Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

23.3. SMBIOS System Information

Some hypervisors allow control over what system information is presented to the guest virtual machine (for example, SMBIOS fields can be populated by a hypervisor and inspected using the dmidecode command in the guest virtual machine). The optional sysinfo element covers all such categories of information.

  ...
  <os>
    <smbios mode='sysinfo'/>
    ...
  </os>
  <sysinfo type='smbios'>
    <bios>
      <entry name='vendor'>LENOVO</entry>
    </bios>
    <system>
      <entry name='manufacturer'>Fedora</entry>
      <entry name='vendor'>Virt-Manager</entry>
    </system>
  </sysinfo>
  ...

Figure 23.5. SMBIOS system information

The <sysinfo> element has a mandatory attribute type that determines the layout of sub-elements, and may be defined as follows:
  • <smbios> - Sub-elements call out specific SMBIOS values, which will affect the guest virtual machine if used in conjunction with the smbios sub-element of the <os> element. Each sub-element of <sysinfo> names a SMBIOS block, and within those elements can be a list of entry elements that describe a field within the block. The following blocks and entries are recognized:
    • <bios> - This is block 0 of SMBIOS, with entry names drawn from vendor, version, date, and release.
    • <system> - This is block 1 of SMBIOS, with entry names drawn from manufacturer, product, version, serial, uuid, sku, and family. If a uuid entry is provided alongside a top-level uuid element, the two values must match.