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LVBS: Use reference counters for page tables - #1246

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Sangho Lee (sangho2) merged 5 commits into
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sanghle/lvbs/arc_pt
Sep 1, 2026
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LVBS: Use reference counters for page tables#1246
Sangho Lee (sangho2) merged 5 commits into
mainfrom
sanghle/lvbs/arc_pt

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@sangho2 Sangho Lee (sangho2) commented Aug 31, 2026 •
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This PR uses Arc reference counters for LVBS/OP-TEE page tables to safely share them across cores. In particular, it makes the page-table lifetime/ownership explicit rather than relies on session-level serialization.

github-advanced-security[bot]
github-advanced-security Bot found potential problems Aug 31, 2026
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Comment thread litebox_runner_lvbs/src/lib.rs Fixed
@sangho2 Sangho Lee (sangho2) changed the title [DRAFT] LVBS: Use Arc for the PageTable structure [DRAFT] LVBS: Use Arc for page tables Aug 31, 2026
@sangho2 Sangho Lee (sangho2) changed the title [DRAFT] LVBS: Use Arc for page tables [DRAFT] LVBS: Use Arc for shared page tables Aug 31, 2026
@sangho2 Sangho Lee (sangho2) changed the title [DRAFT] LVBS: Use Arc for shared page tables [DRAFT] LVBS: Use Arc for page tables Aug 31, 2026
@sangho2 Sangho Lee (sangho2) changed the title [DRAFT] LVBS: Use Arc for page tables LVBS: Use Arc for page tables Aug 31, 2026
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Sangho Lee (sangho2) marked this pull request as ready for review August 31, 2026 20:57
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Sangho Lee (sangho2) marked this pull request as draft August 31, 2026 22:41
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Sangho Lee (sangho2) marked this pull request as ready for review August 31, 2026 23:05
wdcui
Weidong Cui (wdcui) reviewed Sep 1, 2026
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Comment thread litebox_platform_lvbs/src/lib.rs Outdated
@sangho2 Sangho Lee (sangho2) changed the title LVBS: Use Arc for page tables LVBS: Use reference counters for page tables Sep 1, 2026
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github-actions Bot commented Sep 1, 2026

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🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

Click for details 
--- failure auto_trait_impl_removed: auto trait no longer implemented ---

Description:
A public type has stopped implementing one or more auto traits. This can break downstream code that depends on the traits being implemented.
        ref: https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/auto_trait_impl_removed.ron

Failed in:
  type PerCpuVariables is no longer UnwindSafe, in /home/runner/work/litebox/litebox/litebox_platform_lvbs/src/host/per_cpu_variables.rs:28

@sangho2
Sangho Lee (sangho2) added this pull request to the merge queue Sep 1, 2026
Merged via the queue into main with commit fde3bb4 Sep 1, 2026
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@sangho2
Sangho Lee (sangho2) deleted the sanghle/lvbs/arc_pt branch September 1, 2026 21:33
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@wdcui Weidong Cui (wdcui) wdcui approved these changes
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