[PATCH RFC v2 2/6] rust/helpers: add virtio.c

[Manos Pitsidianakis <manos@pitsidianak.is>]

Some internal kernel virtio API functions are inline macros, so define
their symbols in a helper file.

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>
---
 MAINTAINERS            |  6 ++++++
 rust/helpers/helpers.c |  1 +
 rust/helpers/virtio.c  | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index d1cc0e12fe1f004da89b1aa339116908f642e894..48c9c666d90b5a256ab6fae1f42508b789a0ce50 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -27930,6 +27930,12 @@ F:	include/uapi/linux/virtio_*.h
 F:	net/vmw_vsock/virtio*
 F:	tools/virtio/
 
+VIRTIO CORE API BINDINGS [RUST]
+M:	Manos Pitsidianakis <manos@pitsidianak.is>
+L:	virtualization@lists.linux.dev
+S:	Maintained
+F:	rust/helpers/virtio.c
+
 VIRTIO CRYPTO DRIVER
 M:	Gonglei <arei.gonglei@huawei.com>
 L:	virtualization@lists.linux.dev
diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index a3c42e51f00a0990bea81ebce6e99bb397ce7533..5dc0d2f2ee6bd2ae8e6abfe4baa247c1963967f6 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -61,6 +61,7 @@
 #include "time.c"
 #include "uaccess.c"
 #include "usb.c"
+#include "virtio.c"
 #include "vmalloc.c"
 #include "wait.c"
 #include "workqueue.c"
diff --git a/rust/helpers/virtio.c b/rust/helpers/virtio.c
new file mode 100644
index 0000000000000000000000000000000000000000..92185d7b8bd97b66f7b7b825390fdd1173de313d
--- /dev/null
+++ b/rust/helpers/virtio.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#if IS_ENABLED(CONFIG_VIRTIO)
+#include <linux/virtio_config.h>
+
+__rust_helper bool
+rust_helper_virtio_has_feature(const struct virtio_device *vdev,
+			       unsigned int fbit)
+{
+	return virtio_has_feature(vdev, fbit);
+}
+__rust_helper void rust_helper_virtio_get_features(struct virtio_device *vdev,
+						   u64 *features_out)
+{
+	return virtio_get_features(vdev, features_out);
+}
+
+__rust_helper int rust_helper_virtio_find_vqs(struct virtio_device *vdev,
+					      unsigned int nvqs,
+					      struct virtqueue *vqs[],
+					      struct virtqueue_info vqs_info[],
+					      struct irq_affinity *desc)
+{
+	return virtio_find_vqs(vdev, nvqs, vqs, vqs_info, desc);
+}
+
+__rust_helper void rust_helper_virtio_device_ready(struct virtio_device *dev)
+{
+	return virtio_device_ready(dev);
+}
+
+__rust_helper bool
+rust_helper_virtio_is_little_endian(struct virtio_device *vdev)
+{
+	return virtio_is_little_endian(vdev);
+}
+#endif /* IS_ENABLED(CONFIG_VIRTIO) */

-- 
2.47.3