MEMBARRIER_CMD_QUERY					0
MEMBARRIER_CMD_GLOBAL					(1 << 0)
MEMBARRIER_CMD_GLOBAL_EXPEDITED				(1 << 1)
MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED		(1 << 2)
MEMBARRIER_CMD_PRIVATE_EXPEDITED			(1 << 3)
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED		(1 << 4)
MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE		(1 << 5)
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE	(1 << 6)
MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ			(1 << 7)
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ		(1 << 8)
MEMBARRIER_CMD_GET_REGISTRATIONS			(1 << 9)