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vhost-vsock: add virtio sockets device

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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
<imbrenda@linux.vnet.ibm.com>]

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
[mst: rebase to master]
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2016-08-16 13:27:22 +01:00 • committed by Michael S. Tsirkin
parent 947b205fdb
commit fc0b9b0e1c
11 changed files with 631 additions and 0 deletions
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18
hw/virtio/virtio-pci.h
View file

@ -31,6 +31,9 @@
#ifdef CONFIG_VHOST_SCSI
#include "hw/virtio/vhost-scsi.h"
#endif
#ifdef CONFIG_VHOST_VSOCK
#include "hw/virtio/vhost-vsock.h"
#endif
typedef struct VirtIOPCIProxy VirtIOPCIProxy;
typedef struct VirtIOBlkPCI VirtIOBlkPCI;
@ -44,6 +47,7 @@ typedef struct VirtIOInputPCI VirtIOInputPCI;
typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
typedef struct VirtIOInputHostPCI VirtIOInputHostPCI;
typedef struct VirtIOGPUPCI VirtIOGPUPCI;
typedef struct VHostVSockPCI VHostVSockPCI;
/* virtio-pci-bus */
@ -329,6 +333,20 @@ struct VirtIOGPUPCI {
VirtIOGPU vdev;
};
#ifdef CONFIG_VHOST_VSOCK
/*
* vhost-vsock-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VHOST_VSOCK_PCI "vhost-vsock-pci"
#define VHOST_VSOCK_PCI(obj) \
OBJECT_CHECK(VHostVSockPCI, (obj), TYPE_VHOST_VSOCK_PCI)
struct VHostVSockPCI {
VirtIOPCIProxy parent_obj;
VHostVSock vdev;
};
#endif
/* Virtio ABI version, if we increment this, we break the guest driver. */
#define VIRTIO_PCI_ABI_VERSION 0