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[PATCH v9 03/12] vhost: allocate SVQ device file descriptors at device s
From: |
Eugenio Pérez |
Subject: |
[PATCH v9 03/12] vhost: allocate SVQ device file descriptors at device start |
Date: |
Thu, 15 Dec 2022 12:31:35 +0100 |
The next patches will start control SVQ if possible. However, we don't
know if that will be possible at qemu boot anymore.
Delay device file descriptors until we know it at device start. This
will avoid to create them 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.c | 31 ++------------------------
hw/virtio/vhost-vdpa.c | 35 ++++++++++++++++++++++++------
2 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/hw/virtio/vhost-shadow-virtqueue.c
b/hw/virtio/vhost-shadow-virtqueue.c
index 264ddc166d..3b05bab44d 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -715,43 +715,18 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
* @iova_tree: Tree to perform descriptors translations
* @ops: SVQ owner callbacks
* @ops_opaque: ops opaque pointer
- *
- * Returns the new virtqueue or NULL.
- *
- * In case of error, reason is reported through error_report.
*/
VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
const VhostShadowVirtqueueOps *ops,
void *ops_opaque)
{
- g_autofree VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
- int r;
-
- r = event_notifier_init(&svq->hdev_kick, 0);
- if (r != 0) {
- error_report("Couldn't create kick event notifier: %s (%d)",
- g_strerror(errno), errno);
- goto err_init_hdev_kick;
- }
-
- r = event_notifier_init(&svq->hdev_call, 0);
- if (r != 0) {
- error_report("Couldn't create call event notifier: %s (%d)",
- g_strerror(errno), errno);
- goto err_init_hdev_call;
- }
+ 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 g_steal_pointer(&svq);
-
-err_init_hdev_call:
- event_notifier_cleanup(&svq->hdev_kick);
-
-err_init_hdev_kick:
- return NULL;
+ return svq;
}
/**
@@ -763,7 +738,5 @@ void vhost_svq_free(gpointer pvq)
{
VhostShadowVirtqueue *vq = pvq;
vhost_svq_stop(vq);
- event_notifier_cleanup(&vq->hdev_kick);
- event_notifier_cleanup(&vq->hdev_call);
g_free(vq);
}
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 7f0ff4df5b..3df2775760 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -428,15 +428,11 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev,
struct vhost_vdpa *v,
shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free);
for (unsigned n = 0; n < hdev->nvqs; ++n) {
- g_autoptr(VhostShadowVirtqueue) svq;
+ VhostShadowVirtqueue *svq;
svq = vhost_svq_new(v->iova_tree, v->shadow_vq_ops,
v->shadow_vq_ops_opaque);
- if (unlikely(!svq)) {
- error_setg(errp, "Cannot create svq %u", n);
- return -1;
- }
- g_ptr_array_add(shadow_vqs, g_steal_pointer(&svq));
+ g_ptr_array_add(shadow_vqs, svq);
}
v->shadow_vqs = g_steal_pointer(&shadow_vqs);
@@ -864,11 +860,23 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev,
const EventNotifier *event_notifier = &svq->hdev_kick;
int r;
+ r = event_notifier_init(&svq->hdev_kick, 0);
+ if (r != 0) {
+ error_setg_errno(errp, -r, "Couldn't create kick event notifier");
+ goto err_init_hdev_kick;
+ }
+
+ r = event_notifier_init(&svq->hdev_call, 0);
+ if (r != 0) {
+ error_setg_errno(errp, -r, "Couldn't create call event notifier");
+ goto err_init_hdev_call;
+ }
+
file.fd = event_notifier_get_fd(event_notifier);
r = vhost_vdpa_set_vring_dev_kick(dev, &file);
if (unlikely(r != 0)) {
error_setg_errno(errp, -r, "Can't set device kick fd");
- return r;
+ goto err_init_set_dev_fd;
}
event_notifier = &svq->hdev_call;
@@ -876,8 +884,18 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev,
r = vhost_vdpa_set_vring_dev_call(dev, &file);
if (unlikely(r != 0)) {
error_setg_errno(errp, -r, "Can't set device call fd");
+ goto err_init_set_dev_fd;
}
+ return 0;
+
+err_init_set_dev_fd:
+ event_notifier_set_handler(&svq->hdev_call, NULL);
+
+err_init_hdev_call:
+ event_notifier_cleanup(&svq->hdev_kick);
+
+err_init_hdev_kick:
return r;
}
@@ -1089,6 +1107,9 @@ static void vhost_vdpa_svqs_stop(struct vhost_dev *dev)
for (unsigned i = 0; i < v->shadow_vqs->len; ++i) {
VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i);
vhost_vdpa_svq_unmap_rings(dev, svq);
+
+ event_notifier_cleanup(&svq->hdev_kick);
+ event_notifier_cleanup(&svq->hdev_call);
}
}
--
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, 2022/12/15
- [PATCH v9 03/12] vhost: allocate SVQ device file descriptors at device start,
Eugenio Pérez <=
- [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
[PATCH v9 09/12] vdpa: add asid parameter to vhost_vdpa_dma_map/unmap, Eugenio Pérez, 2022/12/15