On 7/15/21 4:32 AM, Dov Murik wrote:
Just making sure I understand:
* sev_enabled() returns true for SEV or newer (SEV or SEV-ES or
SEV-SNP).
* sev_es_enabled() returns true for SEV-ES or newer (SEV-ES or SEV-SNP).
* sev_snp_enabled() returns true for SEV-SNP or newer (currently only
SEV-SNP).
Is that indeed the intention?
Yes. The SEV-SNP support requires the SEV and SEV-ES to be enabled. See
the text from the APM vol2 section 15.36.
The SEV-SNP features enable additional protection for encrypted
VMs designed to achieve stronger isolation from the hypervisor.
SEV-SNP is used with the SEV and SEV-ES features described in
Section 15.34 and Section 15.35 respectively and requires the
enablement and use of these features.
thanks
