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izsak
Contributor
Contributor

Disable side channel mitigations globally (KB79832)

I know I can disable side channel mitigations individually in the virtual machine settings. I need to disable it globally though because it is not feasible to edit each VM and in case I forget to disable it I face extremely poor performance on the machine (Ryzen 9 5950X with Windows 10 Pro 21H2).

Is there per machine setting in VMware Workstation Pro to disable side channel mitigations in each virtual machine?

Link to the KB: https://kb.vmware.com/s/article/79832

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bluefirestorm
Champion
Champion

Machine wide global settings put the dictionary entry in %PROGRAMDATA%\VMware\VMware Workstation\config.ini.

This file is set as readonly and requires admin rights to edit.

User-based global settings %APPDATA%\VMware\Config.ini (but this file does not exist by default).

Disable Side channel mitigation entry to add

ulm.disableMitigations = "TRUE"