diff mbox series

[PULL,11/12] include/hw/virtio: document vhost_get_features

Message ID 20220628044201.217173-12-mst@redhat.com
State New
Headers show
Series [PULL,01/12] virtio-iommu: Fix the partial copy of probe request | expand

Commit Message

Michael S. Tsirkin June 28, 2022, 4:43 a.m. UTC 
From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220524154056.2896913-4-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 include/hw/virtio/vhost.h | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index 1e7cbd9a10..bfc71b7c50 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h
@@ -247,6 +247,17 @@  bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
  */
 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
                           bool mask);
+
+/**
+ * vhost_get_features() - return a sanitised set of feature bits
+ * @hdev: common vhost_dev structure
+ * @feature_bits: pointer to terminated table of feature bits
+ * @features: original feature set
+ *
+ * This returns a set of features bits that is an intersection of what
+ * is supported by the vhost backend (hdev->features), the supported
+ * feature_bits and the requested feature set.
+ */
 uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
                             uint64_t features);
 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,