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| author | Jonah Palmer <jonah.palmer@oracle.com> | 2024-03-15 12:55:52 -0400 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-01 14:56:23 -0400 |
| commit | cf39b82860b63589460d8797dd70ae3c1647ccca (patch) | |
| tree | 72812d26bf5f73fb3d94cf6d90ddd2749d6ac097 /include/hw/virtio/virtio.h | |
| parent | 9d5a807c4cb56837f11be9a9250f854fab951290 (diff) | |
| download | qemu-cf39b82860b63589460d8797dd70ae3c1647ccca.zip qemu-cf39b82860b63589460d8797dd70ae3c1647ccca.tar.gz qemu-cf39b82860b63589460d8797dd70ae3c1647ccca.tar.bz2 | |
virtio/virtio-pci: Handle extra notification data
Add support to virtio-pci devices for handling the extra data sent
from the driver to the device when the VIRTIO_F_NOTIFICATION_DATA
transport feature has been negotiated.
The extra data that's passed to the virtio-pci device when this
feature is enabled varies depending on the device's virtqueue
layout.
In a split virtqueue layout, this data includes:
- upper 16 bits: shadow_avail_idx
- lower 16 bits: virtqueue index
In a packed virtqueue layout, this data includes:
- upper 16 bits: 1-bit wrap counter & 15-bit shadow_avail_idx
- lower 16 bits: virtqueue index
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240315165557.26942-2-jonah.palmer@oracle.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/virtio/virtio.h')
| -rw-r--r-- | include/hw/virtio/virtio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 7d5ffdc..1451926 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -307,6 +307,8 @@ int virtio_queue_ready(VirtQueue *vq); int virtio_queue_empty(VirtQueue *vq); +void virtio_queue_set_shadow_avail_idx(VirtQueue *vq, uint16_t idx); + /* Host binding interface. */ uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |