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172 lines
5.8 KiB
172 lines
5.8 KiB
From bffccbd59a2e2c641810cd7362c7b5ecf5989ed8 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Thu, 15 Dec 2022 12:31:35 +0100
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Subject: [PATCH 03/14] vhost: allocate SVQ device file descriptors at device
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start
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 136: vDPA ASID support in Qemu
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RH-Bugzilla: 2104412
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [3/13] bab2d43f0fc0d13a4917e706244b37e1a431b082 (eperezmartin/qemu-kvm)
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The next patches will start control SVQ if possible. However, we don't
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know if that will be possible at qemu boot anymore.
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Delay device file descriptors until we know it at device start. This
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will avoid to create them if the device does not support SVQ.
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Message-Id: <20221215113144.322011-4-eperezma@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 3cfb4d069cd2977b707fb519c455d7d416e1f4b0)
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---
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hw/virtio/vhost-shadow-virtqueue.c | 31 ++------------------------
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hw/virtio/vhost-vdpa.c | 35 ++++++++++++++++++++++++------
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2 files changed, 30 insertions(+), 36 deletions(-)
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diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
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index 264ddc166d..3b05bab44d 100644
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--- a/hw/virtio/vhost-shadow-virtqueue.c
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+++ b/hw/virtio/vhost-shadow-virtqueue.c
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@@ -715,43 +715,18 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
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* @iova_tree: Tree to perform descriptors translations
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* @ops: SVQ owner callbacks
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* @ops_opaque: ops opaque pointer
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- *
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- * Returns the new virtqueue or NULL.
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- *
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- * In case of error, reason is reported through error_report.
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*/
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VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
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const VhostShadowVirtqueueOps *ops,
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void *ops_opaque)
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{
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- g_autofree VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
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- int r;
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-
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- r = event_notifier_init(&svq->hdev_kick, 0);
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- if (r != 0) {
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- error_report("Couldn't create kick event notifier: %s (%d)",
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- g_strerror(errno), errno);
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- goto err_init_hdev_kick;
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- }
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-
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- r = event_notifier_init(&svq->hdev_call, 0);
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- if (r != 0) {
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- error_report("Couldn't create call event notifier: %s (%d)",
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- g_strerror(errno), errno);
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- goto err_init_hdev_call;
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- }
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+ VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
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event_notifier_init_fd(&svq->svq_kick, VHOST_FILE_UNBIND);
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svq->iova_tree = iova_tree;
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svq->ops = ops;
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svq->ops_opaque = ops_opaque;
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- return g_steal_pointer(&svq);
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-
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-err_init_hdev_call:
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- event_notifier_cleanup(&svq->hdev_kick);
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-
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-err_init_hdev_kick:
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- return NULL;
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+ return svq;
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}
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/**
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@@ -763,7 +738,5 @@ void vhost_svq_free(gpointer pvq)
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{
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VhostShadowVirtqueue *vq = pvq;
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vhost_svq_stop(vq);
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- event_notifier_cleanup(&vq->hdev_kick);
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- event_notifier_cleanup(&vq->hdev_call);
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g_free(vq);
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}
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index 44e6a9b7b3..530d2ca362 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -428,15 +428,11 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v,
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shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free);
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for (unsigned n = 0; n < hdev->nvqs; ++n) {
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- g_autoptr(VhostShadowVirtqueue) svq;
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+ VhostShadowVirtqueue *svq;
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svq = vhost_svq_new(v->iova_tree, v->shadow_vq_ops,
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v->shadow_vq_ops_opaque);
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- if (unlikely(!svq)) {
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- error_setg(errp, "Cannot create svq %u", n);
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- return -1;
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- }
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- g_ptr_array_add(shadow_vqs, g_steal_pointer(&svq));
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+ g_ptr_array_add(shadow_vqs, svq);
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}
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v->shadow_vqs = g_steal_pointer(&shadow_vqs);
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@@ -871,11 +867,23 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev,
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const EventNotifier *event_notifier = &svq->hdev_kick;
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int r;
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+ r = event_notifier_init(&svq->hdev_kick, 0);
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+ if (r != 0) {
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+ error_setg_errno(errp, -r, "Couldn't create kick event notifier");
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+ goto err_init_hdev_kick;
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+ }
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+
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+ r = event_notifier_init(&svq->hdev_call, 0);
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+ if (r != 0) {
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+ error_setg_errno(errp, -r, "Couldn't create call event notifier");
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+ goto err_init_hdev_call;
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+ }
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+
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file.fd = event_notifier_get_fd(event_notifier);
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r = vhost_vdpa_set_vring_dev_kick(dev, &file);
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if (unlikely(r != 0)) {
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error_setg_errno(errp, -r, "Can't set device kick fd");
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- return r;
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+ goto err_init_set_dev_fd;
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}
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event_notifier = &svq->hdev_call;
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@@ -883,8 +891,18 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev,
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r = vhost_vdpa_set_vring_dev_call(dev, &file);
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if (unlikely(r != 0)) {
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error_setg_errno(errp, -r, "Can't set device call fd");
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+ goto err_init_set_dev_fd;
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}
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+ return 0;
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+
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+err_init_set_dev_fd:
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+ event_notifier_set_handler(&svq->hdev_call, NULL);
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+
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+err_init_hdev_call:
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+ event_notifier_cleanup(&svq->hdev_kick);
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+
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+err_init_hdev_kick:
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return r;
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}
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@@ -1096,6 +1114,9 @@ static void vhost_vdpa_svqs_stop(struct vhost_dev *dev)
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for (unsigned i = 0; i < v->shadow_vqs->len; ++i) {
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VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i);
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vhost_vdpa_svq_unmap_rings(dev, svq);
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+
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+ event_notifier_cleanup(&svq->hdev_kick);
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+ event_notifier_cleanup(&svq->hdev_call);
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}
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}
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--
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2.31.1
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