LXR qemu/hw/virtio/vhost-vsock-pci.c

   1/*
   2 * Vhost vsock PCI Bindings
   3 *
   4 * Copyright 2015 Red Hat, Inc.
   5 *
   6 * Authors:
   7 *  Stefan Hajnoczi <stefanha@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2 or
  10 * (at your option) any later version.  See the COPYING file in the
  11 * top-level directory.
  12 */
  13
  14#include "qemu/osdep.h"
  15
  16#include "virtio-pci.h"
  17#include "hw/qdev-properties.h"
  18#include "hw/virtio/vhost-vsock.h"
  19#include "qemu/module.h"
  20#include "qom/object.h"
  21
  22typedef struct VHostVSockPCI VHostVSockPCI;
  23
  24/*
  25 * vhost-vsock-pci: This extends VirtioPCIProxy.
  26 */
  27#define TYPE_VHOST_VSOCK_PCI "vhost-vsock-pci-base"
  28DECLARE_INSTANCE_CHECKER(VHostVSockPCI, VHOST_VSOCK_PCI,
  29                         TYPE_VHOST_VSOCK_PCI)
  30
  31struct VHostVSockPCI {
  32    VirtIOPCIProxy parent_obj;
  33    VHostVSock vdev;
  34};
  35
  36/* vhost-vsock-pci */
  37
  38static Property vhost_vsock_pci_properties[] = {
  39    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
  40    DEFINE_PROP_END_OF_LIST(),
  41};
  42
  43static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  44{
  45    VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev);
  46    DeviceState *vdev = DEVICE(&dev->vdev);
  47    VirtIODevice *virtio_dev = VIRTIO_DEVICE(vdev);
  48
  49    /*
  50     * To avoid migration issues, we force virtio version 1 only when
  51     * legacy check is enabled in the new machine types (>= 5.1).
  52     */
  53    if (!virtio_legacy_check_disabled(virtio_dev)) {
  54        virtio_pci_force_virtio_1(vpci_dev);
  55    }
  56
  57    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  58}
  59
  60static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
  61{
  62    DeviceClass *dc = DEVICE_CLASS(klass);
  63    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  64    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  65    k->realize = vhost_vsock_pci_realize;
  66    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  67    device_class_set_props(dc, vhost_vsock_pci_properties);
  68    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  69    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
  70    pcidev_k->revision = 0x00;
  71    pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
  72}
  73
  74static void vhost_vsock_pci_instance_init(Object *obj)
  75{
  76    VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj);
  77
  78    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  79                                TYPE_VHOST_VSOCK);
  80}
  81
  82static const VirtioPCIDeviceTypeInfo vhost_vsock_pci_info = {
  83    .base_name             = TYPE_VHOST_VSOCK_PCI,
  84    .generic_name          = "vhost-vsock-pci",
  85    .non_transitional_name = "vhost-vsock-pci-non-transitional",
  86    .instance_size = sizeof(VHostVSockPCI),
  87    .instance_init = vhost_vsock_pci_instance_init,
  88    .class_init    = vhost_vsock_pci_class_init,
  89};
  90
  91static void virtio_pci_vhost_register(void)
  92{
  93    virtio_pci_types_register(&vhost_vsock_pci_info);
  94}
  95
  96type_init(virtio_pci_vhost_register)
  97