </varlistentry>
|
|---|
| 665 |
|
|---|
| 666 | <varlistentry id="qemu-io">
|
|---|
| 667 | <term><command>qemu-io</command></term>
|
|---|
| 668 | <listitem>
|
|---|
| 669 | <para>
|
|---|
| 670 | is a diagnostic and manipulation program for (virtual) memory
|
|---|
| 671 | media. It is still at an early stage of development
|
|---|
| 672 | </para>
|
|---|
| 673 | <indexterm zone="qemu qemu-io">
|
|---|
| 674 | <primary sortas="b-qemu-io">qemu-io</primary>
|
|---|
| 675 | </indexterm>
|
|---|
| 676 | </listitem>
|
|---|
| 677 | </varlistentry>
|
|---|
| 678 |
|
|---|
| 679 | <varlistentry id="qemu-keymap">
|
|---|
| 680 | <term><command>qemu-keymap</command></term>
|
|---|
| 681 | <listitem>
|
|---|
| 682 | <para>
|
|---|
| 683 | generates qemu reverse keymaps from xkb keymaps,
|
|---|
| 684 | which can be used with the qemu "-k" command line switch
|
|---|
| 685 | </para>
|
|---|
| 686 | <indexterm zone="qemu qemu-keymap">
|
|---|
| 687 | <primary sortas="b-qemu-keymap">qemu-keymap</primary>
|
|---|
| 688 | </indexterm>
|
|---|
| 689 | </listitem>
|
|---|
| 690 | </varlistentry>
|
|---|
| 691 |
|
|---|
| 692 |
|
|---|
| 693 | <varlistentry id="qemu-nbd">
|
|---|
| 694 | <term><command>qemu-nbd</command></term>
|
|---|
| 695 | <listitem>
|
|---|
| 696 | <para>
|
|---|
| 697 | exports Qemu disk images using the QEMU Disk Network Block
|
|---|
| 698 | Device (NBD) protocol
|
|---|
| 699 | </para>
|
|---|
| 700 | <indexterm zone="qemu qemu-nbd">
|
|---|
| 701 | <primary sortas="b-qemu-nbd">qemu-nbd</primary>
|
|---|
| 702 | </indexterm>
|
|---|
| 703 | </listitem>
|
|---|
| 704 | </varlistentry>
|
|---|
| 705 |
|
|---|
| 706 | <varlistentry id="qemu-pr-helper">
|
|---|
| 707 | <term><command>qemu-pr-helper</command></term>
|
|---|
| 708 | <listitem>
|
|---|
| 709 | <para>
|
|---|
| 710 | Implements the persistent reservation helper for QEMU
|
|---|
| 711 | </para>
|
|---|
| 712 | <indexterm zone="qemu qemu-pr-helper">
|
|---|
| 713 | <primary sortas="b-qemu-pr-helper">qemu-pr-helper</primary>
|
|---|
| 714 | </indexterm>
|
|---|
| 715 | </listitem>
|
|---|
| 716 | </varlistentry>
|
|---|
| 717 |
|
|---|
| 718 | <varlistentry id="qemu-storage-daemon">
|
|---|
| 719 | <term><command>qemu-storage-daemon</command></term>
|
|---|
| 720 | <listitem>
|
|---|
| 721 | <para>
|
|---|
| 722 | allows to modify disk images using the QEMU Monitor Protocol (QMP)
|
|---|
| 723 | without running a VM
|
|---|
| 724 | </para>
|
|---|
| 725 | <indexterm zone="qemu qemu-storage-daemon">
|
|---|
| 726 | <primary sortas="b-qemu-storage-daemon">qemu-storage-daemon</primary>
|
|---|
| 727 | </indexterm>
|
|---|
| 728 | </listitem>
|
|---|
| 729 | </varlistentry>
|
|---|
| 730 |
|
|---|
| 731 | <varlistentry id="qemu-system">
|
|---|
| 732 | <term><command>qemu-system-x86_64</command></term>
|
|---|
| 733 | <listitem>
|
|---|
| 734 | <para>
|
|---|
| 735 | is the QEMU PC System emulator
|
|---|
| 736 | </para>
|
|---|
| 737 | <indexterm zone="qemu qemu-system">
|
|---|
| 738 | <primary sortas="b-qemu-system">qemu-system-x86_64</primary>
|
|---|
| 739 | </indexterm>
|
|---|
| 740 | </listitem>
|
|---|
| 741 | </varlistentry>
|
|---|
| 742 |
|
|---|
| 743 | </variablelist>
|
|---|
| 744 |
|
|---|
| 745 | </sect2>
|
|---|
| 746 |
|
|---|
| 747 | </sect1>
|
|---|
