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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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2a6eb31d5b
Split the generic virtio code (queues and device type) from the VirtioDevice trait, transport and device implementations. This also simplifies the feature handling in vhost_user_backend as the vm-virtio crate is no longer has any features. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
93 lines
2.9 KiB
Rust
93 lines
2.9 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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//
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// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-BSD-3-Clause file.
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//
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// Copyright © 2019 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
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//! Implements virtio queues
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#[macro_use]
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extern crate log;
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#[macro_use]
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extern crate serde_derive;
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use std::fmt;
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pub mod queue;
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pub use queue::*;
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pub type VirtioIommuRemapping =
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Box<dyn Fn(u64) -> std::result::Result<u64, std::io::Error> + Send + Sync>;
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// Types taken from linux/virtio_ids.h
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#[derive(Copy, Clone, Debug)]
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#[allow(dead_code)]
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#[allow(non_camel_case_types)]
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#[repr(C)]
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pub enum VirtioDeviceType {
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TYPE_NET = 1,
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TYPE_BLOCK = 2,
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TYPE_CONSOLE = 3,
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TYPE_RNG = 4,
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TYPE_BALLOON = 5,
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TYPE_9P = 9,
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TYPE_GPU = 16,
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TYPE_INPUT = 18,
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TYPE_VSOCK = 19,
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TYPE_IOMMU = 23,
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TYPE_MEM = 24,
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TYPE_FS = 26,
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TYPE_PMEM = 27,
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TYPE_UNKNOWN = 0xFF,
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}
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impl From<u32> for VirtioDeviceType {
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fn from(t: u32) -> Self {
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match t {
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1 => VirtioDeviceType::TYPE_NET,
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2 => VirtioDeviceType::TYPE_BLOCK,
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3 => VirtioDeviceType::TYPE_CONSOLE,
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4 => VirtioDeviceType::TYPE_RNG,
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5 => VirtioDeviceType::TYPE_BALLOON,
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9 => VirtioDeviceType::TYPE_9P,
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16 => VirtioDeviceType::TYPE_GPU,
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18 => VirtioDeviceType::TYPE_INPUT,
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19 => VirtioDeviceType::TYPE_VSOCK,
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23 => VirtioDeviceType::TYPE_IOMMU,
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24 => VirtioDeviceType::TYPE_MEM,
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26 => VirtioDeviceType::TYPE_FS,
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27 => VirtioDeviceType::TYPE_PMEM,
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_ => VirtioDeviceType::TYPE_UNKNOWN,
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}
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}
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}
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// In order to use the `{}` marker, the trait `fmt::Display` must be implemented
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// manually for the type VirtioDeviceType.
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impl fmt::Display for VirtioDeviceType {
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// This trait requires `fmt` with this exact signature.
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let output = match *self {
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VirtioDeviceType::TYPE_NET => "net",
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VirtioDeviceType::TYPE_BLOCK => "block",
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VirtioDeviceType::TYPE_CONSOLE => "console",
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VirtioDeviceType::TYPE_RNG => "rng",
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VirtioDeviceType::TYPE_BALLOON => "balloon",
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VirtioDeviceType::TYPE_GPU => "gpu",
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VirtioDeviceType::TYPE_9P => "9p",
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VirtioDeviceType::TYPE_INPUT => "input",
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VirtioDeviceType::TYPE_VSOCK => "vsock",
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VirtioDeviceType::TYPE_IOMMU => "iommu",
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VirtioDeviceType::TYPE_MEM => "mem",
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VirtioDeviceType::TYPE_FS => "fs",
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VirtioDeviceType::TYPE_PMEM => "pmem",
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VirtioDeviceType::TYPE_UNKNOWN => "UNKNOWN",
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};
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write!(f, "{}", output)
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}
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}
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