I am current playing with AMD SEV feature. I found there is a SEV-ES feature of SEV which will further protect register value of guest VM. However, I cannot find the code or patches for SEV-ES feature. I wonder whether the feature is now supported by AMD machine or when will the feature be supported. I cannot wait to try this new feature and wonder where can I get the patches or the code.
Besides, my model name is AMD EPYC 7251 8-Core Processor.