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bh=JLuZSoaS7Bp6RBxB/Y5YH+sIMS4ZomLIm+8NA1SmnyY=; b=DfKrkok2lxqUlUO7BQsqmLZ9bHrdOJGoKDzB3/t/4cjq2V5gWUiAisFrd/CjkG6FmNQL7v rvT56KsQkELEoFivTMIGeryEGb4EaHfGz8LL0FYR/On+7VBDFsFo08NxgWoCBlIWtgX632 efyX1rr8JWBVxfJ3FYXBQp5ARe8odac= X-MC-Unique: 0s0ghNJFO_yIo--ompjaaw-1 From: Cindy Lu To: mst@redhat.com, armbru@redhat.com, eblake@redhat.com, cohuck@redhat.com, jasowang@redhat.com Subject: [RFC v3 5/8] vhost: introduce vhost_set_vring_ready method Date: Fri, 29 May 2020 22:06:17 +0800 Message-Id: <20200529140620.28759-6-lulu@redhat.com> In-Reply-To: <20200529140620.28759-1-lulu@redhat.com> References: <20200529140620.28759-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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charset="utf-8" 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 enabl= e) return 0; } =20 +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 d1d421e3d9..e2bc7de2eb 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -344,7 +344,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *= ncs, goto err_start; } =20 - if (ncs[i].peer->vring_enable) { + if (peer->vring_enable) { /* restore vring enable state */ r =3D vhost_set_vring_enable(peer, peer->vring_enable); =20 @@ -455,6 +455,15 @@ int vhost_set_vring_enable(NetClientState *nc, int ena= ble) return 0; } =20 +int vhost_set_vring_ready(NetClientState *nc) +{ + VHostNetState *net =3D get_vhost_net(nc); + const VhostOps *vhost_ops =3D 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 =3D net->dev.vhost_ops; diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h index 77e47398c4..8a6f208189 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, c= har* mac_addr); VHostNetState *get_vhost_net(NetClientState *nc); =20 int vhost_set_vring_enable(NetClientState * nc, int enable); +int vhost_set_vring_ready(NetClientState *nc); =20 uint64_t vhost_net_get_acked_features(VHostNetState *net); =20 --=20 2.21.1