virsh --connect qemu:///system capabilities

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virsh --connect qemu:///system capabilities

<capabilities>

  <host>
    <uuid>01aa4d56-ec8d-5b81-8574-f8a2a1451771</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>Broadwell-noTSX-IBRS</model>
      <vendor>Intel</vendor>
      <microcode version='154'/>
      <topology sockets='8' dies='1' cores='1' threads='1'/>
      <feature name='vme'/>
      <feature name='ss'/>
      <feature name='osxsave'/>
      <feature name='f16c'/>
      <feature name='rdrand'/>
      <feature name='hypervisor'/>
      <feature name='arat'/>
      <feature name='tsc_adjust'/>
      <feature name='clflushopt'/>
      <feature name='stibp'/>
      <feature name='arch-capabilities'/>
      <feature name='ssbd'/>
      <feature name='xsaveopt'/>
      <feature name='xsavec'/>
      <feature name='xsaves'/>
      <feature name='pdpe1gb'/>
      <feature name='abm'/>
      <feature name='invtsc'/>
      <pages unit='KiB' size='4'/>
      <pages unit='KiB' size='2048'/>
      <pages unit='KiB' size='1048576'/>
    </cpu>
    <power_management>
      <suspend_mem/>
      <suspend_disk/>
      <suspend_hybrid/>
    </power_management>
    <iommu support='no'/>
    <migration_features>
      <live/>
      <uri_transports>
        <uri_transport>tcp</uri_transport>
        <uri_transport>rdma</uri_transport>
      </uri_transports>
    </migration_features>
    <topology>
      <cells num='1'>
        <cell id='0'>
          <memory unit='KiB'>4025324</memory>
          <pages unit='KiB' size='4'>1006331</pages>
          <pages unit='KiB' size='2048'>0</pages>
          <pages unit='KiB' size='1048576'>0</pages>
          <distances>
            <sibling id='0' value='10'/>
          </distances>
          <cpus num='8'>
            <cpu id='0' socket_id='0' die_id='0' core_id='0' siblings='0'/>
            <cpu id='1' socket_id='2' die_id='0' core_id='0' siblings='1'/>
            <cpu id='2' socket_id='4' die_id='0' core_id='0' siblings='2'/>
            <cpu id='3' socket_id='6' die_id='0' core_id='0' siblings='3'/>
            <cpu id='4' socket_id='8' die_id='0' core_id='0' siblings='4'/>
            <cpu id='5' socket_id='10' die_id='0' core_id='0' siblings='5'/>
            <cpu id='6' socket_id='12' die_id='0' core_id='0' siblings='6'/>
            <cpu id='7' socket_id='14' die_id='0' core_id='0' siblings='7'/>
          </cpus>
        </cell>
      </cells>
    </topology>
    <cache>
      <bank id='0' level='3' type='both' size='8' unit='MiB' cpus='0'/>
      <bank id='2' level='3' type='both' size='8' unit='MiB' cpus='1'/>
      <bank id='4' level='3' type='both' size='8' unit='MiB' cpus='2'/>
      <bank id='6' level='3' type='both' size='8' unit='MiB' cpus='3'/>
      <bank id='8' level='3' type='both' size='8' unit='MiB' cpus='4'/>
      <bank id='10' level='3' type='both' size='8' unit='MiB' cpus='5'/>
      <bank id='12' level='3' type='both' size='8' unit='MiB' cpus='6'/>
      <bank id='14' level='3' type='both' size='8' unit='MiB' cpus='7'/>
    </cache>
    <secmodel>
      <model>apparmor</model>
      <doi>0</doi>
    </secmodel>
    <secmodel>
      <model>dac</model>
      <doi>0</doi>
      <baselabel type='kvm'>+64055:+129</baselabel>
      <baselabel type='qemu'>+64055:+129</baselabel>
    </secmodel>
  </host>

  <guest>
    <os_type>hvm</os_type>
    <arch name='i686'>
      <wordsize>32</wordsize>
      <emulator>/usr/bin/qemu-system-i386</emulator>
      <machine maxCpus='255'>pc-i440fx-groovy</machine>
      <machine canonical='pc-i440fx-groovy' maxCpus='255'>ubuntu</machine>
      <machine maxCpus='255'>pc-i440fx-2.12</machine>
      <machine maxCpus='255'>pc-i440fx-2.0</machine>
      <machine maxCpus='255'>pc-i440fx-xenial</machine>
      <machine maxCpus='288'>pc-q35-4.2</machine>
      <machine maxCpus='255'>pc-i440fx-2.5</machine>
      <machine maxCpus='255'>pc-i440fx-4.2</machine>
      <machine maxCpus='255'>pc-i440fx-focal</machine>
      <machine maxCpus='255'>pc-q35-xenial</machine>
      <machine maxCpus='255'>pc-i440fx-1.5</machine>
      <machine maxCpus='255'>pc-q35-2.7</machine>
      <machine maxCpus='288'>pc-q35-eoan-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-disco-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-zesty</machine>
      <machine maxCpus='288'>pc-q35-groovy</machine>
      <machine canonical='pc-q35-groovy' maxCpus='288'>ubuntu-q35</machine>
      <machine maxCpus='288'>pc-q35-artful</machine>
      <machine maxCpus='255'>pc-i440fx-trusty</machine>
      <machine maxCpus='255'>pc-i440fx-2.2</machine>
      <machine maxCpus='255'>pc-i440fx-eoan-hpb</machine>
      <machine maxCpus='288'>pc-q35-focal-hpb</machine>
      <machine maxCpus='255'>pc-1.1</machine>
      <machine maxCpus='288'>pc-q35-bionic-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-artful</machine>
      <machine maxCpus='255'>pc-i440fx-2.7</machine>
      <machine maxCpus='255'>pc-i440fx-yakkety</machine>
      <machine maxCpus='255'>pc-q35-2.4</machine>
      <machine maxCpus='288'>pc-q35-cosmic-hpb</machine>
      <machine maxCpus='288'>pc-q35-2.10</machine>
      <machine maxCpus='255'>pc-i440fx-1.7</machine>
      <machine maxCpus='288'>pc-q35-2.9</machine>
      <machine maxCpus='255'>pc-i440fx-2.11</machine>
      <machine maxCpus='288'>pc-q35-3.1</machine>
      <machine maxCpus='288'>pc-q35-4.1</machine>
      <machine maxCpus='255'>pc-i440fx-2.4</machine>
      <machine maxCpus='255'>pc-1.3</machine>
      <machine maxCpus='255'>pc-i440fx-4.1</machine>
      <machine maxCpus='288'>pc-q35-eoan</machine>
      <machine maxCpus='255'>pc-i440fx-2.9</machine>
      <machine maxCpus='255'>pc-i440fx-bionic-hpb</machine>
      <machine maxCpus='1'>isapc</machine>
      <machine maxCpus='255'>pc-i440fx-1.4</machine>
      <machine maxCpus='288'>pc-q35-cosmic</machine>
      <machine maxCpus='255'>pc-q35-2.6</machine>
      <machine maxCpus='255'>pc-i440fx-3.1</machine>
      <machine maxCpus='288'>pc-q35-bionic</machine>
      <machine maxCpus='288'>pc-q35-disco-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-cosmic</machine>
      <machine maxCpus='288'>pc-q35-2.12</machine>
      <machine maxCpus='255'>pc-i440fx-bionic</machine>
      <machine maxCpus='288'>pc-q35-groovy-hpb</machine>
      <machine maxCpus='288'>pc-q35-disco</machine>
      <machine maxCpus='255'>pc-i440fx-cosmic-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-2.1</machine>
      <machine maxCpus='255'>pc-1.0</machine>
      <machine maxCpus='255'>pc-i440fx-wily</machine>
      <machine maxCpus='255'>pc-i440fx-2.6</machine>
      <machine maxCpus='288'>pc-q35-4.0.1</machine>
      <machine maxCpus='255'>pc-i440fx-1.6</machine>
      <machine maxCpus='288'>pc-q35-5.0</machine>
      <machine canonical='pc-q35-5.0' maxCpus='288'>q35</machine>
      <machine maxCpus='288'>pc-q35-2.8</machine>
      <machine maxCpus='255'>pc-i440fx-2.10</machine>
      <machine maxCpus='288'>pc-q35-3.0</machine>
      <machine maxCpus='288'>pc-q35-zesty</machine>
      <machine maxCpus='288'>pc-q35-4.0</machine>
      <machine maxCpus='288'>pc-q35-focal</machine>
      <machine maxCpus='288'>microvm</machine>
      <machine maxCpus='255'>pc-i440fx-2.3</machine>
      <machine maxCpus='255'>pc-i440fx-disco</machine>
      <machine maxCpus='255'>pc-1.2</machine>
      <machine maxCpus='255'>pc-i440fx-4.0</machine>
      <machine maxCpus='255'>pc-i440fx-focal-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-groovy-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-5.0</machine>
      <machine canonical='pc-i440fx-5.0' maxCpus='255'>pc</machine>
      <machine maxCpus='255'>pc-i440fx-2.8</machine>
      <machine maxCpus='255'>pc-i440fx-eoan</machine>
      <machine maxCpus='255'>pc-q35-2.5</machine>
      <machine maxCpus='255'>pc-i440fx-3.0</machine>
      <machine maxCpus='255'>pc-q35-yakkety</machine>
      <machine maxCpus='288'>pc-q35-2.11</machine>
      <domain type='qemu'/>
    </arch>
    <features>
      <pae/>
      <nonpae/>
      <acpi default='on' toggle='yes'/>
      <apic default='on' toggle='no'/>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
    </features>
  </guest>

  <guest>
    <os_type>hvm</os_type>
    <arch name='x86_64'>
      <wordsize>64</wordsize>
      <emulator>/usr/bin/qemu-system-x86_64</emulator>
      <machine maxCpus='255'>pc-i440fx-groovy</machine>
      <machine canonical='pc-i440fx-groovy' maxCpus='255'>ubuntu</machine>
      <machine maxCpus='255'>pc-i440fx-2.12</machine>
      <machine maxCpus='255'>pc-i440fx-2.0</machine>
      <machine maxCpus='255'>pc-i440fx-xenial</machine>
      <machine maxCpus='288'>pc-q35-4.2</machine>
      <machine maxCpus='255'>pc-i440fx-2.5</machine>
      <machine maxCpus='255'>pc-i440fx-4.2</machine>
      <machine maxCpus='255'>pc-i440fx-focal</machine>
      <machine maxCpus='255'>pc-q35-xenial</machine>
      <machine maxCpus='255'>pc-i440fx-1.5</machine>
      <machine maxCpus='255'>pc-q35-2.7</machine>
      <machine maxCpus='288'>pc-q35-eoan-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-zesty</machine>
      <machine maxCpus='255'>pc-i440fx-disco-hpb</machine>
      <machine maxCpus='288'>pc-q35-groovy</machine>
      <machine canonical='pc-q35-groovy' maxCpus='288'>ubuntu-q35</machine>
      <machine maxCpus='288'>pc-q35-artful</machine>
      <machine maxCpus='255'>pc-i440fx-trusty</machine>
      <machine maxCpus='255'>pc-i440fx-2.2</machine>
      <machine maxCpus='255'>pc-i440fx-eoan-hpb</machine>
      <machine maxCpus='288'>pc-q35-focal-hpb</machine>
      <machine maxCpus='255'>pc-1.1</machine>
      <machine maxCpus='288'>pc-q35-bionic-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-artful</machine>
      <machine maxCpus='255'>pc-i440fx-2.7</machine>
      <machine maxCpus='255'>pc-i440fx-yakkety</machine>
      <machine maxCpus='255'>pc-q35-2.4</machine>
      <machine maxCpus='288'>pc-q35-cosmic-hpb</machine>
      <machine maxCpus='288'>pc-q35-2.10</machine>
      <machine maxCpus='255'>pc-i440fx-1.7</machine>
      <machine maxCpus='288'>pc-q35-2.9</machine>
      <machine maxCpus='255'>pc-i440fx-2.11</machine>
      <machine maxCpus='288'>pc-q35-3.1</machine>
      <machine maxCpus='288'>pc-q35-4.1</machine>
      <machine maxCpus='255'>pc-i440fx-2.4</machine>
      <machine maxCpus='255'>pc-1.3</machine>
      <machine maxCpus='255'>pc-i440fx-4.1</machine>
      <machine maxCpus='288'>pc-q35-eoan</machine>
      <machine maxCpus='255'>pc-i440fx-2.9</machine>
      <machine maxCpus='255'>pc-i440fx-bionic-hpb</machine>
      <machine maxCpus='1'>isapc</machine>
      <machine maxCpus='255'>pc-i440fx-1.4</machine>
      <machine maxCpus='288'>pc-q35-cosmic</machine>
      <machine maxCpus='255'>pc-q35-2.6</machine>
      <machine maxCpus='288'>pc-q35-bionic</machine>
      <machine maxCpus='255'>pc-i440fx-3.1</machine>
      <machine maxCpus='288'>pc-q35-disco-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-cosmic</machine>
      <machine maxCpus='288'>pc-q35-2.12</machine>
      <machine maxCpus='255'>pc-i440fx-bionic</machine>
      <machine maxCpus='288'>pc-q35-groovy-hpb</machine>
      <machine maxCpus='288'>pc-q35-disco</machine>
      <machine maxCpus='255'>pc-i440fx-cosmic-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-2.1</machine>
      <machine maxCpus='255'>pc-1.0</machine>
      <machine maxCpus='255'>pc-i440fx-wily</machine>
      <machine maxCpus='255'>pc-i440fx-2.6</machine>
      <machine maxCpus='288'>pc-q35-4.0.1</machine>
      <machine maxCpus='255'>pc-i440fx-1.6</machine>
      <machine maxCpus='288'>pc-q35-5.0</machine>
      <machine canonical='pc-q35-5.0' maxCpus='288'>q35</machine>
      <machine maxCpus='288'>pc-q35-2.8</machine>
      <machine maxCpus='255'>pc-i440fx-2.10</machine>
      <machine maxCpus='288'>pc-q35-3.0</machine>
      <machine maxCpus='288'>pc-q35-zesty</machine>
      <machine maxCpus='288'>pc-q35-4.0</machine>
      <machine maxCpus='288'>microvm</machine>
      <machine maxCpus='288'>pc-q35-focal</machine>
      <machine maxCpus='255'>pc-i440fx-2.3</machine>
      <machine maxCpus='255'>pc-i440fx-focal-hpb</machine>
      <machine maxCpus='255'>pc-1.2</machine>
      <machine maxCpus='255'>pc-i440fx-4.0</machine>
      <machine maxCpus='255'>pc-i440fx-disco</machine>
      <machine maxCpus='255'>pc-i440fx-groovy-hpb</machine>
      <machine maxCpus='255'>pc-i440fx-5.0</machine>
      <machine canonical='pc-i440fx-5.0' maxCpus='255'>pc</machine>
      <machine maxCpus='255'>pc-i440fx-2.8</machine>
      <machine maxCpus='255'>pc-i440fx-eoan</machine>
      <machine maxCpus='255'>pc-q35-2.5</machine>
      <machine maxCpus='255'>pc-i440fx-3.0</machine>
      <machine maxCpus='255'>pc-q35-yakkety</machine>
      <machine maxCpus='288'>pc-q35-2.11</machine>
      <domain type='qemu'/>
    </arch>
    <features>
      <acpi default='on' toggle='yes'/>
      <apic default='on' toggle='no'/>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
    </features>
  </guest>

</capabilities>

Related terms

See also

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