libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct tcg\_l0\_sum - Single User Mode feature (0x0201)

# [SYNOPSIS](#SYNOPSIS)

struct tcg\_l0\_sum {  
**\_\_be32 num\_locking\_objects;**  
**\_\_u8 flags;**  
**\_\_u8 rsvd5\[7];**  
};

# [Members](#Members)

[num\_locking\_objects](#num_locking_objects)

Number of locking objects supported

[flags](#flags)

Flags, see *enum tcg\_l0\_sum\_flags*

[rsvd5](#rsvd5)

Reserved

# [Description](#Description)

TCG Opal SSC Feature Set: Single User Mode 1.00, section 4.2.1.

struct tcg\_l0\_sum October 2026

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Document: tcg_l0_sum-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli