PCI VFIO driver for the AMD/Pensando(R) DSC adapter family¶
AMD/Pensando Linux VFIO PCI Device Driver Copyright(c) 2023 Advanced Micro Devices, Inc.
pds-vfio-pci module is a PCI driver that supports Live Migration
capable Virtual Function (VF) devices in the DSC hardware.
Using the device¶
The pds-vfio-pci device is enabled via multiple configuration steps and
depends on the
pds_core driver to create and enable SR-IOV Virtual
Shown below are the steps to bind the driver to a VF and also to the
associated auxiliary device created by the
pds_core driver. This
example assumes the pds_core and pds-vfio-pci modules are already
#!/bin/bash PF_BUS="0000:60" PF_BDF="0000:60:00.0" VF_BDF="0000:60:00.1" # Prevent non-vfio VF driver from probing the VF device echo 0 > /sys/class/pci_bus/$PF_BUS/device/$PF_BDF/sriov_drivers_autoprobe # Create single VF for Live Migration via pds_core echo 1 > /sys/bus/pci/drivers/pds_core/$PF_BDF/sriov_numvfs # Allow the VF to be bound to the pds-vfio-pci driver echo "pds-vfio-pci" > /sys/class/pci_bus/$PF_BUS/device/$VF_BDF/driver_override # Bind the VF to the pds-vfio-pci driver echo "$VF_BDF" > /sys/bus/pci/drivers/pds-vfio-pci/bind
After performing the steps above, a file in /dev/vfio/<iommu_group> should have been created.
Enabling the driver¶
The driver is enabled via the standard kernel configuration system, using the make command:
The driver is located in the menu structure at:
- -> Device Drivers
- -> VFIO Non-Privileged userspace driver framework
-> VFIO support for PDS PCI devices
For general Linux networking support, please use the netdev mailing list, which is monitored by Pensando personnel:
For more specific support needs, please use the Pensando driver support email: