feat(vmem): fold space_aware_map dispatch#1419
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andreiltd wants to merge 1 commit intohyperlight-dev:mainfrom
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feat(vmem): fold space_aware_map dispatch#1419andreiltd wants to merge 1 commit intohyperlight-dev:mainfrom
andreiltd wants to merge 1 commit intohyperlight-dev:mainfrom
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Fixes: hyperlight-dev#1409 Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
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Pull request overview
This PR updates Hyperlight’s virtual-memory (vmem) multi-space page-table rebuild interface to be more architecture-specific and to centralize SpaceAwareMapping handling inside hyperlight_common::vmem, aligning with issue #1409.
Changes:
- Moves
SpaceReferenceMappingto be per-architecture (withVoidused on arches that never emitAnotherSpace), and replaces i686’s genericdepthwith an i686-specificSharedTableLevelenum. - Changes
vmem::space_aware_mapto takeSpaceAwareMappingand dispatch internally to eitherarch::maporarch::link_shared_table. - Updates snapshot rebuild code to call the unified
vmem::space_aware_mapAPI for bothThisSpaceandAnotherSpacecases.
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| src/hyperlight_host/src/sandbox/snapshot.rs | Updates snapshot rebuild loop to use the new unified vmem::space_aware_map API. |
| src/hyperlight_common/src/vmem.rs | Re-exports per-arch SpaceReferenceMapping and adds a wrapper space_aware_map that dispatches internally. |
| src/hyperlight_common/src/arch/i686/vmem.rs | Introduces SharedTableLevel + i686 SpaceReferenceMapping and renames the link operation to link_shared_table. |
| src/hyperlight_common/src/arch/amd64/vmem.rs | Defines SpaceReferenceMapping = Void and implements statically-unreachable link_shared_table for amd64. |
| src/hyperlight_common/src/arch/aarch64/vmem.rs | Defines SpaceReferenceMapping = Void and implements statically-unreachable link_shared_table for aarch64. |
| /// See [`walk_va_spaces`]: amd64 never emits `AnotherSpace`, so this | ||
| /// is unreachable in practice. It silently no-ops (rather than | ||
| /// panicking) to keep the architecture-independent re-export usable. | ||
| /// aarch64 never emits `AnotherSpace` entries, so [`SpaceReferenceMapping`] |
| /// is [`crate::vmem::Void`] making the `AnotherSpace` match arm statically unreachable. | ||
| pub type SpaceReferenceMapping = crate::vmem::Void; | ||
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| /// Statically unreachable: amd64 never emits `AnotherSpace`. |
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Fixes: #1409