VIORND(4) | Device Drivers Manual | VIORND(4)

# NAME

`viornd` —
VirtIO entropy source

# SYNOPSIS

`viornd* at virtio?`

# DESCRIPTION

When the system has entropy demand, the `viornd` driver, used with a compatible hypervisor such as QEMU, KVM, or Google Compute Engine, requests entropy using the VirtIO random number interface and feeds it into the system entropy pool.

# SEE ALSO

rnd(4), virtio(4)

# HISTORY

The `viornd` driver appeared in OpenBSD 5.5.

# AUTHORS

The `viornd` driver was written by Stephan Fritsch <sf@fritsch.de> and reworked to request entropy upon demand by
Thor Lancelot Simon <tls@NetBSD.org>.

# CAVEATS

VirtIO appears to support at least 8 pending entropy requests, but `viornd` currently supports only one pending request at a time.

October 26, 2014 | NetBSD 9.0