virtio_console(4) [freebsd man page]

VIRTIO_CONSOLE(4)					   BSD Kernel Interfaces Manual 					 VIRTIO_CONSOLE(4)

NAME

     virtio_console -- VirtIO Console driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device virtio_console

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   virtio_console_load="YES"

DESCRIPTION

     The virtio_console device driver provides support for VirtIO console devices.

     The console device may have one or more ports.  Each port is similar to a simple serial interface, and each port is accessible through
     tty(4).

FILES

     /dev/ttyV?.??

SEE ALSO

     tty(4), virtio(4)

HISTORY

     The virtio_console driver was written by Bryan Venteicher <bryanv@FreeBSD.org>.

BSD
								 October 22, 2014							       BSD

VIRTIO(4)						   BSD Kernel Interfaces Manual 						 VIRTIO(4)

NAME

     virtio -- VirtIO Device Support

SYNOPSIS

     To compile VirtIO device support into the kernel, place the following lines in your kernel configuration file:

	   device virtio
	   device virtio_pci

     Alternatively, to load VirtIO support as modules at boot time, place the following lines in loader.conf(5):

	   virtio_load="YES"
	   virtio_pci_load="YES"

DESCRIPTION

     VirtIO is a specification for para-virtualized I/O in a virtual machine (VM).  Traditionally, the hypervisor emulated real devices such as an
     Ethernet interface or disk controller to provide the VM with I/O.	This emulation is often inefficient.

     VirtIO defines an interface for efficient I/O between the hypervisor and VM.  The virtio module provides a shared memory transport called a
     virtqueue.  The virtio_pci device driver represents an emulated PCI device that the hypervisor makes available to the VM.	This device pro-
     vides the probing, configuration, and interrupt notifications needed to interact with the hypervisor.  FreeBSD supports the following VirtIO
     devices:

	   Ethernet  An emulated Ethernet device is provided by the vtnet(4) device driver.

	   Block     An emulated disk controller is provided by the virtio_blk(4) device driver.

	   SCSI      An emulated SCSI HBA is provided by the virtio_scsi(4) device driver.

	   Balloon   A pseudo-device to allow the VM to release memory back to the hypervisor is provided by the virtio_balloon(4) device driver.

SEE ALSO

     virtio_balloon(4), virtio_blk(4), virtio_console(4), virtio_scsi(4), vtnet(4)

HISTORY

     Support for VirtIO first appeared in FreeBSD 9.0.

AUTHORS

     FreeBSD support for VirtIO was first added by Bryan Venteicher <bryanv@FreeBSD.org>.

BSD
								 January 22, 2012							       BSD