rust-osdev / rust-osdev/x86_64
[Question] Is there a reason to not support pagemaps level 5 ?
Nobody has claimed this yet.
- Dominant language
- Rust
- Stars
- 940
- Forks
- 157
- Avg merge
- 1d 10h
- Merged PRs (30d)
- 3
Description
PML5 is an Intel extension to increase addressable space from 256TB to 128PB (see wikipedia).
I admit it is a niche use case 🙂 But I was still wondering if there is any reason to not support it?
Since it uses bits from 48 to 57 for the new level, I guess it would break the safety checks for the VirtAddr type, are there other things that would break?
NB: The limine bootloader provides a way to detect if the CPU has the PML5 extension.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the VirtAddr safety checks and the PML5 details in the issue, then compare the library's current paging assumptions with the Limine detection path mentioned. Done would require a decided support scope and a documented list of affected interfaces, checks, and tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- operating-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100