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FORK: QEMU emulator
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vhost-vsock-pci.c (2831B)

      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 
     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)