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device_manager: Simplify the passthrough internal API

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We store the device passthrough handler, so we should use it through our
internal API and only carry the passed through device configuration.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2020-07-21 16:23:39 +02:00
parent f57d970451
commit be51ea250d
1 changed files with 29 additions and 32 deletions
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53
vmm/src/device_manager.rs
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@ -2392,11 +2392,10 @@ impl DeviceManager {
&mut self, &mut self,
pci: &mut PciBus, pci: &mut PciBus,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>, interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
device: &Arc<dyn hypervisor::Device>,
device_cfg: &mut DeviceConfig, device_cfg: &mut DeviceConfig,
) -> DeviceManagerResult<(u32, String)> { ) -> DeviceManagerResult<(u32, String)> {
#[cfg(feature = "kvm")] #[cfg(feature = "kvm")]
return self.add_vfio_device(pci, interrupt_manager, device, device_cfg); return self.add_vfio_device(pci, interrupt_manager, device_cfg);
#[cfg(not(feature = "kvm"))] #[cfg(not(feature = "kvm"))]
Err(DeviceManagerError::NoDevicePassthroughSupport) Err(DeviceManagerError::NoDevicePassthroughSupport)
@ -2407,9 +2406,13 @@ impl DeviceManager {
&mut self, &mut self,
pci: &mut PciBus, pci: &mut PciBus,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>, interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
device: &Arc<dyn hypervisor::Device>,
device_cfg: &mut DeviceConfig, device_cfg: &mut DeviceConfig,
) -> DeviceManagerResult<(u32, String)> { ) -> DeviceManagerResult<(u32, String)> {
let passthrough_device = self
.passthrough_device
.as_ref()
.ok_or(DeviceManagerError::NoDevicePassthroughSupport)?;
// We need to shift the device id since the 3 first bits // We need to shift the device id since the 3 first bits
// are dedicated to the PCI function, and we know we don't // are dedicated to the PCI function, and we know we don't
// do multifunction. Also, because we only support one PCI // do multifunction. Also, because we only support one PCI
@ -2423,7 +2426,7 @@ impl DeviceManager {
let memory = self.memory_manager.lock().unwrap().guest_memory(); let memory = self.memory_manager.lock().unwrap().guest_memory();
let vfio_container = Arc::new( let vfio_container = Arc::new(
VfioContainer::new(Arc::new(unsafe { VfioContainer::new(Arc::new(unsafe {
DeviceFd::from_raw_fd(device.as_raw_fd()) DeviceFd::from_raw_fd(passthrough_device.as_raw_fd())
})) }))
.map_err(DeviceManagerError::VfioCreate)?, .map_err(DeviceManagerError::VfioCreate)?,
); );
@ -2515,17 +2518,19 @@ impl DeviceManager {
let mut devices = self.config.lock().unwrap().devices.clone(); let mut devices = self.config.lock().unwrap().devices.clone();
if let Some(device_list_cfg) = &mut devices { if let Some(device_list_cfg) = &mut devices {
// Create the passthrough device handle if self.passthrough_device.is_none() {
let device = self // Create the passthrough device.
.address_manager self.passthrough_device = Some(
self.address_manager
.vm .vm
.create_passthrough_device() .create_passthrough_device()
.map_err(|e| DeviceManagerError::CreatePassthroughDevice(e.into()))?; .map_err(|e| DeviceManagerError::CreatePassthroughDevice(e.into()))?,
self.passthrough_device = Some(Arc::clone(&device)); );
}
for device_cfg in device_list_cfg.iter_mut() { for device_cfg in device_list_cfg.iter_mut() {
let (device_id, _) = let (device_id, _) =
self.add_passthrough_device(pci, interrupt_manager, &device, device_cfg)?; self.add_passthrough_device(pci, interrupt_manager, device_cfg)?;
if device_cfg.iommu && self.iommu_device.is_some() { if device_cfg.iommu && self.iommu_device.is_some() {
iommu_attached_device_ids.push(device_id); iommu_attached_device_ids.push(device_id);
} }
@ -2940,27 +2945,19 @@ impl DeviceManager {
let interrupt_manager = Arc::clone(&self.msi_interrupt_manager); let interrupt_manager = Arc::clone(&self.msi_interrupt_manager);
let device = if let Some(device) = &self.passthrough_device { if self.passthrough_device.is_none() {
Arc::clone(&device) // If the passthrough device has not been created yet, it is created
} else { // here and stored in the DeviceManager structure for future needs.
// If the passthrough device file descriptor has not been created yet, self.passthrough_device = Some(
// it is created here and stored in the DeviceManager structure for self.address_manager
// future needs.
let device = self
.address_manager
.vm .vm
.create_passthrough_device() .create_passthrough_device()
.map_err(|e| DeviceManagerError::CreatePassthroughDevice(e.into()))?; .map_err(|e| DeviceManagerError::CreatePassthroughDevice(e.into()))?,
self.passthrough_device = Some(Arc::clone(&device)); );
device }
};
let (device_id, device_name) = self.add_passthrough_device( let (device_id, device_name) =
&mut pci.lock().unwrap(), self.add_passthrough_device(&mut pci.lock().unwrap(), &interrupt_manager, device_cfg)?;
&interrupt_manager,
&device,
device_cfg,
)?;
// Update the PCIU bitmap // Update the PCIU bitmap
self.pci_devices_up |= 1 << (device_id >> 3); self.pci_devices_up |= 1 << (device_id >> 3);