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mitigations

I've noticed that switching from kvm64 CPU to x86-64-v2-AES or host slows down Windows guest insanely.

Mitigations can be disabled in Windows guest using this tool:

InSpectre

Another slowing-down feature: “Core isolation: memory integrity”

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity