vdpa: move SVQ vring features check to net/

The next patches will start control SVQ if possible. However, we don't
know if that will be possible at qemu boot anymore.

Since the moved checks will be already evaluated at net/ to know if it
is ok to shadow CVQ, move them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-8-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 7f6bfd961cdaaab2537cd746859737e9483b8f3f..dd5258919e8fefeb0977dbca012220ab35333f60 100644 (file)
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -389,29 +389,9 @@ static int vhost_vdpa_get_dev_features(struct vhost_dev *dev,
     return ret;
 }
 
-static int vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v,
-                               Error **errp)
+static void vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v)
 {
     g_autoptr(GPtrArray) shadow_vqs = NULL;
-    uint64_t dev_features, svq_features;
-    int r;
-    bool ok;
-
-    if (!v->shadow_vqs_enabled) {
-        return 0;
-    }
-
-    r = vhost_vdpa_get_dev_features(hdev, &dev_features);
-    if (r != 0) {
-        error_setg_errno(errp, -r, "Can't get vdpa device features");
-        return r;
-    }
-
-    svq_features = dev_features;
-    ok = vhost_svq_valid_features(svq_features, errp);
-    if (unlikely(!ok)) {
-        return -1;
-    }
 
     shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free);
     for (unsigned n = 0; n < hdev->nvqs; ++n) {
@@ -422,7 +402,6 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v,
     }
 
     v->shadow_vqs = g_steal_pointer(&shadow_vqs);
-    return 0;
 }
 
 static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
@@ -447,10 +426,7 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
     dev->opaque =  opaque ;
     v->listener = vhost_vdpa_memory_listener;
     v->msg_type = VHOST_IOTLB_MSG_V2;
-    ret = vhost_vdpa_init_svq(dev, v, errp);
-    if (ret) {
-        goto err;
-    }
+    vhost_vdpa_init_svq(dev, v);
 
     if (!vhost_vdpa_first_dev(dev)) {
         return 0;
@@ -460,10 +436,6 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
                                VIRTIO_CONFIG_S_DRIVER);
 
     return 0;
-
-err:
-    ram_block_discard_disable(false);
-    return ret;
 }
 
 static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev,

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index b6462f019237726a536e711cb49b3305a6f507fd..e829ef1f43410e3fe2c0c288cf3ebf6af0c102c4 100644 (file)
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -118,9 +118,10 @@ static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp)
     if (invalid_dev_features) {
         error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64,
                    invalid_dev_features);
+        return false;
     }
 
-    return !invalid_dev_features;
+    return vhost_svq_valid_features(features, errp);
 }
 
 static int vhost_vdpa_net_check_device_id(struct vhost_net *net)