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SubjectRe: [PATCH v6 10/34] x86, x86/mm, x86/xen, olpc: Use __va() against just the physical address in cr3
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>
>> 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.

-boris

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