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 --- include/hw/virtio/vhost-backend.h | 5 +++++ include/hw/virtio/vhost-vsock.h | 41 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 include/hw/virtio/vhost-vsock.h (limited to 'include/hw/virtio') diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index cf7f0b5a69..6e90703cad 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -73,6 +73,9 @@ typedef int (*vhost_migration_done_op)(struct vhost_dev *dev, typedef bool (*vhost_backend_can_merge_op)(struct vhost_dev *dev, uint64_t start1, uint64_t size1, uint64_t start2, uint64_t size2); +typedef int (*vhost_vsock_set_guest_cid_op)(struct vhost_dev *dev, + uint64_t guest_cid); +typedef int (*vhost_vsock_set_running_op)(struct vhost_dev *dev, int start); typedef struct VhostOps { VhostBackendType backend_type; @@ -102,6 +105,8 @@ typedef struct VhostOps { vhost_requires_shm_log_op vhost_requires_shm_log; vhost_migration_done_op vhost_migration_done; vhost_backend_can_merge_op vhost_backend_can_merge; + vhost_vsock_set_guest_cid_op vhost_vsock_set_guest_cid; + vhost_vsock_set_running_op vhost_vsock_set_running; } VhostOps; extern const VhostOps user_ops; diff --git a/include/hw/virtio/vhost-vsock.h b/include/hw/virtio/vhost-vsock.h new file mode 100644 index 0000000000..7b9205fe3f --- /dev/null +++ b/include/hw/virtio/vhost-vsock.h @@ -0,0 +1,41 @@ +/* + * Vhost vsock virtio device + * + * Copyright 2015 Red Hat, Inc. + * + * Authors: + * Stefan Hajnoczi + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ + +#ifndef _QEMU_VHOST_VSOCK_H +#define _QEMU_VHOST_VSOCK_H + +#include "hw/virtio/virtio.h" +#include "hw/virtio/vhost.h" + +#define TYPE_VHOST_VSOCK "vhost-vsock-device" +#define VHOST_VSOCK(obj) \ + OBJECT_CHECK(VHostVSock, (obj), TYPE_VHOST_VSOCK) + +typedef struct { + uint64_t guest_cid; + char *vhostfd; +} VHostVSockConf; + +typedef struct { + /*< private >*/ + VirtIODevice parent; + VHostVSockConf conf; + struct vhost_virtqueue vhost_vqs[2]; + struct vhost_dev vhost_dev; + VirtQueue *event_vq; + QEMUTimer *post_load_timer; + + /*< public >*/ +} VHostVSock; + +#endif /* _QEMU_VHOST_VSOCK_H */ -- cgit v1.2.3