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Fri, 8 May 2020 16:36:19 +0000 (UTC) From: Cindy Lu To: mst@redhat.com, armbru@redhat.com, eblake@redhat.com, cohuck@redhat.com, jasowang@redhat.com Subject: [RFC v2 9/9] vhost: introduce vhost_set_vring_ready method Date: Sat, 9 May 2020 00:32:18 +0800 Message-Id: <20200508163218.22592-10-lulu@redhat.com> In-Reply-To: <20200508163218.22592-1-lulu@redhat.com> References: <20200508163218.22592-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=207.211.31.120; envelope-from=lulu@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/08 11:31:41 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_PASS=-0.001 autolearn=_AUTOLEARN 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: mhabets@solarflare.com, qemu-devel@nongnu.org, rob.miller@broadcom.com, saugatm@xilinx.com, lulu@redhat.com, hanand@xilinx.com, hch@infradead.org, eperezma@redhat.com, jgg@mellanox.com, shahafs@mellanox.com, kevin.tian@intel.com, parav@mellanox.com, vmireyno@marvell.com, cunming.liang@intel.com, gdawar@xilinx.com, jiri@mellanox.com, xiao.w.wang@intel.com, stefanha@redhat.com, zhihong.wang@intel.com, aadam@redhat.com, rdunlap@infradead.org, maxime.coquelin@redhat.com, lingshan.zhu@intel.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Jason Wang Vhost-vdpa introduces VHOST_VDPA_SET_VRING_ENABLE which complies the semantic of queue_enable defined in virtio spec. This method can be used for preventing device from executing request for a specific virtqueue. This patch introduces the vhost_ops for this. Note that, we've already had vhost_set_vring_enable which has different semantic which allows to enable or disable a specific virtqueue for some kinds of vhost backends. E.g vhost-user use this to changes the number of active queue pairs. Signed-off-by: Jason Wang --- hw/net/vhost_net-stub.c | 4 ++++ hw/net/vhost_net.c | 11 ++++++++++- include/net/vhost_net.h | 1 + 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/hw/net/vhost_net-stub.c b/hw/net/vhost_net-stub.c index aac0e98228..43e93e1a9a 100644 --- a/hw/net/vhost_net-stub.c +++ b/hw/net/vhost_net-stub.c @@ -86,6 +86,10 @@ int vhost_set_vring_enable(NetClientState *nc, int enable) return 0; } +int vhost_set_vring_ready(NetClientState *nc) +{ + return 0; +} int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu) { return 0; diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index eff9ec9177..6911282a0a 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -375,7 +375,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs, goto err_start; } - if (ncs[i].peer->vring_enable) { + if (peer->vring_enable) { /* restore vring enable state */ r = vhost_set_vring_enable(peer, peer->vring_enable); @@ -496,6 +496,15 @@ int vhost_set_vring_enable(NetClientState *nc, int enable) return 0; } +int vhost_set_vring_ready(NetClientState *nc) +{ + VHostNetState *net = get_vhost_net(nc); + const VhostOps *vhost_ops = net->dev.vhost_ops; + if (vhost_ops && vhost_ops->vhost_set_vring_ready) { + return vhost_ops->vhost_set_vring_ready(&net->dev); + } + return 0; +} int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu) { const VhostOps *vhost_ops = net->dev.vhost_ops; diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h index b47844bf29..247432a3b2 100644 --- a/include/net/vhost_net.h +++ b/include/net/vhost_net.h @@ -35,6 +35,7 @@ int vhost_net_notify_migration_done(VHostNetState *net, char* mac_addr); VHostNetState *get_vhost_net(NetClientState *nc); int vhost_set_vring_enable(NetClientState * nc, int enable); +int vhost_set_vring_ready(NetClientState *nc); uint64_t vhost_net_get_acked_features(VHostNetState *net); -- 2.21.1