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Tsirkin" , Cindy Lu , Jason Wang Subject: [RFC PATCH v9 21/23] vdpa: Add vhost_vdpa_start_control_svq Date: Wed, 6 Jul 2022 20:40:06 +0200 Message-Id: <20220706184008.1649478-22-eperezma@redhat.com> In-Reply-To: <20220706184008.1649478-1-eperezma@redhat.com> References: <20220706184008.1649478-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" As a first step we only enable CVQ first than others. Future patches add state restore. Signed-off-by: Eugenio Pérez --- net/vhost-vdpa.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index e415cc8de5..77d013833f 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -370,6 +370,24 @@ static CVQElement *vhost_vdpa_cvq_alloc_elem(VhostVDPAState *s, return g_steal_pointer(&cvq_elem); } +static int vhost_vdpa_start_control_svq(VhostShadowVirtqueue *svq, + void *opaque) +{ + struct vhost_vring_state state = { + .index = virtio_get_queue_index(svq->vq), + .num = 1, + }; + VhostVDPAState *s = opaque; + struct vhost_dev *dev = s->vhost_vdpa.dev; + struct vhost_vdpa *v = dev->opaque; + int r; + + assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); + + r = ioctl(v->device_fd, VHOST_VDPA_SET_VRING_ENABLE, &state); + return r < 0 ? -errno : r; +} + /** * iov_size with an upper limit. It's assumed UINT64_MAX is an invalid * iov_size. @@ -554,6 +572,7 @@ static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { .avail_handler = vhost_vdpa_net_handle_ctrl_avail, .used_handler = vhost_vdpa_net_handle_ctrl_used, .detach_handler = vhost_vdpa_net_handle_ctrl_detach, + .start = vhost_vdpa_start_control_svq, }; static NetClientState *net_vhost_vdpa_init(NetClientState *peer,