Excluded unsupported Hyper-v modules in hv_modules tests for CVMs.#4512
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CVMs do not surface emulated input devices or framebuffer/DRM over VMBus, so the corresponding kernel modules are intentionally absent in CVMs. Reference: https://elixir.bootlin.com/linux/v7.0/source/drivers/hv/channel_mgmt.c#L31 In the above file only modules with ".allowed_in_isolated = true," are available in CVMs. Below are modules that are not exposed to a guest when running as a Confidential VM. - hid_hyperv - hyperv_keyboard - hyperv_fb - hyperv_drm These modules should be skipped in checks for module presence and in reload tests on CVMs.
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Pull request overview
Adjusts the Hyper-V kernel module validation tests to account for Confidential VMs (CVMs), where certain host-emulated input/display VMBus devices (and corresponding kernel modules) are intentionally unavailable.
Changes:
- Add a CVM-unavailable module allowlist and skip those modules in initrd/module-presence checks and reload tests.
- Introduce a reusable
is_cvm()helper inlisa/features/security_profile.pyto detect confidential VMs from theSecurityProfilefeature.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| lisa/microsoft/testsuites/core/hv_module.py | Skips input/display-related Hyper-V modules for CVMs in presence/initrd/reload checks. |
| lisa/features/security_profile.py | Adds is_cvm() helper to detect Confidential VM security profile on a node. |
✅ AI Test Selection — PASSED3 test case(s) selected (view run) Marketplace image: redhat rhel 9_5 latest
Test case details
|
LiliDeng
approved these changes
Jun 9, 2026
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CVMs do not surface emulated input devices or framebuffer/DRM over VMBus, so the corresponding kernel modules are intentionally absent in CVMs. Reference: https://elixir.bootlin.com/linux/v7.0/source/drivers/hv/channel_mgmt.c#L31 In the above file only modules with ".allowed_in_isolated = true," are available in CVMs. Below are modules that are not exposed to a guest when running as a Confidential VM.
These modules should be skipped in checks for module presence and in reload tests on CVMs.
Description
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Test Validation
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