On Wed, Jul 22, 2020 at 09:54:40AM -0700, Erdem Aktas wrote:

I am using a custom, optimized and stripped down version, OVMF build.
Do you think it is because of the OVMF or grub?

Not sure, I havn't looked into how grub decides which entry point to
use.

In my case, there are 2 places where the CPUID is called: the first
one is to decide if long mode is supported, along with few other
features like SSE support and the second one is to retrieve the
encryption bit location.

Yes, it is basically the verify_cpu() function that is causing the
trouble. If you want to work around it you can comment it out in that
path for testing purposes.

Regards,

	Joerg