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Tsirkin" , Cindy Lu , Cornelia Huck , Liuxiangdong , Jason Wang , Stefan Hajnoczi , "Gonglei (Arei)" , Gautam Dawar Subject: [RFC PATCH 00/12] NIC vhost-vdpa state restore via Shadow CVQ Date: Sat, 16 Jul 2022 13:33:55 +0200 Message-Id: <20220716113407.2730331-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" CVQ of net vhost-vdpa devices can be intercepted since the work of [1]. The= =0D virtio-net device model is updated. The migration was blocked because altho= ugh=0D the state can be megrated between VMM it was not possible to restore on the= =0D destination NIC.=0D =0D This series add support for SVQ to inject external messages without the gue= st's=0D knowledge, so before the guest is resumed all the guest visible state is=0D restored. It is done using standard CVQ messages, so the vhost-vdpa device = does=0D not need to learn how to restore it: As long as they have the feature, they= =0D know how to handle it.=0D =0D This series needs SVQ CVQ support [1] and fixes [2] to be applied.=0D =0D Thanks!=0D =0D [1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02808.html= =0D [2] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02726.html= =0D =0D Eugenio P=C3=A9rez (12):=0D vhost: Get vring base from vq, not svq=0D vhost: Move SVQ queue rewind to the destination=0D vdpa: Small rename of error labels=0D vdpa: delay set_vring_ready after DRIVER_OK=0D vhost: stop transfer elem ownership in vhost_handle_guest_kick=0D vhost: Use opaque data in SVQDescState=0D vhost: Add VhostVDPAStartOp operation=0D vdpa: Add vhost_vdpa_start_control_svq=0D vdpa: Extract vhost_vdpa_net_svq_add from=0D vhost_vdpa_net_handle_ctrl_avail=0D vdpa: Make vhost_vdpa_net_cvq_map_elem accept any out sg=0D vdpa: Add virtio-net mac address via CVQ at start=0D vdpa: Delete CVQ migration blocker=0D =0D hw/virtio/vhost-shadow-virtqueue.h | 7 +-=0D include/hw/virtio/vhost-vdpa.h | 6 +-=0D hw/virtio/vhost-shadow-virtqueue.c | 30 ++---=0D hw/virtio/vhost-vdpa.c | 70 ++++++-----=0D net/vhost-vdpa.c | 184 ++++++++++++++++++++---------=0D 5 files changed, 193 insertions(+), 104 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D