Red Hat Summit Red Hat SummitSuporteConsoleDesenvolvedoresComeçar um testeContato

Este conteúdo não está disponível no idioma selecionado.

14.6. Editing a Guest Virtual Machine's configuration file

Instead of using the dumpxml option (refer to Section 14.5.23, “Creating a Virtual Machine XML Dump (Configuration File)”), guest virtual machines can be edited either while they are running or while they are offline. The virsh edit command provides this functionality. For example, to edit the guest virtual machine named rhel6: 
# virsh edit rhel6
Copy to Clipboard Toggle word wrap
This opens a text editor. The default text editor is the $EDITOR shell parameter (set to vi by default).

14.6.1. Adding Multifunction PCI Devices to KVM Guest Virtual Machines
Copiar o link

This section will demonstrate how to add multi-function PCI devices to KVM guest virtual machines.
  1. Run the virsh edit [guestname] command to edit the XML configuration file for the guest virtual machine.
  2. In the address type tag, add a multifunction='on' entry for function='0x0'.
    This enables the guest virtual machine to use the multifunction PCI devices. 
    <disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source file='/var/lib/libvirt/images/rhel62-1.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/
</disk>
    Copy to Clipboard Toggle word wrap
    For a PCI device with two functions, amend the XML configuration file to include a second device with the same slot number as the first device and a different function number, such as function='0x1'.
    For Example: 
    <disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source file='/var/lib/libvirt/images/rhel62-1.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source file='/var/lib/libvirt/images/rhel62-2.img'/>
<target dev='vdb' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
</disk>
    Copy to Clipboard Toggle word wrap
  3. lspci output from the KVM guest virtual machine shows: 
    $ lspci

00:05.0 SCSI storage controller: Red Hat, Inc Virtio block device
00:05.1 SCSI storage controller: Red Hat, Inc Virtio block device
    Copy to Clipboard Toggle word wrap
Voltar ao topo
Red Hat logoGithubredditYoutubeTwitter

Aprender

Experimente, compre e venda

Comunidades

Sobre a documentação da Red Hat

Ajudamos os usuários da Red Hat a inovar e atingir seus objetivos com nossos produtos e serviços com conteúdo em que podem confiar. Explore nossas atualizações recentes.

Tornando o open source mais inclusivo

A Red Hat está comprometida em substituir a linguagem problemática em nosso código, documentação e propriedades da web. Para mais detalhes veja o Blog da Red Hat.

Sobre a Red Hat

Fornecemos soluções robustas que facilitam o trabalho das empresas em plataformas e ambientes, desde o data center principal até a borda da rede.

Theme

© 2025 Red Hat