[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v4 10/19] vhost: add vhost_svq_push_elem
From: |
Eugenio Pérez |
Subject: |
[PATCH v4 10/19] vhost: add vhost_svq_push_elem |
Date: |
Mon, 18 Jul 2022 12:29:40 +0200 |
This function allows external SVQ users to return guest's available
buffers.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
hw/virtio/vhost-shadow-virtqueue.h | 3 +++
hw/virtio/vhost-shadow-virtqueue.c | 16 ++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/hw/virtio/vhost-shadow-virtqueue.h
b/hw/virtio/vhost-shadow-virtqueue.h
index 5c7e7cbab6..d9fc1f1799 100644
--- a/hw/virtio/vhost-shadow-virtqueue.h
+++ b/hw/virtio/vhost-shadow-virtqueue.h
@@ -84,6 +84,9 @@ typedef struct VhostShadowVirtqueue {
bool vhost_svq_valid_features(uint64_t features, Error **errp);
+void vhost_svq_push_elem(VhostShadowVirtqueue *svq,
+ const VirtQueueElement *elem, uint32_t len);
+
void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd);
void vhost_svq_set_svq_call_fd(VhostShadowVirtqueue *svq, int call_fd);
void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq,
diff --git a/hw/virtio/vhost-shadow-virtqueue.c
b/hw/virtio/vhost-shadow-virtqueue.c
index ae5bd6efa8..b377e125e7 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -427,6 +427,22 @@ static VirtQueueElement
*vhost_svq_get_buf(VhostShadowVirtqueue *svq,
return g_steal_pointer(&svq->desc_state[used_elem.id].elem);
}
+/**
+ * Push an element to SVQ, returning it to the guest.
+ */
+void vhost_svq_push_elem(VhostShadowVirtqueue *svq,
+ const VirtQueueElement *elem, uint32_t len)
+{
+ virtqueue_push(svq->vq, elem, len);
+ if (svq->next_guest_avail_elem) {
+ /*
+ * Avail ring was full when vhost_svq_flush was called, so it's a
+ * good moment to make more descriptors available if possible.
+ */
+ vhost_handle_guest_kick(svq);
+ }
+}
+
static void vhost_svq_flush(VhostShadowVirtqueue *svq,
bool check_for_avail_queue)
{
--
2.31.1
- [PATCH v4 00/19] vdpa net devices Rx filter change notification with Shadow VQ, Eugenio Pérez, 2022/07/18
- [PATCH v4 01/19] vhost: move descriptor translation to vhost_svq_vring_write_descs, Eugenio Pérez, 2022/07/18
- [PATCH v4 03/19] virtio-net: Expose ctrl virtqueue logic, Eugenio Pérez, 2022/07/18
- [PATCH v4 06/19] vhost: Check for queue full at vhost_svq_add, Eugenio Pérez, 2022/07/18
- [PATCH v4 02/19] virtio-net: Expose MAC_TABLE_ENTRIES, Eugenio Pérez, 2022/07/18
- [PATCH v4 04/19] vhost: Reorder vhost_svq_kick, Eugenio Pérez, 2022/07/18
- [PATCH v4 05/19] vhost: Move vhost_svq_kick call to vhost_svq_add, Eugenio Pérez, 2022/07/18
- [PATCH v4 08/19] vhost: Add SVQDescState, Eugenio Pérez, 2022/07/18
- [PATCH v4 11/19] vhost: Expose vhost_svq_add, Eugenio Pérez, 2022/07/18
- [PATCH v4 10/19] vhost: add vhost_svq_push_elem,
Eugenio Pérez <=
- [PATCH v4 07/19] vhost: Decouple vhost_svq_add from VirtQueueElement, Eugenio Pérez, 2022/07/18
- [PATCH v4 14/19] vdpa: Export vhost_vdpa_dma_map and unmap calls, Eugenio Pérez, 2022/07/18
- [PATCH v4 12/19] vhost: add vhost_svq_poll, Eugenio Pérez, 2022/07/18
- [PATCH v4 13/19] vhost: Add svq avail_handler callback, Eugenio Pérez, 2022/07/18
- [PATCH v4 09/19] vhost: Track number of descs in SVQDescState, Eugenio Pérez, 2022/07/18
- [PATCH v4 15/19] vdpa: manual forward CVQ buffers, Eugenio Pérez, 2022/07/18
- [PATCH v4 16/19] vdpa: Buffer CVQ support on shadow virtqueue, Eugenio Pérez, 2022/07/18