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It is enough to return 0 if a guest need not do any preparation. This is in fact how sev_gmem_prepare() works for non-SNP guests, and it extends naturally to Intel hosts: the x86 callback for gmem_prepare is optional and returns 0 if not defined. Reviewed-by: Michael Roth <michael.roth@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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