On 20/01/23 15:53, Alexey Kardashevskiy wrote: > It is MSR_AMD64_SEV_DEBUG_SWAP (SEV, not SNP), it is an SEV-ES thing. Yes, noticed that, earlier analysis was that Debug Swap shouldn't need any guest side changes, but it does need it. > Why is that feature negotiation SNP-only and not SEV? As per the spec, GHCB termination request: reason code: 0x2 is SNP features specific. Regards Nikunj
