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vm-virtio: iommu: Expect an identifier upon device creation

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This identifier is chosen from the DeviceManager so that it will manage
all identifiers across the VM, which will ensure uniqueness.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-04-27 14:51:15 +02:00 committed by Rob Bradford
parent 052eff1ca7
commit 556871570e
2 changed files with 13 additions and 5 deletions
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10
vm-virtio/src/iommu.rs
View File

@ -793,6 +793,7 @@ impl DmaRemapping for IommuMapping {
}
pub struct Iommu {
id: String,
kill_evt: Option<EventFd>,
pause_evt: Option<EventFd>,
avail_features: u64,
@ -808,7 +809,7 @@ pub struct Iommu {
}
impl Iommu {
pub fn new() -> io::Result<(Self, Arc<IommuMapping>)> {
pub fn new(id: String) -> io::Result<(Self, Arc<IommuMapping>)> {
let config = VirtioIommuConfig {
page_size_mask: VIRTIO_IOMMU_PAGE_SIZE_MASK,
probe_size: PROBE_PROP_SIZE,
@ -822,6 +823,7 @@ impl Iommu {
Ok((
Iommu {
id,
kill_evt: None,
pause_evt: None,
avail_features: 1u64 << VIRTIO_F_VERSION_1
@ -1039,6 +1041,10 @@ impl VirtioDevice for Iommu {
}
virtio_pausable!(Iommu);
impl Snapshottable for Iommu {}
impl Snapshottable for Iommu {
fn id(&self) -> String {
self.id.clone()
}
}
impl Transportable for Iommu {}
impl Migratable for Iommu {}

8
vmm/src/device_manager.rs
View File

@ -788,9 +788,11 @@ impl DeviceManager {
Arc::clone(&self.address_manager) as Arc<dyn DeviceRelocation>,
);
let iommu_id = String::from(IOMMU_DEVICE_NAME);
let (iommu_device, iommu_mapping) = if self.config.lock().unwrap().iommu {
let (device, mapping) =
vm_virtio::Iommu::new().map_err(DeviceManagerError::CreateVirtioIommu)?;
let (device, mapping) = vm_virtio::Iommu::new(iommu_id.clone())
.map_err(DeviceManagerError::CreateVirtioIommu)?;
let device = Arc::new(Mutex::new(device));
self.iommu_device = Some(Arc::clone(&device));
(Some(device), Some(mapping))
@ -841,7 +843,7 @@ impl DeviceManager {
&mut pci_bus,
&None,
&interrupt_manager,
Some(String::from(IOMMU_DEVICE_NAME)),
Some(iommu_id),
)?;
}