84 lines
3.0 KiB
Diff
84 lines
3.0 KiB
Diff
From a26eb02b3a49c5d1163685ba5b83b67138c09047 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
|
|
Date: Thu, 21 Jul 2022 15:38:55 +0200
|
|
Subject: [PATCH 17/32] vhost: add vhost_svq_push_elem
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Eugenio Pérez <eperezma@redhat.com>
|
|
RH-MergeRequest: 108: Net Control Virtqueue shadow Support
|
|
RH-Commit: [17/27] d064b40a262f2dfdc9f648d250aa8c8020c40385 (eperezmartin/qemu-kvm)
|
|
RH-Bugzilla: 1939363
|
|
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
|
|
RH-Acked-by: Cindy Lu <lulu@redhat.com>
|
|
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/1939363
|
|
|
|
Upstream Status: git://git.qemu.org/qemu.git
|
|
|
|
commit 432efd144e990b6e040862de25f8f0b6a6eeb03d
|
|
Author: Eugenio Pérez <eperezma@redhat.com>
|
|
Date: Wed Jul 20 08:59:36 2022 +0200
|
|
|
|
vhost: add vhost_svq_push_elem
|
|
|
|
This function allows external SVQ users to return guest's available
|
|
buffers.
|
|
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
|
|
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
|
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
---
|
|
hw/virtio/vhost-shadow-virtqueue.c | 16 ++++++++++++++++
|
|
hw/virtio/vhost-shadow-virtqueue.h | 3 +++
|
|
2 files changed, 19 insertions(+)
|
|
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
|
|
index 4d99075e73..1ce52d5b4a 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.c
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.c
|
|
@@ -428,6 +428,22 @@ 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)
|
|
{
|
|
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,
|
|
--
|
|
2.31.1
|
|
|