fix(kvm): disable PMU on aarch64 for Kunpeng-920 panic

[ZStack-Robot]

On Kunpeng-920 V200 7270Z/5230Z, openEuler 24.03 guest kernel panics
during boot because __armv8pmu_probe_pmu reads PMMIR_EL1 (PMUv3.4
register) which the host KVM (Kylin 4.19) does not handle, causing
kvm_inject_undefined and guest kernel panic.

Add vm.pmu GlobalConfig (ResourceConfig, VM/Cluster level) defaulting
to false. On aarch64, read this config and set in
domain XML. Users can re-enable via ResourceConfig if needed.

Resolves: ZSTAC-76375
Change-Id: I6096bf5215fd4ff0b3170b9d299e38c6

sync from gitlab !9508

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 32bb5fa and 6f83070.

📒 Files selected for processing (4)

• compute/src/main/java/org/zstack/compute/vm/VmGlobalConfig.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java
• test/src/test/groovy/org/zstack/test/integration/kvm/vm/VmPmuConfigCase.groovy

✅ Files skipped from review due to trivial changes (1)

• test/src/test/groovy/org/zstack/test/integration/kvm/vm/VmPmuConfigCase.groovy

🚧 Files skipped from review as they are similar to previous changes (1)

• plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java

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Walkthrough

添加 VM_PMU 全局配置并绑定到 VM/Cluster；在 KVM StartVm 命令中新增 pmu 字段；在 KVM 主机启动逻辑中对 AArch64 架构读取并应用资源级 VM_PMU 配置；新增集成测试覆盖默认与资源级覆盖行为。（≤50 字）

Changes

Cohort / File(s)	Summary
全局配置 compute/src/main/java/org/zstack/compute/vm/VmGlobalConfig.java	新增导出全局配置 VM_PMU（key=vm.pmu），类型 Boolean，默认值 false，校验值限定为 "true","false"，并通过 @BindResourceConfig 绑定到 VmInstanceVO 与 ClusterVO。注意资源级配置可覆盖。
KVM 命令 plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java	在 StartVmCmd 中新增 @GrayVersion("5.5.12") private boolean pmu = true 字段及其 public getter/setter；该字段随启动命令序列化发送。
KVM 主机逻辑 plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java	在 startVm(...) 中针对 OSArchitecture.AARCH64 分支，读取 VmGlobalConfig.VM_PMU（通过 ResourceConfigFacade、按 VM UUID 作用域），并将值设置到 StartVmCmd.pmu。
集成测试 test/src/test/groovy/org/zstack/test/integration/kvm/vm/VmPmuConfigCase.groovy	新增集成测试 VmPmuConfigCase：校验全局配置存在与默认值，验证 x86 启动命令中 pmu 默认行为，以及验证按 VM 的 ResourceConfig 覆盖并持久化后重启时生效。

Sequence Diagram(s)

sequenceDiagram
    participant VM as 虚拟机/调用者
    participant GlobalCfg as 全局配置系统
    participant KVMHost as KVM 主机
    participant ResourceCfg as 资源配置门面
    participant KVMCmd as KVMAgent StartVmCmd

    VM->>GlobalCfg: 查询 vm.pmu 默认值
    GlobalCfg-->>VM: 返回默认 false

    KVMHost->>KVMHost: 检测目标主机架构
    alt 架构 == AArch64
        KVMHost->>ResourceCfg: 按 VM UUID 读取 vm.pmu 资源级配置
        ResourceCfg-->>KVMHost: 返回资源级值（若存在）
        KVMHost->>KVMCmd: 设置 StartVmCmd.pmu = 资源级值或全局默认
    else 其他架构（如 x86_64）
        KVMHost->>KVMCmd: 保持 StartVmCmd.pmu 的默认行为（true/null）
    end

    KVMHost->>KVMCmd: 发送启动命令（包含 pmu）
    KVMCmd-->>KVMHost: 命令已准备/响应

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Estimated code review effort

🎯 3 (中等) | ⏱️ ~20 minutes

Poem

🐰 我是小兔检视者，轻啄代码花，
pmu 配置悄登场，架构间来回爬。
AArch64 听号令，资源级别说了算，
测试跑过验清楚，启动命令带花环。

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题遵循了指定的[scope]: 格式，长度为54字符，符合72字符限制，并准确反映主要变更内容。
Description check	✅ Passed	描述与变更集相关，详细说明了问题背景、解决方案和相关配置的实现，包含JIRA票号和同步信息。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

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• Commit unit tests in branch sync/zstackio/fix/5.5.12/ZSTAC-76375@@3

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🔧 ast-grep (0.42.0)

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

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In
`@test/src/test/groovy/org/zstack/test/integration/kvm/vm/VmPmuConfigCase.groovy`:
- Around line 138-140: The test only asserts PMU behavior for x86_64 (and null)
and misses an aarch64 branch; update VmPmuConfigCase.groovy to add an explicit
assertion for aarch64 by checking vm.architecture (e.g.,
"aarch64".equals(vm.architecture)) and assert startCmd.pmu == false with a clear
message like "aarch64 VM should have PMU disabled by default" next to the
existing x86_64/null check so the aarch64 regression is covered.
- Around line 180-182: The queryResourceConfig call that builds "conditions =
['name=${VmGlobalConfig.VM_PMU.name}', 'resourceUuid=${vm.uuid}']" is too broad
and may match same-named keys from other categories; update the conditions to
also include the correct category value (e.g., add
"category=${VmGlobalConfig.VM_PMU.category}" or the appropriate category string)
so the queryResourceConfig invocation filters by name, resourceUuid and category
for a precise assertion.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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Run ID: ea9fde7d-e3cf-45c5-8812-e507327bb723

📥 Commits

Reviewing files that changed from the base of the PR and between 1f6e0b3 and 32bb5fa.

📒 Files selected for processing (4)

• compute/src/main/java/org/zstack/compute/vm/VmGlobalConfig.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMHost.java
• test/src/test/groovy/org/zstack/test/integration/kvm/vm/VmPmuConfigCase.groovy

[MatheMatrix]

Comment from gitlab:

自上次添加REVIEWED标签(2026-03-31 17:55:58.000Z)后, 有新的COMMIT更新(2026-04-01 10:37:59.495Z), 所以移除了REVIEWED标签