Comments (2)
Freax13
commented on July 17, 2024
AFAIK there is no reason we don't support 5-level paging, it's just that no one has implemented it yet. It might require redesigning some of the abstractions to support both 4-level and 5-level paging. Feel free to come up with ideas.
Since it uses bits from 48 to 57 for the new level, I guess it would break the safety checks for the
VirtAddrtype, are there other things that would break?
This would also break/require redesign of the page table related abstraction including Mapper and its implementations.
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phil-opp
commented on July 17, 2024
For VirtAddr, we could add a new generic parameter that allows specifying 4-level or 5-level paging. If we default to 4-level paging, we might be even able to avoid a breaking change. Maybe it's also possible to something similar for OffsetPageTable, etc.
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Related Issues (20)
- Set minimal scoped permissions to github workflow HOT 1
- Create a Security Policy
- Mutable references in page table implementation? HOT 1
- IDT and page table code causing trouble in Confidential Computing space HOT 1
- Hash pin workflow dependencies HOT 9
- `Descriptor::tss_segment` too restrictive? HOT 2
- recursive page table with recursive index 511 is unsound HOT 7
- How can I set 2MiB page frame in my Page Directory Table? HOT 1
- How do I map to a virtualized physical address? HOT 1
- Enable OpenSSF Scorecard Action HOT 2
- Trait for Entry handler function types? HOT 2
- Should we add an register abstraction? How should it work with and ?
- `VirtAddr` arithmetic may panic HOT 2
- Returning FrameAlreadyMapped error when it shouldn't HOT 10
- Should have a way to construct an `InterruptStackFrameValue`? HOT 3
- A `VirtualAddr` panic is triggered when the page table called `clean_up` HOT 3
- `Sealed::DEBUG_STR` is publicly accessible HOT 10
- PageTable: Handling of pages without the present flag set HOT 2
- `Mapper::unmap` should be unsafe HOT 4
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