virtio: add vhost-user-vsock-pci device

Add the PCI version of vhost-user-vsock

Launch QEMU like this:

  qemu -chardev socket,path=/tmp/vm.vsock,id=chr0 \
       -device vhost-user-vsock-pci,chardev=chr0
Signed-off-by: NStefano Garzarella <sgarzare@redhat.com>
Message-Id: <20200522122512.87413-4-sgarzare@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/virtio/Makefile.objs

@@ -22,6 +22,7 @@ obj-$(CONFIG_VHOST_USER_VSOCK) += vhost-vsock-common.o vhost-user-vsock.o
 
 ifeq ($(CONFIG_VIRTIO_PCI),y)
 obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock-pci.o
+obj-$(CONFIG_VHOST_USER_VSOCK) += vhost-user-vsock-pci.o
 obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk-pci.o
 obj-$(CONFIG_VHOST_USER_INPUT) += vhost-user-input-pci.o
 obj-$(CONFIG_VHOST_USER_SCSI) += vhost-user-scsi-pci.o

hw/virtio/vhost-user-vsock-pci.c

+/*
+ * Vhost-user vsock PCI Bindings
+ *
+ * Copyright 2020 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.  See the COPYING file in the
+ * top-level directory.
+ */
+
+#include "qemu/osdep.h"
+
+#include "virtio-pci.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/vhost-user-vsock.h"
+
+typedef struct VHostUserVSockPCI VHostUserVSockPCI;
+
+/*
+ * vhost-user-vsock-pci: This extends VirtioPCIProxy.
+ */
+#define TYPE_VHOST_USER_VSOCK_PCI "vhost-user-vsock-pci-base"
+#define VHOST_USER_VSOCK_PCI(obj) \
+        OBJECT_CHECK(VHostUserVSockPCI, (obj), TYPE_VHOST_USER_VSOCK_PCI)
+
+struct VHostUserVSockPCI {
+    VirtIOPCIProxy parent_obj;
+    VHostUserVSock vdev;
+};
+
+/* vhost-user-vsock-pci */
+
+static Property vhost_user_vsock_pci_properties[] = {
+    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vhost_user_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+    VHostUserVSockPCI *dev = VHOST_USER_VSOCK_PCI(vpci_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void vhost_user_vsock_pci_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+    k->realize = vhost_user_vsock_pci_realize;
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    device_class_set_props(dc, vhost_user_vsock_pci_properties);
+    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
+    pcidev_k->revision = 0x00;
+    pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
+}
+
+static void vhost_user_vsock_pci_instance_init(Object *obj)
+{
+    VHostUserVSockPCI *dev = VHOST_USER_VSOCK_PCI(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_VSOCK);
+}
+
+static const VirtioPCIDeviceTypeInfo vhost_user_vsock_pci_info = {
+    .base_name             = TYPE_VHOST_USER_VSOCK_PCI,
+    .generic_name          = "vhost-user-vsock-pci",
+    .transitional_name     = "vhost-user-vsock-pci-transitional",
+    .non_transitional_name = "vhost-user-vsock-pci-non-transitional",
+    .instance_size = sizeof(VHostUserVSockPCI),
+    .instance_init = vhost_user_vsock_pci_instance_init,
+    .class_init    = vhost_user_vsock_pci_class_init,
+};
+
+static void virtio_pci_vhost_register(void)
+{
+    virtio_pci_types_register(&vhost_user_vsock_pci_info);
+}
+
+type_init(virtio_pci_vhost_register)