Re: [Xen-devel] [xen vMCE RFC V0.2] xen vMCE design

[Christoph Egger]

Feedback from the AMD side:

slide 2:
- PV guests are supposed to install a MCE trap handler
  which reads the MSR values from struct mcinfo_bank.
  Hence it is unclear where the #GP should come from.
  Same for HVM guests which have a PV MCE "driver"
  (those are very rare in reality).

slide 3:
- unclear what "Weird per-domain MSRs" means
- unclear what "Unnatural MCE injection semantics" means

slide 4:
- typo: interace -> interface :-)
- enable UCR-related capabilities, but only on Intel machines
- Filter non-SRAO/SRAR banks:
  Rename it to "Let guest see northbridge bank only to the guest"

slide 7:
- ignore/disable CMCI and CTL2 on AMD

slide 8:
- Filter non-SRAO/SRAR banks:
  Rename it to "Let guest see northbridge bank only to the guest"
- Question: Should we allow the guest to inject errors? Does it make
  sense?
- always disable MCi_CTL2 on AMD

slide 9:
- Model specific issue: Also affects AMD as some models have
  l3 cache and some do not.
  E.g. it does not make sense to report l3 cache errors to guests


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