If unsure, say M.
+config VIRTIO_PCI_LEGACY
+ bool "Support for legacy virtio draft 0.9.X and older devices"
+ default y
+ depends on VIRTIO_PCI
+ ---help---
+ Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
+
+ This option enables building a transitional driver, supporting
+ both devices conforming to Virtio 1 specification, and legacy devices.
+ If disabled, you get a slightly smaller, non-transitional driver,
+ with no legacy compatibility.
+
+ So look out into your driveway. Do you have a flying car? If
+ so, you can happily disable this option and virtio will not
+ break. Otherwise, leave it set. Unless you're testing what
+ life will be like in The Future.
+
+ If unsure, say Y.
+
config VIRTIO_BALLOON
tristate "Virtio balloon driver"
depends on VIRTIO