libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_id\_ctrl\_nvm\_kpiocap - Key Per I/O Capabilities

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_id\_ctrl\_nvm\_kpiocap {  
**NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOS\_SHIFT** ,  
**NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOS\_MASK** ,  
**NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOSC\_SHIFT** ,  
**NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOSC\_MASK**

};

# [Constants](#Constants)

[NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOS\_SHIFT](#NVME_ID_CTRL_NVM_KPIOCAP_KPIOS_SHIFT)

Shift amount to get Key Per I/O Supported (KPIOS)

[NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOS\_MASK](#NVME_ID_CTRL_NVM_KPIOCAP_KPIOS_MASK)

Mask to get KPIOS

[NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOSC\_SHIFT](#NVME_ID_CTRL_NVM_KPIOCAP_KPIOSC_SHIFT)

Shift amount to get Key Per I/O Scope (KPIOSC)

[NVME\_ID\_CTRL\_NVM\_KPIOCAP\_KPIOSC\_MASK](#NVME_ID_CTRL_NVM_KPIOCAP_KPIOSC_MASK)

Mask to get KPIOSC

enum nvme\_id\_ctrl\_nvm\_kpiocap October 2026

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