[Qemu-devel] [PATCH v5 4/4] virtio-rng: change default backend to rng-builtin

[Laurent Vivier <lvivier@redhat.com>]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 backends/rng-builtin.c | 1 -
 hw/virtio/virtio-rng.c | 2 +-
 include/sysemu/rng.h   | 2 ++
 qemu-options.hx        | 2 +-
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/backends/rng-builtin.c b/backends/rng-builtin.c
index 6b9543a7de87..868055cbc723 100644
--- a/backends/rng-builtin.c
+++ b/backends/rng-builtin.c
@@ -10,7 +10,6 @@
 #include "qemu/main-loop.h"
 #include "qemu/guest-random.h"
 
-#define TYPE_RNG_BUILTIN "rng-builtin"
 #define RNG_BUILTIN(obj) OBJECT_CHECK(RngBuiltin, (obj), TYPE_RNG_BUILTIN)
 
 typedef struct RngBuiltin {
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index 73ffb476e030..f3706eaba55f 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -190,7 +190,7 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
     }
 
     if (vrng->conf.rng == NULL) {
-        Object *default_backend = object_new(TYPE_RNG_RANDOM);
+        Object *default_backend = object_new(TYPE_RNG_BUILTIN);
 
         user_creatable_complete(USER_CREATABLE(default_backend),
                                 &local_err);
diff --git a/include/sysemu/rng.h b/include/sysemu/rng.h
index 27b37da05d2e..9dc5e0e90100 100644
--- a/include/sysemu/rng.h
+++ b/include/sysemu/rng.h
@@ -24,6 +24,8 @@
 #define RNG_BACKEND_CLASS(klass) \
     OBJECT_CLASS_CHECK(RngBackendClass, (klass), TYPE_RNG_BACKEND)
 
+#define TYPE_RNG_BUILTIN "rng-builtin"
+
 typedef struct RngRequest RngRequest;
 typedef struct RngBackendClass RngBackendClass;
 typedef struct RngBackend RngBackend;
diff --git a/qemu-options.hx b/qemu-options.hx
index dc82a8c7ea14..c9784be83cb5 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4285,7 +4285,7 @@ The @option{share} boolean option is @var{on} by default with memfd.
 Creates a random number generator backend which obtains entropy from
 QEMU builtin functions. The @option{id} parameter is a unique ID that
 will be used to reference this entropy backend from the @option{virtio-rng}
-device.
+device. By default, the @option{virtio-rng} device uses this RNG backend.
 
 @item -object rng-random,id=@var{id},filename=@var{/dev/random}
 
-- 
2.20.1