From 6eac8aec02b1e9c5a626820bcca7654cb7d006a7 Mon Sep 17 00:00:00 2001 From: KONRAD Frederic Date: Wed, 24 Apr 2013 10:07:55 +0200 Subject: virtio-rng: add virtio-rng device. Create virtio-rng-device which extends virtio-device, so it can be connected on virtio-bus. Signed-off-by: KONRAD Frederic Tested-by: Cornelia Huck Acked-by: Amit Shah Message-id: 1366790881-3026-3-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori --- hw/s390x/virtio-ccw.c | 3 +- hw/virtio/virtio-pci.c | 8 +-- hw/virtio/virtio-rng.c | 108 ++++++++++++++++++++++++++++++++++++++--- include/hw/virtio/virtio-rng.h | 14 ++++++ 4 files changed, 117 insertions(+), 16 deletions(-) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 56539d34e3..7fdc8c3799 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -958,8 +958,7 @@ static void virtio_ccw_rng_initfn(Object *obj) static Property virtio_ccw_rng_properties[] = { DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), - DEFINE_PROP_UINT64("max-bytes", VirtioCcwDevice, rng.max_bytes, INT64_MAX), - DEFINE_PROP_UINT32("period", VirtioCcwDevice, rng.period_ms, 1 << 16), + DEFINE_VIRTIO_RNG_PROPERTIES(VirtioCcwDevice, rng), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index a1f15a804e..4860db1d8a 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -989,13 +989,7 @@ 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(), }; diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c index 05b4d57b2f..b70975b09f 100644 --- a/hw/virtio/virtio-rng.c +++ b/hw/virtio/virtio-rng.c @@ -130,17 +130,27 @@ static void check_rate_limit(void *opaque) qemu_get_clock_ms(vm_clock) + s->conf.period_ms); } - -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) { @@ -156,6 +166,7 @@ VirtIODevice *virtio_rng_init(DeviceState *dev, VirtIORNGConf *conf) } vrng->vq = virtio_add_queue(vdev, 8, handle_input); + vrng->vdev.get_features = get_features; vrng->qdev = dev; @@ -176,6 +187,15 @@ 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); @@ -185,3 +205,77 @@ 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/include/hw/virtio/virtio-rng.h b/include/hw/virtio/virtio-rng.h index c578c00c1b..973d8095d3 100644 --- a/include/hw/virtio/virtio-rng.h +++ b/include/hw/virtio/virtio-rng.h @@ -15,6 +15,10 @@ #include "sysemu/rng.h" #include "sysemu/rng-random.h" +#define TYPE_VIRTIO_RNG "virtio-rng-device" +#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 +48,14 @@ 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) + #endif -- cgit v1.2.3