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

Or:

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverride /t REG_DWORD /d 3 /f
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverrideMask /t REG_DWORD /d 3 /f