vfio: Add NvSwitches to the list of devices

In when using DGX/HGX systems with virtualization
we need to bind the NvSwitchess to vfio-pci as well.

This enables us to use two virtualization modes

1. Full passthrough
2. ServiceVM

We're explicitly not considering mode 3 with vGPUs.

Signed-off-by: Zvonko Kaiser <zkaiser@nvidia.com>

Author: zvonkok

cmd/vfio-manage/bind.go

@@ -115,6 +115,12 @@ func (m bindCommand) bindAll() error {
 		return fmt.Errorf("failed to get NVIDIA GPUs: %w", err)
 	}
 
+	nvswitches, err := m.nvpciLib.GetNVSwitches()
+	if err != nil {
+		return fmt.Errorf("failed to get NVIDIA NVSwitches: %w", err)
+	}
+	devices = append(devices, nvswitches...)
+
 	for _, dev := range devices {
 		m.logger.Infof("Binding device %s", dev.Address)
 		// (cdesiniotis) ideally this should be replaced by a call to nvdev.BindToVFIODriver()