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feat: arm64: update thread self on sp-switch #9466

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feat: arm64: update thread self on sp-switch #9466

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Commits on Sep 25, 2024

  1. feat: arm64: update thread self on sp-switch 

    This patch improves the atomicity of context switching by ensuring that
the stack pointer (sp) and thread self updates occur simultaneously.
This enhancement is crucial for maintaining thread safety and
preventing potential inconsistencies during context switches.

Changes:
- Modified `cpuport.h` to use `ARM64_THREAD_REG` for thread self access.
- Added an `update_tidr` macro in `context_gcc.S` to streamline thread ID
  updates.
- Adjusted `rt_hw_context_switch_to` and `rt_hw_context_switch` to call
  `update_tidr`, ensuring atomic updates during context switches.
- Cleaned up `scheduler_mp.c` by removing redundant thread self
  assignments.

Signed-off-by: Shell <[email protected]>
    @polarvid
    polarvid committed Sep 25, 2024
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