diff options
| author | Jonah Palmer <jonah.palmer@oracle.com> | 2024-03-15 12:55:54 -0400 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-01 14:56:23 -0400 |
| commit | 54869366be60af2eb52cffaedad73ba1f4247e15 (patch) | |
| tree | daea84a53c7a9a0c2e074a2849814ea248b7356e /hw/virtio | |
| parent | 78378f450a723eed34156259ca2861a0c5ca77cf (diff) | |
| download | qemu-54869366be60af2eb52cffaedad73ba1f4247e15.zip qemu-54869366be60af2eb52cffaedad73ba1f4247e15.tar.gz qemu-54869366be60af2eb52cffaedad73ba1f4247e15.tar.bz2 | |
virtio-mmio: Handle extra notification data
Add support to virtio-mmio 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-mmio device when this feature
is enabled varies depending on the device's virtqueue layout.
The data passed to the virtio-mmio device is in the same format as the
data passed to virtio-pci devices.
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240315165557.26942-4-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/virtio-mmio.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 22f9fbc..320428a 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -248,6 +248,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value, { VirtIOMMIOProxy *proxy = (VirtIOMMIOProxy *)opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + uint16_t vq_idx; trace_virtio_mmio_write_offset(offset, value); @@ -407,8 +408,14 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value, } break; case VIRTIO_MMIO_QUEUE_NOTIFY: - if (value < VIRTIO_QUEUE_MAX) { - virtio_queue_notify(vdev, value); + vq_idx = value; + if (vq_idx < VIRTIO_QUEUE_MAX && virtio_queue_get_num(vdev, vq_idx)) { + if (virtio_vdev_has_feature(vdev, VIRTIO_F_NOTIFICATION_DATA)) { + VirtQueue *vq = virtio_get_queue(vdev, vq_idx); + + virtio_queue_set_shadow_avail_idx(vq, (value >> 16) & 0xFFFF); + } + virtio_queue_notify(vdev, vq_idx); } break; case VIRTIO_MMIO_INTERRUPT_ACK: |