AMD Turin Perf IBS full support patches for Anolis 6.6 kernel · Pull Request !6197 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=27983
 
**AMD Turin Perf IBS full support patches for Anolis 6.6 kernel** 
perf/amd/ibs: Add support for OP Load Latency Filtering
perf/amd/ibs: Update DTLB/PageSize decode logic
perf amd ibs: Sync arch/x86/include/asm/amd-ibs.h header with the kernel 
perf doc: Add AMD IBS usage document
perf amd ibs: Add Load Latency bits in raw dump
perf amd ibs: Incorporate Zen5 DTLB and PageSize information
perf mem: Add mem_events into the supported perf_pmu
perf mem: Clean up perf_mem_events__ptr()
perf mem: Clean up perf_mem_events__name()
perf mem: Clean up perf_mem_event__supported()
perf mem/c2c amd: Add ldlat support

This patch series contains 11 commits  that improve precision, usability, and architecture coverage for AMD platforms, enabling detailed performance and memory analysis—especially for Zen5 and future CPUs.

AMD IBS Improvements
- Added OP Load Latency Filtering for more precise performance analysis.
- Updated DTLB/PageSize decode logic for better memory access interpretation.
- Synced amd-ibs.h header with latest kernel definitions.
- Exposed Load Latency bits in raw IBS dumps for deeper profiling.
- Integrated Zen5-specific DTLB and PageSize support.
- Published AMD IBS usage documentation for developers.

Perf Memory Enhancements
- Integrated mem_events into perf_pmu for broader event tracking.
- Cleaned up internal functions for improved maintainability: 
- perf_mem_events__ptr()
- perf_mem_events__name()
- perf_mem_event__supported()
- Added ldlat support for AMD in C2C analysis to enhance memory latency profiling.

Unit testing
############

```

1. Verify the ldlat capability is enabled:
   $ cat /sys/bus/event_source/devices/ibs_op/caps/ldlat
   1
2. Check available IBS capabilities:
   $ ls /sys/bus/event_source/devices/ibs_op/caps/
   dtlb_pgsize  ldlat  zen4_ibs_extensions

3. Record performance data with ldlat threshold set to 128:
$ sudo ./perf record -a -e ibs_op/ldlat=128/ -- sleep 5
[sudo] password for amd:
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.329 MB perf.data (1525 samples) ]

4. Generate the performance report:
$ sudo ./perf report

![Image description](https://foruda.gitee.com/images/1765443917113113663/1fca425d_14374507.png "屏幕截图")

$ man perf-amd-ibs
![Image description](https://foruda.gitee.com/images/1765443856586718171/c4f1e7b0_14374507.png "屏幕截图")

```

类型	指派人员	状态
审查	王鹏 xunlei 半叶枫尘 Artie Ding xueshuai 冯光辉 Guixin Liu kun-llfl Xuchun Shang	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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