Fix cross-page-table sharing of mutable mappings (LVBS platform)#972
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sangho2 wants to merge 2 commits into
Open
Fix cross-page-table sharing of mutable mappings (LVBS platform)#972sangho2 wants to merge 2 commits into
sangho2 wants to merge 2 commits into
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🤖 SemverChecks 🤖 No breaking API changes detected Note: this does not mean API is unchanged, or even that there are no breaking changes; simply, none of the detections triggered. |
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@ziqiaozhou can you please help review this PR? Thanks! |
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This PR fixes cross-page-table sharing of mutable mappings. It now only clones the fixed kernel PML4 slots (
>= KERNEL_OFFSET) when it creates user (task) page tables to avoid duplicating transient mappings and intermediate tables for direct-map and vmap. It also sets stablePRESENT | WRITABLEto the parent table flags.