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Tsirkin" To: Jason Wang Subject: Re: [PATCH V4 00/10] vhost-vDPA multiqueue Message-ID: <20211019064428-mutt-send-email-mst@kernel.org> References: <20211011042829.4159-1-jasowang@redhat.com> <20211019030236-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@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=-0.049, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cindy Lu , qemu-devel , Gautam Dawar , eperezma , Eli Cohen , Zhu Lingshan Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Oct 19, 2021 at 03:24:36PM +0800, Jason Wang wrote: > On Tue, Oct 19, 2021 at 3:21 PM Michael S. Tsirkin wrote: > > > > On Mon, Oct 11, 2021 at 12:28:19PM +0800, Jason Wang wrote: > > > Hi All: > > > > > > This patch implements the multiqueue support for vhost-vDPA. The most > > > important requirement si the control virtqueue support. The virtio-net > > > and vhost-net core are tweak to support control virtqueue as if what > > > data queue pairs are done: a dedicated vhost_net device which is > > > coupled with the NetClientState is intrdouced so most of the existing > > > vhost codes could be reused with minor changes. This means the control > > > virtqueue will bypass the Qemu. With the control virtqueue, vhost-vDPA > > > are extend to support creating and destroying multiqueue queue pairs > > > plus the control virtqueue. > > > > > > For the future, if we want to support live migration, we can either do > > > shadow cvq on top or introduce new interfaces for reporting device > > > states. > > > > > > I had to defer this due to rework I picked up. > > I pushed an experimental tree - it still has issues but > > if you rebase on top of that I can apply. > > Will do. For the tree, is it > git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git next? > > Thanks > pci > > > > > Tests are done via the vp_vdpa driver in L1 guest. > > > > > > Changes since V3: > > > > > > - fix build with vhost disabled > > > > > > Changes since V2: > > > > > > - rebase to qemu master > > > - use "queue_pairs" instead of "qps" > > > - typo fixes > > > > > > Changes since V1: > > > > > > - start and stop vhost devices when all queues were setup > > > - fix the case when driver doesn't support MQ but device support > > > - correctly set the batching capability to avoid a map/unmap storm > > > - various other tweaks > > > > > > Jason Wang (10): > > > vhost-vdpa: open device fd in net_init_vhost_vdpa() > > > vhost-vdpa: classify one time request > > > vhost-vdpa: prepare for the multiqueue support > > > vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState * > > > net: introduce control client > > > vhost-net: control virtqueue support > > > virtio-net: use "queue_pairs" instead of "queues" when possible > > > vhost: record the last virtqueue index for the virtio device > > > virtio-net: vhost control virtqueue support > > > vhost-vdpa: multiqueue support > > > > > > hw/net/vhost_net-stub.c | 4 +- > > > hw/net/vhost_net.c | 55 ++++++++--- > > > hw/net/virtio-net.c | 165 ++++++++++++++++++--------------- > > > hw/virtio/vhost-vdpa.c | 56 +++++++++-- > > > include/hw/virtio/vhost-vdpa.h | 1 + > > > include/hw/virtio/vhost.h | 2 + > > > include/hw/virtio/virtio-net.h | 5 +- > > > include/net/net.h | 5 + > > > include/net/vhost_net.h | 6 +- > > > net/net.c | 24 ++++- > > > net/vhost-vdpa.c | 127 ++++++++++++++++++++++--- > > > 11 files changed, 330 insertions(+), 120 deletions(-) > > > > > > -- > > > 2.25.1 > >