diff options
Diffstat (limited to 'hw/virtio-pci.c')
| -rw-r--r-- | hw/virtio-pci.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index 96031500ee..71f4fb5dc6 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -852,6 +852,41 @@ static void virtio_balloon_exit_pci(PCIDevice *pci_dev) virtio_exit_pci(pci_dev); } +static int virtio_rng_init_pci(PCIDevice *pci_dev) +{ + VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); + VirtIODevice *vdev; + + if (proxy->rng.rng == NULL) { + proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); + + object_property_add_child(OBJECT(pci_dev), + "default-backend", + OBJECT(proxy->rng.default_backend), + NULL); + + object_property_set_link(OBJECT(pci_dev), + OBJECT(proxy->rng.default_backend), + "rng", NULL); + } + + vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); + if (!vdev) { + return -1; + } + virtio_init_pci(proxy, vdev); + return 0; +} + +static void virtio_rng_exit_pci(PCIDevice *pci_dev) +{ + VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); + + virtio_pci_stop_ioeventfd(proxy); + virtio_rng_exit(proxy->vdev); + virtio_exit_pci(pci_dev); +} + static Property virtio_blk_properties[] = { DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf), @@ -982,6 +1017,50 @@ static TypeInfo virtio_balloon_info = { .class_init = virtio_balloon_class_init, }; +static void virtio_rng_initfn(Object *obj) +{ + PCIDevice *pci_dev = PCI_DEVICE(obj); + VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); + + object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, + (Object **)&proxy->rng.rng, NULL); +} + +static Property virtio_rng_properties[] = { + DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), + /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If + you have an entropy source capable of generating more entropy than this + and you can pass it through via virtio-rng, then hats off to you. Until + then, this is unlimited for all practical purposes. + */ + DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX), + DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), + DEFINE_PROP_END_OF_LIST(), +}; + +static void virtio_rng_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->init = virtio_rng_init_pci; + k->exit = virtio_rng_exit_pci; + k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; + k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; + k->revision = VIRTIO_PCI_ABI_VERSION; + k->class_id = PCI_CLASS_OTHERS; + dc->reset = virtio_pci_reset; + dc->props = virtio_rng_properties; +} + +static TypeInfo virtio_rng_info = { + .name = "virtio-rng-pci", + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(VirtIOPCIProxy), + .instance_init = virtio_rng_initfn, + .class_init = virtio_rng_class_init, +}; + static int virtio_scsi_init_pci(PCIDevice *pci_dev) { VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); @@ -1046,6 +1125,7 @@ static void virtio_pci_register_types(void) type_register_static(&virtio_serial_info); type_register_static(&virtio_balloon_info); type_register_static(&virtio_scsi_info); + type_register_static(&virtio_rng_info); } type_init(virtio_pci_register_types) |