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Subject: [RESEND Patch v1 11/37] vhost-user/msg: VHOST_USER_PROTOCOL_F_SET_DEVICE_ID
The feature, VHOST_USER_PROTOCOL_F_SET_DEVICE_ID, indicates that the slave side implementation supports different types of devices. The master tells the slave what type of device to create by sending the VHOST_USER_SET_DEVICE_ID message. Currently, only the net type is supported. Signed-off-by: Wei Wang <wei.w.wang@intel.com> --- hw/net/vhost_net.c | 1 + hw/virtio/vhost-user.c | 20 ++++++++++++++++++++ include/hw/virtio/vhost-user.h | 5 ++++- include/hw/virtio/vhost.h | 1 + 4 files changed, 26 insertions(+), 1 deletion(-) diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index f2d49ad..6524503 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -152,6 +152,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options) net->dev.max_queues = 1; net->dev.nvqs = 2; net->dev.vqs = net->vqs; + net->dev.dev_type = VIRTIO_ID_NET; if (backend_kernel) { r = vhost_net_get_fd(options->net_backend); diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 9e089d4..6391d10 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -452,6 +452,18 @@ static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) return vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features); } +static int vhost_user_set_dev_id(struct vhost_dev *dev, uint16_t virtio_id) +{ + VhostUserMsg msg = { + .request = VHOST_USER_SET_DEVICE_ID, + .flags = VHOST_USER_VERSION, + .payload.u64 = virtio_id, + .size = sizeof(msg.payload.u64), + }; + + return vhost_user_write(dev, &msg, NULL, 0); +} + static int vhost_user_set_owner(struct vhost_dev *dev) { VhostUserMsg msg = { @@ -509,6 +521,14 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque) return err; } + if (dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_SET_DEVICE_ID)) { + err = vhost_user_set_dev_id(dev, dev->dev_type); + if (err < 0) { + return err; + } + } + /* query the max queues we support if backend supports Multiple Queue */ if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) { err = vhost_user_get_u64(dev, VHOST_USER_GET_QUEUE_NUM, diff --git a/include/hw/virtio/vhost-user.h b/include/hw/virtio/vhost-user.h index ad5eac9..e79a2ec 100644 --- a/include/hw/virtio/vhost-user.h +++ b/include/hw/virtio/vhost-user.h @@ -12,6 +12,7 @@ enum VhostUserProtocolFeature { VHOST_USER_PROTOCOL_F_RARP = 2, VHOST_USER_PROTOCOL_F_REPLY_ACK = 3, VHOST_USER_PROTOCOL_F_VHOST_PCI = 4, + VHOST_USER_PROTOCOL_F_SET_DEVICE_ID = 5, VHOST_USER_PROTOCOL_F_MAX }; @@ -21,7 +22,8 @@ enum VhostUserProtocolFeature { #define VHOST_USER_PROTOCOL_FEATURES ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \ (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) | \ (1ULL << VHOST_USER_PROTOCOL_F_RARP) | \ - (1ULL << VHOST_USER_PROTOCOL_F_VHOST_PCI)) + (1ULL << VHOST_USER_PROTOCOL_F_VHOST_PCI) | \ + (1ULL << VHOST_USER_PROTOCOL_F_SET_DEVICE_ID)) typedef enum VhostUserRequest { VHOST_USER_NONE = 0, @@ -44,6 +46,7 @@ typedef enum VhostUserRequest { VHOST_USER_GET_QUEUE_NUM = 17, VHOST_USER_SET_VRING_ENABLE = 18, VHOST_USER_SEND_RARP = 19, + VHOST_USER_SET_DEVICE_ID = 20, VHOST_USER_MAX } VhostUserRequest; diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 1fe5aad..9cf32e2 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -43,6 +43,7 @@ struct vhost_dev { int n_mem_sections; MemoryRegionSection *mem_sections; struct vhost_virtqueue *vqs; + uint16_t dev_type; int nvqs; /* the first virtqueue which would be used by this vhost dev */ int vq_index; -- 2.7.4
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