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SubjectRe: [PATCH kernel v3 3/3] x86/sev: Do not handle #VC for DR7 read/write
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On 24/1/23 21:37, Nikunj A. Dadhania 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.
Does the guest really need to terminate in such case? A VM could just
not do the GHCB thing if it does not want to.


--
Alexey

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