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[PATCH v9 04/12] vhost: move iova_tree set to vhost_svq_start
From: |
Eugenio Pérez |
Subject: |
[PATCH v9 04/12] vhost: move iova_tree set to vhost_svq_start |
Date: |
Thu, 15 Dec 2022 12:31:36 +0100 |
Since we don't know if we will use SVQ at qemu initialization, let's
allocate iova_tree only if needed. To do so, accept it at SVQ start, not
at initialization.
This will avoid to create it if the device does not support SVQ.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
hw/virtio/vhost-shadow-virtqueue.h | 5 ++---
hw/virtio/vhost-shadow-virtqueue.c | 9 ++++-----
hw/virtio/vhost-vdpa.c | 5 ++---
3 files changed, 8 insertions(+), 11 deletions(-)
diff --git a/hw/virtio/vhost-shadow-virtqueue.h
b/hw/virtio/vhost-shadow-virtqueue.h
index d04c34a589..926a4897b1 100644
--- a/hw/virtio/vhost-shadow-virtqueue.h
+++ b/hw/virtio/vhost-shadow-virtqueue.h
@@ -126,11 +126,10 @@ size_t vhost_svq_driver_area_size(const
VhostShadowVirtqueue *svq);
size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq);
void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
- VirtQueue *vq);
+ VirtQueue *vq, VhostIOVATree *iova_tree);
void vhost_svq_stop(VhostShadowVirtqueue *svq);
-VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
- const VhostShadowVirtqueueOps *ops,
+VhostShadowVirtqueue *vhost_svq_new(const VhostShadowVirtqueueOps *ops,
void *ops_opaque);
void vhost_svq_free(gpointer vq);
diff --git a/hw/virtio/vhost-shadow-virtqueue.c
b/hw/virtio/vhost-shadow-virtqueue.c
index 3b05bab44d..4307296358 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -642,9 +642,10 @@ void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq,
int svq_kick_fd)
* @svq: Shadow Virtqueue
* @vdev: VirtIO device
* @vq: Virtqueue to shadow
+ * @iova_tree: Tree to perform descriptors translations
*/
void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
- VirtQueue *vq)
+ VirtQueue *vq, VhostIOVATree *iova_tree)
{
size_t desc_size, driver_size, device_size;
@@ -655,6 +656,7 @@ void vhost_svq_start(VhostShadowVirtqueue *svq,
VirtIODevice *vdev,
svq->last_used_idx = 0;
svq->vdev = vdev;
svq->vq = vq;
+ svq->iova_tree = iova_tree;
svq->vring.num = virtio_queue_get_num(vdev, virtio_get_queue_index(vq));
driver_size = vhost_svq_driver_area_size(svq);
@@ -712,18 +714,15 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
* Creates vhost shadow virtqueue, and instructs the vhost device to use the
* shadow methods and file descriptors.
*
- * @iova_tree: Tree to perform descriptors translations
* @ops: SVQ owner callbacks
* @ops_opaque: ops opaque pointer
*/
-VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
- const VhostShadowVirtqueueOps *ops,
+VhostShadowVirtqueue *vhost_svq_new(const VhostShadowVirtqueueOps *ops,
void *ops_opaque)
{
VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
event_notifier_init_fd(&svq->svq_kick, VHOST_FILE_UNBIND);
- svq->iova_tree = iova_tree;
svq->ops = ops;
svq->ops_opaque = ops_opaque;
return svq;
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 3df2775760..691bcc811a 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -430,8 +430,7 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev,
struct vhost_vdpa *v,
for (unsigned n = 0; n < hdev->nvqs; ++n) {
VhostShadowVirtqueue *svq;
- svq = vhost_svq_new(v->iova_tree, v->shadow_vq_ops,
- v->shadow_vq_ops_opaque);
+ svq = vhost_svq_new(v->shadow_vq_ops, v->shadow_vq_ops_opaque);
g_ptr_array_add(shadow_vqs, svq);
}
@@ -1063,7 +1062,7 @@ static bool vhost_vdpa_svqs_start(struct vhost_dev *dev)
goto err;
}
- vhost_svq_start(svq, dev->vdev, vq);
+ vhost_svq_start(svq, dev->vdev, vq, v->iova_tree);
ok = vhost_vdpa_svq_map_rings(dev, svq, &addr, &err);
if (unlikely(!ok)) {
goto err_map;
--
2.31.1
- [PATCH v9 00/12] ASID support in vhost-vdpa net, Eugenio Pérez, 2022/12/15
- [PATCH v9 01/12] vdpa: use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop, Eugenio Pérez, 2022/12/15
- [PATCH v9 02/12] vhost: set SVQ device call handler at SVQ start, Eugenio Pérez, 2022/12/15
- [PATCH v9 05/12] vdpa: add vhost_vdpa_net_valid_svq_features, Eugenio Pérez, 2022/12/15
- [PATCH v9 04/12] vhost: move iova_tree set to vhost_svq_start,
Eugenio Pérez <=
- [PATCH v9 03/12] vhost: allocate SVQ device file descriptors at device start, Eugenio Pérez, 2022/12/15
- [PATCH v9 06/12] vdpa: request iova_range only once, Eugenio Pérez, 2022/12/15
[PATCH v9 07/12] vdpa: move SVQ vring features check to net/, Eugenio Pérez, 2022/12/15
[PATCH v9 08/12] vdpa: allocate SVQ array unconditionally, Eugenio Pérez, 2022/12/15
[PATCH v9 11/12] vdpa: add shadow_data to vhost_vdpa, Eugenio Pérez, 2022/12/15
[PATCH v9 10/12] vdpa: store x-svq parameter in VhostVDPAState, Eugenio Pérez, 2022/12/15