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virtio-rng-pci: create a default backend if none exists 

This allows you to specify:

  $ qemu -device virtio-rng-pci

And things will Just Work with a reasonable default.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2012-10-26 12:05:49 -05:00
parent 904d6f5880
commit 500054f161
2 changed files with 15 additions and 0 deletions
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13
hw/virtio-pci.c
View File

@ -857,6 +857,19 @@ 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;

2
hw/virtio-rng.h
View File

@ -13,6 +13,7 @@
#define _QEMU_VIRTIO_RNG_H
#include "qemu/rng.h"
#include "qemu/rng-random.h"
/* The Virtio ID for the virtio rng device */
#define VIRTIO_ID_RNG 4
@ -21,6 +22,7 @@ struct VirtIORNGConf {
RngBackend *rng;
uint64_t max_bytes;
uint32_t period_ms;
RndRandom *default_backend;
};
#endif