Use of UEFI Multiprocessor feature failing

[ashupp]

Hello, 

i am using a custom efi app which utilizes EFI_MP_SERVICES_PROTOCOL.
As soon as StartupThisAP is launched i am getting a EFI_UNSUPPORTED Error.

I have never encountered a problem like this when running on any bare-metal or competitive products.

Is this currently not supported in you implementation? Or do i have to do something special to enable startup.
I am willing to help and also willing to test beta efi roms because this is really a showstopper for our infrastructure tests / merge.

Edit: I have also tried to load a current efi shell from which i run the app. Result is the same. So i came to the thought it could be something like not defined in main Firmware or is some kind of hardware restriction or that Pre-Efi thing...

I am using Workstation Pro 16.2.4 

Thanks and best regards, Alex

[louyo]

What are your host and guest OS?

[ashupp]

I tried with Host OS Windows 11 and Host OS Windows 10 64bit.

As Guest OS setting i tried all available to see if the behaviour changes - which did not.
In fact no Guest OS is installed. The App i am running is for UEFI shell only.