[devel-6.6] Intel: Backport TPMI based RAPL PMU support for next Intel Xeon Granite Rapids (GNR) · Pull Request !3293 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=9256

RAPL energy counter MSRs are exposed via perf PMU. But this is done by separate code which is not part of RAPL framework, and it cannot be reused by other RAPL Interface drivers like TPMI RAPL.

Introduce two new APIs for PMU support in RAPL framework. This allows TPMI RAPL PMU support and also makes it possible for future cleanups of MSR RAPL PMU code.

Commits from mainline kernel v6.10-rc1:
963a9ad3c589 powercap: intel_rapl_tpmi: Enable PMU support
575024a8aa7c powercap: intel_rapl: Introduce APIs for PMU support
72b8b94155d9 powercap: intel_rapl: Sort header files

Test:
Before backport, there's no "power/energy-{pkg,psys,ram}" events available on GNR:

```
$ perf list | grep -i energy
$
```

After backport on GNR:

```
$ perf list | grep -i energy
  power/energy-pkg/                                  [Kernel PMU event]
  power/energy-psys/                                 [Kernel PMU event]
  power/energy-ram/                                  [Kernel PMU event]
$
$ perf stat -a -e power/energy-pkg/ -e power/energy-ram/ -e power/energy-psys/ sleep 2

Performance counter stats for 'system wide':

225.78 Joules power/energy-pkg/
             10.71 Joules power/energy-ram/
              0.05 Joules power/energy-psys/

2.004303771 seconds time elapsed

$
```

The backported patches are identical as mainline version, and have been verified on Intel GNR platform.

Known issue:
N/A

Configs:
Note that to make RAPL PMU work, TPMI must be enabled in kernel with configs:
CONFIG_INTEL_TPMI=m
CONFIG_INTEL_RAPL_TPMI=m

类型	指派人员	状态
审查	xunlei Artie Ding zelindeng Guixin Liu	已完成 (0/0人)
测试	小龙已测试通过	已完成 (1/1人)

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