From: KONRAD Frederic <fred.kon...@greensocs.com>
Create virtio-rng which extends virtio-device, so it can be connected on
virtio-bus.
Signed-off-by: KONRAD Frederic <fred.kon...@greensocs.com>
---
hw/virtio-pci.c | 13 +++----
hw/virtio-rng.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++----
hw/virtio-rng.h | 16 ++++++++
3 files changed, 133 insertions(+), 14 deletions(-)
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 6dc7732..4e35e04 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -892,13 +892,7 @@ static void virtio_rng_initfn(Object *obj)
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_VIRTIO_RNG_PROPERTIES(VirtIOPCIProxy, rng),
DEFINE_PROP_END_OF_LIST(),
};
@@ -959,6 +953,11 @@ static void virtio_pci_device_plugged(DeviceState *d)
PCI_DEVICE_ID_VIRTIO_BALLOON);
pci_config_set_class(proxy->pci_dev.config, PCI_CLASS_OTHERS);
break;
+ case VIRTIO_ID_RNG:
+ pci_config_set_device_id(proxy->pci_dev.config,
+ PCI_DEVICE_ID_VIRTIO_RNG);
+ pci_config_set_class(proxy->pci_dev.config, PCI_CLASS_OTHERS);
+ break;
default:
error_report("unknown device id\n");
break;
diff --git a/hw/virtio-rng.c b/hw/virtio-rng.c
index e672c40..98adef1 100644
--- a/hw/virtio-rng.c
+++ b/hw/virtio-rng.c
@@ -129,17 +129,33 @@ static void check_rate_limit(void *opaque)
qemu_get_clock_ms(vm_clock) + s->conf.period_ms);
}
+void virtio_rng_set_conf(DeviceState *dev, VirtIORNGConf *conf)
+{
+ VirtIORNG *vrng = VIRTIO_RNG(dev);
+ memcpy(&(vrng->conf), conf, sizeof(struct VirtIORNGConf));
+}
-VirtIODevice *virtio_rng_init(DeviceState *dev, VirtIORNGConf *conf)
+static VirtIODevice *virtio_rng_common_init(DeviceState *dev,
+ VirtIORNGConf *conf,
+ VirtIORNG **pvrng)
{
- VirtIORNG *vrng;
+ VirtIORNG *vrng = *pvrng;
VirtIODevice *vdev;
Error *local_err = NULL;
- vdev = virtio_common_init("virtio-rng", VIRTIO_ID_RNG, 0,
- sizeof(VirtIORNG));
-
- vrng = DO_UPCAST(VirtIORNG, vdev, vdev);
+ /*
+ * We have two cases here : the old virtio-rng-x device, and the
+ * refactored virtio-rng.
+ * This will disappear later in the serie.
+ */
+ if (vrng == NULL) {
+ vdev = virtio_common_init("virtio-rng", VIRTIO_ID_RNG, 0,
+ sizeof(VirtIORNG));
+ vrng = DO_UPCAST(VirtIORNG, vdev, vdev);
+ } else {
+ vdev = VIRTIO_DEVICE(vrng);
+ virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
+ }
vrng->rng = conf->rng;
if (vrng->rng == NULL) {
@@ -155,8 +171,12 @@ VirtIODevice *virtio_rng_init(DeviceState *dev,
VirtIORNGConf *conf)
}
vrng->vq = virtio_add_queue(vdev, 8, handle_input);
+ /*
+ * This will disappear later in the serie.
+ * We will use VirtioDeviceClass instead.
+ */
vrng->vdev.get_features = get_features;
-
+ /**/
vrng->qdev = dev;
memcpy(&(vrng->conf), conf, sizeof(struct VirtIORNGConf));
@@ -175,6 +195,15 @@ VirtIODevice *virtio_rng_init(DeviceState *dev,
VirtIORNGConf *conf)
return vdev;
}
+/*
+ * This two functions will be removed later in the serie.
+ */
+VirtIODevice *virtio_rng_init(DeviceState *dev, VirtIORNGConf *conf)
+{
+ VirtIORNG *vdev = NULL;
+ return virtio_rng_common_init(dev, conf, &vdev);
+}
+
void virtio_rng_exit(VirtIODevice *vdev)
{
VirtIORNG *vrng = DO_UPCAST(VirtIORNG, vdev, vdev);
@@ -184,3 +213,78 @@ void virtio_rng_exit(VirtIODevice *vdev)
unregister_savevm(vrng->qdev, "virtio-rng", vrng);
virtio_cleanup(vdev);
}
+/**/
+
+static int virtio_rng_device_init(VirtIODevice *vdev)
+{
+ DeviceState *qdev = DEVICE(vdev);
+ VirtIORNG *vrng = VIRTIO_RNG(vdev);
+
+ if (vrng->conf.rng == NULL) {
+ vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
+
+ object_property_add_child(OBJECT(qdev),
+ "default-backend",
+ OBJECT(vrng->conf.default_backend),
+ NULL);
+
+ object_property_set_link(OBJECT(qdev),
+ OBJECT(vrng->conf.default_backend),
+ "rng", NULL);
+ }
+
+ if (virtio_rng_common_init(qdev, &(vrng->conf), &vrng) == NULL) {
+ return -1;
+ }
+ return 0;
+}
+
+static int virtio_rng_device_exit(DeviceState *qdev)
+{
+ VirtIORNG *vrng = VIRTIO_RNG(qdev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
+
+ qemu_del_timer(vrng->rate_limit_timer);
+ qemu_free_timer(vrng->rate_limit_timer);
+ unregister_savevm(qdev, "virtio-rng", vrng);
+ virtio_common_cleanup(vdev);
+ return 0;
+}
+
+static Property virtio_rng_properties[] = {
+ DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNG, conf),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_rng_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+ dc->exit = virtio_rng_device_exit;
+ dc->props = virtio_rng_properties;
+ vdc->init = virtio_rng_device_init;
+ vdc->get_features = get_features;
+}
+
+static void virtio_rng_initfn(Object *obj)
+{
+ VirtIORNG *vrng = VIRTIO_RNG(obj);
+
+ object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
+ (Object **)&vrng->conf.rng, NULL);
+}
+
+static const TypeInfo virtio_rng_info = {
+ .name = TYPE_VIRTIO_RNG,
+ .parent = TYPE_VIRTIO_DEVICE,
+ .instance_size = sizeof(VirtIORNG),
+ .instance_init = virtio_rng_initfn,
+ .class_init = virtio_rng_class_init,
+};
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_rng_info);
+}
+
+type_init(virtio_register_types)
diff --git a/hw/virtio-rng.h b/hw/virtio-rng.h
index 3deb283..fd6d01f 100644
--- a/hw/virtio-rng.h
+++ b/hw/virtio-rng.h
@@ -15,6 +15,10 @@
#include "qemu/rng.h"
#include "qemu/rng-random.h"
+#define TYPE_VIRTIO_RNG "virtio-rng"
+#define VIRTIO_RNG(obj) \
+ OBJECT_CHECK(VirtIORNG, (obj), TYPE_VIRTIO_RNG)
+
/* The Virtio ID for the virtio rng device */
#define VIRTIO_ID_RNG 4
@@ -44,4 +48,16 @@ typedef struct VirtIORNG {
int64_t quota_remaining;
} VirtIORNG;
+/* 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 DEFINE_VIRTIO_RNG_PROPERTIES(_state, _conf_field) \
+ DEFINE_PROP_UINT64("max-bytes", _state, _conf_field.max_bytes, \
+ INT64_MAX), \
+ DEFINE_PROP_UINT32("period", _state, _conf_field.period_ms, 1 << 16)
+
+void virtio_rng_set_conf(DeviceState *dev, VirtIORNGConf *conf);
+
#endif
--
1.7.11.7
