<fix>[kvm]: fix Hygon_Customized CPU mode migration failure

[ZStack-Robot]

Summary

• Issue: ZSTAC-73095 - Hygon cluster with custom CPU mode Hygon_Customized fails live migration with CPU feature mismatch
• Root Cause: KVMHost.java:4472 did not recognize CPU_MODE_HYGON_CUSTOMIZED as a special passthrough mode, treating it as a custom CPU model name. This caused invalid libvirt XML <cpu mode="custom"><model>Hygon_Customized</model></cpu>, which is not a valid libvirt CPU model.
• Fix: Added CPU_MODE_HYGON_CUSTOMIZED to the condition check and convert it to host-passthrough when building StartVmCmd. Aligns with existing conversion logic in VmCpuVendorKvmStartVmExtension.java:65-89.

Changes

• plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java: Added Hygon_Customized to host-passthrough conversion check (3 lines changed)

Test Plan

• Requires Hygon hardware environment for full validation
• Verify VM with Hygon_Customized CPU mode can live migrate between Hygon hosts
• Verify non-Hygon CPU modes are unaffected
• Fix follows same pattern as VmCpuVendorKvmStartVmExtension.java

Resolves: ZSTAC-73095

sync from gitlab !9167

[coderabbitai]

概览

本次提交扩展了KVM主机的虚拟机启动CPU模式处理逻辑，增加了对HYGON_CUSTOMIZED CPU模式的支持，并将其映射为HOST_PASSTHROUGH用于嵌套虚拟化配置。

变更列表

文件/内容组	变更摘要
CPU模式处理逻辑更新 plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java	添加HYGON_CUSTOMIZED CPU模式识别与处理，当vmCpuMode为HYGON_CUSTOMIZED时映射至HOST_PASSTHROUGH以支持嵌套虚拟化；其他模式行为保持不变。

代码审查工作量

🎯 2 (简单) | ⏱️ ~8 分钟

诗歌

🐰✨ 小兔来为你欢呼
Hygon芯片新添支持
CPU模式巧妙映射
嵌套虚拟更加顺畅
寥寥数行，大功告成！

🚥 Pre-merge checks | ✅ 2 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Merge Conflict Detection	⚠️ Warning	❌ Merge conflicts detected (4 files): ⚔️ build/pom.xml (content) ⚔️ core/pom.xml (content) ⚔️ network/src/main/java/org/zstack/network/service/DhcpExtension.java (content) ⚔️ plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java (content) These conflicts must be resolved before merging into 5.5.6.	Resolve conflicts locally and push changes to this branch.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题完整遵循 [scope]: 格式（59字符），准确总结了Hygon自定义CPU模式迁移失败的主要修复内容。
Description check	✅ Passed	描述详细阐述了问题背景、根本原因和修复方案，与代码变更内容完全相关且信息充分。

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch sync/ye.zou/fix/ZSTAC-73095

⚔️ Resolve merge conflicts (beta)

• Auto-commit resolved conflicts to branch sync/ye.zou/fix/ZSTAC-73095
• Create stacked PR with resolved conflicts
• Post resolved changes as copyable diffs in a comment

---

No actionable comments were generated in the recent review. 🎉

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 ast-grep (0.40.5)

plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

概览

在 KVMHost.startVm 方法中扩展了嵌套虚拟化处理逻辑，现支持 CPU_MODE_HYGON_CUSTOMIZED 模式。当模式为 HYGON_CUSTOMIZED 时，将其映射至 HOST_PASSTHROUGH，以避免 CPU 型号不匹配。其余分支保持不变。

变更

组织 / 文件	摘要
嵌套虚拟化模式处理 plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java	扩展 startVm 方法中的嵌套虚拟化条件判断，添加对 HYGON_CUSTOMIZED CPU 模式的支持，在该模式下将其转换为 HOST_PASSTHROUGH。

代码审查工作量评估

🎯 2 (简单) | ⏱️ ~12 分钟

诗

🐰 兔子的欢呼～
芯片又添新模式，
HYGON 自定义来相助，
虚拟机启动更顺畅，
CPU 不再有冲突！
小小改动大作用 ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	PR title follows the required [scope]: format with 59 characters, well under the 72-character limit, and clearly describes the fix for Hygon_Customized CPU mode migration failure.
Description check	✅ Passed	PR description is directly related to the changeset, providing detailed context about the issue, root cause, fix, and test plan for the Hygon_Customized CPU mode migration fix.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch sync/ye.zou/fix/ZSTAC-73095

---

No actionable comments were generated in the recent review. 🎉

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 ast-grep (0.40.5)

plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}