nodedev-dumpxml

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Displays the properties, in node-device XML format, of a host resource that is represented in sysfs on the KVM host and that can be detected by libvirt.

Syntax

Selected options

<nodedev_name>: Specifies a host resource as listed with the virsh nodedev-list command.

Usage

Managing mediated devices for DASD with libvirt

Examples

This example displays the properties of a mediated device mdev_96c03c6a_a109_44fe_816a_ba371542164b_0_0_0072.

$ virsh nodedev-dumpxml mdev_96c03c6a_a109_44fe_816a_ba371542164b_0_0_0072
<device>
  <name>mdev_96c03c6a_a109_44fe_816a_ba371542164b_0_0_0072</name>
  <path>/sys/devices/css0/0.0.0072/96c03c6a-a109-44fe-816a-ba371542164b</path>
  <parent>css_0_0_0072</parent>
  <driver>
    <name>vfio_mdev</name>
  </driver>
  <capability type="mdev">
    <type id="vfio_ccw-io"/>
    <uuid>96c03c6a-a109-44fe-816a-ba371542164b</uuid>
    <iommuGroup number="1"/>
  </capability>
</device>

This example displays the properties of subchannel 0.0.0072.

# virsh nodedev-dumpxml css_0_0_0072
<device>
  <name>css_0_0_0072</name>
  <path>/sys/devices/css0/0.0.0072</path>
  <parent>computer</parent>
  <driver>
    <name>vfio_ccw</name>
  </driver>
  <capability type="css">
    <cssid>0x0</cssid>
    <ssid>0x0</ssid>
    <devno>0x0072</devno>
    <capability type="mdev_types">
      <type id="vfio_ccw-io">
        <name>I/O subchannel (Non-QDIO)</name>
        <deviceAPI>vfio-ccw</deviceAPI>
        <availableInstances>1</availableInstances>
      </type>
    </capability>
  </capability>
</device>