[linux-6.6.y] x86/mce: Set bios_cmci_threshold for CMCI threshold

[leoliu-oc]

zhaoxin inclusion
category: bugfix
CVE: NA

---

In the Linux kernel, the CMCI threshold is set to 1 by default. This patch prevents Linux from overwriting the CMCI threshold set by the bios. With this patch, the CMCI threshold can be set through the BIOS, which can also avoid CMCI storms, on Zhaoxin/Centaur CPUs.

[deepin-ci-robot]

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[deepin-ci-robot]

Hi @leoliu-oc. Thanks for your PR.

I'm waiting for a deepin-community member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[opsiff]

/ok-to-test

[opsiff]

/lgtm

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在__mcheck_cpu_apply_quirks函数中新增了mca_cfg.bios_cmci_threshold的赋值操作，但未提供上下文信息，无法判断是否合理。
• 变量mca_cfg在函数中未定义，可能是一个全局变量，这可能导致潜在的命名冲突和内存管理问题。

是否建议立即修改:

• 是，需要提供mca_cfg的定义和上下文信息，并确保代码的清晰性和可维护性。

[opsiff]

意图上是不是类似于下面这个补丁，建议提交上游
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1f68ce2a027250aeeb1756391110cdc4dc97c797