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vfio: Initial PCI support

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This brings the initial PCI support to the VFIO crate.
The VfioPciDevice is the main structure and holds an inner VfioDevice.

VfioPciDevice implements the PCI trait, leaving the IRQ assignments
empty as this will be driven by both the guest and the VFIO PCI device,
not by the VMM.

As we must trap BAR programming from the guest (We don't want to program
the actual device with guest addresses), we use our local PCI
configuration cache to read and write BARs.

Signed-off-by: Zhang, Xiong Y <xiong.y.zhang@intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz
2019-07-15 09:50:55 +02:00
parent 2cec3aad7f
commit db5b4763c2
3 changed files with 364 additions and 1 deletions
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6
vfio/src/lib.rs
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@@ -5,22 +5,26 @@
//#![deny(missing_docs)]
//! Virtual Function I/O (VFIO) API
extern crate byteorder;
extern crate devices;
extern crate kvm_bindings;
extern crate kvm_ioctls;
extern crate log;
extern crate pci;
extern crate vfio_bindings;
extern crate vm_allocator;
extern crate vm_memory;
#[macro_use]
extern crate vmm_sys_util;
mod vfio_device;
mod vfio_ioctls;
mod vfio_pci;
use std::mem::size_of;
pub use vfio_device::{VfioDevice, VfioError};
pub use vfio_pci::VfioPciDevice;
// Returns a `Vec<T>` with a size in bytes at least as large as `size_in_bytes`.
fn vec_with_size_in_bytes<T: Default>(size_in_bytes: usize) -> Vec<T> {