Drive Trust Alliance maintains the popular sedutil application (formally called msed), which eases configuration of Self-Encrypting Drives implementing the TCG OPAL specification. Until recently only SATA/SCSI drives were supported by sedutil.
As of the 1.10 release, NVMe SEDs are officially supported by the Linux version of sedutil. This paves the way for NVMe OPAL SED adoption across a wide variety of datacenter, workstation, client, mobile, and IoT platforms.
Additional background information about NVMe OPAL Self-Encrypting Drives is available from this August 2015 blog post.