Hello Fabio,
Thank you for the quick response and for confirming the behavior.
You're right - the missing CPU flags (AVX, AVX2, VAES, etc.) when SEV-
SNP is enabled is expected behavior and occurs on both Ubuntu 24.04 and
AL2023. I apologize for the oversight.
I guess we are just puzzled on the
Public bug reported:
Description
When SEV-SNP is enabled on Ubuntu 24.04, RSA operations experience a
significant performance degradation (approximately 66% slower) compared
to when SEV-SNP is disabled. This appears to be caused by the loss of
crucial CPU instruction sets when SEV-SNP is enabled.
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