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
  22 typedef struct VHostVSockPCI VHostVSockPCI;
  23
  24 /*
  25  * vhost-vsock-pci: This extends VirtioPCIProxy.
  26  */
  27 #define TYPE_VHOST_VSOCK_PCI "vhost-vsock-pci-base"
  28 DECLARE_INSTANCE_CHECKER(VHostVSockPCI, VHOST_VSOCK_PCI,
  29                          TYPE_VHOST_VSOCK_PCI)
  30
  31 struct VHostVSockPCI {
  32     VirtIOPCIProxy parent_obj;
  33     VHostVSock vdev;
  34 };
  35
  36 /* vhost-vsock-pci */
  37
  38 static Property vhost_vsock_pci_properties[] = {
  39     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
  40     DEFINE_PROP_END_OF_LIST(),
  41 };
  42
  43 static 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
  60 static 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
  74 static 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
  82 static 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
  91 static void virtio_pci_vhost_register(void)
  92 {
  93     virtio_pci_types_register(&vhost_vsock_pci_info);
  94 }
  95
  96 type_init(virtio_pci_vhost_register)