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main, vmm: add explicit PCI BDF support for Rng device

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This was missing in [0] but is required for proper explicit PCI BDF
management, e.g., when a VM is created via libvirt and each device has
an explicit BDF.

[0] https://github.com/cloud-hypervisor/cloud-hypervisor/pull/7965

On-behalf-of: SAP philipp.schuster@sap.com
Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
This commit is contained in:
Philipp Schuster
2026-05-07 15:53:51 +02:00
committed by Rob Bradford
parent 18bbc71b59
commit bad10f3026
7 changed files with 68 additions and 35 deletions
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20
vmm/src/device_manager.rs
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@@ -3006,16 +3006,24 @@ impl DeviceManager {
fn make_virtio_rng_devices(&mut self) -> DeviceManagerResult<()> {
// Add virtio-rng if required
let rng_config = self.config.lock().unwrap().rng.clone();
let mut rng_config = self.config.lock().unwrap().rng.clone();
if let Some(rng_path) = rng_config.src.to_str() {
info!("Creating virtio-rng device: {rng_config:?}");
let id = String::from(RNG_DEVICE_NAME);
let id = match rng_config.pci_common.id.as_ref() {
Some(id) => id.clone(),
None => rng_config
.pci_common
.id
.insert(RNG_DEVICE_NAME.to_string())
.clone(),
};
let virtio_rng_device = Arc::new(Mutex::new(
virtio_devices::Rng::new(
id.clone(),
rng_path,
self.force_access_platform | rng_config.iommu,
self.force_access_platform | rng_config.pci_common.iommu,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
@@ -3028,11 +3036,7 @@ impl DeviceManager {
self.virtio_devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_rng_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
pci_common: PciDeviceCommonConfig {
id: Some(id.clone()),
iommu: rng_config.iommu,
..Default::default()
},
pci_common: rng_config.pci_common.clone(),
dma_handler: None,
});