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Tsirkin" , Eli Cohen , Stefan Hajnoczi , Stefano Garzarella Subject: [PATCH v3 0/6] NIC vhost-vdpa state restore via Shadow CVQ Date: Fri, 22 Jul 2022 10:56:38 +0200 Message-Id: <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 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 fixes [1] and [2] to be applied to achieve full live=0D migration.=0D =0D Thanks!=0D =0D [1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02984.html= =0D [2] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg03993.html= =0D =0D v3:=0D - Route vhost-vdpa start code through NetClientInfo callback.=0D - Delete extra vhost_net_stop_one() call.=0D =0D v2:=0D - Fix SIGSEGV dereferencing SVQ when not in svq mode=0D =0D v1 from RFC:=0D - Do not reorder DRIVER_OK & enable patches.=0D - Delete leftovers=0D =0D Eugenio P=C3=A9rez (6):=0D vhost: stop transfer elem ownership in vhost_handle_guest_kick=0D vdpa: Extract vhost_vdpa_net_cvq_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 NetClientState->start() callback=0D vdpa: Add virtio-net mac address via CVQ at start=0D vdpa: Delete CVQ migration blocker=0D =0D include/hw/virtio/vhost-vdpa.h | 1 -=0D include/net/net.h | 2 +=0D include/net/vhost-vdpa.h | 1 +=0D hw/net/vhost_net.c | 7 ++=0D hw/virtio/vhost-shadow-virtqueue.c | 10 +-=0D hw/virtio/vhost-vdpa.c | 14 ---=0D net/vhost-vdpa.c | 162 +++++++++++++++++++++--------=0D 7 files changed, 133 insertions(+), 64 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D