18e84b2d1SShilpasri G BhatWhat: /sys/firmware/opal/psr 28e84b2d1SShilpasri G BhatDate: August 2017 3fae57306SStephen RothwellContact: Linux for PowerPC mailing list <linuxppc-dev@lists.ozlabs.org> 48e84b2d1SShilpasri G BhatDescription: Power-Shift-Ratio directory for Powernv P9 servers 58e84b2d1SShilpasri G Bhat 68e84b2d1SShilpasri G Bhat Power-Shift-Ratio allows to provide hints the firmware 78e84b2d1SShilpasri G Bhat to shift/throttle power between different entities in 88e84b2d1SShilpasri G Bhat the system. Each attribute in this directory indicates 98e84b2d1SShilpasri G Bhat a settable PSR. 108e84b2d1SShilpasri G Bhat 118e84b2d1SShilpasri G BhatWhat: /sys/firmware/opal/psr/cpu_to_gpu_X 128e84b2d1SShilpasri G BhatDate: August 2017 13fae57306SStephen RothwellContact: Linux for PowerPC mailing list <linuxppc-dev@lists.ozlabs.org> 148e84b2d1SShilpasri G BhatDescription: PSR sysfs attributes for Powernv P9 servers 158e84b2d1SShilpasri G Bhat 168e84b2d1SShilpasri G Bhat Power-Shift-Ratio between CPU and GPU for a given chip 178e84b2d1SShilpasri G Bhat with chip-id X. This file gives the ratio (0-100) 188e84b2d1SShilpasri G Bhat which is used by OCC for power-capping. 19