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| author | Jason Wang | 2021-06-02 05:31:26 +0200 |
|---|---|---|
| committer | Jason Wang | 2021-06-11 04:30:13 +0200 |
| commit | c33f23a419f95da16ab4faaf08be635c89b96ff0 (patch) | |
| tree | 291d3e4843c39af6d0916c3bcad4c9d0cbdc5afe /hw | |
| parent | vhost-vdpa: map virtqueue notification area if possible (diff) | |
| download | qemu-c33f23a419f95da16ab4faaf08be635c89b96ff0.tar.gz qemu-c33f23a419f95da16ab4faaf08be635c89b96ff0.tar.xz qemu-c33f23a419f95da16ab4faaf08be635c89b96ff0.zip | |
vhost-vdpa: don't initialize backend_features
We used to initialize backend_features during vhost_vdpa_init()
regardless whether or not it was supported by vhost. This will lead
the unsupported features like VIRTIO_F_IN_ORDER to be included and set
to the vhost-vdpa during vhost_dev_start. Because the
VIRTIO_F_IN_ORDER is not supported by vhost-vdpa so it won't be
advertised to guest which will break the datapath.
Fix this by not initializing the backend_features, so the
acked_features could be built only from guest features via
vhost_net_ack_features().
Fixes: 108a64818e69b ("vhost-vdpa: introduce vhost-vdpa backend")
Cc: qemu-stable@nongnu.org
Cc: Gautam Dawar <gdawar@xilinx.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio/vhost-vdpa.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 7bcccf10fc..61ba313331 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -268,15 +268,12 @@ static void vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque) { struct vhost_vdpa *v; - uint64_t features; assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); trace_vhost_vdpa_init(dev, opaque); v = opaque; v->dev = dev; dev->opaque = opaque ; - vhost_vdpa_call(dev, VHOST_GET_FEATURES, &features); - dev->backend_features = features; v->listener = vhost_vdpa_memory_listener; v->msg_type = VHOST_IOTLB_MSG_V2; |