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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 /include/linux/virtio_rng.h
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 'include/linux/virtio_rng.h')
-rw-r--r--include/linux/virtio_rng.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/virtio_rng.h b/include/linux/virtio_rng.h
new file mode 100644
index 000000000000..331afb6c9f62
--- /dev/null
+++ b/include/linux/virtio_rng.h
@@ -0,0 +1,8 @@
+#ifndef _LINUX_VIRTIO_RNG_H
+#define _LINUX_VIRTIO_RNG_H
+#include <linux/virtio_config.h>
+
+/* The ID for virtio_rng */
+#define VIRTIO_ID_RNG 4
+
+#endif /* _LINUX_VIRTIO_RNG_H */