1*8e84b2d1SShilpasri G BhatWhat: /sys/firmware/opal/psr 2*8e84b2d1SShilpasri G BhatDate: August 2017 3*8e84b2d1SShilpasri G BhatContact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> 4*8e84b2d1SShilpasri G BhatDescription: Power-Shift-Ratio directory for Powernv P9 servers 5*8e84b2d1SShilpasri G Bhat 6*8e84b2d1SShilpasri G Bhat Power-Shift-Ratio allows to provide hints the firmware 7*8e84b2d1SShilpasri G Bhat to shift/throttle power between different entities in 8*8e84b2d1SShilpasri G Bhat the system. Each attribute in this directory indicates 9*8e84b2d1SShilpasri G Bhat a settable PSR. 10*8e84b2d1SShilpasri G Bhat 11*8e84b2d1SShilpasri G BhatWhat: /sys/firmware/opal/psr/cpu_to_gpu_X 12*8e84b2d1SShilpasri G BhatDate: August 2017 13*8e84b2d1SShilpasri G BhatContact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> 14*8e84b2d1SShilpasri G BhatDescription: PSR sysfs attributes for Powernv P9 servers 15*8e84b2d1SShilpasri G Bhat 16*8e84b2d1SShilpasri G Bhat Power-Shift-Ratio between CPU and GPU for a given chip 17*8e84b2d1SShilpasri G Bhat with chip-id X. This file gives the ratio (0-100) 18*8e84b2d1SShilpasri G Bhat which is used by OCC for power-capping. 19