PCI passthrough

PCI passthrough is used to pass through PCI devices on the host to a virtual machine. This is primarily used to directly pass network interfaces on the host to a virtual machine for increased performance.

To enable PCI passthrough, you have to use the following steps:

1. Enable Intel VT-d or AMD IOMMU in the BIOS and kernel:

   # vi /etc/sysconfig/grub
   

2. Modify GRUB_CMDLINE_LINUX= to append intel_iommu=on or amd_iommu=on:

   

3. Rebuild the grub2 configuration file as follows and then reboot the hypervisor:

   # grub2-mkconfig -o /boot/grub2/grub.cfg

4. Navigate to Hardware | PCI Host Device and select the PCI device to pass through: