From df1b57fe59bc5b1486fe142e6ee76c493c52c543 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Mon, 1 Dec 2014 15:50:29 +0200 Subject: [PATCH] virtio_balloon: add legacy_only flag We have no plans to support virtio 1.0 in balloon driver. Add an explicit flag to mark it legacy only. This will be used by follow-up patches. Signed-off-by: Michael S. Tsirkin --- drivers/virtio/virtio_balloon.c | 1 + include/linux/virtio.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index c9703d4d6f67..4497def48dae 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -518,6 +518,7 @@ static unsigned int features[] = { }; static struct virtio_driver virtio_balloon_driver = { + .legacy_only = true, .feature_table = features, .feature_table_size = ARRAY_SIZE(features), .driver.name = KBUILD_MODNAME, diff --git a/include/linux/virtio.h b/include/linux/virtio.h index f70411eb9d27..2bbf62697671 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -132,6 +132,7 @@ int virtio_device_restore(struct virtio_device *dev); * @feature_table_size: number of entries in the feature table array. * @feature_table_legacy: same as feature_table but when working in legacy mode. * @feature_table_size_legacy: number of entries in feature table legacy array. + * @legacy_only: driver does not support virtio 1.0. * @probe: the function to call when a device is found. Returns 0 or -errno. * @remove: the function to call when a device is removed. * @config_changed: optional function to call when the device configuration @@ -144,6 +145,7 @@ struct virtio_driver { unsigned int feature_table_size; const unsigned int *feature_table_legacy; unsigned int feature_table_size_legacy; + bool legacy_only; int (*probe)(struct virtio_device *dev); void (*scan)(struct virtio_device *dev); void (*remove)(struct virtio_device *dev);