---
name: "vldc"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/vldc"
---

# vldc(4)

virtual channel driver

## NAME

**vldc**, **vldcp** – virtual channel driver

## SYNOPSIS

**vldc\* at cbus?** **vldcp\* at vldc?**

## DESCRIPTION

The **vldc** driver provides access to services provided over virtual channels provided by the UltraSPARC Hypervisor as found on sun4v systems. Examples of such services are the Hypervisor Control Interface and the Variable Configuration domain service.

## SEE ALSO

[cbus(4)](/cbus/4.md), [intro(4)](/intro/4.md)

## HISTORY

The **vldc** driver first appeared in OpenBSD 5.3.

## AUTHORS

The **vldc** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.