Configuring a PCI passthrough

In Proxmox, it is possible to passthrough PCI devices directly into a VM. In this section, we will see how to configure and verify a PCI passthrough.

How to do it…

The following steps describe how to enable and configure the PCI passthrough in Proxmox:

1. Log in to the Proxmox node through SSH or directly through a console.

2. Open the grub configuration file by using an editor:

   # nano /etc/default/grub
   

3. Make changes to the GRUB_CMDLINE_LINUX_DEFAULT="quiet" line by using these suggestions.

   For Intel CPUs, make the following change:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"

   For AMD CPUs, make the following change:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on"

4. Save the changes and exit the editor.

5. Run the following command to update grub:

   # update-grub
   

6. If you're using an AMD CPU, add the following line in the /etc/modprobe.d/kvm_iommu_map_guest.conf configuration file:

   options kvm allow_unsafe_assigned_interrupt=1

   Tip

   Ensure that the VM is not set to auto start after a...