Setting up the PCIe support

Configure the PCIe support through the pci= kernel parameter.

PCIe devices are automatically configured during the system boot process. In contrast to most IBM Z® devices, all PCIe devices that are in a configured state are automatically set online. PCIe devices that are in stand-by state are not automatically enabled.

Scanning of PCIe devices is enabled by default. To disable use of PCI devices, set the kernel command line parameter pci=off.

Figure 1. PCI kernel parameter syntax

where:

off: disables automatic scanning of PCIe devices.
on: enables automatic scanning of PCIe devices (default).

Example

The following kernel parameter enables automatic scanning of PCIe devices.

pci=on