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authorRusty Russell <rusty@rustcorp.com.au>2008-05-30 15:09:44 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-05-30 15:09:44 +1000
commitf7f510ec195781c857ab76366a3e1c59e1caae42 (patch)
treeab14c93c4559bd00fc347953dc787bfffba828a8 /drivers/char/hw_random/Kconfig
parent3ef536095446552823fc488fec1c5451aab1260d (diff)
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>
Diffstat (limited to 'drivers/char/hw_random/Kconfig')
-rw-r--r--drivers/char/hw_random/Kconfig9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 8d6c2089d2a..efd0b4db7c8 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -112,3 +112,12 @@ config HW_RANDOM_PASEMI
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.