kvm-bindings

Rust FFI bindings to KVM, generated using bindgen. It currently has support for the following target architectures:

• x86_64
• arm64
• riscv64

The bindings exported by this crate are statically generated using header files associated with a specific kernel version, and are not automatically synced with the kernel version running on a particular host. The user must ensure that specific structures, members, or constants are supported and valid for the kernel version they are using. For example, the immediate_exit field from the kvm_run structure is only meaningful if the KVM_CAP_IMMEDIATE_EXIT capability is available. Using invalid fields or features may lead to undefined behaviour.

Usage

First, add the following to your Cargo.toml:

kvm-bindings = "0.3"

Next, add this to your crate root:

extern crate kvm_bindings;

This crate also offers safe wrappers over FAM structs - FFI structs that have a Flexible Array Member in their definition. These safe wrappers can be used if the fam-wrappers feature is enabled for this crate. Example:

kvm-bindings = { version = "0.3", features = ["fam-wrappers"]}

Dependencies

The crate has an optional dependency to vmm-sys-util when enabling the fam-wrappers feature.

It also has an optional dependency on serde when enabling the serde feature, to allow serialization of bindings. Serialization of bindings happens as opaque binary blobs via zerocopy. Due to the kernel's ABI compatibility, this means that bindings serialized in version x of kvm-bindings can be deserialized in version y of the crate, even if the bindings have had been regenerated in the meantime.

Regenerating Bindings

Please see CONTRIBUTING.md for details on how to generate the bindings or add support for new architectures.