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| author | Wafer <wafer@jaguarmicro.com> | 2024-05-10 15:27:53 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-01 14:56:23 -0400 |
| commit | 33abfea239592a706e98269b01c0096249612ea4 (patch) | |
| tree | 922b5f1aaff116b9f1e39dda54f11dc343e2507e /hw/display/vhost-user-gpu.c | |
| parent | a0eebd790ca4f90fc1e3662cb38542ccc21963bf (diff) | |
| download | focaccia-qemu-33abfea239592a706e98269b01c0096249612ea4.tar.gz focaccia-qemu-33abfea239592a706e98269b01c0096249612ea4.zip | |
hw/virtio: Fix obtain the buffer id from the last descriptor
The virtio-1.3 specification
<https://docs.oasis-open.org/virtio/virtio/v1.3/virtio-v1.3.html> writes:
2.8.6 Next Flag: Descriptor Chaining
Buffer ID is included in the last descriptor in the list.
If the feature (_F_INDIRECT_DESC) has been negotiated, install only
one descriptor in the virtqueue.
Therefor the buffer id should be obtained from the first descriptor.
In descriptor chaining scenarios, the buffer id should be obtained
from the last descriptor.
Fixes: 86044b24e8 ("virtio: basic packed virtqueue support")
Signed-off-by: Wafer <wafer@jaguarmicro.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20240510072753.26158-2-wafer@jaguarmicro.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/display/vhost-user-gpu.c')
0 files changed, 0 insertions, 0 deletions