What: /sys/firmware/plpks/config Date: February 2023 Contact: Nayna Jain Description: This optional directory contains read-only config attributes as defined by the PLPKS implementation. All data is in ASCII format. What: /sys/firmware/plpks/config/version Date: February 2023 Contact: Nayna Jain Description: Config version as reported by the hypervisor in ASCII decimal format. What: /sys/firmware/plpks/config/max_object_size Date: February 2023 Contact: Nayna Jain Description: Maximum allowed size of objects in the keystore in bytes, represented in ASCII decimal format. This is not necessarily the same as the max size that can be written to an update file as writes can contain more than object data, you should use the size of the update file for that purpose. What: /sys/firmware/plpks/config/total_size Date: February 2023 Contact: Nayna Jain Description: Total size of the PLPKS in bytes, represented in ASCII decimal format. What: /sys/firmware/plpks/config/used_space Date: February 2023 Contact: Nayna Jain Description: Current space consumed by the key store, in bytes, represented in ASCII decimal format. What: /sys/firmware/plpks/config/supported_policies Date: February 2023 Contact: Nayna Jain Description: Bitmask of supported policy flags by the hypervisor, represented as an 8 byte hexadecimal ASCII string. Consult the hypervisor documentation for what these flags are. What: /sys/firmware/plpks/config/signed_update_algorithms Date: February 2023 Contact: Nayna Jain Description: Bitmask of flags indicating which algorithms the hypervisor supports for signed update of objects, represented as a 16 byte hexadecimal ASCII string. Consult the hypervisor documentation for what these flags mean. What: /sys/firmware/plpks/config/wrapping_features Date: November 2025 Contact: Srish Srinivasan Description: Bitmask of the wrapping features indicating the wrapping algorithms that are supported for the H_PKS_WRAP_OBJECT requests , represented as a 8 byte hexadecimal ASCII string. Consult the hypervisor documentation for what these flags mean.