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HTML
175 lines
8.3 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<!--
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This file is autogenerated from formatcaps.html.in
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Do not edit this file. Changes will be lost.
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-->
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<title>libvirt: Driver capabilities XML format</title>
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<meta name="description" content="libvirt, virtualization, virtualization API" />
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<div id="header">
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<input id="submit" name="submit" type="submit" value="Search" />
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<div id="body">
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<div id="content">
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<h1>Driver capabilities XML format</h1>
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<p>As new virtualization engine support gets added to libvirt, and to handle
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cases like QEmu supporting a variety of emulations, a query interface has
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been added in 0.2.1 allowing to list the set of supported virtualization
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capabilities on the host:</p>
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<pre> char * virConnectGetCapabilities (virConnectPtr conn);</pre>
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<p>The value returned is an XML document listing the virtualization
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capabilities of the host and virtualization engine to which
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<code>@conn</code> is connected. One can test it using <code>virsh</code>
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command line tool command '<code>capabilities</code>', it dumps the XML
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associated to the current connection. For example in the case of a 64 bits
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machine with hardware virtualization capabilities enabled in the chip and
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BIOS you will see</p>
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<pre><capabilities>
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<span style="color: #E50000"><host>
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<cpu>
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<arch>x86_64</arch>
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<features>
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<vmx/>
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</features>
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</cpu>
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</host></span>
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<!-- xen-3.0-x86_64 -->
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<span style="color: #0000E5"><guest>
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<os_type>xen</os_type>
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<arch name="x86_64">
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<wordsize>64</wordsize>
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<domain type="xen"></domain>
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<emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
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</arch>
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<features>
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</features>
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</guest></span>
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<!-- hvm-3.0-x86_32 -->
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<span style="color: #00B200"><guest>
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<os_type>hvm</os_type>
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<arch name="i686">
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<wordsize>32</wordsize>
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<domain type="xen"></domain>
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<emulator>/usr/lib/xen/bin/qemu-dm</emulator>
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<machine>pc</machine>
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<machine>isapc</machine>
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<loader>/usr/lib/xen/boot/hvmloader</loader>
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</arch>
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<features>
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</features>
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</guest></span>
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...
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</capabilities></pre>
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<p>The first block (in red) indicates the host hardware capabilities, currently
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it is limited to the CPU properties but other information may be available,
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it shows the CPU architecture, and the features of the chip (the feature
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block is similar to what you will find in a Xen fully virtualized domain
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description).</p>
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<p>The second block (in blue) indicates the paravirtualization support of the
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Xen support, you will see the os_type of xen to indicate a paravirtual
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kernel, then architecture information and potential features.</p>
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<p>The third block (in green) gives similar information but when running a
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32 bit OS fully virtualized with Xen using the hvm support.</p>
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<p>This section is likely to be updated and augmented in the future, see <a href="https://www.redhat.com/archives/libvir-list/2007-March/msg00215.html">the
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discussion</a> which led to the capabilities format in the mailing-list
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archives.</p>
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</div>
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<a title="Description of the XML formats used in libvirt" class="active" href="format.html">XML format</a>
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<a title="The domain XML format" class="inactive" href="formatdomain.html">Domains</a>
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</li><li>
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<a title="The virtual network XML format" class="inactive" href="formatnetwork.html">Networks</a>
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</li><li>
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<a title="The storage pool and volume XML format" class="inactive" href="formatstorage.html">Storage</a>
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<span class="active">Capabilities</span>
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<a title="The host device XML format" class="inactive" href="formatnode.html">Node Devices</a>
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</li></ul>
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</li><li>
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<div id="footer">
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<div id="projects">
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<dl id="p1"><dt>
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<a href="http://augeas.net/">Augeas</a>
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</dt><dd>
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<span>A configuration editing tool and API</span>
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</dd><dt>
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<a href="http://libvirt.org/">libvirt</a>
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</dt><dd>
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<span>The open source virtualization API</span>
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</dd></dl>
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<dl id="p2"><dt>
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<a href="http://cobbler.et.redhat.com/">Cobbler</a>
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</dt><dd>
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<span>OS provisioning and profile management</span>
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</dd><dt>
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<a href="http://ovirt.org/">oVirt</a>
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</dt><dd>
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<span>Virtualization management across the data center</span>
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</dd></dl>
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<dl id="p3"><dt>
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<a href="http://freeipa.org/">FreeIPA</a>
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</dt><dd>
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<span>Identity, policy and audit management</span>
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</dd><dt>
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<a href="http://virt-manager.org/">Virtual Machine Manager</a>
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</dt><dd>
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<span>Virtualization management from the desktop</span>
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</dd></dl>
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Sponsored by:<br /><a href="http://et.redhat.com/"><img src="redhat.gif" alt="Project sponsored by Red Hat" /></a></p>
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