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vm-virtio: Add virtio-iommu support

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This patch introduces the first implementation of the virtio-iommu
device. This device emulates an IOMMU for the guest, which allows
special use cases like nesting passed through devices, or even using
IOVAs from the guest.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2019-09-17 11:40:14 -07:00
committed by Samuel Ortiz
parent 0acb1e329d
commit f40adff2a1
2 changed files with 856 additions and 0 deletions
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4
vm-virtio/src/lib.rs
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@@ -24,6 +24,7 @@ use std::io;
mod block;
mod console;
mod device;
mod iommu;
pub mod net;
mod pmem;
mod queue;
@@ -36,6 +37,7 @@ pub mod vhost_user;
pub use self::block::*;
pub use self::console::*;
pub use self::device::*;
pub use self::iommu::*;
pub use self::net::*;
pub use self::pmem::*;
pub use self::queue::*;
@@ -68,6 +70,7 @@ enum VirtioDeviceType {
TYPE_GPU = 16,
TYPE_INPUT = 18,
TYPE_VSOCK = 19,
TYPE_IOMMU = 23,
TYPE_FS = 26,
TYPE_PMEM = 27,
TYPE_UNKNOWN = 0xFF,
@@ -84,6 +87,7 @@ impl From<u32> for VirtioDeviceType {
16 => VirtioDeviceType::TYPE_GPU,
18 => VirtioDeviceType::TYPE_INPUT,
19 => VirtioDeviceType::TYPE_VSOCK,
23 => VirtioDeviceType::TYPE_IOMMU,
26 => VirtioDeviceType::TYPE_FS,
27 => VirtioDeviceType::TYPE_PMEM,
_ => VirtioDeviceType::TYPE_UNKNOWN,