| What: /sys/bus/pci/devices/<BDF>/qat_kpt/ | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| Directory containing attributes related to the QAT Key Protection | |
| Technology (KPT) feature. KPT allows cryptographic keys to be used | |
| by the accelerator without being exposed in plaintext to the host. | |
| What: /sys/bus/pci/devices/<BDF>/qat_kpt/enable | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| (RW) Enables or disables Key Protection Technology (KPT). | |
| Write 1 to enable KPT, or 0 to disable it. | |
| Example usage:: | |
| # cat /sys/bus/pci/devices/<BDF>/qat_kpt/enable | |
| 0 | |
| # echo 1 > /sys/bus/pci/devices/<BDF>/qat_kpt/enable | |
| This attribute is only available on devices that support KPT. | |
| What: /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_fn | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| (RW) Configures the maximum number of KPT symmetric wrapping keys | |
| (SWKs) that a Virtual Function (VF) may be associated with. | |
| Valid values range from 0 to 128. A value of 0 indicates no limit. | |
| Example usage:: | |
| # cat /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_fn | |
| 128 | |
| # echo 128 > /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_fn | |
| This attribute is only available on devices that support KPT. | |
| What: /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_pasid | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| (RW) Configures the maximum number of KPT symmetric wrapping keys | |
| (SWKs) per Process Address Space ID (PASID). | |
| Valid values range from 0 to 128. A value of 0 indicates no limit. | |
| Example usage:: | |
| # cat /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_pasid | |
| 128 | |
| # echo 128 > /sys/bus/pci/devices/<BDF>/qat_kpt/swk_cnt_per_pasid | |
| This attribute is only available on devices that support KPT. | |
| What: /sys/bus/pci/devices/<BDF>/qat_kpt/swk_max_ttl | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| (RW) Configures the maximum Time To Live (TTL) for KPT symmetric | |
| wrapping keys (SWK). | |
| Valid values range from 0 to 31536000 seconds. A value of 0 | |
| indicates that the SWK TTL is unlimited. | |
| Example usage:: | |
| # cat /sys/bus/pci/devices/<BDF>/qat_kpt/swk_max_ttl | |
| 1000 | |
| # echo 1000 > /sys/bus/pci/devices/<BDF>/qat_kpt/swk_max_ttl | |
| This attribute is only available on devices that support KPT. | |
| What: /sys/bus/pci/devices/<BDF>/qat_kpt/swk_shared | |
| Date: August 2026 | |
| KernelVersion: 7.2 | |
| Contact: qat-linux@intel.com | |
| Description: | |
| (RW) Controls shared mode for KPT symmetric wrapping keys (SWK). | |
| Write 1 to enable shared mode, or 0 to disable it (non-shared mode). | |
| Example usage:: | |
| # cat /sys/bus/pci/devices/<BDF>/qat_kpt/swk_shared | |
| 0 | |
| # echo 1 > /sys/bus/pci/devices/<BDF>/qat_kpt/swk_shared | |
| This attribute is only available on devices that support KPT. |