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If someone built a guest >> kernel with CONFIG_KVM_AMD_SEV=y they might be under the impression that >> this is performing evictions when it's actually just a stub function. > > That sooo needs to be in the commit message... I can send a v2 or if you want to modify the commit message with the following: The sev_evict_cache() is guest-related code and should be guarded by CONFIG_AMD_MEM_ENCRYPT, not CONFIG_KVM_AMD_SEV. CONFIG_AMD_MEM_ENCRYPT=y is required for a guest to run properly as an SEV-SNP guest, but a guest kernel built with CONFIG_KVM_AMD_SEV=n would get the stub function of sev_evict_cache() instead of the version that performs the actual eviction. Move the function declarations under the appropriate #ifdef. Let me know. Thanks, Tom >