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f2f9742d4d
The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
97 lines
4.0 KiB
XML
97 lines
4.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<body>
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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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<model>core2duo</model>
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<vendor>Intel</vendor>
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<topology sockets="1" cores="2" threads="1"/>
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<feature name="lahf_lm"/>
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<feature name='xtpr'/>
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...
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</cpu>
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<power_management>
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<suspend_mem/>
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<suspend_disk/>
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<suspend_hybrid/>
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<power_management/>
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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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<cpuselection/>
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<deviceboot/>
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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
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capabilities, such as CPU properties and the power
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management features of the host platform. CPU models are
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shown as additional features relative to the closest base
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model, within a feature block (the block is similar to what
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you will find in a Xen fully virtualized domain
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description). Further, the power management features
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supported by the host are shown, such as Suspend-to-RAM (S3),
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Suspend-to-Disk (S4) and Hybrid-Suspend (a combination of S3
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and S4). In case the host does not support
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any such feature, then an empty <power_management/>
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tag will be shown. </p>
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<p>The second block (in blue) indicates the paravirtualization
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support of the Xen support, you will see the os_type of xen
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to indicate a paravirtual kernel, then architecture
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information and potential features.</p>
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<p>The third block (in green) gives similar information but
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when running a 32 bit OS fully virtualized with Xen using
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the hvm support.</p>
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<p>This section is likely to be updated and augmented in the
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future,
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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
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mailing-list archives.</p>
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</body>
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</html>
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