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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1036; envelope-from=yin31149@gmail.com; helo=mail-pj1-x1036.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1685706797433100002 Content-Type: text/plain; charset="utf-8" This patch introduces vhost_vdpa_net_load_offloads() to restore offloads state at device's startup. Signed-off-by: Hawkins Jiawei --- net/vhost-vdpa.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index e907a3c792..1a295af51d 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -678,6 +678,44 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, return *s->status !=3D VIRTIO_NET_OK; } =20 +static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, + const VirtIONet *n) +{ + uint64_t offloads; + ssize_t dev_written; + + if (!virtio_vdev_has_feature(&n->parent_obj, + VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { + return 0; + } + + if (n->curr_guest_offloads =3D=3D virtio_net_supported_guest_offloads(= n)) { + /* + * According to VirtIO standard, "Upon feature negotiation + * corresponding offload gets enabled to preserve + * backward compatibility.". + * + * Therefore, there is no need to send this CVQ command if the + * driver also enables all supported offloads, which aligns with + * the device's defaults. + * + * Note that the device's defaults can mismatch the driver's confi= guration + * only at live migration. + */ + return 0; + } + + offloads =3D cpu_to_le64(n->curr_guest_offloads); + dev_written =3D vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLO= ADS, + VIRTIO_NET_CTRL_GUEST_OFFLOADS_S= ET, + &offloads, sizeof(offloads)); + if (unlikely(dev_written < 0)) { + return dev_written; + } + + return *s->status !=3D VIRTIO_NET_OK; +} + static int vhost_vdpa_net_load(NetClientState *nc) { VhostVDPAState *s =3D DO_UPCAST(VhostVDPAState, nc, nc); @@ -700,6 +738,10 @@ static int vhost_vdpa_net_load(NetClientState *nc) if (unlikely(r)) { return r; } + r =3D vhost_vdpa_net_load_offloads(s, n); + if (unlikely(r)) { + return r; + } =20 return 0; } --=20 2.25.1