kernel/tools/power/cpupower/lib/powercap.c, branch linux-rolling-stable

pm:cpupower: Add missing powercap_set_enabled() stub function

2024-10-04T14:32:26Z

[ Upstream commit 4b80294fb53845dc5c98cca0c989da09150f2ca9 ] There was a symbol listed in the powercap.h file that was not implemented. Implement it with a stub return of 0. Programs like SWIG require that functions that are defined in the headers be implemented. Fixes: c2294c1496b7 ("cpupower: Introduce powercap intel-rapl library and powercap-info command") Suggested-by: Shuah Khan Signed-off-by: John B. Wyatt IV Signed-off-by: John B. Wyatt IV Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin

cpupower:Fix resource leaks in sysfs_get_enabled()

2023-05-08T14:11:24Z

The sysfs_get_enabled() opened file processor not closed, may cause a file handle leak. Putting error handling and resource cleanup code together makes the code easy to maintain and read. Removed the unnecessary else if branch from the original function, as it should return an error in cases other than '0'. Signed-off-by: Hao Zeng Suggested-by: Shuah Khan Signed-off-by: Shuah Khan

cpupower: Introduce powercap intel-rapl library and powercap-info command

2022-11-30T23:48:28Z

Read out powercap zone information via: cpupower powercap-info and show the zone hierarchy to the user: ./cpupower powercap-info Driver: intel-rapl Powercap domain hierarchy: Zone: package-0 (enabled) Power consumption can be monitored in micro Watts Zone: core (disabled) Power consumption can be monitored in micro Watts Zone: uncore (disabled) Power consumption can be monitored in micro Watts Zone: dram (disabled) Power consumption can be monitored in micro Watts There is a dummy -a option for powercap-info which can/should be used to show more detailed info later. Like that other args can be added easily later as well. A enable/disable option via powercap-set subcommand is also an enhancement for later. Also not all RAPL domains are shown. The func walking through RAPL subdomains is restricted and hardcoded to: "intel-rapl/intel-rapl:0" On my system above powercap domains map to: intel-rapl/intel-rapl:0 -> pack (age-0) intel-rapl/intel-rapl:0/intel-rapl:0:0 -> core intel-rapl/intel-rapl:0/intel-rapl:0:1 -> uncore Missing ones on my system are: intel-rapl-mmio/intel-rapl-mmio:0 -> pack (age-0) intel-rapl/intel-rapl:1 -> psys This could get enhanced in: struct powercap_zone *powercap_init_zones() and adopted to walk through all intel-rapl zones, but also to other powercap drivers like dtpm (Dynamic Thermal Power Management framework), cmp with: drivers/powercap/dtpm_* Signed-off-by: Thomas Renninger CC: Shuah Khan Signed-off-by: Shuah Khan