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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 <email@example.com> 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 8.0 October 26, 2014 NetBSD 8.0