From fc0b9b0e1cbb49017ea882758634cf876be17bc3 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Tue, 16 Aug 2016 13:27:22 +0100 Subject: vhost-vsock: add virtio sockets device Implement the new virtio sockets device for host<->guest communication using the Sockets API. Most of the work is done in a vhost kernel driver so that virtio-vsock can hook into the AF_VSOCK address family. The QEMU vhost-vsock device handles configuration and live migration while the rx/tx happens in the vhost_vsock.ko Linux kernel driver. The vsock device must be given a CID (host-wide unique address): # qemu -device vhost-vsock-pci,id=vhost-vsock-pci0,guest-cid=3 ... For more information see: http://qemu-project.org/Features/VirtioVsock [Endianness fixes and virtio-ccw support by Claudio Imbrenda ] Signed-off-by: Stefan Hajnoczi [mst: rebase to master] Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/vhost-backend.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'hw/virtio/vhost-backend.c') diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c index 7681f152f3..272a5ec584 100644 --- a/hw/virtio/vhost-backend.c +++ b/hw/virtio/vhost-backend.c @@ -172,6 +172,19 @@ static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx) return idx - dev->vq_index; } +#ifdef CONFIG_VHOST_VSOCK +static int vhost_kernel_vsock_set_guest_cid(struct vhost_dev *dev, + uint64_t guest_cid) +{ + return vhost_kernel_call(dev, VHOST_VSOCK_SET_GUEST_CID, &guest_cid); +} + +static int vhost_kernel_vsock_set_running(struct vhost_dev *dev, int start) +{ + return vhost_kernel_call(dev, VHOST_VSOCK_SET_RUNNING, &start); +} +#endif /* CONFIG_VHOST_VSOCK */ + static const VhostOps kernel_ops = { .backend_type = VHOST_BACKEND_TYPE_KERNEL, .vhost_backend_init = vhost_kernel_init, @@ -197,6 +210,10 @@ static const VhostOps kernel_ops = { .vhost_set_owner = vhost_kernel_set_owner, .vhost_reset_device = vhost_kernel_reset_device, .vhost_get_vq_index = vhost_kernel_get_vq_index, +#ifdef CONFIG_VHOST_VSOCK + .vhost_vsock_set_guest_cid = vhost_kernel_vsock_set_guest_cid, + .vhost_vsock_set_running = vhost_kernel_vsock_set_running, +#endif /* CONFIG_VHOST_VSOCK */ }; int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type) -- cgit 1.4.1