[linux-6.6.y] hwmon: Add support for Zhaoxin core temperature monitoring

[leoliu-oc]

zhaoxin inclusion
category: feature
CVE: NA

---

Add support for the temperature sensor inside CPU. Supported are all known variants of the Zhaoxin processors.

[deepin-ci-robot]

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[opsiff]

/ok-to-test
/lgtm

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在temperature_access函数中，应该检查msr_index是否为0，如果是，则不需要写入MSR。
• zhaoxin_cputemp_online和zhaoxin_cputemp_down_prep函数中使用了全局变量pdev_list，这可能会导致并发访问时出现竞态条件。建议使用互斥锁来保护对pdev_list的访问。
• zhaoxin_cputemp_init函数中，对于CONFIG_HOTPLUG_CPU的检查应该放在模块初始化之前，以便在模块未加载时也能进行错误处理。
• zhaoxin_cputemp_exit函数中，应该先移除状态，然后再注销平台驱动。
• rdmsr_safe_on_cpu和wrmsr_safe_on_cpu函数中没有处理错误返回值，应该在调用这些函数的地方检查并处理错误。
• zhaoxin_cputemp_driver结构体中包含了platform_driver和cpuhp_state两个部分，建议将它们拆分为两个模块，以保持模块的单一职责。

是否建议立即修改:
是

[deepin-ci-robot]

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[opsiff]

@Avenger-285714 x86 defconfig上需要打开配置：SENSORS_ZHAOXIN_CPUTEMP