DOKK / manpages / debian 12 / libnvme-dev / nvme_id_ctrl_hctm.2.en
libnvme(2) API Manual libnvme(2)

enum nvme_id_ctrl_hctm - Flags indicate the attributes of the host controlled thermal management feature

enum nvme_id_ctrl_hctm {
NVME_CTRL_HCTMA_HCTM

};

then the controller supports host controlled thermal management, and the Set Features command and Get Features command with the Feature Identifier field set to NVME_FEAT_FID_HCTM.
enum nvme_id_ctrl_hctm January 2023