xref: /openbmc/qemu/hw/virtio/vhost-vsock-pci.c (revision e1b1f534)
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 "hw/virtio/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 
vhost_vsock_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)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 
vhost_vsock_pci_class_init(ObjectClass * klass,void * data)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 
vhost_vsock_pci_instance_init(Object * obj)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 
virtio_pci_vhost_register(void)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)
97