On 6/8/2017 3:51 PM, Boris Ostrovsky wrote: > >> >>> What may be needed is making sure X86_FEATURE_SME is not set for PV >>> guests. >> >> And that may be something that Xen will need to control through either >> CPUID or MSR support for the PV guests. > > > Only on newer versions of Xen. On earlier versions (2-3 years old) leaf > 0x80000007 is passed to the guest unchanged. And so is MSR_K8_SYSCFG. The SME feature is in leaf 0x8000001f, is that leaf passed to the guest unchanged? Thanks, Tom > > -boris >
