[PATCH v2 0/2] rust: virtio: add virtio support

[Daniel Almeida <daniel.almeida@collabora.com>]

This used to be a single patch, but I split it into two with the
addition of struct Scatterlist.

Again a bit new with Rust submissions. I was told by Gary Guo to
rebase on top of rust-next, but it seems *very* behind?

The first patch does not build on its own due to a dead_code warning.
It is hard to not have dead code when one is adding infrastructure to be
used by others at a later opportunity. Let me know if you would like to
see the patches squashed into one to fix this.

As suggested by Bjorn, I added a small virtio-entropy based sample.
It is a very bare-bones clone of virtio-rng.c that only sends a
single request.

Changes from v1:

- Addressed review comments by Miguel and Bjorn.
- Added a scatterlist abstraction
- Added a virtio-rng based sample

Daniel Almeida (2):
  rust: add scatterlist support
  rust: virtio: add virtio support

 rust/bindings/bindings_helper.h |   3 +
 rust/helpers.c                  |  25 +++
 rust/kernel/lib.rs              |   3 +
 rust/kernel/scatterlist.rs      |  40 +++++
 rust/kernel/virtio.rs           | 261 ++++++++++++++++++++++++++++++++
 rust/kernel/virtio/virtqueue.rs | 126 +++++++++++++++
 samples/rust/Kconfig            |  10 ++
 samples/rust/Makefile           |   1 +
 samples/rust/rust_virtio.rs     | 195 ++++++++++++++++++++++++
 9 files changed, 664 insertions(+)
 create mode 100644 rust/kernel/scatterlist.rs
 create mode 100644 rust/kernel/virtio.rs
 create mode 100644 rust/kernel/virtio/virtqueue.rs
 create mode 100644 samples/rust/rust_virtio.rs

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2.40.0