[openEuler-22.03-LTS-SP2] arm64支持CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE功能

【特性描述】
支持CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE功能，在多核时钟不同步情况下，可提高timekeeping模块的可靠性。本特性仅适用于ARM64
【特性竞争力】
提高多核不同步时timekeeping可靠性
【硬件架构】
ARM64

【特性约束】
N/A

【涉及仓库】
https://gitee.com/openeuler/kernel

【交付个人/团队】
廖宇

Hi liaoyu15, welcome to the openEuler Community.
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If you have any questions, please contact the SIG: Kernel, and any of the maintainers: @YangYingliang , @成坚 (CHENG Jian) , @jiaoff , @刘勇强 , @wangxiongfeng , @朱科潜 , @WangShaoBo , @lujialin , @Xu Kuohai , @冷嘲啊 , @Lingmingqiang , @yuzenghui , @juntian , @OSSIM , @陈结松 , @whoisxxx , @koulihong , @刘恺 , @hanjun-guo , @woqidaideshi , @Chiqijun , @Kefeng , @ThunderTown , @AlexGuo , @kylin-mayukun , @Zheng Zucheng , @柳歆 , @Jackie Liu , @zhujianwei001 , @郑振鹏 , @SuperSix173 , @colyli , @Zhang Yi , @htforge , @Yuehaibing , @xiehaocheng , @guzitao , @CTC-Xibo.Wang , @zhanghongchen , @chen wei , @Jason Zeng , @苟浩 , @DuanqiangWen , @georgeguo , @毛泓博 , @AllenShi , @zhangjialin , @Wei Li , @tcc@hello , @谭小飞 , @Fred Kimmy , @LiYihang , @young1c , @hucz , @WangBoe2022 , @chenke , @李力军 , @Yang Shen , @wsoydl , @sanglipeng , @zhangchangzhong , @jimmy_hero , @YGN-NDWD-Official , @Xie XiuQi , @zhengzengkai

1 关键结论

1. 新增用例1个，修改用例0个，继承用例0个，删除用例0个，用例执行率100%；
1. AR覆盖率为100%；

2 被测需求列表

Currently, only x86 architecture supports the CLOCKSOURCE_VALIDATE_LAST_CYCLE
option. This option ensures that the timestamps returned by the clocksource are
monotonically increasing, and helps avoid issues caused by hardware failures.
This commit makes CLOCKSOURCE_VALIDATE_LAST_CYCLE configurable on
the arm64 architecture, helps increase system stability and reliability.

3 用例列表

继承用例0个，新增用例1个，修改用例0个，删除用例0个
序号变更描述用例编号关联AR编号

4 测试执行

总共执行1个用例，其中功能用例1个，fuzz用例0个，所有用例执行通过。

4.1 DT用例执行记录

用例执行通过
输入图片说明

4.2 DT执行覆盖情况

DT代码覆盖率为100%
输入图片说明

GVP openEuler / kernel

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