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VIORND(4)                  Kernel Interfaces 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.

NetBSD 7.1.2                   October 26, 2014                   NetBSD 7.1.2