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Tsirkin" , kvm@vger.kernel.org Subject: [PATCH for 8.0 v7 00/10] ASID support in vhost-vdpa net Date: Wed, 16 Nov 2022 16:05:46 +0100 Message-Id: <20221116150556.1294049-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 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: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org Control VQ is the way net devices use to send changes to the device state, = like=0D the number of active queues or its mac address.=0D =0D QEMU needs to intercept this queue so it can track these changes and is abl= e to=0D migrate the device. It can do it from 1576dbb5bbc4 ("vdpa: Add x-svq to=0D NetdevVhostVDPAOptions"). However, to enable x-svq implies to shadow all Vi= rtIO=0D device's virtqueues, which will damage performance.=0D =0D This series adds address space isolation, so the device and the guest=0D communicate directly with them (passthrough) and CVQ communication is split= in=0D two: The guest communicates with QEMU and QEMU forwards the commands to the= =0D device.=0D =0D This patch add new features so is targeted for qemu 8.0.=0D =0D Comments are welcome. Thanks!=0D =0D v7:=0D - Never ask for number of address spaces, just react if isolation is not=0D possible.=0D - Return ASID ioctl errors instead of masking them as if the device has=0D no asid.=0D - Rename listener_shadow_vq to shadow_data=0D - Move comment on zero initailization of vhost_vdpa_dma_map above the=0D functions.=0D - Add VHOST_VDPA_GUEST_PA_ASID macro.=0D =0D v6:=0D - Do not allocate SVQ resources like file descriptors if SVQ cannot be used= .=0D - Disable shadow CVQ if the device does not support it because of net=0D features.=0D =0D v5:=0D - Move vring state in vhost_vdpa_get_vring_group instead of using a=0D parameter.=0D - Rename VHOST_VDPA_NET_CVQ_PASSTHROUGH to VHOST_VDPA_NET_DATA_ASID=0D =0D v4:=0D - Rebased on last CVQ start series, that allocated CVQ cmd bufs at load=0D - Squash vhost_vdpa_cvq_group_is_independent.=0D - Do not check for cvq index on vhost_vdpa_net_prepare, we only have one=0D that callback registered in that NetClientInfo.=0D - Add comment specifying behavior if device does not support _F_ASID=0D - Update headers to a later Linux commit to not to remove SETUP_RNG_SEED=0D =0D v3:=0D - Do not return an error but just print a warning if vdpa device initializa= tion=0D returns failure while getting AS num of VQ groups=0D - Delete extra newline=0D =0D v2:=0D - Much as commented on series [1], handle vhost_net backend through=0D NetClientInfo callbacks instead of directly.=0D - Fix not freeing SVQ properly when device does not support CVQ=0D - Add BIT_ULL missed checking device's backend feature for _F_ASID.=0D =0D Eugenio P=C3=A9rez (10):=0D vdpa: Use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop=0D vhost: set SVQ device call handler at SVQ start=0D vhost: Allocate SVQ device file descriptors at device start=0D vdpa: add vhost_vdpa_net_valid_svq_features=0D vdpa: move SVQ vring features check to net/=0D vdpa: Allocate SVQ unconditionally=0D vdpa: Add asid parameter to vhost_vdpa_dma_map/unmap=0D vdpa: Store x-svq parameter in VhostVDPAState=0D vdpa: Add shadow_data to vhost_vdpa=0D vdpa: Always start CVQ in SVQ mode if possible=0D =0D include/hw/virtio/vhost-vdpa.h | 16 ++-=0D hw/virtio/vhost-shadow-virtqueue.c | 35 +------=0D hw/virtio/vhost-vdpa.c | 121 ++++++++++++-----------=0D net/vhost-vdpa.c | 152 ++++++++++++++++++++++++++---=0D hw/virtio/trace-events | 4 +-=0D 5 files changed, 217 insertions(+), 111 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D