virtio: An entropy device, as suggested by hpa.
Note that by itself, having a "hardware" random generator does very
little: you should probably run "rngd" in your guest to feed this into
the kernel entropy pool.
Included:
virtio_rng: dont use vmalloced addresses for virtio
If virtio_rng is build as a module, random_data is an address
in vmalloc space. As virtio expects guest real addresses, this
can cause any kind of funny behaviour, so lets allocate
random_data dynamically with kmalloc.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 8d6c208..efd0b4d 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -112,3 +112,12 @@
If unsure, say Y.
+config HW_RANDOM_VIRTIO
+ tristate "VirtIO Random Number Generator support"
+ depends on HW_RANDOM && VIRTIO
+ ---help---
+ This driver provides kernel-side support for the virtual Random Number
+ Generator hardware.
+
+ To compile this driver as a module, choose M here: the
+ module will be called virtio-rng. If unsure, say N.