Re: [PATCH 01/31] vdpa: Reorder virtio/vhost-vdpa.c functions

Jason Wang <jasowang@xxxxxxxxxx> · Fri, 28 Jan 2022 13:59:08 +0800

在 2022/1/22 上午4:27, Eugenio Pérez 写道:
vhost_vdpa_set_features and vhost_vdpa_init need to use
vhost_vdpa_get_features in svq mode.

vhost_vdpa_dev_start needs to use almost all _set_ functions:
vhost_vdpa_set_vring_dev_kick, vhost_vdpa_set_vring_dev_call,
vhost_vdpa_set_dev_vring_base and vhost_vdpa_set_dev_vring_num.

No functional change intended.


Is it related (a must) to the SVQ code?

Thanks



Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
---
  hw/virtio/vhost-vdpa.c | 164 ++++++++++++++++++++---------------------
  1 file changed, 82 insertions(+), 82 deletions(-)

diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 04ea43704f..6c10a7f05f 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -342,41 +342,6 @@ static bool vhost_vdpa_one_time_request(struct vhost_dev *dev)
      return v->index != 0;
  }
  
-static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
-{
-    struct vhost_vdpa *v;
-    assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA);
-    trace_vhost_vdpa_init(dev, opaque);
-    int ret;
-
-    /*
-     * Similar to VFIO, we end up pinning all guest memory and have to
-     * disable discarding of RAM.
-     */
-    ret = ram_block_discard_disable(true);
-    if (ret) {
-        error_report("Cannot set discarding of RAM broken");
-        return ret;
-    }
-
-    v = opaque;
-    v->dev = dev;
-    dev->opaque =  opaque ;
-    v->listener = vhost_vdpa_memory_listener;
-    v->msg_type = VHOST_IOTLB_MSG_V2;
-
-    vhost_vdpa_get_iova_range(v);
-
-    if (vhost_vdpa_one_time_request(dev)) {
-        return 0;
-    }
-
-    vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
-                               VIRTIO_CONFIG_S_DRIVER);
-
-    return 0;
-}
-
  static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev,
                                              int queue_index)
  {
@@ -506,24 +471,6 @@ static int vhost_vdpa_set_mem_table(struct vhost_dev *dev,
      return 0;
  }
  
-static int vhost_vdpa_set_features(struct vhost_dev *dev,
-                                   uint64_t features)
-{
-    int ret;
-
-    if (vhost_vdpa_one_time_request(dev)) {
-        return 0;
-    }
-
-    trace_vhost_vdpa_set_features(dev, features);
-    ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features);
-    if (ret) {
-        return ret;
-    }
-
-    return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);
-}
-
  static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev)
  {
      uint64_t features;
@@ -646,35 +593,6 @@ static int vhost_vdpa_get_config(struct vhost_dev *dev, uint8_t *config,
      return ret;
   }
  
-static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started)
-{
-    struct vhost_vdpa *v = dev->opaque;
-    trace_vhost_vdpa_dev_start(dev, started);
-
-    if (started) {
-        vhost_vdpa_host_notifiers_init(dev);
-        vhost_vdpa_set_vring_ready(dev);
-    } else {
-        vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
-    }
-
-    if (dev->vq_index + dev->nvqs != dev->vq_index_end) {
-        return 0;
-    }
-
-    if (started) {
-        memory_listener_register(&v->listener, &address_space_memory);
-        return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
-    } else {
-        vhost_vdpa_reset_device(dev);
-        vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
-                                   VIRTIO_CONFIG_S_DRIVER);
-        memory_listener_unregister(&v->listener);
-
-        return 0;
-    }
-}
-
  static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base,
                                       struct vhost_log *log)
  {
@@ -735,6 +653,35 @@ static int vhost_vdpa_set_vring_call(struct vhost_dev *dev,
      return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file);
  }
  
+static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started)
+{
+    struct vhost_vdpa *v = dev->opaque;
+    trace_vhost_vdpa_dev_start(dev, started);
+
+    if (started) {
+        vhost_vdpa_host_notifiers_init(dev);
+        vhost_vdpa_set_vring_ready(dev);
+    } else {
+        vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
+    }
+
+    if (dev->vq_index + dev->nvqs != dev->vq_index_end) {
+        return 0;
+    }
+
+    if (started) {
+        memory_listener_register(&v->listener, &address_space_memory);
+        return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
+    } else {
+        vhost_vdpa_reset_device(dev);
+        vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
+                                   VIRTIO_CONFIG_S_DRIVER);
+        memory_listener_unregister(&v->listener);
+
+        return 0;
+    }
+}
+
  static int vhost_vdpa_get_features(struct vhost_dev *dev,
                                       uint64_t *features)
  {
@@ -745,6 +692,24 @@ static int vhost_vdpa_get_features(struct vhost_dev *dev,
      return ret;
  }
  
+static int vhost_vdpa_set_features(struct vhost_dev *dev,
+                                   uint64_t features)
+{
+    int ret;
+
+    if (vhost_vdpa_one_time_request(dev)) {
+        return 0;
+    }
+
+    trace_vhost_vdpa_set_features(dev, features);
+    ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features);
+    if (ret) {
+        return ret;
+    }
+
+    return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);
+}
+
  static int vhost_vdpa_set_owner(struct vhost_dev *dev)
  {
      if (vhost_vdpa_one_time_request(dev)) {
@@ -772,6 +737,41 @@ static bool  vhost_vdpa_force_iommu(struct vhost_dev *dev)
      return true;
  }
  
+static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
+{
+    struct vhost_vdpa *v;
+    assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA);
+    trace_vhost_vdpa_init(dev, opaque);
+    int ret;
+
+    /*
+     * Similar to VFIO, we end up pinning all guest memory and have to
+     * disable discarding of RAM.
+     */
+    ret = ram_block_discard_disable(true);
+    if (ret) {
+        error_report("Cannot set discarding of RAM broken");
+        return ret;
+    }
+
+    v = opaque;
+    v->dev = dev;
+    dev->opaque =  opaque ;
+    v->listener = vhost_vdpa_memory_listener;
+    v->msg_type = VHOST_IOTLB_MSG_V2;
+
+    vhost_vdpa_get_iova_range(v);
+
+    if (vhost_vdpa_one_time_request(dev)) {
+        return 0;
+    }
+
+    vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
+                               VIRTIO_CONFIG_S_DRIVER);
+
+    return 0;
+}
+
  const VhostOps vdpa_ops = {
          .backend_type = VHOST_BACKEND_TYPE_VDPA,
          .vhost_backend_init = vhost_vdpa_init,

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