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Tsirkin" , Eli Cohen , Stefan Hajnoczi , Stefano Garzarella Subject: [PATCH v3 5/6] vdpa: Add virtio-net mac address via CVQ at start Date: Fri, 22 Jul 2022 10:56:43 +0200 Message-Id: <20220722085644.3376708-6-eperezma@redhat.com> In-Reply-To: <20220722085644.3376708-1-eperezma@redhat.com> References: <20220722085644.3376708-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 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_LOW=-0.7, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1658481449010100001 This is needed so the destination vdpa device see the same state a the guest set in the source. Signed-off-by: Eugenio P=C3=A9rez --- include/net/vhost-vdpa.h | 1 + net/vhost-vdpa.c | 57 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+) diff --git a/include/net/vhost-vdpa.h b/include/net/vhost-vdpa.h index b81f9a6f2a..38d65e845d 100644 --- a/include/net/vhost-vdpa.h +++ b/include/net/vhost-vdpa.h @@ -15,6 +15,7 @@ #define TYPE_VHOST_VDPA "vhost-vdpa" =20 struct vhost_net *vhost_vdpa_get_vhost_net(NetClientState *nc); +int vhost_vdpa_start(NetClientState *nc); =20 extern const int vdpa_feature_bits[]; =20 diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index bbe1830824..84e90f067a 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -375,6 +375,63 @@ static virtio_net_ctrl_ack vhost_vdpa_net_cvq_add(Vhos= tShadowVirtqueue *svq, return VIRTIO_NET_OK; } =20 +int vhost_vdpa_start(NetClientState *nc) +{ + VhostVDPAState *s =3D DO_UPCAST(VhostVDPAState, nc, nc); + struct vhost_vdpa *v =3D &s->vhost_vdpa; + VirtIONet *n =3D VIRTIO_NET(v->dev->vdev); + uint64_t features =3D v->dev->vdev->host_features; + VhostShadowVirtqueue *svq; + + if (!v->shadow_vqs_enabled) { + return 0; + } + + if (v->dev->vq_index + v->dev->nvqs !=3D v->dev->vq_index_end) { + /* Only interested in CVQ */ + return 0; + } + + assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); + + svq =3D g_ptr_array_index(v->shadow_vqs, 0); + if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { + const struct virtio_net_ctrl_hdr ctrl =3D { + .class =3D VIRTIO_NET_CTRL_MAC, + .cmd =3D VIRTIO_NET_CTRL_MAC_ADDR_SET, + }; + uint8_t mac[6]; + const struct iovec out[] =3D { + { + .iov_base =3D (void *)&ctrl, + .iov_len =3D sizeof(ctrl), + },{ + .iov_base =3D mac, + .iov_len =3D sizeof(mac), + }, + }; + struct iovec dev_buffers[2] =3D { + { .iov_base =3D s->cvq_cmd_out_buffer }, + { .iov_base =3D s->cvq_cmd_in_buffer }, + }; + bool ok; + virtio_net_ctrl_ack state; + + ok =3D vhost_vdpa_net_cvq_map_sg(s, out, ARRAY_SIZE(out), dev_buff= ers); + if (unlikely(!ok)) { + return -1; + } + + memcpy(mac, n->mac, sizeof(mac)); + state =3D vhost_vdpa_net_cvq_add(svq, dev_buffers); + vhost_vdpa_cvq_unmap_buf(v, dev_buffers[0].iov_base); + vhost_vdpa_cvq_unmap_buf(v, dev_buffers[1].iov_base); + return state =3D=3D VIRTIO_NET_OK ? 0 : 1; + } + + return 0; +} + /** * Do not forward commands not supported by SVQ. Otherwise, the device cou= ld * accept it and qemu would not know how to update the device model. --=20 2.31.1