Disable X2APIC MSR offloads when XAPIC is in use
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tdx
- Dominant language
- Rust
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- Avg merge
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- Merged PRs (30d)
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Description
When hiding isolation from the guest, we allow the guest to run in XAPIC mode. When running in this configuration, we should not enable the X2APIC MSR offloads via the MSR bitmap, but we should still allow the other vAPIC offloads.
Contributor guide
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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 tracing the Rust code that configures the MSR bitmap and vAPIC offloads for guests running in XAPIC mode. The change is done when X2APIC MSR offloads are disabled in that configuration while the other vAPIC offloads remain enabled; add or update coverage if the relevant tests are found.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100