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device: support vfio cold plug

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Depending on ColdPlug flag, cold or hot plug vfio devices. The VFIO device
won't be hot removed when such flag is false

Signed-off-by: Julio Montes <julio.montes@intel.com>
This commit is contained in:
Julio Montes
2020-06-29 10:00:22 -05:00
parent 3eb694c518
commit 66219d164f
2 changed files with 32 additions and 4 deletions
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27
src/runtime/virtcontainers/device/drivers/vfio.go
View File

@@ -98,10 +98,20 @@ func (device *VFIODevice) Attach(devReceiver api.DeviceReceiver) (retErr error)
}
}
// hotplug a VFIO device is actually hotplugging a group of iommu devices
if err := devReceiver.HotplugAddDevice(device, config.DeviceVFIO); err != nil {
deviceLogger().WithError(err).Error("Failed to add device")
return err
coldPlug := device.DeviceInfo.ColdPlug
deviceLogger().WithField("cold-plug", coldPlug).Info("Attaching VFIO device")
if coldPlug {
if err := devReceiver.AppendDevice(device); err != nil {
deviceLogger().WithError(err).Error("Failed to append device")
return err
}
} else {
// hotplug a VFIO device is actually hotplugging a group of iommu devices
if err := devReceiver.HotplugAddDevice(device, config.DeviceVFIO); err != nil {
deviceLogger().WithError(err).Error("Failed to add device")
return err
}
}
deviceLogger().WithFields(logrus.Fields{
@@ -128,6 +138,15 @@ func (device *VFIODevice) Detach(devReceiver api.DeviceReceiver) (retErr error)
}
}()
if device.GenericDevice.DeviceInfo.ColdPlug {
// nothing to detach, device was cold plugged
deviceLogger().WithFields(logrus.Fields{
"device-group": device.DeviceInfo.HostPath,
"device-type": "vfio-passthrough",
}).Info("Nothing to detach. VFIO device was cold plugged")
return nil
}
// hotplug a VFIO device is actually hotplugging a group of iommu devices
if err := devReceiver.HotplugRemoveDevice(device, config.DeviceVFIO); err != nil {
deviceLogger().WithError(err).Error("Failed to remove device")

9
src/runtime/virtcontainers/sandbox.go
View File

@@ -1713,7 +1713,16 @@ func (s *Sandbox) AppendDevice(device api.Device) error {
switch device.DeviceType() {
case config.VhostUserSCSI, config.VhostUserNet, config.VhostUserBlk, config.VhostUserFS:
return s.hypervisor.addDevice(device.GetDeviceInfo().(*config.VhostUserDeviceAttrs), vhostuserDev)
case config.DeviceVFIO:
vfioDevs := device.GetDeviceInfo().([]*config.VFIODev)
for _, d := range vfioDevs {
return s.hypervisor.addDevice(*d, vfioDev)
}
default:
s.Logger().WithField("device-type", device.DeviceType()).
Warn("Could not append device: unsupported device type")
}
return fmt.Errorf("unsupported device type")
}