Commit 8b59b4da authored by Eugenio Pérez's avatar Eugenio Pérez Committed by Michael S. Tsirkin
Browse files

vdpa: add VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK flag 



This feature flag allows the driver enabling virtqueues both before and
after DRIVER_OK.

This is needed for software assisted live migration, so userland can
restore the device status in devices with control virtqueue before the
dataplane is enabled.

Signed-off-by: default avatarEugenio Pérez <eperezma@redhat.com>
Acked-by: default avatarShannon Nelson <shannon.nelson@amd.com>
Message-Id: <20230609092127.170673-2-eperezma@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent c1081002

include/uapi/linux/vhost_types.h

+4 −0
Original line number Diff line number Diff line
@@ -181,5 +181,9 @@ struct vhost_vdpa_iova_range { 
#define VHOST_BACKEND_F_SUSPEND  0x4

/* Device can be resumed */

#define VHOST_BACKEND_F_RESUME  0x5

/* Device supports the driver enabling virtqueues both before and after

 * DRIVER_OK

 */

#define VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK  0x6



#endif