| Message ID | 20230419024419.324436-1-rui.zhang@intel.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | powercap/intel_rapl: Introduce RAPL TPMI support | expand |
On Wed, Apr 19, 2023 at 4:44 AM Zhang Rui <rui.zhang@intel.com> wrote: > > The TPMI (Topology Aware Register and PM Capsule Interface) provides a > flexible, extendable and PCIe enumerable MMIO interface for PM features. > > The TPMI documentation can be downloaded from: > https://github.com/intel/tpmi_power_management > > Intel RAPL (Running Average Power Limit) is one of the features that > benefit from this. Using TPMI Interface has advantage over traditional MSR > (Model Specific Register) interface, where a thread needs to be scheduled > on the target CPU to read or write. Also the RAPL features vary between > CPU models, and hence lot of model specific code. Here TPMI provides an > architectural interface by providing hierarchical tables and fields, > which will not need any model specific implementation. > > Given that there are some differences between RAPL TPMI Interface and the > existing RAPL MSR/MMIO Interface, this patch series improves the RAPL > common code to satisfy the new requirements from TPMI interface, and then > introduces the RAPL TPMI Interface driver. > > Patch 1-4 cleanups and preparation work. > Patch 5 adds support for per Domain Unit register. > Patch 6-10 improves Power Limits handling, and provides support > for per Power Limit register, and per Power Limit Lock. > Patch 11-12 support rapl_package without online CPUs. So that TPMI > rapl_package still works with whole package offlined. > Patch 13-15 introduces RAPL Core support for TPMI Interface and the > RAPL TPMI Interface driver. > > This series depends on the TPMI base driver which has been merged in 6.3-rc1. > > thanks, > rui > --- > Changes since v1: > - use set_defaults() and variable name 'defaults' for rapl_defaults > structure. > - use 'rpi_default' instead of 'rpis' for the default rapl primitive > information of MSR/MMIO Interface. > - rephase the changelog of patch 7/15. > - change the subject of patch 10/15 and use a helper for getting the > primitive for power limit LOCK bit control. > > ---------------------------------------------------------------- > Zhang Rui (15): > powercap/intel_rapl: Remove unused field in struct rapl_if_priv > powercap/intel_rapl: Allow probing without CPUID match > powercap/intel_rapl: Support per Interface rapl_defaults > powercap/intel_rapl: Support per Interface primitive information > powercap/intel_rapl: Support per domain energy/power/time unit > powercap/intel_rapl: Use index to initialize primitive information > powercap/intel_rapl: Change primitive order > powercap/intel_rapl: Use bitmap for Power Limits > powercap/intel_rapl: Cleanup Power Limits support > powercap/intel_rapl: Introduce per Power Limit lock > powercap/intel_rapl: Remove redundant cpu parameter > powercap/intel_rapl: Make cpu optional for rapl_package > powercap/intel_rapl: Introduce RAPL I/F type > powercap/intel_rapl: Introduce core support for TPMI interface > powercap/intel_rapl_tpmi: Introduce RAPL TPMI interface driver > > drivers/powercap/Kconfig | 14 + > drivers/powercap/Makefile | 1 + > drivers/powercap/intel_rapl_common.c | 868 ++++++++++++--------- > drivers/powercap/intel_rapl_msr.c | 14 +- > drivers/powercap/intel_rapl_tpmi.c | 325 ++++++++ > .../intel/int340x_thermal/processor_thermal_rapl.c | 11 +- > include/linux/intel_rapl.h | 40 +- > 7 files changed, 875 insertions(+), 398 deletions(-) > create mode 100644 drivers/powercap/intel_rapl_tpmi.c The whole series has been applied as 6.5 material, thanks!
The TPMI (Topology Aware Register and PM Capsule Interface) provides a flexible, extendable and PCIe enumerable MMIO interface for PM features. The TPMI documentation can be downloaded from: https://github.com/intel/tpmi_power_management Intel RAPL (Running Average Power Limit) is one of the features that benefit from this. Using TPMI Interface has advantage over traditional MSR (Model Specific Register) interface, where a thread needs to be scheduled on the target CPU to read or write. Also the RAPL features vary between CPU models, and hence lot of model specific code. Here TPMI provides an architectural interface by providing hierarchical tables and fields, which will not need any model specific implementation. Given that there are some differences between RAPL TPMI Interface and the existing RAPL MSR/MMIO Interface, this patch series improves the RAPL common code to satisfy the new requirements from TPMI interface, and then introduces the RAPL TPMI Interface driver. Patch 1-4 cleanups and preparation work. Patch 5 adds support for per Domain Unit register. Patch 6-10 improves Power Limits handling, and provides support for per Power Limit register, and per Power Limit Lock. Patch 11-12 support rapl_package without online CPUs. So that TPMI rapl_package still works with whole package offlined. Patch 13-15 introduces RAPL Core support for TPMI Interface and the RAPL TPMI Interface driver. This series depends on the TPMI base driver which has been merged in 6.3-rc1. thanks, rui --- Changes since v1: - use set_defaults() and variable name 'defaults' for rapl_defaults structure. - use 'rpi_default' instead of 'rpis' for the default rapl primitive information of MSR/MMIO Interface. - rephase the changelog of patch 7/15. - change the subject of patch 10/15 and use a helper for getting the primitive for power limit LOCK bit control. ---------------------------------------------------------------- Zhang Rui (15): powercap/intel_rapl: Remove unused field in struct rapl_if_priv powercap/intel_rapl: Allow probing without CPUID match powercap/intel_rapl: Support per Interface rapl_defaults powercap/intel_rapl: Support per Interface primitive information powercap/intel_rapl: Support per domain energy/power/time unit powercap/intel_rapl: Use index to initialize primitive information powercap/intel_rapl: Change primitive order powercap/intel_rapl: Use bitmap for Power Limits powercap/intel_rapl: Cleanup Power Limits support powercap/intel_rapl: Introduce per Power Limit lock powercap/intel_rapl: Remove redundant cpu parameter powercap/intel_rapl: Make cpu optional for rapl_package powercap/intel_rapl: Introduce RAPL I/F type powercap/intel_rapl: Introduce core support for TPMI interface powercap/intel_rapl_tpmi: Introduce RAPL TPMI interface driver drivers/powercap/Kconfig | 14 + drivers/powercap/Makefile | 1 + drivers/powercap/intel_rapl_common.c | 868 ++++++++++++--------- drivers/powercap/intel_rapl_msr.c | 14 +- drivers/powercap/intel_rapl_tpmi.c | 325 ++++++++ .../intel/int340x_thermal/processor_thermal_rapl.c | 11 +- include/linux/intel_rapl.h | 40 +- 7 files changed, 875 insertions(+), 398 deletions(-) create mode 100644 drivers/powercap/intel_rapl_tpmi.c