HAOC: Add log message when HAOC is enabled

[ecjtusbs]

When HAOC is enabled via kernel command line, print an informational message to dmesg. This helps in verifying the feature status during boot.

Summary by Sourcery

Enhancements:

• Add an informational kernel log message when HAOC is enabled via the command line during x86_64 memory initialization.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds an informational kernel log message when HAOC is enabled via the kernel command line, emitted right before initializing the IEE mapping region, to make HAOC activation visible in dmesg during boot.

Sequence diagram for HAOC-enabled mem_init logging

sequenceDiagram
    participant Boot as BootProcess
    participant Kernel as Kernel
    participant Memory as mem_init
    participant Logger as printk
    participant IEE as iee_init

    Boot->>Kernel: start_kernel
    Kernel->>Memory: mem_init()
    Memory->>Memory: check haoc_enabled
    alt haoc_enabled is true
        Memory->>Logger: pr_info(HAOC is enabled by kernel command line.)
        Memory->>IEE: iee_init()
    else haoc_enabled is false
        Memory-->>IEE: iee_init() not called
    end
    Memory-->>Kernel: return
    Kernel-->>Boot: continue boot sequence

Loading

File-Level Changes

Change	Details	Files
Log HAOC activation when enabled and initializing the IEE mapping region.	Wrap existing haoc_enabled conditional body in braces to allow multiple statements. Insert pr_info call that logs that HAOC is enabled by the kernel command line. Retain the existing iee_init call and its behavior, only augmenting it with logging.	arch/x86/mm/init_64.c

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[deepin-ci-robot]

deepin pr auto review

我来对这个git diff进行审查：

1. 语法逻辑：

• 代码修改在语法上是正确的。将单行if语句扩展为if块并添加日志输出是合理的做法。
• 逻辑上，在启用haoc功能时添加日志输出，有助于调试和系统状态跟踪。

2. 代码质量：

• 优点：
  • 添加了日志输出，提高了代码的可观测性
  • 使用pr_info而不是printk，符合内核日志规范
• 建议：
  • 可以考虑在日志中添加更多上下文信息，比如HAOC的具体配置参数
  • 建议在日志中包含函数名或模块名，方便追踪

3. 代码性能：

• 性能影响微乎其微：
  • 仅在haoc_enabled为true时执行一次
  • pr_info的开销很小
• 无性能问题

4. 代码安全：

• 修改本身不引入安全风险
• 日志输出可能泄露系统配置信息，但HAOC启用状态通常不是敏感信息

改进建议：

if (haoc_enabled) {
    pr_info("HAOC: Initializing Intel IEE (In-Memory Encryption Engine)\n");
    iee_init();
}

修改理由：

1. 添加"HAOC:"前缀，使日志更容易过滤和识别
2. 提供更详细的描述，说明IEE是什么
3. 添加换行符\n，确保日志格式规范
4. 使用规范的内核日志格式

这样的修改既保持了原有功能，又提高了代码的可维护性和可观测性。

[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: opsiff

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[Copilot]

Pull request overview

This pull request adds informational logging to indicate when the HAOC (Hardware-Assisted Object Confinement) feature is enabled during x86_64 memory initialization. The log message helps system administrators and developers verify that HAOC has been successfully activated via the kernel command line parameter during boot.

Key Changes

• Added a pr_info() call to log when HAOC is enabled, improving boot-time observability

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[Copilot]

The log message should be more concise and consistent with kernel logging conventions. Based on similar feature enablement messages in the codebase (e.g., "PV spinlocks enabled", "CET detected: Indirect Branch Tracking enabled", "Virtual NMI enabled"), consider simplifying this message to just "HAOC enabled" without mentioning "by kernel command line", as this is implied by the fact that the log appears during boot initialization.

Suggested change

	pr_info("HAOC is enabled by kernel command line.");
	pr_info("HAOC enabled");