[AI Generated] BugFix: check OpenVMM virtualization support

[vyadavmsft]

Summary

Checks OpenVMM host hardware virtualization support before deciding whether /dev/kvm or /dev/mshv backends are available, so hosts without virtualization enabled report the correct skip reason.

Validation Results

Validation	Result
Focused guard-ordering harness	PASSED
OpenVMM selftests	PASSED
Black, Flake8, Pylint, MyPy	PASSED

[Copilot]

Pull request overview

This PR improves the OpenVMM upstream vmm_tests preflight checks by detecting whether hardware virtualization is enabled before concluding that /dev/kvm and /dev/mshv backends are unavailable, so that hosts without virtualization enabled return a more accurate skip reason.

Changes:

• Add an Lscpu.is_virtualization_enabled() guard in _ensure_vmm_tests_supported() to detect missing VT-x/AMD-V (or equivalent) earlier.
• Update and extend selftests to mock Lscpu and to assert the virtualization guard is evaluated before probing device paths.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
selftests/test_openvmm_tests_suite.py	Extends unit coverage by mocking Lscpu and adding a guard-ordering test.
lisa/microsoft/testsuites/openvmm/openvmm_tests.py	Adds virtualization-enabled detection to improve skip reason accuracy when /dev/kvm and /dev/mshv are absent.

[github-actions]

✅ AI Test Selection — PASSED

3 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

	Count
✅ Passed	0
❌ Failed	0
⏭️ Skipped	3
Total	3

Test case details

Test Case	Status	Time (s)	Message
verify_openvmm_stop_start_in_platform (lisa_0_2)	⏭️ SKIPPED	5.072	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.
verify_openvmm_restart_via_platform (lisa_0_1)	⏭️ SKIPPED	5.377	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.
verify_openvmm_guest_boot (lisa_0_0)	⏭️ SKIPPED	5.271	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.

[vyadavmsft]

@copilot resolve conflict

[Copilot]

@copilot resolve conflict

Resolved. The only conflict was in the selftests/test_openvmm_tests_suite.py import section — HEAD had Ubuntu while origin/main had CBLMariner. The resolution keeps CBLMariner (still used in test_before_case_initializes_host_before_os_check) and retains Lscpu from this branch's changes. All 9 selftests pass after the merge (commit dd5250e2).

[github-actions]

✅ AI Test Selection — PASSED

3 test case(s) selected (view run)

Marketplace image: microsoftcblmariner azure-linux-3 azure-linux-3 latest

	Count
✅ Passed	0
❌ Failed	0
⏭️ Skipped	3
Total	3

Test case details

Test Case	Status	Time (s)	Message
verify_openvmm_guest_boot (lisa_0_0)	⏭️ SKIPPED	5.224	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.
verify_openvmm_restart_via_platform (lisa_0_1)	⏭️ SKIPPED	5.510	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.
verify_openvmm_stop_start_in_platform (lisa_0_2)	⏭️ SKIPPED	4.874	before_case skipped: This suite only applies to OpenVMM guest nodes. Actual node type: RemoteNode.