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vfio: Create VFIO implementation of ExternalDmaMapping

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With this implementation of the trait ExternalDmaMapping, we now have
the tool to provide to the virtual IOMMU to trigger the map/unmap on
behalf of the guest.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2019-10-07 10:48:44 -07:00
committed by Samuel Ortiz
parent 3598e603d5
commit 837bcbc6ba
6 changed files with 79 additions and 9 deletions
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15
vmm/src/device_manager.rs
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@@ -36,7 +36,7 @@ use std::ptr::null_mut;
use std::result;
use std::sync::{Arc, Mutex, RwLock};
#[cfg(feature = "pci_support")]
use vfio::{VfioDevice, VfioPciDevice, VfioPciError};
use vfio::{VfioDevice, VfioDmaMapping, VfioPciDevice, VfioPciError};
use vm_allocator::SystemAllocator;
#[cfg(feature = "mmio_support")]
use vm_memory::GuestAddress;
@@ -998,15 +998,18 @@ impl DeviceManager {
// global device ID.
let device_id = pci.next_device_id() << 3;
if device_cfg.iommu {
iommu_attached_list.push(device_id);
}
let vfio_device =
VfioDevice::new(&device_cfg.path, device_fd.clone(), vm_info.memory.clone())
.map_err(DeviceManagerError::VfioCreate)?;
let _vfio_container = vfio_device.get_container();
if device_cfg.iommu {
let _vfio_mapping = VfioDmaMapping::new(
vfio_device.get_container(),
Arc::clone(vm_info.memory),
);
iommu_attached_list.push(device_id);
}
let mut vfio_pci_device = VfioPciDevice::new(vm_info.vm_fd, allocator, vfio_device)
.map_err(DeviceManagerError::VfioPciCreate)?;