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WHV_E_VP_DOES_NOT_EXIST
Most VP operations require a previously created processor object
WHV_E_VP_DOES_NOT_EXIST means the partition has no virtual processor at the supplied index. Register access, execution, cancellation and deletion all depend on the VP creation lifecycle established by WHvCreateVirtualProcessor or its newer variant.
The error often reveals inconsistent controller state: a failed create was treated as success, a processor was deleted while another thread still referenced it, or the caller used a guest CPU identifier that does not match the WHP VP index.
Evidence and corrective action
- Confirm that partition setup completed and VP creation returned success for the exact index.
- Keep guest topology identifiers separate from host thread IDs and other processor numbering schemes.
- Serialize delete against register and run operations on the same VP.
- Rebuild the in-memory VP table after partition reset or recreation.
- Do not create a replacement blindly if the missing index indicates a wider failed initialization sequence.
References
- Microsoft: WHvCreateVirtualProcessor
- Microsoft: WHvDeleteVirtualProcessor
- Microsoft: Windows Hypervisor Platform API
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