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virtio-devices: Map mmio over virtio-iommu

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Add infrastructure to lookup the host address for mmio regions on
external dma mapping requests. This specifically resolves vfio
passthrough for virtio-iommu, allowing for nested virtualization to pass
external devices through.

Fixes #6110

Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
This commit is contained in:
Andrew Carp
2024-03-21 16:09:21 -07:00
committed by Rob Bradford
parent a5e2460d95
commit 045964deee
3 changed files with 93 additions and 17 deletions
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pci/src/lib.rs
+1 -1
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@@ -26,7 +26,7 @@ pub use self::device::{
};
pub use self::msi::{msi_num_enabled_vectors, MsiCap, MsiConfig};
pub use self::msix::{MsixCap, MsixConfig, MsixTableEntry, MSIX_CONFIG_ID, MSIX_TABLE_ENTRY_SIZE};
pub use self::vfio::{VfioDmaMapping, VfioPciDevice, VfioPciError};
pub use self::vfio::{MmioRegion, VfioDmaMapping, VfioPciDevice, VfioPciError};
pub use self::vfio_user::{VfioUserDmaMapping, VfioUserPciDevice, VfioUserPciDeviceError};
use serde::de::Visitor;
use std::fmt::{self, Display};