Provide the standard VirtIO interface for block devices
Synopsis:
vdev virtio-blk options
vdev virtio-blk
Options:
- delayed
seconds|forever
- If specified, delay opening the device in the host until it is first
referenced by the guest.
- If the device isn't found in the host, continue trying for the number of
seconds specified by seconds before timing out (e.g.,
delayed 5). If seconds is set to
0 (e.g., delayed 0), try only once to
find the device on the host. If the argument is set to “forever” (e.g.,
delayed forever), never time out (i.e., keep trying to
find the device on the host).
- hostdev [<]host_filename
- Provides the name of the host file to use for the contents of the
device.
- A “<” symbol in front of host_filename indicates
that device contents will be enforced as read-only (e.g., hostdev
</dev/hd0 will make /dev/hd0 read-only to
the guest). The default (no <) is read/write access.
- intr
intr
- Signal intr for device interrupts. Not required when the
vdev appears as a PCI device.
- legacy
- Provide the VirtIO legacy interface (0.9.5) rather than the 1.0 standard
version.
- loc
addr
- Set the base address of the device registers to addr. Not
required if the vdev appears as a PCI device.
For a list of options available to all vdevs, see “Common vdev options” at the beginning of this
chapter.
Description:
ARM and x86. Normally this device appears as a PCI device, but if you specify the
loc and intr options, the guest will see it as
a memory-mapped I/O device at the specified location.