# VirtIO-drivers-rs

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VirtIO guest drivers in Rust. For **no_std** environment.

## Support status

### Device types

| Device  | Supported |
| ------- | --------- |
| Block   | ✅        |
| Net     | ✅        |
| GPU     | ✅        |
| Input   | ✅        |
| Console | ✅        |
| Socket  | ✅        |
| ...     | ❌        |

### Transports

| Transport   | Supported |                                                   |
| ----------- | --------- | ------------------------------------------------- |
| Legacy MMIO | ✅        | version 1                                         |
| MMIO        | ✅        | version 2                                         |
| PCI         | ✅        | Memory-mapped CAM only, e.g. aarch64 or PCIe ECAM |

### Device-independent features

| Feature flag                 | Supported |                                         |
| ---------------------------- | --------- | --------------------------------------- |
| `VIRTIO_F_INDIRECT_DESC`     | ❌        | Indirect descriptors                    |
| `VIRTIO_F_EVENT_IDX`         | ❌        | `avail_event` and `used_event` fields   |
| `VIRTIO_F_VERSION_1`         | TODO      | VirtIO version 1 compliance             |
| `VIRTIO_F_ACCESS_PLATFORM`   | ❌        | Limited device access to memory         |
| `VIRTIO_F_RING_PACKED`       | ❌        | Packed virtqueue layout                 |
| `VIRTIO_F_IN_ORDER`          | ❌        | Optimisations for in-order buffer usage |
| `VIRTIO_F_ORDER_PLATFORM`    | ❌        | Platform ordering for memory access     |
| `VIRTIO_F_SR_IOV`            | ❌        | Single root I/O virtualization          |
| `VIRTIO_F_NOTIFICATION_DATA` | ❌        | Extra data in device notifications      |

## Examples & Tests

- x86_64 (TODO)

### [aarch64](./examples/aarch64)

```bash
cd examples/aarch64
make qemu
```

### [RISCV](./examples/riscv)

```bash
cd examples/riscv
make qemu
```

You will see device info & GUI Window in qemu.

<img decoding="async" src="https://github.com/rcore-os/virtio-drivers/raw/master/examples/riscv/virtio-test-gpu.png" width="50%">