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[libcpu/arm64] dealing with mem region out of kernel space

Open polarvid opened this issue 1 year ago • 3 comments

拉取/合并请求描述:(PR description)

[

为什么提交这份PR (why to submit this PR)

Relates to #8846

Dealing with mem region out of kernel space.

你的解决方案是什么 (what is your solution)

  • Fix parameter checking in _out_of_range() that NULL is excluded for fixed mapping
  • Split page install with a deferred stage to avoid mapping over ARCH_EARLY_MAP_SIZE

请提供验证的bsp和config (provide the config and bsp)

  • BSP:
  • .config:
  • action:

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

  • [ ] 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
  • [ ] 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality:

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

  • [ ] 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
  • [ ] 代码风格正确,包括缩进空格,命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
  • [ ] 没有垃圾代码,代码尽量精简,不包含#if 0代码,不包含已经被注释了的代码 All redundant code is removed and cleaned up
  • [ ] 所有变更均有原因及合理的,并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
  • [ ] 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
  • [ ] 代码是高质量的 Code in this PR is of high quality
  • [ ] 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification

polarvid avatar Apr 23 '24 13:04 polarvid

也可能会影响到启动速度?可以对启动速度留个心眼,因为这个也是关键性指标的。

BernardXiong avatar Apr 23 '24 21:04 BernardXiong

image

这个 CI 应该是 package 的问题,和本 PR 无关。

polarvid avatar Apr 24 '24 05:04 polarvid

也可能会影响到启动速度?可以对启动速度留个心眼,因为这个也是关键性指标的。

这里主要是把原本一次完成的内存初始化拆成两个部分,避免超过早期映射 1 GB 空间的限制。比如开发板有 8GB DDR,这个会把初始映射不能访问的 page 初始化延后。否则初始化完成就有可能分配到这些地址,触发访问异常。从算法上来说两次初始化需要遍历的内存区域没有什么区别。

polarvid avatar Apr 26 '24 02:04 polarvid